Self-cleaning system for vertical-flow sedimentation tank

Abstract

The utility model discloses a self-cleaning system for a vertical-flow sedimentation tank. The self-cleaning system comprises a spraying device and a gas washing device, wherein the spraying device is arranged between an overflow weir and an inclined plate of the vertical-flow sedimentation tank; the gas washing device is arranged between the inclined plate of the vertical-flow sedimentation tank and a water outlet of a central cylinder; the spraying device comprises a spraying water inlet pipe and a spraying header pipe arranged in the vertical flow type sedimentation tank, the spraying water inlet pipe is communicated with the spraying header pipe, a plurality of spraying branch pipes are arranged on the spraying header pipe, and a plurality of spraying heads are mounted at the bottom of the spraying header pipe and the bottoms of the spraying branch pipes; the gas washing device comprises a gas washing gas inlet pipe and a gas washing header pipe arranged in the vertical flow type sedimentation tank, the gas washing gas inlet pipe is communicated with the gas washing header pipe, a plurality of gas washing branch pipes are arranged on the gas washing header pipe, and a plurality of aeration heads are mounted at the top of the gas washing header pipe and the tops of the plurality of gas washing branch pipes. The self-cleaning system can be used for self-cleaning the vertical-flow sedimentation tank, so that manpower, material resources and financial resources are reduced.

Description

Technical Field

[0001] The utility model relates to a vertical flow type sedimentation tank self-cleaning system, belonging to the technical field of sewage treatment. Background Art

[0002] Small sewage treatment systems such as enterprise sewage stations and integrated sewage treatment equipment use vertical flow sedimentation tanks to reduce floor space. In order to speed up sludge sedimentation, inclined pipes or inclined plates are often installed. In actual operation, there are dead corners in vertical flow sedimentation tanks, and sludge accumulates and floats for a long time, resulting in the sludge gradually settling on the surface of the inclined pipes and inclined plates after the inclined pipe and inclined plate system has been running for a period of time, affecting the effluent water quality; at the same time, the floating sludge continues to accumulate under the inclined plate, resulting in poor sludge reflux, affecting the sludge concentration in the biochemical pool, and further affecting the treatment effect of the sewage treatment equipment. Traditional vertical flow sedimentation tanks do not have a self-cleaning system, and the inclined pipes and inclined plates need to be manually flushed regularly. However, manual flushing of inclined pipes and inclined plates greatly increases the maintenance workload, making it difficult for small sewage treatment systems to be unmanned, and increasing operating costs. Utility Model Content

[0003] The utility model aims to provide a self-cleaning system for a vertical flow sedimentation tank, which can perform self-cleaning on the vertical flow sedimentation tank and reduce manpower, material and financial resources.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A self-cleaning system for a vertical flow sedimentation tank comprises a spray device installed between an overflow weir and an inclined plate of the vertical flow sedimentation tank and an air washing device installed between the inclined plate and a water outlet of a central tube of the vertical flow sedimentation tank;

[0006] The spray device includes a spray water inlet pipe arranged on a side wall of a vertical flow sedimentation tank and a spray main pipe arranged in the vertical flow sedimentation tank, the spray water inlet pipe is connected to the spray main pipe and a plurality of spray branch pipes are arranged on the spray main pipe, and a plurality of spray heads are installed at the bottom of the spray main pipe and the bottom of the plurality of spray branch pipes;

[0007] The air washing device includes an air washing air inlet pipe arranged on a side wall of a vertical flow sedimentation tank and an air washing main pipe arranged in the vertical flow sedimentation tank. The air washing air inlet pipe is connected to the air washing main pipe and a plurality of air washing branch pipes are arranged on the air washing main pipe. A plurality of aeration heads are installed at the top of the air washing main pipe and the tops of the plurality of air washing branch pipes.

[0008] Preferably, the spray main pipe and the air wash main pipe are both of square frame structure.

[0009] Preferably, both the spray water inlet pipe and the air wash air inlet pipe are installed with electric control valves.

[0010] Preferably, the spray branch pipes and the air wash branch pipes are arranged alternately or in parallel.

[0011] Preferably, the spray water inlet pipe and the air wash inlet pipe are located on the same side or different sides of the vertical flow sedimentation tank.

