WO2021033435A1 - Solid-liquid separation system - Google Patents

Abstract

A solid-liquid separation system (100) comprises a final settling pond (P), an inclined plate apparatus (10), and a short circuit flow prevention plate (18). The inclined plate apparatus (10) is disposed inside the final settling pond (P) and has a plurality of inclined plates (20) for sewage. The short circuit flow prevention plate (18) is disposed so as to overlap some of the plurality of inclined plates (20) for sewage in plan view.

Description

Solid-liquid separation system

The present invention relates to a solid-liquid separation system.

In the conventional sedimentation basin with water treatment specifications, a plurality of inclined plates are used to improve the sedimentation area, and the inclined plates cause flocs (aggregates in which fine particles are associated to form larger aggregates). A system was developed to deposit and purify water.

These technologies have been diverted to sewage treatment. As a background to this, in recent years, sewage treatment plants have been required to upgrade existing facilities from the viewpoint of reducing the environmental load, and along with this, the final settling basin. (See Patent Document 1).

According to "Sewerage Facility Planning / Design Guidelines and Explanations-2009 Edition-" (Japan Sewerage Association), the treatment capacity of the final settling basin is determined by the amount of inflow water per day (water area load) with respect to the settling area of sludge. Be done. The settling area of sludge is the area of the portion that finally captures the sludge, and corresponds to the area of the bottom surface of the final settling basin where the settled sludge arrives, usually the area of the final settling basin itself.

Therefore, if a larger final settling basin is newly constructed, the effect on the water quality of the treated water will be smaller even if the inflow water volume increases due to the effects of time fluctuations and daily fluctuations. Therefore, it is usually designed for the maximum daily water volume, so if the facility is designed for the peak water volume due to inflow fluctuation, there is a problem that excessive capital investment is required. Therefore, in order to improve the efficiency of the existing final settling basin, a technique using an inclined plate that improves the processing capacity with a small capital investment has been proposed.

Japanese Patent No. 6182190

In the conventional configuration of the above patent document, the flow velocity is slower in the rear stage portion than in the front stage portion of the inclined plate device, so that the inflow water to the device tends to concentrate in the front stage portion. Therefore, by adjusting the length of the inclined plate in the rear stage to be short or adjusting the arrangement of the inclined plate so that the arrangement pitch of the rear stage is wide, the flow resistance is reduced and the flow rate is evenly distributed to the entire device. How to do it is shown.

However, in any of the methods, the effective settling area of the inclined plate is reduced, so that the processing capacity of the inclined plate device is reduced.

An object of the present invention is to provide a solid-liquid separation system capable of suppressing a flow rate bias in a plurality of inclined plates without reducing an effective sedimentation area.
(Means to solve problems)
In order to achieve the above object, the solid-liquid separation system according to the first invention includes a settling basin, an inclined plate device, and a plate-shaped member. The tilt plate device is arranged in a settling pond and has a plurality of tilt plates. The plate-shaped member is arranged so as to partially overlap the plurality of inclined plates in a plan view.

Since the plate-shaped member arranged in this way acts as a resistance to water flow, it becomes difficult for water to flow between the inclined plates arranged above the plate-shaped member. Therefore, for example, by arranging the plate-shaped member in the front stage portion of the inclined plate device in which the inflow water is concentrated, it becomes difficult for water to flow into the front stage portion, and the flow rate flowing into the rear stage portion can be increased.

That is, by appropriately arranging the plate-shaped member below the inclined plate in which the inflow water tends to be larger than the others, the flow rate can be distributed more evenly and the unevenness of the flow rate can be suppressed.

Further, since it is not necessary to widen the interval between the inclined plates in the rear stage portion and it is not necessary to shorten the length of the inclined plates, it is not necessary to reduce the effective sedimentation area, and it is possible to prevent a decrease in the processing capacity. ..

In this way, it is possible to suppress the bias of the flow rate in a plurality of inclined plates without reducing the effective sedimentation area.

The solid-liquid separation system according to the second invention is a solid-liquid separation system according to the first invention, and further includes an inflow portion, an outflow portion, and a blocking plate. In the inflow section, the water to be treated flows into the sedimentation basin. In the outflow part, treated water flows out from the sedimentation basin. The blocking plate is arranged on the inflow portion side of the inclined plate device. The plate-shaped member is arranged on the outflow portion side of the blocking plate. The plate-like member faces at least a part of the distance between the inclined plate arranged closest to the blocking plate and the blocking plate.

As a result, it is possible to suppress a short-circuit flow that does not flow between the inclined plates, passes between the blocking plate and the inclined plate device, passes above the inclined plate device, and heads for the outflow portion.

The solid-liquid separation system according to the third invention is the solid-liquid separation system according to the first invention, and the plate-shaped member has an opening.

As a result, water can pass through the opening and resistance to the water flow can be given. Therefore, it is possible to prevent the flow rate from being biased on the inclined plate on the inflow portion side.

The solid-liquid separation system according to the fourth invention is the solid-liquid separation system according to the third invention, and the opening is based on the area of the plate-shaped member when it is assumed that the opening is not formed. It has an area of 5 to 90%.

This makes it possible to appropriately resist the water flow.

The solid-liquid separation system according to the fifth invention is the solid-liquid separation system according to any one of the first to fourth inventions, and the plate-shaped member has a distance of 0 to the lower end of the inclined plate. It is connected to the tilt plate device so that it can be adjusted between 1000 mm.

This makes it possible to adjust the plate-shaped member to an appropriate position.

The solid-liquid separation system according to the sixth invention is the solid-liquid separation system according to the first invention, and further includes an inflow portion and an outflow portion. In the inflow section, the water to be treated flows into the sedimentation basin. In the outflow part, treated water flows out from the sedimentation basin. The inclined plate device is arranged between the inflow part and the outflow part by opening a predetermined lower space from the bottom surface of the settling basin. A water flow guide surface facing a part of the inclined plate is provided from a position exceeding the water surface of the water to be treated to the bottom surface of the inclined plate device.

By providing the water flow guide surface in this way, it is possible to reduce the rapid contraction of the flow path when the water to be treated flows into the lower side of the inclined plate, so that the speed of the water flow flowing into the space under the inclined plate device It is possible to suppress the increase. Therefore, it is possible to suppress the imbalance of the flow velocity distribution in the space below the inclined plate device.

Note that, in the present specification, "opposing" includes facing each other via another member.

The solid-liquid separation system according to the seventh invention is the solid-liquid separation system according to the sixth invention, and the water flow guide surface is a surface on the inflow portion side of the endmost inclined plate arranged on the inflow portion side. Further, it is also used as either one of the inflow portion side surface of the provided blocking plate or the inflow portion side surface of the endmost inclined plate and the further provided blocking plate.

As a result, the water flow guide surface can be formed by using at least one surface of the inclined plate and the blocking plate on the inflow portion side, so that the sudden contraction of the flow path can be reduced with a simple configuration without increasing the number of parts. it can.

The solid-liquid separation system according to the eighth invention is the solid-liquid separation system according to the sixth or seventh invention, and the length of the inclined portion of the water flow guide surface is 100 to 2000 mm, and the water flow guide surface and the water flow guide surface. The angle formed by the horizontal direction is 20 ° to 70 °.

As a result, the sludge settled on the member on which the water flow guide surface is formed can be appropriately dropped to the bottom surface of the settling basin.

The solid-liquid separation system according to the ninth invention is the solid-liquid separation system according to the seventh invention, and includes at least one first support portion and a second support portion. The first support portion supports the inclined plate device in the settling basin. The second support section supports the blocking plate in the sedimentation basin. The first support portion and the second support portion are separately fixed to the side wall of the settling basin.

As a result, when vibration is applied due to an earthquake or the like, both sides do not affect each other, so that seismic resistance can be improved.

The solid-liquid separation system according to the tenth invention is the solid-liquid separation system according to the first invention, and further includes an inflow portion and an outflow portion. In the inflow section, the water to be treated flows into the sedimentation basin. In the outflow part, treated water flows out from the sedimentation basin. A plurality of inclined plates are arranged side by side in a predetermined direction in the settling basin. The plurality of inclined plates are arranged so that adjacent inclined plates are opposed to each other and parallel to each other. Each inclined plate is inclined so as to be located on the inflow portion side toward the upper side. At least a part of the inclined plates among the plurality of inclined plates has a main body portion and a bent portion provided at the lower end of the main body portion and bent with respect to the main body portion. Assuming that the length of the bent portion projected in the predetermined direction is b and the distance between the inclined plates in the predetermined direction is c, 0.20 ≦ b / c ≦ 0.90 is satisfied.

By providing the bent portion in the inclined plate in this way, the opening area between the plurality of inclined plates can be limited, so that the flow rate flowing between the inclined plates can be limited. Therefore, by arranging an inclined plate having at least a bent portion in the vicinity of the front stage on the side close to the inflow portion of the plurality of inclined plates, the flow rate flowing between the inclined plates in the front stage is reduced, and between the inclined plates in the rear stage on the side far from the inflow portion. The flow rate flowing into can be increased.

That is, by appropriately arranging the inclined plates provided with the bent portions, the flow rate flowing between the inclined plates can be adjusted, and the uneven flow rate in the plurality of inclined plates can be suppressed.

Further, even when all the inclined plates are provided with bent portions, the inflow resistance between the inclined plates increases as the flow velocity increases, so that the inflow occurs in the previous stage where the flow velocity is high as compared with the case where the bent portions are not provided. The resistance increases and the inflow amount decreases, and the inflow resistance decreases and the inflow amount increases in the subsequent stage where the flow velocity slows down. Therefore, it is possible to suppress the unevenness of the flow rate in the plurality of inclined plates.

Further, since it is not necessary to widen the interval between the inclined plates in the rear stage than in the front stage and it is not necessary to shorten the length of the inclined plates in the rear stage, it is not necessary to reduce the effective sedimentation area, and the processing capacity can be increased. The decrease can be prevented.

In this way, it is possible to suppress the bias of the flow rate in a plurality of inclined plates without reducing the effective sedimentation area.

The solid-liquid separation system according to the eleventh invention is the solid-liquid separation system according to the tenth invention, and the bent portion is bent so as to extend from the lower end of the main body portion to the opposite side of the inflow portion.

As a result, the lower openings of the plurality of inclined plates face the opposite side to the inflow portion, so that the flow resistance increases and the amount of inflow between the inclined plates can be reduced.

The solid-liquid separation system according to the twelfth invention is the solid-liquid separation system according to the tenth or eleventh invention, and the intervals between the plurality of inclined plates are all the same.

As a result, it is possible to suppress the deviation of the flow rate in a plurality of inclined plates without reducing the effective sedimentation area.

The solid-liquid separation system according to the thirteenth invention is the solid-liquid separation system according to any one of the tenth to twelfth inventions, and is formed between the main body portion and the bent portion on the opposite side of the inflow portion of the inclined plate. The angle formed is 120 degrees or more and less than 180 degrees.

If this angle is less than 120 degrees, sedimented sludge will accumulate on the bent part, which may require cleaning by an operator. Further, when the angle exceeds 180 degrees, the openings at the lower portions of the plurality of inclined plates face the inflow portion side, so that the flow resistance is lowered and it becomes difficult to reduce the inflow amount between the inclined plates.

Therefore, by setting the angle to 120 degrees or more and less than 180 degrees, it is possible to increase the flow resistance and reduce the inflow amount between the inclined plates. Therefore, the amount of inflow to the inclined plate can be adjusted, and the unevenness of the flow rate in the plurality of inclined plates can be suppressed.
(Effect of the invention)
According to the present invention, it is possible to provide a solid-liquid separation system capable of suppressing the deviation of the flow rate in a plurality of inclined plates without reducing the effective sedimentation area.

The side view which shows the solid-liquid separation system in embodiment which concerns on this invention. The perspective view which shows typically the structure of the inclined plate apparatus of the solid-liquid separation system of FIG. The side view which shows typically the inclined plate apparatus of FIG. The front view which saw the arrangement of the inclined plate apparatus of FIG. 2 along the direction of arrow D. The plan view which shows the positional relationship of the inclined plate for sewage and the short-circuit flow prevention plate of FIG. (A) A plan view showing the second surface side of the sewage inclined plate of FIG. 3, and (b) a plan view showing the first surface side of the sewage inclined plate of FIG. (A), (b) is a plan view showing another example of the short-circuit flow prevention plate of FIG. (A), (b) is a plan view showing another example of the short-circuit flow prevention plate of FIG. (A), (b) is a plan view showing another example of the short-circuit flow prevention plate of FIG. (A), (b) is a plan view showing another example of the short-circuit flow prevention plate of FIG. (A) A side view showing the mounting member of FIG. 3, and (b) a front view of the mounting member of FIG. 3 viewed along the direction of arrow D. FIG. 3 is a perspective view showing attachment of a sewage inclined plate to a support rod in the inclined plate device of FIG. FIG. 3 is a perspective view showing attachment of a sewage inclined plate to a support rod in the inclined plate device of FIG. The side view which shows the solid-liquid separation system in Embodiment 2a which concerns on this invention. The perspective view which shows typically the structure of the inclined plate apparatus of the solid-liquid separation system of FIG. A side view schematically showing the inclined plate device of FIG. FIG. 3 is a cross-sectional view schematically showing the space between AA'in FIG. FIG. 16 is a diagram showing a state in which the blocking plate and the hanging bolts and girders connected to the blocking plate are omitted from FIG. (A) A plan view showing the second surface of the sewage inclined plate of FIG. 13, and (b) a plan view showing the first surface of the sewage inclined plate of FIG. The side view which shows the water flow in the vicinity of the inflow part blocking plate and the sewage inclined plate in the embodiment which concerns on this invention. The side view which shows the water flow in the vicinity of the conventional inflow part blocking plate and the sewage inclined plate. The side view which shows the water flow in the vicinity of the conventional inflow part blocking plate and the sewage inclined plate. The partial side view which shows the solid-liquid separation system in Embodiment 2b which concerns on this invention. The partial side view which shows the solid-liquid separation system in Embodiment 2c which concerns on this invention. The perspective view which shows the inclined plate in the modification of embodiment which concerns on this invention. The side view which shows the solid-liquid separation system in embodiment which concerns on this invention. The perspective view which shows typically the structure of the inclined plate apparatus of the solid-liquid separation system of FIG. A side view schematically showing the inclined plate device of FIG. 24. (A) A plan view showing the second surface side of the sewage inclined plate of FIG. 25, and (b) a plan view showing the first surface side of the sewage inclined plate of FIG. 25. FIG. 4 is a side view schematically showing another example of the inclined plate device of FIG. 24. It is a figure which shows the graph of the inflow resistance to the inclined plate apparatus with respect to the flow velocity of the lower part of the inclined plate apparatus of FIG. FIG. 6 is a perspective view showing attachment of a sewage inclined plate to a support rod in the inclined plate device of FIG. 24. FIG. 6 is a perspective view showing attachment of a sewage inclined plate to a support rod in the inclined plate device of FIG. 24. The plan view for demonstrating the arrangement of the inclined plate for sewage in an Example. The side view which shows the solid-liquid separation system in Embodiment 4 which concerns on this invention. The perspective view which shows typically the structure of the inclined plate apparatus of the solid-liquid separation system of FIG. 32. A side view schematically showing the tilt plate device of FIG. 33. A front view of the arrangement of the inclined plate device of FIG. 33 as viewed along the direction of arrow D. (A) A plan view showing the second surface side of the sewage inclined plate of FIG. 34, and (b) a plan view showing the first surface side of the sewage inclined plate of FIG. 34. The figure which shows an example of the structure of the attachment part of FIG. 32. The figure which shows an example of the structure of the attachment part of FIG. 32. A side view showing a state in which the amount of sludge accumulation is locally increasing. The perspective view which shows the inclined plate in the modification of embodiment which concerns on this invention. The side view which shows the solid-liquid separation system in Embodiment 5a which concerns on this invention. The perspective view which shows a part of the inclined plate apparatus of FIG. 41. FIG. 41 is a cross-sectional view taken along the line between AA'in FIG. 41. FIG. 4 is a schematic view of a solid-liquid separation system along a water flow direction D for explaining the lateral block plate of FIG. 43. FIG. 4 is a schematic plan view showing a configuration in the vicinity of the side blocking plate of FIG. 43. The schematic diagram which shows the state which the side blocking plate is fixed to the upper and lower frame members. FIG. 4 is a schematic plan view showing the upper and lower frame members, the fixing jig, and the side blocking plate of FIG. 46A. FIG. 46B is a plan view of the flat steel of the fixing jig. Front view of flat steel of FIG. 46C. The schematic plan view which shows the side blocking plate in the modification of Embodiment 5a which concerns on this invention. The side view which shows the solid-liquid separation system in Embodiment 5b which concerns on this invention. FIG. 4 is a perspective view showing a part of the inclined plate device of FIG. 48. A side view showing the inclined plate device and the inflow portion blocking plate of FIG. 48. FIG. 4 is a cross-sectional view taken along the line between XX'in FIG. 48. FIG. 51 is an enlarged view of the V portion. The plan view which shows the final settling basin and the side blocking plate of FIG. 48. The schematic plan view which shows the side blocking plate in the modification of Embodiment 5b which concerns on this invention.

Hereinafter, the solid-liquid separation system according to the embodiment of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
<Composition>
(Solid-liquid separation system 100)
FIG. 1 is a diagram showing a solid-liquid separation system 100 of the present embodiment. The solid-liquid separation system 100 of the present embodiment is applied to the solid-liquid separation of the water to be treated W in the final settling basin P of the sewage treatment plant.

As shown in FIG. 1, the solid-liquid separation system 100 includes a final settling basin P (an example of a settling basin), an inclined plate device 10, a diversion plate 11, an overflow weir 12, a water channel 13, and an inflow portion. A 14 and an outflow portion 15, a sludge scraper 16, a sludge hopper 17, a short-circuit flow prevention plate 18 (an example of a plate-shaped member), and a mounting member 19 are provided.

In the inflow section 14, raw water (water to be treated W) flows into the final settling basin P. The outflow portion 15 is provided on the opposite side of the inflow portion 14 in the final settling basin P, and the purified water W to be treated flows out from the final settling basin P.

The inclined plate device 10 is arranged on the downstream side (outflow portion 15 side) from the substantially central portion of the final settling basin P. The tilt plate device 10 has a plurality of tilt plates 20 for sewage. The plurality of sewage inclined plates 20 are arranged side by side from the upstream side to the downstream side with the water surface side tilted toward the inflow portion 14.

The inclined plate device 10 is supported so that the water to be treated W sinks to a predetermined depth from the water surface and a predetermined space is secured between the inclined plate device 10 and the bottom surface of the final settling basin P. This support may be suspended from a girder or the like, or may be placed on a support (not shown), for example. The details of the inclined plate device 10 will be described in detail later.

The blocking plate 11 is provided on the upstream side (inflow portion 14 side) of the inclined plate device 10 and at a substantially central portion of the final settling basin P. The flow blocking plate 11 blocks the flow of the water to be treated W to the downstream side (outflow portion 15 side) in the region from the water surface to a predetermined depth. The blocking plate 11 is arranged so that the main surface is substantially perpendicular to the direction of the water flow flowing in from the inflow portion 14.

The overflow weir 12 is arranged near the water surface of the water to be treated W on the downstream side (outflow portion 15 side) of the flow blocking plate 11. The overflow weir 12 is formed along the direction from the upstream side to the downstream side.

The waterway (trough) 13 is formed by being surrounded by the overflow weir 12 and is connected to the outflow portion 15. In addition, the structure is not limited to the overflow weir 12, and a hole may be formed in the pipe.

The water W to be treated that has flowed into the final settling basin P from the inflow portion 14 is blocked by the blocking plate 11 in the water flow direction (direction of arrow D), and is between the lower end of the blocking plate 11 and the bottom surface of the final settling basin P. It descends toward the part of. The water W to be treated that has passed between the bottom surface of the final settling basin P and the lower end of the blocking plate 11 becomes an upward flow J toward the water channel 13, and is between the lower portion 10a of the inclined plate device 10 and the inclined plate 20 for sewage. It flows into and rises.

Then, the sludge of the water to be treated W is settled while passing through the inclined plate device 10, and is settled on the first surface 20a of the inclined plate 20 for sewage to purify the water to be treated W. The sludge settled on the first surface 20a of the sewage inclined plate 20 falls by its own weight as it is deposited.

The sludge scraper 16 is arranged near the bottom surface of the final settling basin P. Settled sludge M is deposited near the bottom surface of the final settling basin P. The accumulated sludge M is collected in the sludge hopper 17 by the sludge scraper 16 rotating clockwise in FIG. 1, and is discharged. The sludge scraper 16 passes near the water surface on the upstream side of the blocking plate 11 and also scrapes suspended matter.

The sludge hopper 17 is formed on the bottom surface near the inflow portion 14 of the final settling basin P.

The short-circuit flow prevention plate 18 is arranged below the inclined plate device 10. The short-circuit flow prevention plate 18 gives resistance to the inflow water to the front stage portion of the inclined plate device 10, and suppresses the unevenness of the amount of inflowing water in the front stage portion and the rear stage portion. Further, the short-circuit flow prevention plate 18 short-circuits the inclined plate device 10 by passing between the flow blocking plate 11 and the inclined plate device 10 without allowing the water to be treated to pass between the inclined plates 20 for sewage of the inclined plate device 10. Prevent from doing.

The mounting member 19 mounts the short-circuit flow prevention plate 18 to the inclined plate device 10.

(Inclination plate device 10)
FIG. 2 is a perspective view schematically showing a part of the configuration of the inclined plate device 10. FIG. 3 is a side view showing the inclined plate device 10 and the blocking plate 11. FIG. 4A is a diagram showing an inclined plate device 10 in a cross section perpendicular to the direction D of the inclined plate device 10. FIG. 4B is a plan view showing the arrangement relationship between the short-circuit flow prevention plate 18 and the sewage inclined plate 20.

FIG. 5A is a plan view showing the second surface 20b side of the sewage inclined plate 20. FIG. 5B is a plan view showing the first surface 20a side of the sewage inclined plate 20.

As shown in FIG. 2, the inclined plate device 10 includes a plurality of inclined plates 20 for sewage, a pair of upper frames 21, a pair of lower frames 22, a plurality of support rods 23, a plurality of hooks 24, and the like. have.

The pair of upper frames 21 are arranged along the direction D (an example of a predetermined direction) from the inflow portion 14 to the outflow portion 15. The pair of upper frames 21 are arranged parallel to each other.

The pair of lower frames 22 are arranged along the direction D from the inflow portion 14 to the outflow portion 15. The pair of lower frames 22 are arranged parallel to each other. The pair of upper frames 21 are arranged closer to the water surface than the pair of lower frames 22.

The plurality of support rods 23 are erected in parallel between the pair of upper frames 21 and also in parallel between the pair of lower frames 22.

The sewage tilt plate 20 is tilted with respect to the pair of upper frames 21 and the pair of lower frames 22 and attached to the pair of upper and lower support rods 23.

As shown in FIGS. 4A and 4B, a plurality of inclined plates 20 for sewage (three in the figure) are arranged along the width direction F of the final settling basin P. In this case, for example, the upper frame 21 and the lower frame 22 located on the right side of the sewage inclined plate 20 arranged on the leftmost side in FIG. 4A are the upper side located on the left side of the sewage inclined plate 20 in the middle. It may also serve as the frame 21 and the lower frame 22. Further, the upper frame 21 and the lower frame 22 located on the left side of the sewage inclined plate 20 arranged on the rightmost side in FIG. 4A are the upper frame 21 and the lower side located on the right side of the sewage inclined plate 20 in the middle. It may also serve as the frame 22.

The upper frame 21 is locked and supported by a hanging bolt 31 from above, and the hanging bolt 31 is fixed to a girder member 32 arranged along the width direction. Further, the girder member 32 is fixed to the wall surface Ps facing the final settling basin P. With such a configuration, the inclined plate device 10 is supported so as to sink from the water surface of the water to be treated W to a predetermined depth and to secure a predetermined space between the inclined plate device 10 and the bottom surface of the final settling basin P. ..

(Sewage tilt plate 20)
The sewage inclined plate 20 is formed of a substantially rectangular member. Hard vinyl chloride is preferable as the material of the inclined plate 20 for sewage, but the material is not limited to this. The material of the inclined plate is, for example, a thermoplastic resin, for example, a vinyl resin such as polyvinyl chloride, a carbonate resin such as polycarbonate, an ester resin such as polyethylene terephthalate, an acrylic resin such as polymethyl methacrylate, polypropylene, polyethylene, etc. It may be an olefin resin, a styrene resin such as ABS, a copolymer or a mixed resin thereof, or a thermosetting resin such as an epoxy resin or an unsaturated polyester resin, and may be a metal, ceramic, or the like. It may be wood, rubber, or the like.

