A wastewater recycling and filtration device for shrimp larvae farming

Abstract

The present application relates to wastewater recycling filter equipment technical field, specifically to a kind of wastewater recycling filter equipment for fry culture, including sediment cabin, water delivery device, biological filter cabin and disinfection pool, water delivery device for conveying wastewater into sediment cabin is installed on sediment cabin;Sediment cabin, biological filter cabin and disinfection pool are sequentially communicated;Further comprising: processing mechanism, which is arranged in sediment cabin;Filtering mechanism is installed on processing mechanism, and filtering wastewater is filtered along with processing mechanism in sediment cabin rises and falls;Processing mechanism includes trigger assembly, plugging assembly, rotating assembly, threaded rod, closure assembly, driving device, lifting part and stirring vane.The present application drives stirring vane on circular pipe to rotate in sludge by releasing the elasticity of coil spring, sludge is stirred loose, wastewater and sludge are separated after each settlement is completed, then loose sludge is discharged from pipe two and pipe three, so that the cleaning efficiency of sludge is improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater recycling and filtration equipment, specifically to a wastewater recycling and filtration equipment for shrimp larvae farming. Background Technology

[0002] A large amount of wastewater is generated during shrimp larvae farming. This wastewater often contains feed residue, shrimp larvae excrement, and mud and other debris. In order to save water resources, wastewater circulation and filtration equipment is used to circulate and filter the wastewater through an equalization tank, sedimentation tank, biological filter, and disinfection tank.

[0003] Chinese invention application CN119461742B discloses a wastewater treatment device with multi-stage filtration function, relating to the field of wastewater treatment technology. The wastewater treatment device includes a filtration chamber, an equalization chamber, a sedimentation chamber, a dosing tank, a detection mechanism, and a conveying mechanism. The aforementioned prior art uses the conveying mechanism to transport the treated wastewater to the equalization chamber for chemical precipitation treatment, so that the metal ions in the wastewater are converted into insoluble precipitates. The treated wastewater finally flows into the sedimentation chamber for natural settling, thereby removing the metal ions from the wastewater.

[0004] However, when the wastewater is in the sedimentation tank, the feed residue, shrimp larvae excrement, and mud and other debris in the wastewater will settle to the bottom and become sludge. As the number of sedimentation cycles increases, the amount of sludge in the sedimentation tank will increase. At this point, it is necessary to empty the wastewater in the sedimentation tank and then remove the sludge. Since the wastewater circulation filtration is a multi-stage circulation filtration consisting of an equalization tank, a sedimentation tank, a biological filter, and a disinfection tank, the efficiency of the entire multi-stage circulation filtration will be affected when the sedimentation tank is not used. Summary of the Invention

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a wastewater recycling and filtration device for shrimp larvae farming.

[0006] The technical solution of this invention: A wastewater circulation and filtration device for shrimp larvae farming, comprising a sedimentation tank, a water conveying device, a biological filter tank, and a disinfection tank, wherein a water conveying device for conveying wastewater into the sedimentation tank is installed on the sedimentation tank; the sedimentation tank, the biological filter tank, and the disinfection tank are connected in sequence; further comprising:

[0007] The processing unit is located inside the sedimentation tank;

[0008] The filtration mechanism is installed on the treatment mechanism and filters the wastewater as the treatment mechanism moves up and down in the sedimentation tank.

[0009] The treatment mechanism includes a triggering component, a blocking component, a rotating component, a threaded rod, a closing component, a drive unit, a lifting section, and stirring blades. The drive unit is installed outside the sedimentation chamber, and the lifting section is slidably connected inside the sedimentation chamber and connected to the output shaft of the drive unit. The blocking component, used to completely close the lifting section, is installed inside the lifting section. The rotating component is installed on the lifting section, and the stirring blades are installed on the rotating component. The threaded rod is installed on the sedimentation chamber and threadedly engages with the rotating component, used for the stirring blades to rotate in the sludge. The bottom of the sedimentation chamber is installed with a closing component to block the sludge. The triggering component is installed inside the sedimentation chamber to trigger the blocking component. After the wastewater settles to the bottom, the lifting section descends, the threaded rod drives the rotating component to rotate and accumulate elastic potential energy, the blocking component closes the lifting section, completely separating the wastewater and sludge, and then the closing component opens. The sludge is then dispersed by the stirring blades and discharged from the closing component. The wastewater enters the biological filter chamber, where dissolved organic matter is degraded by microorganisms, and then enters the disinfection tank for ultraviolet disinfection to complete multi-stage filtration.

