WO1983002769A1 - Water treatment apparatus - Google Patents

Abstract

Water treatment device having a separation tank (1A) having an inlet and an outlet for waste water in its lower part to float and separate the contaminants in the waste water, contaminants (2A) used to pass the used water from the basin through an inorganic agglomerating agent, an alkaline agent and a macromolecular agglomerating agent sequentially from the upstream side to the downstream side of a passage , an ascending passage for transporting the waste water from the agglomerator to the lower part, and a descending passage following the ascending passage, a tube (350) connected to the lower part of the ascending passage and serving to guide a fine foam mixed with water, a floating float and pressure sedimentation tank (3A) having a reservoir of floating contaminants above the rising passage, and a generator of foam mixed with water Ap re linked to the tube (350).

Description

 Details

 Title of invention

 Water treatment equipment

 Technical field

 5 The present invention relates to an improvement in a water treatment apparatus for sewage containing filth, for example, oil, BOD, COD.SS, and a melt (salt, pigment, etc.).

 Background art

In a conventional water treatment apparatus, for example, the separation, separation, and the like are performed by utilizing the buoyancy and sedimentation power of the filth itself, such as adhesion, sedimentation, and floating. Therefore, the treatment capacity is very poor, and the sludge removal rate is at most about 90%, so it is difficult to reach.Therefore, even if it is clean water, it must be diluted with water and then discharged. did not become. Also, in the by that 15 devices in the activated sludge system and required a very wide land to the installation you]? (For example, if the treated water 2,000 tz, had been required of about 6 6 0 w ² land The running cost was also very high. Before using this method, the processing time was about 24 hours, and the remaining

■.

 Due to the accumulation of accumulated sludge, it was necessary to stop the operation of the equipment once or twice a year for 20 cleaning.

 の Disclosure of the invention

 An object of the present invention is to improve the above drawbacks and to provide a water treatment apparatus having a high water purification capacity, a compact structure, a small installation area, and a low cost of footprint. Target.

OMPI -The present invention provides a separation tank having a sewage inlet and an outlet at a lower portion to float and separate sewage in the sewage, and allows the sewage from the separation tower to pass therethrough and from the upstream side of the flow path. A waste coagulation device in which an inorganic coagulant, an alkaline agent, and a polymer coagulant are sequentially injected to a downstream side, and an upward flow in which wastewater from the waste coagulation device is guided to a lower portion. And a downward flow path following the flow path, a fine bubble mixed water introduction pipe is connected to a lower part of the upward flow path, and a floating waste above the upward flow path described in §0. A water treatment apparatus characterized by including a pressurized flotation / sedimentation tank having a reservoir section, and a bubble mixed water generator connected to the fine bubble mixing / water introduction pipe.

 Therefore, the filth removal rate has been significantly improved, and the treated water has fallen below the water quality regulation value ¾, so that it can be discharged without being rarely diluted. In addition, the area required for installation of the equipment was minimized, and the cost of Rankin 'was significantly reduced. Therefore, in the present invention, the wastewater is treated while being moved, so that the treatment time is remarkably reduced, and almost no sludge sludge remains in the apparatus.

Brief description of the drawings

 FIG. 1 is a system diagram showing one embodiment of the present invention, FIG. 2 is a cutaway front view of a detached louver, FIG. 3 is a side view thereof, FIG. Fig. 5 is a vertical cross-sectional view of the bubble mixed fluid generator, Fig. 6 is a Vi-M end view of Fig. 5,

FIG. 7 is a cross-sectional view showing another embodiment of the separated fission body. The figure is a cutaway front view showing still another embodiment.

 BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

 As shown in FIG. 1, the present invention provides a separation tower 1A, an oil aggregating apparatus 2A, a pressurized floating sedimentation tower 3A, and a bubble mixing apparatus for generating and feeding bubble mixed water to the pressurized floating settling tank. Liquid generator A

Combine P and.

