Seawater aquaculture tailwater treatment equipment and use method thereof

Abstract

The present invention relates to the technical field of sewage treatment, and discloses a seawater aquaculture tailwater treatment device and a method for using the same. The device comprises a water reservoir; a first filter assembly comprising a first filter tank, a first filter screen, and a first cleaning member, wherein the first filter tank is connected to the water reservoir, the first filter screen is fixedly connected to the first filter tank, the first cleaning member is disposed in the first filter tank and below the first filter screen, and cleans the first filter screen by radial movement; and a second filter assembly comprising a second filter tank, a filter member, and a drive cleaning member, wherein the second filter tank is connected to the first filter tank, the filter member is disposed on the second filter tank, and the filter member is driven to move by the drive cleaning member to achieve secondary filtration of the aquaculture tailwater, and the filter member is cleaned by the drive cleaning member. The present invention achieves multi-stage filtration of the aquaculture tailwater, avoids clogging of the filter structure, and ensures filtration efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, in particular to seawater aquaculture tail water treatment equipment and a use method thereof. Background Art

[0002] Mariculture is a key aquaculture method, but it produces a significant amount of wastewater. This wastewater, concentrated during the harvest season and rich in leftover bait and feces, is randomly discharged into coastal waters, causing a series of ecological problems. If this wastewater is not promptly and effectively treated, it will not only deteriorate the environment and water quality of the aquaculture areas, but also lead to disease outbreaks and even widespread mortality among fish and shrimp, directly impacting the quality of aquaculture products and causing a sharp decline in production.

[0003] In the prior art, aquaculture tailwater treatment typically involves using sedimentation, filtration, and biological treatment technologies to effectively treat the wastewater and remove pollutants, thereby achieving water recycling and utilization. However, prior art filtration of aquaculture tailwater often involves filtering through a separate filter. During the filtration process, the presence of large particles of impurities such as aquatic plants and rocks within the tailwater can cause clogging of the filter. Furthermore, the tailwater often contains large amounts of bait and fecal debris, which are sticky and can clog the filter, thereby affecting the filter's efficiency.

[0004] Therefore, there is an urgent need for marine aquaculture tail water treatment equipment and a method of using the same to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a seawater aquaculture tailwater treatment device and a method of using the same to solve the problems existing in the above-mentioned prior art.

[0006] To achieve the above-mentioned object, the present invention provides the following solution: The present invention provides a seawater aquaculture tailwater treatment device, comprising:

[0007] water reservoir;

[0008] a first filter assembly comprising a first filter tank, a first filter screen, and a first cleaning member, wherein the first filter tank is in communication with the water reservoir, the first filter screen is fixedly connected within the first filter tank, and the first cleaning member is disposed within the first filter tank and below the first filter screen, and cleans the first filter screen by radial movement;

[0009] The second filter assembly includes a second filter tank, a filter element and a drive cleaning element. The second filter tank is connected to the first filter tank. The filter element is arranged on the second filter tank, and the drive cleaning element drives the filter element to move to achieve secondary filtration of the aquaculture tail water, and the drive cleaning element cleans the filter element.

[0010] According to the seawater aquaculture tailwater treatment equipment provided by the present invention, the first cleaning component includes:

[0011] A support frame is located below the first filter screen, and a plurality of first cleaning heads are fixedly connected to the top of the support frame, wherein the first cleaning heads are adapted to the meshes of the first filter screen;

[0012] The driving member includes a bracket, which is fixedly connected to the top of the first filter tank. The bracket is fixedly connected to a first motor. A cam is installed at the output end of the first motor. One end of a support rod is fixedly connected to the top of the support frame. The other end of the support rod passes through the first filter screen and is fixedly connected to a top block. The cam is arranged in contact with the top block.

[0013] According to the seawater aquaculture tailwater treatment equipment provided by the present invention, a first spring is fixedly connected to the support rod, and two ends of the first spring are fixedly connected to the bracket and the top block respectively.

