Urban water body purification system

Abstract

The application provides a city water body purification system, which comprises a filtering system, an aeration system and a purification system arranged in the water body, is divided into different zones according to the depth of different positions of the water body, and plants submersed plants and floating plants in a deep water zone and plants floating plants and emergent plants in a shallow water zone; the filtering system comprises a grid filtering device and an ecological corridor; the grid filtering device is arranged at a drain outlet of the water body and is used for intercepting garbage in overflow rainwater and sewage of the drain outlet; the ecological corridor is arranged along the bank of the water body; the purification system comprises annular purification devices arranged at intervals in the water body and a drain outlet purification device arranged at the drain outlet; the annular purification devices and the drain outlet purification device are filled with phosphorus removal filter stones and are used for adsorbing phosphorus in the water body. The city water body purification system can effectively improve water quality, promote ecological balance of the water body, beautify the environment and provide a more healthy and livable city environment for citizens.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ecological environmental protection, and particularly relates to a city water purification system. BACKGROUND

[0002] City water bodies, such as inner lakes, wetlands, pits, etc., are usually small in area, numerous in quantity, and in a non-flowing or semi-flowing state, and collect rainwater and sewage from surrounding city drainage systems, surface runoff, atmospheric deposition, and natural rainfall. Some water bodies are seriously polluted by surrounding industrial pollution sources, agricultural pollution sources, domestic pollution sources, urban non-point pollution sources, and sediment pollution sources, and the content of oxygen-consuming organic pollutants and nitrogen and phosphorus nutrients is high, and seasonal and perennial water body blackening, green algae explosion, and water pollution and ecological degradation are prominent.

[0003] Generally, water purification technologies are mainly divided into three categories: physical, chemical, and biochemical. Physical purification is not complete, chemical treatment is efficient but easy to cause secondary pollution, and biochemical treatment is pollution-free but low in efficiency. In terms of space, there are ex-situ and in-situ treatments. Ex-situ treatment usually involves lifting water to the treatment facilities on the shore of the water body for centralized treatment, which is high in efficiency but large in land occupation, and in-situ treatment involves purifying water directly in the water body, which is small in land occupation but long in purification effect. SUMMARY

[0004] The main purpose of the present application is to provide a city water purification system to solve the problems in the background art.

[0005] To solve the above technical problems, the technical solution adopted by the present application is: a filter system, an aeration system, and a purification system are arranged in the water body, and the water body is divided into different zones according to the depth of different positions, submerged plants and floating plants are planted in deep water areas, and floating plants and emergent plants are planted in shallow water areas;

[0006] The filter system comprises a grid filter device and an ecological corridor. The grid filter device is arranged at the outlet of the water body to intercept garbage in the overflow rainwater and sewage. The ecological corridor is arranged along the shore of the water body.

[0007] The aeration system is arranged in the center of the water body to generate micro-bubbles in the water body, thereby improving the water quality.

[0008] The purification system comprises annular purification devices arranged in the water body at intervals and an outlet purification device arranged at the outlet. The annular purification devices and the outlet purification device are filled with phosphorus-removing filter stones to adsorb phosphorus in the water body.

[0009] Preferably, the ecological corridor uses aquatic plants with developed root systems and easy survival to block the pollutants in the surface runoff.

[0010] Preferably, the aeration system comprises an aeration device, a conveying pipe and a blower, the blower is communicated with the aeration device through the conveying pipe, and the blower is arranged on the bank.

[0011] Preferably, the support frame in the aeration device is sunk into the bottom of the water body, one side of the support frame is provided with an air inlet pipe, a plurality of oxygenation fiber membranes are arranged in the support frame, the end of the oxygenation fiber membrane is communicated with the air inlet pipe, and the other end of the air inlet pipe is communicated with the blower through the conveying pipe.

