KR200369918Y1 - Advanced Gravity Clarifier for the Complete Formation of Sludge Blanket - Google Patents

Abstract

The present invention relates to a device for separating and removing particles contained in a liquid, and more particularly, in a gravitational sedimentation basin where solids contained in a liquid precipitate, so that the flow of the superaqueous layer and the sedimentation sludge layer move in the same direction. Sludge withdrawal unit for taking out the sludge precipitated in the is installed at the lower portion of the symbol water outlet located opposite the inlet inlet for the reaction liquid, the sludge drawing pump is installed adjacent to the sedimentation basin inlet, the suction port of the sludge drawing pump And the sludge withdrawal part communicates with the sludge suction pipe, or the sludge withdrawal pump is installed adjacent to the symbol water outlet of the sedimentation basin, and the suction port of the sludge withdrawal pump and the sludge withdrawal part communicate with the sludge suction pipe, and the sludge movement at the bottom of the sedimentation basin. Sedimentation to stabilize the sludge blanket by reducing the flow rate Bottom is directed to a gravity-type settling tank having improved settling efficiency By drawing out the take-off parts of the sludge more than two sets are spaced apart from each other by sludge installation.

Description

Advanced Gravity Clarifier for the Complete Formation of Sludge Blanket}

The present invention relates to an improved sedimentation basin for the smooth formation of sludge blanket and improved sedimentation efficiency in a biological sedimentation basin or a chemical flocculation sedimentation chamber, in which the flows of the supernatant layer and the sedimentation sludge layer move in the same direction and the turbulence formation is prevented at the outlet. .

Gravity sedimentation basin is mainly used for solid-liquid separation in sewage treatment plants, water purification plants or production processes. The conventional sedimentation basin is equipped with a sludge collector 107 driven by the driving unit 108 as in the rectangular sedimentation basin 101 of FIG. 1, and an inlet 102 and a distribution channel 109 are provided at the inlet 102. Is provided, the sludge drawing pump 105 and the sludge suction pipe 106, the conduit and pump chamber 110 is installed, the conduit is installed, the lower portion of the inlet (102) in which the reaction liquid from the reactor flows into the settling basin Sludge withdrawal unit 104 is provided, the supernatant water outlet 103 is configured to be installed on the opposite side of the sedimentation basin inlet (102).

As such, the sedimentation basin of the conventional method is provided with a sludge withdrawal unit 104 in the lower portion of the sedimentation basin inlet 102, the symbol water outlet 103 and the symbolic water outlet 111 is the inlet 102 and the sludge withdrawal As the reaction liquid is introduced into the inlet port 102 as installed on the opposite side of the part 104, the reverse flow in which the flow 113 of the supernatant separated from the solid solution and the flow 114 of the precipitated sludge layer flow in opposite directions from each other inside the sedimentation basin. It becomes a flow. As a result, vortices occur at the interface between the supernatant and the sludge sludge layers, sludge blankets cannot be formed smoothly, flocs can escape, or the surface area of the settling sludge must increase due to inefficient sedimentation. There is a problem that the solid concentration is lowered. This problem is the same situation occurs in the circular settler.

In addition, in the conventional sedimentation basin, the sludge accumulates as the sludge moves toward the sludge withdrawal along the bottom of the sedimentation basin, so that the solid flux increases and the sludge blanket rises near the symbolic water outlet, so the floc is discharged through the symbolic water outlet. Spills can cause deterioration of treated water quality.

In addition, in the conventional sedimentation basin, the sewage water and the sedimentation sludge collide with the wall at the lower part of the symbolic water outlet, so that turbulence and rising water are formed, which causes the pin floc to escape from the sludge blanket and the sedimentation efficiency is lowered.

In the conventional sedimentation basin, there was a case of preventing the formation of turbulence and rising water by attaching the rising water flow preventing plate 112 to the lower edge of the symbolic water outlet 103. However, since the conventional water flow preventing plate 112 is attached to the symbol water outlet 103 installed on the surface layer of the sedimentation basin, only the symbol water moving along the surface layer of the sedimentation basin is discharged to the symbol water outlet and the flow rate of the surface water. Is increased, and the symbol water reaching the lower portion of the rising water flow preventing plate 112 is mixed with the sludge again, and the distance of the inflow water from the surface of the sedimentation basin is reduced, so that the effective surface area of the sedimentation basin is reduced and the sedimentation capacity is reduced. to be. In particular, fine solids in the symbolic water may be deposited on the upper surface of the rising water preventing plate 112 to rise temporarily in the form of scum to worsen the treated water quality.