[0014] According to the seawater aquaculture tailwater treatment equipment provided by the present invention, the filter element includes:

[0015] The second filter screen has two ends fixedly connected to form a belt-like structure;

[0016] A plurality of rotating rollers, wherein a cavity is formed in the wall of the second filter tank, and the plurality of rotating rollers are respectively mounted in the cavity via fixing frames, and the second filter screen is sleeved on the plurality of rotating rollers and stretched into an annular structure, wherein the upper ring of the annular structure is located in the second filter tank, and the lower ring of the annular structure is located in the cavity;

[0017] The driving cleaning member includes a second cleaning member and a flushing member. The second cleaning member is arranged in the second filter tank for driving and cleaning the second filter screen, and the flushing member is arranged in the cavity for flushing the second filter screen.

[0018] According to the seawater aquaculture tailwater treatment equipment provided by the present invention, the second cleaning component includes:

[0019] A support frame is fixedly connected in the second filter tank and is located directly below the upper ring body of the annular structure;

[0020] A swing plate has a through hole at one end, a turntable is rotatably connected in the through hole, a rotating shaft is fixedly connected to an eccentric point of the turntable, the rotating shaft is rotatably connected to the support frame, a second motor is fixedly connected to the support frame, and one end of the rotating shaft is fixedly connected to the output end of the second motor;

[0021] The cleaning plate is fixedly connected to the top of the swing plate. A plurality of second cleaning heads are fixedly connected to the cleaning plate. The second cleaning heads are adapted to the meshes of the second filter screen.

[0022] According to the seawater aquaculture tailwater treatment equipment provided by the present invention, the bottom end of the support frame is fixedly connected to a limiting column, the limiting column is located directly below the rotating shaft, the bottom end of the swing plate is provided with a limiting groove, the limiting column is adapted to the limiting groove.

[0023] According to the seawater aquaculture tailwater treatment equipment provided by the present invention, the flushing component includes:

[0024] A spray pipe is fixedly connected in the cavity, the spray pipe is located just above the lower ring of the annular structure, and the spray pipe is connected to the bottom end of the second filter tank through a pipeline;

[0025] A plurality of spray heads are axially mounted on the spray pipe, and the turned-over second filter screen is backwashed through the spray heads.

[0026] According to the seawater aquaculture tailwater treatment equipment provided by the present invention, the cleaning plate is an arc-shaped structure, and the plurality of second cleaning heads are arranged obliquely.

[0027] The seawater aquaculture tailwater treatment equipment provided by the present invention further includes:

[0028] a collecting tank fixedly connected in the cavity for collecting filtered matter on the second filter screen;

[0029] a collecting roller located in the cavity, a first frame fixedly connected to the cavity, a second frame slidably connected to the first frame via a second spring, the collecting roller being mounted on the second frame and in contact with the second filter screen;

[0030] A plurality of protrusions are fixedly connected to the collecting roller, and the protrusions are adapted to the meshes of the second filter screen.

[0031] A method for using a seawater aquaculture tailwater treatment device comprises the following steps:

[0032] The aquaculture tail water stored in the water reservoir is transported to the first filter tank, and the large particles of impurities are primarily filtered through the first filter screen;

[0033] During the filtering process, the first filter screen is cleaned synchronously by the first cleaning member;

[0034] The aquaculture tail water after primary filtration is transported to the second filtration tank, and the bait and fecal residue are subjected to secondary filtration through the filter element;

[0035] During the filtering process, the filter element is driven to move by the driving cleaning element, and the filter element is cleaned;

[0036] The aquaculture tail water after secondary filtration is stored in the second filter tank and treated with drugs.

[0037] Compared with the prior art, the present invention has the following advantages and technical effects:

[0038] The marine aquaculture tailwater treatment equipment and method provided by the present invention, when in use, conveys aquaculture tailwater stored in a reservoir to a first filter tank, where it undergoes primary filtration of large particles of impurities through a first filter screen. During the filtration process, the first filter screen is simultaneously cleaned by a first cleaning element. After primary filtration, the aquaculture tailwater is conveyed to a second filter tank, where it undergoes secondary filtration of bait and fecal residues through a filter element. During the filtration process, the cleaning element is driven to move and clean the filter element. This application achieves multi-stage filtration of aquaculture tailwater, preventing clogging of the filter structure and ensuring filtration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work.

