A phosphorus-rich aquaculture tail water treatment method and system

Abstract

The present invention belongs to the technical field of aquaculture tail water treatment, and specifically relates to a method and system for treating phosphorus-rich aquaculture tail water, including a tail water treatment pool. An additive pipe is provided on the inner bottom wall of the tail water treatment pool. One end of the additive pipe away from the tail water treatment pool is provided with a pump. An extension pipe is slidably installed on the inner wall of the additive pipe. A buoyancy sleeve is fixedly installed on the surface of the extension pipe. A first spring is fixedly installed on the inner wall of the extension pipe. The other end of the first spring is fixedly installed with a sealing plate, so that the sealing plate stretches the first spring and makes the extension pipe communicate with the additive pipe, preventing sundries or rainwater from entering the additive pipe along the extension pipe. When the pump is turned on, the pump sprays the flocculant into the tail water treatment pool along the additive pipe and the extension pipe, so that the aquaculture tail water and the flocculant are fully mixed, causing the phosphorus in the aquaculture tail water to flocculate and settle, preventing a large amount of phosphorus in the aquaculture tail water from being discharged into the nearby water area, resulting in eutrophication of the nearby water area.

Description

Technical Field

[0001] The present invention belongs to the technical field of aquaculture wastewater treatment, and specifically relates to a method and system for treating phosphorus-rich aquaculture wastewater. Background Art

[0002] The pollutants in aquaculture water bodies mainly include: organic matter, ammonia nitrogen, nitrite, nitrate, phosphorus, etc. Its main characteristics are: large water volume, fewer types of pollutants and small content changes, etc. The pollutants are mainly organic matter and nutrient salts such as nitrogen and phosphorus. Most aquaculture wastewater belongs to slightly polluted water, with a relatively low pollution load and is relatively easy to treat. Some aquaculture wastewater does not even require physicochemical treatment and can directly meet the discharge requirements by using biological methods.

[0003] A patent of Chinese Patent Application CN112897807A discloses an aquaculture wastewater treatment system. The key points of its technical solution are: including a preliminary sedimentation area, an enhanced sedimentation area, a biological purification area, and an effluent storage area; the preliminary sedimentation area is used to collect aquaculture wastewater discharged from seawater ponds; the enhanced sedimentation area includes a reservoir, a water isolation dike, and a filtration dam. The water isolation dike divides the reservoir into multiple sedimentation ponds arranged side by side in the left-right direction. The sedimentation pond on the left is used to collect the aquaculture wastewater after preliminary sedimentation. Adjacent sedimentation ponds are connected through a filtration dam, and the sedimentation pond on the right is connected to the biological purification area through a filtration dam; the biological purification area includes an animal breeding purification pond and a first plant purification wetland. The animal breeding purification pond is connected to the sedimentation pond on the right through a filtration dam, and the animal breeding purification pond is connected to the effluent storage area through the first plant purification wetland. When treating aquaculture wastewater, the structure and function of the seawater pond do not need to be changed. The process is advanced, the technology is reliable, the economy is reasonable, the construction cost and operation cost are low, and the management and maintenance are convenient.

[0004] In view of the above and existing related technologies, the inventor believes that the following defects often exist: the phosphorus content in aquaculture feed is very high (the phosphorus in water mainly comes from feed residues, and phosphorus is an essential nutrient component for the fish scales and bones), but only a small part of the phosphorus can be absorbed by aquaculture products, and most of the phosphorus is discharged into the nearby waters, resulting in eutrophication.

[0005] Therefore, the present invention provides a method and system for treating phosphorus-rich aquaculture wastewater. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: A phosphorus-rich aquaculture tail water treatment system described in the present invention includes a tail water treatment tank. An additive pipe is provided on the inner bottom wall of the tail water treatment tank. A pump is provided at one end of the additive pipe away from the tail water treatment tank. An extension pipe is slidably installed on the inner wall of the additive pipe. A buoyancy sleeve is fixedly installed on the surface of the extension pipe. A first spring is fixedly installed on the inner wall of the extension pipe. The other end of the first spring is fixedly installed with a sealing plate. A group of stop rods are fixedly installed on the inner wall of the additive pipe. When treating aquaculture tail water, the aquaculture tail water is discharged into the tail water treatment tank. As the water level of the aquaculture tail water gradually rises, the buoyancy of the aquaculture tail water cooperates with the buoyancy sleeve to drive the movement of the extension pipe. When the aquaculture tail water reaches the designated water level in the tail water treatment tank, the stop rod will hinder the movement of the sealing plate, causing the sealing plate to stretch the first spring and making the extension pipe communicate with the additive pipe, preventing sundries or rainwater from entering the additive pipe along the extension pipe. The pump is turned on, and the pump sprays the flocculant into the tail water treatment tank along the additive pipe and the extension pipe, so that the aquaculture tail water and the flocculant are fully mixed, causing the phosphorus in the aquaculture tail water to flocculate and settle, preventing a large amount of phosphorus in the aquaculture tail water from being discharged into the nearby water area and causing eutrophication of the nearby water area.