The sewage inclined plate 20 has a first surface 20a on the upper frame 21 side and a second surface 20b on the lower frame 22 side. A plurality of inclined plates 20 for sewage are arranged side by side so as to be inclined along the length direction (direction D) of the upper frame 21 and the lower frame 22. The inclined plate device 10 is installed in the final settling basin P of the sewage treatment plant with the lower frame 22 facing the bottom surface side of the final settling basin P. The second surface 20b of the sewage inclined plate 20 is directed to the bottom surface side of the final settling basin P.

The sewage inclined plate 20 is locked and attached to the support rods 23 arranged above and below by a plurality of hooks 24.

As shown in FIGS. 5 (a) and 5 (b), the sewage inclined plate 20 has a first surface 20a, a second surface 20b, an upper end portion 20i, a lower end portion 20j, and a first end portion 20c. And a second end portion 20d.

When the sewage inclined plate 20 is attached to the pair of upper frames 21, the pair of lower frames 22, and the support rods 23 described above, the upper end portion 20i and the lower end portion 20j are supported as shown in FIG. It is arranged substantially parallel to the rod 23. Further, the upper end portion 20i is arranged above the upper frame 21, and the lower end portion 20j is arranged below the lower frame 22.

The first end portion 20c and the second end portion 20d are arranged so as to be inclined from the upper frame 21 toward the lower frame 22.

The plurality of inclined plates 20 for sewage are arranged side by side along the direction D in which the water to be treated flows from the inflow portion 14 into the final settling basin P. The plurality of sewage slope plates 20 are arranged so that adjacent sewage slope plates 20 face each other and are parallel to each other.

Specifically, as shown in FIG. 3, the plurality of sewage inclined plates 20 include a first surface 20a of one of the adjacent sewage inclined plates 20 and the other sewage inclined plate 20. The second surface 20b of the above is arranged so as to face each other.

As shown in FIGS. 1 to 3, each of the sewage inclined plates 20 is inclined so as to be located on the inflow portion 14 side as it goes upward, and the pair of upper frames 21, the pair of lower frames 22, and the pair of lower frames 22 are inclined. It is supported by a plurality of support rods 23. As shown in FIG. 3, the sewage inclined plate 20 is arranged so that the upper end portion 20i is located closer to the inflow portion 14 than the lower end portion 20j.

Further, in the side view, the angle θa formed by the sewage inclined plate 20 and the arrow D direction (corresponding to the horizontal direction in the present embodiment) is preferably 10 degrees or more and 70 degrees or less, and 60 degrees is particularly preferable. The angle θb formed by the sewage inclined plate 20 and the vertical direction G is preferably set to 20 degrees or more and 80 degrees or less, and particularly preferably 30 degrees.

Within the above range, the effective sedimentation area of the solid-liquid separation system can be secured.

Sludge trapping treatment is performed on the second surface 20b of the sewage inclined plate 20 shown in FIG. 5 (a). Here, the sludge trapping treatment is a treatment for making the second surface 20b of the sewage inclined plate 20 in a state where sludge easily stays so that the sludge in the water to be treated does not flow out from the final settling basin P. For example, by increasing the roughness of the surface of the inclined plate and forming unevenness in the direction along the movement of the sludge along the surface or in the direction orthogonal to the surface, the sludge easily adheres to the surface of the inclined plate. It can, but is not limited to. The method for roughening the surface is not particularly limited, but it may be mechanically processed by, for example, sandblasting, or it may be finely etched with a predetermined chemical or a mold with a predetermined surface roughness. It may be press working or the like. Further, the capture process may not be applied to the entire second surface 20b.

The first surface 20a on the opposite side of the second surface 20b is preferably a flat surface so that sludge can easily slide down.

The inclined plate 20 for sewage can be produced by deformed extrusion molding, injection molding, or the like, but extrusion molding is preferable.

Further, the second surface 20b of the sewage inclined plate 20 is provided with a groove 33 along each of the first end portion 20c and the second end portion 20d. A hook hole 33b is formed in the groove 33, and the hook 24 described above is mounted in the hook hole 33b. The sewage inclined plate 20 is attached to the support rod 23 of the inclined plate device 10 by the hook 24 attached to the hook hole 33b. Further, a ridge portion 33a facing the groove portion 33 is formed on the first surface 20a.

(Short circuit prevention plate 18)
The short-circuit flow prevention plate 18 suppresses unevenness in the amount of water flowing into the inclined plate device 10.

The short-circuit flow prevention plate 18 is a plate-shaped member. The short-circuit flow prevention plate 18 is arranged below the inclined plate device 10.

The material of the short-circuit flow prevention plate 18 is preferably, for example, SUS304, but is not limited to this. The material of the short-circuit flow prevention plate 18 is preferably, for example, a thermoplastic resin or the like, specifically, a vinyl resin such as polyvinyl chloride, a carbonate resin such as polycarbonate, an ester resin such as polyethylene terephthalate, polymethyl methacrylate or the like. It may be an acrylic resin, an olefin resin such as polypropylene or polyethylene, a styrene resin such as ABS, a copolymer or a mixed resin thereof, or a thermosetting resin such as an epoxy resin or an unsaturated polyester resin. It may be metal, ceramic, wood, rubber, or the like.

FIG. 6A is a plan view of the short-circuit flow prevention plate 18. The size of the short-circuit flow prevention plate 18 is not particularly specified, and it may be installed so as to cover the area where the inflow water is concentrated. In order to suppress the bias of the inflow water, it is preferable not to install the short-circuit flow prevention plate 18 on the lower side of the outflow portion 15 side (rear stage portion) of the inclined plate device 10 in which the flow velocity becomes slow. The short-circuit flow prevention plate 18 has a plurality of openings 18a. The shape and size of the opening 18a are not limited, but the opening ratio (%) of the opening 18a in the short-circuit flow prevention plate 18 is preferably 5 to 90%, preferably 15 to 50%. Is more preferable. Here, the aperture ratio (%) is calculated by the following mathematical formula (1).

Aperture ratio (%) = (sum of opening area / apparent area of short-circuit flow prevention plate) x 100 ... (1)
The total area of the openings is the flat area per opening x the number of openings. The apparent area of the short-circuit flow prevention plate is the area of the short-circuit flow prevention plate when the opening is not formed.

As an example, the short-circuit flow prevention plate 18 shown in FIG. 6A has a plurality of circular openings 18a. The opening ratio of the opening 18a in the short-circuit flow prevention plate 18 is 40%, and the openings 18a are arranged in a staggered manner at 60 degrees. As will be described later, the short-circuit flow prevention plate 18 has an edge portion 18b in which the edges of the two opposing sides are bent downward. Since the edge portion 18b of the short-circuit flow prevention plate 18 comes into contact with the mounting member 19 described later, the edge portion 18b is not included in the apparent area of the short-circuit flow prevention plate in detail.

As shown in FIG. 3, the short-circuit flow prevention plate 18 is arranged along the arrow D direction. It can be said that the short-circuit flow prevention plate 18 is arranged along the horizontal direction. Further, it can be said that the short-circuit flow prevention plate 18 is arranged along the lower end portions 20j of the plurality of sewage inclined plates 20.

Further, as shown in FIG. 3, the short-circuit flow prevention plate 18 is arranged on the outflow portion 15 side of the blocking plate 11 and above the lower end 11e of the blocking plate 11. In addition, the height may be the same as 11e, and any position can be taken as long as the short-circuit flow can be suppressed.

The short-circuit flow prevention plate 18 is installed so as to include the range of the portion where the inflow water of the inclined plate device 10 is concentrated, and is arranged in the vicinity of the blocking plate 11, for example.

As shown in FIG. 4A, in the width direction F, the short-circuit flow prevention plate 18 is provided so as to face the entire area of the inclined plate device 10. It can be said that the short-circuit flow prevention plate 18 is arranged so as to cover the entire inclined plate device 10 from below in the width direction F. In the present embodiment, a plurality of short-circuit flow prevention plates 18 are arranged along the width direction F, but the number is not limited to a plurality and may be one.

In the example shown in FIG. 4B, three short-circuit flow prevention plates 18 are arranged along the width direction F, and rows of sewage inclined plates 20 are arranged above each short-circuit flow prevention plate 18.

In the present embodiment, as shown in FIG. 4B, a part of the short-circuit flow prevention plate 18 is arranged so as to overlap the plurality of inclined plates 20 for sewage in a plan view.

As a result, it becomes difficult for water to flow between the sewage inclined plates 20 arranged above the short-circuit flow prevention plate 18. Therefore, for example, by arranging the short-circuit flow prevention plate 18 in the front stage portion of the inclined plate device 10 in which the inflow water tends to concentrate, it becomes difficult for water to flow into the front stage portion and the flow rate flowing into the rear stage portion can be increased. The bias of the flow rate can be suppressed.

Further, in the present embodiment, for example, in the short-circuit flow prevention plate 18, in the direction of arrow D, as shown in FIG. 3, a part of the sewage inclined plates 20 among the plurality of sewage inclined plates 20 is extended downward. Arranged to intersect in case. From the viewpoint of alleviating the concentration of inflow water and preventing short-circuit flow, the short-circuit flow prevention plate 18 intersects when the sewage inclined plate 20 arranged closest to the flow blocking plate 11 is extended downward. It is more preferable that they are arranged in such a manner. In FIG. 3, an extension line L extending downward from the sewage inclined plate 20 is shown in a side view.

In the present embodiment, as shown in FIG. 3, a part of the sewage inclined plate 20 that intersects the short-circuit flow prevention plate 18 when stretched is from the sewage inclined plate 20 located closest to the blocking plate 11. It corresponds to up to the fourth four inclined plates 20 for sewage, but it is not limited to four, and it is sufficient if it can be arranged in a place where the amount of inflowing water is large.

It can be said that the short-circuit flow prevention plate 18 is arranged so as to block the flow path (between the adjacent sewage inclined plates 20) formed by a part of the sewage inclined plates 20 from the lower side.

As a result, the short-circuit flow prevention plate 18 can be arranged at a place where the inflow water is concentrated.

Further, assuming that the distance between the blocking plate 11 and the lower end portion 20j of the sewage inclined plate 20 arranged closest to the blocking plate 11 is W, the short-circuit flow prevention plate 18 faces at least a part of the spacing W. It is preferable that they are arranged in such a manner. In addition, when the short-circuit flow prevention plate 18 faces at least a part of the interval W, it can be said that the short-circuit flow prevention plate 18 is arranged so as to block at least a part of the interval W in a plan view. Further, it is more preferable that the short-circuit flow prevention plates 18 are arranged so as to face each other over the entire interval W as much as possible.

As a result, it is possible to suppress a short-circuit flow toward the outflow portion 15 through the interval W, passing above the inclined plate device 10, without flowing between the inclined plates 20 for sewage.

Examples of other short-circuit flow prevention plates are also shown below. In the examples shown in FIGS. 6 (b) to 9 (b), the edge portion is not shown.

The short-circuit flow prevention plate 118 shown in FIG. 6B has a plurality of circular openings 118a. The opening ratio of the opening 118a in the short-circuit flow prevention plate 118 is 40%. In the short-circuit flow prevention plate 118, the openings 118a are arranged in a staggered manner.

The short-circuit flow prevention plate 218 shown in FIG. 7A has a plurality of circular openings 218a. The opening ratio of the opening 218a in the short-circuit flow prevention plate 218 is 38%. In the short-circuit flow prevention plate 218, the openings 218a are arranged in parallel.

The short-circuit flow prevention plate 318 shown in FIG. 7B has a plurality of circular openings 318a. The opening ratio of the opening 318a in the short-circuit flow prevention plate 318 is 25%. In the short-circuit flow prevention plate 218, the openings 218a are arranged in a 60-degree staggered pattern. The opening 318a of the short-circuit flow prevention plate 318 has the same size as the opening 18a of the short-circuit flow prevention plate 18, but the pitch between the openings is longer.

The short-circuit flow prevention plate 418 shown in FIG. 8A has a plurality of oblong hole-shaped openings 418a. The opening ratio of the opening 418a in the short-circuit flow prevention plate 418 is 40%. In the short-circuit flow prevention plate 418, the openings 418a are arranged in a staggered pattern.

The short-circuit flow prevention plate 518 shown in FIG. 8B has a plurality of oblong hole-shaped openings 518a. The opening ratio of the opening 518a in the short-circuit flow prevention plate 518 is 44%. In the short-circuit flow prevention plate 518, the openings 518a are arranged in a staggered pattern.

The short-circuit flow prevention plate 618 shown in FIG. 9A has a plurality of hexagonal openings 618a. The opening ratio of the opening 618a in the short-circuit flow prevention plate 618 is 40%. In the short-circuit flow prevention plate 618, the openings 618a are arranged in a 60-degree staggered pattern.

The short-circuit flow prevention plate 718 shown in FIG. 9B has a plurality of square hole-shaped openings 718a. The opening ratio of the opening 718a in the short-circuit flow prevention plate 718 is 40%. In the short-circuit flow prevention plate 718, the openings 718a are arranged in parallel.

(Mounting member 19)
The mounting member 19 mounts the short-circuit flow prevention plate 18 to the inclined plate device 10. FIG. 10A is a side view of the mounting member 19, and FIG. 10B is a view of the mounting member 19 viewed along the direction of arrow D.

The mounting member 19 is mounted on the lower frame 22. The mounting member 19 includes a first metal fitting 41, a second metal fitting 42, and a third metal fitting 43. The first metal fitting 41 is a long plate-shaped member. The second metal fitting 42 is a long plate-shaped member, and is formed longer than the first metal fitting 41.

The first metal fitting 41 is formed with two through holes 41a arranged vertically. The second metal fitting 42 is formed with two through holes 42a arranged vertically and a long hole 42b arranged below the two through holes 42a and long in the vertical direction.

The first metal fitting 41 and the second metal fitting 42 are attached to the lower frame 22 so as to face each other in the width direction F and sandwich the lower frame 22 via the spacer 50.

The first metal fitting 41 and the second metal fitting 42 are arranged so that the two through holes 41a and the two through holes 42a each face each other. One through hole 41a, 42a is located above the lower frame 22, and the other through hole 41a, 42a is located below the lower frame 22. The spacer 50 is arranged between the first metal fitting 41 and the second metal fitting 42 on the upper side and the lower side of the lower frame 22. A through hole 50a is formed in the spacer 50. The through hole 50a is arranged so as to face the through hole 41a and the through hole 42a.

Bolts 44 are inserted into each of the two sets of through holes 41a, 42a, and 50a, and nuts 45 are fitted into the bolts 44. In this way, the mounting member 19 is connected to the inclined plate device 10 by sandwiching the lower frame 22 between the first metal fitting 41 and the second metal fitting 42.

The third metal fitting 43 has a connecting portion 431 connected to the second metal fitting 42 and an arranging portion 432 for arranging the short-circuit flow prevention plate 18. The connecting portion 431 has a plate shape long in the vertical direction, and has through holes 431a and 431b at the top and bottom. The through hole 431a is formed in the upper part of the connecting portion 431. A through hole 431a and an elongated hole 42b are inserted into the bolt 46, and a nut 47 is fitted at the tip thereof.

The arrangement portion 432 has a plate shape and is fixed to the lower end of the connection portion 431. The arranging portion 432 is arranged perpendicular to the connecting portion 431. The third metal fitting 43 is formed in an inverted T shape along the arrow D direction.

The edge 18b of the short-circuit flow prevention plate 18 is bent downward. The short-circuit flow prevention plate 18 is arranged on the mounting member 19 so that the edge portion 18b is arranged on the upper surface of the arranging portion 432. A through hole 18c is formed in the edge portion 18b, a bolt 48 is arranged by inserting the through hole 18c and the through hole 431b of the third metal fitting 43, and a nut 49 is fitted to the tip of the bolt 48. .. As a result, the short-circuit flow prevention plate 18 is fixed to the third metal fitting 43.

Further, by loosening the nut 47 and sliding the bolt 46 through which the through hole 431a is inserted in the elongated hole 42b in the vertical direction (see the arrow), the third metal fitting 43 is in the vertical direction with respect to the second metal fitting 42. The position can be adjusted. Thereby, the position of the short-circuit flow prevention plate 18 from the inclined plate device 10 can be adjusted. The second metal fitting 42 and the third metal fitting 43 correspond to an example of the adjusting mechanism.

The mounting member 19 is configured such that the distance H (see FIG. 3) between the lower end portion 20j of the sewage inclined plate 20 and the short-circuit flow prevention plate 18 can be adjusted between 0 and 1000 mm.

Since the short-circuit flow prevention plate 18 arranged in this way acts as a resistance to the water flow, it becomes difficult for water to flow between the sewage inclined plates 20 arranged above the short-circuit flow prevention plate 18. Therefore, for example, by arranging the short-circuit flow prevention plate 18 in the front stage portion of the inclined plate device 10 in which the inflow water is concentrated, it becomes difficult for water to flow into the front stage portion and the flow rate flowing into the rear stage portion can be increased.

That is, by appropriately arranging the plate-shaped member below the sewage inclined plate 20 in which the inflow water is larger than the others, the flow rate can be distributed as evenly as possible and the bias of the flow rate can be suppressed.

Further, by arranging the short-circuit flow prevention plate 18 so as to face at least a part of the distance W between the blocking plate 11 and the lower end portion 20j of the sewage inclined plate 20 arranged on the most side of the blocking plate 11. It is possible to suppress a short-circuit flow toward the outflow portion 15 through the interval W and above the inclined plate device 10 without flowing between the inclined plates 20 for sewage.

<Installation method>
Hereinafter, a method of attaching the sewage inclined plate 20 according to the embodiment of the present invention to the support rod 23 will be described.

11 and 12 are perspective views showing the attachment of the sewage inclined plate 20 to the support rod 23.

As shown in FIG. 11, the sewage inclined plate 20 is passed between the support rods 23 from below the lower frame 22, and as shown in FIG. 12, four hooks 24 are locked to the support rods 23. It is attached.

By attaching from below in this way, the sewage inclined plate 20 can be arranged on the support rod 23 between the pair of upper frames 21 and the support rod 23 between the pair of lower frames 22.

Next, as shown in FIG. 10, the short-circuit flow prevention plate 18 is arranged on the arrangement portion 432 after the attachment member 19 is attached to the lower frame 22. Then, the short-circuit flow prevention plate 18 is fixed to the mounting member 19 with the bolt 48 and the nut 49. The mounting member 19 may be mounted on the lower frame 22 in advance.

<Other embodiments>
Although the embodiments according to the present invention have been described above, the present invention is not limited to the above embodiments and can be appropriately modified without departing from the spirit of the present invention.

(A)
The sewage inclined plate 20 of the above-described embodiment may be divided into a plurality of inclined plates. In that case, a connecting member may be provided to connect between the plurality of sewage inclined plates 20.

(B)
In the above embodiment, the sewage slope plate 20 is supported by the support rod 23 by the hook 24, but the hook is not limited to the hook 24, and a plurality of sewage slope plates 20 can be arranged side by side. For example, the support method is not limited.

(C)
In the above embodiment, one short-circuit flow prevention plate 18 covers from below in the direction of arrow D from the interval W to the part of the sewage inclined plate 20 on the blocking plate 11 side, but the present invention is limited to this. It may be divided into a plurality of short-circuit flow prevention plates 18. Further, a gap may be provided in a plurality of short-circuit flow prevention plates.

(D)
In the above embodiment, the short-circuit flow prevention plate 18 is provided with the edge portion 18b, but the edge portion 18b may not be provided. In that case, for example, both the arrangement portion 432 and the short-circuit flow prevention plate 18 may be provided. Through holes may be formed in the vertical direction and fixed with bolts and nuts.

(E)
In the above embodiment, the short-circuit flow prevention plate 18 is arranged so as to face both the interval W and the part of the sewage inclined plate 20, but the interval W or a part of the sewage inclined plate 20 is arranged. Only one of the 20 may be arranged so as to face each other.

(F)
In the above embodiment, the short-circuit flow prevention plate 18 is attached to the inclined plate device 10 via the mounting member 19, but the present invention is not limited to this, and the short-circuit flow is applied to the lower end portion 20j of the sewage inclined plate 20. The prevention plate 18 may be connected, or the short-circuit flow prevention plate 18 may be connected to the lower end of the flow blocking plate 11.

The solid-liquid separation system of the present invention exerts an effect of suppressing the unevenness of the flow rate in a plurality of inclined plates without reducing the effective sedimentation area, and is useful as a final sedimentation basin of a sewage treatment facility.

(Embodiment 2)
The solid-liquid separation system of the second embodiment according to the present invention will be described below.

(Embodiment 2a)
The solid-liquid separation system 1100 of the second embodiment 2a will be described below.

<Composition>
(Solid-liquid separation system 1100)
FIG. 13 is a diagram showing the solid-liquid separation system 1100 of the present embodiment. The solid-liquid separation system 1100 of the present embodiment is applied to the solid-liquid separation of the water to be treated W in the final settling basin P of the sewage treatment plant.

As shown in FIG. 13, the solid-liquid separation system 1100 includes a final settling basin P (an example of a settling basin), an inclined plate device 1010, an inflow portion blocking plate 1011 (an example of a blocking plate), and an overflow dam. It includes a 1012, a water channel 1013, an inflow section 1014, an outflow section 1015, a sludge scraper 1016, and a sludge hopper 1017.

In the inflow section 1014, raw water (water to be treated W) flows into the final settling basin P. The outflow portion 1015 is provided on the opposite side of the inflow portion 1014 in the final settling basin P, and the purified water W to be treated flows out from the final settling basin P.

The inclined plate device 1010 is arranged in a portion downstream from the substantially central portion of the final settling basin P (outflow portion 1015 side). The inclined plate device 1010 has a plurality of inclined plates 1020 for sewage. The plurality of sewage inclined plates 1020 are arranged side by side from the upstream side to the downstream side with the water surface side tilted toward the inflow portion 1014 side.

The inclined plate device 1010 is supported so that the water to be treated W sinks to a predetermined depth from the water surface WS and a predetermined lower space 1042 is secured between the inclined plate device 1010 and the bottom surface PB of the final settling basin P. This support may be suspended from a girder or the like, or may be placed on a support (not shown), for example. The details of the inclined plate device 1010 will be described in detail later.

The inflow portion blocking plate 1011 blocks the flow of the water to be treated W from the water surface to a predetermined depth to the downstream side (outflow portion 1015 side).

The overflow weir 1012 is arranged near the surface of the water to be treated W on the downstream side (outflow portion 1015 side) of the inflow portion blocking plate 1011. The overflow weir 1012 is formed along the direction from the upstream side to the downstream side.

The waterway (trough) 1013 is formed by being surrounded by the overflow weir 1012 and is connected to the outflow portion 1015. The overflow weir 1012 is not limited to the overflow weir 1012, and a hole may be formed in the pipe.

Here, in the final settling pond P, the space from the inflow portion 1014 to the inflow portion blocking plate 1011 is designated as the upstream space 1041, the space below the inclined plate device 1010 is designated as the lower space 1042, and the space below the upstream space 1041. The space in which water flows into the side space 1042 is referred to as an inflow path 1043. The inflow path 1043, which will be described later, is formed between the second surface 1020b (described later) and the bottom surface PB of the sewage inclined plate 1020P.

The water W to be treated that has flowed into the final settling basin P from the inflow portion 1014 passes through the upstream space 1041 and is blocked by the inflow portion blocking plate 1011 in the water flow direction (arrow D direction (an example of a predetermined direction)). Descends and flows into the lower space 1042 through the inflow path 1043. The water to be treated W that has flowed into the lower space 1042 becomes an upward flow J toward the water channel 1013, and flows in from the bottom surface 1010a of the inclined plate device 1010 to the sewage inclined plate 1020 and rises.

Then, the sludge of the water to be treated W collides with the second surface 1020b of the sewage inclined plate 1020 while passing through the inclined plate device 1010 and is captured or settled, and the first surface 1020a of the sewage inclined plate 1020 is captured. The water to be treated W is purified by settling on the top. The sludge settled on the first surface 1020a of the sewage inclined plate 1020 falls by its own weight as it is deposited.

The sludge scraper 1016 is arranged near the bottom surface of the final settling basin P. Settled sludge M is deposited near the bottom surface of the final settling basin P. The accumulated sludge M is collected in the sludge hopper 1017 by rotating the sludge scraper 1016 clockwise on FIG. 13, and is discharged. The sludge scraper 1016 passes near the water surface on the upstream side of the inflow portion blocking plate 1011 and also scrapes suspended matter.

The sludge hopper 1017 is formed on the bottom surface of the final settling basin P near the inflow portion 1014.

(Inclination plate device 1010)
FIG. 14 is a perspective view schematically showing a part of the configuration of the inclined plate device 1010. FIG. 15 is a side view showing the inclined plate device 1010 and the inflow portion blocking plate 1011.

As shown in FIGS. 14 and 15, the tilt plate device 1010 includes a plurality of tilt plates for sewage 1020, a pair of upper frames 1021, a pair of lower frames 1022, a plurality of support rods 1023, and a plurality of hooks. It has a 1024 and a plurality of upper and lower frames 1025.