[0040] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0041] Figure 2 This is a schematic diagram of the internal structure of the first filter tank of the present invention;

[0042] Figure 3 This is a schematic diagram of the internal structure of the second filter tank of the present invention;

[0043] Figure 4 For the present invention Figure 3 A partial enlarged view of the middle A;

[0044] Figure 5 For the present invention Figure 3 A partial enlarged view of point B in the middle;

[0045] Among them, 1. first filter tank; 2. first filter screen; 3. second filter tank; 4. water reservoir; 5. support frame; 6. first cleaning head; 7. bracket; 8. first motor; 9. cam; 10. support rod; 11. top block; 12. first spring; 13. second filter screen; 14. rotating roller; 15. fixed frame; 16. support frame; 17. swing plate; 18. through hole; 19. turntable; 20. rotating shaft; 21. second motor; 22. cleaning plate; 23. second cleaning head; 24. limiting column; 25. limiting groove; 26. spray pipe; 27. spray head; 28. collecting tank; 29. ​​collecting roller; 30. first frame; 31. second spring; 32. second frame. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0047] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] Reference Figure 1-Figure 5 The present invention provides a seawater aquaculture tailwater treatment device, comprising:

[0049] Reservoir 4;

[0050] The first filter assembly includes a first filter tank 1, a first filter screen 2, and a first cleaning member. The first filter tank 1 is connected to the water reservoir 4. The first filter screen 2 is fixedly connected to the first filter tank 1. The first cleaning member is disposed in the first filter tank 1 and below the first filter screen 2. The first cleaning member cleans the first filter screen 2 by moving radially.

[0051] The second filter assembly includes a second filter tank 3, a filter element and a drive cleaning element. The second filter tank 3 is connected to the first filter tank 1. The filter element is arranged on the second filter tank 3, and the filter element is driven to move by the drive cleaning element to achieve secondary filtration of the aquaculture tail water, and the filter element is cleaned by the drive cleaning element.

[0052] In one embodiment of the present invention, when in use, the aquaculture tail water stored in the water reservoir is transported to the first filter tank, and the large particle impurities are primarily filtered through the first filter screen. During the filtration process, the first filter screen is simultaneously cleaned by the first cleaning member. The aquaculture tail water after the primary filtration is transported to the second filter tank, and the bait and feces residues are secondarily filtered through the filter member. During the filtration process, the filter member is driven to move by the cleaning member and the filter member is cleaned.

[0053] As an optional embodiment, the first cleaning member includes:

[0054] The support frame 5 is located below the first filter screen 2. A plurality of first cleaning heads 6 are fixedly connected to the top of the support frame 5. The first cleaning heads 6 are adapted to the mesh of the first filter screen 2.

[0055] The driving part includes a bracket 7, which is fixedly connected to the top of the first filter tank 1. The bracket 7 is fixedly connected to the first motor 8. The output end of the first motor 8 is installed with a cam 9. The top of the support frame 5 is fixedly connected to one end of the support rod 10. The other end of the support rod 10 passes through the first filter screen 2 and is fixedly connected to the top block 11. The cam 9 is arranged in contact with the top block 11.

[0056] In one embodiment of the present invention, the cam 9 is driven to rotate by the first motor 8 , and the rotation of the cam 9 causes the support frame 5 to rise or fall, thereby cleaning the first filter 2 through the first cleaning head 6 on the support frame 5 .

[0057] As an optional embodiment, a first spring 12 is fixedly connected to the support rod 10 , and two ends of the first spring 12 are fixedly connected to the bracket 7 and the top block 11 respectively.

[0058] In one embodiment of the present invention, the vertical movement of the support rod 10 is ensured by the provision of a first spring 12 .

[0059] As an optional embodiment, the filter element includes:

[0060] The second filter 13 has two ends fixedly connected to form a belt-like structure;

[0061] A plurality of rotating rollers 14 are provided, and a cavity is formed in the wall of the second filter tank 3. The plurality of rotating rollers 14 are respectively installed in the cavity through a fixing frame 15. The second filter screen 13 is sleeved on the plurality of rotating rollers 14 and tensioned to form an annular structure, wherein the upper ring of the annular structure is located in the second filter tank 3, and the lower ring of the annular structure is located in the cavity.