[0008] Preferably, a special-shaped spray pipe is rotatably installed at one end of the extension pipe away from the additive pipe. The special-shaped spray pipe is arranged in a Z shape. After the flocculant passes through the spray pipe, the flocculant will fill into the special-shaped spray pipe and be sprayed out along the two nozzles of the special-shaped spray pipe. The force generated when the special-shaped spray pipe sprays the flocculant drives the rotation of the special-shaped spray pipe, which can expand the spraying range of the flocculant, improve the spreading efficiency of the flocculant, and the rotating special-shaped spray pipe will stir the aquaculture tail water, enabling the two to be fully mixed.

[0009] Preferably, two groups of elastic pieces are fixedly installed on the surface of the special-shaped spray pipe. The other end of the elastic piece is fixedly installed with a diffusion ball. The diffusion ball is slidably and sealingly connected to the inner wall of the special-shaped spray pipe. When the special-shaped spray pipe sprays the flocculant, it will drive the movement of the diffusion ball and stretch the elastic piece. The spherical diffusion ball can further improve the spraying range of the flocculant. And when the spraying of the flocculant is completed, the elastic piece will drive the diffusion ball to reset and block the nozzle of the special-shaped spray pipe, which can prevent sediment from entering the special-shaped spray pipe and causing blockage, avoiding failures.

[0010] Preferably, a protective strip is fixedly installed on the surface of the extension pipe. There are multiple groups of protective strips and they are circumferentially distributed evenly. The multiple groups of protective strips can prevent the aquatic plants in the aquaculture tail water from winding around the surface of the special-shaped spray pipe, resulting in the inability of the special-shaped spray pipe to rotate and affecting the spraying of the flocculant.

[0011] Preferably, a plurality of support plates are fixedly installed on the inner bottom wall of the tailwater treatment tank, a movable tube is fixedly installed on the surface of the support plate, a movable rod is slidably installed on the inner wall of the movable tube, a first wave plate is fixedly installed on the end of the movable rod close to the extension tube, a second wave plate is fixedly installed on the end of the movable rod away from the first wave plate, a second spring is fixedly installed on the inner wall of the movable tube, the other end of the second spring is fixedly connected to the surface of the movable rod, and an air supply mechanism is arranged inside the support plate; the air supply mechanism allows gas to enter the movable tube and drive the movable rod to move, The movable rod causes the wave plate one and the wave plate two to move, and the movable rod stretches the spring two when it moves. The wave plate one and the wave plate two can stir the water flow when they move, further promoting the mixing of the flocculant and the phosphorus in the aquaculture tail water. Floccules will adhere to the surface of the protective strip, and the wave plate one will collide with the protective strip during the movement to shake off the floccules attached to the surface of the protective strip, so as to avoid the floccules adhering to the surface of the protective strip and being difficult to clean after drying after the aquaculture tail water is discharged. After the air supply mechanism is closed, the spring drives the movable rod to reset, and when the movable rod is reset, the wave plate one and the wave plate two will stir the water flow again.

