River polluted water treatment device

Abstract

The utility model relates to a riverway polluted water body treatment device which comprises a sewage treatment body, the sewage treatment body is sequentially divided into a water inlet area, a biochemical reaction area and a water outlet area from left to right through baffles, a coarse screen is arranged on the outer side of the water inlet area, and the inner side of the water inlet area is communicated with a water inlet of the biochemical reaction area. The biochemical reaction area is divided into an upper area and a lower area, the upper area is provided with a suspended filter material layer, the lower area is provided with a plurality of first filter walls at intervals, and a water inlet of the biochemical reaction area is formed in the bottom of the lower area; flap valves are hinged between the suspended filter material layer and the adjacent first filter wall and between the two adjacent first filter walls; and the water outlet area is provided with a backwashing structure, so that the problem of black and odorous river pollution can be effectively solved.

Description

Technical Field

[0001] This utility model relates to a device for treating polluted water in rivers, belonging to the field of wastewater treatment technology. Background Technology

[0002] The prominent characteristic of polluted river water is eutrophication, with high concentrations of nutrients such as nitrogen and phosphorus, while the concentration of organic matter is usually not high, exhibiting a low carbon-to-nitrogen ratio and a low carbon-to-phosphorus ratio, resulting in insufficient carbon sources for nitrogen removal. Currently available methods for treating polluted river water all have certain shortcomings. For example, while deep aeration can increase dissolved oxygen (DO) in river water, direct aeration causes bubbles to rise and overflow, leading to low aeration efficiency and high energy consumption. Water flushing does not truly remove nitrogen and phosphorus from the water; it only alleviates river pollution to a certain extent and cannot completely eradicate it. While sediment dredging can significantly reduce the presence of pollutants, it generates a large amount of difficult-to-treat riverbed silt, and the implementation is massive, making it difficult to implement widely. Chemical dosing requires the addition of large quantities of chemicals and generates large amounts of difficult-to-treat and potentially toxic chemical sludge, easily causing secondary pollution. Biological-ecological restoration methods are time-consuming, inefficient, and require large land areas, failing to quickly and effectively solve the problem of black and odorous river pollution. Summary of the Invention

[0003] In order to solve the above-mentioned problems in the existing technology, this utility model provides a river pollution water treatment device that can effectively solve the problem of black and odorous river pollution.

[0004] The technical solution of this utility model is as follows:

[0005] A river pollution treatment device includes a sewage treatment body, which is divided into an inlet zone, a biochemical reaction zone, and an outlet zone from left to right by baffles. A coarse screen is installed on the outer side of the inlet zone, and the inlet of the biochemical reaction zone is connected to the inner side of the inlet zone. The biochemical reaction zone is divided into an upper region and a lower region. A suspended filter media layer is installed in the upper region, and several first filter walls are spaced apart in the lower region. The inlet of the biochemical reaction zone is located at the bottom of the lower region. Flap gates are hinged between the suspended filter media layer and adjacent first filter walls, and between two adjacent first filter walls. The outlet zone is equipped with a backwashing structure, which can effectively solve the problem of black and odorous river pollution.

[0006] The wastewater treatment unit is equipped with a backwash water tank on top. The effluent area is divided into a left area and a right area. The backwash structure is located in the left area, and the effluent pump is located in the right area. The effluent pump discharges water in two ways through an effluent pipe. One effluent outlet is connected to the backwash water tank and is controlled by a first solenoid valve to start and stop. The other effluent outlet is equipped with a fountain nozzle at its end and is controlled by a second solenoid valve to start and stop.

[0007] The backwashing structure includes several backwashing inlet pipes located in the left part of the outlet area. One end of each backwashing inlet pipe is connected between the suspended filter media layer and an adjacent first filter wall, and between two adjacent first filter walls. The other end of each backwashing inlet pipe is connected to the backwashing water tank.

[0008] The left region is equipped with a second filter wall; the top of the right region is equipped with a backwash pipe, one end of which is connected to the backwash water tank above the device.

[0009] The suspended filter media layer is fixed by a screen.

