Ecological restoration breeding tail water purification device and purification method thereof

Abstract

The invention relates to the technical field of aquaculture tail water purification equipment, in particular to an ecological restoration aquaculture tail water purification device and a purification method thereof. Comprising a flocculation unit, a filtering unit, an ultraviolet sterilization unit, an ozone disinfection unit and a sewage suction unit, the filtering unit is arranged below the flocculation unit, the flocculation unit is connected with the filtering unit through a connecting pipe, the ultraviolet sterilization unit is arranged below the filtering unit, the sewage suction unit is arranged on one side of the filtering unit, and the ozone disinfection unit is arranged on the other side of the filtering unit. One end of the sewage suction unit extends to the inner side of the filtering unit, an ozone disinfection unit is arranged below the sewage suction unit, and the ozone disinfection unit is connected with the ultraviolet sterilization unit through a water suction pump. The technical problems that existing breeding tail water contains a large amount of residual feed, excrement of bred organisms, suspended solids and pathogens, if the existing breeding tail water is directly discharged to a surrounding water area, the living environment of aquatic organisms and aquatic plants in the water area can be changed, and biodiversity is damaged are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of aquaculture tail water purification equipment, and in particular to an ecological restoration aquaculture tail water purification device and a purification method thereof. Background Art

[0002] Aquaculture tailwater refers to the water discharged from the aquaculture pond after the aquaculture organisms are metabolized and the residual bait is decomposed during the aquaculture process. Aquaculture tailwater contains a large amount of residual bait, feces of aquaculture organisms, suspended matter, pathogens, etc. Among them, organic matter such as residual bait and feces will be decomposed by microorganisms in the water. At the same time, the residual bait and feces are rich in nutrients such as nitrogen and phosphorus, which will lead to eutrophication of the water body. Excessive nutrients will promote the explosive growth of algae, form algal blooms, consume dissolved oxygen in the water, and cause the death of a large number of aquatic organisms; at the same time, the suspended matter in the aquaculture tailwater will contain some silt, microbial aggregates and organic debris that have not been completely decomposed, which will directly cause turbidity of the water body, reduce the transparency of the water body, and affect the photosynthesis of aquatic plants; and the presence of pathogens and harmful microorganisms in the aquaculture tailwater may cause harm to the ecosystem of the surrounding waters. If the aquaculture tailwater is directly discharged into the surrounding waters, the residual bait, feces of aquaculture organisms, suspended matter, and pathogens in the water body will change the living environment of aquatic organisms and aquatic plants, resulting in damage to biodiversity. Therefore, purification of aquaculture tailwater is very necessary. Summary of the invention

[0003] The purpose of the present invention is to solve the technical problem that the existing aquaculture tail water contains a large amount of residual bait, feces of the farmed organisms, suspended matter and pathogens in the above background. If it is directly discharged into the surrounding waters, it will change the living environment of aquatic organisms and aquatic plants in the waters, resulting in damage to biodiversity. An ecological restoration aquaculture tail water purification device and a purification method thereof are proposed.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: An ecological restoration aquaculture tail water purification device comprises a flocculation unit, a filtration unit, an ultraviolet sterilization unit, an ozone disinfection unit and a sewage suction unit, wherein the device is characterized in that a filtration unit is arranged below the flocculation unit, the flocculation unit and the filtration unit are connected through a connecting pipe, an ultraviolet sterilization unit is arranged below the filtration unit, a sewage suction unit is arranged on one side of the filtration unit, one end of the sewage suction unit extends to the inner side of the filtration unit, an ozone disinfection unit is arranged below the sewage suction unit, and the ozone disinfection unit and the ultraviolet sterilization unit are connected through a water pump.

[0005] The flocculation unit comprises a flocculation tank which is rectangular in shape. Support legs are arranged at the bottom of the four corners of the flocculation tank. A spray assembly is arranged on the edge of one end of the flocculation tank. An overflow port is arranged at the other end of the flocculation tank, and an overflow pipe is arranged on the overflow port.