[0012] Preferably, a fixing plate is fixedly mounted on the surface of the movable tube, an elastic block is fixedly mounted on the surface of the fixing plate, the elastic block is made of elastic material and has a hollow structure, a stop plate is fixedly mounted on the surface of the first wave plate, the protective strips all have a hollow structure and a connected ventilation box is fixedly mounted on one end away from the extension tube, a connecting pipe connected to the air box is fixedly mounted on the surface of the elastic block, a magnetic block 1 is slidably mounted on the inner wall of the protective strip, a magnetic block 2 is slidably mounted on the surface of the protective strip, the magnetic block 1 and the magnetic block 2 will attract each other, and a cutting knife is fixedly mounted on the surface of the second magnetic block, An elastic strip is fixedly installed on the surface of the magnetic block one, and the other end of the elastic strip is fixedly connected to the inner wall of the air box; when the spring two drives the movable rod to reset, the resistance plate on the surface of the wave plate squeezes the elastic block, and the gas in the elastic block enters the air box along the connecting pipe, and the gas will drive the magnetic block one to move in the protective strip. When the magnetic block one moves, it drives the magnetic block two to move, and when the magnetic block two moves, it drives the cutting knife to move, further scraping off the flocculants on the surface of the protective strip, and the cutting knife can cut off the water plants wrapped around the surface of the protective strip to prevent the water plants from affecting the diffusion of the flocculant. After the resistance plate leaves the surface of the elastic block, the elastic strip will drive the magnetic block one to reset.

[0013] Preferably, a filter is fixedly installed on the surface of the tailwater treatment pool, and a baffle is rotatably installed on the inner wall of the tailwater treatment pool; after the flocculant and the aquaculture tailwater have fully reacted, the baffle is opened, and the filter can block the flocs and impurities in the aquaculture tailwater, so that relatively pure water can be discharged, preventing the flocs and impurities from being discharged together and affecting the water quality.

[0014] Preferably, a limiting rod is fixedly installed in each filter hole of the filter screen. A dredging plate is slidably installed on the surface of the limiting rod. A third spring is fixedly installed on the surface of the dredging plate, and the other end of the third spring is fixedly connected to the surface of the limiting rod. The aquaculture tail water drives the dredging plate to move and stretch the third spring. After the third spring is stretched to a certain extent, the water will drain along the filter holes. When all the water is drained from the tail water treatment pool, the third spring drives the dredging plate to reset. When the dredging plate resets, it scrapes the inner wall of the filter holes to prevent impurities from blocking the filter holes and affecting the filtering effect of the filter screen.

[0015] A method for treating phosphorus-rich aquaculture tail water, which uses the above-mentioned phosphorus-rich aquaculture tail water treatment system, and the method includes the following steps:

[0016] S1: Discharge the aquaculture tail water into the tail water treatment pool. As the water level of the aquaculture tail water gradually rises, the buoyancy of the aquaculture tail water and the buoyancy sleeve cooperate to drive the extension pipe to move;

[0017] S2: When the aquaculture tail water reaches the specified water level in the tail water treatment pool, the stop rod will hinder the movement of the sealing plate, causing the sealing plate to stretch the first spring and connecting the extension pipe to the additive pipe;

[0018] S3: Turn on the pump. The pump sprays the flocculant (the flocculant is a phosphorus-removing flocculant) into the tail water treatment pool along the additive pipe and the extension pipe, so that the aquaculture tail water and the flocculant are fully mixed, causing the phosphorus in the aquaculture tail water to coagulate and settle (preventing a large amount of phosphorus in the aquaculture tail water from being discharged into the nearby water area, resulting in eutrophication of the nearby water area).

[0019] A method for treating phosphorus-rich aquaculture tail water, the method further includes the following steps:

[0020] S4: When the flocculant passes through the spray pipe, the flocculant will be filled into the special-shaped spray pipe and sprayed out along the two nozzles of the special-shaped spray pipe;

[0021] S5: The force generated when the special-shaped spray pipe sprays the flocculant drives the special-shaped spray pipe to rotate, expanding the spraying range of the flocculant. The rotating special-shaped spray pipe stirs the aquaculture tail water, enabling the two to be fully mixed.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. A method and system for treating phosphorus-rich aquaculture tail water according to the present invention. When treating aquaculture tail water, the aquaculture tail water is discharged into the tail water treatment pool. As the water level of the aquaculture tail water gradually rises, the buoyancy of the aquaculture tail water cooperates with the buoyancy sleeve to drive the extension pipe to move. When the aquaculture tail water reaches the specified water level in the tail water treatment pool, the stop bar will hinder the movement of the sealing plate, causing the sealing plate to stretch the spring and connect the extension pipe with the additive pipe, preventing debris or rainwater from entering the additive pipe along the extension pipe. Then, turn on the pump, and the pump sprays the flocculant into the tail water treatment pool along the additive pipe and the extension pipe, so that the aquaculture tail water and the flocculant are fully mixed, causing the phosphorus in the aquaculture tail water to coagulate and settle, preventing a large amount of phosphorus in the aquaculture tail water from being discharged into the nearby water area and causing eutrophication of the nearby water area.

