KR20080031772A - Sedimentation tank for water treatment - Google Patents

Abstract

The present invention relates to a sedimentation tank used in a water treatment facility for separating wastewater mixed with chemicals into sludge and purified water, and more particularly, a flotation prevention plate for supplying wastewater to a lower portion of the sedimentation tank and preventing sludge from floating upward. It is installed, having a structure equipped with a sand filter on the upper side, the action to increase the sludge sediment to the bottom, and the sludge suspended to the upper is finally filtered by the sand filter, the sedimentation tank for water treatment improved the purification capacity of waste water It is about.

According to the invention, the main body; Purification water tank is installed around the upper outside of the main body and the purification water discharge pipe is installed, containing the purified water flowing over the upper end of the main body; Sludge dust collection hopper installed inclined at the bottom of the main body, the sludge discharge pipe is installed; A wastewater inflow pipe installed perpendicular to the center of the main body and installed at a lower end of the main body; There is provided a sedimentation tank for water treatment, including a sand filter installed on an upper portion of the main body.

Description

A settling tank for a sewage disposal}

1 is a longitudinal cross-sectional view of the present invention;

FIG. 2 is a sectional view taken along the line “A-A” of FIG. 1.

3 is a detailed view of the screen cap used in the sand filter

※ Explanation of codes for main parts of drawing

1: main body 2: purified water discharge pipe

3: septic tank 4: sludge discharge pipe

5: sludge dust collection hopper 6: waste water inlet pipe

7: Sand filter 8a, 8b, 8c: floating prevention plate

9: sludge discharge water pipe 10: screen cap

11: lower support plate 12: screen

13: sand 14: washing tube

The present invention relates to a sedimentation tank used in a water treatment facility for separating wastewater mixed with chemicals into sludge and purified water, and more particularly, a flotation prevention plate for supplying wastewater to a lower portion of the sedimentation tank and preventing sludge from floating upward. It is installed, having a structure equipped with a sand filter on the upper side, the action to increase the sludge sediment to the bottom, and the sludge suspended to the upper is finally filtered by the sand filter, the sedimentation tank for water treatment improved the purification capacity of waste water It is about.

In a water treatment facility that cleans up wastewater containing various wastes and separates it into sludge and purified water, chemicals are injected to generate sludge in the chemical reaction tank, and the sludge and purified water are separated from the sedimentation tank.

That is, a sedimentation tank is provided to effectively remove debris and suspended turbid substances contained in the waste water, or a chemical treatment tank for treating sludge to promote the production of sludge.

Waste water mixed with chemicals or waste water without chemical treatment must be separated into sludge and purified water through a sedimentation tank. In such a sedimentation tank, sludge is settled by gravity and the purified water is discharged from the top.

In the implementation structure of the settling tank, the propeller installed on the shaft of the motor has a structure installed inside the main body so as to have a cylindrical main body as a basis, and to separate the water into sludge by creating a whirlpool. Such a structure is to slowly rotate the propeller to collect the sludge to the inner wall surface of the body and to drop it to the bottom to separate. However, a power source for driving a motor is required, and a large capacity sedimentation tank is needed to treat a certain amount of wastewater at a predetermined time.

In addition, a structure that naturally precipitates sludge by gravity has been developed, which inclines the sedimentation tank body so that the sludge is separated downward along the bottom slope. However, in order to settle the sludge, it is necessary to minimize the inflow of the waste water by lowering the inflow pressure of the waste water, and thus there is a problem that the treatment capacity is lowered.

An object of the present invention is to provide a structure to increase the supply pressure of the waste water so as to increase the treatment capacity even if the size of the sedimentation tank is small, preventing the sludge from floating in the purified water. Therefore, the present invention has a specific object of providing a structure in which the waste water is supplied to the bottom of the sedimentation tank, a plurality of sludge floating prevention plates are installed in the sedimentation tank, and a sand filter is installed on the upper portion.