 However, as shown in FIGS. 2 and 3, the separation vessel 1A is a container having a bottomed rectangular tube having a sewage inlet 11a and a purified water outlet 11b on the bottom wall 11. The body 1 of the container, the cover 2 on the upper side of the body 1, the elbow 3 for discharging waste connected to the upper end of the cover 2, and the inlet 11a. And a support plate provided between the outlet 1 1b and the lower part of the main body 1 for dividing the lower part of the main body 1 into an inlet-side sewage rise area 1a and an outlet-side purified water descending area 1b (FIG. 2). It has a filth coarse-graining member 6 supported by the member 5 J9, a filth accumulation amount detection unit 7, a cleaning air pipe 8, and a drain pipe 9. The upper part of the main body 1] is the floating waste reservoir.

 However, according to the embodiment, the cover 2 is formed with two reduced diameter portions 2a and 2b that are stacked in a stepwise manner. That is, the first reduced diameter portion 2a is reduced in diameter so that the left and right side walls have an upward small diameter.

OMPI The horizontal step part 2 1 that prevents Then, in the center of the upper wall, a second shrinkable portion 2b having a side wall having a right cylindrical shape and a horizontal step portion 22 similar to that described above is attached with a gun. Furthermore, a large part of the elbow 3 having a different diameter is connected to the center of the horizontal step part 22 of the second reduced diameter part 2b. A waste pipe provided with a solenoid valve which is intermittently opened and closed, not shown, is attached to the small diameter portion of the elpo. A support member 5 is provided horizontally below the upper end of the partition plate 4 and a plurality of golds H ′ are superimposed on the support member 5. The coarse-grained member 6 (dirty water area 1 _a The side is Sa and the water purification area 1b side is 6b).

 The dirt accumulation amount detector 7 is composed of the first oil amount detector 7 1 and the second oil amount detector 72 using the electrode 7 a], the rear wall of the first reduced diameter portion 2 a and the tower body. It is protruding from the upper rear wall of and 1. A pair of left and right cleaning air pipes 8 are provided at the bottom of the tower body 1 and closed at both ends to form a U-shaped pipe 81 with a large number of air ejection holes 81a and attached horizontally. Air is supplied via the connecting member 82. Drain extubation

A pair of right and left 9 is provided on both bottom walls 11 sandwiching the partition plate 4.

 In the figure, 10a is a leg provided at the position 2 'of the bottom wall 11 in the pair line, 10b is a vibration damping member projecting from the separation tank, and 31 is an automatic exhaust valve. Mounting seat.

 Next, in FIG. 1, the oil aggregating device 2 A

ΟΗΡΙ A mixing device 2 10 in which a coagulant mixer 2 11, an aluminum coagulant mixer 2 12 and a polymer coagulant mixer 2 13 are provided side by side, and an inorganic coagulant pump 2 2 1, Alkali agent pump 2 2 2 and polymer flocculant pump 2 23, inorganic flocculant tank 2 3 1, Alkali agent tank 2 3 2 And a chemical tank 230 containing a polymer flocculant tank 2 33; Each of the mixers is sent from the separation filter, and flows from the upstream side to the downstream side according to the flow path of the liquid in which the oil remains, and the inorganic flocculant mixer 211 and the alkaline agent mixer 2 12 and the polymer flocculant mixer 2 13 are connected in series. The liquid proceeds in each of these mixers along the length direction. In each of the mixers, a number of baffles (not shown) are provided at right angles to the direction of travel of the liquid, and zigzag. A flow path is being formed. At the fluid inlet side of each mixer, inorganic coagulation fed through pumps 22 1, 22 22 and 23 from the various tanks 23 1, 23 32 and 23 33 respectively The supply pipes 241, 242, and 243 of the agent, alloy agent, and high molecular coagulant are connected and opened. The 2 shown! ^ The liquid supply line to the separation tower 1 A or al mixing device ₂ 1 0, 2 P 2 is Ru Ah in the feed tube to the next step.