The present invention has been made in order to solve the above-mentioned problems, it is an object of the present invention to provide a sedimentation basin having a flocculation function by improving the solids removal efficiency by improving the backflow flow and turbulence generation problems in the sedimentation basin .

1 is a cross-sectional view of a rectangular sedimentation basin of the conventional method,

Figure 2 is a cross-sectional view of a first embodiment of the sedimentation basin is improved flow back flow of the sludge layer according to the present invention,

3 is a cross-sectional view of a second embodiment of the sedimentation basin with improved backflow flow of the sludge layer according to the present invention,

4 is a cross-sectional view of a third embodiment of the sedimentation basin with improved backflow flow of the sludge layer according to the present invention;

5 is a cross-sectional view of a fourth embodiment of the sedimentation basin with improved backflow flow of the sludge layer according to the present invention;

6 is a cross-sectional view of a fifth embodiment of the sedimentation basin with improved backflow of the sludge layer according to the present invention.

※ Explanation of symbols for main parts of drawing *

1,1a: sedimentation basin 2: inflow tank

3: distribution channel 4: pump chamber

5: symbolic water runoff 6: wall

11: inlet 12: symbolic water outlet

13,13a: Sludge extraction part 14,14a: Rising water flow prevention plate

15: scum skimmer 21: drive unit

22,22a: sludge collector 23: sludge drawing pump

23a: submersible pump 24: sludge suction pipe

25: sludge feed pipe 25a: removable device

26: sludge circulation pipe 27: nozzle

28: guide posts 29, 29a: agitator

31: Symbolic water flow 32: Sedimentation sludge flow

In order to achieve the above object, in the present invention, the sludge withdrawal part is a symbol located on the opposite side of the inlet through which the reaction solution flows from the reaction tank to prevent the sludge layer from being disturbed and the solids from escaping due to the backflow flow generated in the conventional sedimentation basin. By installing in the lower part of the water outflow part, the flow of the supernatant water layer and the settling sludge layer in the sedimentation basin is improved to move in the same direction.

The solid suspension mixture flowed into the sedimentation basin moves toward the sedimentation basin outlet, while the solid with a high specific gravity precipitates to form a sedimentation sludge layer and flows to the sludge withdrawal part located at the bottom of the sedimentation basin at the bottom of the symbolic water outlet, and withdraws to the outside. After being returned to the reaction vessel or removed as excess sludge, the solid liquid separated and purified supernatant flows out along the surface layer of the sedimentation basin and flows out through the supernatant outlet located on the upper side of the inlet.

Here, a cavity and a pump chamber are installed adjacent to the sedimentation basin inlet, and a sludge drawing pump is installed in the pump chamber, and the inlet port of the sludge drawing pump and the sludge extracting part are connected to communicate with the sludge suction pipe so that the sludge drawing part is connected by the sludge collector. By collecting the sludge collected in the sludge withdrawal pump to the outside of the sedimentation basin, the flow of the supernatant water layer and the sedimentation sludge layer in the sedimentation basin moves in the same direction.

As such, when the sludge withdrawal pump is installed at the inlet side of the sedimentation basin, the sludge suction pipe may be lengthened in a large capacity sedimentation basin, and thus the suction head may be insufficient. When the suction lift of the sludge suction pipe is insufficient for smooth sludge drawing in a large amount of sedimentation basin, the partial flow rate of the sludge pumped from the sludge drawing pump is sprayed toward the suction port of the sludge drawing pump through a nozzle installed in the sludge suction pipe. And by adding the suction lift by circulating, it is possible to increase the suction lift that is insufficient and to prevent sludge deposition in the sludge suction pipe.

The jetted water through the nozzle is not limited to sludge but can be replaced with treated sewage or general purpose water generated in the intestine.

When the sludge drawing pump and the pump chamber are installed adjacent to the symbol water outlet and the sludge drawing part of the sedimentation basin, and the inlet and the sludge drawing part of the sludge drawing pump are connected to the sludge suction pipe, the length of the sludge suction pipe can be shortened very short. Therefore, the problem of insufficient suction head can be easily solved.

A sludge drawing pump and a pump chamber are installed adjacent to the symbolic water outlet and the sludge outlet of the sedimentation basin, and the sludge discharge pump is configured as an underwater pump to be installed inside the sludge outlet and to directly suck the sludge by the underwater pump. Therefore, the problem of insufficient suction lift is solved, and it is economical because a separate pump room is not required.

The reaction liquid introduced into the sedimentation basin moves toward the sedimentation basin and the sludge withdrawal part, and collides with the wall where the superplastic resin outflow part and the sludge withdrawal part are located, or is disturbed, or a rising water is formed so that the solids rise and the sedimentation efficiency decreases. Since the problem may occur, the lower wall of the symbolic water outlet portion of the sedimentation basin has been improved to prevent the formation of turbulence and rising water by installing an inclined wall to be inclined to the outside as the water depth deepens.