[0012] Preferably, the bottom of the annular support frame in the annular purification device is sunk into the bottom of the water body, the top of the annular support frame is provided with a floating annular float, aquatic plants are planted on the annular float, and the phosphorus removal filter stone is filled in the annular support frame.

[0013] Preferably, the center position of the annular support frame is provided with a floating float, a spray head is fixedly arranged in the middle of the float, and the bottom of the spray head is communicated with a submersible pump at the bottom of the water body through an extension pipe.

[0014] Preferably, the float is connected with the annular support frame through a pull rope around the float, so that the float is located at the center position of the annular support frame.

[0015] Preferably, the bottom of the submersible pump is fixedly provided with a fixing frame, which is used for supporting the submersible pump above the sludge at the bottom of the water body.

[0016] Preferably, the outlet purification device comprises a walkway support frame, the two sides of the walkway support frame are fixed cages, a walkway plate is arranged on the top of the walkway support frame to form a water overpass, and the phosphorus removal filter stone is filled in the fixed cage.

[0017] The walkway support frame is arranged along the direction of the outlet, sewage flowing into the outlet is located in the walkway support frame and flows, and is filtered by the phosphorus removal filter stone on the two sides and then discharged.

[0018] Preferably, aquatic plants are planted along the outside of the walkway support frame.

[0019] The present application provides a city water purification system, and the beneficial effects are as follows:

[0020] 1. Water quality purification: the aeration system increases the dissolved oxygen content in the water body, promotes the activity of microorganisms, and helps to degrade organic matter in the water body. The grid filter device in the filter system intercepts the garbage in the outlet overflow rain sewage, reduces the pollution of solid waste to the water body. The aquatic plants in the ecological corridor further filter the pollutants in the surface runoff, and reduce the amount of pollutants entering the water body. The phosphorus removal filter stone in the purification system adsorbs the phosphorus element in the water body, reduces the eutrophication phenomenon, and improves the water quality.

[0021] 2. Microbial activity promotion: The oxygenated fiber membranes in the aeration device promote the growth of microorganisms, forming a biofilm that can degrade pollutants such as COD, N, and P in the water body. The combined action of phosphorus removal filter stones and aquatic plants in the ring-shaped purification device improves the activity efficiency of microorganisms, further purifying the water quality.

[0022] 3. Water circulation: The submersible pump and spray head in the ring-shaped purification device promote the circulation of water, increasing the dissolved oxygen content of the water body and helping to maintain the ecological balance of the water body. The phosphorus removal filter stones in the outlet purification device filter the sewage flowing from the outlet, reducing the discharge of pollutants.

[0023] 4. Ecological benefits: The aquatic plants in the plant zoning not only absorb nutrients from the water body but also provide habitats for aquatic organisms, increasing biodiversity. The plants in the ecological corridor enhance the stability of the water body's shore, preventing soil erosion.

[0024] 5. Convenient maintenance and management: The fixed frame ensures that the submersible pump is away from the silt, reducing the risk of silt blockage and facilitating maintenance. The water stack facilitates daily maintenance and inspection by staff, improving maintenance efficiency.

[0025] 6. Beautifying the environment: The aquatic plants in the ecological corridor and outlet purification device beautify the environment around the water body, enhancing the value of urban landscapes. The entire system significantly enhances the self-purification capacity of the water body through the comprehensive use of physical, chemical, and biological means, promoting the health and stability of the water ecosystem. BRIEF DESCRIPTION OF DRAWINGS

[0026] The invention will be further described below in conjunction with the drawings and examples:

[0027] Figure 1 is the overall structure of the invention top view;

[0028] Figure 2 is the aeration device of the invention front view;

[0029] Figure 3 is the ring-shaped purification device of the invention top view;

[0030] Figure 4 is the front sectional view of the invention Figure 3 ;

[0031] Figure 5 is the outlet purification device of the invention front sectional view;

