Three-dimensional photovoltaic and ecological coupling algae control system and algae control method

Abstract

The invention discloses a three-dimensional photovoltaic and ecological coupling algae control system and an algae control method, and belongs to the field of water ecological restoration. The device comprises a photovoltaic power generation and storage system, a compressed air production system, a micro-nano bubble generation system, an air stripping circulating water pump system, an algae interception and enrichment area, an ecological algae control interception area and the like. According to the operation of the system, electric energy generated by a photovoltaic panel or electric energy stored by a storage battery is used for driving an air compressor to generate compressed air to drive an air lift water pump, a dissolved air pump, a pneumatic diaphragm pump and the like to discharge microbubbles and algae-water mixed liquid to an algae interception enrichment area for enrichment, and then most algae are intercepted through an inner-layer interception net; and the residual tiny algae cells enter the outer layer ecological algae control interception area, are intercepted by a biological carrier, and are intercepted and controlled by silver carps, bighead carps, clams, snails, shrimps and the floating wetland ecological algae control system.

Description

Technical Field

[0001] This invention relates to the field of aquatic ecological restoration, specifically to a three-dimensional photovoltaic and ecological coupled algae control system and method. Background Technology

[0002] In urban rivers and lakes, the enrichment of nutrients such as nitrogen and phosphorus from water replenishment and non-point source inputs can easily lead to the proliferation and growth of algae, resulting in algal blooms. This causes water quality deterioration, with reduced transparency, a greenish color, and even an unpleasant odor. In addition, the enrichment of organic matter in the water can deplete dissolved oxygen, leading to oxygen deficiency and the proliferation of anaerobic microorganisms, causing the water to turn black and smelly, and resulting in the death of aquatic organisms.

[0003] Current algae control measures include: 1. Physical methods For water bodies containing a large amount of cyanobacteria, frequent and large-scale replacement with fresh water can dilute the concentration of cyanobacteria and the concentration of toxins secreted by cyanobacteria, promote the growth of other algae and maintain the dynamic balance of the entire ecosystem, and can also introduce other algae, reducing the population dominance of cyanobacteria.

[0004] Replacing the water with fresh water is a commonly used method for controlling algae in landscape water bodies, but it cannot fundamentally solve the problem of cyanobacterial blooms. Replacing the water with fresh water can temporarily dilute the concentration of cyanobacteria and nutrients in the water, alleviating the harm and negative impacts of the blooms. However, it cannot fundamentally change the ecological community structure formed by the cyanobacterial bloom, and this relief is relatively short-term, temporary, and very limited. For early-stage cyanobacterial blooms, replacing the water with fresh water can have a certain effect.

[0005] 2. Chemical methods Algae are killed by adding chemical algaecides such as copper sulfate, herbicides, bleaching powder, and chlorine dioxide. However, the addition of chemical algaecides poses a significant ecological risk as they are toxic to aquatic life.

[0006] Alternatively, algae can be removed by adding flocculants in conjunction with mechanical separation, but this method is more expensive.

[0007] 3. Biological and ecological methods By utilizing the food chain, the initial goal of controlling cyanobacteria can be achieved by stocking filter-feeding fish in water bodies. Cyanobacteria are excellent natural food for filter-feeding fish such as silver carp and bighead carp. To form a healthy food chain, suitable fish species include silver carp, bighead carp, and crucian carp.

[0008] Using aquatic plants to control algae, such as duckweed, not only absorbs nutrients like nitrogen and phosphorus and organic matter from the water, reducing the risk of algal blooms, but also, through its buoyancy, floats on the surface with cyanobacteria, covering the accumulated algal particles and hindering their growth, indirectly promoting the growth of other algae. Additionally, selectively cultivating and applying specific bacteria, fungi, and algae allows for the rapid and large-scale absorption of nitrogen and phosphorus from the water through the metabolism and reproduction of these microorganisms and algae, thereby inhibiting the growth of other algae and achieving the goal of controlling algae with algae. Biological ecological methods mainly involve controlling algae feeding by aquatic animals, allelopathic inhibition by aquatic plants, and competition for nutrients by specific microorganisms and algae to suppress cyanobacterial growth. Summary of the Invention

[0009] The purpose of this invention is to provide a three-dimensional photovoltaic and ecological coupled algae control system and method, which constructs an energy-free, low-maintenance and sustainable enhanced ecological algae control system and water purification method in a water body. It utilizes photovoltaic energy coupled with integrated ecological algae control measures for algae control and water purification, and is a green, low-carbon and sustainable water purification method.

