Aquaculture wastewater recycling filter treatment device

Abstract

The application provides an aquaculture sewage recycling and filtering treatment device, and particularly relates to the technical field of aquaculture sewage filtering treatment. The application comprises a primary filtering device, which can preliminarily screen the sewage, mainly screens out large-particle pollutants contained in the sewage, and further discharges the sewage to a secondary filtering device. The secondary filtering device comprises a separation cylinder, which can further purify the sewage, and an auxiliary baffle arranged outside, which can effectively reduce the water flow rate, so that the pollutants in the water body can quickly settle down and the interference on the cleanliness can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aquaculture wastewater filtration treatment, and particularly relates to a water product aquaculture wastewater circulating filtration treatment device. BACKGROUND

[0002] In the process of intensive aquaculture, due to large breeding density and large bait input, 70% to 80% of the bait enters the water body, and the residual bait and fish and shrimp excrement cause serious pollution to the water body and the sediment, etc., so that the aquaculture water body is eutrophicated, and the aquaculture is mostly in the form of large introduction and large discharge, which not only greatly consumes water resources, but also causes serious harm to the surrounding water body ecological environment. The existing aquaculture wastewater treatment adopts a filtration mode for treatment, and the filtering energy consumption of the traditional filtration device is high, a large amount of filtering resources are easily consumed, the filtering cost of the device is increased, and the practicability of the device is reduced.

[0003] The existing patent provides a certain solution, for example, a wastewater filtration method and device, which includes different sizes of filter media. According to one aspect of the present application, a wastewater filtration method and device are provided, which can stably and effectively operate by minimizing water head loss while removing organic matter and solids in large flow wastewater, and the present application realizes efficient filtration, but when treating large discharge wastewater, the problem that the medium cannot effectively filter pollutants due to too much wastewater pouring still exists, and the inventor believes that there is still much room for improvement. SUMMARY

[0004] In order to realize multi-stage separation filtration of aquaculture wastewater, and achieve the purposes of treating large flow aquaculture wastewater, rapid settlement of pollutants in the aquaculture wastewater and prolonging the service life of the screen disc, the present application provides a water product aquaculture wastewater circulating filtration treatment device, which comprises: a first filtration device, the first filtration device comprises a first filter cylinder, a first sewage pipeline extending from the inside of the first filter cylinder to the outside is arranged on the surface of the first filter cylinder, one end of the pipeline is connected with a second filtration device, characterized in that the second filtration device comprises a separation assembly, the separation assembly comprises a separation cylinder, a separation channel is connected with the output port below the separation cylinder, the separation channel is coiled on the surface of the separation cylinder, a filter screen is arranged in the separation channel, and a separation shell is arranged outside the separation channel.

[0005] Further, when the first filtration device is used, the aquaculture wastewater can be sucked into the first filter cylinder through the wastewater receiving pipeline, a large amount of wastewater is poured into the device and splashed on the screen disc, the surface of the screen disc is a ring-shaped mesh structure, so that the large-particle pollutants can be intercepted by the screen disc, and the wastewater further falls and flows out from the first sewage pipeline.

[0006] In this invention, a sewage receiving pipe is provided at the top of the first filter cylinder, a screen is provided inside the first filter cylinder, a rotating column is provided at the center of the screen, one end of the rotating column is connected to the output shaft of a motor, and a base plate is fixedly connected below the motor, and the base plate is snapped into the bottom of the first filter cylinder.

[0007] In this invention, a rotating plate is connected to one side of the rotating column, a brush is fixedly connected below the rotating plate, a conveyor belt is provided on the screen plate, and the surface of the screen plate is decorated.

[0008] Furthermore, the motor starts and drives the rotating column to rotate. The rotating plate fixedly connected to the rotating column can drive the brush fixedly connected to the lower end to sweep away the small particulate pollutants attached to the screen mesh. Some pollutants are attached to the surface of the brush, and can be scraped off by the scraper on the conveyor belt and discharged from the device.

[0009] In this invention, multiple auxiliary support components are provided on the side of the motor. The auxiliary support components include a support plate, a ball is hinged below the support plate, and a telescopic rod is connected below the ball. The telescopic rod is mainly composed of two columns and a base located at the bottom of the columns. The two columns that make up the telescopic rod are respectively provided with a first locking block and a second locking block on their sides.