The pair of upper frames 1021 are arranged along the direction D (an example of a predetermined direction) from the inflow portion 1014 toward the outflow portion 1015. The pair of upper frames 1021 are arranged parallel to each other.

The pair of lower frames 1022 are arranged along the direction D from the inflow portion 1014 toward the outflow portion 1015. The pair of lower frames 1022 are arranged parallel to each other. The pair of upper frames 1021 are arranged closer to the water surface than the pair of lower frames 1022. The upper frame 1021 and the lower frame 1022 arranged vertically on one side and the other side of the width direction F are a plurality of upper and lower frames arranged along the vertical direction G at the upstream end and the downstream end thereof. It is connected by a frame 1025 (see FIG. 15). The vertical direction G includes a vertically upward direction and a vertically downward direction. The vertical upward direction is indicated by Gu in FIGS. 19A to 19C described later, and the vertical downward direction is indicated by Gd.

The plurality of support rods 1023 are erected in parallel between the pair of upper frames 1021 and parallel to each other between the pair of lower frames 1022.

The sewage tilt plate 1020 is tilted with respect to the pair of upper frames 1021 and the pair of lower frames 1022, and is attached to the pair of upper and lower support rods 1023.

FIG. 16 is a schematic cross-sectional view taken along the line between AA'in FIG. FIG. 17 is a diagram showing a state in which the inflow portion blocking plate 1011, the suspension bolt 1033, and the girder member 1034 are removed from FIG.

As shown in FIGS. 16 and 17, a plurality of sewage inclined plates 1020 (three in the figure) are arranged along the width direction F of the final settling basin P. In this case, for example, the upper frame 1021 and the lower frame 1022 located on the right side of the sewage inclined plate 1020 arranged on the leftmost side in FIGS. 16 and 17 are located on the left side of the sewage inclined plate 1020 in the middle. It may also serve as the upper frame 1021 and the lower frame 1022. Further, the upper frame 1021 and the lower frame 1022 located on the left side of the sewage inclined plate 1020 arranged on the rightmost side in FIGS. 16 and 17 are the upper frame 1021 located on the right side of the sewage inclined plate 1020 in the middle. And may also serve as the lower frame 1022.

As shown in FIG. 17, the upper frame 1021 is supported by the hanging bolt 1031 from above, and the hanging bolt 1031 is fixed to the girder member 1032 arranged along the width direction F. The girder member 1032 is fixed to the opposite wall surface Ps of the final settling basin P. Further, a plurality of girder members 1032 are arranged along the direction D as shown in FIG. With such a configuration, the inclined plate device 1010 is supported so as to sink from the water surface of the water to be treated W to a predetermined depth and to secure a predetermined space between the inclined plate device 1010 and the bottom surface PB of the final settling basin P. There is. These hanging bolts 1031 and girder member 1032 correspond to an example of the first support portion.

(Sewage tilt plate 1020)
The sewage inclined plate 1020 is formed of a substantially square member. As the material of the inclined plate 1020 for sewage, PVC (polyvinyl chloride), particularly hard vinyl chloride, is preferable, but the material is not limited thereto. The material of the inclined plate is, for example, a thermoplastic resin, for example, a vinyl resin such as polyvinyl chloride, a carbonate resin such as polycarbonate, an ester resin such as polyethylene terephthalate, an acrylic resin such as polymethyl methacrylate, polypropylene, polyethylene, etc. It may be an olefin resin, a styrene resin such as ABS, a copolymer or a mixed resin thereof, or a thermosetting resin such as an epoxy resin or an unsaturated polyester resin, and may be a metal, ceramic, or the like. It may be wood, rubber, or the like.

The inclined plate 1020 for sewage can be produced by deformed extrusion molding, injection molding, etc., but extrusion molding is preferable.

A plurality of inclined plates for sewage 1020 are arranged side by side so as to be inclined along the length direction (direction D) of the upper frame 1021 and the lower frame 1022. The inclined plate device 1010 is installed in the final settling basin P of the sewage treatment plant with the lower frame 1022 facing the bottom surface PB side of the final settling basin P. The second surface 1020b (described later) of the sewage inclined plate 1020 is directed toward the bottom surface PB side of the final settling basin P.

The sewage inclined plate 1020 is attached by being locked to the support rods 1023 arranged vertically by a plurality of hooks 1024.

FIG. 18A is a plan view showing the second surface 1020b side of the sewage inclined plate 1020. FIG. 18B is a plan view showing the first surface 1020a side of the sewage inclined plate 1020.

As shown in FIGS. 18A and 18B, the sewage inclined plate 1020 has a first surface 1020a, a second surface 1020b, an upper end 1020i, a lower end 1020j, a first end 1020c, and a first surface. It has two ends, 1020d, and.

When the sewage tilt plate 1020 is attached to the pair of upper frames 1021, the pair of lower frames 1022, and the support rod 1023 described above, as shown in FIG. 14, the upper end 1020i and the lower end 1020j are the support rods 1023. It is arranged almost parallel to. Further, the upper end 1020i is arranged above the upper frame 1021, and the lower end 1020j is arranged below the lower frame 1022.

The first end 1020c and the second end 1020d are arranged so as to be inclined from the upper frame 1021 toward the lower frame 1022.

The plurality of inclined plates for sewage 1020 are arranged side by side along the direction D in which the water to be treated flows from the inflow portion 1014 into the final settling basin P. The plurality of sewage slope plates 1020 are arranged so that adjacent sewage slope plates 1020 face each other and are parallel to each other.

Specifically, as shown in FIG. 15, the plurality of sewage slope plates 1020 are the first surface 1020a of one of the adjacent sewage slope plates 1020 and the other sewage slope plate 1020. The second surface 1020b of the above is arranged so as to face each other. Further, the positions of the lower ends 1020j of the plurality of sewage inclined plates 1020 in the vertical direction G are substantially the same.

Here, the virtual surface connecting the lower end 1020j is referred to as the bottom surface 1010a of the inclined plate device 1010. In FIG. 15, the bottom surface 1010a is indicated by a chain double-dashed line. In the present embodiment, since the positions of the lower ends 1020j of the plurality of sewage inclined plates 1020 in the vertical direction are substantially the same, the bottom surface 1010a is formed substantially horizontally, but the present invention is not limited to this. When the positions of the lower ends 1020j of the plurality of sewage inclined plates 1020 in the vertical direction are different, the bottom surface 1010a is set according to the position of the lowest position 1020j.

As shown in FIGS. 13 to 15, each sewage inclined plate 1020 is inclined so as to be located on the inflow portion 1014 side as it goes upward, and a pair of upper frames 1021, a pair of lower frames 1022, and a plurality of sewage inclined plates 1020. It is supported by the support rod 1023 and a plurality of upper and lower frames 1025. As shown in FIG. 15, the sewage inclined plate 1020 is arranged so that the upper end 1020i is located closer to the inflow portion 1014 than the lower end 1020j.

Further, as shown in FIG. 15, the sewage inclined plate 1020 (indicated as 1020P) arranged on the most upstream side (arranged on the inflow portion blocking plate 1011 side) is arranged between the upper and lower frames 1025. It is supported by being locked by a hook 1024 to a support rod 1023 arranged between the support rod 1023 and the lower frame 1022.

Sludge trapping treatment is performed on the second surface 1020b of the sewage inclined plate 1020 shown in FIG. 18A. Here, the sludge trapping treatment is a treatment for making the second surface 1020b of the sewage inclined plate 1020 into a state in which sludge easily stays so that the sludge in the water to be treated does not flow out from the final settling basin P. For example, by increasing the roughness of the surface of the inclined plate and forming unevenness in the direction along the movement of the sludge along the surface or in the direction orthogonal to the surface, the sludge easily adheres to the surface of the inclined plate. It can, but is not limited to. The method for roughening the surface is not particularly limited, but it may be mechanically processed by, for example, sandblasting, or it may be finely etched with a predetermined chemical or a mold with a predetermined surface roughness. It may be press working or the like. Further, the capture process may not be applied to the entire second surface 1020b.

It is preferable that the first surface 1020a on the opposite side of the second surface 1020b is a flat surface so that sludge can easily slide off.

Further, the second surface 1020b of the sewage inclined plate 1020 is provided with a groove portion 1020e along each of the first end 1020c and the second end 1020d. A hook hole 1020eb is formed in the groove portion 1020e, and the hook 1024 described above is mounted in the hook hole 1020eb. The sewage tilt plate 1020 is attached to the support rod 1023 of the tilt plate device 1010 by the hook 1024 mounted in the hook hole 1020 eb. Further, a ridge portion 1020f facing the groove portion 1020e is formed on the first surface 1020a.

As shown in FIG. 15, the position of the hook hole 1020eb on the upper end 1020i side of the sewage inclined plate 1020P arranged on the most inflow portion blocking plate 1011 side is different from the position of the other sewage inclined plate 1020P. It is provided below the other sewage slope plate 1020. In FIGS. 18 (a) and 18 (b), the hook hole 1020eb ′ on the upper end 1020i side of the sewage inclined plate 1020P is indicated by a two-dot chain line leader line.

In the side view of FIG. 15, the angle θa formed by at least the sewage inclined plate 1020P and the arrow D direction (corresponding to the horizontal direction in the present embodiment) is preferably 20 degrees or more and 70 degrees or less, preferably 60 degrees. Especially preferable. In this embodiment, all the inclined plates for sewage 1020 are arranged in parallel with each other. Within this range, the effective sedimentation area of the solid-liquid separation system can be secured.

Further, the length L between the upper end 1020i and the lower end 1020j of the sewage inclined plate 1020P can be set to 100 to 2000 mm. In the present embodiment, the sewage slope plate 1020P and the other sewage slope plate 1020 are formed to have the same size, but may be different. The second surface 1020b of the sewage inclined plate 1020P corresponds to an example of the inclined portion of the water flow guide surface.

(Inflow part blocking plate 1011)
As shown in FIG. 15, the inflow portion blocking plate 1011 is provided on the upstream side (inflow portion 1014 side) of the inclined plate device 1010 and at a substantially central portion of the final settling basin P. The inflow portion blocking plate 1011 is arranged so that the main surface is substantially perpendicular to the direction of the water flow flowing in from the inflow portion 1014. The surface of the inflow portion blocking plate 1011 on the inflow portion 1014 side is 1011a. The water flow blocked by the surface 1011a of the inflow portion blocking plate 1011 becomes a downward flow and is guided to the lower side of the inclined plate device 1010.

As shown in FIG. 16, the inflow portion blocking plate 1011 is formed so that the length in the width direction F is substantially the same as the length in the width direction F of the final settling basin P.

The lower end 1011e of the inflow portion blocking plate 1011 is located above the upper end 1020i of the sewage inclined plate 1020P arranged on the most upstream side (which can also be said to be the inflow portion 1014 side). In order to smoothly guide the water flow to the lower side of the inclined plate device 1010, the lower end 1011e of the inflow portion blocking plate 1011 and the upper end of the sewage inclined plate 1020P arranged on the most upstream side (which can be said to be the inflow portion 1014 side). It is preferable that the distance from the 1020i is narrow.

The lower end 1011e of the inflow portion blocking plate 1011 and the upper end 1020i of the sewage inclined plate 1020P are not mechanically connected. Since the configuration is not connected, the sewage inclined plate 1020P is less likely to directly receive the energy when a vibration occurs, so that damage can be avoided.

As shown in FIG. 16, the inflow portion blocking plate 1011 is supported by the suspension bolt 1033, and the suspension bolt 1033 is fixed to the girder member 1034 arranged along the width direction F. The girder member 1034 is fixed to the opposite wall surface Ps of the final settling basin P. With such a configuration, the inflow portion blocking plate 1011 can be supported vertically above the upper end 1020i of the sewage inclined plate 1020P. Further, the hanging bolt 1033 and the girder member 1034 correspond to an example of the second support portion.

The material of the inflow portion blocking plate 1011 is most preferably PVC (polyvinyl chloride), but the material is not limited to this. The material of the inflow portion blocking plate 1011 is, for example, a thermoplastic resin, for example, a vinyl resin such as polyvinyl chloride, a carbonate resin such as polycarbonate, an ester resin such as polyethylene terephthalate, an acrylic resin such as polymethyl methacrylate, and the like. It may be an olefin resin such as polypropylene or polyethylene, a styrene resin such as ABS, a copolymer or a mixed resin thereof, or a thermosetting resin such as an epoxy resin or an unsaturated polyester resin. It may be metal, ceramic, wood, rubber or the like.

In the second embodiment 2a, the water to be treated W flowing from the inflow portion 1014 is guided to the lower space 1042 of the inclined plate device 1010 by the inflow portion blocking plate 1011 and the above-mentioned sewage inclined plate 1020P.

(Inflow of water to be treated into the lower space)
FIG. 19A is a side view showing the water flow in the vicinity of the inflow portion blocking plate 1011 and the sewage inclined plate 1020P.

In the second embodiment 2a, the water W to be treated that has flowed in from the inflow portion 1014 flows through the upstream space 1041, and the flow is blocked by the surface 1011a of the inflow portion blocking plate 1011 and descends. The descended water to be treated W flows toward the bottom surface PB along the inclination of the second surface 1020b of the endmost sewage inclined plate 1020P, and flows into the lower space 1042 under the inclined plate device 1010. The surface 1011a on the inflow portion 1014 side of the inflow portion blocking plate 1011 and the second surface 1020b of the sewage inclined plate 1020P at the end on the inflow portion 1014 side correspond to an example of the water flow guide surface.

The water flow guide surface in the present invention is composed of a blocking plate, a part of an inclined plate, and other parts used in a lateral flow type settling basin. The water flow guide surface forms a flow path for the water flow flowing from the lower side to the upper side of the inclined plate device to flow into the lower side of the inclined plate device 1010. Then, the resistance of the water flow can be reduced by the water flow guide surface, and the occurrence of a short-circuit flow can be suppressed. The water flow guide surface is a surface that can reduce the resistance of the water flow and suppress the occurrence of a short-circuit flow.

As shown in FIG. 19A, the inflow path 1043, which is a space in which the water to be treated W flows from the upstream space 1041 into the lower space 1042, includes a bottom surface PB and a second surface 1020b of the most upstream sewage inclined plate 1020P. It is formed by both wall surfaces Ps. In FIG. 19A, the sludge scraper 1016 is not shown for the sake of clarity.

In the side view of FIG. 19A, the surface lowered from the inflow portion blocking plate 1011 to the bottom surface PB in the vertical direction G is referred to as S1, and the surface lowered from the lower end 1020j of the sewage inclined plate 1020P to the bottom surface PB in the vertical direction G is referred to as S2. Then, the above-mentioned upstream space 1041 corresponds to a space on the upstream side of the surface S1 (which can also be said to be a space on the inflow portion 1014 side). Further, the above-mentioned lower space 1042 corresponds to a space on the downstream side of the surface S2 (which can also be said to be a space on the outflow portion 1015 side). The inflow path 1043 corresponds to the space between the surfaces S1 and S2.

The upper end 1020i of the sewage inclined plate 1020P is arranged near the lower end 1011e of the inflow portion blocking plate 1011, and the upper end 1020i of the sewage inclined plate 1020P is inclined so as to be located closer to the inflow portion blocking plate 1011 than the lower end 1020j. ing. Therefore, the height of the inflow path 1043 gradually decreases in the vertical direction from the upstream space 1041 toward the lower space 1042 (in the direction of arrow D), and the flow path area gradually decreases.

<Effect>
FIG. 19B is a diagram showing the positional relationship between the conventional inflow portion blocking plate 11011 and the inclined plate device 11010. In FIG. 19B, the inflow portion blocking plate 11011 arranged along the vertical direction G, the inflow portion lower blocking plate 11012 installed horizontally from the lower end 11011e of the inflow portion blocking plate 11011 toward the downstream side, and the inflow An inclined plate device 11010 arranged on the downstream side of the partial blocking plate 11011 is shown.

The inflow portion lower blocking plate 11012 is a member for preventing the water flow from flowing into the space between the inflow portion blocking plate 11011 and the inclined plate device 11010 when the water flow passes through the inflow port 11043. The length of the inflow portion lower blocking plate 11012 is from the lower end 11011e to the inclined plate 11020P arranged in the nearest vicinity. Specifically, the length of the inflow portion lower blocking plate 11012 is until the horizontal position of the downstream end of the inflow portion lower blocking plate 11012 coincides with the horizontal position of the lower end 11020j of the inclined plate 11020P. It is set to the length of.

In FIG. 19B, since the inflow portion lower blocking plate 11012 is installed horizontally from the lower end 11011e toward the downstream side, it is settled and separated on the surface of the inflow portion lower blocking plate 11012 on the Gu side in the vertical upward direction. Suspended material accumulates.

In the conventional configuration as shown in FIG. 19C, the inflow portion lower blocking plate 11013 is installed from the portion of the inflow portion blocking plate 11011 in the range of 100 mm to 500 mm in the vertical upward direction Gu side from the lower end 11011e toward the downstream side. Has been done. The lower blocking plate 11013 of the inflow portion is arranged so as to be inclined so as to approach the bottom surface PB toward the downstream side. The angle formed by the inflow portion blocking plate 11011 and the inflow portion lower blocking plate 11013 is set to 50 ° to 80 °. Therefore, it is possible to promote sliding down of the inflow portion lower blocking plate 11013 on the surface on the Gu side in the vertical upward direction without depositing the suspended substance separated by sedimentation.

The length of the inflow portion lower blocking plate 11013 is up to the inclined plate 11020P arranged closest to the inflow portion blocking plate 11011. Specifically, the length of the inflow portion lower blocking plate 11013 is such that the horizontal position of the downstream end of the inflow portion lower blocking plate 11013 coincides with the horizontal position of the lower end 11020j of the inclined plate 11020P. It is set to the length of.

As shown in FIGS. 19B and 19C, the inflow portion blocking plate 11011 is arranged so as to substantially cover the inclined plate device 11010 in the horizontal direction. The position of the lower end 11011e of the inflow portion blocking plate 11011 in the vertical direction G is set to be equal to or lower than the lower end 11020j of the inclined plate 11020 of the inclined plate device 11010.

The inflow port 11043 that passes when the water to be treated flows from the upstream space 11041 on the upstream side of the inflow portion blocking plate 11011 to the lower space 11042 of the inclined plate device 11010 is the lower end 11011e of the inflow portion blocking plate 11011. It is formed between the bottom surface PB.

In the configuration shown in FIGS. 19B and 19C, when the water to be treated flows from the upstream space 11041 to the lower space 11042, the cross section of the flow path through which the water flow passes is sharply narrowed at the inflow port 11043. Therefore, the flow velocity will increase.

On the other hand, in the solid-liquid separation system 1100 of the present embodiment as shown in FIG. 19A, the second surface is such that the flow path area is gradually reduced between the second surface 1020b and the bottom surface PB of the sewage inclined plate 1020P. Since the 1020b is provided so as to approach the bottom surface PB from the upstream space 1041 toward the lower space 1042, it is possible to suppress an increase in the speed of the water flow flowing into (sneaking into) the lower space 1042. It was confirmed that the effect of reducing the flow velocity can be obtained by using CFD (computational fluid dynamics) analysis.

Further, in the solid-liquid separation system 1100 shown in FIG. 19A, the function of the inflow portion blocking plate 11011 shown in FIGS. 19B and 19C (the lateral flow flowing into the settling basin is allowed to flow (sneak in) to the lower part of the inclined plate device 11010). ), While replacing the function of the inflow part blocking plate with the sewage inclined plate 1020P in the front row (the first row closest to the inflow part 1014 of the settling basin) of the inclined plate device 1010, the inflow part blocking The vertical length of the flow plate 1011 can be shortened, and the space under the inflow portion blocking plate 1011 (see the space Q in FIG. 19A, the space Q'in FIG. 19B, and the space Q'in FIG. 19C) can be secured. ..

As a result, in the solid-liquid separation system 1100 of the present embodiment, the cross section of the flow path at the lower part of the inflow portion blocking plate 11011 as shown in FIGS. 19B and 19C is sharply contracted (the cross section of the flow path through which the water flow passes is sharp. By gradually reducing the cross section of the flow path toward the lower space 1042 of the inclined plate device 1010 as shown in the inflow path 1043, the lower space 1042 of the inclined plate device 1010 is formed. It is possible to suppress an increase in the speed of the flowing (sneaking in) water flow. Suppression of this increase in the velocity of the water flow leads to equalization of the flow velocity distribution in the lower space 1042 of the inclined plate device 1010, and the conditions for sedimentation and separation of the suspended substance can be enhanced to the advantageous side.

Further, the solid-liquid separation system 1100 of the present embodiment includes a water flow guide surface facing a part of the sewage inclined plate 1020 from a position exceeding the water surface WS of the water to be treated W to the bottom surface 1010a of the inclined plate device 1010. Has been done. The water flow guide surface faces substantially parallel to the sewage inclined plate 1020.

In the second embodiment 2a, the water flow guide surface is also used as the second surface 1020b on the inflow portion 1014 side of the endmost sewage inclined plate 1020P arranged on the inflow portion 1014 side.

With this configuration, the inflow path 1043 can be formed by using the surface of each component on the inflow portion 1014 side while keeping the space Q wide, so that the flow can be performed with a simple configuration without increasing the number of parts. The sudden contraction of the road can be reduced.

Further, in the solid-liquid separation system 1100 of the present embodiment, the inflow portion blocking plate 1011 and the inclined plate device 1010 are separated and are separately fixed to the final settling basin P. As a result, when vibration is applied due to an earthquake or the like, both sides do not affect each other, so that seismic resistance can be improved.

Further, in the solid-liquid separation system 1100 of the present embodiment, the lower end 1011e of the inflow portion blocking plate 1011 is arranged above the upper end 1020i of the sewage inclined plate 1020P. As a result, it is possible to reduce the rapid contraction of the flow path on the lower side of the inflow portion blocking plate 1011.

Further, in the solid-liquid separation system 1100 of the present embodiment, the upper end 1020i of the sewage inclined plate 1020P is arranged below the lower end 1011e of the inflow portion blocking plate 1011. In the configurations shown in FIGS. 19B and 19C, it is necessary to provide a separation distance d between the inflow portion blocking plate 11011 and the inclined plate device 11010 in order to avoid contact, but the configuration shown in FIG. 19A of the present embodiment. Since the inflow portion blocking plate 1011 is provided above the upstream end of the inclined plate device 1010, it is not necessary to provide a separation distance, and the length between the inflow portion 1014 and the outflow portion 1015 is shortened. be able to.

Further, in the solid-liquid separation system 1100 of the present embodiment, the length of the endmost inclined plate for sewage 1020P arranged on the most inflow portion blocking plate 1011 side is 100 to 2000 mm. The angle formed by the water flow guide surface (for example, the endmost inclined plate for sewage 1020 arranged on the inflow portion side) and the horizontal direction D is 20 ° to 70 °.

As a result, the sludge settled on the sewage inclined plate 1020P that also serves as a water flow guide surface can be appropriately dropped to the bottom surface of the settling basin.

(Embodiment 2b)
The solid-liquid separation system according to the second embodiment of the present invention will be described.

<Composition>
In the second embodiment, the water flow guide surface is also used as the second surface 1020b of the sewage inclined plate 1020P at the end on the inflow portion 1014 side and the surface 1011a on the inflow portion 1014 side of the inflow portion blocking plate 1011. In the solid-liquid separation system of the second embodiment, the water flow guide surface is also used only for the sewage inclined plate.

FIG. 20 is a side view showing a partial configuration of the solid-liquid separation system 1200 according to the second embodiment of the present invention.

As shown in FIG. 20, in the solid-liquid separation system 1200 of the present embodiment 2b, unlike the solid-liquid separation system 1100 of the second embodiment 2a, the water surface of the water to be treated W is not provided with the inflow portion blocking plate 1011. By using the endmost sewage inclined plate 1220P having a length exceeding WS, the water to be treated W flowing in from the inflow portion 1014 is similarly guided to the lower space 1042 of the inclined plate device 1210.

The sewage inclined plate 1220P at the end on the inflow portion 1014 side of the inclined plate device 1210 is formed so that the upper end 1220i extends to a position exceeding the water surface WS as compared with other sewage inclined plates 1020. The surface of the sewage inclined plate 1220P on the inflow portion 1014 side is shown as the second surface 1220b, and the surface opposite to the second surface 1220b is shown as the first surface 1220a. The second surface 1220b of the sewage inclined plate 1220P at the end on the inflow portion 1014 side corresponds to an example of the water flow guide surface.

The lower end 1220j of the sewage inclined plate 1220P may be set to substantially the same height as the lower end 1020j of the other sewage inclined plate 1020. In FIG. 20, as the bottom surface of the inclined plate device 1210, a virtual bottom surface 1210a connecting the lower end 1220j and the lower end 1020j is shown.

Further, the surface lowered from the intersection line of the sewage inclined plate 1220P and the water surface WS to the bottom surface PB in the vertical direction G is defined as S1, and the surface lowered from the lower end 1220j of the sewage inclined plate 1220 to the bottom surface PB in the vertical direction G is defined as S2. To do. The space on the upstream side of the surface S1 may be set as the upstream space 1041, the space on the downstream side of the surface S2 may be set as the lower space 1042, and the space between the surface S1 and the surface S2 may be set as the inflow path 1043. it can.