[0010] To solve the above-mentioned technical problems, the present invention provides a three-dimensional photovoltaic and ecological coupled algae control system, including a water tank, a pump system, an algae circulation interception and enrichment system, and a water circulation pipeline system; The pump system includes an air compressor; The air compressor is connected to the dissolved air pump system and the air lift pump, respectively. The water tank is installed in the water body, and an air lift pump lifting pipe is installed inside the water tank. The bottom of the air lift pump lifting pipe extends into the water tank, the top extends out of the water tank, and air lift water flow guide pipes are installed around it. The air lift pump is equipped with an air lift pump compressed air release device inside the air lift pump riser pipe, and the air lift pump compressed air release device is connected to the air lift pump through the air lift pump compressed air pipeline. The bottom of the water tank is equipped with a micro-nano bubble end release device, which is connected to the dissolved air pump system. An air flotation algae residue collector is installed inside the water tank. The algal cycle interception and enrichment system includes an inner interception system and an outer interception system; The inner layer interception system includes an algae floc air flotation aggregation interception net, an interception net counterweight pipe, and a modular floating wetland; one end of the algae floc air flotation aggregation interception net is fixedly connected to the side wall of the water tank, and the other end is connected to the modular floating wetland, which is placed on the water surface around the water tank; the interception net counterweight pipe is installed in the middle of the algae floc air flotation aggregation interception net. The outer interception system is located outside the inner interception system; The outer interception system includes a debris barrier and a biological carrier placed in the outer interception zone; the debris barrier is installed around the water tank, with the top of the debris barrier installed on the water surface and the bottom of the debris barrier installed on the water bottom, and a dense debris-blocking net is installed on the debris barrier. The water circulation pipeline system includes a surface water intake pipe and a bottom water intake pipe; The surface water outlet of the surface water intake pipe is connected to the bottom of the water tank, and the surface water inlet is located near the water surface. The bottom water outlet of the bottom water intake pipe is connected to the bottom of the air-lift water flow guide pipe, and the bottom water inlet is located at the location where the rainwater inlet converges or the pollution input area.

[0011] Preferably, the air-lift pump lifting pipe is provided with a water overflow groove, which is located below the air-lift water flow guide pipe and covers the opening of the water tank.

[0012] Preferably, the air compressor is also connected to a pneumatic diaphragm pump; The air-floating algae residue collector is connected to the air-floating algae residue shoreline discharge pipe via a pneumatic diaphragm pump.

[0013] Preferably, a gate valve is installed at the bottom water outlet of the bottom water intake pipe; The gate is connected to a float via a gate lifting rope, and the float floats on the water surface; The surface water inlet of the surface water intake pipe is equipped with a surface water scum screen.

[0014] Preferably, both the surface water intake pipe and the bottom water intake pipe are fixed to the bottom of the water using pipe supports.

[0015] Preferably, the end of the surface water intake pipe near the surface water inlet is a retractable and adjustable hose; The telescopic adjustable hose is fixed by steel pipe fixing piles.

[0016] Preferably, both the surface water intake pipe and the bottom water intake pipe are equipped with flocculant or algaecide addition pipes.

[0017] Preferably, it also includes a photovoltaic power generation and energy storage system; The photovoltaic power generation and energy storage system includes solar photovoltaic modules, photovoltaic batteries, photovoltaic panel support frames, photovoltaic power generation system and equipment control boxes, and floating photovoltaic panels on the water surface; The photovoltaic panels on the water surface are mounted on floats around the water tank. The solar photovoltaic modules are mounted on the floating photovoltaic panels on the water surface via photovoltaic panel support frames. The solar photovoltaic module is connected to the photovoltaic battery; The solar photovoltaic modules and photovoltaic batteries are both connected to the photovoltaic power generation system and equipment control box via signal connection. The solar photovoltaic modules and photovoltaic batteries are powered by the air compressor, dissolved air pump system, air lift pump and pneumatic diaphragm pump, respectively. Preferably, the floating pontoon of the photovoltaic panel is located above the algae floc air flotation and interception net.