Precipitation tank for water treatment according to the present invention and the main body (1); A purification water tank 3 installed around the upper end outer side of the main body 1 and provided with a purification water discharge pipe 2 for containing purified water flowing over the upper end of the main body 1; A sludge dust collecting hopper 5 installed at an inclined lower end of the main body 1 and provided with a sludge discharge pipe 4; A wastewater inflow pipe 6 installed vertically at the center of the main body 1 and installed at a lower end of the main body 1; It is configured to include; sand filter (7) provided on the upper portion of the main body (1).

The outer circumference of the waste water inlet pipe 6 is installed with a floating prevention plate (8a) horizontally or the outer end is inclined downward, and the floating prevention plate (8b) is installed horizontally on the inner side of the main body (1) The inner end is inclined downward; The anti-floating plate 8a and the anti-floating plate 8b are installed to be shifted in height from each other.

The sludge dust collection hopper 5 is provided with a plurality of sludge discharge water pipes 9, and has a structure in which the sludge attached to the inclined surface of the sludge dust collecting hopper 5 is sprayed to remove water.

The sand filter 7 includes a lower support plate 11 provided with a plurality of screen caps 10; A screen 12 installed on the upper portion of the lower support plate 11 at a predetermined interval; Sand 13 filled between the lower support plate 11 and the screen 12; It is installed in the sand 13, the washing tube 14 for washing the screen cap 10 by spraying high pressure water;

At the lower end of the wastewater inflow pipe 6, the floating prevention plate 8c is roundly installed so that the outer end thereof is inclined downward.

In the present invention configured as described above, the wastewater mixed with the chemicals in the wastewater intact or in the chemical reaction tank is introduced into the lower portion of the main body 1 through the wastewater inflow pipe 6. That is, the present invention is characterized in that waste water is introduced to be filled from the bottom of the main body (1). Therefore, the sludge contained in the waste water starts to be separated at the same time as the inflow of the waste water, the sludge falls to the lower sludge dust collection hopper 5, and the clear purified water is filled to the upper portion.

Since the floating prevention plate 8c is installed at the lower end of the wastewater inflow pipe 6, the sludge of the wastewater discharged to the lower end of the wastewater inflow pipe 6 is not immediately floated upward by the floating prevention plate 8c. You will have time to sit down.

As such, the sludge contained in the waste water drops and accumulates in the sludge dust collection hopper 5, and the waste water from which some sludge has been removed flows upward, but the sludge contained therein is again installed in the wastewater inlet pipe 6. It is filtered by 8a and the floating prevention plate 8b provided in the main body 1. As shown in FIG.

The floating prevention plates 8a and 8b are suitable for a structure in which a plurality of holes are drilled so that water from which sludge is removed can move freely upward. And the anti-floating plate (8a) (8b) has a structure in which the opposite end of the attached side is inclined downward to facilitate the collection of sludge.

And the floating prevention plate (8a) (8b) has an effect that is filtered several times by the difference in the height of each installed. That is, as shown in Figure 1, the wastewater inlet pipe (6) is installed inclined to prevent the sludge to be moved to the upper slant plate 8a, the flow through the hole or the end formed in the float plate 8a flows upwards Waste water to be removed is again removed by the floating prevention plate (8b) installed to the inside of the main body (1). In other words, the waste water stays for a predetermined time by the floating preventing plates (8a) (8b) installed in multiple stages to have a time for the sludge to settle.

Thus, the floating prevention plates 8a and 8b serve to separate the sludge by allowing the wastewater to stay for a predetermined time, and the wastewater passing through the floating prevention plates 8a and 8b is finely filtered by the sand filter 7. .

The sand filter 7 is composed of a screen cap 10 and sand 13 to filter the sludge of the waste water. That is, a plurality of screen caps 10 as shown in Figure 3 is installed in the lower support plate 11, to filter the sludge contained in the waste water, the waste water passing through the screen cap 10 is finally sand ( 13) the sludge is completely filtered out.