Here, for example, aluminum chloride is used as the inorganic flocculant, and caustic soda is used as the alkaline agent. As a polymer flocculant, Acryl Lock A — 1 0.1 (trade name) mainly composed of acrylic polymer Organic agents such as Gaku Co., Ltd. (Tokyo) and polyacrylamide are suitable.

 As shown in Fig. 4, the pressurized floating sedimentation tank 3A is composed of a first cylinder 310, a second cylinder 320, a third cylinder 330, and a fourth cylinder whose outer shapes are vertical cylinders. 340, a bubble mixed water introduction pipe 350 connected to the first cylinder 310, and the second cylinder 3

O There is a waste discharge pipe 360 connected to the upper part and a sediment discharge pipe 370 connected to the lower part.

 The first cylinder 310 has a cylindrical shape with a bottom, a sewage supply pipe serving as the water inlet 311 is connected to the bottom wall, and a bubble-mixed water introduction pipe opening upward on the lower side wall. 350 is penetrated. The top of the first cylinder 310 is an open wastewater outlet 312.2. The second cylinder 320 is concentrically arranged with respect to the first cylinder 310 via a gap piece 320a, and the upper and lower ends thereof are opened. The second cylinder 320 has a lower portion disposed concentrically with the first cylinder, and an upper portion has a step 32 above the first cylinder 310. A large-diameter portion 3 23 is formed through 3 a, and a waste discharge pipe 360 is connected to the upper end of the floating material outlet 3 21.

 The third cylinder 330 is sheathed concentrically with respect to the second cylinder with a space therebetween, and the fluid outlet 331, at the upper end thereof, is provided with the large-diameter portion.

It is located below the peripheral wall of 3 2 3. At the lower part of the outlet 331, a flange 332 is provided outward from the upper end of the third cylinder. It is. The first cylinder 310 is passed through the center of the bottom wall 33 33 of the third cylinder 330. The lower part of the third cylinder 330 is a waste sedimentation chamber 330a, and a sediment discharge pipe 370 with an on-off valve with a waste outlet 333b opened in the bottom wall 333. Is connected.

 Further, the fourth cylinder 340 is covered with the third cylinder 340 left concentrically with respect to the third cylinder 340. The side wall 341, top wall 342, and bottom wall 343 of the fourth cylinder 340 also serve as the outer side wall of the pressurized floating tower 3. In the lower half of the fourth cylinder 340, an upper layer 340a of activated carbon or the like is provided on the receiving member 440 (below it, a large number of pores are provided on the lower surface below). The clean water outlet pipe 38 1 is connected via an annular water collecting pipe 38 0 having the following structure: 38 2 is a back washing water supply pipe connected to the other side of the water collecting pipe 38 0, 3 Reference numeral 83 denotes a backwash water discharge pipe provided on the top wall 34 of the fourth cylinder.

 The waste discharge pipe 360 is connected to the upper end of the second cylinder 320 and fixed to the top of the main body of the pressurized floating sedimentation tank. Then, in order from bottom to top, a right circular cylindrical part 361, which has the same diameter as the upper end of the second cylinder, a conical first constricted part 362, whose upper part has a reduced diameter, and a mysterious lipo-shaped part 2 Consists of a reduced diameter section 3 6 3. A solenoid valve (not shown), which is automatically opened and closed intermittently, is connected to the tip of the second shrinking part 363, and discharges the waste collected in the waste discharge pipe 360 intermittently. It is structured.

Discharge of waste '' The upper part beside the lower cylindrical part 36-1 of the pipe 360 The first and second oil detectors 390a and 390b are provided below.

 -Further, in Figs. 5 and 6, the bubble-mixed liquid generator Ap is composed of gas bubbles (air nozzles 410, liquid (water) nozzles 420) having concentric gas (air nozzles 410). A and a bubble stabilizing section 4B in which a first diverting section 44, a second diverting section 45-0, and a third diverting section 460 are formed inside the bubble-mixed water. It is composed of an air introduction pipe 480 and a bubble mixed water pressure adjusting tank 4C having a first pressure checking chamber 490.