<Action effect, etc.>
In the second embodiment 2b, the water to be treated W flowing from the inflow portion 1014 flows through the upstream space 1041, and the flow is blocked by the second surface 1220b of the sewage inclined plate 1220P at the end and descends. The lowered water W to be treated flows toward the bottom surface PB along the inclination of the second surface 1220b of the endmost sewage inclined plate 1220P, and flows into the lower space 1042 under the inclined plate device 1210.

At this time, the inclined plate 1220P for sewage is arranged at a position so as not to interfere with other parts such as a scraper.

The solid-liquid separation system 1200 of the present embodiment is provided with a water flow guide surface facing a part of the sewage inclined plate 1020 from a position exceeding the water surface WS of the water to be treated W to the bottom surface 1210a of the inclined plate device 1210. There is. The water flow guide surface faces substantially parallel to the sewage inclined plate 1020.

In the second embodiment 2b, the water flow guide surface is also used as the second surface 1220b on the inflow portion 1014 side of the endmost sewage inclined plate 1220P arranged on the inflow portion 1014 side.

With this configuration, the inflow path 1043 can be formed by using the surface of each component on the inflow portion 1014 side while maintaining a wide space for water to flow from the upstream space 1041 to the inflow path 1043. It is possible to reduce the sudden contraction of the flow path with a simple configuration without increasing the number of parts.

Further, the angle formed by the water flow guide surface (for example, the endmost inclined plate for sewage 1220P arranged on the inflow portion side) and the horizontal direction D is 20 ° to 70 °.

As a result, the sludge settled on the sewage inclined plate 1220P that also serves as a water flow guide surface can be appropriately dropped to the bottom surface of the settling basin.

(Embodiment 2c)
The solid-liquid separation system according to the second embodiment of the present invention will be described.

<Composition>
In the second embodiment, the water flow guide surface is also used as the second surface 1020b of the sewage inclined plate 1020P at the end on the inflow portion 1014 side and the surface 1011a on the inflow portion 1014 side of the inflow portion blocking plate 1011. In the solid-liquid separation system of the second embodiment, the water flow guide surface is also used only as the inflow portion blocking plate.

FIG. 21 is a partial side view showing the configuration of the solid-liquid separation system 1300 of the present embodiment. The inflow portion blocking plate 1311 of the solid-liquid separation system 1300 includes a first portion 1311a arranged substantially vertically and an inclined portion 1311b inclined so as to approach the bottom surface PB from the upstream space 1041 toward the lower space 1042. Has. The surface 1311d on the inflow portion 1014 side of the first portion 1311a of the inflow portion blocking plate 1311 and the surface 1311c on the bottom surface PB side (inflow portion 1014 side) of the inclined portion 1311b correspond to an example of the water flow guide surface. In FIG. 21, a virtual bottom surface 1310a connecting the lower ends 1020j is shown as the bottom surface of the inclined plate device 1310.

Further, in the inclined plate device 1310, the shapes of the upper frame 1321, the lower frame 1322 and the upper and lower frames 1325 are changed as compared with the inclined plate device 1010 of the second embodiment so as not to interfere with the inclined portion 1311b. The inflow portion blocking plate 1311 and the inclined plate device 1310 are not mechanically connected. Since the configuration is not connected, the sewage inclined plate 1320 is less likely to directly receive the energy when a vibration occurs, so that damage can be avoided.

Further, the surface lowered from the first portion 1311a of the inflow portion blocking plate 1311 to the bottom surface PB in the vertical direction G is defined as S1, and the surface lowered from the lower end 1311e of the inflow portion blocking plate 1311 to the bottom surface PB in the vertical direction G is S2. And. The space on the upstream side of the surface S1 may be set as the upstream space 1041, the space on the downstream side of the surface S2 may be set as the lower space 1042, and the space between the surface S1 and the surface S2 may be set as the inflow path 1043. it can.

In the second embodiment 2c, the water to be treated W flowing from the inflow portion 1014 flows through the upstream space 1041, and the flow is blocked by the surface 1311d of the inflow portion blocking plate 1311 and descends. The descended water to be treated W flows toward the bottom surface PB along the inclination of the surface 1311c of the inflow portion blocking plate 1311 and flows into the lower space 1042 below the inclined plate device 1310.

<Action effect, etc.>
In the solid-liquid separation system 1300 of the present embodiment 2c, a water flow guide surface facing a part of the sewage inclined plate 1020 is provided from a position exceeding the water surface WS of the water to be treated W to the bottom surface 1310a of the inclined plate device 1310. ing. The water flow guide surface faces substantially parallel to the sewage inclined plate 1020. In the second embodiment 2c, the water flow guide surface is also used as the surfaces 1311c and 1311d on the inflow portion 1014 side of the inflow portion blocking plate 1311.

With this configuration, the inflow path 1043 can be formed by using the surface of each component on the inflow portion 1014 side while maintaining a wide space for water to flow from the upstream space 1041 to the inflow path 1043. It is possible to reduce the sudden contraction of the flow path with a simple configuration without increasing the number of parts.

Further, in the solid-liquid separation system 1300 of the second embodiment, the inflow portion blocking plate 1311 and the inclined plate device 1310 are separated and separately fixed to the final settling basin P. As a result, when vibration is applied due to an earthquake or the like, both sides do not affect each other, so that seismic resistance can be improved.

As described above, in the solid-liquid separation systems 1100, 1200, and 1300 of the second embodiments 2a to 2c, from the position where the water surface W to be treated exceeds the water surface WS to the bottom surfaces 1010a, 1210a, 1310a of the inclined plate devices 1010, 1210, 1310. , A water flow guide surface facing a part of the sewage inclined plate 1020 is provided. At least a part of the water flow guide surface faces the sewage inclined plate 1020. Further, in the present specification, "opposing" includes facing each other via another member.

The specific configuration of the water flow guide surface is any one of the following configurations as shown in the above embodiments 2a to 2c.
(1) The water flow guide surface is also used as the second surface 1020b of the sewage inclined plate 1020P at the end on the inflow portion 1014 side and the surface 1011a on the inflow portion 1014 side of the inflow portion blocking plate 1011.
(2) The water flow guide surface also serves as the second surface 1220b on the inflow portion 1014 side of the endmost sewage inclined plate 1220P arranged on the inflow portion 1014 side.
(3) The water flow guide surface is also used as the surfaces 1311c and 1311d on the inflow portion 1014 side of the inflow portion blocking plate 1311.

With this configuration, the inflow path 1043 can be formed by using the surface of each component on the inflow portion 1014 side while maintaining a wide space for water to flow from the upstream space 1041 to the inflow path 1043. It is possible to reduce the sudden contraction of the flow path with a simple configuration without increasing the number of parts.

(Other embodiments)
Although the embodiments according to the present invention have been described above, the present invention is not limited to the above embodiments and can be appropriately modified without departing from the spirit of the present invention.

(A)
In the above embodiments 2a to 2c, the water flow guide surface is formed on at least one of the sewage inclined plate 1020P and the inflow portion blocking plate 1011, but the present invention is not limited to this, and the sewage inclined plate 1020P and the inflow A member on which a water flow guide surface is formed may be provided separately from the partial blocking plate 1211. This member may be supported together with the inflow portion blocking plate 1011 or the inclined plate device 1010, or may be supported by the wall surface Ps of the final settling basin P.

(B)
In the above embodiment, the upper end 1020i of the second surface 1020b of the sewage inclined plate 1020P, which is an example of the water flow guide surface, is arranged below the lower end 1011e of the inflow portion blocking plate 1011, but from the lower end 1011e. May also be located on the upper side. However, it is preferable that the lower end 1011e of the inflow portion blocking plate 1011 is located above the lower end 1020j of the second surface 1020b of the sewage inclined plate 1020P.

(C)
In the above embodiment, the second surface 1020b of the sewage inclined plate 1020P forming a part of the water flow guide surface, the surface 1311c of the inflow portion blocking plate 1311, or the sewage inclined plate 1220P forming the water flow guide surface. Since the second surface 1220b is formed by one plane, it is linear in the side view, but it is sufficient to approach the bottom surface PB from the upstream space 1041 toward the lower space 1042, and the second surface 1220b is formed by a plurality of planes and is viewed from the side. It may be a polygonal line in.

Further, the water flow guide surface is not limited to a flat surface, and all or part of it may be formed with a curved surface.

(D)
Further, in the above embodiment, the inflow portion blocking plate 1011 is arranged along the vertical direction G, but the present invention is not limited to this, and for example, the upper end is located closer to the inflow portion 1014 than the lower end. It may be inclined to.

(E)
The sewage inclined plate 1020 of the above-described embodiment may be divided into a plurality of inclined plates along the width direction F. FIG. 22 is a perspective view showing a sewage inclined plate 1020'divided into a plurality of inclined plates. The sewage inclined plate 1020'has a plurality of inclined plates 1060 and a connecting member 1061 arranged between adjacent inclined plates 1060. In the example shown in FIG. 22, three inclined plates 1060 and two connecting members 1061 are provided. The three inclined plates 1060 are arranged side by side along the width direction F so that the main surfaces are located on the same surface. As shown in the enlarged view of the T portion, the connecting member 1061 is provided with an insertion portion 1061a into which the ends of the respective inclined plates 1060 are inserted. By inserting the end of the inclined plate 1060 into the insertion portion 1061a, the inclined plate 1020'for sewage can be formed. Any method may be used for fixing between the connecting member 1061 and the inclined plate 1060. For example, the connecting member 1061 and the inclined plate 1060 may be penetrated with the end of the inclined plate 1060 inserted into the insertion portion 1061a. Just insert a pin or the like into.

(F)
In the above embodiment, the sewage slope plate 1020 is supported by the support rod 1023 by the hook 1024, but the hook is not limited to the hook, and a plurality of sewage slope plates 1020 can be arranged side by side. For example, the support method is not limited.

The solid-liquid separation system of the present invention exerts an effect capable of suppressing the imbalance of the flow velocity distribution in the space below the inclined plate device, and is useful as a final settling basin of a sewage treatment facility.

In the conventional configuration described in (Background Art), the cross section of the flow path is sharply contracted by the inflow portion blocking plate arranged on the upstream side of the inclined plate device (the cross section of the flow path through which the water flow passes is sharply narrowed. As a result, the velocity of the water flow increased when the water flow flowed into the space below the inclined plate device, and the flow velocity distribution in the space below the inclined plate device was unbalanced between the front stage and the rear stage.

An object of the present invention is to provide a solid-liquid separation system capable of suppressing an imbalance in the flow velocity distribution in the space below the inclined plate device.

A solid-liquid separation system that achieves the above object described in the embodiment can be described as the following invention.

(1)
Settling basin used for sewage treatment plant and
The inflow part where the water to be treated flows into the sedimentation basin and
The outflow part where the treated water flows out from the sedimentation basin and
It is provided with a tilt plate device having a plurality of tilt plates and arranged between the inflow portion and the outflow portion by opening a predetermined lower space from the bottom surface of the sedimentation basin.
A water flow guide surface facing a part of the inclined plate is provided from a position exceeding the water surface of the water to be treated to the bottom surface of the inclined plate device.
Solid-liquid separation system.

By providing the water flow guide surface in this way, it is possible to reduce the rapid contraction of the flow path when the water to be treated flows into the lower side of the inclined plate, so that the speed of the water flow flowing into the space under the inclined plate device It is possible to suppress the increase. Therefore, it is possible to suppress the imbalance of the flow velocity distribution in the space below the inclined plate device.

Note that, in the present specification, "opposing" includes facing each other via another member.

(2)
The water flow guide surface is a surface on the inflow portion side of the endmost inclined plate arranged on the inflow portion side, a surface on the inflow portion side of the provided blocking plate, or the endmost inclined plate. It also serves as one of the surfaces on the inflow portion side with the provided blocking plate.
The solid-liquid separation system according to (1) above. As a result, the water flow guide surface can be formed by using at least one surface of the inclined plate and the blocking plate on the inflow portion side, so that the sudden contraction of the flow path can be reduced with a simple configuration without increasing the number of parts. it can.

(3)
The length of the inclined portion of the water flow guide surface is 100 to 2000 mm, and the angle formed by the water flow guide surface in the horizontal direction is 20 ° to 70 °.
The solid-liquid separation system according to (1) or (2) above.

As a result, the sludge settled on the member on which the water flow guide surface is formed can be appropriately dropped to the bottom surface of the settling basin.

(4)
A first support portion that supports the inclined plate device in the settling basin,
At least one second support portion for supporting the blocking plate in the sedimentation basin is provided.
The first support portion and the second support portion are separately fixed to the side wall of the settling basin.
The solid-liquid separation system according to (2) above.

As a result, when vibration is applied due to an earthquake or the like, both sides do not affect each other, so that seismic resistance can be improved.

According to the present invention, it is possible to provide a solid-liquid separation system capable of suppressing an imbalance in the flow velocity distribution in the space below the inclined plate device.

(Embodiment 3)
The solid-liquid separation system according to the third embodiment of the present invention will be described in detail with reference to the drawings.

<Composition>
(Solid-liquid separation system 2100)
FIG. 23 is a diagram showing the solid-liquid separation system 2100 of the present embodiment. The solid-liquid separation system 2100 of the present embodiment is applied to the solid-liquid separation of the water to be treated W in the final settling basin P of the sewage treatment plant.

As shown in FIG. 23, the solid-liquid separation system 2100 includes a final settling basin P (an example of a settling basin), an inclined plate device 2010, a diversion plate 2011, an overflow weir 2012, a water channel 2013, and an inflow portion. It includes 2014, an outflow section 2015, a sludge scraper 2016, and a sludge hopper 2017.

In the inflow section 2014, raw water (water to be treated W) flows into the final settling basin P. The outflow portion 2015 is provided on the opposite side of the inflow portion 2014 in the final settling basin P, and the purified water W to be treated flows out from the final settling basin P.

The inclined plate device 2010 is arranged in a portion downstream from the substantially central portion of the final settling basin P (outflow portion 2015 side). The inclined plate device 2010 has a plurality of inclined plates 2020 for sewage. The plurality of sewage inclined plates 2020 are arranged side by side from the upstream side to the downstream side with the water surface side tilted toward the inflow portion 2014 side.

The inclined plate device 2010 is supported so that the water to be treated W sinks to a predetermined depth from the water surface and a predetermined space is secured between the inclined plate device 2010 and the bottom surface of the final settling basin P. This support may be placed, for example, on a support (not shown) or suspended from a horizontal member (not shown). The details of the inclined plate device 2010 will be described in detail later.

The blocking plate 2011 is provided on the upstream side (inflow portion 2014 side) of the inclined plate device 2010 and at a substantially central portion of the final settling basin P. The flow blocking plate 2011 blocks the flow of the water to be treated W to the downstream side (outflow portion 2015 side) in the region from the water surface to a predetermined depth.

The overflow weir 2012 is arranged near the water surface of the water to be treated W on the downstream side (outflow portion 2015 side) of the flow blocking plate 2011. The overflow weir 2012 is formed along the direction from the upstream side to the downstream side.

The waterway (trough) 2013 is formed by being surrounded by the overflow weir 2012 and is connected to the outflow section 2015. It should be noted that the structure is not limited to the overflow weir 2012, and a hole may be formed in the pipe.

The water W to be treated that has flowed into the final settling basin P from the inflow portion 2014 is blocked by the blocking plate 2011 in the direction of the water flow, and toward the portion between the lower end of the blocking plate 2011 and the bottom surface of the final settling basin P. Descend. The water W to be treated that has passed between the bottom surface of the final settling basin P and the lower end of the blocking plate 2011 becomes an upward flow J toward the waterway 2013, and is between the lower portion 2010a of the inclined plate device 2010 and the inclined plate for sewage 2010. It flows into and rises.

Then, the sludge of the water to be treated W is settled while passing through the inclined plate device 2010, and is settled on the first surface 2020a of the inclined plate for sewage 2020 to purify the water to be treated W. The sludge settled on the first surface 2020a of the sewage inclined plate 2020 falls by its own weight as it is deposited.

The sludge scraper 2016 is arranged near the bottom surface of the final settling basin P. Settled sludge M is deposited near the bottom surface of the final settling basin P. The accumulated sludge M is collected in the sludge hopper 2017 by rotating the sludge scraper 2016 clockwise on FIG. 23, and is discharged.

The sludge hopper 2017 is formed on the bottom surface near the inflow portion 2014 of the final settling basin P.

(Inclination plate device 2010)
FIG. 24 is a perspective view schematically showing the configuration of the inclined plate device 2010.

As shown in FIG. 24, the inclined plate device 2010 includes a plurality of inclined plates for sewage 2020, upper frames 2021a and 2021b, lower frames 2022a and 2022b, a plurality of support rods 2023, and a plurality of hooks 2024. have.

The upper frames 2021a and 2021b are arranged along the direction D (an example of a predetermined direction) from the inflow portion 2014 to the outflow portion 2015. The upper frames 2021a and 2021b are arranged parallel to each other.

The lower frames 2022a and 2022b are arranged along the direction D from the inflow portion 2014 to the outflow portion 2015. The lower frames 2022a and 2022b are arranged parallel to each other. The upper frames 2021a and 2021b are arranged closer to the water surface than the lower frames 2022a and 2022b.

The plurality of support rods 2023 are erected in parallel between the upper frames 2021a and 2021b, and are also erected in parallel between the lower frames 2022a and 2022b.

The sewage tilt plate 2020 is tilted with respect to the upper frames 2021a and 2021b and the lower frames 2022a and 2022b, and is attached to a pair of upper and lower support rods 2023.

The sewage inclined plate 2020 has a first surface 2020a on the upper frames 2021a and 2021b sides and a second surface 2020b on the lower frames 2022a and 2022b sides. A plurality of inclined plates for sewage 2020 are arranged side by side so as to be inclined along the length direction (direction D) of the upper frames 2021a and 2021b and the lower frames 2022a and 2022b.

The inclined plate device 2010 is installed in the final settling basin P of the sewage treatment plant with the lower frames 2022a and 2022b facing the bottom surface side of the final settling basin P. Therefore, the second surface 2020b of the sewage inclined plate 2020 is directed to the bottom surface side of the final settling basin P.

The sewage inclined plate 2020 is attached by being locked to the support rods 2023 arranged vertically by a plurality of hooks 2020.

(Sewage tilt plate 2020)
The inclined plate 2020 for sewage is formed by bending a substantially rectangular member. Hard vinyl chloride is preferable as the material of the inclined plate 2020 for sewage, but the material is not limited to this.

The material of the inclined plate is, for example, a thermoplastic resin, for example, a vinyl resin such as polyvinyl chloride, a carbonate resin such as polycarbonate, an ester resin such as polyethylene terephthalate, an acrylic resin such as polymethyl methacrylate, polypropylene, polyethylene, etc. It may be an olefin resin, a styrene resin such as ABS, a copolymer or a mixed resin thereof, or a thermosetting resin such as an epoxy resin or an unsaturated polyester resin, and may be a metal, ceramic, or the like. It may be wood, rubber, or the like.

FIG. 25 is a side view schematically showing the inclined plate device 2010. FIG. 26A is a plan view showing the second surface 2020b side of the sewage inclined plate 2020. FIG. 26B is a plan view showing the first surface 2020a side of the sewage inclined plate 2020.

As shown in FIGS. 24 to 26, the sewage inclined plate 2020 has a main body portion 2031 and a bent portion 2032.

As shown in FIGS. 26 (a) and 26 (b), the main body portion 2031 has an upper end portion 2031i, a lower end portion 2031j, a first end portion 2031c, a second end portion 2031d, and a first surface 2031a. It has a second surface 2031b.

When the sewage inclined plate 2020 is attached to the upper frames 2021a and 2021b, the lower frames 2022a and 2022b, and the support rod 2023 described above, the upper end portion 2031i and the lower end portion 2031j are supported as shown in FIG. It is arranged parallel to the rod 2023.

Further, the upper end portion 2031i is arranged above the upper frames 2021a and 2021b, and the lower end portion 2031j is arranged below the lower frames 2022a and 2022b.

The first end portion 2031c and the second end portion 2031d are arranged so as to be inclined from the upper frames 2021a and 2021b toward the lower frames 2022a and 2022b.

The bent portion 2032 extends from the lower end portion 2031j of the main body portion 2031 toward the opposite side (arrow D direction) of the inflow portion 2014. The bent portion 2032 has an upper first surface 2032a, a lower second surface 2032b, and a tip 2032c on the opposite side of the inflow portion 2014.

In the present embodiment, the bent portion 2032 is formed in a substantially horizontal direction, but the present invention is not limited to this. Of the angles formed by the main body portion 2031 and the bent portion 2032, the angle θc on the side opposite to the inflow portion 2014 is preferably set to 120 degrees or more and less than 180 degrees.

Further, the first surface 2020a of the sewage inclined plate 2020 is formed by the first surface 2031a of the main body portion 2031 and the first surface 2032a of the bent portion 2032. The second surface 2020b of the sewage inclined plate 2020 is formed by the second surface 2031b of the main body portion 2031 and the second surface 2032b of the bent portion 2032.

The plurality of inclined plates for sewage 2020 are arranged side by side along the direction D in which the water to be treated flows from the inflow portion 2014 into the settling basin P. The plurality of sewage slope plates 2020 are arranged so that adjacent sewage slope plates 2020 face each other and are parallel to each other.

Specifically, the plurality of sewage inclined plates 2020 are the first surface 2031a of the main body portion 2031 of one of the adjacent sewage inclined plates 2020 and the main body portion of the other sewage inclined plate 2020. The second surface 2031b of 2031 is arranged so as to face each other.

As shown in FIGS. 23 to 25, each sewage inclined plate 2020 is inclined so as to be located on the inflow portion 2014 side as it goes upward, and the upper frames 2021a, 2021b, the lower frames 2022a, 2022b, and It is supported by a plurality of support rods 2023. As shown in FIG. 25, the sewage inclined plate 2020 is arranged so that the upper end portion 2031i of the main body portion 2031 is located closer to the inflow portion 2014 than the lower end portion 2031j.

Further, in the side view, the angle θa formed by the main body portion 2031 of the sewage inclined plate 2020 and the arrow D direction (corresponding to the horizontal direction in the present embodiment) is 10 degrees or more, and the main body portion 2031 and the vertical direction G The angle θb to be formed is set to 20 degrees or more.

Assuming that the distance of the inclined plate for sewage 2020 along the arrow D direction is c and the length of the bent portion 2032 projected in the arrow D direction is b, 0.20 ≦ b / c ≦ 0.90 is satisfied. A plurality of sewage ramps 2020 are arranged. In the present embodiment, since the extending direction of the bent portion 2032 and the direction of the arrow D are the same, the length of the bent portion 2032 itself and the length projected in the direction of the arrow D are the same.

For example, as shown in FIG. 27, when the bent portion 2032 does not coincide with the direction of arrow D, the length b becomes the length obtained by projecting the bent portion 2032 in the direction of arrow D, and the actual bending portion 2032 is formed. Length and b do not match. Since the arrow D is in the horizontal direction in the present embodiment, the length b can be said to be the length in the arrow D direction (which can also be said to be the inflow direction of the water to be treated) when the bent portion 2032 is projected on the horizontal plane.

Sludge supplementation treatment is performed on the second surface 2020b (including the second surface 2031b and the second surface 2032b) of the sewage inclined plate 2020 shown in FIG. 26 (a). Here, the sludge supplementation treatment is a treatment for making the second surface 2020b of the sewage inclined plate 2020 into a state in which sludge easily accumulates so that the sludge in the water to be treated does not flow out from the final settling basin P.

For example, by increasing the roughness of the surface of the inclined plate and forming unevenness in the direction along the movement of the sludge along the surface or in the direction orthogonal to the surface, the sludge easily adheres to the surface of the inclined plate. It can, but is not limited to. The method for roughening the surface is not particularly limited, but it may be mechanically processed by, for example, sandblasting, or it may be finely etched with a predetermined chemical or a mold with a predetermined surface roughness. It may be press working or the like. Further, the supplementary treatment may not be applied to the entire second surface 2020b.

The first surface 2020a (including the first surface 2031a and the first surface 2032a) opposite to the second surface 2020b is preferably a flat surface so that sludge can easily slide down.

The inclined plate 2020 for sewage can be produced by deformed extrusion molding, injection molding, etc., but extrusion molding is preferable.

Further, in the inclined plate device 2010 of the present embodiment, all the inclined plates for sewage 2020 are provided with bent portions 2032, and all the inclined plates for sewage 2020 are arranged with the same interval c.

Here, the effective sedimentation area will be described using two adjacent sewage slope plates 2020. About the effective settling area in the length from the upper end part 2031i of the predetermined sewage inclined plate 2020 to the tip 2032c of the bent portion 2032 of the sewage inclined plate 2020 on the side opposite to the inflow portion 2014 of the predetermined sewage inclined plate 2020. , The case where the inclined plate 2020 for sewage is provided and the case where it is not provided are compared.