[0010] The first filter wall includes a first filter screen, which is wrapped with first coarse sand and fixed to two side baffles. An inclined hole aeration pipe is provided in the middle of the first filter wall. The inclined holes of the aeration pipe are inclined to the left at 45°. An aeration pump is connected to the end of the inclined hole aeration pipe and a third solenoid valve is provided to control its start and stop.

[0011] The flap gate opens to the left and is fixed to the left side panel by a hinge axis.

[0012] The second filter wall includes a second filter screen fixed on the baffle, and the middle of the second filter screen is filled with second coarse sand.

[0013] The wastewater treatment body is equipped with floating blocks around its perimeter.

[0014] The backwash inlet pipe is controlled by a fourth solenoid valve to start and stop, and the backwash pipe is controlled by a fifth solenoid valve to start and stop.

[0015] This utility model has the following beneficial effects:

[0016] This utility model uses a backwashing structure to store part of the effluent in a high-level water tank. When blockage occurs after a period of operation, the first filter wall, the second filter wall and the biological reaction zone are backwashed online at regular intervals to ensure the normal operation of the sewage treatment work.

[0017] This invention employs a first filter wall for mud-water separation, which has a large filtration throughput and high operating efficiency, isolating suspended solids in the influent at the front end of the treatment process to avoid increasing the pollution load in the biochemical reaction zone; at the same time, the second filter wall filters the effluent from the biochemical reaction zone to ensure stable effluent quality. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the present invention during normal operation;

[0019] Figure 2 This is a cross-sectional view of the backwashing process of this utility model.

[0020] Figure 3 This is a top view of the overall structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the first filter wall of this utility model.

[0022] The reference numerals in the figure are as follows:

[0023] 1. Inlet area; 2. Biochemical reaction area; 3. Outlet area; 4. Backwash tank; 5. Coarse screen; 6. Baffle; 7. First filter wall; 8. Aeration pump; 9. Third solenoid valve; 10. Suspended filter media layer; 11. Screen; 12. Flap valve; 13. Backwash inlet pipe; 14. Fourth solenoid valve; 15. Second filter wall; 16. Backwash pipe; 17. Fifth solenoid valve; 18. Outlet pump; 19. Outlet pipe; 20. First solenoid valve; 21. Second solenoid valve; 22. Fountain nozzle; 23. Float; 71. First filter screen; 72. First coarse sand; 73. Inclined hole aeration pipe; 151. Second coarse sand; 152. Second filter screen. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0025] Please see Figures 1 to 4 The utility model provides a technical solution:

[0026] A river pollution water treatment device includes a sewage treatment body, which is divided from left to right into an inlet zone 1, a biochemical reaction zone 2, and an outlet zone 3 by baffles 6. A coarse screen 5 is installed on the outer side of the inlet zone 1, and the inlet of the biochemical reaction zone 2 is connected to the inner side of the inlet zone 1. The biochemical reaction zone 2 is divided into an upper region and a lower region. A suspended filter media layer 10 is installed in the upper region, and several first filter walls 7 are spaced apart in the lower region. Each first filter wall 7 includes a first filter screen 71, which is wrapped with first coarse sand 72 and fixed to the baffles 6 on both sides. An inclined perforated aeration pipe 73 is installed in the middle of the first filter wall 7, with the inclined holes of the aeration pipe 73 tilted 45° to the left. The first filter wall 7 is used for mud-water separation, resulting in a large filtration throughput and high operating efficiency, effectively isolating suspended solids in the inlet water at the treatment front end. To avoid increasing the pollution load of the biochemical reaction zone 2, the end of the inclined hole aeration pipe 73 is connected to an aeration pump 8, and a third solenoid valve 9 is set to control its start and stop; the inlet of the biochemical reaction zone 2 is located at the bottom of the lower area; flap gates 12 are hinged between the suspended filter layer 10 and the adjacent first filter wall 7, and between two adjacent first filter walls 7. The flap gates 12 open to the left and are fixed to the left side baffle 6 by a hinge shaft; the outlet zone 3 is equipped with a backwashing structure; after running for a period of time, the surface of the first filter wall 7 will become clogged, and the backwashing structure can be driven to flush the inside of the device in the opposite direction, and the blockage will be discharged from the coarse screen 5. Specifically, when the backwashing structure is started, the water flow in the opposite direction will impact the flap gate 12, causing the flap gate 12 to open from the closed state to the left, and then the water flow will flow in the opposite direction towards the coarse screen 5;