[0006] The spray assembly includes an assembly plate, a storage tank is mounted on the assembly plate, an opening is provided at the top of the storage tank, a cover plate is installed on the opening, a water spray pump is mounted on the assembly plate on one side of the storage tank, a nozzle is mounted on the assembly plate below the water spray pump, a water inlet pipe of the water spray pump is connected to the storage tank, and a water outlet pipe of the water spray pump is connected to the nozzle.

[0007] The filter unit includes a filter cartridge, a positioning wheel, a left end cover and a right end cover. The left end cover is installed at one end of the filter cartridge, and the right end cover is installed at the other end of the filter cartridge. Annular grooves are arranged on the circumferences of the left and right end covers. Positioning wheels are arranged on the supporting legs of the flocculation unit corresponding to the annular grooves through movable shafts. The positioning wheels are slidably connected with the annular grooves. A baffle is arranged under the filter cartridge, and the baffle is connected to the flocculation tank through a steel wire rope and a hook.

[0008] A left rotating gear is fixedly mounted on the end surface of the left end cover, a right rotating gear is fixedly mounted on the end surface of the right end cover, a driving gear is arranged below the left rotating gear, the driving gear is meshed and connected with the left rotating gear, a driving motor is arranged between the supporting legs on one side of the driving gear through a mounting seat, the driving motor is connected with the driving gear, a driven gear is movably mounted between the supporting legs on one side below the right rotating gear through a mounting frame and a rotating shaft, the driven gear is meshed with the right rotating gear.

[0009] The filter cartridge is in the shape of a cylinder with openings at both ends. Through grooves are evenly distributed on the circumference of the filter cartridge, and filter nets are mounted on the through grooves via a fixing frame.

[0010] The baffle is in an arc shape, and a plurality of water leakage holes are arranged on the circumference of the baffle.

[0011] The ultraviolet sterilization unit comprises an ultraviolet sterilization lamp and a sterilization pool, and a plurality of ultraviolet sterilization lamps are evenly arranged in the sterilization pool.

[0012] The ozone disinfection unit comprises an ozone disinfector and a water outlet pipe, and the ozone disinfector is connected with the water outlet pipe.

[0013] The sewage suction unit comprises a sewage suction head, a sewage suction pipe, a sewage collecting cylinder and a sewage suction pump. The sewage suction pipe is movably inserted on the filter cylinder, one end of the sewage suction pipe extends into the filter cylinder, and the sewage suction head is installed on the end of the sewage suction pipe extending into the filter cylinder. The cross-section of the sewage suction head is in the shape of a "U". The sewage suction head is bent at a right angle as a whole. A sewage suction nozzle is arranged on the outer edge of the sewage suction head. The sewage suction nozzle is connected with the inner cavity of the sewage suction head, and the inner cavity of the sewage suction head is connected with the inner cavity of the sewage suction pipe. One end of the sewage suction pipe extends to the outside of the filter cylinder, and a sewage suction pump is installed on the end of the sewage suction pipe extending to the outside of the filter cylinder. The sewage suction pump is connected with the sewage collecting cylinder through a connecting pipe.

