Eutrophication water body ecological restoration device

Abstract

The utility model provides a kind of eutrophication water body ecological restoration device, belong to water body ecological restoration technical field.It includes repair box, repair box is separated by first partition, second partition, third partition and fourth partition and is sequentially arranged anaerobic pool, anoxic pool and aerobic pool, anoxic pool is connected with anaerobic pool and aerobic pool by first water inlet pipe and second water inlet pipe respectively, anaerobic pool is connected with water body floating object filter component, aerobic pool is connected with sedimentation reaction component, water body floating object filter component and sedimentation reaction component are equipped with repair water inlet pipe and repair outlet pipe respectively, water inlet pump and outlet pump are respectively equipped on repair water inlet pipe and repair outlet pipe, aerobic pool bottom is further equipped with sludge backflow component connected with anoxic pool.Can realize efficient, stable denitrification and phosphorus removal effect under the condition of not destroying water body ecological balance and causing secondary pollution, carry out effective water body restoration;Can effectively remove floating object in raw water and isolate particle precipitate.

Description

Technical Field

[0001] This utility model belongs to the field of water body ecological restoration technology, and relates to a device for ecological restoration of eutrophic water bodies. Background Technology

[0002] With the acceleration of industrialization and urbanization, eutrophication of water bodies has become a global environmental problem. Agricultural non-point source pollution, domestic sewage discharge, and substandard industrial wastewater discharge lead to the excessive accumulation of nutrients such as nitrogen and phosphorus in water bodies, causing ecological crises such as excessive algae growth, decreased water transparency, and reduced dissolved oxygen. Current remediation measures include directly adding chemical agents such as copper sulfate and polyaluminum chloride to water bodies. However, although this chemical method can quickly precipitate nitrogen and phosphorus, it is prone to causing secondary pollution, disrupting the ecological balance of aquatic bodies, and the residues of these agents may threaten human health through the food chain. Utility Model Content

[0003] The purpose of this invention is to address the above-mentioned problems by providing an ecological restoration device for eutrophic water bodies.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An ecological restoration device for eutrophic water bodies includes a restoration tank, which is divided into an anaerobic tank, an anoxic tank, and an aerobic tank arranged sequentially by a first partition, a second partition, a third partition, and a fourth partition. The anoxic tank is connected to the anaerobic tank and the aerobic tank through a first inlet pipe and a second inlet pipe, respectively. The anaerobic tank is connected to a floating debris filtration assembly, and the aerobic tank is connected to a sedimentation reaction assembly. The floating debris filtration assembly and the sedimentation reaction assembly are respectively equipped with restoration inlet pipes and restoration outlet pipes, and inlet pumps and outlet pumps are respectively installed on the restoration inlet pipes and restoration outlet pipes. The bottom of the aerobic tank is also equipped with a sludge return assembly connected to the anoxic tank.

[0005] It can restore water bodies in a cyclical manner without disrupting the ecological balance of the water body or causing secondary pollution.

[0006] In the above-mentioned eutrophic water body ecological restoration device, the water body floating matter filtration component includes a filtration pool, which is formed between the restoration tank and the first partition. The filtration pool is vertically equipped with a fine screen, which divides the filtration pool into a sedimentation zone and a filtration zone. The first partition is equipped with a filtration outlet pipe that connects the filtration zone and the anaerobic tank. The restoration inlet pipe is provided on the side wall of the sedimentation zone. The top of the sedimentation zone is equipped with a floating matter discharge structure.

[0007] The fine screen in the filtration tank can isolate particulate impurities and floating matter in the raw water. After being filtered by the fine screen, the raw water enters the anaerobic tank through the filter outlet pipe. The floating matter eventually floats on the top of the sedimentation zone. The floating matter discharge structure at the top of the sedimentation zone can remove the suspended matter to the outside of the repair tank to prevent blockage in subsequent treatment.

[0008] In the above-mentioned ecological restoration device for eutrophic water bodies, a buffer baffle is vertically installed in the sedimentation zone, and a coarse grid is installed at the upper end of the buffer baffle. The buffer baffle and the coarse grid divide the sedimentation zone into a coarse sedimentation zone and a fine sedimentation zone. Sedimentation tanks are respectively installed at the bottom of the coarse sedimentation zone and the fine sedimentation zone. The floating matter discharge structure is installed at the top of the coarse sedimentation zone.