[0018] This invention also provides a method for controlling algae using a three-dimensional photovoltaic and ecological coupled algae control system, comprising the following steps: During the day and at night, surface algae water and bottom algae water are extracted through surface water intake pipe and bottom water intake pipe, respectively, as liquids that need to be purified. The liquid requiring purification is drawn into a water tank and rises into the lift pipe of the air-lift pump; The air lift pump injects compressed air into the liquid to be purified through the compressed air release device to mix it, thereby reducing its density and creating a pressure difference. The liquid to be purified in the air lift pump lift pipe is forced out through the air lift water flow guide pipe and falls into the cyanobacteria flotation interception zone near the water tank for enrichment.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: The ecological-photovoltaic coupled algae control system and method invented this time are characterized by zero energy consumption and sustainability. The photovoltaic system drives the air compressor, and the compressed air drives the airlift pump, dissolved air pump, and pneumatic diaphragm pump to achieve the enrichment and removal of cyanobacteria in the water. Attached Figure Description

[0020] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] Figure 1 This is a flowchart illustrating the system operation process of the present invention. Figure 2 This is a system composition diagram of the present invention.

[0022] in: 1-Solar photovoltaic module; 2-Photovoltaic battery; 3-Photovoltaic panel support frame; 4-Photovoltaic power generation system and equipment control box; 5-Floating photovoltaic panel float; 6-Bottom water intake pipe; 7-Surface algae-rich water intake pipe; 8-Surface water inlet; 9-Extendable adjustable hose; 10-Steel pipe fixing pile; 11-Water intake pipe fixing frame; 12-Water tank; 13-Air lift pump lifting pipe; 14-Air lift water flow guide pipe; 15-Outlet overflow trough; 16-Algae floc air flotation aggregation and interception net; 17-Interception net counterweight Pipe; 18-Air compressor; 19-Dissolved air pump system; 20-Air lift pump compressed air release device; 21-Micro-nano bubble end release device; 22-Air lift pump compressed air pipeline; 23-Air flotation algae residue collector; 24-Air flotation algae residue extraction and degassing diaphragm pump; 25-Air flotation algae residue shore discharge pipe; 26-Flocculant or algaecide dosing pipe; 27-Modular floating wetland; 28-Pollution barrier; 29-Vertical pollution barrier net; 30-Biological carrier; 31-Insert gate; 32-Gate lifting rope; 33-Float ball. Detailed Implementation

[0023] Numerous specific details are set forth in the following description to provide a full understanding of the invention. However, the invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0024] The terminology used in one or more embodiments of this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the one or more embodiments of this specification. The singular forms “a,” “described,” and “the” as used in one or more embodiments of this specification and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in one or more embodiments of this specification refers to and includes any or all possible combinations of one or more associated listed items.

[0025] It should be understood that although the terms first, second, etc., may be used to describe various information in one or more embodiments of this specification, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first may also be referred to as second without departing from the scope of one or more embodiments of this specification, and similarly, second may also be referred to as first. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to a determination."

[0026] The present invention will now be described in further detail with reference to the accompanying drawings: To better illustrate the technical effects of the present invention, the present invention provides the following specific embodiments to illustrate the above technical process: Example 1: A three-dimensional photovoltaic and ecological coupled algae control system, mainly composed of four parts: (1) Photovoltaic power generation and energy storage system: The system consists of solar photovoltaic modules 1, photovoltaic batteries 2, photovoltaic panel support frame 3, photovoltaic power generation system and equipment control box 4, and water surface photovoltaic panel float 5. The selected power and scale of the photovoltaic power generation system are determined based on the total amount of water to be treated, water quality, and designed water circulation cycle.