[0010] Furthermore, the auxiliary support components support the screen disc, ensuring its stability when large amounts of wastewater are flushed into the primary filtration unit. These components also prevent excessive drop in screen disc height under impact, which could affect the movement of the rotating column. Multiple auxiliary support components are located at the bottom of the screen disc. During long-term wastewater filtration, the screen disc may deform due to impacts. The support plates within the auxiliary support components ensure that the supported area remains relatively stable, thus extending the screen disc's lifespan. In addition, the springs and telescopic rods within the auxiliary support components provide elastic support, further mitigating the impact of wastewater on the screen disc and preventing damage. The spring's return force also helps to shake off small particles and some adhering water droplets from the screen mesh.

[0011] In this invention, a spring is sleeved on the outside of the telescopic rod, a supporting shell is sleeved on the outside of the spring, an end cap is sleeved on the upper end of the supporting shell, the end cap is threaded on the outside, and a groove is provided in the middle of the supporting shell, where a fastening base is fitted.

[0012] Furthermore, after the screen is pressed, the screen deforms downward as a whole, and the spring and telescopic rod contract. Since the support plate and the telescopic rod are connected by a spherical hinge, when the support plate and the telescopic rod are simultaneously subjected to downward pressure, the support plate will inevitably rotate relative to the telescopic rod due to the uneven force on the screen surface caused by the sewage impact. This causes the screen to tilt slightly, which helps to prevent the pollutants that agglomerate when the brush cleans the surface from getting stuck in the mesh of the screen due to the pushing force of the brush.

[0013] In this invention, the secondary filtration device includes a filter box with an opening at the top. A partition plate is provided inside the filter box, a separation component is provided on one side of the partition plate, and a first filter plate and a second filter plate are fixedly connected to the other side of the partition plate. The second filter plate is located below the first filter plate, and a water outlet is provided below the second filter plate.

[0014] Furthermore, the wastewater filtered by the primary filtration device is discharged through the first sewage pipe. The output end of the first sewage pipe is fixedly connected to the third sewage pipe. A switch valve is installed on the outside of the input end of the third sewage pipe, which can be used to open and close the third sewage pipe. The output ends of the third sewage pipe and the second sewage pipe are both connected to the main sewage pipe. The wastewater flowing into the secondary filtration device first flows into the separation component. The separation component can further separate pollutants and other impurities in the wastewater. In addition, the separation component is equipped with disinfectant substances such as hypochlorous acid, which can further purify the wastewater.

[0015] In this invention, a cover plate is provided on the top of the filter box, and a plug is snapped onto the cover plate. A fourth sewage pipe is provided on the surface of the partition plate, and the output end of the pipe is located above the first filter plate. A second sewage pipe and a third sewage pipe are provided on the side of the filter box.

[0016] In this invention, a separation plate is fixedly connected to the upper end of the separation cylinder, an exhaust pipe is provided at the center of the separation plate, the input end of the exhaust pipe is located inside the separation cylinder, and an auxiliary baffle is fixedly connected to the lower part of the separation plate.

[0017] Furthermore, the water treated by the separation component can be sprayed onto the surface of the first filter plate through the fourth sewage pipe and discharged from the device through the bottom outlet. It's worth noting that the sewage flows into the separation component through the third sewage pipe. Due to the sewage's flow velocity and the circular inner wall of the separation cylinder, the sewage easily forms a swirling flow inside. This facilitates the trapping of residual pollutants and disinfectant particles by the filter screen when the sewage enters the separation channel. The sewage is then discharged from the outlet. In addition, the sewage's centrifugal force when entering the separation cylinder agitates the purified particles stacked at the bottom of the cylinder, suspending them in the water, improving purification efficiency, and preventing particle sedimentation. Furthermore, the gas generated during the purification process can be discharged from the exhaust pipe at the top of the separation cylinder.

[0018] It is worth mentioning that the separation cylinder adopts a two-layer structure. The water that is flushed into the device at the bottom flows into the upper part of the separation cylinder through the separation channel and is discharged from the outlet. The filter screen is set at the input end of the separation channel to prevent particulate matter from being carried into the channel and causing blockage.

[0019] In this invention, the main sewage pipe is connected to a second sewage pipe, the output end of the exhaust pipe passes through the filter box, the output end of the exhaust pipe is on the same side as the third sewage pipe, multiple water outlets are arranged around the side of the separation cylinder, the auxiliary baffle includes a swing plate, one end of the swing plate is hinged to the baffle, multiple mesh holes are arranged on the surface of the baffle, and the baffle is located outside the water outlet.