[0014] The purification method of the above-mentioned ecological restoration aquaculture tail water purification device comprises the following steps: Step 1: First, introduce the aquaculture tail water into the flocculation tank of the flocculation unit, and spray the flocculant through the spraying component, so that the suspended particles and colloidal substances in the water are condensed into larger flocs, so as to facilitate the next step of filtration; Step 2: When the water in the flocculation tank gradually increases, the water in the flocculation tank will pass through the overflow port, the overflow pipe and the connecting pipe into the filter cartridge of the filter unit, the driving motor is started, the driving motor drives the filter cartridge to rotate, and the aquaculture tail water flowing out of the connecting pipe impacts the filter screen on the inner wall of the filter cartridge. As the filter cartridge keeps rotating, the aquaculture tail water impacts the filter screen on the inner wall of the filter cartridge at different positions, thereby filtering the aquaculture tail water; Step 3: Start the sewage suction pump, which sucks the sewage from the inner wall of the filter cartridge through the sewage suction head. The sucked solid dirt is collected by the sewage collection cylinder to clean the filter screen, thereby ensuring that the filter screen continues to have a filtering effect; Step 4: The filtered aquaculture tail water enters the sterilization tank through the baffle, and the ultraviolet sterilization lamp in the sterilization tank performs ultraviolet sterilization treatment on the aquaculture tail water; Step 5: After ultraviolet sterilization, the aquaculture tail water enters the ozone disinfection unit through a water pump for ozone disinfection. The aquaculture tail water after ozone disinfection can be discharged into nearby waters.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are: In the present invention, the device flocculates the aquaculture tail water by spraying a flocculant in a flocculation tank and a spraying assembly, so that the suspended particles and colloidal substances in the water are condensed into larger flocs, so as to facilitate the next step of filtering. By setting an overflow port, the aquaculture tail water enters the filter cylinder of the filter unit through the overflow pipe and the connecting pipe under the action of its own gravity, and the filter cylinder is driven to rotate by a driving motor. The aquaculture tail water flowing out of the connecting pipe impacts the filter screen on the inner wall of the filter cylinder. As the filter cylinder rotates continuously, the position of the aquaculture tail water impacting the filter screen on the inner wall of the filter cylinder is constantly alternating, thereby filtering the aquaculture tail water. The inner wall of the filter cylinder is sucked by a sewage suction pump through a sewage suction head, and the sucked solid dirt is collected by a sewage collection cylinder to clean the filter screen, thereby ensuring that the filter screen continues to have a filtering effect. The filtered aquaculture tail water enters the sterilization tank through the baffle, and the ultraviolet sterilization lamp in the sterilization tank sterilizes the aquaculture tail water with ultraviolet light. The aquaculture tail water after ultraviolet sterilization enters the ozone disinfection unit through the pump for ozone disinfection, and the aquaculture tail water after ozone disinfection can be discharged to nearby waters. This device effectively solves the technical problem that the existing aquaculture tail water contains a large amount of residual bait, feces of aquaculture organisms, suspended matter and pathogens. If it is directly discharged into the surrounding waters, it will change the living environment of aquatic organisms and aquatic plants in the waters, resulting in damage to biodiversity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1A three-dimensional structural schematic diagram of an ecological restoration aquaculture tail water purification device is proposed for the present invention; Figure 2 It is a front view structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of a cutaway three-dimensional structure of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the filter unit in the present invention; Figure 5 It is a schematic diagram of the assembled three-dimensional structure of the sewage suction head and the sewage suction pipe in the present invention.

[0017] Legend: 1. Flocculation unit; 2. Filtration unit; 3. Ultraviolet sterilization unit; 4. Ozone disinfection unit; 5. Sewage suction unit; 6. Support legs; 7. Flocculation tank; 8. Overflow port; 9. Overflow pipe; 10. Assembly plate; 11. Storage tank; 12. Spray pump; 13. Spray head; 14. Filter cartridge; 15. Positioning wheel; 16. Left end cover; 17. Right end cover; 18. Filter screen; 19. Fixing frame; 20. Ring groove; 21 , baffle; 22, water leakage hole; 23, left rotating gear; 24, right rotating gear; 25, driving gear; 26, driven gear; 27, ultraviolet sterilization lamp; 28, sterilization tank; 29, sewage suction head; 30, sewage suction pipe; 31, sewage collection cylinder; 32, sewage suction pump; 33, sewage suction nozzle; 34, scraper; 35, connecting pipe; 36, ozone disinfector; 37, water outlet pipe; 38, connecting pipe; 39, driving motor. DETAILED DESCRIPTION

[0018] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0019] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0020] See also Figure 1-5The present invention provides a technical solution: an ecological restoration aquaculture tail water purification device, comprising a flocculation unit 1, a filtration unit 2, an ultraviolet sterilization unit 3, an ozone disinfection unit 4 and a sewage suction unit 5, the flocculation unit 1 comprises a flocculation tank 7, the flocculation tank 7 is rectangular, and support legs 6 are arranged at the bottom of the four corners of the flocculation tank 7, the support legs 6 raise the flocculation tank 7, an overflow port 8 is arranged at one end of the flocculation tank 7, and an overflow pipe 9 is fixedly installed on the overflow port 8. When working, the raised flocculation tank 7 can increase a certain gravitational potential energy for the aquaculture tail water, so as to facilitate the subsequent aquaculture tail water to flow naturally downward through the overflow pipe 9.