Assuming that the length in the arrow D direction when the sewage inclined plate 2020 (leftmost in FIG. 25) is projected on the bottom surface (horizontal plane) of the settling basin P is k, the length k and the depth direction (FIG. 31 described later). The product with the length in the width direction F) is the effective settling area of the sewage inclined plate 2020.

Further, since the distance between the sewage inclined plate 2020 and the sewage inclined plate 2020 on the opposite side (second from the left in FIG. 25) of the inflow portion 2014 is c, the inclined plate device 2010 is not provided. The effective sedimentation area in is the product of the length k + c and the length in the depth direction. On the other hand, the effective sedimentation area of the adjacent sewage slope plate 2020 (second from the left in FIG. 25) is also the product of the length k and the length in the depth direction.

Therefore, the effective settling area when the sewage inclined plate 2020 is not provided is ((k + c) × length in the depth direction), and the effective settling area when the sewage inclined plate 2020 is provided is. 2k x length in the depth direction). Note that k is set longer than c.

In this way, the effective sedimentation area can be increased only in the portion where the lengths k overlap, as compared with the case where the inclined plate device 2010 is not provided.

Further, the length obtained by projecting the bent portion 2032 in the direction of arrow D can be said to be the length obtained by projecting the bent portion 2032 on the projection surface of the effective sedimentation area of the sewage inclined plate 2020.

Further, on the second surface 2031b of the main body portion 2031 of the sewage inclined plate 2020, a groove portion 2033 is provided along each of the first end portion 2031c and the second end portion 2031d. A hook hole 2033b is formed in the groove portion 2033, and the hook 2024 described above is mounted in the hook hole 2033b. The sewage tilt plate 2020 is attached to the support rod 2023 of the tilt plate device 2010 by the hook 2024 mounted in the hook hole 2033b. Further, on the first surface 2031a, a ridge portion 2033a facing the groove portion 2033 is formed.

FIG. 28 is a graph showing a graph of inflow resistance to the inclined plate device with respect to the flow velocity of the lower portion 2010a of the inclined plate device 2010. As shown in FIG. 28, the inflow resistance between the sewage inclined plates 2020 increases as the flow velocity increases. Since the speed of the lower portion 2010a of the inclined plate device 2010 is higher as it is closer to the inflow portion 2014, the inflow portion 2014 has a speed as compared with a conventional structure having no bent portion (for example, the structure of Patent Document 1). The closer it is, the larger the inflow resistance becomes and the inflow amount decreases, and as compared with the conventional structure in which the bent portion is not provided, the inflow resistance decreases and the inflow amount increases as the distance from the inflow portion 2014 increases. Therefore, it is possible to suppress the unevenness of the flow rate in the plurality of inclined plates.

Further, since it is not necessary to widen the interval between the inclined plates for sewage on the side far from the inflow portion 2014 and it is not necessary to shorten the length of the inclined plates, it is not necessary to reduce the effective sedimentation area, and the processing capacity can be increased. The decrease can be prevented.

In this way, it is possible to suppress the bias of the flow rate in a plurality of inclined plates without reducing the effective sedimentation area.

<Installation method>
The method of attaching the sewage inclined plate 2020 to the support rod 2023 according to the embodiment of the present invention will be described below.

29 and 30 are perspective views showing the attachment of the sewage inclined plate 2020 to the support rod 2023.

As shown in FIGS. 29 and 30, the sewage inclined plate 2020 is attached by passing between the support rods 2023 from below the lower frames 2022a and 2022b and locking the four hooks 2024 to the support rod 2023. ..

By attaching from below in this way, the sewage inclined plate 2020 provided with the bent portion 2032 can be arranged on the support rods 2023 of the upper frames 2021a and 2021b and the support rods 2023 of the lower frames 2022a and 2022b.

<Other embodiments>
Although the embodiments according to the present invention have been described above, the present invention is not limited to the above embodiments and can be appropriately modified without departing from the spirit of the present invention.

(A)
In the above embodiment, the bent portion 2032 is formed on all the sewage inclined plates 2020, but the bent portion may not be formed on some of the sewage inclined plates 2020.

In this case, it is better that the inclined plate in which the bent portion is formed is arranged on the side closer to the inflow portion 2014 and the inclined plate in which the bent portion is not formed is arranged on the side farther from the inflow portion 2014. Is preferable because it can reduce.

(B)
In the above embodiment, the angle θc formed by the main body portion 2031 and the bent portion 2032 is set to the same angle in all the inclined plates for sewage 2020, but may be different.

(C)
In the above embodiment, in all the inclined plates for sewage 2020, the bent portion 2032 extends from the lower end portion 2031j of the main body portion 2031 to the side opposite to the inflow portion 2014, but may extend to the inflow portion 2014 side. However, it is preferable to extend to the side opposite to the inflow portion 2014 because the inflow amount is likely to decrease.

(D)
In the above embodiment, the sewage slope plate 2020 is supported by the support rod 2023 by the hook 2020, but the hook is not limited to the hook, and a plurality of sewage slope plates 2020 can be arranged side by side. For example, the support method is not limited.

<Example>
Examples of the above embodiments will be described below.

FIG. 31 is a schematic plan view for explaining the arrangement of the sewage inclined plate 2020 in this embodiment. In this example, the sedimentation basin P has a width (arrow F direction) of 5.6 m, a length (arrow D direction) of 41.6 m, an effective water depth of 3.2 m, and an inflow water volume of 5630 m ³ / day. Polyvinyl chloride resin is used as the material of the inclined plate 2020 for sewage. Two types of inclined plates for sewage 2020 having a width (arrow F direction) of 1000 mm and a depth direction of 1000 mm and a width (arrow F direction) of 600 mm and a depth direction of 1000 mm were used. As shown in FIG. 31, 1000 mm × 1000 mm sewage inclined plates 2020 are arranged in four rows, and 600 mm × 1000 mm sewage inclined plates 2020 (indicated as sewage inclined plates 2020 ′ in FIG. 31) are arranged in one row. 186 sewage ramps were placed in each row.

Further, the inflow portion blocking plate (see the blocking plate 2011 in FIG. 23) and the lower blocking plate are formed of polyvinyl chloride. Although not shown, the lower blocking plate is installed on the pond skeleton side at the same height as the bottom of the solid-liquid separation system 2100 so as to close the gap between the solid-liquid separation system 2100 and the inner wall of the settling pond.

Under the above conditions, the value of b / c was changed to calculate the flow velocity in the front stage and the flow velocity in the rear stage of the inclined plate device by simulation, and the sludge accumulation state in the bent portion 2032 was obtained.

The flow velocity measurement position in the front stage is 2 m in the flow direction from the start end of the solid-liquid separation system 2100 shown in FIG. 23, and the flow velocity measurement position in the rear stage is 2 m in the inflow direction from the end. .. Further, in this embodiment, as shown in FIG. 25, the bent portion 2032 is provided in the horizontal direction.

The following (Table 1) and (Table 2) are diagrams showing a table of the results of Examples 1 to 8 and Comparative Examples 1 and 2.
(Table 1)

(Table 2)

Here, the depth of the inclined plate is the length in the width direction F, and the row portion of the inclined plate 2020 for sewage having a width of 1000 mm was examined. The conventional opening area is the product of the pitch (interval) c and the depth of the sewage slope plate 2020, and is the area where water flows between adjacent sewage slope plates when the bent portion is not provided. The opening area of the bent inclined plate is the product of the value obtained by subtracting the length b of the bent portion from the pitch (interval) c and the depth of the inclined plate for sewage 2020, and water flows between the adjacent inclined plates for sewage. The area. The loss coefficient is a value proportional to the pressure loss, and the flow velocity of the front stage portion and the flow velocity of the rear stage portion are calculated based on the pressure loss.

Comparative Example 1 is a flat inclined plate for sewage without a bent portion. In this case, the ratio of the flow velocity in the front stage to the flow velocity in the rear stage is 39.2.

In Comparative Example 2, b / c is set to 0.10, but the ratio is too small, so that the ratio between the flow velocity in the front stage and the flow velocity in the rear stage does not change and the effect is not exhibited.

On the other hand, in Examples 1 to 8, as the b / c increases, the ratio between the front-stage flow velocity and the rear-stage flow velocity decreases, and the bias of the inflow amount of water in the inclined plate device 2010 can be reduced.

Further, in Examples 1 and 2, sludge does not accumulate on the bent portion 2032, and in Examples 3 to 5, sludge accumulates on the bent portion 2032, but it is discharged by natural sliding. On the other hand, in Examples 6 to 8, sludge accumulates, so that regular cleaning is required. Therefore, it is more preferable that b / c is 0.2 or more and 0.6 or less.

The solid-liquid separation system of the present invention exerts an effect of suppressing the unevenness of the flow rate in a plurality of inclined plates without reducing the effective sedimentation area, and is useful as a final sedimentation basin of a sewage treatment facility.

In the inclined plate device having the conventional configuration described in (Background Technology), the inflow water tends to concentrate in the front stage portion of the device, the length of the inclined plate in the rear stage portion of the device is adjusted to be short, and the arrangement pitch of the rear stage is wide. A method of distributing an even flow rate to the entire apparatus by reducing the flow resistance by adjusting the arrangement of the inclined plates so as to be obtained is shown.

However, in either method, the effective settling area of the inclined plate is reduced, so that the processing capacity of the inclined plate device is reduced.

An object of the present invention is to provide a solid-liquid separation system capable of suppressing a flow rate bias in a plurality of inclined plates without reducing an effective sedimentation area.

A solid-liquid separation system that achieves the above object described in the embodiment can be described as the following invention.

(1)
Settling basin of sewage treatment plant and
The inflow part where the water to be treated flows into the sedimentation basin and
The outflow part where the treated water flows out from the sedimentation basin and
A plurality of inclined plates arranged in the settling basin side by side in a predetermined direction are provided.
The plurality of inclined plates are arranged so that adjacent inclined plates are opposed to each other and parallel to each other.
Each of the inclined plates is inclined so as to be located on the inflow portion side toward the upper side.
At least a part of the inclined plates among the plurality of inclined plates has a main body portion and a bent portion provided at the lower end of the main body portion and bent with respect to the main body portion.
Assuming that the length of the bent portion projected in the predetermined direction is b and the distance between the inclined plates in the predetermined direction is c, 0.20 ≦ b / c ≦ 0.90 is satisfied.
Solid-liquid separation system.

By providing the bent portion in the inclined plate in this way, the opening area between the plurality of inclined plates can be limited, so that the flow rate flowing between the inclined plates can be limited. Therefore, by arranging an inclined plate having at least a bent portion in the vicinity of the front stage on the side close to the inflow portion of the plurality of inclined plates, the flow rate flowing between the inclined plates in the front stage is reduced, and between the inclined plates in the rear stage on the side far from the inflow portion. The flow rate flowing into can be increased.

That is, by appropriately arranging the inclined plates provided with the bent portions, the flow rate flowing between the inclined plates can be adjusted, and the uneven flow rate in the plurality of inclined plates can be suppressed.

Further, even when all the inclined plates are provided with bent portions, the inflow resistance between the inclined plates increases as the flow velocity increases, so that the inflow occurs in the previous stage where the flow velocity is high as compared with the case where the bent portions are not provided. The resistance increases and the inflow amount decreases, and the inflow resistance decreases and the inflow amount increases in the subsequent stage where the flow velocity slows down. Therefore, it is possible to suppress the unevenness of the flow rate in the plurality of inclined plates.

Further, since it is not necessary to widen the interval between the inclined plates in the rear stage than in the front stage and it is not necessary to shorten the length of the inclined plates in the rear stage, it is not necessary to reduce the effective sedimentation area, and the processing capacity can be increased. The decrease can be prevented.

In this way, it is possible to suppress the bias of the flow rate in a plurality of inclined plates without reducing the effective sedimentation area.

(2)
The bent portion is bent so as to extend from the lower end of the main body portion to the opposite side of the inflow portion.
The solid-liquid separation system according to (1) above.

As a result, the lower openings of the plurality of inclined plates face the opposite side to the inflow portion, so that the flow resistance increases and the amount of inflow between the inclined plates can be reduced.

(3)
The spacing between the plurality of inclined plates is the same.
The solid-liquid separation system according to (1) or (2) above.

As a result, it is possible to suppress the deviation of the flow rate in a plurality of inclined plates without reducing the effective sedimentation area.

(4)
The angle formed between the main body and the bent portion on the opposite side of the inflow portion of the inclined plate is 120 degrees or more and less than 180 degrees.
The solid-liquid separation system according to any one of (1) to (3) above. If this angle is less than 120 degrees, sedimented sludge will accumulate on the bent portion, which may require cleaning by an operator. Further, when the angle exceeds 180 degrees, the openings at the lower portions of the plurality of inclined plates face the inflow portion side, so that the flow resistance is lowered and it becomes difficult to reduce the inflow amount between the inclined plates.

Therefore, by setting the above angle to 120 degrees or more and less than 180 degrees, it is possible to increase the flow resistance and reduce the inflow amount between the inclined plates. Therefore, the amount of inflow to the inclined plate can be adjusted, and the unevenness of the flow rate in the plurality of inclined plates can be suppressed.

According to the present invention, it is possible to provide a solid-liquid separation system capable of suppressing the deviation of the flow rate in a plurality of inclined plates without reducing the effective sedimentation area.

(Embodiment 4)
Hereinafter, the solid-liquid separation system of the fourth embodiment according to the present invention will be described in detail with reference to the drawings.

<Composition>
(Solid-liquid separation system 4100)
FIG. 32 is a diagram showing a solid-liquid separation system 4100 of the present embodiment. The solid-liquid separation system 4100 of the present embodiment is applied to the solid-liquid separation of the water to be treated W in the final settling basin P of the sewage treatment plant.

As shown in FIG. 32, the solid-liquid separation system 4100 includes a final settling basin P (an example of a settling basin), an inclined plate device 4010, a diversion plate 4011, an overflow weir 4012, a water channel 4013, and an inflow portion. 4014, outflow unit 4015, sludge scraper 4016, sludge hopper 4017, measuring instrument 4018, mounting unit 4019, sludge extraction unit 4071, notification device 4072 including notification means, control unit 4073, To be equipped.

In the inflow section 4014, raw water (water to be treated W) flows into the final settling basin P. The outflow portion 4015 is provided on the opposite side of the inflow portion 4014 in the final settling basin P, and the purified water W to be treated flows out from the final settling basin P.

The inclined plate device 4010 is arranged in a portion downstream from the substantially central portion of the final settling basin P (outflow portion 4015 side). The inclined plate device 4010 has a plurality of inclined plates 4020 for sewage. The plurality of sewage inclined plates 4020 are arranged side by side from the upstream side to the downstream side with the water surface side tilted toward the inflow portion 4014 side.

The inclined plate device 4010 is supported so as to sink from the surface of the water to be treated W to a predetermined depth and to secure a predetermined space between the inclined plate device 4010 and the bottom surface PB of the final settling basin P. This support may be suspended from a girder or the like, or may be placed on a support (not shown), for example. The details of the inclined plate device 4010 will be described in detail later.

The blocking plate 4011 is provided on the upstream side (inflow portion 4014 side) of the inclined plate device 4010 and at a substantially central portion of the final settling basin P. The blocking plate 4011 is a plate-shaped member that is configured separately from the sewage inclined plate 4020. The flow blocking plate 4011 blocks the flow of the water to be treated W to the downstream side (outflow portion 4015 side) in the region from the water surface to a predetermined depth. The blocking plate 4011 is arranged so that the main surface is substantially perpendicular to the direction of the water flow flowing in from the inflow portion 4014.

The overflow weir 4012 is arranged near the surface of the water to be treated W on the downstream side (outflow portion 4015 side) of the blocking plate 4011. The overflow weir 4012 is formed along the direction from the upstream side to the downstream side.

The waterway (trough) 4013 is formed by being surrounded by the overflow weir 4012 and is connected to the outflow portion 4015. The overflow weir 4012 is not limited to this, and the pipe may have a hole formed therein.

The water W to be treated that has flowed into the final settling basin P from the inflow portion 4014 is blocked by the blocking plate 4011 in the water flow direction (arrow D direction (an example of a predetermined direction)), and finally settles with the lower end 4011e of the blocking plate 4011. It descends toward the part between the bottom surface PB of the pond P. The water W to be treated that has passed between the bottom surface PB of the final settling basin P and the lower end 4011e of the blocking plate 4011 becomes an upward flow J toward the water channel 4013, and becomes an upward flow J from the lower portion 4010a of the inclined plate device 4010 to the inclined plate 4020 for sewage. Inflows and rises during.

Then, the sludge of the water to be treated W collides with the second surface 4020b while passing through the inclined plate device 4010 and is trapped, or settles and settles on the first surface 4020a of the inclined plate 4020 for sewage. The water to be treated W is purified. The sludge settled on the first surface 4020a of the sewage inclined plate 4020 falls by its own weight as it is deposited.

The sludge scraper 4016 is arranged near the bottom surface of the final settling basin P. Settled sludge M is deposited near the bottom surface of the final settling basin P. The accumulated sludge M is collected in the sludge hopper 4017 by rotating the sludge scraper 4016 clockwise on FIG. 32 and is discharged. The sludge scraper 4016 passes near the water surface on the upstream side of the blocking plate 4011 and also scrapes suspended matter.

The sludge hopper 4017 is formed on the bottom surface near the inflow portion 4014 of the final settling basin P.

Measuring instrument 4018 measures sludge concentration. The measuring instrument 4018 is arranged between the inclined plate device 4010 and the bottom PB of the final settling basin P.

The mounting portion 4019 mounts the measuring instrument 4018 to the inclined plate device 4010. The mounting position of the inclined plate device 4010 is arranged at a position where the sludge collecting portion MP described later is likely to occur. As a specific example, the inclined plate device 4010 is arranged between the end position on the inflow portion side and the intermediate position, but the arrangement position can be optimized depending on the size of the settling basin.

The sludge extraction unit 4071 draws sludge from the sludge hopper 4017 to the outside of the final settling basin P. The notification device 4072 notifies the manager of the final settling basin P based on the sludge concentration detected by the measuring instrument 4018. Specifically, it issues an alarm.

The control unit 4073 increases the amount of sludge extracted by the pump of the sludge extraction unit 4071 based on the sludge concentration measured by the measuring instrument 4018. The control unit 4073 operates the notification device 4072 to perform notification based on the sludge concentration measured by the measuring instrument 4018. Specifically, the notification device 4072 issues an alarm.

(Inclination plate device 4010)
FIG. 33 is a perspective view schematically showing a part of the configuration of the inclined plate device 4010. FIG. 34 is a side view showing the inclined plate device 4010 and the blocking plate 4011. FIG. 35 is a diagram showing a tilt plate device 4010 in a cross section perpendicular to the direction D of the tilt plate device 4010. FIG. 36A is a plan view showing the second surface 4020b side of the sewage inclined plate 4020. FIG. 36B is a plan view showing the first surface 4020a side of the sewage inclined plate 4020.

As shown in FIG. 33, the tilt plate device 4010 includes a plurality of tilt plates for sewage 4020, a pair of upper frames 4021, a pair of lower frames 4022, a plurality of support rods 4023, and a plurality of hooks 4024. have.

The pair of upper frames 4021 are arranged along the direction D (an example of a predetermined direction) from the inflow portion 4014 toward the outflow portion 4015. The pair of upper frames 4021 are arranged parallel to each other.

The pair of lower frames 4022 are arranged along the direction D from the inflow portion 4014 toward the outflow portion 4015. The pair of lower frames 4022 are arranged parallel to each other. The pair of upper frames 4021 are arranged closer to the water surface than the pair of lower frames 4022.

The plurality of support rods 4023 are erected in parallel between the pair of upper frames 4021 and parallel to each other between the pair of lower frames 4022.

The sewage tilt plate 4020 is tilted with respect to the pair of upper frames 4021 and the pair of lower frames 4022, and is attached to the pair of upper and lower support rods 4023.

As shown in FIG. 35, a plurality of sewage inclined plates 4020 (three in the figure) are arranged along the width direction F of the final settling basin P. In this case, for example, the upper frame 4021 and the lower frame 4022 located on the right side of the sewage inclined plate 4020 arranged on the leftmost side in FIG. 35 are the upper frame 4021 located on the left side of the sewage inclined plate 4020 in the middle. And may also serve as the lower frame 4022. Further, the upper frame 4021 and the lower frame 4022 located on the left side of the sewage inclined plate 4020 arranged on the rightmost side in FIG. 35 are the upper frame 4021 and the lower side located on the right side of the sewage inclined plate 4020 in the middle. It may also serve as the frame 4022.

The upper frame 4021 is supported by a hanging bolt 4031 from above, and the hanging bolt 4031 is fixed to a girder member 4032 arranged along the width direction F. The girder 4032 is fixed to the opposite wall surface Ps of the final settling basin P. Further, a plurality of girder members 4032 are arranged along the direction D as shown in FIG. 32. With such a configuration, the inclined plate device 4010 is supported so as to sink from the water surface of the water to be treated W to a predetermined depth and to secure a predetermined space between the inclined plate device 4010 and the bottom surface PB of the final settling basin P. There is.

The length of the blocking plate 4011 described above in the width direction is substantially the same as the width direction F of the final settling basin P. Further, in the vertical direction G, the position of the lower end 4011e of the blocking plate 4011 is preferably equal to or less than the position of the lower end 4020j of the sewage inclined plate 4020. As shown in FIG. 34, the blocking plate 4011 is supported by a hanging bolt 4033, and the hanging bolt 4031 is fixed to a girder member 4032 arranged along the width direction F.

(Sewage tilt plate 4020)
The sewage inclined plate 4020 is formed of a substantially square member. Hard vinyl chloride is preferable as the material of the inclined plate 4020 for sewage, but the material is not limited to this. The material of the inclined plate is, for example, a thermoplastic resin, for example, a vinyl resin such as polyvinyl chloride, a carbonate resin such as polycarbonate, an ester resin such as polyethylene terephthalate, an acrylic resin such as polymethyl methacrylate, polypropylene, polyethylene, etc. It may be an olefin resin, a styrene resin such as ABS, a copolymer or a mixed resin thereof, or a thermosetting resin such as an epoxy resin or an unsaturated polyester resin, and may be a metal, ceramic, or the like. It may be wood, rubber, or the like.

A plurality of inclined plates for sewage 4020 are arranged side by side so as to be inclined along the length direction (direction D) of the upper frame 4021 and the lower frame 4022. The inclined plate device 4010 is installed in the final settling basin P of the sewage treatment plant with the lower frame 4022 facing the bottom surface PB side of the final settling basin P. The second surface 4020b (described later) of the sewage inclined plate 4020 is directed toward the bottom surface PB side of the final settling basin P.

The sewage inclined plate 4020 is attached by being locked to the support rods 4023 arranged vertically by a plurality of hooks 4024.

As shown in FIGS. 36 (a) and 36 (b), the sewage inclined plate 4020 has a first surface 4020a, a second surface 4020b, an upper end 4020i, a lower end 4020j, and a first end 4020c. And a second end 4020d.

When the sewage inclined plate 4020 is attached to the pair of upper frames 4021, the pair of lower frames 4022, and the support rod 4023 described above, the upper end 4020i and the lower end 4020j are supported as shown in FIG. It is arranged substantially parallel to the rod 4023. Further, the upper end portion 4020i is arranged above the upper frame 4021, and the lower end portion 4020j is arranged below the lower frame 4022.

The first end portion 4020c and the second end portion 4020d are arranged so as to be inclined from the upper frame 4021 toward the lower frame 4022.

The plurality of inclined plates for sewage 4020 are arranged side by side along the direction D in which the water to be treated flows from the inflow portion 4014 into the final settling basin P. The plurality of sewage inclined plates 4020 are arranged so that adjacent sewage inclined plates 4020 face each other and are parallel to each other.

Specifically, as shown in FIG. 34, the plurality of sewage inclined plates 4020 are the first surface 4020a of one of the adjacent sewage inclined plates 4020 and the other sewage inclined plate 4020. The second surface 4020b of the above is arranged so as to face each other. Further, the positions of the lower end portions 4020j of the plurality of sewage inclined plates 4020 in the vertical direction G are substantially the same.

As shown in FIGS. 32 to 34, each sewage inclined plate 4020 is inclined so as to be located on the inflow portion 4014 side as it goes upward, and a pair of upper frames 4021, a pair of lower frames 4022, and a pair of lower frames 4022. It is supported by a plurality of support rods 4023. As shown in FIG. 34, the sewage inclined plate 4020 is arranged so that the upper end portion 4020i is located closer to the inflow portion 4014 than the lower end portion 4020j.

