Closed water body ecological restoration system

Abstract

The utility model provides a closed water body ecological restoration system, and belongs to the technical field of water body restoration. The device comprises a wetland pool arranged in a water body, a wetland water body layer, a wetland plant layer, a sand grain layer, a gravel layer and a pebble layer are sequentially distributed in the wetland pool from top to bottom, a water inlet pipe and a water outlet pipe are arranged on the two sides of the wetland pool and located in the wetland water body layer and the pebble layer respectively, and a water inlet pump and a water outlet pump are arranged on the water inlet pipe and the water outlet pipe respectively. The water inlet pipe is sequentially connected with a hydrolysis tank and a sedimentation tank, one side of the sedimentation tank is connected with a water body through a sedimentation water inlet pipe and a sedimentation water inlet pump, a powder inlet is formed in the top of the sedimentation tank, and a sedimentation accelerating device capable of accelerating sedimentation of sediments is arranged in the sedimentation tank. The system can degrade and absorb harmful substances in the water body, and eliminate or relieve water body pollution and enhance water quality by restoring and enhancing the self-purification capacity of the water body; the oxygen-deficient state of the water body is improved, the activity of the water body is increased, and the balance of a wetland ecosystem is favorably maintained.

Description

Technical Field

[0001] The utility model belongs to the technical field of water body restoration and relates to a closed water body ecological restoration system. Background Art

[0002] For closed water bodies such as urban landscape lakes, artificial ponds, closed reservoirs, etc., due to the lack of natural water circulation, pollutants are prone to accumulate, resulting in frequent problems such as eutrophication, insufficient dissolved oxygen, and algal blooms. Traditional treatment technologies have defects such as high cost, risk of secondary pollution, or poor ecological compatibility. Content of the Utility Model

[0003] The purpose of the utility model is to provide a closed water body ecological restoration system for the above problems.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A closed water body ecological restoration system includes a wetland pond arranged in the water body. In the wetland pond, a wetland water body layer, a wetland plant layer, a sand layer, a gravel layer, and a pebble layer are sequentially distributed from top to bottom. On both sides of the wetland pond, a water inlet pipe and a water outlet pipe are respectively arranged in the wetland water body layer and the pebble layer. A water inlet pump and a water outlet pump are respectively arranged on the water inlet pipe and the water outlet pipe. The water inlet pipe is sequentially connected with a hydrolysis tank and a sedimentation tank. One side of the sedimentation tank is connected with the water body through a sediment inlet pipe and a sediment inlet pump. A powder inlet is arranged at the top of the sedimentation tank. A sediment acceleration device capable of accelerating the sedimentation of sediment is arranged in the sedimentation tank.

[0006] The sediment acceleration device in the sedimentation tank can accelerate the sedimentation of sediment, improve the sewage treatment efficiency, and enable the sewage to fully contact and mix with chemical agents and powders, improving the efficiency of coagulation and adsorption. The hydrolysis tank can degrade organic substances in the sewage, reduce ammonia nitrogen emissions, remove COD in the sewage, improve the biodegradability of the sewage. The wetland plant layer can absorb harmful substances in the sewage, control water pollution, and release oxygen into the water body at the same time, which can increase the activity of the water body and help maintain the balance of the wetland ecosystem. The sand layer and the gravel layer provide an attachment matrix for microorganisms in the wetland. These microorganisms can effectively absorb, degrade, and transform pollutants in the sewage. The pebble layer can fix the wetland bottom, enhance the stability and durability of the wetland, and play a filtering role.

[0007] In the above-mentioned closed water body ecological restoration system, a guiding partition is provided in the sedimentation tank. A sedimentation area is formed between the guiding partition and the inner side wall of the sedimentation tank near the sedimentation inlet pipe, and a water outlet area is formed between the guiding partition and the other inner side wall of the sedimentation tank. A sedimentation outlet pipe communicating with the hydrolysis tank is provided on the side wall of the water outlet area. A sedimentation outlet water pump is provided on the sedimentation outlet pipe. A filtering component is provided at the lower end of the sedimentation outlet pipe in the water outlet area, and a baffle is further provided at the lower end of the water outlet area.