[0020] Furthermore, the auxiliary baffle is located outside the outlet. Since sewage always exits from the outlet along a certain trajectory, it can easily accumulate in a certain area inside the filter housing due to swirling currents, which is not conducive to sewage settling. Therefore, an auxiliary baffle is installed at the outlet so that the outwardly scattered sewage drips off the baffle surface, further reducing the amount of pollutants that may be carried out of the separation cylinder by the sewage and remain suspended in the water, which is conducive to the sedimentation of pollutants at the bottom. Moreover, since the swing plate and the baffle are hinged, the up-and-down swing of the baffle can effectively counteract the impact force brought by the sewage swirling current, reduce the fluidity of the water, promote the rapid settling of pollutants in the water, and reduce interference with the water cleanliness.

[0021] Compared with existing technologies, this invention achieves the following beneficial effects: the brush can sweep away small particulate pollutants attached to the screen mesh; the support plate in the auxiliary support assembly can ensure that the small area it supports is not easily deformed, thereby extending the service life of the screen. Furthermore, the auxiliary support assembly provides elastic support, which can further mitigate the impact of sewage hitting the screen, preventing damage to the auxiliary support assembly. Simultaneously, the counter-support force from the spring's return helps to shake off small particulate pollutants and some attached water droplets from the screen mesh; the separation cylinder further purifies the sewage, and the auxiliary baffle on the outer side can effectively reduce the water flow velocity, allowing pollutants in the water to settle quickly and reducing interference with cleanliness. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the aquaculture wastewater recycling and filtration treatment device involved in this invention.

[0023] Figure 2 This is a schematic diagram of the connection structure between the sieve disc and the motor involved in this invention;

[0024] Figure 3 This is a schematic diagram of the auxiliary support component structure involved in the present invention;

[0025] Figure 4This is a schematic diagram of the structure of the secondary filtration device involved in this invention;

[0026] Figure 5 This is a schematic diagram of the structure of the separate component involved in the present invention;

[0027] Figure 6 This is a schematic diagram of the separation component involved in the present invention without the auxiliary plate;

[0028] Figure 7 This is a schematic diagram of the separation cylinder and the connection structure of the separation channel involved in the present invention.

[0029] Explanation of reference numerals in the attached drawings: 1- Primary filtration device; 11- Wastewater receiving pipe; 12- First filter cartridge; 13- First sewage discharge pipe; 14- Base plate; 15- Motor; 16- Auxiliary support assembly; 161- Support plate; 162- Sphere; 163- Telescopic rod; 164- End cap; 165- First locking block; 166- Spring; 167- Second locking block; 168- Fastening base; 169- Support shell; 17- Rotating column; 18- Screen plate; 181- Conveyor belt; 19- Rotating plate; 191- Brush; 2- Secondary filtration device; 21-Cover plate; 22-Divider plate; 23-Filter box; 24-First filter plate; 25-Second filter plate; 26-Water outlet; 27-Plug; 28-Fourth sewage pipe; 29-Second sewage pipe; 3-Separation component; 31-Exhaust pipe; 32-Separation plate; 34-Separation cylinder; 341-Water outlet; 35-Separation shell; 36-Separation channel; 361-Filter screen; 37-Third sewage pipe; 38-Auxiliary baffle; 381-Swing plate; 382-Baffle; 39-Main sewage pipe. Detailed Implementation

[0030] Example 1:

[0031] refer to Figures 1-6 As shown, the present invention provides a wastewater recycling and filtration treatment device for aquaculture. The device includes: a primary filtration device 1, which includes a first filter cartridge 12. The surface of the first filter cartridge 12 is provided with a first sewage discharge pipe 13 extending from the inside of the first filter cartridge 12 outward. One end of the pipe is connected to a secondary filtration device 2. The secondary filtration device 2 is characterized in that it includes a separation component 3, which includes a separation cylinder 34. The lower outlet of the cylinder is connected to a separation channel 36. The separation channel 36 is coiled around the surface of the separation cylinder 34. A filter screen 361 is provided inside the separation channel 36. A separation shell 35 is sleeved on the outside of the separation channel 36.