[0027] (2) Pump system: The system consists of an air compressor 18, a dissolved air pump system 19, an air lift pump, a pneumatic diaphragm pump 24, and an integrated control system. The air compressor 18 and the dissolved air pump system 19 are driven by the electrical energy generated by the solar photovoltaic module 1 or stored in the photovoltaic battery 2, which is boosted to 220V by the inverter.

[0028] Air compressor 18: The compressed air it produces provides an air source for the air lift pump riser 13, dissolved air pump system 19, and pneumatic diaphragm pump 24.

[0029] Air lift pump: Water tank 12 is installed in the water body with its top opening above the water surface; air lift pump lift pipe 13 is installed inside water tank 12; air lift pump compressed air release device 20 generates air bubbles in air lift pump lift pipe 13, which mix with the liquid to be purified (bottom water body and surface algae water, etc.). The density of the mixed liquid is much lower than that of the liquid in the bottom water body intake pipe 6 and the surface algae-rich water intake pipe 7. The resulting pressure difference forces the fluid in the pipe into air lift pump lift pipe 13 and upward flow. It is discharged through air lift water flow guide pipe 14 and falls into water overflow trough 15. Water overflow trough 15 extends outward for a certain length, and the fluid overflows to its surroundings and falls into the blue-green algae flotation interception zone for enrichment.

[0030] Dissolved air pump system 19: The dissolved air pump system 19 mixes and pressurizes compressed air with water, then releases it through the micro-nano bubble end release device 21 to generate microbubbles with a diameter of less than 50μm. This promotes the floating and aggregation of cyanobacteria flocs, which are then collected and removed by the air-floating algae residue collector 23. The air-floating algae residue collector 23 is installed below the water surface and its position is adjustable. The air-floating algae residue collector 23 can use an existing cyanobacteria collector. The inlet of the air-floating algae residue collector 23 is slightly lower than the liquid surface to ensure that most of the cyanobacteria flocs can flow in and be discharged by the pneumatic diaphragm pump 24; this is similar to the principle of skimming oil when eating hot pot or removing blood foam when cooking ribs.

[0031] Pneumatic diaphragm pump 24: This pump is driven by compressed air only. Its main function is to discharge the air-floating algae residue collected by the air-floating algae residue collector 23 through the pneumatic diaphragm pump 24 and the air-floating algae residue shore discharge pipe 25 to the shore or boat collector, and then carry out harmless treatment in a unified manner.

[0032] (3) Algal circulation interception and enrichment system: The system consists of two layers, an inner layer and an outer layer. The inner layer mainly intercepts most of the flocculent algal clusters and algae with relatively large particle sizes; the outer layer mainly removes fine particles and algal cells that pass through the inner layer's interception net.

[0033] The inner interception system mainly consists of an algal floc air flotation and aggregation interception net 16, an interception net counterweight pipe 17, and a modular floating wetland 27. The interception net is a large net sewn from non-woven fabric. The part above water is connected to the modular floating wetland 27 to generate an upward pulling force, while the part below water is connected by the interception net counterweight pipe 17 to generate a downward gravity force, ensuring that there is sufficient interception space inside the interception net.

[0034] The outer interception system mainly consists of a debris barrier 28 (with a dense debris barrier net 29) and a biological carrier 30 placed within the outer interception zone. This carrier serves two purposes: firstly, it adsorbs and intercepts fine particulate matter and algal cells; secondly, it provides a feeding ground for aquatic animals, removing them through the feeding processes of silver carp, bighead carp, freshwater mussels, snails, shrimp, and other aquatic animals raised within the area. Additionally, algal cells floating in the water are removed by filter-feeding aquatic animals such as silver carp, bighead carp, and freshwater mussels.