[0008] The contact and mixing of sewage with chemical agents and powders are carried out in the sedimentation area. The guiding partition plays a blocking role. The sediment generated in the sedimentation area naturally settles to the bottom of the sedimentation area. The sedimentation outlet pipe and the sedimentation outlet water pump can guide the sewage from the water outlet area into the hydrolysis tank. The filtering component at the lower end of the water outlet area can isolate particulate matters, and the baffle at the lower end of the water outlet area is used to isolate sediments.

[0009] In the above-mentioned closed water body ecological restoration system, a biological floating island is provided at the upper end of the wetland pond. The biological floating island includes a floating layer, a filter material layer, and an aquatic plant layer which are distributed in sequence from bottom to top. The floating layer floats on the wetland water layer by its own buoyancy.

[0010] The biological floating island floats on the wetland water layer through the floating layer. The aquatic plant layer on the biological floating island can absorb harmful substances in the sewage of the wetland water layer and produce oxygen through photosynthesis, thus helping to improve the water quality. The microorganisms in the filter material layer can decompose the pollutants in the sewage to purify the water quality.

[0011] In the above-mentioned closed water body ecological restoration system, the wetland plant layer and the aquatic plant layer respectively include submerged plants and aquatic plants. The roots of the submerged plants and the aquatic plants are respectively rooted in the soil of the wetland plant layer and the aquatic plant layer. An oxygenation device is also provided in the wetland water layer.

[0012] The roots of the submerged plants and the aquatic plants are well-developed and have a strong tolerance to sewage. They can absorb harmful substances in the sewage and control water pollution. The oxygenation device in the wetland water layer can increase the oxygen content in the sewage, increase the activity of the water body, and help to maintain the balance of the wetland ecosystem.

[0013] In the above-mentioned closed water body ecological restoration system, the oxygenation device includes an aeration pipe laid in the wetland water layer. A number of aeration holes are evenly distributed on the pipe walls on both sides of the aeration pipe. The air inlet end of the aeration pipe is connected to an external aeration blower. An aeration round head is inserted on the aeration holes, and a number of micropores are evenly distributed at the top of the aeration round head.

[0014] The aeration blower operates to deliver air into the aeration pipe. The air enters the interior of the aeration round head through the aeration holes and diffuses out from the micro-holes of the aeration round head in the form of micro-bubbles into the sewage. The micro-bubbles have a larger contact area with water and a longer residence time in the sewage, improving the oxygen mass transfer efficiency.

[0015] In the above-mentioned closed water body ecological restoration system, the guiding partition is vertically arranged. The sedimentation acceleration device includes a rotating shaft vertically penetrating the top end of the sedimentation tank and extending into the sedimentation tank. Stirring blades are provided on the rotating shaft. A rotary drive is provided at the top end of the sedimentation tank, and the output end of the rotary drive is connected to the upper end of the rotating shaft.

[0016] When the rotary drive operates, the output end of the rotary drive rotationally drives the rotating shaft to rotate. The stirring blades on the rotating shaft rotate accordingly, enabling the sewage to fully contact and mix with the chemical agent and powder, and generating a swirling flow in the sedimentation tank. The generated swirling flow can accelerate the sedimentation of the sediment, thereby improving the sedimentation efficiency.

[0017] In the above-mentioned closed water body ecological restoration system, a sedimentation pool is provided at the bottom end of the sedimentation tank. The inner side wall of the sedimentation pool on the side away from the guiding partition is inclined towards the inner end of the sedimentation pool. A discharge channel is provided at the bottom of the sedimentation pool, and an anti-blocking component is also provided in the sedimentation pool.

[0018] The inclined inner side wall of the sedimentation pool plays a role in guiding the sedimentation of the sediment, which can improve the sedimentation efficiency. The anti-blocking component in the sedimentation pool can stir in the sedimentation pool to prevent the sediment from sticking and caking in the sedimentation pool, thereby causing the blockage of the discharge channel.

[0019] In the above-mentioned closed water body ecological restoration system, the bottom end of the rotating shaft extends into the sedimentation pool. The anti-blocking component includes a number of stirring rods horizontally inserted on the lower end of the rotating shaft and vertically distributed. Socket holes are provided on the outer wall of the bottom end of the rotating shaft, and the stirring rods are threadedly connected to the socket holes.

[0020] The length of the vertically distributed stirring rods is adapted to the inclined inner wall of the sedimentation pool. The stirring rods can rotate along with the rotating shaft to stir in the sedimentation pool, preventing the sediment from sticking and caking in the sedimentation pool, thereby causing the blockage of the discharge channel.