In the present invention, in order to improve the sedimentation efficiency, a floc forming tank equipped with a stirrer was installed at all stages of the sedimentation basin inlet. It can be used as a floc forming tank by installing an agitation device in the inlet / outlet of the sedimentation basin or in the inlet tank.

In addition, in the present invention, two or more sludge outlets are installed at the bottom of the sedimentation basin so that the sludge blanket is prevented from rising from the lower part of the symbolic water outlet and the sedimentation sludge flow rate that moves to the lower layer of the sedimentation basin is settled. The sludge can be withdrawn. In particular, even in the case of a plurality of sludge withdrawal parts, the sludge is collected in a plurality of sludge withdrawal unit by one sludge collector.

In order to prevent the sludge layer from colliding at the lower wall of the supernatant outflow part and forming turbulence and rising to the outflow part, an upward flow prevention plate was installed at the lower wall of the supernatant outflow part at the upper part of the interface of the supernatant water and the settling sludge layer. The sludge collector was equipped with a sludge collector equipped with a function to remove the solids on the upper portion of the rising flow preventing plate so that the solids accumulated after the solids were deposited on the rising flow preventing plate to rise in the form of scum and deteriorate the treated water. .

In addition, the symbolic water outflow portion installed on the upper side of the rising flow preventing plate is separated from the sedimentation basin wall and provided with overflowware on both sides, so that the entire surface of the sedimentation basin is effectively used for solid-liquid separation and the overflowware load is also reduced.

Hereinafter, an embodiment of the sedimentation basin according to the present invention will be described in detail according to the accompanying drawings.

2 is a conceptual diagram related to a first embodiment of the sedimentation basin according to the present invention.

On the inlet 11 side of the sedimentation basin 1 in which the sludge collector 22 driven by the drive unit 21 is built, a sludge drawing pump 23, a sludge suction pipe 24, a sludge pressure pipe 25, and a conduit tube are built in. In the sedimentation device is provided with a common cavity and pump chamber (4), the inlet tank (2) and the distribution channel (3), the flow of the supernatant water layer 31 and the flow of sedimentation sludge layer (32) inside the sedimentation basin (1) In order to move in the same direction, the sludge withdrawal unit 13 of the sedimentation basin 1 is the symbol water outlet 12 and the symbolic water outlet channel which are located on the opposite side of the sedimentation basin inlet 11 through which the reaction liquid flows from the reaction tank ( 5, the lower portion of the sludge drawing pump 23 is an embodiment in which the intake port and the sludge drawing portion 13 communicates with the sludge suction pipe 24.

In the large capacity sedimentation basin, as the length of the sedimentation basin 1 becomes longer, the length of the sludge suction tube 24 also becomes longer, so as to solve the problem of insufficient suction lift, the sludge drawing pump 23 in the sludge drawing pump 23. Example of drawing out the flow rate of the sludge that is pumped through the) to the inlet side of the sludge drawing pump 23 through the nozzle 27 installed in the sludge suction pipe 24 through the sludge circulation pipe 26 to circulate Indicates. The nozzle 27 installed inside the sludge suction pipe 24 serves as a jet pump operated by the discharge head of the sludge drawing pump 23, and the sludge drawing pump 23 by the suction force of the jet pump. The suction head of the replenishment is configured to prevent the reduction of the diameter due to sludge deposition inside the sludge suction pipe 24.

In the gravitational precipitation, as the particle size increases, the precipitation rate increases and the pin floc generation decreases, so that the solids in the reaction solution form flocs so that the precipitation efficiency is improved. It is preferable to provide a formation tank. This embodiment shows an example in which a floc forming tank is formed by providing stirring devices 29 and 29a inside the inflow water tank 2 and the inflow distribution channel 3.

The symbolic water outflow part to reach the lower part of the symbolic water outflow part 12 and collide with the wall 6 to prevent the formation of turbulent and rising water flows is formed. The lower wall 6 of (12) was provided with an upward flow prevention plate 14 to prevent the rise of the settling sludge. Here, the sludge collector 22 was configured to remove solids deposited on the upper surface of the rising flow preventing plate 14 because solids may be deposited and floated in the rising flow preventing plate 14 to deteriorate the treated water. . The rising water preventing plate 14 is installed at an appropriate depth of the lower portion of the symbol water outlet 12 so that the symbol water collection amount can be increased, and the symbol water outlet 12 is spaced apart from the wall 6. By installing the overflow wear on both sides, since the symbol water flows on both sides, the overload wear is reduced and the surface of the sedimentation basin can be fully utilized for solid-liquid separation.