[0009] The buffer baffles in the sedimentation zone help the water flow to transition smoothly, reduce turbulence, and promote sedimentation. The coarse screen at the top of the buffer baffle first intercepts large particulate impurities to protect the fine screen from clogging or damage, thus classifying and isolating particulate impurities. The particulate impurities eventually settle into the sedimentation tank.

[0010] In the aforementioned eutrophic water body ecological restoration device, the upper edge of the restoration inlet pipe is lower than the upper edge of the buffer baffle, and the lower edge of the filter outlet pipe is higher than the upper edge of the buffer baffle.

[0011] It can prevent raw water from directly impacting the coarse screen and give particulate impurities sufficient time to settle under gravity, thus ensuring the filtration quality of raw water.

[0012] In the above-mentioned ecological restoration device for eutrophic water bodies, the floating debris discharge structure includes a discharge pipe installed at the top of the side wall of the coarse sedimentation zone. The discharge pipe is connected to a floating debris collection box installed outside the restoration tank, and a discharge pump is installed on the discharge pipe.

[0013] When the floating debris in the coarse sedimentation zone accumulates to a certain thickness, the discharge pump is activated to suck the floating debris and surface water together through the discharge pipe and transport them to an external floating debris collection box, which can effectively remove the floating debris.

[0014] In the above-mentioned eutrophic water body ecological restoration device, the sludge return component includes a sludge return pipe connected to the aerobic pool and the anoxic pool at the bottom of the third baffle, a sludge pump is provided on the sludge return pipe, and a sludge guiding structure is also provided on the fourth baffle. The silt-guiding structure includes a silt-guiding slope that is set at the bottom of the fourth partition and gradually slopes towards the aerobic tank from top to bottom, forming a silt accumulation zone between the silt-guiding slope and the bottom of the aerobic tank.

[0015] In the aerobic tank, sludge flocculates and settles. The settled sludge slides down the guide slope and collects in the sedimentation area. The guide slope uses gravity to naturally guide the settled sludge to the sedimentation area. The sludge pump extracts sludge rich in microorganisms from the sedimentation area and transports it back to the anoxic tank through the sludge return pipe. The quantitative sludge return can replenish the microbial quantity required by the anoxic tank, maintain its biological activity, and ensure efficient nitrogen and phosphorus removal.

[0016] In the aforementioned ecological restoration device for eutrophic water bodies, a nitrification liquid reflux structure is also provided between the anoxic pool and the aerobic pool.

[0017] The nitrification liquor recirculation structure can recirculate the nitrification liquor in the aerobic tank to the anoxic tank, which can effectively promote denitrification and improve nitrogen and phosphorus removal efficiency.

[0018] In the above-mentioned eutrophic water body ecological restoration device, the nitrification liquid return structure includes a nitrification liquid return pipe installed on the third partition plate connecting the aerobic tank and the anoxic tank. The nitrification liquid return pipe is located above the siltation area, and the lower edge of the nitrification liquid return pipe is higher than the upper edge of the siltation guide slope. A return pump is installed on the nitrification liquid return pipe.

[0019] The return pump extracts nitrified liquid from the area above the sludge guide slope in the aerobic tank, that is, the supernatant layer after sludge settling. This ensures that the extracted liquid is relatively clear supernatant. The nitrified liquid is then transported back to the anoxic tank through the nitrified liquid return pipe, which can effectively promote denitrification and improve nitrogen and phosphorus removal efficiency.

[0020] In the above-mentioned eutrophic water body ecological restoration device, the sedimentation reaction component includes a sedimentation reaction tank set between the restoration tank and the fourth partition. The sedimentation reaction tank is connected to the aerobic tank through a sedimentation inlet pipe. The restoration outlet pipe is provided on the side wall of the sedimentation reaction tank and passes through the restoration tank. A chemical powder inlet is provided at the top of the sedimentation reaction tank. A mixing acceleration component is also provided inside the sedimentation reaction tank.

[0021] The mixed liquor in the aerobic tank enters the sedimentation reaction tank through the sedimentation inlet pipe. Chemical agents and powders are added from the chemical powder inlet at the top of the sedimentation reaction tank. The mixing acceleration component ensures that the mixed liquor and chemical agents and powders come into full contact and mix, causing suspended particles and colloids in the mixed liquor to adhere together and form larger precipitates. These precipitates settle naturally, thereby achieving the purpose of removing pollutants. The powders can further adsorb tiny particles and dissolved organic matter in the water, ensuring the quality of the discharged water.