[0021] In the above-mentioned closed water body ecological restoration system, the filtering component includes a coarse filter screen provided at the bottom end of the water outlet area, and a number of fine filter screens are sequentially distributed above the coarse filter screen in the water outlet area.

[0022] The coarse filter screen can conduct preliminary coarse filtration on the particulate impurities and sediment still floating in the sewage. The fine filter screens conduct fine filtration on the sewage entering the water outlet area, and can effectively isolate the particulate impurities from entering the hydrolysis tank.

[0023] In the above-mentioned closed water body ecological restoration system, various microorganisms are cultured in the hydrolysis tank, the sediment outlet pipe is located on one side of the upper end of the hydrolysis tank, and the inlet pipe is located at the lower end of the other side of the hydrolysis tank.

[0024] The sewage enters the hydrolysis tank and flows from top to bottom. Various microorganisms in the hydrolysis tank can fully contact and react with the sewage to degrade the organic matter in the sewage, reduce ammonia nitrogen emissions, remove COD in the sewage, and improve the biodegradability of the sewage.

[0025] Compared with the existing technology, the advantages of the present utility model are as follows: 1. The system can degrade and absorb harmful substances in the water body, eliminate or reduce water pollution and enhance water quality by restoring and enhancing the self-purification ability of the water body. 2. Improve the anoxic state of the water body, increase the activity of the water body, and contribute to maintaining the balance of the wetland ecosystem. 3. The sedimentation tank can efficiently sediment impurities such as suspended particulate matter in the water body. Description of the Drawings

[0026] Figure 1 is the overall structural schematic diagram provided by the present utility model;

[0027] Figure 2 is the structural schematic diagram of the wetland tank;

[0028] Figure 3 is the structural schematic diagram of the sedimentation tank;

[0029] Figure 4 is the structural schematic diagram of the aeration pipe.

[0030] In the figure, water body 1, wetland tank 2, wetland water layer 3, wetland plant layer 4, sand layer 5, gravel layer 6, pebble layer 7, inlet pipe 8, outlet pipe 9, inlet water pump 10, outlet water pump 11, hydrolysis tank 12, sedimentation tank 13, powder inlet 14, sedimentation acceleration device 15, guiding partition 16, sedimentation area 17, water outlet area 18, filtering component 19, baffle 20, biological floating island 21, floating layer 22, filter material layer 23, aquatic plant layer 24, submerged plant 25, aquatic plant 26, oxygenation device 27, aeration pipe 28, aeration hole 29, aeration round head 30, rotating shaft 31, stirring blade 32, rotating driver 33, sedimentation pond 34, discharge channel 35, anti-blocking component 36, stirring rod 37, jack 38, coarse filter screen 39, fine filter screen 40, hub 41, blade 42, positioning sleeve 43, sediment outlet pipe 44, sediment outlet water pump 45, sediment inlet pipe 46, sediment inlet water pump 47. Detailed Embodiments

[0031] As Figures 1 - 4As shown in the figure, a closed water body ecological restoration system includes a wetland pond 2 arranged in a water body 1. In the wetland pond 2, a wetland water layer 3, a wetland plant layer 4, a sand layer 5, a gravel layer 6, and a pebble layer 7 are sequentially distributed from top to bottom. An inlet pipe 8 and an outlet pipe 9 are respectively arranged in the wetland water layer 3 and the pebble layer 7 on both sides of the wetland pond 2. An inlet water pump 10 and an outlet water pump 11 are respectively arranged on the inlet pipe 8 and the outlet pipe 9. The inlet pipe 8 is sequentially connected to a hydrolysis tank 12 and a sedimentation tank 13. One side of the sedimentation tank 13 is connected to the water body 1 through a sedimentation inlet pipe 46 and a sedimentation inlet water pump 47. A powder inlet 14 is arranged at the top of the sedimentation tank 13, and a sedimentation acceleration device 15 capable of accelerating the sedimentation of sediments is arranged in the sedimentation tank 13.