[0021] A spraying assembly is installed on the edge of one end of the flocculation tank 7, and the spraying assembly includes an assembly plate 10. The cross-section of the assembly plate 10 is "L"-shaped. A storage tank 11 is fixedly installed on the assembly plate 10. An opening is set at the top of the storage tank 11 to facilitate the addition of flocculant into the storage tank 11. A cover plate is installed on the opening. Flocculant can be stored in the storage tank 11. Flocculants such as polyaluminum chloride and polyacrylamide are installed. A water spray pump 12 is fixedly installed on the assembly plate 10 on one side of the storage tank 11. A nozzle 13 is installed on the assembly plate 10 below the water spray pump 12. The water inlet pipe of the water spray pump 12 is connected to the storage tank 11, and the water outlet pipe 37 of the water spray pump 12 is connected to the nozzle 13. When working, the water spray pump 12 absorbs the flocculant in the storage tank 11 and sprays the flocculant into the flocculation tank 7 through the nozzle 13.

[0022] A filter unit 2 is arranged below the flocculation unit 1, and the filter unit 2 includes a filter cartridge 14, a positioning wheel 15, a left end cover 16 and a right end cover 17. The filter cartridge 14 is a cylindrical shape with openings at both ends. Through grooves are evenly distributed on the circumference of the filter cartridge 14, and a filter screen 18 is laid on the through groove. The filter screen 18 is made of stainless steel, and a fixing frame 19 is pressed onto the outer side of the filter screen 18. The fixing frame 19 is a rectangular frame, and the fixing frame 19 is fixed to the outer circle of the filter cartridge 14 by bolts. When working, the larger flocs formed in the aquaculture tail water, as well as residual bait and feces can be filtered through the filter screen 18.

[0023] The fixing frame 19 installed by bolts can be easily disassembled to facilitate the replacement of the filter screen 18 at a later time. At the same time, the fixing frame 19 realizes the functions of pressing and supporting the filter screen 18 to ensure the flatness of the filter screen 18.

[0024] A left end cover 16 is detachably mounted on one end of the filter cartridge 14 by means of bolts, and a right end cover 17 is detachably mounted on one end of the filter cartridge 14 by means of bolts. Annular grooves 20 are arranged on the circumferences of the left and right end covers 16 and 17. Four positioning wheels 15 are movably mounted on the supporting legs 6 of the flocculation unit 1 corresponding to the annular grooves 20 of the left end cover 16 by means of a movable shaft, and four positioning wheels 15 are movably mounted on the supporting legs 6 of the flocculation unit 1 corresponding to the annular grooves 20 of the right end cover 17 by means of a movable shaft. Each positioning wheel 15 is slidably connected with the annular grooves 20. During operation, the circumference of the filter cartridge 14 can be limited by the cooperation of each positioning wheel 15 with the annular grooves 20 to prevent its axial movement. At the same time, the filter cartridge 14 can rotate circumferentially to facilitate the staggered replacement of each filter screen 18 to ensure the continuity of filtration.

[0025] A baffle 21 is arranged below the filter cartridge 14. The baffle 21 is in an arc shape and has a plurality of leakage holes 22 on its circumference. The baffle 21 is detachably connected to the flocculation tank 7 via a steel wire rope and a hook. When in operation, the baffle 21 can block the filter cartridge 14. The water splashing caused by the filter net 18 and the rotation of the filter cartridge 14 will be blocked by the baffle 21, thereby effectively preventing the water splashing. At the same time, the water can be gathered by the baffle 21 and flow into the sterilization tank 28 through the leakage holes 22.