[0062] The driving cleaning member includes a second cleaning member and a flushing member. The second cleaning member is arranged in the second filter tank 3 for driving and cleaning the second filter screen 13 , and the flushing member is arranged in the cavity for flushing the second filter screen 13 .

[0063] In one embodiment of the present invention, the second filter screen 13 is a belt-shaped structure that is driven to move by the second cleaning member to clean the second filter screen 13. At the same time, the second filter screen 13 is backwashed by the flushing member, thereby achieving continuous, stable and efficient filtration of the second filter screen 13.

[0064] As an optional embodiment, the second cleaning member includes:

[0065] The support frame 16 is fixedly connected to the second filter tank 3 and is located directly below the upper ring of the annular structure;

[0066] A through hole 18 is formed at one end of the swing plate 17. A turntable 19 is rotatably connected to the through hole 18. A rotating shaft 20 is fixedly connected to the eccentric point of the turntable 19. The rotating shaft is rotatably connected to the support frame 16. A second motor 21 is fixedly connected to the support frame 16. One end of the rotating shaft 20 is fixedly connected to the output end of the second motor 21.

[0067] The cleaning plate 22 is fixedly connected to the top of the swing plate 17 . A plurality of second cleaning heads 23 are fixedly connected to the cleaning plate 22 . The second cleaning heads 23 are adapted to the meshes of the second filter screen 13 .

[0068] In one embodiment of the present invention, a second motor 21 is provided to drive the rotating shaft 20 to rotate, and the rotating shaft 20 is eccentrically connected to the turntable 19, and then the turntable 19 drives the swing plate 17 to swing. The vertical and horizontal swinging of the swing plate 17 drives the second cleaning head 23 to intermittently extend into the second filter screen 13, on the one hand to clean the second filter screen 13, and on the other hand to drive the second filter screen 13 to move forward.

[0069] As an optional embodiment, the bottom end of the support frame 16 is fixedly connected to a limiting column 24 , which is located directly below the rotating shaft 20 . A limiting groove 25 is provided at the bottom end of the swing plate 17 , and the limiting column 24 is adapted to the limiting groove 25 .

[0070] In one embodiment of the present invention, the swing plate 17 slides on the limiting post 24 via the provided limiting slot 25 , thereby ensuring stable swinging of the swing plate 17 .

[0071] As an optional embodiment, the flushing member includes:

[0072] A spray pipe 26 is fixedly connected in the cavity. The spray pipe 26 is located just above the lower ring of the annular structure. The spray pipe 26 is connected to the bottom end of the second filter tank 3 through a pipeline.

[0073] A plurality of spray heads 27 are axially mounted on the spray pipe 26 , and the turned-over second filter screen 13 is backwashed through the spray heads 27 .

[0074] In one embodiment of the present invention, the second filter screen 13 is backwashed by the provided spray pipe 26 and a plurality of spray heads 27, thereby improving the cleaning effect.

[0075] As an optional embodiment, the cleaning plate 22 is an arc-shaped structure, and the plurality of second cleaning heads 23 are arranged at an angle.

[0076] In one embodiment of the present invention, the cleaning plate 22 is an arc-shaped structure and the second cleaning head 23 is tilted, with the tilt direction facing the moving direction of the second filter 13 , thereby ensuring stable movement of the second filter 13 .

[0077] As an optional implementation, it also includes:

[0078] A collecting tank 28 is fixedly connected in the cavity and is used to collect the filtered matter on the second filter screen 13;

[0079] The collecting roller 29 is located in the cavity. The first frame 30 is fixedly connected to the cavity. The second frame 32 is slidably connected to the first frame 30 via a second spring 31. The collecting roller 29 is mounted on the second frame 32 and is in contact with the second filter 13.

[0080] A plurality of protrusions are fixedly connected to the collecting roller 29 , and the protrusions are adapted to the meshes of the second filter screen 13 .

[0081] In one embodiment of the present invention, the collecting roller 29 and the collecting trough 28 are respectively located on both sides of the second filter screen 13. The clogged filter material is further pushed out by the collecting roller 29 and scraped and collected by the collecting trough 28. At the same time, the second spring 31 is provided to apply an elastic force to the collecting roller 29, further ensuring the tension of the second filter screen 13 and ensuring the overall stable movement and cleaning.