Further, the angle θa formed by the sewage inclined plate 4020 and the arrow D direction (corresponding to the horizontal direction in the present embodiment) in the side view is preferably 10 degrees or more and 70 degrees or less, and 60 degrees is particularly preferable. The angle θb formed by the sewage inclined plate 4020 and the vertical direction G is preferably set to 20 degrees or more and 80 degrees or less, and particularly preferably 30 degrees. Within this range, the effective sedimentation area of the solid-liquid separation system can be secured.

Sludge trapping treatment is performed on the second surface 4020b of the sewage inclined plate 4020 shown in FIG. 36 (a). Here, the sludge trapping treatment is a treatment for making the second surface 4020b of the sewage inclined plate 4020 into a state in which sludge easily stays so that the sludge in the water to be treated does not flow out from the final settling basin P. For example, by increasing the roughness of the surface of the inclined plate and forming unevenness in the direction along the movement of the sludge along the surface or in the direction orthogonal to the surface, the sludge easily adheres to the surface of the inclined plate. It can, but is not limited to. The method for roughening the surface is not particularly limited, but it may be mechanically processed by, for example, sandblasting, or it may be finely etched with a predetermined chemical or a mold with a predetermined surface roughness. It may be press working or the like. Further, the capture process may not be applied to the entire second surface 4020b.

It is preferable that the first surface 4020a on the opposite side of the second surface 4020b is a flat surface so that sludge can easily slide down.

The inclined plate 4020 for sewage can be produced by deformed extrusion molding, injection molding, etc., but extrusion molding is preferable.

Further, the second surface 4020b of the sewage inclined plate 4020 is provided with a groove 4020e along each of the first end 4020c and the second end 4020d. A hook hole 4020eb is formed in the groove portion 4020e, and the hook 4024 described above is mounted in the hook hole 4020eb. The sewage tilt plate 4020 is attached to the support rod 4023 of the tilt plate device 4010 by the hook 4024 mounted in the hook hole 4020 eb. Further, a ridge portion 4020f facing the groove portion 4020e is formed on the first surface 4020a.

(Measuring instrument 4018)
The measuring instrument 4018 measures the sludge concentration. The measuring instrument 4018 is attached to the inclined plate device 4010 by the mounting portion 4019, and is arranged between the inclined plate device 4010 and the bottom surface PB.

As the measuring instrument 4018, for example, an SS (Suspended Solids) meter or a turbidity meter can be used.

In the present embodiment, the measuring instrument 4018 is arranged in the vicinity of the lower end 4011e of the blocking plate 4011 as shown in FIG. 34. More specifically, in the inclined plate device 4010, it is arranged so as to overlap (overlap) with the inclined plate 4020 for sewage, which is arranged on the most side of the blocking plate 4011 in a plan view. Further, it can be said that the measuring instrument 4018 is arranged between the lower end portion 4020j of the sewage inclined plate 4020, which is arranged closest to the blocking plate 4011, and the blocking plate 4011 in the direction of arrow D.

In the present embodiment, the measuring instrument 4018 is arranged at the position shown in FIG. 34 as an example of the position where the sludge accumulated on the pond bottom PB is likely to be rolled up, but the sludge may be easily rolled up. For example, the position is not limited to the positions shown in FIGS. 32 and 34.

(Mounting part 4019)
The mounting portion 4019 mounts the measuring instrument 4018 to the inclined plate device 4010. The mounting portion 4019 has, for example, a hanging attachment 4041 and a hanging metal fitting 4042, as shown in FIG. 37. The hanging attachment 4041 is attached to the measuring instrument 4018. The measuring instrument 4018 has, for example, a cylindrical shape. The hanging attachment 4041 has a cylindrical shape, and a measuring instrument 4018 is inserted therein. The hanging metal fitting 4042 is connected to the hanging attachment 4041.

The hanging metal fitting 4042 has a chain 4042a, and the chain 4042a is fixed to the lower frame 4022 (not shown). Fixing of the chain 4042a to the lower frame 4022 can be performed by, for example, a wire or the like. By changing the length of the hanging metal fitting 4042 from the lower frame 4022, the position of the measuring instrument 4018 from the lower frame 4022 can be changed.

As shown in FIG. 34, where H is the distance in the vertical direction G from the lower end 4020j of the sewage inclined plate 4020 to the measuring instrument 4018, the hanging metal fitting 4042 can be adjusted between 100 and 1000 mm. The length of is provided. The hanging metal fitting 4042 functions as an adjusting mechanism for adjusting the position of the sewage inclined plate 4020 of the measuring instrument 4018 from the lower end portion 4020j.

FIG. 38 is a diagram showing another example of the mounting portion 4019, in which the mounting portion 4019 has a rod-shaped member 4051, a gantry 4052, two fixing members 4053, and two fixing members 4054. The rod-shaped member 4051 is arranged along the vertical direction G. The rod-shaped member 4051 is fixed to the lower frame 4022 (not shown). Fixing to the lower frame 4022 of the rod-shaped member 4051 can be performed by welding, bolts, wires, or the like. The gantry 4052 is fixed to the rod-shaped member 4051 by two fixing members 4053. The measuring instrument 4018 is fixed to the gantry 4052 by two fixing members 4054.

The two fixing members 4053 are U-shaped when viewed along the vertical direction. Each fixing member 4053 is arranged so as to surround the rod-shaped member 4051, and both ends thereof penetrate the gantry 4052.

Further, screw shapes are formed at both ends of the fixing member 4053, and bolts 4055 are fitted. By tightening the bolt 4055, the gantry 4052 and the fixing member 4053 sandwich the rod-shaped member 4051, so that the position of the gantry 4052 with respect to the rod-shaped member 4051 can be fixed.

Further, the distance H from the lower end portion 4020j of the sewage inclined plate 4020 to the measuring instrument 4018 can be adjusted by loosening the bolt 4055 and moving the gantry 4052 up or down in the vertical direction G (see the arrow). it can. In this way, the gantry 4052, the fixing member 4053, and the bolt 4055 function as an adjusting mechanism.

The two fixing members 4054 are U-shaped when viewed from the side. Each fixing member 4054 is arranged so as to surround the measuring instrument 4018, and both ends thereof penetrate the gantry 4052. The fixing member 4054 is provided on the surface of the gantry 4052 opposite to the fixing member 4053. Screw shapes are formed at both ends of the U-shape of the fixing member 4054, and bolts 4056 are fitted. By tightening the bolt 4056, the gantry 4052 and the fixing member 4054 sandwich the measuring instrument 4018, and the measuring instrument 4018 can be fixed to the gantry 4052.

(Sludge extraction part 4071)
The sludge extraction unit 4071 draws sludge from the sludge hopper 4017 to the outside of the final settling basin P as shown in FIG. 32. Some of the extracted sludge is returned to the aeration tank as, for example, return sludge, and the other surplus sludge is carried out via a mechanical concentrator, a sludge digestion tank, and the like.

The sludge extraction unit 4071 has a extraction pipe 4071a, a valve 4071b, and a pump 4071c. The pull-out pipe 4071a is connected to the sludge hopper 4017. The valve 4071b opens and closes the pull-out pipe 4071a. Sludge is extracted through the extraction pipe 4071a by driving the pump 4071c.

(Notification device 4072)
The notification device 4072 notifies the administrator based on the sludge concentration measured by the measuring instrument 4018. The administrator can check the on-site situation by listening to the notification information (alarm).

The notification device 4072 can use a speaker, a monitor, or the like, and may be vibration or the like as well as sound or light. In short, it is sufficient if the administrator can be notified that the sludge concentration has reached a predetermined threshold value.

When the notification device 4072 is remotely monitored, it may be installed in the monitoring facility or may be arranged in the vicinity of the final settling basin P.

(Control unit 4073)
The control unit 4073 has a processing unit such as a CPU (Central Processing Unit) and a main memory including a non-volatile memory such as a ROM (Read Only Memory) and a volatile memory such as a RAM (Random Access Memory). .. The control unit 4073 reads the program stored in the main memory and executes a predetermined process according to the program. Memory is an example of a recording medium that can be read by a non-transitory computer. The program may be distributed to the control unit 4073 via the network.

The control unit 4073 stores a predetermined threshold value. The predetermined threshold value can be set to, for example, 1000 mg / L, and the control unit 4073 drives the notification device 4072 to notify the administrator when the measured value by the measuring instrument 4018 becomes 1000 mg / L or more, and notifies the administrator of the valve 4071b and the pump 4071c. Drives to increase the amount of sludge extracted.

<Operation>
The operation of the solid-liquid separation system 4100 of the present embodiment will be described.

As described above, the water W to be treated that has flowed into the final settling basin P from the inflow portion 4014 is blocked by the blocking plate 4011 in the water flow direction (arrow D direction), and the lower end 4011e of the blocking plate 4011 and the final settling basin. It descends toward the portion of P between it and the bottom surface PB. At this time, since the area through which the water to be treated W passes is reduced by the blocking plate 4011, the flow velocity is increased.

The water W to be treated that has passed between the bottom PB of the final settling basin P and the lower end 4011e of the blocking plate 4011 becomes an upward flow J toward the water channel 4013, and the inclined plate for sewage from the lower portion 4010a of the inclined plate device 4010. It flows in and rises during 4020.

The sludge of the water to be treated W that has flowed into the inclined plate 4020 for sewage collides with the second surface 4020b and is trapped or settled while passing through the inclined plate device 4010, and settles on the first surface 4020a. .. The sludge settled on the first surface 4020a of the sewage inclined plate 4020 falls by its own weight as it is deposited and is deposited on the bottom surface PB.

Here, the flow blocking plate 4011 increases the flow velocity in the front stage portion of the inclined plate device 4010 (near the blocking plate 4011), but the flow velocity becomes slower in the rear stage portion (outflow portion 4015 side) of the inclined plate device 4010 and further sewage. Since the inclined plate 4020 for sewage acts as a resistor, the amount of water flowing between the inclined plates for sewage 4020 in the front stage portion is larger than that in the rear stage portion.

Therefore, as shown in the schematic view of FIG. 39, sludge M is more likely to accumulate below the front stage of the inclined plate device 4010 than other portions (see sludge collecting portion MP). Further, since the flow velocity becomes high in this portion, the sludge M is likely to be rolled up.

Then, when the value detected by the measuring instrument 4018 reaches 1000 mg / L, the control unit 4073 determines that the sludge M has been wound up, operates the notification device 4072, and controls the sludge extraction unit 4071 to control the sludge. Increase the amount of pulling out.

As described above, in the present embodiment, by arranging the measuring instrument 4018 above the portion where sludge tends to accumulate, it is possible to suppress the hoisting of sludge.

<Other embodiments>
Although the embodiments according to the present invention have been described above, the present invention is not limited to the above embodiments and can be appropriately modified without departing from the spirit of the present invention.

(A)
In the above embodiment, when the measured value of the measuring instrument 4018 reaches a predetermined threshold value, the sludge extraction amount by the sludge extraction unit 4071 is increased, but the sludge extraction unit 4071 does not have to be controlled and is notified. Only device 4072 may be operated.

(B)
Although the solid-liquid separation system 4100 of the above embodiment is provided with the notification device 4072, the notification is not limited to the notification, and the administrator may be notified that a predetermined threshold value has been reached. Further, a plurality of threshold values are set, and the administrator may be notified step by step.

Further, the measured value by the measuring instrument 4018 may be appropriately displayed on a monitor visible to the administrator.

(C)
The sewage inclined plate 4020 of the above-described embodiment may be divided into a plurality of inclined plates along the width direction F. FIG. 40 is a perspective view showing a sewage inclined plate 4020'divided into a plurality of inclined plates. The sewage inclined plate 4020' has a plurality of inclined plates 4060 and a connecting member 4061 arranged between adjacent inclined plates 4060. In the example shown in FIG. 40, three inclined plates 4060 and two connecting members 4061 are provided. The three inclined plates 4060 are arranged side by side along the width direction F so that the main surfaces are located on the same surface.

As shown in the enlarged view of the T portion, the connecting member 4061 is provided with an insertion portion 4061a into which the ends of the respective inclined plates 4060 are inserted. By inserting the end of the inclined plate 4060 into the insertion portion 4061a, the inclined plate 4020'for sewage can be formed. Any method may be used for fixing between the connecting member 4061 and the inclined plate 4060. For example, the connecting member 4061 and the inclined plate 4060 may be penetrated with the end of the inclined plate 4060 inserted into the insertion portion 4061a. Just insert a pin or the like into.

(D)
In the above embodiment, the sewage slope plate 4020 is supported by the support rod 4023 by the hook 4024, but the hook is not limited to the hook 4024, and a plurality of sewage slope plates 4020 can be arranged side by side. For example, the support method is not limited.

(E)
In the above embodiment, the measuring instrument 4018 is supported by the lower frame 4022, but is not limited to this, and may be fixed to the lower end of the blocking plate 4011, or the wall surface of the final settling basin P. It may be supported by a support for Ps (see FIG. 35).

(F)
In the above embodiment, the control unit 4073 and the notification device 4072 are described separately, but the control unit 4073 may be incorporated in the housing of the notification device 4072.

The solid-liquid separation system of the present invention exerts an effect capable of suppressing the roll-up of sludge, and is useful as a final settling basin of a sewage treatment facility.

In the final settling basin in which the inclined plate device is introduced as a measure against the water load as shown in Patent Document 1 described in (Background Technology), the amount of sludge flowing in is increased, and the sludge is captured by the inclined plate device and inclined. It is assumed that the sludge on the board slides down and accumulates on the bottom of the pond.

The sludge interface that collects on the bottom of such a pond was managed manually. Specifically, a rod-shaped member was inserted toward the bottom of the pond, and the position where sludge was attached to the member was visually recognized to control the amount of sludge accumulated in the pond. The accumulated sludge is removed by regular sludge withdrawal.

On the other hand, there is disclosed a technique of detecting sludge accumulated on the bottom of a pond with a sensor and automatically controlling a sludge scraper without using manual sludge management (see, for example, Japanese Patent Application Laid-Open No. 8-84902). ..

The inclined plate device for sewage shown in Patent Document 1 is an upward flow type, and the flow velocity in the lower part of the blocking plate is increased by installing the blocking plate in the inflow portion. Further, since the flow velocity of the front stage of the inclined plate device is faster than that of the rear stage, it is considered that the amount of water flowing into the inclined plate in the vicinity of the blocking plate increases and the amount of sludge deposited on the bottom of the pond increases locally. At such a position where the amount of sludge deposited locally increases, there is a concern that sludge may roll up because the flow velocity is high.

For example, in the technique shown in Patent Document 2, a blocking plate is not provided, and the inclined plate is arranged so as not to face the flow of flowing water (that is, as the inclined plate moves upward, it moves toward the outflow portion side. Since it is inclined so as to be located), it is unlikely that a local increase in flow velocity will occur.

Therefore, in the technique shown in Patent Document 2, it is not necessary to consider a local increase in flow velocity and an increase in sludge amount, and there is also a problem of sludge rolling up in a place where the flow velocity is locally high when the sludge interface rises. Not happening. Therefore, it is not known that the problem arises in the structure of the invention of the present application, and it can be said that the present application confirms the problem for the first time.

An object of the present invention is to provide a solid-liquid separation system capable of suppressing the rolling up of sludge.

A solid-liquid separation system that achieves the above object described in the embodiment can be described as the following invention.

(1)
Settling basin used for sewage treatment plant and
The inflow part where the water to be treated flows into the sedimentation basin and
The outflow part where the treated water flows out from the sedimentation basin and
It has a plurality of inclined plates, and the adjacent inclined plates are arranged so as to face each other and parallel to each other, and each of the inclined plates is inclined so as to be located on the inflow portion side as it goes upward. Board device and
A blocking plate arranged on the inflow portion side of the inclined plate device and
A measuring instrument, which is arranged between the bottom of the settling basin and the inclined plate device and measures the sludge concentration, is provided.
Solid-liquid separation system.

By providing the blocking plate and the inclined plate in this way, a local increase in the flow velocity and a local increase in the amount of sludge occur, but by providing a measuring instrument between the inclined plate device and the pond bottom, it is locally It is possible to detect an increase in the amount of sludge and suppress the roll-up of sludge.

(2)
The measuring instrument is attached to the inclined plate device so that the distance from the lower end of the inclined plate toward the bottom of the sedimentation basin can be adjusted within 100 to 1000 mm.
The solid-liquid separation system according to (1) above.

This makes it possible to adjust the measuring instrument to an appropriate position and suppress sludge from rolling up.

(3)
Notification device and
A control unit that operates the notification device when the measuring instrument detects a sludge concentration of 1000 mg / L or more is further provided.
The solid-liquid separation system according to (1) or (2) above.

This makes it possible to notify the administrator of the solid-liquid separation system, and the administrator can operate a sludge scraper or increase the amount of sludge drawn out to suppress sludge roll-up.

(4)
A pull-out part that pulls out sludge,
Further provided with a control unit that increases the amount of sludge extracted by the extraction unit when the measuring instrument detects a sludge concentration of 1000 mg / L or more.
The solid-liquid separation system according to (1) or (2) above.

As a result, by automatically increasing the amount of sludge drawn out, the sludge pool MP described later can be flattened, and the sludge can be suppressed from rolling up.

(5)
The measuring instrument is arranged in the vicinity of the blocking plate.
The solid-liquid separation system according to any one of (1) to (4) above.

As a result, the measuring instrument can be placed at a position where the flow velocity is increased by the blocking plate, and the sludge can be suppressed from rolling up.

According to the present invention, it is possible to provide a solid-liquid separation system capable of suppressing the rolling up of sludge.

The contents disclosed above may be described as follows.

(Embodiment 5)
Hereinafter, the solid-liquid separation system of the fifth embodiment according to the present invention will be described in detail with reference to the drawings.

(Embodiment 5a)
(Solid-liquid separation system 5001)
FIG. 41 is a side view of the lateral flow type solid-liquid separation system 5001.

The solid-liquid separation system 5001 of the present embodiment is used in a water purification facility as an example.

The solid-liquid separation system 5001 includes an inflow section 5011, a settling basin 5012, an outflow section 5013, an intermediate rectifying wall 5014, an inclined plate device 5015, a lower blocking plate 5016, and a side blocking plate 5017 (of the blocking plate). An example) and a hopper 5018 are provided.

In the landing well, the chemicals are injected into the raw water, and the water to be treated and the chemicals are stirred in the flow curator 5002.

In the inflow section 5011, the raw water and chemicals stirred in the flow curator 5002 flow into the settling basin 5012.

In the outflow section 5013, the treated water flows out from the settling basin 5012 to the trough 5003. The outflow section 5013 is provided on the opposite side of the inflow section 5011. Water flows from the inflow section 5011 toward the outflow section 5013. This water flow direction is indicated by an arrow D.

The intermediate rectifying wall 5014 is arranged substantially in the center of the settling basin 5012. For example, a plurality of openings are formed in the intermediate rectifying wall 5014 to suppress the occurrence of drift.

The inclined plate device 5015 is arranged on the downstream side of the intermediate rectifying wall 5014. The inclined plate device 5015 has a plurality of inclined plates 5020 as described later. The sludge contained in the water to be treated that has flowed between the inclined plates 5020 settles while passing through the inclined plate device 5015 and settles on the inclined plate 5020, and the water to be treated is purified. The sludge settled on the inclined plate 5020 falls by its own weight as it is deposited.

The lower blocking plate 5016 is arranged between the inclined plate device 5015 and the bottom surface 5012c of the settling basin 5012. The lower blocking plate 5016 is suspended and supported by the inclined plate device 5015.

The side blocking plate 5017, which will be described in detail later, is arranged between the inner side surfaces 5012a and 5012b (see FIG. 43) of the settling basin 5012 and the inclined plate device 5015. The side blocking plate 5017 causes the flow of water to be short-circuited between the side surface 5012a (an example of the first side surface) and the inclined plate device 5015 and between the side surface 5012b (an example of the second side surface) and the inclined plate device 5015. prevent.

The hopper 5018 is provided on the bottom surface of the settling basin 5012 and in the vicinity of the inflow portion 5011, and sludge is collected and discharged to the outside of the settling basin 5012.

(Inclination plate device 5015)
FIG. 42 is a perspective view showing a part of the inclined plate device 5015. FIG. 43 is a cross-sectional view taken along the line between AA'in FIG. 41.

The inclined plate device 5015 of the present embodiment is a transverse flow type settling device.

As shown in FIG. 42, the tilt plate device 5015 has a plurality of tilt plates 5020 and a support frame 5021.

(Inclined plate 5020)
The inclined plate 5020 is a quadrangular plate-shaped member, and its main surfaces (surfaces 5020a and 5020b) are arranged so as to be parallel to the water flow direction D. The inclined plate 5020 is supported by the width frame member 5022 so as to be inclined so that the position of the upper end 5020i in the vertical direction G is located on either side of the width direction F with respect to the position of the lower end 5020j.

The inclined plate 5020 is provided in four stages in the vertical direction G, for example, as shown in FIGS. 42 and 43. The plurality of inclined plates 5020 in each stage are arranged in parallel with each other. In FIG. 43, of the inner side surfaces facing each other in the width direction F of the settling basin 5012, the left side surface is 5012a and the right side surface is 5012b.

For example, each of the plurality of inclined plates 5020 in the first step from above is inclined so that the upper end 5020i is located on the side surface 5012a side of the lower end 5020j. Further, each of the plurality of inclined plates 5020 in the second stage from above is inclined so that the upper end 5020i is located on the side surface 5012b side of the lower end 5020j. Each of the plurality of inclined plates 5020 in the third stage from the top is inclined so that the upper end 5020i is located on the side surface 5012a side with respect to the lower end 5020j. Further, each of the plurality of inclined plates 5020 in the fourth step from the top is inclined so that the upper end 5020i is located on the side surface 5012b side of the lower end 5020j.

In this way, the inclined plates 5020 are arranged so that the inclined directions of the inclined plates 5020 of the adjacent steps are opposite in the vertical direction G.

Further, as shown in FIG. 42, in the water flow direction D, the inclined plates 5020 of the same stage are inclined in the same direction. For example, the inclined plate 5020 in the first row from the upper side and the second row from the upstream side shown in FIG. 42 has the upper end 5020i like the inclined plate 5020 in the first stage from the upper side and the first row from the upstream side. Is inclined so as to be located on the side surface 5012a side of the lower end 5020j.

Further, for example, with respect to the inclined plates 5020 arranged in the second and fourth stages from above, the extension line of the inclined plate 5020 is defined as L when viewed along the direction of arrow D as shown in FIG. 43, and the extension line L. The angle formed by the width direction F is θa, and the angle formed by the extension line L and the vertical direction G is θb. In this case, the angle θa is preferably 10 degrees or more and 70 degrees or less, and 60 degrees is particularly preferable. The angle θb is preferably set to 20 degrees or more and 80 degrees or less, and 30 degrees is particularly preferable. The inclined plates 5020 arranged in the first and third stages from above are arranged line-symmetrically with the inclined plates 5020 arranged in the second and fourth stages in FIG. 43.

Further, the inclined plate 5020 is formed of a substantially square member. As the material of the inclined plate 5020, PVC (polyvinyl chloride), particularly hard vinyl chloride, is preferable, but the material is not limited to this. The material of the inclined plate is, for example, a thermoplastic resin, for example, a vinyl resin such as polyvinyl chloride, a carbonate resin such as polycarbonate, an ester resin such as polyethylene terephthalate, an acrylic resin such as polymethyl methacrylate, polypropylene, polyethylene, etc. It may be an olefin resin, a styrene resin such as ABS, a copolymer or a mixed resin thereof, or a thermosetting resin such as an epoxy resin or an unsaturated polyester resin, and may be a metal, ceramic, or the like. It may be wood, rubber, or the like.

The inclined plate 5020 can be made by deformed extrusion molding, injection molding, etc., but it can be made by vacuum forming a flat plate with reinforcing ribs or the like by vacuum forming, or sludge trapping treatment by deformed extrusion molding. It is preferable to apply it to the back surface of the inclined plate.

Further, there is a specification that sludge trapping treatment is applied to the surface 5020b of the inclined plate 5020 facing the bottom surface 5012c of the settling basin 5012. Here, the sludge trapping treatment is a treatment for making the surface 5020b of the inclined plate 5020 into a state in which sludge easily stays so that the sludge in the water to be treated does not flow out from the settling basin 5012. For example, by increasing the roughness of the surface of the inclined plate and forming unevenness in the direction along the movement of the sludge along the surface or in the direction orthogonal to the surface, the sludge easily adheres to the surface of the inclined plate. It can, but is not limited to. The method for roughening the surface is not particularly limited, but it may be mechanically processed by, for example, sandblasting, or it may be finely etched with a predetermined chemical or a mold with a predetermined surface roughness. It may be press working or the like. Further, the capture process may not be applied to the entire surface 5020b.

The surface 5020a on the opposite side of the surface 5020b is preferably a flat surface so that sludge can easily slide down. It can be said that the surface 5020a is a surface facing upward in the vertical direction G.

(Support frame 5021)
The support frame 5021 supports a plurality of inclined plates 5020 in an inclined state as described above. As shown in FIG. 42, the support frame 5021 includes a plurality of width frame members 5022, a plurality of upper and lower frame members 5023, a plurality of frame material suspension members 5024, a plurality of inclined plate fixtures 5025, and a plurality of end plate receivers. It has a material 5026 and.