In the bubble generating section 4A, the gas nozzle 410 has a horizontal gas ejection direction, and a male screw 411a into which the liquid nozzle 420 is screwed on the outer periphery of the tip is located at the center. A base portion 411 formed with a stepped air chamber 4 1 1b having a tapered taper, and an intermediate hole 4 1 2a connected to the air chamber 4 1 1b, and an unopened space following it. It is the same as the tip part 4 12 provided with the taper outlet 4 12 b. The liquid nozzle 420 has a long cylindrical shape along the center line, and has a water inlet hole 420a at the base. A liquid chamber 4 2 1 which communicates with the hole 4 2 0 a, and a non-wide tapered hole 4 2 2 formed from the liquid chamber 4 2 1 and concentric with the center line of the jet port 4 12 b. The liquid is formed such that the liquid flows from around the ejection port 412b toward the position immediately before the ejection port 412b and joins on the center line of the ejection port. At the base of the fluid nozzle 420 is the gas nozzle g I. A female screw 42 0a to be screwed with the 10 male screw 4 11a is provided. The four workers are packing.

The bubble generating section 4A has a taper angle of the ejection port 4 12b, and a ヽ⁰ angle of the Suehiro taper hole 4 22.

 1 2 b ^ perimeter extension surface and Suehiro Te-hole 4 2 2! ^ Let P be the virtual intersection with the peripheral surface and Q be the transition angle from the liquid chamber 42 1 to the Suehiro taper hole 42 2, Let L be the length up to the tip of the liquid nozzle 420, ^ i be the distance up to the virtual intersection P, and L be the distance up to the tip of the gas nozzle 410. The distance from the tip of the nozzle 410 to the center line of the water inlet hole 420a

 If it is 3, the following relational expression is formed between them.

 1 ° ≤ α ≤ 30 °

 1 ° ≤ ^ ≤30 °

 a> β

0 <£ _λ <L

 > o

£ ₅ > o

The transition corner Q is a smooth bevel so that the fluid becomes laminar.

 Here, since 1 ° ≤ α ≤ 30 °, the air nozzle

The jet air flow from 410 is a suehiro te

-Collision with the inner wall of the hole 4 2 2 generates a swirling flow,

O PI ' Mixing with water under pressure] 9 Air melts in water under pressure

I do. When the force A is smaller than the value of α by 1 °, the air jet does not collide with the inner wall of the hole 422 and penetrates the hole 422.

It's 30 °, right?]?

Without this, there is a risk that the flow will be approximately the same as the diameter of the intermediate hole 4 1 2a.

 Also, for 1 ° <≤ 30 °, the value of ^ is 1 °]?

Even if it is large, it is 30 degrees.

Is very low.

 This means that the blast air from the Suehiro taper orifice 4 12 b) collides against the inner wall of the Suehiro taper hole 4 22], and bubbles are generated erectly.

 Further, under the condition of 0 ≤ <L, the fluid flows while turning clockwise or counterclockwise in the divergent taper hole 422, and at this time, the water and the air are stirred, and the air is stirred. Melting in water

Will be done. Therefore, at the entrance of hole 4 2 2

A flow of fluid is formed.

 The following condition of 0 also contributes to the formation of a laminar flow of the fluid, and the liquid fills the liquid chamber 4 21 to obtain an average water flow to the hole 4 22 from the peripheral force of the ejection port 4 12 b. Can be

 The bubble stabilizing section 4B is a Suehiro tape of the bubble generating section 4A.

An outer cylinder 430 communicating with the hole 4222, and a flow direction perpendicular to the inflow direction of the bubble-mixed water from the divergent taper hole 422 provided inside the outer cylinder. To change

O PI

W 丄 IT Κ The first change portion 440, the second change portion 450, and the third change ¾460 are composed of strong obstruction members.