[0082] A method for using a seawater aquaculture tailwater treatment device comprises the following steps:

[0083] The aquaculture tail water stored in the reservoir 4 is transported to the first filter tank 1, and the large particles of impurities are primarily filtered through the first filter screen 2;

[0084] In one embodiment of the present invention, when in use, the water stored in the water reservoir 4 is first transported to the first filter tank 1, and the large particles of impurities in the aquaculture tail water are first filtered through the first filter net 2 in the first filter tank 1 to achieve separation of impurities and tail water.

[0085] During the filtering process, the first filter screen 2 is cleaned synchronously by the first cleaning member;

[0086] In one embodiment of the present invention, while filtering through the first filter 2, the filtered material will accumulate or get stuck in the mesh of the first filter 2. The first motor 8 is provided to drive the cam 9 to rotate, so that the support rod 10 moves upward under the action of the first spring 12 to clean the mesh of the first filter 2 through the first cleaning head 6, thereby ensuring the filtering efficiency of the primary filtration.

[0087] The aquaculture tail water after primary filtration is transported to the second filtration tank 3, and the bait and fecal residue are subjected to secondary filtration through the filter element;

[0088] In one embodiment of the present invention, the aquaculture tail water filtered by the first filter 2 is transported to the second filter pool 3 again, and the bait, feces residue, etc. in the aquaculture tail water are filtered again by the second filter 13 .

[0089] During the filtering process, the cleaning element is driven to move the filter element and clean the filter element;

[0090] In one embodiment of the present invention, bait, fecal residue, etc. have a certain viscosity and are easy to accumulate and adhere to the second filter screen 13. When the second filter screen 13 is filtering, the turntable 19 is driven to rotate by the second motor 21. The rotating shaft 20 on the turntable 19 is eccentrically set. The turntable 19 drives the swing plate 17 to swing left and right and vertically at the same time, and then the second cleaning head 23 is extended into the mesh of the second filter screen 13 for cleaning and at the same time drives the second filter screen 13 to move on the rotating roller 14, synchronously realizing the cleaning and movement of the second filter screen 13, so that the second filter screen 13 continues to filter, and at the same time the circulating second filter screen 13 rotates and flips into the cavity, and the second filter screen 13 is backwashed by spraying water through the provided spray pipe 26, thereby realizing the recycling of the second filter screen 13 and ensuring the filtration efficiency.

[0091] The aquaculture tail water after secondary filtration is stored in the second filter tank 3 and treated with drugs.

[0092] The aquaculture tail water filtered through the second filter screen 13 is stored in the second filter tank 3 and purified by adding treatment drugs.

[0093] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, 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 cannot be understood as a limitation on the present invention.

[0094] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. Seawater aquaculture tailwater treatment equipment, characterized in that: include: Reservoirs (4); A first filter assembly comprises a first filter pool (1), a first filter screen (2) and a first cleaning member, wherein the first filter pool (1) is in communication with the water reservoir (4), the first filter screen (2) is fixedly connected to the first filter pool (1), the first cleaning member is arranged in the first filter pool (1) and is located below the first filter screen (2), and cleans the first filter screen (2) by moving radially; A second filter assembly comprises a second filter pool (3), a filter element and a drive cleaning element, wherein the second filter pool (3) is connected to the first filter pool (1), the filter element is arranged on the second filter pool (3), and the drive cleaning element drives the filter element to move to achieve secondary filtration of the aquaculture tail water, and the drive cleaning element cleans the filter element; The filter element comprises a second filter screen (13), both ends of which are fixedly connected to form a belt-like structure; The driving cleaning member includes a second cleaning member and a flushing member, the second cleaning member includes a support frame (16), fixedly connected in the second filter tank (3), and located directly below the upper ring body of the annular structure; A swing plate (17) is provided with a through hole (18) at one end, a turntable (19) is rotatably connected in the through hole (18), a rotating shaft (20) is fixedly connected to an eccentric point of the turntable (19), the rotating shaft is rotatably connected to the support frame (16), a second motor (21) is fixedly connected to the support frame (16), and one end of the rotating shaft (20) is fixedly connected to an output end of the second motor (21); A cleaning plate (22) is fixedly connected to the top of the swing plate (17). A plurality of second cleaning heads (23) are fixedly connected to the cleaning plate (22). The second cleaning heads (23) are adapted to the mesh of the second filter screen (13).