[0032] In the diagram: Aeration system 1; Support frame 101; Oxygenated fiber membrane 102; Air inlet pipe 103; Annular purification device 2; Annular support frame 201; Annular float 202; Fixing strip 203; Pull rope 204; Float 205; Nozzle 206; Telescopic pipe 207; Submersible pump 208; Fixing frame 209; Outlet purification device 3; Walkway support frame 301; Walkway slab 302; Outlet 4; Phosphorus removal filter stone 5. Detailed Implementation

[0033] Example 1

[0034] like Figures 1-5 As shown, an urban water purification system includes a filtration system, an aeration system 1, and a purification system installed in the water body. The system is divided into zones according to the depth of different locations in the water body, with submerged and floating plants planted in the deep water zone and floating and emergent plants planted in the shallow water zone.

[0035] The filtration system includes a bar screen filter and an ecological corridor. The bar screen filter is installed at four outlets of the water body to intercept garbage in the overflowing rainwater and sewage. The ecological corridor is set along the bank of the water body.

[0036] The aeration system compartment 1 is located in the center of the water body and is used to generate microbubbles in the water body, thereby improving water quality;

[0037] The purification system includes annular purification devices 2 spaced apart in the water body and outlet purification devices 3 located at outlet 4. The annular purification devices 2 and outlet purification devices 3 are filled with phosphorus removal filter stones 5 for adsorbing phosphorus in the water body.

[0038] The aeration system is evenly distributed in the water body. By generating tiny bubbles, it increases the dissolved oxygen content of the water, which helps to improve the activity of microorganisms in the water, promotes the decomposition of organic matter, and also helps to remove harmful gases such as hydrogen sulfide from the water.

[0039] The annular purification devices 2 are spaced apart in the water body. The phosphorus removal filter stones inside can adsorb phosphorus in the water body and reduce eutrophication.

[0040] The discharge purification device 3 is located at the water discharge outlet and also uses phosphorus removal filter stones to adsorb pollutants from the discharge outlet, especially phosphorus.

[0041] A bar screen filter is installed at the water outlet to intercept solid waste and prevent large particles from entering the water. Regularly clean the bar screen filter to remove debris and prevent clogging of the outlet.

[0042] Ecological corridors are arranged along the banks of water bodies, using the vegetation and aquatic plants on the banks to form a natural filter belt, further removing suspended solids and pollutants.

[0043] Deep water areas are planted with submerged plants and floating plants. Submerged plants can absorb nutrients in the water, reducing algae growth; floating plants can block sunlight, inhibiting excessive algae reproduction.

[0044] Shallow water areas are planted with floating plants and emergent plants. Floating plants also play a role in shading, while emergent plants can stabilize the soil, prevent erosion, and also provide habitat for aquatic organisms.

[0045] Preferably, the ecological corridor uses water plants with well-developed root systems that are easy to survive, to block pollutants in surface runoff. Rooted aquatic plants with well-developed root systems are selected as the main component of the ecological corridor. Such plants usually have strong water absorption capacity and nutrient salt absorption capacity, and can effectively absorb nitrogen, phosphorus and other nutrients from water, reducing the problem of eutrophication caused by these substances.

[0046] The ecological corridor is set along the shore of the water body, which can intercept pollutants brought by surface runoff. Surface runoff usually carries soil particles, organic matter, pesticide residues and other pollutants, which can pollute the water body. By planting these plants, suspended particles and pollutants in surface runoff can be effectively filtered out, reducing the impact on the water body.

[0047] The ecological corridor not only helps to purify water quality, but also provides habitat for aquatic organisms and builds a healthy water ecosystem. For example, some plants can attract insects and other small animals, and then attract predators such as birds, forming a complete food chain. In addition to ecological functions, the ecological corridor can also beautify the environment around the water body, enhance the value of urban landscape, and provide space for citizens to relax and entertain.