[0012] Preferably, the vertical flow sedimentation tank is also provided with a water inlet pipe for feeding sewage into the central tube, and a water inlet valve is installed on the water inlet pipe.

[0013] Preferably, the vertical flow sedimentation tank is also provided with a drain pipe for discharging sewage, the drain pipe is arranged between the water outlet of the central tube and the air washing device, and a drain valve is installed on the drain pipe.

[0014] The beneficial effects of the utility model are:

[0015] Air flushing through the air washing device can effectively break up the floating sludge in the vertical flow sedimentation tank, avoiding excessive effluent water quality caused by long-term sludge floating; water spray cleaning through the spray device can effectively wash away the sludge, moss and other attachments accumulated on the inclined plate, keep the inclined plate clean, and avoid the deterioration of effluent water quality caused by sludge accumulation on the inclined plate; and the cleaning process can be fully automatically controlled, which is convenient and fast and does not require manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a vertical flow sedimentation tank equipped with a self-cleaning system;

[0017] Figure 2 This is a top view of the spray device;

[0018] Figure 3 This is a bottom view of the air washing device.

[0019] The main reference numerals in the figure have the following meanings:

[0020] 1. Overflow weir, 2. Inclined plate, 3. Spray device, 4. Center tube, 5. Air washing device, 6. Spray water inlet pipe, 7. Spray main pipe, 8. Spray branch pipe, 9. Spray head, 10. Air washing air inlet pipe, 11. Air washing main pipe, 12. Air washing branch pipe, 13. Aeration head, 14. Electric control valve, 15. Water inlet pipe, 16. Water inlet valve, 17. Drain pipe, 18. Drain valve, 19. Water outlet pipe, 20. Sludge hopper. DETAILED DESCRIPTION

[0021] The utility model is specifically introduced below in conjunction with the accompanying drawings and embodiments.

[0022] This embodiment provides a vertical flow sedimentation tank self-cleaning system, such as Figure 1-3As shown, it includes a spray device 3 installed between the overflow weir 1 and the inclined plate 2 of the vertical flow sedimentation tank and an air washing device 5 installed between the inclined plate 2 and the water outlet of the central tube 4 of the vertical flow sedimentation tank.

[0023] The spray device 3 includes a spray water inlet pipe 6 arranged on the side wall of one side of the vertical flow sedimentation tank and a spray main pipe 7 arranged in the vertical flow sedimentation tank. The spray water inlet pipe 6 is connected to the spray main pipe 7 and a plurality of spray branch pipes 8 are arranged on the spray main pipe 7. A plurality of spray heads 9 are installed at the bottom of the spray main pipe 7 and at the bottom of the plurality of spray branch pipes 8.

[0024] The air washing device 5 includes an air washing air inlet pipe 10 arranged on the side wall of one side of the vertical flow sedimentation tank and an air washing main pipe 11 arranged in the vertical flow sedimentation tank. The air washing air inlet pipe 10 is connected to the air washing main pipe 11 and a plurality of air washing branch pipes 12 are arranged on the air washing main pipe 11. A plurality of aeration heads 13 are installed at the top of the air washing main pipe 11 and the top of the plurality of air washing branch pipes 12.

[0025] Among them, the spray water inlet pipe 6 and the air washing inlet pipe 10 are located on the same side of the vertical flow sedimentation tank; the spray main pipe 7 and the air washing main pipe 11 are both frame-type structures, and the spray branch pipe 8 and the air washing branch pipe 12 are staggered at 90 degrees.

[0026] At the same time, in order to facilitate the realization of the automation system, the spray water inlet pipe 6 and the air washing air inlet pipe 10 are both installed with an electric control valve 14, and the spray water inlet pipe 6 and the air washing air inlet pipe 10 are respectively connected to the external water supply and air supply pipelines through the corresponding electric control valves 14; the vertical flow sedimentation tank is installed with an inlet pipe 15 for feeding sewage into the central tube 4 and a drain pipe 17 for discharging sewage, and the drain pipe 17 is arranged between the water outlet of the central tube 4 and the air washing device 5, and a water inlet valve 16 is installed on the water inlet pipe 15, and a drain valve 18 is installed on the drain pipe 17. The electric control valve 14, the water inlet valve 16 and the drain valve 18 are all electrically connected to the central control system (DCS or PLC control system), and the actions are controlled by the central control system.