2. The seawater aquaculture tailwater treatment equipment according to claim 1, characterized in that: The first cleaning member comprises: A support frame (5) is located below the first filter screen (2), and a plurality of first cleaning heads (6) are fixedly connected to the top of the support frame (5), and the first cleaning heads (6) are adapted to the mesh of the first filter screen (2); The driving member comprises a bracket (7) fixedly connected to the top of the first filter tank (1); a first motor (8) is fixedly connected to the bracket (7); a cam (9) is installed at the output end of the first motor (8); one end of a support rod (10) is fixedly connected to the top of the support frame (5); the other end of the support rod (10) passes through the first filter screen (2) and is fixedly connected to a top block (11); the cam (9) is arranged in contact with the top block (11).

3. The seawater aquaculture tailwater treatment equipment according to claim 2, characterized in that: A first spring (12) is fixedly connected to the support rod (10), and two ends of the first spring (12) are respectively fixedly connected to the bracket (7) and the top block (11).

4. The seawater aquaculture tailwater treatment equipment according to claim 1, characterized in that: The filter element further comprises: A plurality of rotating rollers (14), a cavity is provided in the wall of the second filter tank (3), the plurality of rotating rollers (14) are respectively installed in the cavity via a fixing frame (15), the second filter screen (13) is sleeved on the plurality of rotating rollers (14) and stretched into an annular structure, the upper ring of the annular structure is located in the second filter tank (3), and the lower ring of the annular structure is located in the cavity; The second cleaning member is arranged in the second filter tank (3) for driving and cleaning the second filter screen (13), and the flushing member is arranged in the cavity for flushing the second filter screen (13).

5. The seawater aquaculture tailwater treatment equipment according to claim 1, characterized in that: The bottom end of the support frame (16) is fixedly connected to a limiting column (24), the limiting column (24) is located directly below the rotating shaft (20), and a limiting slot (25) is provided at the bottom end of the swing plate (17), the limiting column (24) is adapted to the limiting slot (25).

6. The seawater aquaculture tailwater treatment equipment according to claim 4, characterized in that: The flushing member comprises: A spray pipe (26) is fixedly connected in the cavity, the spray pipe (26) is located directly above the lower ring body of the annular structure, and the spray pipe (26) is connected to the bottom end of the second filter tank (3) through a pipeline; A plurality of spray heads (27) are axially mounted on the spray pipe (26), and the turned-over second filter screen (13) is backwashed through the spray heads (27).

7. The seawater aquaculture tailwater treatment equipment according to claim 1, characterized in that: The cleaning plate (22) is an arc-shaped structure, and the plurality of second cleaning heads (23) are arranged at an angle.

8. The seawater aquaculture tailwater treatment equipment according to claim 4, characterized in that: Also includes: a collecting tank (28) fixedly connected in the cavity and used for collecting filtered matter on the second filter screen (13); A collecting roller (29) is located in the cavity, a first frame (30) is fixedly connected to the cavity, a second frame (32) is slidably connected to the first frame (30) via a second spring (31), and the collecting roller (29) is mounted on the second frame (32) and is arranged in contact with the second filter screen (13); A plurality of protrusions are fixedly connected to the collecting roller (29), and the protrusions are adapted to the meshes of the second filter screen (13).

9. A method for using a seawater aquaculture tailwater treatment device, applicable to the seawater aquaculture tailwater treatment device according to claim 1, characterized in that: The following steps are involved: The aquaculture tail water stored in the water reservoir (4) is transported to the first filter pool (1), and the large particle impurities are primarily filtered through the first filter screen (2); During the filtering process, the first filter screen (2) is cleaned synchronously by the first cleaning member; The aquaculture tail water after primary filtration is transported to the second filtration tank (3), and the bait and feces residue are subjected to secondary filtration through the filter element; During the filtering process, the filter element is driven to move by the driving cleaning element, and the filter element is cleaned; The aquaculture tail water after secondary filtration is stored in the second filtration tank (3) and treated with drugs.

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