[0032] In the present utility model, the sedimentation tank 13 can introduce the sewage in the water body 1 into the sedimentation tank 13 through the sedimentation inlet pipe 46 and the sedimentation inlet water pump 47. Chemical agents and powders are added from the powder inlet 14 at the top of the sedimentation tank 13. The sewage contacts and mixes with the chemical agents and powders in the sedimentation tank 13. The sewage treated in the sedimentation tank 13 flows into the hydrolysis tank 12 for hydrolysis. The sewage after hydrolysis flows through the inlet pipe 8 and the inlet water pump 10 to the wetland water layer 3 of the wetland pond 2, and sequentially flows through the wetland plant layer 4, the sand layer 5, the gravel layer 6, and the pebble layer 7 from top to bottom, completing the final purification and being re-discharged into the water body 1 through the outlet pipe 9 and the outlet water pump 11 to improve the water quality of the water body.

[0033] The chemical agents cause the suspended particles and colloids in the sewage to adhere together to form larger sediments, and these sediments settle naturally, thereby achieving the purpose of sewage removal. The powders can further adsorb the fine particles and dissolved organic matters in the water. The sedimentation acceleration device 15 in the sedimentation tank 13 can accelerate the sedimentation of sediments, improve the sewage removal efficiency, and enable the sewage to fully contact and mix with the chemical agents and powders, improving the coagulation and adsorption efficiency. The hydrolysis tank 12 can degrade the organic substances in the sewage, reduce ammonia nitrogen emissions, remove COD in the sewage, improve the biodegradability of the sewage. The wetland plant layer 4 can absorb the harmful substances in the sewage, control water pollution, and at the same time release oxygen into the water body, which can increase the activity of the water body and help maintain the balance of the wetland ecosystem. The sand layer 5 and the gravel layer 6 provide an attachment matrix for the microorganisms in the wetland. These microorganisms can effectively absorb, degrade, and transform the pollutants in the sewage. The pebble layer 7 can fix the wetland bottom, enhance the stability and durability of the wetland and play a filtering role. The purified water is re-discharged into the water body 1 through the outlet pipe 9 to improve the water quality of the water body.

[0034] Specifically, in combination with Figure 1 and Figure 3As shown in the figure, a guiding partition plate 16 is provided in the sedimentation tank 13. A sedimentation area 17 is formed between the guiding partition plate 16 and the inner side wall of the sedimentation tank 13 near the sedimentation inlet pipe 46, and a water outlet area 18 is formed between the guiding partition plate 16 and the other inner side wall of the sedimentation tank 13. A sedimentation outlet pipe 44 communicating with the hydrolysis tank 12 is provided on the side wall of the water outlet area 18. A sedimentation outlet water pump 45 is provided on the sedimentation outlet pipe 44. A filtering assembly 19 is provided at the lower end of the sedimentation outlet pipe 44 in the water outlet area 18, and a baffle 20 is further provided at the lower end of the water outlet area 18.

[0035] The contact and mixing of sewage with chemical agents and powders are carried out in the sedimentation area 17. The guiding partition plate 16 plays a blocking role. The sediment generated in the sedimentation area 17 naturally settles to the bottom end of the sedimentation area 17. The sedimentation outlet pipe 44 and the sedimentation outlet water pump 45 can guide the sewage from the water outlet area 18 into the hydrolysis tank 12. The filtering assembly 19 at the bottom end of the water outlet area 18 can isolate particulate matters, and the baffle 20 at the lower end of the water outlet area 18 is used to isolate sediments.

[0036] Specifically, in combination with Figure 1 and Figure 2 As shown in the figure, a biological floating island 21 is provided at the upper end of the wetland pond 2. The biological floating island 21 includes a floating layer 22, a filter material layer 23 and an aquatic plant layer 24 which are distributed in sequence from bottom to top. The floating layer 22 floats on the wetland water body layer 3 by its own buoyancy.

[0037] The biological floating island 21 floats on the wetland water body layer 3 through the floating layer 22. The aquatic plant layer 24 on the biological floating island 21 can absorb harmful substances in the sewage of the wetland water body layer 3 and generate oxygen through photosynthesis, thus helping to improve the water quality. The microorganisms in the filter material layer 23 can decompose the pollutants in the sewage to purify the water quality.