In some cases, the inclined rising water flow prevention plate is attached to the lower front edge of the symbolic water outlet in the conventional sedimentation basin, but in this case, the effective effective area of the sedimentation basin and the cross-sectional area in which the symbolic water moves are reduced, and the overflowware load is also increased. There was a problem that the solids are deposited and injured and leaked, but the present invention shows that these problems are solved.

3 is a conceptual diagram related to a second embodiment of the sedimentation basin according to the present invention.

In this embodiment, the cavity and the pump chamber (4) is installed adjacent to the symbolic water outlet (12) and the sludge outlet (13) located on the opposite side of the inlet (11), the pump chamber 4 in the sludge drawing pump ( 23) is installed, and the suction port of the sludge drawing pump 23 and the sludge withdrawal unit 13 is in communication with the sludge suction pipe 24 to suck and transport the sludge.

In this embodiment, since the length of the sludge suction pipe 24 is shorter than in the first embodiment, the sludge suction head is reduced, and there is an advantage that the sludge suction pipe 24 can be used without limitation in a large capacity sedimentation basin.

By installing the lower wall 6 of the symbolic water outlet 12 of the sedimentation basin 1 to be inclined to the outside as the water depth deepens, the symbolic water flow 31 and the precipitated sludge stream 32 collide with the wall. Disturbance and rising water flow of the sludge blanket is suppressed and the sedimentation efficiency is improved.

4 is a conceptual diagram related to a third embodiment of the sedimentation basin according to the present invention.

In this embodiment, the sludge drawing pump is composed of a submersible pump, and an underwater pump 23a is installed inside the sludge extracting unit 13, and the sludge collected in the sludge extracting unit 13 by the sludge collector 22 is submerged. It is a structure which directly sucks by the pump 23a, and transfers it to the exterior. It is preferable to include a desorption apparatus 25a and a guide post 28 at the connection portion of the discharge port of the submersible pump 23a and the sludge pump tube 25 to facilitate lifting and installation of the pump.

The submersible pump 23a may be installed inside the sedimentation basin, but by installing only the outer wall 6 of the sedimentation basin 1 as in this embodiment, the supernatant water outlet 12 and the outflow channel 5 and the wall ( 6) and as the depth of the sludge is increased by the sedimentation sludge withdrawal unit 13, the moving distance of the sludge increases step by step, so that the flow of the symbol water 31 and the stream of the sedimentation sludge collide with the wall to form an upward stream. Can be minimized. In addition, the lower wall of the symbolic water collecting portion may be inclined outward of the sedimentation basin.

5 is a conceptual diagram of a fourth embodiment of the sedimentation basin according to the present invention.

In addition to the sludge withdrawal unit 13 installed in the lower part of the supernatant water outlet 12, one or more sets of sludge withdrawal unit 13a are added to the sedimentation basin between the sedimentation basin inlet 11 and the sludge withdrawal unit 13. And the sludge outlets 13 and 13a are connected to the inlet port of the sludge outlet pump 23 and the sludge suction pipe 24 so that sludge is withdrawn from each of the sludge outlets 13 and 13a. . In this embodiment having a plurality of sludge take-outs 13 and 13a, the sludge collector 22 collects sludge.

In this embodiment, the sedimentation sludge is withdrawn from the plurality of sludge withdrawal units 13a, so that the flow rate of sedimentation sludge is reduced, so that the horizontal flow rate and vortex of the sedimentation basin are reduced, and solid matter is prevented from the symbolic water outlet 12, so that the sedimentation efficiency is increased. Can be improved.

In this embodiment, the symbolic water flow 31 and the settling sludge stream 32, which have reached the bottom of the symbolic water outlet 12, collide with the wall 6 to prevent the formation of turbulence and rising water flow. (31) and the rising water flow prevention means adjacent to the wall (6) at the water level corresponding to the upper portion of the interface of the sedimentation sludge flow 32, the rising water flow preventing means in this embodiment is a plurality of rises on the rotating shaft The current prevention plate 14a is attached radially.

By rotating the rotary shaft to prevent the solids from being deposited and accumulated in the rising flow prevention plate (14a), the rotary shaft may be rotated by the drive unit 21 of the sludge collector 22 or may constitute a separate drive unit. .

6 is a conceptual diagram of a fifth embodiment of the sedimentation basin according to the present invention.

In this embodiment, a circular sedimentation basin 1a is illustrated, except that the surface of the sedimentation basin is circular, and the configuration and operation are the same as in the other embodiments illustrated as the rectangular sedimentation basin.