[0048] Preferably, the aeration system 1 includes an aeration device, a delivery pipe and a blower, the blower is in communication with the aeration device through the delivery pipe, and the blower is arranged on the shore. The aeration device is arranged in the center of the water body or the position where the dissolved oxygen needs to be increased. Air or oxygen is released into the water body through the aeration device to form tiny bubbles, increase the dissolved oxygen content of the water body, promote the activity of aerobic microorganisms in the water body, and accelerate the decomposition of organic matter.

[0049] The delivery pipe connects the blower and the aeration device. The compressed air generated by the blower is delivered to the aeration device. The blower is arranged on the shore and is usually installed on a stable foundation to reduce noise and vibration. The aeration system provides compressed air or oxygen, which is sent to the aeration device through the delivery pipe.

[0050] Blower start: when the aeration system starts, the blower starts to work, sucking the outside air and transporting it to the underwater aeration device through the conveying pipe. Aeration device work: the aeration device disperses compressed air into a large number of tiny bubbles, which will fully contact with the water body during rising to the water surface, increasing the dissolved oxygen concentration in the water body. Promote biological activity: increased dissolved oxygen promotes the activity of microorganisms in the water body, helping to decompose organic matter and pollutants in the water, improving water quality.

[0051] The aeration system not only improves water quality, but also helps to control odor and harmful gases in the water body, improving the overall ecological environment quality of the water body. In addition, by adjusting the number and distribution of aeration devices, the aeration effect can be optimized according to the specific situation of the water body.

[0052] Preferably, the support frame 101 in the aeration device sinks into the bottom of the water body, one side of the support frame 101 is provided with an air inlet pipe 103, and a plurality of oxygenation fiber membranes 102 are arranged in the support frame 101. The end of the oxygenation fiber membrane 102 is communicated with the air inlet pipe 103, and the other end of the air inlet pipe 103 is communicated with the blower through the conveying pipe. The support frame 101 is used to support the plurality of oxygenation fiber membranes 102, so as to avoid being covered by silt when sinking to the bottom. The gas introduced from the oxygenation fiber membrane 102 generates tiny bubbles, which mix with the water body. The oxygen in the air is transferred from the gas phase to the liquid phase, increasing the dissolved oxygen content of the water body. Microorganisms adhere to the surface of the oxygenation fiber membrane to form a biofilm. When sewage flows around the oxygenation fiber membrane, pollutants in the water body enter the biofilm under the action of concentration difference and microbial adsorption. Through the oxygen metabolism of the outer layer of the biofilm, the anoxic metabolism of the middle layer, the anaerobic metabolism and growth of the inner layer, COD, N, P and other substances in the water body are absorbed and degraded, thereby realizing the purification of the water body.

[0053] The support frame 101 sinks into the bottom of the water body. The support frame 101 supports the oxygenation fiber membrane 102, so as to ensure that they are not covered by silt and maintain good aeration effect. The oxygenation fiber membranes 102 are uniformly distributed on the support frame 101. When the gas passes through the oxygenation fiber membrane 102, a large number of tiny bubbles will be generated on the surface of the membrane, which will contact and mix with the water body, increasing the dissolved oxygen content in the water body.

[0054] One end of the air inlet pipe 103 is connected with the oxygenation fiber membrane 102, and the other end is connected with the blower through the conveying pipe. The compressed air or oxygen provided by the blower is transported into the oxygenation fiber membrane 102.

[0055] The air blower sends compressed air or oxygen into the air inlet pipe 103 through the delivery pipe. The air inlet pipe 103 evenly distributes the gas to each oxygenation fiber membrane 102. The gas diffuses through the oxygenation fiber membrane 102 to form tiny bubbles, which rise and contact the water body, increasing the dissolved oxygen in the water body. Microorganisms attach to the surface of the oxygenation fiber membrane 102 to form a biofilm. Organic matter, nitrogen, phosphorus, and other pollutants in the water body are degraded by the biofilm. The outer layer of microorganisms undergoes aerobic metabolism, consuming oxygen and degrading organic matter. The middle layer of microorganisms undergoes anoxic metabolism, using nitrate as an electron acceptor to degrade organic matter. The inner layer of microorganisms undergoes anaerobic metabolism, participating in the denitrification process of ammonia nitrogen.