[0035] (4) Water circulation pipeline system: The layout of the pipeline system is mainly determined according to the planar layout of the water body. The surface water intake pipe 7 is mainly set in the downwind position where the water body is relatively closed and algae are easy to accumulate; the bottom water intake pipe 6 is mainly set in the location where the rainwater inlet or pollution input area is located. The sediment pollutants input by rainwater or makeup water are pumped to the system for treatment through the circulation and purification of bottom water. The intake pipe can be selected from double-wall corrugated pipe, U-PVC pipe and PE pipe, etc. The intake pipe is fixed by the pipe rack 11. Pine wood piles or steel pipe piles can be used as pipe racks to fix the pipes and prevent them from floating or misaligning.

[0036] Surface water intake pipe 7 primarily extracts algae-rich surface water. Its surface water inlet 8 is equipped with a surface water scum screen to intercept large debris such as fallen leaves, preventing pipe blockage. A retractable flexible hose 9 is installed in the middle of surface water intake pipe 7 to adjust the position of the surface water intake. The surface water intake pipe, scum screen, and retractable flexible hose are secured by steel pipe fixing piles 10 to ensure the intake is positioned above the water surface. During the daytime operation of the surface water intake pipe, the gate plate of the gate valve 31 at the bottom water inlet of the bottom water intake pipe 6 is lowered to close the bottom water inlet. At night, when the bottom water intake pipe 6 is operating, the gate valve lifting rope 32, pulled by the float ball 33, is raised to lift the gate valve 31, opening the water inlet. Simultaneously, the surface water scum screen is completely wrapped with a plastic bag to prevent surface water and air from entering and affecting the bottom water extraction efficiency.

[0037] In addition, to ensure the algae control effect, a flocculant or algaecide addition pipe 26 is installed on the water intake pipe. Targeted flocculants and algaecides are added according to the algae concentration and water quality to meet the water purification requirements.

[0038] This invention mainly achieves algae control and water purification through comprehensive technical measures, such as destroying the suitable growth conditions for cyanobacteria, enhancing the feeding of aquatic animals, and reducing nutrients such as nitrogen and phosphorus.

[0039] The suitable growth conditions for cyanobacteria are: cyanobacterial cells + light + temperature + a relatively static environment.

[0040] This invention is based on the phototaxis of cyanobacteria, which rise during the day and sink at night. During the day, a lift pump is used to pump water with a high concentration of algae from the surface to a shaded area to inhibit its photosynthesis. At night, the lift pump is used to pump the cyanobacteria that have sunk to the bottom and are consuming dissolved oxygen at the bottom back to the surface, thereby increasing the redox potential at the bottom and promoting the aerobic metabolism of pollutants in the sediment.

[0041] By circulating and flotating the algae-rich water, algal cells are trapped in the algae trapping and enrichment zone. Most particulate matter and algal cells are collected by flotation and then discharged to shore collectors for centralized harmless treatment. The remaining small algal cells, trapped by the trapping net, enter the outer ecological algae control zone, where they are intercepted by biological carriers (artificial algae beds) and removed by aquatic animals such as silver carp, bighead carp, shrimp, clams, and snails.

[0042] In addition, in cases of severe cyanobacterial blooms or low water transparency, targeted flocculants or algaecides can be added to enhance the system's flotation and interception purification effects, rapidly improving water transparency and water quality.

[0043] The system operation process of this invention includes the following steps: (1) During the daytime, cyanobacteria float to the surface of the water body to carry out photosynthesis. The surface water intake port 8 of the surface water intake pipe 7, the connecting pipeline and the air lift pump system operate to pump the surface algae water to the cyanobacteria interception area (the area covered by the algae floc air flotation and interception net 16). The water head difference between the air lift head and the water surface is used as the driving force to enrich the cyanobacteria cells through the interception net, so as to realize the water body circulation filtration and purification between the water intake port and the water intercepted by cyanobacteria.

[0044] The process of extracting surface algae-infused water is as follows: Surface algae water enters the tank 12 through the surface water inlet 8 and the surface algae-rich water intake pipe 7 and rises. Some of the surface algae water enters the air lift pump riser pipe 13 and overflows the air lift pump compressed air releaser 20. Then, compressed air is injected into the surface algae water in the air lift pump riser pipe 13 through the air lift pump compressed air releaser 20. After a large number of bubbles are released by the compressed air releaser, the liquid density in the air lift pump riser pipe 13 decreases, creating a pressure difference between the surface water level and the low-density water in the air lift pump riser pipe 13. This causes the low-density gas-liquid mixture in the air lift pump riser pipe 13 to be forced out through the air lift water flow guide pipe 14, thereby continuously flowing surface water into 13 and achieving continuous inflow of surface water.