[0022] In the above-mentioned eutrophic water body ecological restoration device, the mixing acceleration component includes a mixing disc horizontally set at the top of the sedimentation reaction tank. The bottom end of the mixing disc is provided with a vertically set first mixing shaft at the center. The bottom end of the mixing disc is also provided with several second mixing shafts evenly distributed around the first mixing shaft. The top of the sedimentation reaction tank is provided with a rotation driver. The output end of the rotation driver passes through the sedimentation reaction tank and is connected to the top of the mixing disc.

[0023] When the rotary driver is in operation, the output end of the rotary driver rotates to drive the mixing disc to rotate. The first mixing shaft and the second mixing shaft at the bottom of the mixing disc follow the rotation, which can enable the mixture to fully contact and mix with the chemical agents and powders, effectively accelerating the precipitation of precipitates and shortening the precipitation time.

[0024] Compared with existing technologies, the advantages of this invention are: 1. It can effectively remove floating matter and isolate particulate sediment in raw water. 2. It can remove nitrogen and phosphorus from raw water, achieving efficient and stable nitrogen and phosphorus removal. 3. It can effectively restore water bodies without disrupting the ecological balance or causing secondary pollution. Attached Figure Description

[0025] Figure 1 This is a front view provided by this utility model; Figure 2 This is a sectional view provided by this utility model; Figure 3 This is a schematic diagram of the structure of a water floating debris filtration component; Figure 4 This is a structural diagram of an anaerobic tank, an anoxic tank, and an aerobic tank; Figure 5 This is a schematic diagram of the precipitation reaction assembly.

[0026] In the diagram, the following components are included: 1. Repair box; 2. First partition; 3. Second partition; 4. Third partition; 5. Fourth partition; 6. Anaerobic tank; 7. Anoxic tank; 8. Aerobic tank; 9. First inlet pipe; 10. Second inlet pipe; 11. Floating debris filtration assembly; 12. Sedimentation reaction assembly; 13. Repaired inlet pipe; 14. Repaired outlet pipe; 15. Inlet pump; 16. Outlet pump; 17. Sludge return assembly; 18. Sedimentation reaction tank; 19. Filtration tank; 20. Fine screen; 21. Sedimentation zone; 22. Filtration zone; 23. Filter outlet pipe; 24. Floating debris discharge structure. 25. Buffer baffle 26. Coarse screen 27. Coarse sedimentation zone 28. Fine sedimentation zone 29. Sedimentation tank 30. Discharge pipe 30. Floating matter collection box 31. Discharge pump 32. Sludge return pipe 33. Sludge pump 34. Sludge guiding structure 35. Sludge guiding slope 36. Sludge accumulation zone 37. Nitrification liquid return structure 38. Nitrification liquid return pipe 39. Return pump 40. Sedimentation inlet pipe 41. Chemical powder inlet 42. Mixing acceleration component 43. Mixing disc 44. First mixing shaft 45. Second mixing shaft 46. Rotary drive 47. Detailed Implementation

[0027] like Figures 1-5 As shown, an ecological restoration device for eutrophic water bodies includes a restoration tank 1. The restoration tank 1 is divided into an anaerobic tank 6, an anoxic tank 7, and an aerobic tank 8 arranged sequentially by a first partition 2, a second partition 3, a third partition 4, and a fourth partition 5. The anoxic tank 7 is connected to the anaerobic tank 6 and the aerobic tank 8 through a first inlet pipe 9 and a second inlet pipe 10, respectively. The anaerobic tank 6 is connected to a water body floating matter filtration assembly 11, and the aerobic tank 8 is connected to a sedimentation reaction assembly 12. The water body floating matter filtration assembly 11 and the sedimentation reaction assembly 12 are respectively equipped with a restoration inlet pipe 13 and a restoration outlet pipe 14. The restoration inlet pipe 13 and the restoration outlet pipe 14 are respectively equipped with an inlet pump 15 and an outlet pump 16. The bottom of the aerobic tank 8 is also equipped with a sludge return assembly 17 connected to the anoxic tank 7.

[0028] The first water inlet pipe 9 and the second water inlet pipe 10 are respectively installed on the second partition 3 and the third partition 4.