[0024] 2. A method and system for treating phosphorus-rich aquaculture tail water according to the present invention. After the flocculant passes through the spray pipe, the flocculant will fill into the special-shaped spray pipe and spray out along the two nozzles of the special-shaped spray pipe. The force generated when the special-shaped spray pipe sprays the flocculant drives the special-shaped spray pipe to rotate, which can expand the spraying range of the flocculant, improve the spreading efficiency of the flocculant, and the rotating special-shaped spray pipe will stir the aquaculture tail water, enabling the two to be fully mixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] Figure 1 is the three-dimensional view of the whole of the present invention;

[0027] Figure 2 is the structural schematic diagram of the present invention;

[0028] Figure 3 is the structural schematic diagram of the elastic block in the present invention;

[0029] Figure 4 is the structural schematic diagram of the special-shaped spray pipe in the present invention;

[0030] Figure 5 is the structural schematic diagram of the second magnetic block in the present invention;

[0031] Figure 6 is the structural schematic diagram of the dredging plate in Embodiment 2;

[0032] Figure 7 is the method flow chart of the present invention.

[0033] In the figure: 1, tail water treatment tank; 2, additive pipe; 3, extension pipe; 4, buoyancy sleeve; 5, spring one; 6, sealing plate; 7, stop bar; 8, special-shaped nozzle; 9, diffusion ball; 10, elastic sheet; 11, protective strip; 12, support plate; 13, movable pipe; 14, spring two; 15, movable rod; 16, wave plate one; 17, wave plate two; 18, fixed plate; 19, elastic block; 20, connecting pipe; 21, air box; 22, magnet one; 23, magnet two; 24, cutting knife; 25, elastic bar; 26, filter screen; 27, baffle; 28, limit rod; 29, dredging plate; 30, spring three; 31, abutting plate. Specific implementation mode

[0034] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation modes.

[0035] Embodiment 1

[0036] As Figures 1 to 5 shown, a phosphorus-rich aquaculture tail water treatment system according to an embodiment of the present invention includes a tail water treatment tank 1. An additive pipe 2 is provided on the inner bottom wall of the tail water treatment tank 1. A pump is provided at one end of the additive pipe 2 away from the tail water treatment tank 1. An extension pipe 3 is slidably installed on the inner wall of the additive pipe 2. A buoyancy sleeve 4 is fixedly installed on the surface of the extension pipe 3. A spring one 5 is fixedly installed on the inner wall of the extension pipe 3. The other end of the spring one 5 is fixedly installed with a sealing plate 6. A group of stop bars 7 are fixedly installed on the inner wall of the additive pipe 2; when treating aquaculture tail water, the aquaculture tail water is discharged into the tail water treatment tank 1. As the water level of the aquaculture tail water gradually rises, the buoyancy of the aquaculture tail water cooperates with the buoyancy sleeve 4 to drive the movement of the extension pipe 3. When the aquaculture tail water reaches the specified water level in the tail water treatment tank 1, the stop bar 7 will prevent the movement of the sealing plate 6, causing the sealing plate 6 to stretch the spring one 5 and making the extension pipe 3 communicate with the additive pipe 2, preventing sundries or rainwater from entering the additive pipe 2 along the extension pipe 3. Turn on the pump, and the pump sprays the flocculant into the tail water treatment tank 1 along the additive pipe 2 and the extension pipe 3, so that the aquaculture tail water and the flocculant are fully mixed, causing the phosphorus in the aquaculture tail water to coagulate and settle, preventing a large amount of phosphorus in the aquaculture tail water from being discharged into the nearby water area and causing eutrophication of the nearby water area.

[0037] Among them, the end of the extension pipe 3 away from the additive pipe 2 is rotatably installed with a special-shaped nozzle 8, and the special-shaped nozzle 8 is arranged in a Z shape; after the flocculant passes through the nozzle, the flocculant will fill into the special-shaped nozzle 8 and spray out along the two nozzles of the special-shaped nozzle 8. The force when the special-shaped nozzle 8 sprays the flocculant drives the rotation of the special-shaped nozzle 8, which can expand the spraying range of the flocculant, improve the spreading efficiency of the flocculant, and the rotating special-shaped nozzle 8 will stir the aquaculture tail water, enabling the two to be fully mixed.