[0026] A left rotating gear 23 is fixedly mounted on the end surface of the left end cover 16, and a right rotating gear 24 is fixedly mounted on the end surface of the right end cover 17. A driving gear 25 is arranged below the left rotating gear 23, and the driving gear 25 is meshed and connected with the left rotating gear 23. A driving motor 39 is installed between the supporting legs 6 on one side of the driving gear 25 through a mounting seat, and the driving motor 39 is connected to the driving gear 25. A driven gear 26 is movably installed between the supporting legs 6 on one side below the right rotating gear 24 through a mounting frame and a rotating shaft, and the driven gear 26 is meshed with the right rotating gear 24. During operation, the driving gear 25 is driven to rotate by the driving motor 39, thereby driving the left rotating gear 23 to rotate, and the left rotating gear 23 drives the filter cartridge 14 to rotate through the left end cover 16. The driven gear 26 cooperates with the right rotating gear 24 to ensure the synchronization of both ends of the filter cartridge 14 when rotating, and improve the stability of the rotation of the filter cartridge 14.

[0027] The flocculation unit 1 is connected to the filtration unit 2 via a connecting tube 38 , one end of which extends through the inner side of the filter cartridge 14 of the left end cover 16 , and the connecting tube 38 is movably connected to the left end cover 16 via a bearing.

[0028] An ultraviolet sterilization unit 3 is arranged below the filtering unit 2. The ultraviolet sterilization unit 3 includes an ultraviolet sterilization lamp 27 and a sterilization pool 28. A plurality of ultraviolet sterilization lamps 27 are evenly distributed in the sterilization pool 28. The ultraviolet sterilization lamps 27 are commercially available products. When working, the filtered aquaculture tail water dripping from the leakage hole 22 of the baffle 21 into the sterilization pool 28 is sterilized by the ultraviolet sterilization lamps 27.

[0029] A sewage suction unit 5 is provided on one side of the filter unit 2. The sewage suction unit 5 includes a sewage suction head 29, a sewage suction pipe 30, a sewage collecting cylinder 31 and a sewage suction pump 32. The sewage suction pipe 30 is movably inserted into the filter cylinder 14 through a bearing. One end of the sewage suction pipe 30 extends into the filter cylinder 14. The sewage suction head 29 is fixedly installed on the end of the sewage suction pipe 30 extending into the filter cylinder 14. The sewage suction head 29 has a "Hu"-shaped cross-section, and the sewage suction head 29 is bent at a right angle as a whole. A sewage suction nozzle 33 is provided on the outer edge of the sewage suction head 29. The sewage suction nozzle 33 is connected to the inner cavity of the sewage suction head 29, and the inner cavity of the sewage suction head 29 is connected to the inner cavity of the sewage suction pipe 30. One side of the sewage suction nozzle 33 A scraper 34 is provided on the outer edge of the suction head 29, one end of the suction pipe 30 extends to the outside of the filter cartridge 14, and a suction pump 32 is installed on the end of the suction pipe 30 extending to the outside of the filter cartridge 14. The suction pump 32 is connected to the sewage collecting cylinder 31 through a connecting pipe 35. When working, the suction pump 32 absorbs impurities (suspended matter, residual bait and feces) remaining on the inner wall of the filter cartridge 14 through the suction pipe 30 and the suction head 29, and transports them to the sewage collecting cylinder 31 through the connecting pipe 35. The scraper 34 can scrape and gather the impurities (suspended matter, residual bait and feces) remaining on the inner wall of the filter cartridge 14, making it convenient for the suction head 29 to absorb them.

[0030] An ozone disinfection unit 4 is arranged below the sewage suction unit 5. The ozone disinfection unit 4 includes an ozone sterilizer 36 and a water outlet pipe 37. The ozone sterilizer 36 is a commercially purchased part (model WTS-2A). The ozone sterilizer 36 is connected to the water outlet pipe 37. The ozone disinfection unit 4 is connected to the ultraviolet sterilization unit 3 through a water pump. When working, the water pump sucks the aquaculture tail water in the sterilization tank 28 into the ozone sterilizer 36 for disinfection, and the disinfected aquaculture tail water is discharged from the water outlet pipe 37.

[0031] Working principle: First, the aquaculture tail water is introduced into the flocculation tank 7 of the flocculation unit 1, and the flocculant is sprayed through the spraying component, so that the suspended particles and colloidal substances in the water are condensed into larger flocs, so as to facilitate the next step of filtration.