[0032] refer to Figure 2As shown, when the primary filtration device 1 is in use, the aquaculture wastewater can be sucked into the first filter cartridge 12 by the wastewater receiving pipe 11. A large amount of wastewater rushes into the device and splashes onto the screen plate 18. The surface of the screen plate 18 is a ring-shaped mesh structure, so large particulate pollutants can be intercepted by the screen plate 18. The wastewater further falls and flows out from the first sewage pipe 13.

[0033] refer to Figures 1-2 As shown, in this invention, a sewage receiving pipe 11 is provided at the top of the first filter cylinder 12, a screen plate 18 is provided inside the first filter cylinder 12, a rotating column 17 is provided at the center of the screen plate 18, one end of the rotating column 17 is connected to the output shaft of the motor 15, and a base plate 14 is fixedly connected below the motor 15. The base plate 14 is snapped into the bottom of the first filter cylinder 12.

[0034] In this invention, a rotating plate 19 is connected to one side of the rotating column 17, a brush 191 is fixedly connected below the rotating plate 19, a conveyor belt 181 is provided on the screen plate 18, and the surface of the screen plate 18 is provided with...

[0035] Furthermore, the motor 15 starts and drives the rotating column 17 to rotate. The rotating plate 19 fixedly connected to the rotating column 17 can drive the brush 191 fixedly connected to the lower end to sweep away the small particulate pollutants attached to the mesh of the screen 18. Some pollutants are attached to the surface of the brush 191, and the pollutants on the surface of the brush can be scraped off by the scraper on the conveyor belt 181 and discharged from the device.

[0036] refer to Figures 2-3 As shown, in this invention, a plurality of auxiliary support components 16 are provided on the side of the motor 15. The auxiliary support components 16 include a support plate 161, a ball 162 is hinged below the support plate 161, and a telescopic rod 163 is connected below the ball 162. The telescopic rod 163 is mainly composed of two columns and a base located at the bottom of the columns. The two columns that make up the telescopic rod 163 are respectively provided with a first locking block 165 and a second locking block 167 on their sides.

[0037] refer to Figure 3As shown, the auxiliary support assembly 16 further supports the screen disc 18, ensuring its stability when a large amount of wastewater is flushed into the primary filtration device 1. Simultaneously, the auxiliary support assembly 16 ensures that the screen disc 18 does not drop excessively in height when subjected to impact, as a drop in screen disc 18 height can easily affect the movement of the rotating column 17. Furthermore, multiple auxiliary support assemblies 16 are located at the bottom of the screen disc 18. During long-term wastewater filtration, the screen disc 18 may deform due to impact. The support plate 161 within the auxiliary support assembly 16 ensures that the small area it supports is not easily deformed, thereby extending the service life of the screen disc 18. In addition, the structure of the spring 166 and telescopic rod 163 inside the auxiliary support assembly 16 provides elastic support force, further mitigating the impact of wastewater on the screen disc 18 and preventing damage to the auxiliary support assembly 16. Simultaneously, the counter-support force from the spring 166's return helps to shake off small particulate contaminants and some attached water droplets from the screen disc 18's mesh.

[0038] In this invention, a spring 166 is sleeved on the outside of the telescopic rod 163, a support shell 169 is sleeved on the outside of the spring 166, an end cap 164 is sleeved on the upper end of the support shell 169, the end cap 164 is threaded on the outside, and a groove is provided in the middle of the support shell 169, and a fastening base 168 is provided in the groove.

[0039] Furthermore, after the screen plate 18 is pressed, the screen plate 18 deforms downward as a whole, the spring 166 and the telescopic rod 163 contract, and since the support plate 161 and the telescopic rod 163 are connected by a ball hinge 162, when the support plate 161 and the telescopic rod 163 are simultaneously subjected to downward pressure, due to the uneven force on the surface of the screen plate 18 caused by the impact of sewage, the support plate 161 will inevitably rotate relative to the telescopic rod 163, thereby causing the screen plate 18 to tilt slightly. This helps to prevent the pollutants that agglomerate when the brush 191 cleans the surface from getting stuck in the mesh of the screen plate 18 due to the pushing action of the brush 191.

[0040] Example 2:

[0041] The difference between this embodiment and Embodiment 1 is that, referring to... Figure 4 As shown, in this invention, the secondary filtration device 2 includes a filter box 23 with an opening at the top. A partition plate 22 is provided inside the filter box 23. A separation component 3 is provided on one side of the partition plate 22. A first filter plate 24 and a second filter plate 25 are fixedly connected to the other side of the partition plate 22. The second filter plate 25 is located below the first filter plate 24, and a water outlet 26 is provided below the second filter plate 25.