[0038] Among them, two groups of spring pieces 10 are fixedly installed on the surface of the special-shaped nozzle 8, and a diffusion ball 9 is fixedly installed on the other end of the spring piece 10. The diffusion ball 9 is slidably and sealedly connected to the inner wall of the special-shaped nozzle 8; when the special-shaped nozzle 8 sprays flocculant, the diffusion ball 9 will drive the movement of the spring piece 10 and stretch the spring piece 10. The spherical diffusion ball 9 can further increase the spraying range of the flocculant, and when the flocculant spraying is completed, the spring piece 10 will drive the diffusion ball 9 to reset and block the nozzle of the special-shaped nozzle 8, which can prevent sediment from entering the special-shaped nozzle 8 to cause blockage and avoid malfunction.

[0039] Among them, a protective strip 11 is fixedly installed on the surface of the extension tube 3, and the protective strip 11 has multiple groups and is evenly distributed around the circumference; multiple groups of protective strips 11 can prevent aquatic plants in the aquaculture tail water from being entangled on the surface of the special-shaped nozzle 8, causing the special-shaped nozzle 8 to be unable to rotate and affecting the spraying of the flocculant.

[0040] Among them, multiple groups of support plates 12 are fixedly installed on the inner bottom wall of the tailwater treatment tank 1, and a movable tube 13 is fixedly installed on the surface of the support plate 12. A movable rod 15 is slidably installed on the inner wall of the movable tube 13. A fluctuating plate 16 is fixedly installed on the end of the movable rod 15 close to the extension tube 3, and a fluctuating plate 2 17 is fixedly installed on the end of the movable rod 15 away from the fluctuating plate 16. A spring 2 14 is fixedly installed on the inner wall of the movable tube 13, and the other end of the spring 2 14 is fixedly connected to the surface of the movable rod 15. An air supply mechanism is arranged inside the support plate 12; the air supply mechanism allows gas to enter the movable tube 13 and drive the movable rod 15 to move. The movable rod 15 causes the wave plate 16 and the wave plate 2 17 to move. When the movable rod 15 moves, the spring 2 14 is stretched. When the wave plate 16 and the wave plate 2 17 move, the water flow can be stirred, further promoting the mixing of the flocculant and the phosphorus in the aquaculture tail water. Flocs will adhere to the surface of the protective strip 11, and the wave plate 1 16 will collide with the protective strip 11 during the movement to shake off the flocs attached to the surface of the protective strip 11, so as to avoid the flocs adhering to the surface of the protective strip 11 and being difficult to clean after drying after the aquaculture tail water is discharged. After the air supply mechanism is closed, the spring drives the movable rod 15 to reset. When the movable rod 15 is reset, the wave plate 1 16 and the wave plate 2 17 will stir the water flow again.

[0041] Among them, a fixing plate 18 is fixedly installed on the surface of the movable pipe 13, an elastic block 19 is fixedly installed on the surface of the fixing plate 18, the elastic block 19 is made of an elastic material and has a hollow structure, a pressing plate 31 is fixedly installed on the surface of the first wave plate 16, the protective strips 11 all have hollow structures and a connected ventilation box 21 is fixedly installed at one end away from the extension pipe 3, a connecting pipe 20 communicating with the air box 21 is fixedly installed on the surface of the elastic block 19, a first magnetic block 22 is slidably installed on the inner wall of each of the protective strips 11, a second magnetic block 23 is slidably installed on the surface of each of the protective strips 11, the first magnetic block 22 and the second magnetic block 23 will attract each other, a cutting knife 24 is fixedly installed on the surface of each of the second magnetic blocks 23, a spring strip 25 is fixedly installed on the surface of the first magnetic block 22, and the other end of the spring strip 25 is fixedly connected to the inner wall of the air box 21; when the second spring 14 drives the movable rod 15 to reset, the pressing plate 31 on the surface of the wave plate presses the elastic block 19, the gas in the elastic block 19 enters the air box 21 along the connecting pipe 20, and the gas drives the first magnetic block 22 to move in the protective strip 11. When the first magnetic block 22 moves, it drives the second magnetic block 23 to move, and when the second magnetic block 23 moves, it drives the cutting knife 24 to move, further scraping off the coagulated flocs on the surface of the protective strip 11 and the cutting knife 24 can cut off the waterweeds wound on the surface of the protective strip 11, preventing the waterweeds from affecting the diffusion of the flocculant. After the pressing plate 31 leaves the surface of the elastic block 19, the spring strip 25 drives the first magnetic block 22 to reset.