 That is, in the bubble stabilizing section 4B, the outer cylinder 430 has a horizontal axis and has a side wall 431 along the fluid inflow direction, and an end provided on the fluid inflow side of the side wall 431. J from wall 4 3 2 The end wall 432 is provided with a first inflow hole 432a for liquid at the center thereof. The first diverting portion 4440 is located on the inner upstream side of the outer cylinder 4330 and has a circular plate-like side (which is perpendicular to the fluid inflow direction) facing the liquid inlet hole 432a. A plate-like vertical member (fluid of fluid) that is in contact with a member 441 and a plurality of portions of the outer edge of the horizontal plate member 441 and is bonded to the horizontal member 441 ¾ the end wall 432. In the direction along the inflow direction), the gap between the vertical member 4 42 and the end wall 4 32 between the vertical member 4 42 and the end member 4 42 is the first liquid. It is a turning channel (Fig. 6).

The second changing portion 450 is provided at a middle portion of the outer cylinder 43 0, along the outer cylinder side wall 43 1 -a cylindrical vertical member 45 1, and an upper portion of the vertical member 45 1 The first horizontal member 452 connects the downstream end to the outer cylinder side wall, and the second horizontal member 453 closes the downstream end of the vertical member 451. The vertical member 45 1 is provided with a large number of horizontal holes 45 1 a, which are 変 2 diverting flow paths, in the periphery thereof, and the first vertical member 45 2 has a vertical member in the center thereof. The second inflow hole 452a into which the is closely fitted is opened. The second diverting hole 4 51 a is the vertical member 4 5 1 on the same circumference are provided at equal intervals and at equal intervals in the vertical direction ο

 The third turning part 460 is a first horizontal member 461 2 that partitions the inside of the outer cylinder on the inner and downstream side of the outer cylinder 430, and a plurality of ridges connecting these two horizontal members. The vertical member 463 and a plate-shaped third horizontal member 464 supported in the middle of the vertical member 463, and the first stacking member 461 At the center thereof, a 5 m inlet hole 461 a is provided, and at the center of the second horizontal member 462, a liquid outlet hole 462 a is provided. A portion other than the vertical member 464 before and after the third horizontal member 464 is a third variable R3 flow passage.The bubble mixed water pressure adjustment tank 4C has a bubble mixed water outlet 4 at the lower part. A second pressure regulating device consisting of a cylindrical side wall 4 7 1 having a vertical axis with 70 a ¾ and a top wall 4 7 2 having a valved air discharge hole 4 7 2 a and a bottom wall 4 7 3 The tank body 470, an inlet pipe 480 for receiving the bubble mixed water sent from the bubble stabilizer 4B provided therein, and a downstream part of the inlet pipe 480 are a And a first pressure regulating chamber 490.

 The introduction pipe 480 is installed at the lower part of the main body 470, and is connected to a horizontal cylindrical section 481, which opens on the inner and downstream sides of the outer cylinder 431 of the bubble stabilizing section 4B. A vertical cylindrical portion 482 that opens downward into the first pressure regulating chamber 490]). The horizontal cylindrical part 4 8 1 and the vertical cylindrical part

ΟϊνίΡΙ 482 is the part of the tank where the flow path is diverted.

 In the first pressure regulating chamber 490, the lower end of the vertical cylindrical side wall 491 concentric with the vertical cylindrical portion 482 and having a larger diameter than the cylindrical portion 482 is formed in the tank main body 470. The bottom wall 473 is made watertight, and the top is covered with a top 492 having a large number of injection holes 492a. In the figure, 4 7 4 is a pressure gauge mounting seat.

 The operation of the above will be described below. At the separation tower 1A, the water mixed with filth is subjected to pump pressure, and the inlet 11a! ) It is sent to the entrance side sewage area 1a in the tower. Of the contaminated waste in the sewage area 1a, large particles float through the wire mesh due to large buoyancy, and gather near the lower surface of the cover-2. 'On the other hand, fine filth with weak buoyancy is combined with other fine filth in the wire mesh 6a 廇 and coarsened, and the buoyancy increases and the levitation rises. The filth collected near the lower surface of the cover-2 is opened by a solenoid valve (not shown) openly.