[0029] In this invention, the inlet pump 15 transports the raw water to be treated from the eutrophic water body to the floating matter filter assembly 11 through the repaired inlet pipe 13. The floating matter filter assembly 11 pre-treats the raw water, removing floating matter and isolating particulate sediment. The pre-treated raw water then enters the anaerobic tank 6, where it reacts with a large number of polyphosphate-accumulating bacteria in the activated sludge under anaerobic conditions to release phosphorus. The sludge-water mixture in the anaerobic tank 6 flows into the anoxic tank 7 through the first inlet pipe 9. The mixture flowing out of the anoxic tank 7 enters the aerobic tank 8 through the second inlet pipe 10. The aerobic microorganisms in the aerobic tank 8 react with the mixture, nitrifying the ammonia nitrogen in the mixture into nitrates and oxidizing the residual organic matter. The sludge is then returned to the anaerobic tank. The flow assembly 17 can recirculate the sludge from the bottom of the aerobic tank 8 to the anoxic tank 7. Therefore, the anoxic tank 7 receives the sludge-water mixture from the anaerobic tank 6, as well as the sludge recirculation. The denitrifying bacteria in the anoxic tank 7 utilize the nitrates in the sludge-water mixture and sludge for phosphorus absorption and denitrification, simultaneously converting nitrates into nitrogen gas. This removes nitrogen and phosphorus from the raw water, achieving efficient and stable nitrogen and phosphorus removal. Finally, the mixed liquor from the aerobic tank 8 enters the sedimentation reaction tank 18 for sedimentation treatment and is ultimately returned to the eutrophic water body through the effluent pipe 14 for water body restoration through circulation. This allows for effective water body restoration without disrupting the ecological balance or causing secondary pollution. The anaerobic tank 6, anoxic tank 7, and aerobic tank 8 are existing technologies and will not be discussed in further detail.

[0030] Specifically, combining Figure 2 and Figure 3 As shown, the water body floating matter filtration assembly 11 includes a filtration pool 19, which is formed between the repair box 1 and the first partition 2. The filtration pool 19 is vertically provided with a fine grid 20, which divides the filtration pool 19 into a sedimentation zone 21 and a filtration zone 22. The first partition 2 is provided with a filter outlet pipe 23 that connects the filtration zone 22 and the anaerobic tank 6. The repair inlet pipe 13 is provided on the side wall of the sedimentation zone 21. The top of the sedimentation zone 21 is provided with a floating matter discharge structure 24.

[0031] The raw water to be treated enters the filter tank 19 through the repair inlet pipe 13. The fine screen 20 in the filter tank 19 can isolate particulate impurities and floating matter in the raw water. The raw water filtered by the fine screen 20 enters the anaerobic tank 6 through the filter outlet pipe 23. The floating matter is finally suspended at the top of the sedimentation zone 21. The floating matter discharge structure 24 at the top of the sedimentation zone 21 can discharge the suspended matter to the outside of the repair tank 1 to prevent blockage in subsequent treatment.

[0032] Preferably, combined with Figure 2 and Figure 3As shown, a buffer baffle 25 is vertically installed in the sedimentation zone 21, and a coarse screen 26 is installed at the upper end of the buffer baffle 25. The buffer baffle 25 and the coarse screen 26 divide the sedimentation zone 21 into a coarse sedimentation zone 27 and a fine sedimentation zone 28. Sedimentation tanks 29 are respectively installed at the bottom of the coarse sedimentation zone 27 and the fine sedimentation zone 28. The floating matter discharge structure 24 is installed at the top of the coarse sedimentation zone 27. The upper edge of the repair inlet pipe 13 is lower than the upper edge of the buffer baffle 25, and the lower edge of the filter outlet pipe 23 is higher than the upper edge of the buffer baffle 25. This can prevent the raw water from directly impacting the coarse screen 26 and give particulate impurities sufficient time to settle under gravity, thus ensuring the filtration quality of the raw water.

[0033] The buffer baffle 25 in the sedimentation zone 21 helps the water flow to transition smoothly, reduces turbulence, and promotes sedimentation. The coarse screen 26 at the top of the buffer baffle 25 first intercepts large particulate impurities to protect the fine screen 20 from clogging or damage, thus classifying and isolating particulate impurities. The particulate impurities eventually settle into the sedimentation tank 29.

[0034] Specifically, combining Figure 2 and Figure 3 As shown, the floating matter discharge structure 24 includes a discharge pipe 30 disposed on the top of the side wall of the coarse sedimentation zone 27. The discharge pipe 30 is connected to the floating matter collection box 31 disposed outside the repair box 1. A discharge pump 32 is provided on the discharge pipe 30.