[0045] (2) At night, the bottom water intake pipe 6, the connecting pipe and the air lift pump system operate to pump the bottom algae water to the cyanobacteria interception area. The water head difference between the air lift head and the water surface is used as the driving force. The cyanobacteria cells are enriched by the interception net, so as to realize the water circulation filtration and purification between the water intake and the water intercepted by the cyanobacteria.

[0046] The process of extracting algae water from the bottom layer is similar to that from the surface layer.

[0047] (3) The airlift pump system is driven by a compressed air pump connected to the photovoltaic power generation system. The algal cells agglomerated by the flocculant are dispersed by mixing with the fine air bubbles of the airlift pump, resulting in air flotation. The algal cells gather on the surface of the water in the cyanobacteria interception zone. Some of the small algal cells pass through the interception mesh and enter the biomanipulation restriction zone, where they are consumed and removed by the aquatic animals raised in that area.

[0048] (4) Photovoltaic panels are erected above the cyanobacteria trapping zone to block the sunlight. This can inhibit the photosynthesis of cyanobacteria in the trapping zone, thereby inhibiting the activity and proliferation rate of cyanobacteria.

[0049] (5) After the cyanobacteria interception zone has been in operation for a period of time, a large number of dead cyanobacteria cells are accumulated. They are removed by regular manual dredging or by using a solar submersible pump to discharge them to a bag filter on the shore for algae-water separation and removal.

[0050] The ecological-photovoltaic coupled algae control system and method invented this time are characterized by zero energy consumption and sustainability. The photovoltaic system drives the air compressor, and the compressed air drives the airlift pump, dissolved air pump, and pneumatic diaphragm pump to achieve the enrichment and removal of cyanobacteria in the water.

[0051] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions within the technical scope disclosed in the present invention should be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A three-dimensional photovoltaic and ecologically coupled algae control system, characterized in that: Includes a water tank (12), a pump system, an algae circulation interception and enrichment system, and a water circulation pipeline system; The pump system includes an air compressor (18); The air compressor (18) is connected to the dissolved air pump system (19) and the air lift pump respectively; The water tank (12) is installed in the water body. An air lift pump lifting pipe (13) is installed inside the water tank (12). The bottom of the air lift pump lifting pipe (13) extends into the water tank (12), the top extends out of the water tank (12), and an air lift water flow guide pipe (14) is installed around it. An air-lift pump compressed air release device (20) is installed inside the air-lift pump lift pipe (13), and the air-lift pump compressed air release device (20) is connected to the air-lift pump through the air-lift pump compressed air pipeline (22). The bottom of the water tank (12) is equipped with a micro-nano bubble end release device (21), which is connected to the dissolved air pump system (19). The water tank (12) is equipped with an air flotation algae residue collector (23). The algal cycle interception and enrichment system includes an inner interception system and an outer interception system; The inner interception system includes an algal floc air flotation agglomeration interception net (16), an interception net counterweight pipe (17), and a modular floating wetland (27); one end of the algal floc air flotation agglomeration interception net (16) is fixedly connected to the side wall of the water tank (12), and the other end is connected to the modular floating wetland (27), which is placed on the water surface around the water tank (12); the interception net counterweight pipe (17) is installed in the middle of the algal floc air flotation agglomeration interception net (16); The outer interception system is located outside the inner interception system; The outer interception system includes a debris screen (28) and a biological carrier (30) set in the outer interception area; the debris screen (28) is installed around the water tank (12), the top of the debris screen (28) is installed on the water surface, the bottom of the debris screen (28) is installed on the bottom of the water, and a debris screen mesh (29) is installed on the debris screen (28). The water circulation pipeline system includes a surface water intake pipe (7) and a bottom water intake pipe (6). The surface water outlet of the surface water intake pipe (7) is connected to the bottom of the water tank (12), and the surface water inlet (8) is located near the water surface; The bottom water outlet of the bottom water intake pipe (6) is connected to the bottom of the air-lift water flow guide pipe (14), and the bottom water inlet is located at the location of the rainwater inlet or the pollution input area.