[0038] Specifically, in combination with Figure 1 and Figure 2 As shown in the figure, the wetland plant layer 4 and the aquatic plant layer 24 respectively include submerged plants 25 and aquatic plants 26. The roots of the submerged plants 25 and the aquatic plants 26 are respectively rooted in the soil of the wetland plant layer 4 and the aquatic plant layer 24. An oxygenation device 27 is further provided in the wetland water body layer 3. The oxygenation device 27 includes an aeration pipe 28 laid in the wetland water body layer 3. A number of aeration holes 29 are evenly distributed on the pipe walls on both sides of the aeration pipe 28. The air inlet end of the aeration pipe 28 is connected to an external aeration blower. An aeration round head 30 is inserted into the aeration hole 29, and a number of micropores are evenly distributed at the top end of the aeration round head 30.

[0039] The root systems of submerged plants 25 and aquatic plants 26 are well-developed, with strong tolerance to sewage. They can absorb harmful substances in sewage, control water pollution. The aeration blower operates to deliver air into the aeration pipe 28. The air enters the interior of the aeration round head 30 through the aeration holes 29 and diffuses out from the micropores of the aeration round head 30 in the form of microbubbles into the sewage. The microbubbles have a larger contact area with water and a longer residence time in the sewage, improving the oxygen mass transfer efficiency, increasing the oxygen content in the sewage, enhancing the activity of the water body, and contributing to maintaining the balance of the wetland ecosystem.

[0040] Specifically, as shown in combination with Figure 1 and Figure 3 The guiding partition 16 is vertically arranged. The sedimentation acceleration device 15 includes a rotating shaft 31 vertically penetrating the top end of the sedimentation tank 13 and extending into the sedimentation tank 13. Stirring blades 32 are provided on the rotating shaft 31. A rotating drive 33 is provided at the top end of the sedimentation tank 13, and the output end of the rotating drive 33 is connected to the upper end of the rotating shaft 31.

[0041] The stirring blades 32 include a hub 41 sleeved on the rotating shaft 31. Blades 42 are provided on the outer side of the hub 41. Positioning sleeves 43 are respectively provided at both ends of the hub 41, and the positioning sleeves 43 are detachably connected to the rotating shaft 31 through bolt connectors.

[0042] When the rotating drive 33 operates, the output end of the rotating drive 33 rotationally drives the rotating shaft 31 to rotate. The stirring blades 32 on the rotating shaft 31 rotate accordingly, enabling the sewage to fully contact and mix with the chemical agent and powder, and generating a swirl in the sedimentation tank 13. The generated swirl can accelerate the sedimentation of the sediment, thereby improving the sedimentation efficiency.

[0043] Specifically, as shown in combination with Figure 1 and Figure 3 A sedimentation pool 34 is provided at the bottom end of the sedimentation tank 13. The inner side wall of the sedimentation pool 34 on the side away from the guiding partition 16 is inclined towards the inner end of the sedimentation pool 34. A discharge channel 35 is provided at the bottom of the sedimentation pool 34. An anti-blocking component 36 is also provided in the sedimentation pool 34. The bottom end of the rotating shaft 31 extends into the sedimentation pool 34. The anti-blocking component 36 includes a plurality of stirring rods 37 horizontally inserted on the lower end of the rotating shaft 31 and vertically distributed. A jack 38 is provided on the outer wall of the bottom end of the rotating shaft 31, and the stirring rods 37 are threadedly connected to the jacks 38.

[0044] The inner side wall of the sedimentation pool 34 is inclined, which plays a role in guiding the sedimentation of the sediment and can improve the sedimentation efficiency. The length of the vertically distributed stirring rods 37 is adapted to the inclined inner wall of the sedimentation pool 34. The stirring rods 37 can rotate following the rotating shaft 31 and stir in the sedimentation pool 34 to prevent the sediment from sticking and caking in the sedimentation pool 34, thus causing the blockage of the discharge channel 35.

[0045] Specifically, in combination with Figure 1 and Figure 3 as shown, the filtering component 19 includes a coarse filter screen 39 disposed at the bottom end of the water outlet area 18, and a plurality of fine filter screens 40 are sequentially distributed above the coarse filter screen 39 in the water outlet area 18.

[0046] The coarse filter screen 39 can perform a preliminary coarse filtration on the particulate impurities and sediment still free in the sewage, and the fine filter screen 40 performs a fine filtration on the sewage entering the water outlet area 18, and can effectively isolate the particulate impurities from entering the hydrolysis tank 12.