[0027] The specific cleaning process is as follows:

[0028] First, close the water inlet valve 16 of the vertical flow sedimentation tank inlet pipe 15 to stop the water inlet; at the same time, open the drain valve 18 on the vertical flow sedimentation tank drain pipe 17 to drain for 1-2 minutes to lower the water level in the vertical flow sedimentation tank to below the overflow weir 1 to prevent muddy water from entering the outlet pipe 19 during the air washing process and affecting the outlet water quality.

[0029] Then, the electric control valve 14 on the air washing inlet pipe 10 is opened to perform aeration washing for 2 minutes. The floating lumps of sludge are broken up by gas agitation and air scrubbing, and the sludge and other attachments accumulated on the inclined plate 2 can also be washed away by air.

[0030] After the air washing is completed, the electric control valve 14 on the air washing air inlet pipe 10 is closed and the air is left to stand for 10 minutes to allow the sludge to settle in the sludge hopper 20 at the bottom.

[0031] After the standing is completed, the drain valve 18 on the drain pipe 17 is opened to drain the water, and the discharged sewage is sent to the sewage pool through the pipeline.

[0032] After the drainage is completed, the drainage valve 18 is closed; at the same time, the electric control valve 14 on the spray water inlet pipe 6 is opened to spray and clean for 5 minutes to wash away the residual sludge and other attachments on the inclined plate 2.

[0033] After the spray cleaning is completed, the electric control valve 14 on the spray water inlet pipe 6 is closed, and the water inlet valve 16 is opened for normal water inlet operation.

[0034] The above is only a preferred implementation of the utility model patent. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model patent. These improvements and modifications should also be regarded as the protection scope of the utility model patent.

Claims

1. A vertical flow sedimentation tank self-cleaning system, characterized in that: It includes a spray device installed between the overflow weir and the inclined plate of the vertical flow sedimentation tank and an air washing device installed between the inclined plate and the water outlet of the center tube of the vertical flow sedimentation tank; The spray device includes a spray water inlet pipe arranged on a side wall of a vertical flow sedimentation tank and a spray main pipe arranged in the vertical flow sedimentation tank, the spray water inlet pipe is connected to the spray main pipe and a plurality of spray branch pipes are arranged on the spray main pipe, and a plurality of spray heads are installed at the bottom of the spray main pipe and the bottom of the plurality of spray branch pipes; The air washing device includes an air washing air inlet pipe arranged on a side wall of a vertical flow sedimentation tank and an air washing main pipe arranged in the vertical flow sedimentation tank. The air washing air inlet pipe is connected to the air washing main pipe and a plurality of air washing branch pipes are arranged on the air washing main pipe. A plurality of aeration heads are installed at the top of the air washing main pipe and the tops of the plurality of air washing branch pipes.

2. The vertical flow sedimentation tank self-cleaning system according to claim 1, characterized in that: The spray main pipe and the air washing main pipe are both of square frame structure.

3. The vertical flow sedimentation tank self-cleaning system according to claim 1, characterized in that: The spray water inlet pipe and the air washing air inlet pipe are both equipped with electric control valves.

4. The vertical flow sedimentation tank self-cleaning system according to claim 1, characterized in that: The spray branch pipes and the air washing branch pipes are arranged alternately or in parallel.

5. The vertical flow sedimentation tank self-cleaning system according to claim 1, characterized in that: The spray water inlet pipe and the air washing air inlet pipe are located on the same side or different sides of the vertical flow sedimentation tank.

6. The self-cleaning system for a vertical flow sedimentation tank according to claim 1, characterized in that: The vertical flow sedimentation tank is also provided with a water inlet pipe for feeding sewage into the central cylinder, and a water inlet valve is installed on the water inlet pipe.

7. The self-cleaning system for a vertical flow sedimentation tank according to claim 1, characterized in that: The vertical flow sedimentation tank is also provided with a drain pipe for discharging sewage. The drain pipe is arranged between the water outlet of the central tube and the air washing device, and a drain valve is installed on the drain pipe.

Images