[0042] Furthermore, the wastewater filtered by the primary filtration device 2 is discharged through the first sewage pipe 13. The output end of the first sewage pipe 13 is fixedly connected to the third sewage pipe 37. A switch valve is fitted on the outside of the input end of the third sewage pipe 37, which can be used to open and close the third sewage pipe 37. The output ends of the third sewage pipe 37 and the second sewage pipe 29 are both connected to the main sewage pipe 39. The wastewater flowing into the secondary filtration device 2 first flows into the separation component 3. The separation component 3 can further separate pollutants and other impurities in the wastewater. In addition, the separation component 3 is equipped with disinfectant substances such as hypochlorous acid, which can further purify the wastewater.

[0043] refer to Figures 4-5 - Figure 7 As shown, in this invention, a cover plate 21 is provided above the filter box 23, and a plug 27 is snapped onto the cover plate 21. A fourth sewage pipe 28 is provided on the surface of the partition plate 22. The output end of the pipe is located above the first filter plate 24. A second sewage pipe 29 and a third sewage pipe 37 are provided on the side of the filter box 23.

[0044] In this invention, a separation plate 32 is fixedly connected to the upper end of the separation cylinder 34, an exhaust pipe 31 is provided at the center of the separation plate 32, the input end of the exhaust pipe 31 is located inside the separation cylinder 34, and an auxiliary baffle 38 is fixedly connected to the lower part of the separation plate 32.

[0045] refer to Figures 5-6 As shown, the water treated by the separation component 3 can be sprayed onto the surface of the first filter plate 24 via the fourth sewage pipe 28 and discharged from the device through the bottom outlet 26. It is worth noting that the sewage flows into the separation component 3 through the third sewage pipe 37. Due to the sewage's certain flow velocity and the circular inner wall of the separation cylinder 34 within the separation component 3, the sewage easily forms a swirling flow inside. This facilitates the interception of residual pollutants and disinfection particles by the filter screen 361 when the sewage enters the separation channel 36. The sewage is then discharged from the outlet 341. Furthermore, the sewage's centrifugal force when entering the separation cylinder 34 agitates the purified particles stacked at the bottom of the separation cylinder 34, suspending them in the water, improving purification efficiency, and preventing particle sedimentation. The gas generated during the purification process can be discharged from the exhaust pipe 31 at the top of the separation cylinder 34.

[0046] refer to Figure 7 As shown, it is worth mentioning that the separation cylinder 34 adopts a layered structure. The water that is flushed into the device at the bottom flows into the upper part of the separation cylinder 34 through the separation channel 36 and is discharged from the outlet 341. The filter screen 361 is set at the input end of the separation channel 36 to prevent particulate matter from being carried into the channel and causing blockage.

[0047] In this invention, the main drain pipe 39 is connected to the second drain pipe 29, the output end of the exhaust pipe 31 passes through the filter box 23, the output end of the exhaust pipe 31 is on the same side as the third drain pipe 37, the side of the separation cylinder 34 is surrounded by multiple water outlets 341, the auxiliary baffle 38 includes a swing plate 381, one end of the swing plate 381 is hinged to a baffle 382, ​​the surface of the baffle 382 is provided with multiple mesh holes, and the baffle 382 is located outside the water outlet 341.

[0048] refer to Figure 5 As shown, further, the auxiliary baffle 38 is set outside the outlet 341. Since sewage always exits from the outlet 341 along a certain trajectory, it is easy for sewage to accumulate in a certain place inside the filter box 23 in a swirling manner, which is not conducive to sewage sedimentation. Therefore, the auxiliary baffle 38 is set at the outlet 341. In this way, the sewage scattered outward drips from the surface of the baffle 382, ​​further reducing the pollutants that may be carried out of the separation cylinder 34 by the sewage and suspended in the water, which is conducive to the sedimentation of pollutants at the bottom. Moreover, since the swing plate 381 and the baffle 382 are hinged, the up and down swing of the baffle 382 can effectively counteract the impact force brought by the sewage swirling, reduce the fluidity of the water, promote the rapid sedimentation of pollutants in the water, and reduce the interference with the cleanliness of the water.