[0047] Specifically, in combination with Figure 1 and Figure 2 as shown, various microorganisms are cultured in the hydrolysis tank 12, the sediment outlet pipe 44 is located at the upper side of one end of the hydrolysis tank 12, and the inlet pipe 8 is located at the lower end of the other side of the hydrolysis tank 12.

[0048] The sewage enters the hydrolysis tank 12 and flows from top to bottom. The various microorganisms in the hydrolysis tank 12 can fully contact and react with the sewage to degrade the organic substances in the sewage, reduce ammonia nitrogen emissions, remove COD from the sewage, and improve the biodegradability of the sewage.

[0049] The working principle of the present utility model is as follows: The sedimentation tank 13 can introduce the sewage in the water body 1 into the sedimentation tank 13 through the sedimentation inlet pipe 46 and the sedimentation inlet pump 47. Chemical agents and powders are added from the powder inlet 14 at the top of the sedimentation tank 13. The rotary driver 33 operates to drive the stirring blades 32 to rotate, enabling the sewage to fully contact and mix with the chemical agents and powders, and a swirling flow can be generated in the sedimentation tank 13, and the generated swirling flow can accelerate the sedimentation of the sediment; The sewage treated by the sedimentation tank 13 enters the hydrolysis tank 12 and flows from top to bottom. The various microorganisms in the hydrolysis tank 12 can fully contact and react with the sewage to degrade the organic substances in the sewage, reduce ammonia nitrogen emissions, remove COD from the sewage, and improve the biodegradability of the sewage;

[0050] The sewage after hydrolysis flows through the inlet pipe 8 and the inlet pump 10 to the wetland water layer 3 of the wetland pond 2, and sequentially flows through the wetland plant layer 4, the sand layer 5, the gravel layer 6 and the pebble layer 7 from top to bottom, completing the final purification and being re-discharged into the water body 1 through the outlet pipe 9 and the outlet pump 11 to improve the water quality of the water body;

[0051] The submerged plants 25 and the aquatic plants 26 can absorb the harmful substances in the sewage and control water pollution. The microorganisms in the sand layer 5 and the gravel layer 6 can effectively absorb, degrade and transform the pollutants in the sewage; The oxygenation device 27 can increase the oxygen content in the sewage, can increase the activity of the water body, and helps to maintain the balance of the wetland ecosystem.

[0052] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the technical field to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

[0053] Although terms such as water body 1, wetland pond 2, wetland water layer 3, wetland plant layer 4, sand layer 5, gravel layer 6, pebble layer 7, inlet pipe 8, outlet pipe 9, inlet water pump 10, outlet water pump 11, hydrolysis tank 12, sedimentation tank 13, powder inlet 14, sedimentation acceleration device 15, guiding partition 16, sedimentation area 17, water outlet area 18, filtering component 19, baffle 20, biological floating island 21, floating layer 22, filter media layer 23, aquatic plant layer 24, submerged plant 25, aquatic plant 26, aeration device 27, aeration pipe 28, aeration hole 29, aeration round head 30, rotating shaft 31, stirring blade 32, rotating drive 33, sedimentation pond 34, discharge channel 35, anti-blocking component 36, stirring rod 37, jack 38, coarse filter screen 39, fine filter screen 40, hub 41, blade 42, positioning sleeve 43, sedimentation outlet pipe 44, sedimentation outlet water pump 45, sedimentation inlet pipe 46, sedimentation inlet water pump 47, etc. are used more frequently herein, using these terms is only for more convenient description and explanation of the essence of the present utility model; interpreting them as any additional limitation is contrary to the spirit of the present utility model.

Claims

1. A closed water body ecological restoration system, characterized in that: The invention comprises a wetland pool (2) arranged in a water body (1), wherein a wetland water layer (3), a wetland plant layer (4), a sand layer (5), a gravel layer (6) and a pebble layer (7) are sequentially distributed in the wetland pool (2) from top to bottom, an inlet pipe (8) and an outlet pipe (9) are respectively arranged in the wetland water layer (3) and the pebble layer (7) on both sides of the wetland pool (2), an inlet pump (10) and an outlet pump (11) are respectively arranged on the inlet pipe (8) and the outlet pipe (9), the inlet pipe (8) and the outlet pipe (9) are respectively connected to a hydrolysis tank (12) and a sedimentation tank (13) in sequence, one side of the sedimentation tank (13) is connected to the water body (1) through a sedimentation inlet pipe (46) and a sedimentation inlet pump (47), a powder inlet (14) is arranged at the top of the sedimentation tank (13), and a sedimentation acceleration device (15) capable of accelerating the sedimentation of sediment is arranged in the sedimentation tank (13).