[0035] When the floating debris in the coarse sedimentation zone 27 accumulates to a certain thickness, the discharge pump 32 is activated to suck up the floating debris and surface water together through the discharge pipe 30 and transport them to the external floating debris collection box 31, which can effectively remove the floating debris.

[0036] Specifically, combining Figure 2 and Figure 4 As shown, the sludge return assembly 17 includes a sludge return pipe 33 connected to the aerobic tank 8 and the anoxic tank 7 at the bottom of the third partition 4. A sludge pump 34 is provided on the sludge return pipe 33. A sludge guiding structure 35 is also provided on the fourth partition 5. The sludge guiding structure 35 includes a sludge guiding slope 36 that is gradually inclined from top to bottom into the aerobic tank 8 at the bottom of the fourth partition 5. A sludge accumulation area 37 is formed between the sludge guiding slope 36 and the bottom of the aerobic tank 8.

[0037] In the aerobic tank 8, sludge flocculates and settles. The settled sludge slides down the guide slope 36 and collects in the sedimentation area 37. The guide slope 36 uses gravity to naturally guide the sludge to settle in the sedimentation area 37. The sludge pump 34 extracts sludge rich in microorganisms from the sedimentation area 37 and transports it back to the anoxic tank 7 through the sludge return pipe 33. The quantitative sludge return can replenish the microbial quantity required by the anoxic tank 7, maintain its biological activity, and ensure efficient nitrogen and phosphorus removal.

[0038] Specifically, combining Figure 2 and Figure 4 As shown, a nitrification liquid return structure 38 is also provided between the anoxic tank 7 and the aerobic tank 8; the nitrification liquid return structure 38 includes a nitrification liquid return pipe 39 connected to the aerobic tank 8 and the anoxic tank 7, which is installed on the third partition 4. The nitrification liquid return pipe 39 is located above the sedimentation zone 37. The lower edge of the nitrification liquid return pipe 39 is higher than the upper edge of the silt guiding slope 36. A return pump 40 is provided on the nitrification liquid return pipe 39.

[0039] The return pump 40 extracts nitrified liquid from the area above the guide slope 36 in the aerobic tank 8, that is, the supernatant layer after sludge settling, ensuring that the extracted supernatant is relatively clear. The nitrified liquid is transported back to the anoxic tank 7 through the nitrified liquid return pipe 39, which can effectively promote denitrification and improve the nitrogen and phosphorus removal effect.

[0040] Specifically, combining Figure 2 and Figure 5 As shown, the sedimentation reaction assembly 12 includes a sedimentation reaction tank 18 disposed between the repair tank 1 and the fourth partition 5. The sedimentation reaction tank 18 is connected to the aerobic tank 8 through a sedimentation inlet pipe 41. The repair outlet pipe 14 is provided on the side wall of the sedimentation reaction tank 18 and passes through the repair tank 1. A chemical powder inlet 42 is provided at the top of the sedimentation reaction tank 18. A mixing acceleration assembly 43 is also provided inside the sedimentation reaction tank 18.

[0041] The mixed liquor in the aerobic tank 8 enters the sedimentation reaction tank 18 through the sedimentation inlet pipe 41. Chemical agents and powders are added from the chemical powder inlet 42 at the top of the sedimentation reaction tank 18. The mixing acceleration component 43 makes the mixed liquor fully contact and mix with the chemical agents and powders, so that the suspended particles and colloidal matter in the mixed liquor adhere together and form larger precipitates. These precipitates settle naturally, thereby achieving the purpose of removing pollutants. The powder can further adsorb small particles and dissolved organic matter in the water to ensure the quality of the discharged water.

[0042] Specifically, combining Figure 2 and Figure 5 As shown, the mixing acceleration component 43 includes a mixing disc 44 horizontally disposed at the top of the sedimentation reaction tank 18. A first mixing shaft 45 is vertically disposed at the center of the bottom end of the mixing disc 44. Several second mixing shafts 46 are also disposed at the bottom end of the mixing disc 44 and are evenly distributed around the first mixing shaft 45. A rotation driver 47 is disposed at the top end of the sedimentation reaction tank 18. The output end of the rotation driver 47 passes through the sedimentation reaction tank 18 and is connected to the top end of the mixing disc 44.