[0010] Preferably, the blocking assembly includes a spring, a rod, and a blocking rod;

[0011] One end of spring one is installed inside the lifting part, and the other end is connected to rod one. Rod one is slidably connected inside the lifting part. Spring one is sleeved on the outer periphery of rod one. Multiple blocking rods for closing the lifting part are installed on rod one.

[0012] Preferably, the rotating assembly includes a cylinder, a coil spring, a round tube, and a threaded ring;

[0013] A cylindrical tube is installed on the lifting unit, and a coil spring is installed inside it. A cylindrical tube is installed at the center of the coil spring. The bottom end of the cylindrical tube passes through the lifting unit and is located inside the sedimentation tank. A threaded ring is connected inside the cylindrical tube, and the threaded ring is threadedly engaged with the threaded rod.

[0014] Preferably, the closure assembly includes a sludge chamber, pipe two, pipe three, elastic element one, a blocking plate, and a protective cylinder one;

[0015] A sludge chamber for collecting sludge is installed at the bottom of the sedimentation chamber. Pipe 2 is installed at the bottom of the sludge chamber and is connected to pipe 3. An elastic element 1 is installed inside pipe 3. A blocking plate is installed at the top of the elastic element 1 and is inserted into pipe 2. A protective cylinder 1 is installed at the bottom of the blocking plate and is fitted around the outer periphery of the elastic element 1. When the rotating assembly descends to the bottom, it pushes the blocking plate downwards, and the sludge in the sludge chamber cavity is discharged from pipes 2 and 3.

[0016] Preferably, the triggering component includes a ramp block and a reset block;

[0017] The inclined block is connected to the blocking assembly, and the reset block is installed on the inner wall of the sedimentation chamber and located on the moving path of the inclined block.

[0018] Preferably, the filtration mechanism includes a secondary filter plate, a primary filter plate, a cleaning port, a water outlet assembly, and a cleaning assembly;

[0019] Multiple secondary filter plates are installed sequentially on the upper side of the lifting unit, and multiple primary filter plates are installed sequentially at the bottom of the lifting unit. Multiple cleaning holes are opened at the bottom of the lifting unit, and the multiple cleaning holes and multiple primary filter plates are arranged alternately. The lifting unit descends and passes through the primary filter plates for the first filtration, and then passes through the secondary filter plates for filtration.

[0020] Preferably, the cleaning assembly includes a cone block, an elastic element two, a scraper, and a rod two;

[0021] One end of the elastic element two is installed on the lifting part. Multiple scrapers are provided and multiple scrapers are installed side by side on the rod two. The elastic element two is connected to the scrapers. A conical block for knocking the scrapers to clean the primary filter plate is installed on the round tube.

[0022] Preferably, the water outlet assembly includes an elastic element three, a water-blocking plate, a protective cylinder two, and a pipe one;

[0023] The two ends of pipe one are connected to the sedimentation chamber and the biological filter chamber, respectively; one end of elastic component three is installed on the inner wall of the sedimentation chamber, and the other end is connected to the water blocking plate. The bottom end of the water blocking plate is connected to the protective cylinder two for protecting elastic component three. The protective cylinder two is sleeved on the outer periphery of elastic component three.

[0024] Preferably, the biofilter chamber is equipped with a microbial storage and dispensing device, the output end of which is located at the bottom of the inner cavity of the biofilter chamber.

[0025] Compared with the prior art, the above-mentioned technical solution of the present invention has the following beneficial technical effects:

[0026] After the wastewater settles inside the sedimentation chamber, the drive device is activated to lower plate one. As the circular tube descends along the threaded rod, the threaded engagement between the threaded ring and the threaded rod causes the circular tube to rotate, which in turn causes the coil spring to contract and accumulate elastic potential energy inside the cylinder. At this point, the wastewater inside the sedimentation chamber is filtered once by the primary filter plate, and then filtered a second time by the secondary filter plate. The wastewater that has been filtered twice rises above plate one, thus achieving two filtrations of the wastewater in the sedimentation chamber when discharging the sludge at the bottom, further improving the wastewater circulation and filtration efficiency.

[0027] When the plate moves downward, the engagement of the threaded ring and the threaded rod drives the round tube to rotate. The rotation of the round tube causes the coil spring to contract and store force, and also drives the conical block to rotate. The protrusion of the conical block contacts the scraper, thereby driving the scraper to move. Then it separates from the scraper. At this time, the elasticity of the second elastic element drives the scraper to reset. When the scraper moves, it scrapes away the debris accumulated on the primary filter plate, ensuring that the primary filter plate will not be blocked.

[0028] When the plate moves to the bottom, the inclined block contacts the reset block, which in turn drives the blocking rod to move towards the primary filter plate. At this time, the blocking rod is located between the secondary filter plate and the primary filter plate, thereby scraping off the debris on the secondary filter plate. The scraped debris is discharged from the cleaning hole, thus cleaning the secondary filter plate.