2. The closed water body ecological restoration system according to claim 1 is characterized in that: A guide baffle (16) is provided in the sedimentation tank (13), a sedimentation zone (17) is formed between the guide baffle (16) and the inner side wall of the sedimentation tank (13) near the sedimentation water inlet pipe (46), a water outlet zone (18) is formed between the guide baffle (16) and the other inner side wall of the sedimentation tank (13), a sedimentation water outlet pipe (44) connected to the hydrolysis tank (12) is provided on the side wall of the water outlet zone (18), a sedimentation water outlet pump (45) is provided on the sedimentation water outlet pipe (44), a filter assembly (19) is provided at the lower end of the sedimentation water outlet pipe (44) in the water outlet zone (18), and a baffle (20) is also provided at the lower end of the water outlet zone (18).

3. The closed water body ecological restoration system according to claim 1 is characterized in that: A biological floating island (21) is provided at the upper end of the wetland pool (2). The biological floating island (21) comprises a floating layer (22), a filter material layer (23) and an aquatic plant layer (24) which are sequentially distributed from bottom to top. The floating layer (22) floats on the wetland water layer (3) by utilizing its own buoyancy.

4. The closed water body ecological restoration system according to claim 3 is characterized in that: The wetland plant layer (4) and the aquatic plant layer (24) respectively include submerged plants (25) and aquatic plants (26), and the roots of the submerged plants (25) and the aquatic plants (26) are respectively rooted in the soil of the wetland plant layer (4) and the aquatic plant layer (24), and an oxygenation device (27) is also provided in the wetland water layer (3).

5. The closed water body ecological restoration system according to claim 4 is characterized in that: The oxygenation device (27) comprises an aeration pipe (28) laid in the wetland water layer (3), a plurality of aeration holes (29) are evenly distributed on the pipe walls on both sides of the aeration pipe (28), an air inlet end of the aeration pipe (28) is connected to an external aeration blower, an aeration round head (30) is inserted into the aeration hole (29), and a plurality of micropores are evenly distributed on the top of the aeration round head (30).

6. The closed water body ecological restoration system according to claim 2 is characterized in that: The guide baffle (16) is arranged vertically, and the sedimentation acceleration device (15) includes a rotating shaft (31) vertically penetrating the top of the sedimentation tank (13) and extending into the sedimentation tank (13), and a stirring blade (32) is arranged on the rotating shaft (31). The top of the sedimentation tank (13) is provided with a rotating driver (33), and the output end of the rotating driver (33) is connected to the upper end of the rotating shaft (31).

7. The closed water body ecological restoration system according to claim 6, characterized in that: A sedimentation tank (34) is provided at the bottom end of the sedimentation tank (13). The inner side wall of the sedimentation tank (34) away from the guide baffle (16) is inclined toward the inner end of the sedimentation tank (34). A discharge channel (35) is provided at the bottom of the sedimentation tank (34). An anti-blocking component (36) is also provided in the sedimentation tank (34).

8. The closed water body ecological restoration system according to claim 7, characterized in that: The bottom end of the rotating shaft (31) extends into the sedimentation tank (34), and the anti-blocking assembly (36) includes a plurality of stirring rods (37) horizontally inserted on the lower end of the rotating shaft (31) and distributed vertically. An insertion hole (38) is provided on the outer wall of the bottom end of the rotating shaft (31), and the stirring rod (37) is threadedly connected to the insertion hole (38).

9. The closed water body ecological restoration system according to claim 2, characterized in that: The filtering assembly (19) comprises a coarse filter (39) arranged at the bottom end of the water outlet area (18), and a plurality of fine filter screens (40) are sequentially distributed above the coarse filter (39) in the water outlet area (18).

10. The closed water body ecological restoration system according to claim 2, characterized in that: Various microorganisms are cultured in the hydrolysis tank (12), the sedimentation outlet pipe (44) is located at one side of the upper end of the hydrolysis tank (12), and the water inlet pipe (8) is located at the lower end of the other side of the hydrolysis tank (12).

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