[0027] The wastewater treatment unit is equipped with a backwash water tank 4 on top. The effluent area 3 is divided into a left area and a right area. The backwash structure is located in the left area, and the right area is equipped with an effluent pump 18. The effluent pump 18 discharges water in two directions through an effluent pipe 19. One effluent outlet is connected to the backwash water tank 4 and is controlled by a first solenoid valve 20. The other effluent outlet is equipped with a fountain nozzle 22 at its end and is controlled by a second solenoid valve 21.

[0028] The backwashing structure includes several backwashing inlet pipes 13 located in the left area of ​​the outlet zone 3. One end of the backwashing inlet pipe 13 is connected between the suspended filter media layer 10 and the adjacent first filter wall 7, and between two adjacent first filter walls 7; the other end of the backwashing inlet pipe 13 is connected to the backwashing water tank 4.

[0029] A second filter wall 15 is provided in the left area. The second filter wall 15 includes a second filter screen 152 fixed on the baffle 6. The second filter screen 152 is filled with second coarse sand 151. The second filter wall 15 filters the water effluent from the biochemical reaction zone 2 to ensure stable water quality. A backwash pipe 16 is provided at the top of the right area. One end of the backwash pipe 16 is connected to the backwash water tank 4 above the device.

[0030] The suspended filter media layer 10 is fixed by a screen 11.

[0031] The wastewater treatment unit is equipped with floats 23 around its perimeter, allowing the device to float on the river via the floats 23.

[0032] The backwash inlet pipe 13 is controlled to start and stop by the fourth solenoid valve 14, and the backwash pipe 16 is controlled to start and stop by the fifth solenoid valve 17.

[0033] The working principle of the above-mentioned river pollution water treatment device is as follows:

[0034] During operation, the wastewater treatment unit floats on the river. Wastewater enters the device through the coarse screen 5 on the left, removing a large amount of large particles and garbage from the polluted water. It then enters the biochemical reaction zone 2 through the inlet at the bottom of the baffle 6, passing through the first filter wall 7 and the suspended filter layer 10 from bottom to top, before entering the effluent zone 3. During this process, the wastewater is filtered by the first filter wall 7, where particulate matter is blocked below it. Simultaneously, the aeration pump 8 operates, aerating the surrounding area through the inclined aeration pipes 73 in the first filter wall 7. This process serves two purposes: firstly, it increases dissolved oxygen in the water; secondly, the large bubbles are effectively broken down into smaller bubbles by being encased in the first coarse sand 72, increasing the contact area between the wastewater and the bubbles and enhancing aeration efficiency; and thirdly, the bubbles from the inclined aeration pipes shear and clean the surface of the coarse sand 72, removing surface pollutants and accumulating them on the left side, thus delaying the clogging of the first filter wall 7. The bubbles, after entering the suspended filter layer 10 with the wastewater, cannot reach the surface and thus continue to replenish dissolved oxygen in the water. After the wastewater enters the suspended filter media layer 10, it comes into full contact with the microorganisms gathered on the suspended filter media. Under the carbonization and nitrification of the microorganisms, the organic matter and ammonia nitrogen in the wastewater are completely consumed. Under the assimilation of the microorganisms attached to the suspended filter media, the total phosphorus (TP) in the wastewater is absorbed by the microorganisms. After the effluent from the biochemical reaction zone 2 is filtered by the second filter wall 15, the first solenoid valve 20 is opened and the second solenoid valve 21 is closed. The effluent is then discharged into the backwash water tank 4 by the effluent pump 18. After the backwash water tank 4 is full, the first solenoid valve 20 is closed and the second solenoid valve 21 is opened. The effluent is then sprayed in all directions through the fountain nozzles 22. This serves two purposes: first, to increase the contact area between the water and the air, thereby increasing dissolved oxygen; and second, to serve as a fountain attraction, thereby improving the harmony and aesthetics of the installation with the environment.