[0056] Preferably, the bottom of the annular support frame 201 is submerged in the water body, and the top of the annular support frame 201 is provided with a floating annular float 202, which is planted with aquatic plants. The phosphorus removal filter stone 5 is filled inside the annular support frame 201.

[0057] Preferably, a floating float 205 is provided at the center of the annular support frame 201, and a spray head 206 is fixed in the middle of the float 205. The bottom of the spray head 206 is connected to a submersible pump 208 at the bottom of the water body through a telescopic pipe 207. The submersible pump 208 sprays the water inside the annular support frame 201 from the spray head 206 to the outside of the annular support frame 201 through the telescopic pipe 207, thereby circulating the water inside and outside the annular support frame 201.

[0058] The bottom of the annular support frame 201 is submerged in the water body. The structure supports the entire annular purification device, ensuring the stability of the phosphorus removal filter stone 5 and the aquatic plants.

[0059] The annular float 202 is located at the top of the annular support frame 201. It provides buoyancy to maintain the stability of the entire device and is planted with aquatic plants, which help absorb nutrients such as nitrogen and phosphorus from the water body. A fixed strip 203 is fixed at the top of the annular support frame 201 to restrict the annular float 202 to the top of the annular support frame 201. The phosphorus removal filter stone 5 is filled inside the annular support frame 201. It adsorbs phosphorus in the water body, reduces water eutrophication, and improves water quality.

[0060] The center float 205 and the spray head 206 are located at the center of the annular support frame 201. The submersible pump 208 pumps water from the bottom of the water body to the spray head 206, and then sprays it to the outside of the annular support frame 201, promoting the circulation of the water body. The submersible pump 208 is located at the bottom of the water body, and the telescopic pipe 207 connects the submersible pump 208 and the spray head 206. The submersible pump 208 pumps water from the inside of the water body to the spray head 206 through the telescopic pipe 207, and then sprays it out, which not only increases the dissolved oxygen content of the water body, but also promotes the circulation of the water body.

[0061] The working principle of the annular purification device 2 is as follows: water circulation: the submersible pump 208 draws the water in the annular support frame 201 through the telescopic pipe 207 to the spray head 206, and then sprays it outside the annular support frame 201, forming a circulating flow of the water body. Dissolved oxygen increase: the circulating flow of the water body increases the contact area between the water body and the air, thereby increasing the dissolved oxygen content in the water body. Aquatic plant purification: aquatic plants planted on the annular float 202 can absorb nutrients in the water body, reducing water eutrophication. Phosphorus removal filter stone adsorption: the phosphorus removal filter stone 5 adsorbs phosphorus in the water body, reducing the content of phosphorus and reducing the risk of water eutrophication. Microbial activity: the circulating flow of the water body and the increased dissolved oxygen content promote the activity of beneficial microorganisms, helping to decompose organic matter in the water body and further improve water quality.

[0062] Preferably, the float 205 is connected to the annular support frame 201 by a pull rope 204 around the circumference of the float 205, so that the float 205 is located at the center of the annular support frame 201. The float 205 is located at the center of the annular support frame 201, supporting the spray head 206 and related pipe structure, while providing a certain amount of buoyancy to ensure the stability of the entire device.

[0063] One end of the pull rope 204 is fixed to the float 205, and the other end is fixed to the annular support frame 201. The float 205 is connected to the annular support frame 201 by the pull rope 204, ensuring that the float 205 can remain stable on the water surface, even in the case of water flow fluctuations.