2. The three-dimensional photovoltaic and ecologically coupled algae control system according to claim 1, characterized in that: The air lift pump lifting pipe (13) is fitted with a water overflow trough (15), which is located below the air lift water flow guide pipe (14) and covers the opening of the water tank (12).

3. The three-dimensional photovoltaic and ecological coupling algae control system according to claim 2, characterized in that: The air compressor (18) is also connected to a pneumatic diaphragm pump (24); The air-floating algae residue collector (23) is connected to the air-floating algae residue shore pipe (25) via a pneumatic diaphragm pump (24).

4. The three-dimensional photovoltaic and ecologically coupled algae control system according to claim 3, characterized in that: The bottom water outlet of the bottom water intake pipe (6) is equipped with a gate valve (31). The gate (31) is connected to the float (33) via the gate lifting rope (32), and the float (33) floats on the water surface; The surface water inlet (8) of the surface water intake pipe (7) is equipped with a surface water scum grid.

5. The three-dimensional photovoltaic and ecologically coupled algae control system according to claim 4, characterized in that: The surface water intake pipe (7) and the bottom water intake pipe (6) are both fixed to the bottom of the water by pipe racks (11).

6. The three-dimensional photovoltaic and ecological coupling algae control system according to claim 5, characterized in that: The end of the surface water intake pipe (7) near the surface water inlet (8) is a retractable adjustable hose (9). The telescopic adjusting hose (9) is fixed by a steel pipe fixing pile (10).

7. The three-dimensional photovoltaic and ecological coupling algae control system according to claim 6, characterized in that: Both the surface water intake pipe (7) and the bottom water intake pipe (6) are equipped with flocculant or algaecide addition pipes (26).

8. The three-dimensional photovoltaic and ecologically coupled algae control system according to claim 7, characterized in that: It also includes photovoltaic power generation and energy storage systems; The photovoltaic power generation and energy storage system includes solar photovoltaic modules (1), photovoltaic batteries (2), photovoltaic panel support frame (3), photovoltaic power generation system and equipment control box (4), and water surface photovoltaic panel float (5). The photovoltaic panel floats (5) are installed around the water tank (12); The solar photovoltaic module (1) is mounted on the photovoltaic panel float (5) on the water surface via a photovoltaic panel support frame (3); The solar photovoltaic module (1) is connected to the photovoltaic battery (2); The solar photovoltaic module (1) and the photovoltaic battery (2) are both connected to the photovoltaic power generation system and equipment control box (4) via signal connection. The solar photovoltaic module (1) and photovoltaic battery (2) are respectively powered by the air compressor (18), dissolved air pump system (19), air lift pump and pneumatic diaphragm pump (24).

9. The three-dimensional photovoltaic and ecologically coupled algae control system according to claim 8, characterized in that: The floating pontoon (5) of the photovoltaic panel is located above the algae floc air flotation and interception net (16).

10. A method for controlling algae using a three-dimensional photovoltaic and ecologically coupled algae control system, wherein the algae control system is the three-dimensional photovoltaic and ecologically coupled algae control system as described in any one of claims 1-9, characterized in that, Includes the following steps: During the day and at night, surface algae water and bottom algae water are extracted through surface water intake pipe (7) and bottom water intake pipe (6) respectively as liquids to be purified; The liquid to be purified is drawn into the water tank (12) and rises into the air lift pump riser pipe (13); The air lift pump injects compressed air into the liquid to be purified through the air lift pump compressed air release device (20) to mix it, thereby reducing its density and generating a pressure difference. The liquid to be purified in the air lift pump lift pipe (13) is forced out through the air lift water flow guide pipe (14) and falls into the cyanobacteria flotation interception zone near the water tank (12) for enrichment.

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