In this way, the waste water is sludge filtered and only clear purified water flows over the upper end of the main body 1 to the purified water tank 3 and is discharged to the purified water discharge pipe 2.

Sludge is accumulated in the sludge dust collection hopper 5 through the series of processes described above, and is discharged to the sludge discharge pipe 4 installed at the lower portion of the sludge dust collecting hopper 5. Further, in order to effectively remove sludge accumulated on the inclined surface of the sludge dust collection hopper 5, a plurality of sludge discharge water pipes 9 are provided on the inclined surface of the sludge dust collecting hopper 5. Therefore, when the sludge discharge water pipe (9) to send the wash water of the invention devised sludge is to be removed by the sludge discharge pipe (4). Of course, at this time it is preferable to discharge the sludge to the sludge discharge pipe 4 and at the same time to supply the high pressure washing water to the sludge discharge water pipe (9).

In addition, since the screen cap 10 and the sand 13 of the sand filter 7 may be blocked by sludge, it is necessary to periodically clean the sand. Therefore, the present invention has a structure in which a plurality of washing pipes 14 are installed in the sand 13 to remove the blockage by sending high-pressure washing water.

The present invention as described above can achieve the same efficiency while having a smaller size than the conventional sedimentation tank, because it is possible to supply a large amount of wastewater to the wastewater inlet pipe (6). That is, in the conventional case, a large capacity motor or propeller is used to purify a predetermined amount of wastewater, or by using a gradient sedimentation tank, the wastewater cannot be supplied to the sedimentation tank at a high pressure. By providing a plurality of means for preventing the floating in the furnace, even when sent at high pressure, the sludge does not flow into the upper purification tank (3).

Thus, in the present invention, the discharge end of the waste water inlet pipe 6 is located at the lower side of the main body 1, and the waste water is discharged from the lower part of the main body 1, and the stray prevention plates 8a, 8b and 8c provided in multiple stages are provided. Sedimentation of sludge is efficiently carried out by), and the sludge is finally filtered by the sand filter (7), so that not only the waste water is purified cleanly, but also when the waste water is sent to the settling tank at a high pressure, the sludge is purified water tank (3). It is prevented from mixing into the furnace, which improves the purification capacity of the waste water.

Claims (5)

A main body 1; A purification water tank 3 installed around the upper end outer side of the main body 1 and provided with a purification water discharge pipe 2 for containing purified water flowing over the upper end of the main body 1; A sludge dust collecting hopper 5 installed at an inclined lower end of the main body 1 and provided with a sludge discharge pipe 4; A wastewater inflow pipe 6 installed vertically at the center of the main body 1 and installed at a lower end of the main body 1; Sand filter (7) installed on the upper portion of the main body; 1, the sedimentation tank for water treatment. The floating prevention plate 8a is installed horizontally around the outer circumference of the wastewater inflow pipe 6 or the outer end is inclined downward, and the floating prevention plate 8b is provided on the inner side of the main body 1. It is installed horizontally or the inner end is inclined downward; The anti-floating plate (8a) and the anti-floating plate (8b) is a sedimentation tank for water treatment, the height is shifted from each other. The sludge collection hopper (5) is provided with a plurality of sludge discharge water pipes (9), the sedimentation tank for water treatment to remove the sludge attached to the inclined surface of the sludge collection hopper (5) by spraying water down. The sand filter of claim 1, further comprising: a lower support plate (11) provided with a plurality of screen caps (10); A screen 12 installed on the upper portion of the lower support plate 11 at a predetermined interval; Sand 13 filled between the lower support plate 11 and the screen 12; And a washing tube (14) installed in the sand (13) to spray the high pressure water to wash the screen cap (10). The sedimentation tank for water treatment according to claim 1, wherein a floating prevention plate (8c) is rounded at an outer end of the wastewater inflow pipe (6) so that its outer end is inclined downward.

Images