However, during the above-mentioned discharge, the accumulated waste is separated because the elbow 3, especially the cover 2, has been reduced in diameter so that the lower part is largely opened and the upper part is reduced in diameter. Extruded over the entire area of the top. Also, in the case of a cover having such a shape, even when the separating fission is considerably troublesome, the water surface reaches the lower opening of the second reduced diameter portion 2b, and water is used instead of dirt. There is no fear of being pushed out. The water thus purified is discharged from the outlet lib through the water purification area 1b on the outlet side. The wire mesh 6b above the water purification area 1b serves as a waste filter so that coarse-grained waste is not discharged during this discharge.

The first detector 71 is filled with dirt near the lower surface of the cover 2, the water surface is lowered by the dirt, and the interface between water and the dirt reaches the position of the oil amount detector 71. It senses that it has dropped and opens the solenoid valve on the waste pipe. Also, the second oil detector 72 helps to control the opening of the solenoid valve when the interface is lowered to the installation height of the device, and thus the interface is always in contact with the first oil detector. It is maintained at a height between and the installation positions of the second oil detectors 71 and 72.

 The cleaning air pipe 8 injects air at the time of cleaning the inside of the separation tank, and causes air bubbles to associate with the oil component adhering to the inside of the tank and the filth coarsening member 6 to form an oil mass and float. This is to make it happen.

 According to the present invention, the mesh-like body layer in which the wire mesh, the synthetic resin mesh, the metal, and the synthetic resin woven body are laminated at random is used as the filth coarsening member 6, so that the conventional method is used. Compared to a system in which a large number of plates, pipes, etc. are combined and sewage is adhered to them, the sewage adhesion rate is lower and cleaning is easier.

O o

Next, in each mixing vessel 2 11, 2 1 2 2 1 3 of the oil coagulation device 2 A, each chemical is added at the inlet. Then, each chemical flows down in a zigzag manner in each of the mixers, and is mixed well with the liquid in this downflow to block the fine oil. Immediately, when polychlorinated aluminum is added to the liquid in the inorganic coagulant mixer 211, the oil in the liquid is coagulated, and the next alloy is formed. Then, the pH is adjusted to about 6.5 to 7.5, and in the final polymer coagulant mixer 2 13, the scattered fine particles are coagulated and strengthened in the block by a crosslinking action. Then, in the next step, the pressure floatation sedimentation separation fission, an oil mass of an appropriate size that is easy to separate is formed.

 In addition, in the pressurized flotation sediment Filo 3 A, the water mixed with the flocculed filth is subjected to a pump pressure, and from the sewage inlet 311 to the first cylinder 3. The water mixed with the fine bubbles is sent into the first cylinder through the bubble mixed water generator Ap at the same time. Therefore, air bubbles adhere to the waste in the first cylinder, the buoyancy of the waste is increased, and the waste is accumulated in the waste guide pipe · 360 through the large diameter portion 323. Then, the remaining water from which the dirt has been removed] flows down the second cylinder 320 from the top to the bottom, and the remaining heavy dirt is discharged into the waste sedimentation pipe 330a. Is deposited. The water proceeds further and passes through the third cylinder 340 from bottom to top and enters the fourth cylinder 340. The water that has proceeded to the fourth cylinder 340 is purified through the furnace superstructure 340a, collected in the water collecting pipe 380 provided at the lower part, and the clean water outlet pipe 381] ) leak.

O PI The filth floating and accumulating in the straight cylindrical portion 361, the first shrinkage portion 362, and the second shrinkage portion 3663 of the waste discharge pipe 360 is reduced to the second reduced diameter portion 366. When the solenoid valve C (not shown) provided at the end of 3) is intermittently opened, it is discharged by water pressure] 5. At this time, although the dirt outflow pipe 360 has a small diameter, it is further reduced in diameter along the dirt outflow direction. Water is not led out together. This applies even when the water treatment apparatus is mounted on a ship or the like, even when the pressurized floating sinking filter 3A is bothered to some extent as the ship shakes.