The width frame member 5022 and the upper and lower frame members 5023 are combined so as to form each step in the vertical direction G and each row in the water flow direction D of the inclined plate 5020 described above. The width frame member 5022 and the upper and lower frame members 5023 are combined so as to surround a plurality of inclined plates 5020 arranged along the width direction F.

The width frame member 5022 is arranged along the width direction F. Further, the width frame member 5022 is vertically arranged on both end sides in the water flow direction D of the plurality of inclined plates 5020 arranged along the width direction F.

The upper and lower frame members 5023 are arranged along the vertical direction G. The upper and lower frame members 5023 are arranged on the upstream side and the downstream side on both end sides in the width direction F of the plurality of inclined plates 5020 arranged along the width direction F.

The frame material suspension material 5024 is connected between the inclined plate fixtures 5025 arranged at equal intervals in the width frame members 5022 arranged adjacent to each other in the vertical direction G.

A plurality of inclined plate fixtures 5025 are arranged on each width frame member 5022. The inclined plate 5020 can be fixed to the inclined plate fixture 5025 with a pin or the like.

The end plate receiving material 5026 is arranged so as to connect adjacent upper and lower frame members 5023 at both ends in the width direction F. Each end plate receiving material 5026 is arranged along the water flow direction D. The end plate receiving member 5026 is arranged to support the inclined plates 5020 arranged at both ends in the width direction F.

Since the inclined plate device 5015 of the present embodiment is a lateral flow type settling device, a plurality of inclined plates 5020 are arranged so that the intervals between adjacent inclined plates 5020 are formed along the water flow direction D.

The inclined plate device 5015 is suspended from the settling basin 5012 by a plurality of girder members 5031 and a plurality of hanging bolts 5032. As shown in FIG. 43, the girder member 5031 is arranged along the width direction F. The girder 5031 is fixed to the side surface 5012a and the side surface 5012b of the settling basin 5012. Although omitted in FIG. 42, a plurality of girder members 5031 are provided along the water flow direction D.

The hanging bolt 5032 is supported by the girder member 5031 and locks the width frame member 5022 located at the uppermost position.

With such a configuration, the inclined plate device 5015 is suspended in the settling basin 5012.

(Downward blocking plate 5016)
As shown in FIG. 43, the lower blocking plate 5016 is arranged in the lower part of the inclined plate device 5015 along the vertical direction G. The lower blocking plate 5016 is arranged so as to face the water flow direction D. The lower blocking plate 5016 is arranged so that its main surface is parallel to the width direction F. The upper part of the lower blocking plate 5016 is fixed to the width frame member 5022 on the lowermost side, the upstream side (inflow portion 5011 side) and the downstream side (outflow portion 5013 side) of the inclined plate device 5015.

This makes it possible to suppress the flow of water short-circuited to the outflow portion 5013 through the lower side of the inclined plate device 5015.

(Side block 5017)
As shown in FIG. 43, the side blocking plate 5017 is arranged between the inclined plate device 5015 and the side surface 5012a and between the inclined plate device 5015 and the side surface 5012b.

FIG. 44 is a schematic view taken along the water flow direction D for explaining the side blocking plate 5017. In FIG. 44, the inclined plate device 5015 is shown in a simplified manner in order to make the configuration of the side blocking plate 5017 easy to understand. FIG. 44 shows a side block 5017 between the side surface 5012b and the tilt plate device 5015.

The side blocking plate 5017 is arranged so as to fill the gap B between the side surfaces 5012a and 5012b of the settling basin 5012 and the inclined plate device 5015. FIG. 45 is a schematic plan view showing a configuration in the vicinity of the side blocking plate 5017.

The side blocking plate 5017 is provided along the vertical direction G. Further, the side blocking plate 5017 is arranged so as to face the water flow direction D.

As shown in FIG. 45, the side blocking plate 5017 is fixed to the side surface 5012b and is in contact with the inclined plate device 5015.

In the present embodiment, the side blocking plate 5017 is formed of an elastic material. The elastic material is a material having elastic performance, and examples thereof include rubber and a spring-like member. As the elastic material used in the present embodiment, a rubber elastic material is preferable. The rubber material is a series of elastomer resins having a high elastic limit and containing an organic polymer as a main component, such as natural rubber and synthetic rubber. The elastic material used in the present embodiment may be a thermosetting elastomer such as styrene-butadiene rubber (SBR) or butyl rubber (IIR), or heat such as olifin-based, polybutadiene-based, and styrene-butadiene-based. It may be a plastic elastomer.

In the present embodiment, as shown in FIG. 45, the side blocking plate 5017 has a fixing portion 5041 and a protruding portion 5042. The fixing portion 5041 is fixed to the side surface 5012b. The projecting portion 5042 projects from the fixing portion 5041 toward the inclined plate device 5015. The side blocking plate 5017 is formed by a single loop-shaped plate-shaped member. The protrusion 5042 is a loop-shaped portion. The fixing portion 5041 is a portion in which both ends of the plate-shaped member are overlapped.

As shown in FIG. 45, a mounting member 5043 having an L-shaped metal angle with a cross section perpendicular to the longitudinal direction is fixed to the side surface 5012b. The L-shaped mounting member 5043 is formed by, for example, bending one plate-shaped member. The mounting member 5043 has a plate-shaped first portion 5043a and a plate-shaped second portion 5043b arranged at substantially right angles. The first portion 5043a is fixed to the side surface 5012b by anchor bolts. As a result, the second portion 5043b is arranged perpendicular to the side surface 5012a. A fixing portion 5041 is fixed to the second portion 5043b by a metal bolt 5044. Since the fixing portion 5041 is a portion where both ends of one plate-shaped member overlap, the bolts 5044 are arranged so as to penetrate the overlapped both ends and the second portion 5043b.

The protrusion 5042 is in contact with the inclined plate device 5015. The contact position of the protrusion 5042 in the inclined plate device 5015 comes into contact with the upper and lower frame members 5023 and the like.

It is preferable that the side blocking plate 5017 is provided longer in the vertical direction than the inclined plate device 5015 in the vertical direction G.

The side blocking plate 5017 may be fixed to the upper and lower frame members 5023 as shown in FIG. 46A. FIG. 46A is a schematic view showing a state in which the side blocking plate 5017 is fixed to the upper and lower frame members 5023.

In this case, the side blocking plate 5017 is fixed to the upper and lower frame members 5023 by using the fixing jig 5050 shown in FIG. 46B. FIG. 46B is a schematic plan view showing the upper and lower frame members 5023, the fixing jig 5050, and the side blocking plate 5017. The fixing jig 5050 is composed of two flat steel pieces 5051. FIG. 46C is a plan view of the flat steel 5051. FIG. 46D is a front view of the flat steel 5051.

A curved surface is processed on one end portion 5051a of the flat steel 5051 so that the upper and lower frame members 5023 can be sandwiched and attached. The fixing portion 5041 of the side blocking plate 5017 is fixed to the fixing jig 5050 by a metal bolt 5044. Since the fixing portion 5041 of the side blocking plate 5017 is a portion where both ends of one plate-shaped member overlap, the bolt 5044 has the overlapped both ends and the end portion 5051b of the two flat steel 5051s. It is arranged so as to penetrate.

At the end of one end 5051a, bolts 5052 are arranged so as to penetrate two flat steel 5051s. By fastening two flat steel 5051s with bolts 5052 and bolts 5044, the curved surface of each flat steel 5051 sandwiches the upper and lower frame members 5023, and the fixing jig 5050 is fixed to the upper and lower frame members 5023. To.

With this configuration, the fixed position of the side blocking plate 5017 can be fixed at an arbitrary position. Therefore, even when the side surface 5012b side has a structure in which it is difficult to fix the mounting member 5043, the side blocking plate 5017 can be appropriately fixed, so that good seismic resistance can be ensured.

In the present embodiment, the case where the shape of the upper and lower frame members 5023 is tubular is shown, and the shape of the fixing jig 5050 is defined by a shape that matches the shape of the members. When the upper and lower frame members 5023 have a flat plate shape, a polygonal shape, or a different shape, a fixing jig having a shape suitable for these shapes can be used.

The distance B between the inclined plate device 5015 and the side surface 5012b may be 50 cm or less, preferably 40 cm, and more preferably 30 cm or less. Further, the thickness T of the plate-shaped member forming the side blocking plate 5017 is preferably set to 1 cm to 3 cm.

Further, in the above description, the side blocking plate 5017 arranged between the inclined plate device 5015 and the side surface 5012b has been described, but the side blocking plate 5017 arranged between the inclined plate device 5015 and the side surface 5012a has been described. The 5017 has the same configuration, and is provided line-symmetrically with respect to the side blocking plate 5017 arranged between the inclined plate device 5015 and the side surface 5012b. That is, the side blocking plate 5017 arranged between the inclined plate device 5015 and the side surface 5012a is fixed to the side surface 5012a by the mounting member 5043 and is in contact with the inclined plate device 5015.

In the present embodiment, by using the side blocking plate 5017 as an elastic member, in addition to suppressing a short circuit of the water flow, it is possible to exert a cushioning function when the inclined plate device 5015 swings in the event of an earthquake.

Further, by using an elastic member for the side blocking plate 5017, the inclined plate device 5015 can be appropriately swung during sloshing, and the hydrodynamic pressure can be passed, so that the load applied to the inclined plate device 5015 is applied. Can be reduced.

In the present embodiment, the side blocking plate 5017 has a loop shape, but is not limited to this, and may be a plate-shaped member. FIG. 47 is a plan view showing a plate-shaped lateral blocking plate 5017'. The side blocking plate 5017'is a plate-shaped member, and the main surface 5017a' is arranged so as to be substantially perpendicular to the water flow direction D. The tip 5017b'of the side blocking plate 5017' is in contact with the inclined plate device 5015. The thickness T of the side blocking plate 5017'may be set to 2 cm to 5 cm, and preferably set to 3 cm to 5 cm.

(Action effect)
Lateral blocking plates 5017, 5017'(an example of blocking plate) intersect the water flow direction D between the side 5012a and the tilt plate device 5015 and between the side 5012b and the tilt plate device 5015, respectively. By forming the lateral blocking plates 5017 and 5017'with elastic members, the inclined plate device 5015 also swings with water during sloshing, but the side surfaces of the inclined plate device 5015 and the settling basin 5012. Collision with 5012a and 5012b can be avoided.

Further, since the side blocking plates 5017 and 5017'are arranged so as to intersect with the water flow, a short circuit of the water flow passing through the gap generated between the inclined plate device 5015 and the side surfaces 5012a and 5012b of the settling basin 5012. Can be suppressed.

In this way, it is possible to suppress a short circuit of the water flow due to a gap between the inclined plate device 5015 and the side surfaces 5012a and 5012b of the settling basin 5012, and to suppress the swing of the inclined plate device 5015 during an earthquake.

It is preferable to swing the inclined plate device 5015 appropriately at the time of sloshing. This is because the load applied to the inclined plate device 5015 can be reduced by receiving the hydrodynamic pressure due to sloshing rather than receiving it by the inclined plate device 5015.

Further, the side blocking plate 5017 has a fixing portion 5041 and a protruding portion 5042, and the fixing portion 5041 is fixed to the side surface 5012a or the side surface 5012b. The projecting portion 5042 projects from the fixing portion 5041 toward the inclined plate device 5015. As a result, the side blocking plates 5017 and 5017'can be fixed to the side surfaces 5012a and 5012b of the settling basin 5012, and the protrusion 5042 can cushion the inclined plate device 5015 against the swing.

Further, since the protruding portion 5042 is in contact with the inclined plate device 5015, the cushioning function against the swing of the inclined plate device 5015 can be more exerted.

Further, the distance B between the side surface 5012a and the inclined plate device 5015 and the distance B between the side surface 5012b and the inclined plate device 5015 are preferably 50 cm or less. Generally, the gap between the inclined plate device 5015 and the side surfaces 5012a and 5012b of the settling basin 5012 is set to 50 cm or less, and the lateral blocking plates 5017 and 5017 which are elastic members for the gap of 50 cm or less. By arranging ′, the swing of the inclined plate device 5015 can be appropriately buffered.

Further, the side blocking plate 5017 has a protruding portion 5042 (an example of a curved portion).

The swing of the inclined plate device 5015 can be received by such a bent protrusion 5042.

Further, the side blocking plate 5017 is formed of a plate-shaped member, and the protruding portion 5042 is a portion in which the plate-shaped member is formed in a loop shape. The thickness of the elastic member is preferably 1 cm to 3 cm.

As a result, the swing of the inclined plate device 5015 can be buffered by the loop-shaped protrusion 5042.

(Embodiment 5b)
Next, the upward flow type solid-liquid separation system 5100 according to the fifth embodiment will be described.

(Solid-liquid separation system 5100)
FIG. 48 is a diagram showing a solid-liquid separation system 5100 of the present embodiment. The solid-liquid separation system 5100 of the present embodiment is applied to the solid-liquid separation of the water to be treated W in the final settling basin 5101 of the sewage treatment plant.

As shown in FIG. 48, the solid-liquid separation system 5100 includes a final settling basin 5101 (an example of a settling basin), an inclined plate device 5110, an inflow portion blocking plate 5111, an overflow weir 5112, and a water channel 5113. It includes an inflow section 5114, an outflow section 5115, a sludge scraper 5116, a sludge hopper 5117, and a side blocking plate 5118 (see FIG. 51).

In the inflow section 5114, raw water (water to be treated W) flows into the final settling basin 5101. The outflow portion 5115 is provided on the opposite side of the inflow portion 5114 in the final settling basin 5101, and the purified water W to be treated flows out from the final settling basin 5101.

The inclined plate device 5110 is arranged in a portion downstream from the substantially central portion of the final settling basin 5101 (outflow portion 5115 side). The tilt plate device 5110 has a plurality of tilt plates 5120. The plurality of inclined plates 5120 are arranged side by side from the upstream side to the downstream side with the water surface side tilted toward the inflow portion 5114 side.

The inclined plate device 5110 is supported so as to sink to a predetermined depth from the water surface of the water to be treated W and to secure a predetermined space between the inclined plate device 5110 and the bottom surface 5101s of the final settling basin 5101. The inclined plate 5120 is supported by being suspended from a girder member. The details of the inclined plate device 5110 will be described in detail later.

The inflow portion blocking plate 5111 is provided on the upstream side (inflow portion 5114 side) of the inclined plate device 5110 and at a substantially central portion of the final settling basin 5101. The inflow portion blocking plate 5111 blocks the flow of the water to be treated W to the downstream side (outflow portion 5115 side) in the region from the water surface to a predetermined depth. The inflow portion blocking plate 5111 is arranged so that the main surface is substantially perpendicular to the direction of the water flow flowing in from the inflow portion 5114.

The overflow weir 5112 is arranged near the surface of the water to be treated W on the downstream side (outflow portion 5115 side) of the inflow portion blocking plate 5111. The overflow weir 5112 is formed along the direction from the upstream side to the downstream side.

The waterway (trough) 5113 is formed by being surrounded by an overflow weir 5112 and is connected to the outflow portion 5115. The overflow weir 5112 is not limited to this, and may have a structure in which a hole is formed in the pipe.

The water W to be treated that has flowed into the final settling basin 5101 from the inflow portion 5114 is blocked by the inflow portion blocking plate 5111 in the water flow direction (arrow D direction (an example of a predetermined direction)), and the lower end of the inflow portion blocking plate 5111. It descends toward the portion between the 5111e and the bottom surface 5101s of the final settling basin 5101. The water to be treated W that has passed between the bottom surface 5101s of the final settling basin 5101 and the lower end 5111e of the inflow portion blocking plate 5111 becomes an upward flow J toward the water channel 5113, and the inclined plate 5120 is formed from the lower portion 5110a of the inclined plate device 5110. Inflows and rises during.

Then, the sludge of the water to be treated W is settled while passing through the inclined plate device 5110, and is settled on the first surface 5120a of the inclined plate 5120 to purify the water to be treated W. The sludge settled on the first surface 5120a of the inclined plate 5120 falls by its own weight as it is deposited.

The sludge scraper 5116 is arranged near the bottom surface of the final settling basin 5101. Settled sludge M is deposited near the bottom surface of the final settling basin 5101. The accumulated sludge M is collected in the sludge hopper 5117 by rotating the sludge scraper 5116 clockwise on FIG. 48 and is discharged. The sludge scraper 5116 passes near the water surface on the upstream side of the inflow portion blocking plate 5111, and also scrapes suspended matter.

The sludge hopper 5117 is formed on the bottom surface of the final settling basin 5101 near the inflow portion 5114.

(Inclination plate device 5110)
FIG. 49 is a perspective view schematically showing a part of the configuration of the inclined plate device 5110. FIG. 50 is a side view showing the inclined plate device 5110 and the inflow portion blocking plate 5111. FIG. 51 is a cross-sectional view taken along the line between XX and FIG. 48.

As shown in FIG. 49, the tilt plate device 5110 includes a plurality of tilt plates 5120, a pair of upper frames 5121, a pair of lower frames 5122, a plurality of support rods 5123, a plurality of hooks 5124, and a plurality of hooks. It has an upper and lower frame 5125 (see FIG. 50).

The pair of upper frames 5121 are arranged along the direction D from the inflow portion 5114 toward the outflow portion 5115. The pair of upper frames 5121 are arranged parallel to each other.

The pair of lower frames 5122 are arranged along the direction D from the inflow portion 5114 toward the outflow portion 5115. The pair of lower frames 5122 are arranged parallel to each other. The pair of upper frames 5121 are arranged closer to the water surface than the pair of lower frames 5122. The upper frame 5121 and the lower frame 5122 arranged vertically on one side and the other side of the width direction F are connected by a plurality of upper and lower frames 5125 (see FIG. 50) arranged along the vertical direction G. There is.

The plurality of support rods 5123 are erected in parallel between the pair of upper frames 5121 and parallel to each other between the pair of lower frames 5122.

The inclined plate 5120 is attached to a pair of upper and lower support rods 5123 so as to be inclined with respect to a pair of upper frames 5121 and a pair of lower frames 5122.

As shown in FIG. 51, a plurality of inclined plates 5120 (three in the figure) are arranged along the width direction F of the final settling basin 5101. In this case, for example, the upper frame 5121 and the lower frame 5122 located on the right side of the inclined plate 5120 arranged on the leftmost side in FIG. 51 are the upper frame 121 and the lower frame located on the left side of the inclined plate 20 in the middle. It may also serve as 122. In this way, the adjacent inclined plates 5120 may also serve as a frame.

The upper frame 5121 is supported by a hanging bolt 5131 from above, and the hanging bolt 5131 is fixed to a girder member 5132 arranged along the width direction F. The girder member 5132 is fixed to the opposite side surfaces 5101a and 5101b of the final settling basin 5101. Further, a plurality of girder members 5132 are arranged along the direction D as shown in FIG. 48. With such a configuration, the inclined plate device 5110 is supported so as to sink from the water surface of the water to be treated W to a predetermined depth and to secure a predetermined space between the inclined plate device 5110 and the bottom surface 5101s of the final settling basin 5101. There is.

The length in the width direction of the inflow portion blocking plate 5111 described above is provided to be substantially the same as the width direction F of the final settling basin 5101. Further, in the vertical direction G, the position of the lower end 5111e of the inflow portion blocking plate 5111 is preferably equal to or less than the position of the lower end 5120j of the inclined plate 5120. As shown in FIG. 50, the inflow portion blocking plate 5111 is supported by a hanging bolt 5133, and the hanging bolt 5133 is fixed to a girder member 5132 arranged along the width direction F.

(Inclined plate 5120)
The inclined plate 5120 is formed of a substantially rectangular member. Hard vinyl chloride is preferable as the material of the inclined plate 5120, but the material is not limited thereto. The material of the inclined plate is, for example, a thermoplastic resin, for example, a vinyl resin such as polyvinyl chloride, a carbonate resin such as polycarbonate, an ester resin such as polyethylene terephthalate, an acrylic resin such as polymethyl methacrylate, polypropylene, polyethylene, etc. It may be an olefin resin, a styrene resin such as ABS, a copolymer or a mixed resin thereof, or a thermosetting resin such as an epoxy resin or an unsaturated polyester resin, and may be a metal, ceramic, or the like. It may be wood, rubber, or the like.

A plurality of inclined plates 5120 are arranged side by side so as to be inclined along the length direction (direction D) of the upper frame 5121 and the lower frame 5122. The inclined plate device 5110 is installed in the final settling basin 5101 of the sewage treatment plant with the lower frame 5122 facing the bottom surface 5101s side of the final settling basin 5101. The second surface 5120b (described later) of the inclined plate 5120 is directed toward the bottom surface 5101s of the final settling basin 5101.

The inclined plate 5120 is locked and attached to the support rods 5123 arranged above and below by a plurality of hooks 5124.

When the inclined plate 5120 is attached to the pair of upper frames 5121, the pair of lower frames 5122, and the support rod 5123 described above, the upper end 5120i and the lower end 5120j are abbreviated as the support rods 5123 as shown in FIG. Arranged in parallel. Further, the upper end 5120i is arranged above the upper frame 5121, and the lower end 5120j is arranged below the lower frame 5122.

Both ends of the inclined plate 5120 are arranged so as to be inclined from the upper frame 5121 toward the lower frame 5122.

The plurality of inclined plates 5120 are arranged side by side along the direction D in which the water to be treated flows from the inflow portion 5114 to the final settling basin 5101. The plurality of inclined plates 5120 are arranged so that adjacent inclined plates 5120 are opposed to each other and parallel to each other.

Specifically, as shown in FIG. 50, in the plurality of inclined plates 5120, the first surface 5120a of one inclined plate 5120 and the second surface 5120b of the other inclined plate 5120 face each other among the adjacent inclined plates 5120. It is arranged like this. Further, the positions of the lower ends 5120j of the plurality of inclined plates 5120 in the vertical direction G are substantially the same.

As shown in FIGS. 48 to 50, each inclined plate 5120 is inclined so as to be located on the inflow portion 5114 side as it goes upward, and a pair of upper frames 5121, a pair of lower frames 5122, and a plurality of inclined plates 5120. It is supported by the support rod 5123. As shown in FIG. 50, the inclined plate 5120 is arranged so that the upper end 5120i is located closer to the inflow portion 5114 than the lower end 5120j.

Further, the angle θc formed by the inclined plate 5120 and the arrow D direction (corresponding to the horizontal direction in the present embodiment) in the side view is preferably 10 degrees or more and 70 degrees or less, and 60 degrees is particularly preferable. The angle θd formed by the inclined plate 5120 and the vertical direction G is preferably set to 20 degrees or more and 80 degrees or less, and particularly preferably 30 degrees. Within this range, the effective sedimentation area of the solid-liquid separation system can be secured.

Sludge trapping treatment is performed on the second surface 5120b of the inclined plate 5120. Here, the sludge trapping treatment is a treatment for making the second surface 5120b of the inclined plate 5120 into a state in which sludge easily stays so that the sludge in the water to be treated does not flow out from the final settling basin 5101. For example, by increasing the roughness of the surface of the inclined plate and forming unevenness in the direction along the movement of the sludge along the surface or in the direction orthogonal to the surface, the sludge easily adheres to the surface of the inclined plate. It can, but is not limited to. The method for roughening the surface is not particularly limited, but it may be mechanically processed by, for example, sandblasting, or it may be finely etched with a predetermined chemical or a mold with a predetermined surface roughness. It may be press working or the like. Further, the capture process may not be applied to the entire second surface 5120b.

It is preferable that the first surface 5120a on the opposite side of the second surface 5120b is a flat surface so that sludge can easily slide off.

The inclined plate 5120 can be produced by deformed extrusion molding, injection molding, or the like, but extrusion molding is preferable.

A hook hole is formed in the inclined plate 5120, the hook 5124 is attached to the hook hole, and the inclined plate 5120 is attached to the support rod 5123 of the inclined plate device 5110 by the hook 5124 as shown in FIG. 49.

(Side block plate 5118)
Of the facing inner side surfaces of the final settling basin 5101, the left side surface in FIG. 51 is 5101a, and the right side surface is 5101b.

The side blocking plate 5118 is arranged between the inclined plate device 5110 and the side surface 5101a (an example of the first side surface) and between the inclined plate device 5110 and the side surface 5101b (an example of the second side surface). The lateral blocking plate 5118 is arranged along the D direction so as to intersect the upward flow J.

FIG. 52 is an enlarged view of the V portion of FIG. 51.

The side blocking plate 5118 is formed of an elastic material like the side blocking plate 5017 of the fifth a. The elastic material is a material having elastic performance, and examples thereof include rubber and a spring-like member. As the elastic material used in the present embodiment, a rubber elastic material is preferable. The rubber material is a series of elastomer resins having a high elastic limit and containing an organic polymer as a main component, such as natural rubber and synthetic rubber. The elastic material used in the present embodiment may be a thermosetting elastomer such as styrene-butadiene rubber (SBR) or butyl rubber (IIR), or heat such as olifin-based, polybutadiene-based, and styrene-butadiene-based. It may be a plastic elastomer.