[0042] Among them, a filter screen 26 is fixedly installed on the surface of the tail water treatment tank 1, and a baffle 27 is rotatably installed on the inner wall of the tail water treatment tank 1; after the flocculant and the aquaculture tail water fully react, the baffle 27 is opened, and the filter screen 26 can block the coagulated flocs and impurities in the aquaculture tail water, so that relatively pure water is discharged, preventing the coagulated flocs and impurities from being discharged together and affecting the water quality.

[0043] Embodiment 2

[0044] As Figure 6 shown, compared with Embodiment 1, another implementation manner of the present invention is: a limiting rod 28 is fixedly installed in each filter hole of the filter screen 26, a dredging plate 29 is slidably installed on the surface of the limiting rod 28, a spring three 30 is fixedly installed on the surface of the dredging plate 29, and the other end of the spring three 30 is fixedly connected to the surface of the limiting rod 28; the aquaculture tail water drives the dredging plate 29 to move and stretch the spring three 30. After the spring three 30 is stretched to a certain extent, the water will drain along the filter holes. When all the water is drained from the tail water treatment tank 1, the spring three 30 drives the dredging plate 29 to reset, and when the dredging plate 29 resets, it scrapes the inner wall of the filter holes, preventing impurities from blocking the filter holes and affecting the filtering effect of the filter screen 26.

[0045] As Figure 7As shown, a method for treating phosphorus-rich aquaculture tail water, which uses the above phosphorus-rich aquaculture tail water treatment system, the method includes the following steps:

[0046] S1: Discharge the aquaculture tail water into the tail water treatment tank 1. As the water level of the aquaculture tail water gradually rises, the buoyancy of the aquaculture tail water cooperates with the buoyancy sleeve 4 to drive the extension pipe 3 to move.

[0047] S2: When the aquaculture tail water reaches the specified water level in the tail water treatment tank 1, the stop bar 7 will hinder the movement of the sealing plate 6, causing the sealing plate 6 to stretch the first spring 5 and making the extension pipe 3 communicate with the additive pipe 2.

[0048] S3: Turn on the pump. The pump sprays the flocculant (the flocculant is a phosphorus-removing flocculant) into the tail water treatment tank 1 along the additive pipe 2 and the extension pipe 3, so that the aquaculture tail water and the flocculant are fully mixed, causing the phosphorus in the aquaculture tail water to coagulate and settle (preventing a large amount of phosphorus in the aquaculture tail water from being discharged into the nearby water area, resulting in eutrophication of the nearby water area).

[0049] A method for treating phosphorus-rich aquaculture tail water, the method further includes the following steps:

[0050] S4: When the flocculant passes through the spray pipe, the flocculant will be filled into the special-shaped spray pipe 8 and sprayed out along the two nozzles of the special-shaped spray pipe 8.

[0051] S5: The force when the special-shaped spray pipe 8 sprays the flocculant drives the special-shaped spray pipe 8 to rotate, expanding the spraying range of the flocculant. The rotating special-shaped spray pipe 8 stirs the aquaculture tail water, enabling the two to be fully mixed.