 In the first oil detector 390a, the filth outlet pipe 360 is filled with filth, the water surface is reduced by the filth, and the interface between water and the filth is the oil amount detector 3a. It senses that it has fallen to the position of 90a and opens the solenoid valve of the waste discharge pipe 360. Also, the second oil detector 390b serves to control the opening of the solenoid valve when the interface drops to the installation height of the detector. In this way, the interface is always maintained at a height between the first and second oil changers 3900a and 39Ob.

 Water is injected from the backwash water supply pipe 382 when washing the formation member in the fourth cylinder 3400, and the backwash water discharge pipe 383 is discharged. Is done. Both pipes are always closed.

The sediment discharge pipe 370 collects in the waste sedimentation chamber 330a. Opened when discharging precipitated sediment.

 In the above embodiment, the upper end of the first cylinder 310 may be located in the lower cylindrical portion 361 of the waste guiding pipe 360, or the number of the waste discharging pipe 360 may be small. It is sufficient if at least a part has an upper narrowed diameter portion, and the second reduced diameter portion 363 does not have a taper and may be an elliptical diameter.

 Next, when pressurized air is supplied to the gas nozzle 410 and pressurized water (at the same pressure as the air) is supplied to the liquid nozzle 42.0, the liquid inlet hole 420a is formed in the bubble generating section 4A. The water flowing into the liquid chamber 4 21 via the gas nozzle 4 is generated by the bubble expansion action in the divergent taper hole 4 22 by the jet air of the gas nozzle 4 10] 9. Then, the mixture is converted into fine bubble mixed water and sent to the bubble stabilizing section 4B. In the bubble stabilizing section 4B, the first bubble changing water pressure adjusting tank 4C passes through the first changing section 44, the second changing section 450, and the third changing section 460 according to the arrow F. In the change section, the bubble-mixed water collides with each of the obstructing members and repeats the direction change, so that the mixed water is stirred and the bubble-bonding is prevented. It will be finely divided. The bubble-mixed water enters the inlet pipe 480 in the next pressure adjusting tank 4 C and is deflected, and pulsation is prevented in the first pressure adjusting chamber 490 to regulate the pressure. Since the air is gradually injected from the injection holes 492a, the bubbles are not coarsened. The pressure adjustment tank 4C helps prevent pulsation of bubbles and mixed water sent to the next process. Nao

OMFI Excess air accumulates in the upper part of the body 470], and the discharge hole 472a is discharged to the outside.

 In this way, mixed water having fine bubbles, for example, 30 A, is instantaneously generated, and the bubbles are maintained stably without disappearing for a long time, for example, about one hour. You.

 Although not shown, the bubble generating section 4A and the bubble stabilizing section 4B may have their axes oriented vertically. In this case, the upper side of the bubble stabilizing section 4B is connected to the center of the bottom wall 473 of the pressure adjusting tank 4C, and a baffle plate is provided above the vertical inlet pipe 480, and the inlet pipe 48 The fluid from 0 hits the baffle and is diverted horizontally and enters the first control room 490.

 FIG. 7 shows a cross section of another embodiment in which the inside of the vessel of the separation tank 1A is partitioned by a cylindrical partition plate 40 and divided into an inlet sewage zone 1 and an outlet purification zone 1b. In this embodiment, a plurality of outlets 1 are inserted into a center of a sewage area 1a provided in the center of the casser body 1 and a plurality of outlets 1 in a water purification area 1b formed on the outer periphery of the partition plate 40. O with 1 b