[0035] After running for a period of time, the surface of the first filter wall 7 begins to become clogged. At this time, the aeration pump 8 and the effluent pump 18 are turned off, and the fifth solenoid valve 17 is opened simultaneously. Backwash water enters the effluent area, and under the action of gravity, the water in the device flows backward, discharging the sludge on the surface of the second filter wall 15 and the aging biofilm suspended in the suspended filter media layer 10 through the flap gate 12 set in the left baffle 6, and then out of the device through the coarse screen 5, to be used as fish food or fertilizer for bottom aquatic plants. After rinsing, the fifth solenoid valve 17 is closed, and the fourth solenoid valve 14 is opened in sequence to flush the first filter wall 7. The backwash water is discharged through the flap gate 12 set in the left baffle 6.

[0036] The embodiments described above are merely illustrative of specific implementations of the present invention, and while the descriptions are detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A device for treating polluted river water, comprising a wastewater treatment body, characterized in that: The wastewater treatment unit is divided into an inlet zone (1), a biochemical reaction zone (2), and an outlet zone (3) from left to right by a baffle (6). A coarse screen (5) is provided on the outside of the inlet zone (1). The inlet zone (1) is connected to the inlet of the biochemical reaction zone (2). The biochemical reaction zone (2) is divided into an upper region and a lower region. A suspended filter media layer (10) is provided in the upper region. Several first filter walls (7) are provided at intervals in the lower region. The inlet of the biochemical reaction zone (2) is located at the bottom of the lower region. A flap gate (12) is hinged between the suspended filter media layer (10) and the adjacent first filter wall (7), and between two adjacent first filter walls (7). The outlet zone (3) is provided with a backwashing structure.

2. The river pollution water treatment device as described in claim 1, characterized in that: The wastewater treatment body is equipped with a backwash water tank (4) on top. The effluent area (3) is divided into a left area and a right area. The backwash structure is located in the left area. The right area is equipped with an effluent pump (18). The effluent pump (18) outputs water in two directions through an effluent pipe (19). One effluent outlet is connected to the backwash water tank (4) and is controlled to start and stop by a first solenoid valve (20). The other effluent outlet is equipped with a fountain nozzle (22) at its end and is controlled to start and stop by a second solenoid valve (21).

3. The river pollution water treatment device as described in claim 2, characterized in that: The backwashing structure includes several backwashing inlet pipes (13) located in the left area of ​​the outlet area (3). One end of the backwashing inlet pipe (13) is connected between the suspended filter media layer (10) and the adjacent first filter wall (7), and between two adjacent first filter walls (7). The other end of the backwashing inlet pipe (13) is connected to the backwashing water tank (4).

4. The river pollution water treatment device as described in claim 3, characterized in that: The left region is provided with a second filter wall (15); the top of the right region is provided with a backwash pipe (16), one end of which is connected to the backwash water tank (4) above the device.

5. A river pollution water treatment device as described in claim 1, characterized in that: The suspended filter media layer (10) is fixed by a screen (11).

6. The river polluted water treatment device as described in claim 1, characterized in that: The first filter wall (7) includes a first filter screen (71), which is wrapped with a first coarse sand (72). The first filter screen (71) is fixed on the two side baffles (6). An inclined hole aeration pipe (73) is provided in the middle of the first filter wall (7). The inclined hole of the inclined hole aeration pipe (73) is inclined to the left at 45°. An aeration pump (8) is connected to the end of the inclined hole aeration pipe (73), and a third solenoid valve (9) is provided to control its start and stop.

7. A river pollution water treatment device as described in claim 1, characterized in that: The flap gate (12) opens to the left and is fixed to the left side baffle (6) by a hinge shaft.

8. A river pollution water treatment device as described in claim 4, characterized in that: The second filter wall (15) includes a second filter screen (152) fixed on the baffle (6), the second filter screen (152) being filled with second coarse sand (151).

9. A river pollution water treatment device as described in claim 1, characterized in that: The wastewater treatment body is equipped with floating blocks (23) around its perimeter.

10. A river pollution water treatment device as described in claim 4, characterized in that: The backwash inlet pipe (13) is controlled to start and stop by the fourth solenoid valve (14), and the backwash pipe (16) is controlled to start and stop by the fifth solenoid valve (17).

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