[0052] Working principle: When treating aquaculture tail water, the aquaculture tail water is discharged into the tail water treatment tank 1. As the water level of the aquaculture tail water gradually rises, the buoyancy of the aquaculture tail water cooperates with the buoyancy sleeve 4 to drive the extension pipe 3 to move. When the aquaculture tail water reaches the specified water level in the tail water treatment tank 1, the stop bar 7 will hinder the movement of the sealing plate 6, causing the sealing plate 6 to stretch the first spring 5 and connect the extension pipe 3 with the additive pipe 2, preventing sundries or rainwater from entering the additive pipe 2 along the extension pipe 3. Turn on the pump, and the pump sprays the flocculant into the tail water treatment tank 1 along the additive pipe 2 and the extension pipe 3, so that the aquaculture tail water and the flocculant are fully mixed, causing the phosphorus in the aquaculture tail water to coagulate and settle, preventing a large amount of phosphorus in the aquaculture tail water from being discharged into the nearby water area, resulting in eutrophication of the nearby water area; after passing through the spray pipe, the flocculant will fill into the special-shaped spray pipe 8 and spray out along the two nozzles of the special-shaped spray pipe 8. The force when the special-shaped spray pipe 8 sprays the flocculant drives the special-shaped spray pipe 8 to rotate, which can expand the spraying range of the flocculant, improve the spreading efficiency of the flocculant, and the rotating special-shaped spray pipe 8 will stir the aquaculture tail water to make the two fully mixed; when the special-shaped spray pipe 8 sprays the flocculant, it will drive the diffusion ball 9 to move and stretch the elastic piece 10. The spherical diffusion ball 9 can further increase the spraying range of the flocculant. And when the spraying of the flocculant is over, the elastic piece 10 will drive the diffusion ball 9 to reset and block the nozzle of the special-shaped spray pipe 8, which can prevent sediment from entering the special-shaped spray pipe 8 and causing blockage, avoiding failures; multiple groups of protective strips 11 can prevent the aquatic plants in the aquaculture tail water from winding around the surface of the special-shaped spray pipe 8, resulting in the inability of the special-shaped spray pipe 8 to rotate and affecting the spraying of the flocculant; the air supply mechanism allows gas to enter the movable pipe 13 and drives the movable rod 15 to move. The movable rod 15 causes the first wave plate 16 to move and the second wave plate 17 to move. When the movable rod 15 moves, it stretches the second spring 14. When the first wave plate 16 and the second wave plate 17 move, they can stir the water flow, further promoting the mixing of the flocculant and the phosphorus in the aquaculture tail water. The surface of the protective strip 11 will adhere to coagulum, and during the movement of the first wave plate 16, it will collide with the protective strip 11 to shake off the coagulum attached to the surface of the protective strip 11, avoiding the difficulty of cleaning the coagulum attached to the surface of the protective strip 11 after drying when the aquaculture tail water is discharged. After the air supply mechanism is closed, the spring drives the movable rod 15 to reset. When the movable rod 15 resets, the first wave plate 16 and the second wave plate 17 will stir the water flow again; when the second spring 14 drives the movable rod 15 to reset, the abutting plate 31 on the surface of the wave plate squeezes the elastic block 19, and the gas in the elastic block 19 enters the air box 21 along the connecting pipe 20, and the gas drives the first magnet 22 to move in the protective strip 11. When the first magnet 22 moves, it drives the second magnet 23 to move. When the second magnet 23 moves, it drives the cutting knife 24 to move, further scraping off the coagulum on the surface of the protective strip 11 and the cutting knife 24 can cut off the aquatic plants winding around the surface of the protective strip 11 to prevent the aquatic plants from affecting the diffusion of the flocculant. After the abutting plate 31 leaves the surface of the elastic block 19, the elastic strip 25 will drive the first magnet 22 to reset;After the flocculant and the aquaculture tail water have fully reacted, the baffle 27 is opened. The filter screen 26 can block the flocs and impurities in the aquaculture tail water, allowing relatively pure water to be discharged, preventing the flocs and impurities from being discharged together and affecting the water quality. The aquaculture tail water drives the dredging plate 29 to move and stretch the third spring 30. After the third spring 30 is stretched to a certain extent, the water will drain along the filter holes. When all the water is discharged from the tail water treatment tank 1, the third spring 30 drives the dredging plate 29 to reset. When the dredging plate 29 resets, it scrapes the inner wall of the filter holes to prevent impurities from blocking the filter holes and affecting the filtering effect of the filter screen 26.

[0053] The above front, back, left, right, up, and down are all based on the Figure 1 description in the accompanying drawings of the specification. Taking the observer's perspective as the standard, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0054] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the protection scope of the present invention.