FIG. 8 is a partially cut-away side view of an embodiment of a separation tower having two main bodies 10 A and 10 B capable of treating a large amount of sewage. That is, the 1st minute 0A and the 2nd minute filament 10B are connected by the connecting pipe 10 bent in a Z shape, and the original port 10a is located downward at the center of the first separation ellipse 0A. 、 The opening 10b is opened in the upward direction of the center of the second separated fission 10B. The front end 10 b is covered with a cap-shaped wire mesh 62. According to the structure of this embodiment, when sewage is introduced from the inlet 11a provided in the lower corner, the sewage rises and becomes coarse when passing through the wire netting 61. The sewage is sent to the second separation tower 10B via the connecting pipe 10 and is again passed through the cap-shaped wire netting 62 so that the coarse-graining action is imparted thereto. Purified water is available at outlet 1 1. The filth coarsened by the golds 61 and 62 is given buoyancy and collected in reduced diameters 邰 20 and 20, and is pumped and discharged through elbow-shaped discharge pipes 30 and 30, respectively. It is done. The reduced diameter portions 2 and 20 may not be stepped as shown in FIG. Also, discharge pipe 3

, 30 is a curved pipe that can prevent the upward flow of filth jets from blowing up in a straight line.

 According to the test example of this equipment, when the treated water is 200 tZ days, the filth removal rate is about 9.9% or more (can produce fresh water from seawater), and the installation area is about 60%. vf. Processing time is about 15 to 20 minutes] 3, and the running cost is about 1 / ¾ of that of the conventional one.

W IrO

Claims

Sought  (1) Wastewater entry and exit at the bottom with waste in the wastewater  Tank that floats and separates wastewater from the separation tank, and an inorganic coagulant, an alkaline agent, and a polymer coagulant are sequentially arranged from the upstream side to the downstream side of the flow path. A waste passage, an upward flow passage through which sewage from the waste agglomeration device is introduced into a lower part, and a downward flow passage which is hydrophobic. A pressurized floatation sink having a fine bubble mixed water inlet pipe read below the upward flow path and a float above the upward flow path having a #J reservoir; Bubble connected to a bubble mixed water inlet pipe; water treatment characterized by including a mixed water generator (2) Separation tanks collect sewage introduced from the lower sewage inlet.  A sewage rise area that guides the sewage to flow upward, and a sewage from the sewage rise area guides the sewage to flow downward and guides the sewage to flow downward, and is discharged from a lower water purification outlet. Claims 1 to 3 comprising: a falling water purification region as described above; and a floating filth reservoir provided above the rain region and having at least a part having an upper narrowing portion. Water treatment equipment (3) In the filth agglomeration device, from upstream to downstream of the flow path  Inorganic coagulant mixer, Al-mixer mixer and polymer coagulant mixer connected in series 【ノ I Inorganic flocculant pump and polymer flocculant pump connected to the fluid inlet side of the mixer, and the inorganic gun contacted to the suction side of each of these pumps 2. The water treatment apparatus according to claim 1, comprising a coagulant tank, an alkaline coagulant tank, and a polymer coagulant tank.  (4) Floating sedimentation, with sewage inlet at bottom and sewage at top  A first cylinder having an outlet, and a second cylinder having a fluid outlet at the lower end and a floating waste outlet at the upper end, the outer cylinder being concentrically spaced apart from the first cylinder with an interval left between the first cylinder and the first cylinder. Claims comprising: a waste discharge pipe having at least a part of an upper narrow diameter portion connected to an upper end of two cylinders; and a bubble-mixed water introduction pipe connected to a lower part of the first cylinder. The water treatment apparatus according to claim 1.  (5) The bubble-mixed water generator is installed on the gas nozzle and its periphery.  A liquid nozzle fitted therein] 9, in the liquid nozzle, the liquid from the gas nozzle surrounding the gas outlet of the gas nozzle is directed to the position immediately before the outlet from inside the gas outlet. A liquid chamber is formed on the outer periphery of the gas nozzle so as to merge with the core line, and includes a divergent tapered hole formed concentrically with the center line of the gas outlet from the liquid chamber. Claims  The water treatment device according to claim 1. v n 'J.