[0064] The spray head 206 is installed in the middle of the float 205. The water is sprayed from the inside of the annular support frame 201 to the outside, promoting the circulating flow of the water body. The telescopic pipe 207 is connected to the bottom of the spray head 206 at one end and to the submersible pump 208 at the other end. The water pumped out by the submersible pump 208 is transmitted to the spray head 206.

[0065] The float 205 is stably maintained at the center of the annular support frame 201 by the pull rope 204, and can remain stable even in the case of water flow fluctuations. The combination of the submersible pump 208 and the spray head 206 allows the water body to circulate, increasing the dissolved oxygen content in the water body and promoting microbial activity, which helps to purify the water body. Since the float 205 is connected to the annular support frame 201 by the pull rope 204, it can be relatively easy to maintain and inspect.

[0066] Preferably, the submersible pump 208 is provided with a fixed frame 209 at the bottom, which is used to support the submersible pump 208 above the sludge at the bottom of the water body. The fixed frame 209 is located at the bottom of the submersible pump 208. The submersible pump 208 is supported so that it is higher than the sludge at the bottom of the water body. This avoids direct contact between the submersible pump 208 and the sludge, reduces the possibility of sludge being sucked in, and prolongs the service life of the submersible pump 208.

[0067] Prevent silt blockage: Ensure the submersible pump 208 is away from silt, reduce the risk of inhaling silt, avoid the blockage of the pump. Improve efficiency: The submersible pump 208 can extract clean water more efficiently, improve the effect of water circulation. Prolong the service life: Reduce the wear and tear of the submersible pump 208 by silt, prolong its service life. Easy maintenance: The design of the fixed frame 209 makes it easier to carry out daily inspection and maintenance of the submersible pump 208.

[0068] Preferably, the outlet purification device 3 includes a walkway support frame 301, both sides of which are fixed cages, and a walkway plate 302 is laid on the top of the walkway support frame 301 to form a water overpass, and the phosphorus removal filter stone 5 is filled in the fixed cage;

[0069] The walkway support frame 301 is arranged along the direction of the outlet 4, and the sewage flowing into the outlet 4 is located in the walkway support frame 301 and flows out after being filtered by the phosphorus removal filter stone 5 on both sides. The walkway support frame 301 is arranged along the direction of the outlet 4. The structure supports the entire outlet purification device, ensuring the stability of the phosphorus removal filter stone 5 and the water overpass.

[0070] The fixed cage is located on both sides of the walkway support frame 301. The fixed phosphorus removal filter stone 5 ensures its stable position and does not move with the water flow. The walkway plate 302 is laid on the top of the walkway support frame 301. It forms a water overpass, which is convenient for staff to pass through and maintain.

[0071] The phosphorus removal filter stone 5 is filled in the fixed cage. It can adsorb phosphorus elements in the water body, reducing water eutrophication.

[0072] The working principle of the outlet purification device 3 is as follows: the sewage flowing into the outlet 4 first enters the inside of the walkway support frame 301. When the sewage flows in the walkway support frame 301, the phosphorus removal filter stone 5 on both sides can adsorb the phosphorus elements in the sewage, reducing the phosphorus content in the water body, thereby reducing the risk of water eutrophication. The water filtered by the phosphorus removal filter stone 5 is discharged from both ends or the bottom of the walkway support frame 301 and enters the water body.

[0073] Preferably, aquatic plants are planted along the outside of the walkway support frame 301. The aquatic plants are planted on the outside of the walkway support frame 301. Aquatic plants can help purify water quality by absorbing nutrients in the water body, reducing the possibility of water eutrophication. Aquatic plants provide habitats for aquatic organisms, helping to increase biodiversity. Plants can block sunlight, reducing water temperature, which is very beneficial to some aquatic organisms. By absorbing nutrients, aquatic plants can reduce the growth of algae in the water body, avoiding the occurrence of algal blooms.

[0074] Aquatic plants can beautify the environment around the water body, enhancing the landscape value of the city. It provides citizens with a natural leisure place, enhancing human interaction with nature.