The side blocking plate 5118 has a fixed portion 5141 and a protruding portion 5142. The fixing portion 5141 is fixed to the side surface 5101b. The projecting portion 5142 projects from the fixing portion 5141 toward the inclined plate device 5110. The side blocking plate 5118 is formed by a single loop-shaped plate-shaped member. The protrusion 5142 is a loop-shaped portion. The fixing portion 5141 is a portion in which both ends of the plate-shaped member are overlapped.

As shown in FIG. 52, a mounting member 5143 having an L-shaped metal angle with a cross section perpendicular to the longitudinal direction is fixed to the side surface 5101b. The L-shaped mounting member 5143 is formed by, for example, bending one plate-shaped member. The mounting member 5143 has a plate-shaped first portion 5143a and a plate-shaped second portion 5143b arranged at substantially right angles. The first portion 5143a is fixed to the side surface 5101b by anchor bolts. As a result, the second portion 5143b is arranged perpendicular to the side surface 5101b. A fixing portion 5141 is fixed to the second portion 5143b by a metal bolt 5144. Since the fixing portion 5141 is a portion where both ends of one plate-shaped member overlap, the bolts 5144 are arranged so as to penetrate the overlapped both ends and the second portion 5143b.

The protrusion 5142 is in contact with the inclined plate device 5110. The contact position of the protrusion 5142 in the inclined plate device 5110 abuts on the lower frame 5122 arranged at both ends in the width direction F.

It is preferable that the side blocking plate 5118 is provided at a length equal to or longer than the length of the inclined plate device 5110 in the D direction.

FIG. 53 is a schematic plan view showing the final settling basin 5101 and the side blocking plate 5118. As shown in FIG. 53, a convex portion 5101c is formed in a columnar shape on the side surface 5101b. Therefore, the protruding length of the lateral blocking plate 5118 is changed between the convex portion 5101c and the portion other than the convex portion 5101c. The side blocking plate 5118 may not be connected along the D direction, and may be divided into, for example, a portion of the convex portion 5101c and a portion other than the convex portion 5101c. In FIG. 53, the position of the inclined plate device 5110 is shown by a hatched portion.

Further, in the present embodiment 5b, the side blocking plate 5118 has a loop shape, but is not limited to this, and may be a plate-shaped member. FIG. 54 is a cross-sectional view showing a plate-shaped lateral blocking plate 5118'. The side blocking plate 5118'is a plate-shaped member, and the main surface 5118a' is arranged so as to face the upward flow direction J. The tip 5118b'of the side blocking plate 5118' is in contact with the inclined plate device 110.

(Action effect)
The side blocking plate 5118, 5118'(an example of the blocking plate elastic member) is placed between the side surface 5101a and the inclined plate device 5110 and between the side surface 5101b and the inclined plate device 5110 with respect to the water flow direction J. By forming the lateral blocking plates 5118 and 5118'with elastic members, the inclined plate device 5110 also swings with water during sloshing, but the inclined plate device 5110 and the final settling basin are arranged so as to intersect with each other. It is possible to avoid a collision with the side surfaces 5101a and 5101b of the 5101.

By swinging the inclined plate device 5110 in this way, the hydrodynamic pressure can be passed, so that the load applied to the inclined plate device 5110 can be reduced.

Further, since the side blocking plates 5118 and 5118'formed of the elastic members are arranged so as to intersect the upward flow J water flow, they also serve as a blocking plate, so that the inclined plate device 5110 and the final It is possible to suppress a short circuit of the water flow passing through the gap generated between the side surfaces 5101a and 5101b of the settling basin 5101.

In this way, it is possible to suppress a short circuit of the water flow due to a gap between the inclined plate device 5110 and the side surfaces 5101a and 5101b of the final settling basin 5101, and to suppress the swing of the inclined plate device 5110 at the time of an earthquake.

It is preferable to swing the inclined plate device 5110 appropriately at the time of sloshing. This is because the load applied to the inclined plate device 5110 can be reduced by receiving the hydrodynamic pressure due to sloshing rather than receiving it by the inclined plate device 5110.

It is possible to suppress a short circuit of the water flow and avoid a collision with the side surfaces 5101a and 5101b of the final settling basin 5101 of the inclined plate device 5110 during sloshing.

Further, the side blocking plate 5118 has a fixing portion 5141 and a protruding portion 5142, and the fixing portion 5141 is fixed to the side surface 5101a or the side surface 5101b. The projecting portion 5142 projects from the fixing portion 5141 toward the inclined plate device 5110. As a result, the side blocking plate 5118 can be fixed to the side surfaces 5101a and 5101b of the final settling basin 5101, and the protrusion 5142 can cushion the inclined plate device 5110 against the swing.

Further, since the protruding portion 5142 is in contact with the inclined plate device 5110, the cushioning function against the swing of the inclined plate device 5110 can be more exerted.

Further, the distance between the side surface 5101a and the inclined plate device 5110 and the distance between the side surface 5101b and the inclined plate device 5110 may be 50 cm or less, preferably 40 cm or less, and more preferably 30 cm or less. Generally, the gap between the inclined plate device 5110 and the side surfaces 5101a and 5101b of the final settling basin 5101 is set to 50 cm or less, and the lateral blocking plate 5118, which is an elastic member, with respect to the gap of 50 cm or less. By arranging 5118', the swing of the inclined plate device 5110 can be appropriately buffered.

Further, the side blocking plate 5118 has a protruding portion 5142 (an example of a curved portion).

The swing of the inclined plate device 5110 can be received by such a bent protrusion 5142.

Further, the side blocking plate 5118 is formed of a plate-shaped member, and the protruding portion 5142 is a portion in which the plate-shaped member is formed in a loop shape. The thickness of the elastic member is preferably 1 cm to 3 cm.

Thereby, the swing of the inclined plate device 5110 can be buffered by the loop-shaped protrusion 5142.

(Other embodiments)
Although the embodiments according to the present invention have been described above, the present invention is not limited to the above embodiments and can be appropriately modified without departing from the spirit of the present invention.

(A)
In the above embodiments 5a and 5b, the lateral blocking plates 5017, 5017', 5118, 5118' are formed of elastic members to suppress the swing of the inclined plate device 5015, 5110, but the lateral blocking plates 5017, 5017', 5118, 5118'. An elastic member for suppressing swing may be provided separately from the flow plate 5017.

In this case, in the fifth embodiment, the side blocking plates fixed to the side surfaces 5012a and 5012b are arranged on the upstream side and the downstream side of the inclined plate device 5015, and the above-mentioned is described between the inclined plate device 5015 and the side surfaces 5012a and 5012b. Elastic members may be arranged such as the lateral blocking plates 5017 and 5017'. Since this elastic member does not double as a blocking plate, it may be arranged not only in the vertical direction G but also in the D direction (horizontal direction). Further, the side blocking plate arranged on the upstream side of the inclined plate device 5015 does not have to be an elastic member.

Further, in the fifth embodiment, the side blocking plate is arranged below the inclined plate device 5110, and the side blocking plate 5118, 5118' described above is provided between the inclined plate device 5110 and the side surfaces 5101a and 5101b. An elastic member may be arranged in. On the side surface 5101b, an elastic member may be arranged on the convex portion 5101c. Since this elastic member does not double as a blocking plate, it may be arranged not only in the D direction (substantially horizontal direction) but also in the vertical direction G. Further, the side blocking plate arranged below the inclined plate device 5110 does not have to be an elastic member.

(B)
In the above embodiment 5a, only one side blocking plate 5017, 5017'is shown between the inclined plate device 5015 and the side surface 5012a, and only one is shown between the inclined plate device 5015 and the side surface 5012b. However, the present invention is not limited to this, and a plurality of lateral blocking plates 5017 and 5017'may be provided between them along the water flow direction D.

Further, in the above-described embodiment 5b, only one side blocking plate 5118, 5118'is shown between the inclined plate device 5110 and the side surface 5101a, and only one is shown between the inclined plate device 5110 and the side surface 5101b. However, the present invention is not limited to this, and a plurality of lateral blocking plates 5118 and 5118'may be provided between them along the vertical direction G.

(C)
In the above embodiments 5a and 5b, the side blocking plates 5017 and 5118 are formed in a loop shape as an example of the curved portion, but the present invention is not limited to this. However, from the viewpoint of contacting the inclined plate device 5015 and 5110, it is preferable that a curved portion is formed because the contact area increases.

(D)
In the above embodiments 5a and 5b, the inclined plates 5020 and 5120 are supported on the frame by the inclined plate fixtures 5025 and the hooks 5124, but the present invention is not limited to these, and a plurality of inclined plates 5020 and 5120 are arranged side by side. The support method is not limited as long as it can be arranged with.

(E)
In the above embodiments 5a and 5b, the lateral blocking plates 5017, 5017', 5118, 5118' are formed of elastic members to suppress the swing of the inclined plate device 5015, 5110, but the lateral blocking plates 5017, 5017', 5118, 5118'. An elastic member for suppressing swing may be provided separately from the flow plate 5017.

In this case, in the fifth embodiment, the side blocking plates fixed to the side surfaces 5012a and 5012b are arranged on the upstream side of the inclined plate device 5015, and the lateral side described above is provided between the inclined plate device 5015 and the side surfaces 5012a and 5012b. Elastic members may be arranged such as the flow blocking plates 5017 and 5017'. Since this elastic member does not double as a blocking plate, it may be arranged not only in the vertical direction G but also in the D direction (horizontal direction). Further, the side blocking plate arranged on the upstream side of the inclined plate device 5015 does not have to be an elastic member.

Further, in the fifth embodiment, the side blocking plate is arranged below the inclined plate device 5110, and the side blocking plate 5118, 5118' described above is provided between the inclined plate device 5110 and the side surfaces 5101a and 5101b. An elastic member may be arranged in. On the side surface 5101b, an elastic member may be arranged on the convex portion 5101c. Since this elastic member does not double as a blocking plate, it may be arranged not only in the D direction (substantially horizontal direction) but also in the vertical direction G. Further, the side blocking plate arranged below the inclined plate device 5110 does not have to be an elastic member.

(Example)
The solid-liquid separation system 5001 of the present embodiment will be described below with reference to Examples.

An experimental model of an inclined plate device was installed in a water tank imitating a settling basin under the conditions of Examples 1 to 12 and Comparative Example 1, and a vibration experiment was carried out by inputting seismic waves of earthquakes that occurred in the past. Seismic performance was confirmed.
(Evaluation of tilt plate device)
The result of grasping the defect status of the inclined plate device was used as the evaluation result.
The evaluation method is as follows.
Number of sloping plate defects: Good when 0 to 10 (○)
Number of sloping plate defects: Allowable range for 10 to 30 sheets (△)
Number of sloping plates missing: 30 or more and defective when destroyed (×)
In the first embodiment, the side blocking plate 5017 having a loop-shaped tip is formed of SBR or vinyl chloride, the separation B between the side surfaces 5012a and 5012b of the settling basin 5012 and the inclined plate device 5015 is set to 10 cm, and the side blocking is set to 10 cm. The thickness T of the flow plate 5017 was set to 1 cm. The results are shown in Table 1. As shown in Table 1, in the case of Example 1 / BR, the number of missing sheets was 10 or less, which was good.

In the second embodiment, the side blocking plate 5017 having a loop-shaped tip is formed of SBR or vinyl chloride, the separation B between the side surfaces 5012a and 5012b of the settling basin 5012 and the inclined plate device 5015 is set to 20 cm, and the side blocking is set to 20 cm. The thickness T of the flow plate 5017 was set to 1 cm. In this case, the number of missing sheets was 10 or less, which was good.

In the third embodiment, the side blocking plate 5017 having a loop-shaped tip is formed of SBR or vinyl chloride, the separation B between the side surfaces 5012a and 5012b of the settling basin 5012 and the inclined plate device 5015 is set to 30 cm, and the side blocking is set to 30 cm. The thickness T of the flow plate 5017 was set to 1 cm. In this case, the number of missing sheets was 10 or less, which was good.

In the fourth embodiment, the side blocking plate 5017 having a loop-shaped tip is formed of SBR or vinyl chloride, the separation B between the side surfaces 5012a and 5012b of the settling basin 5012 and the inclined plate device 5015 is set to 10 cm, and the side blocking is set to 10 cm. The thickness T of the flow plate 5017 was set to 1.2 cm. In this case, the number of missing sheets was 10 or less, which was good.

In the fifth embodiment, the side blocking plate 5017 having a loop-shaped tip is formed of SBR or vinyl chloride, the separation B between the side surfaces 5012a and 5012b of the settling basin 5012 and the inclined plate device 5015 is set to 20 cm, and the side blocking is set to 20 cm. The thickness T of the flow plate 5017 was set to 1.2 cm. In this case, the number of missing sheets was 10 or less, which was good.

In the sixth embodiment, the side blocking plate 5017 having a loop-shaped tip is formed of SBR or vinyl chloride, the separation B between the side surfaces 5012a and 5012b of the settling basin 5012 and the inclined plate device 5015 is set to 30 cm, and the side blocking is set to 30 cm. The thickness T of the flow plate 5017 was set to 1.2 cm. In this case, the number of missing sheets was 10 or less, which was good.

In the seventh embodiment, the side blocking plate 5017 having a loop-shaped tip is formed of SBR or vinyl chloride, the separation B between the side surfaces 5012a and 5012b of the settling basin 5012 and the inclined plate device 5015 is set to 20 cm, and the side blocking is set to 20 cm. The thickness T of the flow plate 5017 was set to 0.8 cm. In this case, the number of missing sheets was between 10 and 30, which was within the permissible range.

In the eighth embodiment, the side blocking plate 5017 having a loop-shaped tip is formed of SBR or vinyl chloride, the separation B between the side surfaces 5012a and 5012b of the settling basin 5012 and the inclined plate device 5015 is set to 35 cm, and the side blocking is set to 35 cm. The thickness T of the flow plate 5017 was set to 1 cm. In this case, the number of missing sheets was between 10 and 30, which was within the permissible range.

In the ninth embodiment, the side blocking plate 5017 having a loop-shaped tip is formed of SBR or vinyl chloride, the separation B between the side surfaces 5012a and 5012b of the settling basin 5012 and the inclined plate device 5015 is set to 35 cm, and the side blocking is set to 35 cm. The thickness T of the flow plate 5017 was set to 1.2 cm. In this case, the number of missing sheets was between 10 and 30, which was within the permissible range.

In the tenth embodiment, a plate-shaped lateral blocking plate 5017'is formed of SBR or vinyl chloride, the separation B between the side surfaces 5012a and 5012b of the settling basin 5012 and the inclined plate device 5015 is set to 10 cm, and the lateral blocking is set to 10 cm. The thickness T of the plate 5017'was set to 3 cm. In this case, the number of missing sheets was 10 or less, which was good.

In the eleventh embodiment, the plate-shaped lateral blocking plate 5017'is formed of SBR or vinyl chloride, the separation B between the side surfaces 5012a and 5012b of the settling basin 5012 and the inclined plate device 5015 is set to 15 cm, and the lateral blocking is set to 15 cm. The thickness T of the plate 5017'was set to 3 cm. In this case, the number of missing sheets was 10 or less, which was good.

In the twelfth embodiment, the plate-shaped lateral blocking plate 5017'is formed of SBR or vinyl chloride, the distance B between the side surfaces 5012a and 5012b of the settling basin 5012 and the inclined plate device 5015 is set to 10 cm, and the lateral blocking is set to 10 cm. The thickness T of the plate 5017'was set to 2 cm. In this case, the number of missing sheets was between 10 and 30, which was within the permissible range.

In Comparative Example 1, the side blocking plate was not placed. In this case, the number of defective inclined plates was 30 or more and the plate was destroyed, so that the plate was marked as defective (x).

As described above, it can be seen that the seismic resistance is improved by providing the side blocking plate 5017.
(Table 3)

The solid-liquid separation system of the present invention exerts an effect of suppressing a short circuit due to a gap between the inclined plate device and the inner wall of the settling basin and suppressing the swing of the inclined plate device during an earthquake, and purifies water. It is useful as a sedimentation basin for treatment facilities and sewage treatment facilities.

In water purification facilities and sewage treatment facilities, in order to promote solid-liquid separation, which is one of the water treatment processes, in sedimentation basins (mainly concrete water tanks, chemical sedimentation basins, coagulation sedimentation basins, and sewage treatment facilities in water treatment facilities. Is called the first settling basin and the final settling basin). The tilt plate device promotes solid-liquid separation by passing a water stream containing a suspension inside the inclined plate device.

When installing the inclined plate device in the settling basin, a gap is generated between both ends (side surfaces) of the inclined plate device and the inner wall of the settling basin due to restrictions on the installation work.

If this gap exists, the water flow does not flow into the inside of the inclined plate device, but short-circuits (bypasses) the gap with low flow resistance, so the solid-liquid separation capacity decreases.

Therefore, it is disclosed that a blocking plate protruding at a right angle to the water flow is provided as a method for closing the gap described above (see, for example, Utility Model Registration No. 3173772). Further, it is described that a soft synthetic resin such as rubber is used as the material of the blocking plate, and it is preferable to deform it depending on the flow velocity.

On the other hand, in the water and sewage business as well, the movement to make facilities earthquake-resistant is accelerating, and earthquake resistance is also required for newly adopted materials and equipment and machinery.

However, as described above, since there is a gap between the inclined plate device and the inner wall of the settling basin, a region where the inclined plate device vibrates is secured by the gap, and if an earthquake occurs in this state, the water surface swings. The tilt plate device may swing and come into contact with the inner wall of the settling basin and be damaged.

In order to prevent damage due to such an earthquake, a configuration in which a tilt plate device and a shock absorber are provided on the inner wall of the settling basin is disclosed (see, for example, Japanese Patent Application Laid-Open No. 2016-159199).

However, in Patent Document 1, the swing caused by the gap between the inclined plate device and the inner wall of the settling basin during an earthquake is not considered at all, and in Patent Document 2, the short circuit through which the water flow passes through this gap is not considered. No consideration was given.

The present invention provides a solid-liquid separation system capable of suppressing a short circuit due to a gap between the inclined plate device and the inner wall of the settling basin and preventing damage due to the shaking of the inclined plate device during an earthquake. The purpose.

A solid-liquid separation system that achieves the above object described in the embodiment can be described as the following invention.

(1)
A settling basin having a first side and a second side facing each other in the width direction intersecting the water flow.
An inclined plate device having a plurality of inclined plates and arranged in the settling basin,
A blocking flow formed by an elastic member arranged so as to intersect the water flow between the first side surface and the inclined plate device and between the second side surface and the inclined plate device. A solid-liquid separation system with a plate. As a result, the inclined plate device swings together with water during sloshing, but by providing a blocking plate made of elastic members, it is possible to avoid a collision between the inclined plate device and the side surface of the settling basin. Can be done.

Further, since the blocking plate is provided so as to intersect the water flow, it is possible to suppress a short circuit of the water flow passing through the gap generated between the inclined plate device and the inner wall of the settling basin.

In this way, it is possible to suppress the short circuit of the water flow due to the gap between the inclined plate device and the inner wall of the sedimentation basin, and to suppress the swing of the inclined plate device during an earthquake.

(2)
The blocking plate is
A fixing portion fixed to the first side surface or the second side surface,
It has a protrusion that protrudes from the fixed portion toward the inclined plate device.
The solid-liquid separation system according to (1) above.

As a result, the elastic member can be fixed to the side surface of the settling basin, and the protrusion can buffer the swing of the inclined plate device.

(3)
The protrusion is in contact with the tilt plate device,
The solid-liquid separation system according to (2) above.

As a result, the cushioning function against the swing of the inclined plate device can be more exerted.

(4)
The distance between the first side surface and the inclined plate device and the distance between the second side surface and the inclined plate device are 50 cm or less.
The solid-liquid separation system according to any one of (1) to (3) above.

Generally, the gap between the inclined plate device and the side surface of the settling basin is set to 50 cm or less, and by arranging an elastic member in this gap of 50 cm or less, the inclined plate device can be appropriately swung. Can be buffered.

(5)
The protruding portion has a curved portion.
The solid-liquid separation system according to (2) or (3) above. The swing of the inclined plate device can be received by such a curved portion.

(6)
The blocking plate is formed of a plate-shaped elastic member.
The protruding portion is a portion in which the plate-shaped member is formed in a loop shape.
The thickness of the elastic member is 1 cm to 3 cm.
The solid-liquid separation system according to (2) or (3) above.

As a result, the swing of the inclined plate device can be buffered by the loop-shaped protrusion.

According to the present invention, there is provided a solid-liquid separation system capable of suppressing a short circuit due to a gap between the inclined plate device and the inner wall of the settling basin and suppressing damage due to shaking of the inclined plate device during an earthquake. be able to.

The configurations of the above embodiments 1 to 5 may be combined as appropriate.

The solid-liquid separation system of the present invention exerts an effect of suppressing the unevenness of the flow rate in a plurality of inclined plates without reducing the effective sedimentation area, and is useful as a final sedimentation basin of a sewage treatment facility.

10: Inclined plate device 11: Blocking plate 12: Overflow weir 13: Waterway 14: Inflow part 15: Outflow part 16: Machine 17: Sludge hopper 18: Short-circuit flow prevention plate 19: Mounting member 20: Sewage inclined plate P : Final settling basin

Claims (13)

Settling basin and
An inclined plate device installed in the settling pond and having a plurality of inclined plates,
In a plan view, a plate-shaped member arranged so as to partially overlap the plurality of inclined plates,
With
The plate-shaped member is connected to the inclined plate device.
Solid-liquid separation system. The inflow part where the water to be treated flows into the sedimentation basin and
The outflow part where the treated water flows out from the sedimentation basin and
A blocking plate arranged on the inflow portion side of the inclined plate device is further provided.
The plate-shaped member is arranged on the outflow portion side of the blocking plate.
The plate-shaped member faces at least a part of the distance between the inclined plate arranged closest to the blocking plate and the blocking plate.
The solid-liquid separation system according to claim 1. The plate-shaped member has an opening.
The solid-liquid separation system according to claim 1. The opening has an area of 5 to 90% of the area of the plate-shaped member assuming that the opening is not formed.
The solid-liquid separation system according to claim 3. The plate-shaped member is connected to the inclined plate device so that the distance between the plate-shaped member and the lower end portion of the inclined plate can be adjusted between 0 and 1000 mm.
The solid-liquid separation system according to any one of claims 1 to 4. The inflow part where the water to be treated flows into the sedimentation basin and
Further provided with an outflow portion from which the treated water flows out from the sedimentation basin.
The inclined plate device is arranged between the inflow portion and the outflow portion by opening a predetermined lower space from the bottom surface of the sedimentation basin.
A water flow guide surface facing a part of the inclined plate is provided from a position exceeding the water surface of the water to be treated to the bottom surface of the inclined plate device.
The solid-liquid separation system according to claim 1. The water flow guide surface is a surface on the inflow portion side of the endmost inclined plate arranged on the inflow portion side, a surface on the inflow portion side of the provided blocking plate, or the endmost inclined plate. It also serves as one of the surfaces on the inflow portion side with the provided blocking plate.
The solid-liquid separation system according to claim 6. The length of the inclined portion of the water flow guide surface is 100 to 2000 mm, and the angle formed by the water flow guide surface in the horizontal direction is 20 ° to 70 °.
The solid-liquid separation system according to claim 6 or 7. A first support portion that supports the inclined plate device in the settling basin,
At least one second support portion for supporting the blocking plate in the sedimentation basin is provided.
The first support portion and the second support portion are separately fixed to the side wall of the settling basin.
The solid-liquid separation system according to claim 7. The inflow part where the water to be treated flows into the sedimentation basin and
Further provided with an outflow portion from which treated water flows out from the sedimentation basin.
The plurality of inclined plates are arranged side by side in a predetermined direction in the settling basin.
The plurality of inclined plates are arranged so that adjacent inclined plates are opposed to each other and parallel to each other.
Each of the inclined plates is inclined so as to be located on the inflow portion side toward the upper side.
At least a part of the inclined plates among the plurality of inclined plates has a main body portion and a bent portion provided at the lower end of the main body portion and bent with respect to the main body portion.
Assuming that the length of the bent portion projected in the predetermined direction is b and the distance between the inclined plates in the predetermined direction is c, 0.20 ≦ b / c ≦ 0.90 is satisfied.
The solid-liquid separation system according to claim 1. The bent portion is bent so as to extend from the lower end of the main body portion to the opposite side of the inflow portion.
The solid-liquid separation system according to claim 10. The spacing between the plurality of inclined plates is the same.
The solid-liquid separation system according to claim 10 or 11. The angle formed between the main body and the bent portion on the opposite side of the inflow portion of the inclined plate is 120 degrees or more and less than 180 degrees.
The solid-liquid separation system according to any one of claims 10 to 12.

Images