As the particle size of gravity increases in gravity precipitation, the precipitation rate increases and the pin floc generation decreases, so that the solids in the reaction solution form flocs so that the precipitation efficiency can be improved. In this embodiment as well, the agitation device 29 was installed inside the inflow water tank 2 to form a floc formation tank.

In order to prevent the symbolic water stream 31 and the settling sludge stream 32 from reaching the lower part of the symbolic water outlet 12 and colliding with the wall 6, turbulence and rising water flow are formed. The lower wall 6 of (12) was provided with a rising water flow prevention plate 14 to prevent the rise of sludge. Here, the sludge collector 22a is installed in the upward flow preventing plate 14 so that solids may be deposited and floated to worsen the treated water. Thus, the sludge collector 22a is installed to remove the solids deposited on the upper surface of the upward flow preventing plate 14.

The sludge collector 22a provided in the upward flow preventing plate 14 is connected to the sludge collector 22 or a scum skimmer 15 for removing scum from the surface of the sedimentation basin 1a as in this embodiment. It was connected to the rotary drive by the drive unit 21 of the sludge collector 22.

The rising water preventing plate 14 is installed on the wall 6 at an appropriate depth below the symbol water outlet 12 so that the symbol water collection amount can be increased, and the symbol water outlet 12 is attached to the wall 6. ) And installed on both sides of the overflowware, so that the symbolic water overflows from both sides, the overload wear is reduced, and the surface of the sedimentation basin can be fully utilized for solid-liquid separation.

As described above, when the sedimentation basin with improved backflow according to the present invention is applied to the gravity sedimentation basin, the flow of the symbol water and the flow of the sedimentation sludge layer move in the same direction, and the floc forming tank is provided so that the sludge layer and the symbol Less disturbance occurs in the interface of the water layer and the sludge blanket is formed smoothly, and the floc is formed in the floc forming tank and flows into the sedimentation basin, thereby preventing the separation of solids in the sludge blanket layer and improving the precipitation efficiency.

Claims (8)

The sludge withdrawal part of the sedimentation basin is installed at the lower part of the symbolic water outlet located on the opposite side of the sedimentation basin inlet so that the symbolic water flow and the sediment sludge flow in the same direction in the sedimentation basin, the pump chamber is provided adjacent to the sedimentation basin inlet A sludge drawing pump is installed inside the pump chamber, and the sludge drawing pump has an improved sludge blanket forming function, characterized in that the inlet port of the sludge drawing pump is connected to the sludge suction pipe. According to claim 1, wherein the pump chamber is installed adjacent to the symbol water outlet and the sludge outlet of the sedimentation basin, a sludge drawing pump is installed inside the pump chamber, between the inlet and the sludge outlet of the sludge drawing pump Gravity sedimentation basin improved sludge blanket formation, characterized in that connected to the sludge suction pipe. According to claim 1, wherein the sludge draw pump is composed of a submersible pump, the submersible pump is installed in the sludge outlet, the discharge port of the submersible pump connected to the sludge pump, the discharge port and the sludge of the submersible pump Connection of the pressure feed pipe is a gravity sedimentation basin improved sludge blanket formation, characterized in that it is provided with a removable device for easy lifting and installation of the pump. The sludge blanket forming function of claim 1, wherein a part of the flow rate of the sludge pumped from the sludge drawing pump is sprayed to the inlet side of the sludge drawing pump through a nozzle installed in the sludge suction pipe, thereby circulating. Gravity sedimentation basin. According to claim 1, wherein the bottom of the sedimentation basin is installed two or more sludge outlet, the sludge outlet is connected to the suction port and the sludge suction pipe of the sludge discharge pump, two or more sets of sludge extraction by the sludge collector Gravity sedimentation basin with improved sludge blanket formation, characterized in that sediment sludge is collected in the interior of the parts. The method of claim 1, wherein the preliminary stage of the sedimentation basin inlet is provided with a flow rate distribution channel or an inflow water tank and a floc forming tank capable of equally distributing and mixing the reaction solution flowing from the reaction tank, and the agitator is installed in the floc forming tank. Gravity sedimentation basin, characterized in that the sludge blanket formation function is improved. The gravity-type sedimentation basin of claim 1, wherein the lower wall of the symbolic water outlet portion of the sedimentation basin is constructed to be inclined to the outside as the water depth deepens. The sludge blanket forming apparatus of claim 1, wherein a rising water preventing plate is installed on a lower wall of the symbolic water outlet part of the sedimentation basin, and a sludge collector is installed on the rising water preventing plate to remove solids deposited on the surface. Improved gravity sedimentation basin.