[0075] Select aquatic plant varieties suitable for local climate conditions to ensure healthy plant growth. Regularly prune and clean dead plants to avoid affecting the flow and purification effect of the water body. Monitor the nutrient salt content of the water body and take measures to adjust the plant species or density as needed to achieve the best purification effect.

[0076] The above embodiments are only preferred technical solutions of the present application, and should not be regarded as limitations of the present application. The protection scope of the present application should be based on the technical solutions recited in the claims, including equivalent replacement solutions of the technical features recited in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present application.

Claims

1. A system for purifying urban water bodies, characterized by: The filter system, the aeration system (1) and the purification system are arranged in the water body, and the water body is divided into different zones according to the depth of different positions, the submerged plants and the floating plants are planted in the deep water area, and the floating plants and the emergent plants are planted in the shallow water area; The filter system comprises a grid filter device and an ecological corridor, the grid filter device is arranged at the drain outlet (4) of the water body and is used for intercepting garbage in the overflow rainwater and sewage of the drain outlet, and the ecological corridor is arranged along the bank of the water body; The aeration system (1) is arranged in the center of the water body and is used for generating micro bubbles in the water body, so as to improve the water quality. The purification system comprises annular purification devices (2) and drain outlet purification devices (3) which are arranged in the water body in a spaced mode, and the annular purification devices (2) and the drain outlet purification devices (3) are filled with phosphorus removal filter stones (5) and are used for adsorbing phosphorus in the water body. The bottom of the annular support frame (201) in the annular purification device (2) is sunk into the bottom of the water body, the top of the annular support frame (201) is provided with a floating annular float (202), the annular float (202) is planted with aquatic plants, and the phosphorus removal filter stones (5) are filled in the annular support frame (201). The center of the annular support frame (201) is provided with a floating float (205), the middle of the float (205) is fixedly provided with a spray head (206), and the bottom of the spray head (206) is communicated with a submersible pump (208) at the bottom of the water body through an extension pipe (207). The drain outlet purification device (3) comprises a walkway support frame (301), and the both sides of the walkway support frame (301) are fixed cages, the top of the walkway support frame (301) is paved with a walkway plate (302) to form a water deck, and the phosphorus removal filter stones (5) are filled in the fixed cages. The walkway support frame (301) is arranged along the direction of the drain outlet (4), sewage flowing into the drain outlet (4) is located in the walkway support frame (301) and is filtered by the phosphorus removal filter stones (5) on the both sides and then discharged.

2. The urban water body purification system according to claim 1, characterized in that: The ecological corridor adopts aquatic plants with developed root systems and easy survival, and is used for blocking the pollutants of the surface runoff.

3. The urban water body purification system of claim 1, wherein: The aeration system (1) comprises an aeration device, a conveying pipe and a blower, the blower is communicated with the aeration device through the conveying pipe, and the blower is arranged on the bank.

4. The urban water body purification system of claim 3, wherein: The support frame (101) in the aeration device is sunk into the bottom of the water body, one side of the support frame (101) is provided with an air inlet pipe (103), a plurality of oxygenation fiber membranes (102) are arranged in the support frame (101), the end of the oxygenation fiber membrane (102) is communicated with the air inlet pipe (103), and the other end of the air inlet pipe (103) is communicated with the blower through the conveying pipe.

5. The urban water body purification system of claim 1, wherein: The float (205) is connected with the annular support frame (201) through a pull rope (204) around the float (205), so that the float (205) is located at the center position of the annular support frame (201).

6. The urban water body purification system of claim 1, wherein: The bottom of the submersible pump (208) is fixedly provided with a fixing frame (209) and is used for supporting the submersible pump (208) to be higher than the sludge at the bottom of the water body.

7. The urban water body purification system of claim 1, wherein: Aquatic plants are planted along the outside of the walkway support frame (301).

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