[0032] Then, when the water in the flocculation tank 7 gradually increases, the water in the flocculation tank 7 will pass through the overflow port 8, through the overflow pipe 9 and the connecting pipe 38 into the filter cylinder 14 of the filter unit 2, and the driving motor will be started. The driving motor drives the filter cylinder 14 to rotate, and the aquaculture tail water flowing out of the connecting pipe 38 impacts the filter screen 18 on the inner wall of the filter cylinder 14. As the filter cylinder 14 keeps rotating, the position of the aquaculture tail water impacting the filter screen 18 on the inner wall of the filter cylinder 14 is constantly alternating, thereby filtering the aquaculture tail water.

[0033] At this time, the sewage suction pump 32 is started, and the sewage suction pump 32 sucks sewage from the inner wall of the filter cylinder 14 through the sewage suction head 29. The sucked solid sewage is collected by the sewage collecting cylinder 31 to clean the filter screen 18, thereby ensuring that the filter screen 18 continues to have a filtering effect.

[0034] Until the filtered aquaculture tail water passes through the baffle 21 and enters the sterilization tank 28, the ultraviolet sterilization lamp 27 in the sterilization tank 28 performs ultraviolet sterilization treatment on the aquaculture tail water.

[0035] Thus, the aquaculture tail water after ultraviolet sterilization enters the ozone disinfection unit 4 through the water pump for ozone disinfection, and the aquaculture tail water after ozone disinfection can be discharged into nearby waters.

Claims

1. An ecological restoration aquaculture tail water purification device, comprising a flocculation unit (1), a filtration unit (2), an ultraviolet sterilization unit (3), an ozone disinfection unit (4) and a sewage suction unit (5), characterized in that: A filter unit (2) is arranged below the flocculation unit (1), the flocculation unit (1) and the filter unit (2) are connected via a connecting pipe (38), an ultraviolet sterilization unit (3) is arranged below the filter unit (2), a sewage suction unit (5) is arranged on one side of the filter unit (2), one end of the sewage suction unit (5) extends to the inside of the filter unit (2), an ozone disinfection unit (4) is arranged below the sewage suction unit (5), and the ozone disinfection unit (4) and the ultraviolet sterilization unit (3) are connected via a water pump.

2. The ecological restoration aquaculture tail water purification device according to claim 1 is characterized by: The flocculation unit (1) comprises a flocculation tank (7), which is rectangular in shape. Support legs (6) are arranged at the bottom of the four corners of the flocculation tank (7). A spraying assembly is arranged on the edge of one end of the flocculation tank (7). An overflow port (8) is arranged at the other end of the flocculation tank (7), and an overflow pipe (9) is arranged on the overflow port (8).

3. The ecological restoration aquaculture tail water purification device according to claim 2 is characterized by: The spray assembly comprises an assembly plate (10), a storage tank (11) is mounted on the assembly plate (10), an opening is arranged at the top of the storage tank (11), a cover plate is mounted on the opening, a water spray pump (12) is mounted on the assembly plate (10) on one side of the storage tank (11), a spray head (13) is mounted on the assembly plate (10) below the water spray pump (12), a water inlet pipe of the water spray pump (12) is connected to the storage tank (11), and a water outlet pipe (37) of the water spray pump (12) is connected to the spray head (13).

4. The ecological restoration aquaculture tail water purification device according to claim 1 is characterized by: The filter unit (2) comprises a filter cartridge (14), a positioning wheel (15), a left end cover (16) and a right end cover (17). The filter cartridge (14) is provided with a left end cover (16) at one end and a right end cover (17) at the other end. Annular grooves (20) are provided on the circumferences of the left end cover (16) and the right end cover (17). A positioning wheel (15) is provided on a supporting leg (6) of the flocculation unit (1) corresponding to the annular groove (20) via a movable shaft. The positioning wheel (15) is slidably connected to the annular groove (20). A baffle (21) is provided below the filter cartridge. The baffle (21) is connected to the flocculation tank (7) via a steel wire rope and a hook.