[0043] When the rotary driver 47 operates, the output end of the rotary driver 47 rotates to drive the mixing disc 44 to rotate. The first mixing shaft 45 and the second mixing shaft 46 at the bottom of the mixing disc 44 follow the rotation, which can enable the mixture to fully contact and mix with the chemical agents and powders, effectively accelerating the precipitation of precipitates and shortening the precipitation time.

[0044] The working principle of this utility model is as follows: the inlet pump 15 transports the raw water to be treated in the eutrophic water body to the filter tank 19 through the repaired inlet pipe 13. The coarse screen 26 and the fine screen 20 intercept particulate impurities in turn and perform graded isolation of particulate impurities. The raw water after filtration enters the anaerobic tank 6 through the filter outlet pipe 23. Under anaerobic conditions, the raw water reacts with a large number of polyphosphate-accumulating bacteria in the activated sludge to release phosphorus. The mud-water mixture in the anaerobic tank 6 flows into the anoxic tank 7 through the first inlet pipe 9. The mixed liquid flowing out of the anoxic tank 7 enters the aerobic tank 8 through the second inlet pipe 10. The aerobic microorganisms in the aerobic tank 8 react with the mixed liquid to nitrify the ammonia nitrogen in the mixed liquid into nitrate and oxidize the residual organic matter in the mixed liquid. The sludge pump 34 extracts sludge rich in microorganisms from the sludge accumulation zone 37 and transports it back to the anoxic tank 7 through the sludge return pipe 33. The denitrifying bacteria in the anoxic tank 7 use the sludge-water mixture and the nitrates contained in the sludge to oxidize and absorb phosphorus, while simultaneously denitrifying the nitrates into nitrogen gas. This removes nitrogen and phosphorus from the raw water, achieving efficient and stable nitrogen and phosphorus removal. The nitrified liquid is transported back to the anoxic tank 7 through the nitrified liquid return pipe 39 to promote denitrification. When the floating matter on the surface of the coarse sedimentation zone 27 accumulates to a certain thickness, the discharge pump 32 is activated to pump the floating matter and surface water together through the discharge pipe 30 and transport them to the external floating matter collection box 31. Finally, the mixed liquor in the aerobic tank 8 enters the sedimentation reaction tank 18 for sedimentation treatment, and is eventually returned to the eutrophic water body through the repair effluent pipe 14 to circulate and repair the water body.

[0045] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0046] Although this paper extensively uses the following components: repair tank 1, first partition 2, second partition 3, third partition 4, fourth partition 5, anaerobic tank 6, anoxic tank 7, aerobic tank 8, first inlet pipe 9, second inlet pipe 10, water body floating matter filter assembly 11, sedimentation reaction assembly 12, repair inlet pipe 13, repair outlet pipe 14, inlet pump 15, outlet pump 16, sludge return assembly 17, sedimentation reaction tank 18, filter tank 19, fine screen 20, sedimentation zone 21, filter zone 22, filter outlet pipe 23, floating matter discharge structure 24, buffer baffle 25, coarse screen 26, coarse sedimentation zone 27, fine sedimentation zone 28 The following components are included: sedimentation tank 29, discharge pipe 30, floating matter collection box 31, discharge pump 32, sludge return pipe 33, sludge pump 34, sludge guiding structure 35, sludge guiding slope 36, sludge accumulation zone 37, nitrification liquid return structure 38, nitrification liquid return pipe 39, return pump 40, sedimentation inlet pipe 41, chemical powder inlet 42, mixing acceleration component 43, mixing disc 44, first mixing shaft 45, second mixing shaft 46, rotary drive 47, etc. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. An ecological restoration device for eutrophic water bodies, comprising a restoration tank (1), characterized in that, The repair tank (1) is divided into an anaerobic tank (6), an anoxic tank (7) and an aerobic tank (8) arranged in sequence by a first partition (2), a second partition (3), a third partition (4) and a fourth partition (5). The anoxic tank (7) is connected to the anaerobic tank (6) and the aerobic tank (8) through a first inlet pipe (9) and a second inlet pipe (10), respectively. The anaerobic tank (6) is connected to the water body floating matter filtration assembly (11). The aerobic tank (8) is connected to the sedimentation reaction assembly (12). The water body floating matter filtration assembly (11) and the sedimentation reaction assembly (12) are respectively provided with a repair inlet pipe (13) and a repair outlet pipe (14). The repair inlet pipe (13) and the repair outlet pipe (14) are respectively provided with an inlet pump (15) and an outlet pump (16). The bottom of the aerobic tank (8) is also provided with a sludge return assembly (17) connected to the anoxic tank (7).