[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. Aquaculture wastewater recycling and filtration treatment device, comprising: A primary filtration device (1) includes a first filter cartridge (12), and a first sewage pipe (13) extending from the inside of the first filter cartridge (12) to the outside is provided on the surface of the first filter cartridge (12). One end of the pipe is connected to a secondary filtration device (2). The secondary filtration device (2) includes a separation component (3), which includes a separation cylinder (34). The lower outlet of the cylinder is connected to a separation channel (36). The separation channel (36) is coiled around the surface of the separation cylinder (34). A filter screen (361) is provided inside the separation channel (36). A separation shell (35) is fitted on the outside of the separation channel (36). The first filter cylinder (12) is provided with a sewage receiving pipe (11) at the top. The first filter cylinder (12) is provided with a screen plate (18). The screen plate (18) is provided with a rotating column (17) at the center. One end of the rotating column (17) is connected to the output shaft of a motor (15). A base plate (14) is fixedly connected below the motor (15). The base plate (14) is snapped into the bottom of the first filter cylinder (12). A rotating plate (19) is connected to one side of the rotating column (17), and a brush (191) is fixedly connected below the rotating plate (19). A conveyor belt (181) is provided on the screen (18), and the surface of the screen (18) is provided with; The first sewage pipe (13) is fixedly connected to a third sewage pipe (37) at one end. The output end of the third sewage pipe (37) is fixedly connected to a main sewage pipe (39). The upper end of the separation cylinder (34) is fixedly connected to a separation plate (32). An exhaust pipe (31) is provided in the center of the separation plate (32). The input end of the exhaust pipe (31) is located inside the separation cylinder (34). An auxiliary baffle (38) is fixedly connected below the separation plate (32). The separation cylinder (34) adopts a layered structure. Multiple water outlets (341) are arranged around the side of the separation cylinder (34). The water that is flushed into the device below flows into the top of the separation cylinder (34) through the separation channel (36) and is discharged from the water outlets (341). The filter screen (361) is set at the input end of the separation channel (36).

2. The aquaculture wastewater recycling and filtration treatment device according to claim 1, characterized in that, Multiple auxiliary support components (16) are provided on the side of the motor (15). The auxiliary support components (16) include a support plate (161). A ball (162) is hinged below the support plate (161). A telescopic rod (163) is connected below the ball (162). The telescopic rod (163) is mainly composed of two columns and a base located at the bottom of the columns. The two columns that make up the telescopic rod (163) are respectively provided with a first locking block (165) and a second locking block (167) on their sides.

3. The aquaculture wastewater recycling and filtration treatment device according to claim 2, characterized in that, A spring (166) is fitted on the outside of the telescopic rod (163), and a support shell (169) is fitted on the outside of the spring (166). An end cap (164) is fitted on the upper end of the support shell (169), and the end cap (164) is threaded on the outside. A groove is provided in the middle of the support shell (169), and a fastening base (168) is fitted in the groove.

4. The aquaculture wastewater recycling and filtration treatment device according to claim 1, characterized in that, The secondary filtration device (2) includes a filter box (23) with an opening at the top. A partition plate (22) is provided inside the filter box (23). The separation component (3) is located on one side of the partition plate (22). A first filter plate (24) and a second filter plate (25) are fixedly connected to the other side of the partition plate (22). The second filter plate (25) is located below the first filter plate (24), and a water outlet hole (26) is provided below the second filter plate (25).

5. The aquaculture wastewater recycling and filtration treatment device according to claim 4, characterized in that, A cover plate (21) is provided on the top of the filter box (23), and a plug (27) is snapped on the cover plate (21). A fourth sewage pipe (28) is provided on the surface of the partition plate (22), and the output end of the pipe is located above the first filter plate (24). A second sewage pipe (29) and a third sewage pipe (37) are provided on the side of the filter box (23).

6. The aquaculture wastewater recycling and filtration treatment device according to claim 1, characterized in that, The main sewage pipe (39) is connected to the second sewage pipe (29). The output end of the exhaust pipe (31) passes through the filter box (23). The output end of the exhaust pipe (31) is on the same side as the third sewage pipe (37). The side of the separation cylinder (34) is surrounded by multiple water outlets (341). The auxiliary baffle (38) includes a swing plate (381). One end of the swing plate (381) is hinged to a baffle (382). The surface of the baffle (382) is provided with multiple mesh holes. The baffle (382) is located outside the water outlet (341).

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