5. The ecological restoration aquaculture tail water purification device according to claim 4 is characterized by: A left rotating gear (23) is fixedly mounted on the end surface of the left end cover (16), a right rotating gear (24) is fixedly mounted on the end surface of the right end cover (17), a driving gear (25) is arranged below the left rotating gear (23), the driving gear (25) is meshedly connected with the left rotating gear (23), a driving motor (39) is mounted between the supporting legs (6) on one side of the driving gear (25) via a mounting seat, the driving motor (39) is connected with the driving gear (25), a driven gear (26) is movably mounted between the supporting legs (6) on one side below the right rotating gear (24) via a mounting frame and a rotating shaft, the driven gear (26) is meshed with the right rotating gear (24).

6. The ecological restoration aquaculture tail water purification device according to claim 4 is characterized by: The filter cartridge (14) is cylindrical with openings at both ends. Through grooves are evenly distributed on the circumference of the filter cartridge (14), and a filter screen (18) is mounted on the through grooves via a fixing frame (19).

7. The ecological restoration aquaculture tail water purification device according to claim 4 is characterized by: The baffle (21) is in the shape of an arc, and a plurality of water leakage holes (22) are arranged on the circumference of the baffle (21).

8. The ecological restoration aquaculture tail water purification device according to claim 1 is characterized by: The ultraviolet sterilization unit (3) comprises an ultraviolet sterilization lamp (27) and a sterilization pool (28), wherein a plurality of ultraviolet sterilization lamps (27) are evenly distributed in the sterilization pool (28).

9. The ecological restoration aquaculture tail water purification device according to claim 1, characterized in that: The sewage suction unit (5) comprises a sewage suction head (29), a sewage suction pipe (30), a sewage collecting cylinder (31) and a sewage suction pump (32). The sewage suction pipe (30) is movably inserted into the filter cylinder (14). One end of the sewage suction pipe (30) extends into the filter cylinder (14). The sewage suction head (29) is mounted on the end of the sewage suction pipe (30) extending into the filter cylinder (14). The sewage suction head (29) has a cross-section in the shape of a Chinese character "U". The sewage suction head (29) is bent at a right angle as a whole. A sewage suction nozzle (33) is provided on the outer edge of the sewage suction head (29), the sewage suction nozzle (33) is connected to the inner cavity of the sewage suction head (29), the inner cavity of the sewage suction head (29) is connected to the inner cavity of the sewage suction pipe (30), one end of the sewage suction pipe (30) extends to the outside of the filter cartridge (14), and a sewage suction pump (32) is installed on the end of the sewage suction pipe (30) extending to the outside of the filter cartridge (14), and the sewage suction pump (32) is connected to the sewage collection cartridge (31) through a connecting pipe (35).

10. A purification method for an ecological restoration aquaculture tail water purification device, comprising the following steps: Step 1: First, the aquaculture tail water is introduced into the flocculation tank (7) of the flocculation unit (1), and the flocculating agent is sprayed through the spraying component, so that the suspended particles and colloidal substances in the water are condensed into larger flocs, so as to facilitate the next step of filtration; Step 2: When the amount of water in the flocculation tank (7) gradually increases, the water in the flocculation tank (7) enters the filter cartridge (14) of the filter unit (2) through the overflow port (8), the overflow pipe (9) and the connecting pipe (38), and the driving motor is started. The driving motor drives the filter cartridge (14) to rotate, and the aquaculture tail water flowing out of the connecting pipe (38) impacts the filter screen (18) on the inner wall of the filter cartridge (14). As the filter cartridge (14) rotates continuously, the position where the aquaculture tail water impacts the filter screen (18) on the inner wall of the filter cartridge (14) is constantly alternating, thereby filtering the aquaculture tail water; Step 3: Start the sewage suction pump (32), and the sewage suction pump (32) sucks sewage from the inner wall of the filter cylinder (14) through the sewage suction head (29), and the sucked solid sewage is collected by the sewage collection cylinder (31) to clean the filter screen (18), thereby ensuring that the filter screen (18) continues to have a filtering effect; Step 4: the filtered aquaculture tail water enters the sterilization tank (28) through the baffle (21), and the ultraviolet sterilization lamp (27) in the sterilization tank (28) performs ultraviolet sterilization treatment on the aquaculture tail water; Step 5: After the ultraviolet sterilization, the aquaculture tail water enters the ozone disinfection unit (4) through a water pump for ozone disinfection. The aquaculture tail water after ozone disinfection can be discharged into nearby waters.

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