2. The eutrophic water body ecological restoration device according to claim 1, characterized in that, The water body floating matter filtration assembly (11) includes a filtration pool (19), which is formed between the repair box (1) and the first partition (2). The filtration pool (19) is vertically provided with a fine screen (20), which divides the filtration pool (19) into a sedimentation zone (21) and a filtration zone (22). The first partition (2) is provided with a filter outlet pipe (23) that connects the filtration zone (22) and the anaerobic tank (6). The repair inlet pipe (13) is provided on the side wall of the sedimentation zone (21). The top of the sedimentation zone (21) is provided with a floating matter discharge structure (24).

3. The eutrophic water body ecological restoration device according to claim 2, characterized in that, The sedimentation zone (21) is vertically equipped with a buffer baffle (25), and a coarse grid (26) is provided at the upper end of the buffer baffle (25). The buffer baffle (25) and the coarse grid (26) divide the sedimentation zone (21) into a coarse sedimentation zone (27) and a fine sedimentation zone (28). Sedimentation tanks (29) are respectively provided at the bottom of the coarse sedimentation zone (27) and the fine sedimentation zone (28). The floating matter discharge structure (24) is located at the top of the coarse sedimentation zone (27).

4. The eutrophic water body ecological restoration device according to claim 2, characterized in that, The upper edge of the repair inlet pipe (13) is lower than the upper edge of the buffer baffle (25), and the lower edge of the filter outlet pipe (23) is higher than the upper edge of the buffer baffle (25).

5. The eutrophic water body ecological restoration device according to claim 3, characterized in that, The floating debris discharge structure (24) includes a discharge pipe (30) located on the top of the side wall of the coarse sedimentation zone (27). The discharge pipe (30) is connected to a floating debris collection box (31) located outside the repair box (1). A discharge pump (32) is provided on the discharge pipe (30).

6. The eutrophic water body ecological restoration device according to claim 1, characterized in that, The sludge return assembly (17) includes a sludge return pipe (33) connected to the aerobic tank (8) and the anoxic tank (7) at the bottom of the third partition (4), a sludge pump (34) is provided on the sludge return pipe (33), and a sludge guiding structure (35) is also provided on the fourth partition (5). The silt-guiding structure (35) includes a silt-guiding slope (36) that is set at the bottom of the fourth partition (5) and gradually slopes towards the aerobic tank (8) from top to bottom. The silt-guiding slope (36) and the bottom of the aerobic tank (8) form a silt accumulation area (37).

7. The eutrophic water body ecological restoration device according to claim 6, characterized in that, A nitrification liquid reflux structure (38) is also provided between the anoxic tank (7) and the aerobic tank (8).

8. The eutrophic water body ecological restoration device according to claim 7, characterized in that, The nitrification liquid return structure (38) includes a nitrification liquid return pipe (39) connected to the aerobic tank (8) and the anoxic tank (7) on the third partition (4). The nitrification liquid return pipe (39) is located above the sedimentation area (37). The lower edge of the nitrification liquid return pipe (39) is higher than the upper edge of the silt guiding slope (36). A return pump (40) is provided on the nitrification liquid return pipe (39).

9. The eutrophic water body ecological restoration device according to any one of claims 1-8, characterized in that, The sedimentation reaction assembly (12) includes a sedimentation reaction tank (18) located between the repair tank (1) and the fourth partition (5). The sedimentation reaction tank (18) is connected to the aerobic tank (8) through a sedimentation inlet pipe (41). The repair outlet pipe (14) is provided on the side wall of the sedimentation reaction tank (18) and passes through the repair tank (1). The top of the sedimentation reaction tank (18) is provided with a chemical powder inlet (42). A mixing acceleration assembly (43) is also provided in the sedimentation reaction tank (18).

10. The eutrophic water body ecological restoration device according to claim 9, characterized in that, The mixing acceleration component (43) includes a mixing disc (44) horizontally arranged at the top of the sedimentation reaction tank (18). The bottom of the mixing disc (44) is provided with a vertically arranged first mixing shaft (45) at the center. The bottom of the mixing disc (44) is also provided with a plurality of second mixing shafts (46) evenly distributed around the first mixing shaft (45). The top of the sedimentation reaction tank (18) is provided with a rotation driver (47). The output end of the rotation driver (47) passes through the sedimentation reaction tank (18) and is connected to the top of the mixing disc (44).

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