[0055] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A phosphorus-rich aquaculture tail water treatment system, Characterized in that: It includes a tail water treatment tank (1). An additive pipe (2) is arranged on the inner bottom wall of the tail water treatment tank (1). A pump is arranged at one end of the additive pipe (2) far away from the tail water treatment tank (1). An extension pipe (3) is slidably installed on the inner wall of the additive pipe (2). A buoyancy sleeve (4) is fixedly installed on the surface of the extension pipe (3). A first spring (5) is fixedly installed on the inner wall of the extension pipe (3). The other end of the first spring (5) is fixedly installed with a sealing plate (6). A group of stop rods (7) are fixedly installed on the inner wall of the additive pipe (2); A protective strip (11) is fixedly installed on the surface of the extension pipe (3). There are multiple groups of protective strips (11) and they are evenly distributed in a circular pattern; Multiple support plates (12) are fixedly installed on the inner bottom wall of the tail water treatment tank (1). A movable pipe (13) is fixedly installed on the surface of the support plate (12). A movable rod (15) is slidably installed on the inner wall of the movable pipe (13). A first wave plate (16) is fixedly installed at one end of the movable rod (15) close to the extension pipe (3). A second wave plate (17) is fixedly installed at the other end of the movable rod (15) far away from the first wave plate (16). A second spring (14) is fixedly installed on the inner wall of the movable pipe (13). The other end of the second spring (14) is fixedly connected to the surface of the movable rod (15). An air supply mechanism is arranged inside the support plate (12); A fixing plate (18) is fixedly installed on the surface of the movable pipe (13). An elastic block (19) is fixedly installed on the surface of the fixing plate (18). The elastic block (19) is made of an elastic material and has a hollow structure. A resisting plate (31) is fixedly installed on the surface of the first wave plate (16). The protective strips (11) all have a hollow structure and a connected ventilation box (21) is fixedly installed at one end far away from the extension pipe (3). A connecting pipe (20) communicating with the ventilation box (21) is fixedly installed on the surface of the elastic block (19). A first magnetic block (22) is slidably installed on the inner wall of each protective strip (11). A second magnetic block (23) is slidably installed on the surface of each protective strip (11). The first magnetic block (22) and the second magnetic block (23) will attract each other. A cutting knife (24) is fixedly installed on the surface of each second magnetic block (23). A spring strip (25) is fixedly installed on the surface of the first magnetic block (22). The other end of the spring strip (25) is fixedly connected to the inner wall of the ventilation box (21).

2. A phosphorus-rich aquaculture tail water treatment system according to claim 1, Characterized in that: The extension pipe (3) is rotatably installed with a special-shaped spray pipe (8) at one end far away from the additive pipe (2). The special-shaped spray pipe (8) is arranged in a Z shape.

3. A phosphorus-rich aquaculture tail water treatment system according to claim 2, Characterized in that: Two groups of elastic sheets (10) are fixedly installed on the surface of the special-shaped spray pipe (8). The other end of the elastic sheet (10) is fixedly installed with a diffusion ball (9). The diffusion ball (9) is slidably and sealedly connected to the inner wall of the special-shaped spray pipe (8).

4. A phosphorus-rich aquaculture tail water treatment system according to claim 3, Characterized in that: A filter screen (26) is fixedly installed on the surface of the tail water treatment tank (1). A baffle (27) is rotatably installed on the inner wall of the tail water treatment tank (1).

5. A phosphorus-rich aquaculture tail water treatment system according to claim 4, characterized in that: Limit rods (28) are fixedly installed in the filter holes of the filter screen (26), dredging plates (29) are slidably installed on the surfaces of the limit rods (28), a third spring (30) is fixedly installed on the surface of the dredging plate (29), and the other end of the third spring (30) is fixedly connected to the surface of the limit rod (28).

6. A method for treating phosphorus-rich aquaculture tail water, which uses the phosphorus-rich aquaculture tail water treatment system according to any one of claims 1-5, characterized in that: The method includes the following steps: S1: Discharge the aquaculture tail water into the tail water treatment tank (1). As the water level of the aquaculture tail water gradually rises, the buoyancy of the aquaculture tail water cooperates with the buoyancy sleeve (4) to drive the extension pipe (3) to move; S2: When the aquaculture tail water reaches the specified water level in the tail water treatment tank (1), the stop rod (7) will hinder the movement of the sealing plate (6), causing the sealing plate (6) to stretch the first spring (5) and connecting the extension pipe (3) to the additive pipe (2); S3: Turn on the pump. The pump sprays the flocculant into the tail water treatment tank (1) along the additive pipe (2) and the extension pipe (3), so that the aquaculture tail water and the flocculant are fully mixed, and the phosphorus in the aquaculture tail water coagulates and settles.

7. A method for treating phosphorus-rich aquaculture tail water according to claim 6, characterized in that: The method further includes the following steps: S4: When the flocculant passes through the spray pipe, the flocculant will be filled into the special-shaped spray pipe (8) and sprayed out along the two nozzles of the special-shaped spray pipe (8); S5: The force generated when the special-shaped spray pipe (8) sprays the flocculant drives the special-shaped spray pipe (8) to rotate, expanding the spraying range of the flocculant. The rotating special-shaped spray pipe (8) stirs the aquaculture tail water, so that the two are fully mixed.

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