[0029] Furthermore, the primary and secondary filter plates are blocked by the blocking rod, at which point the entire plate is completely closed, separating the sludge and wastewater. The round tube presses the blocking plate downwards, allowing the second and third pipes to connect, and the threaded ring separates from the threaded rod. At this point, the elasticity of the coil spring is released, causing the stirring blades on the round tube to rotate inside the sludge, loosening the sludge. This achieves the separation of wastewater and sludge after each settling, and then the loosened sludge is discharged from the second and third pipes, thereby improving the sludge cleaning efficiency. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the sedimentation chamber and biofilter chamber proposed in this invention;

[0032] Figure 3 This is a schematic diagram of the sludge chamber proposed in this invention;

[0033] Figure 4 This is a schematic diagram of the lifting part proposed in this invention;

[0034] Figure 5 The present invention proposes Figure 4 Enlarged view of point A in the middle;

[0035] Figure 6 This is a schematic diagram of the structure of the spring and rod proposed in this invention;

[0036] Figure 7 This is a schematic diagram of the circular tube and stirring blade proposed in this invention;

[0037] Figure 8 This is a schematic diagram of the cleaning hole opening proposed in this invention;

[0038] Figure 9 This is a schematic diagram of the threaded ring and threaded rod proposed in this invention.

[0039] Reference numerals: 1. Sedimentation chamber; 2. Pipe 1; 3. Biological filter chamber; 4. Dosing device; 5. Disinfection tank; 6. Water conveying device; 7. Drive device; 8. Lifting part; 9. Spring 1; 10. Rod 1; 11. Blocking rod; 12. Inclined block; 13. Cylinder; 14. Coil spring; 15. Circular pipe; 16. Stirring blade; 17. Threaded rod; 18. Threaded ring; 19. Sludge chamber; 20. Pipe 2; 21. Pipe 3; 22. Elastic component 1; 23. Blocking plate; 24. Protective cylinder 1; 25. Secondary filter plate; 26. Primary filter plate; 27. Cleaning hole; 28. Conical block; 29. ​​Elastic component 2; 30. Scraper; 31. Rod 2; 32. Elastic component 3; 33. Water blocking plate; 34. Protective cylinder 2; 35. Reset block. Detailed Implementation

[0040] Example 1, as Figures 1-9 As shown, the present invention proposes a wastewater recycling and filtration device for shrimp larvae farming, comprising a sedimentation chamber 1, a water conveying device 6, a treatment mechanism, a filtration mechanism, a biological filter chamber 3, and a disinfection tank 5. The water conveying device 6 for conveying wastewater into the sedimentation chamber 1 is installed on the sedimentation chamber 1; the sedimentation chamber 1, the biological filter chamber 3, and the disinfection tank 5 are connected in sequence; and further comprising:

[0041] The processing unit is located inside sedimentation chamber 1;

[0042] The filtration mechanism is installed on the treatment mechanism and filters the wastewater as the treatment mechanism moves up and down in the sedimentation chamber 1.

[0043] The treatment mechanism includes a triggering component, a blocking component, a rotating component, a threaded rod 17, a closing component, a drive device 7, a lifting part 8, and a stirring blade 16. The drive device 7 is installed outside the sedimentation chamber 1, and the lifting part 8 is slidably connected inside the sedimentation chamber 1 and connected to the output shaft of the drive device 7. The blocking component for completely closing the lifting part 8 is installed inside the lifting part 8. The rotating component is installed on the lifting part 8, and the stirring blade 16 is installed on the rotating component. The threaded rod 17 is installed on the sedimentation chamber 1 and threadedly engages with the rotating component for the stirring blade 16 to rotate in the sludge. The bottom end of the sedimentation chamber 1 is installed with a closing component for blocking the sludge. The triggering component is installed inside the sedimentation chamber 1 to trigger the blocking component. After the wastewater settles to the bottom, the lifting part 8 descends, the threaded rod 17 drives the rotating component to rotate and accumulate elastic potential energy, the blocking component closes the lifting part 8, completely separating the wastewater and sludge, the closing component opens, and the sludge is dispersed by the stirring blade 16 and discharged from the closing component. The wastewater enters the biological filter chamber 3 and undergoes microbial degradation of dissolved organic matter, and then enters the disinfection tank 5 for ultraviolet disinfection to complete multi-stage filtration.

[0044] The blocking assembly includes a spring 9, a rod 10, and a blocking rod 11;

[0045] One end of spring 9 is installed inside the lifting part 8, and the other end is connected to rod 10. Rod 10 is slidably connected inside the lifting part 8. Spring 9 is sleeved on the outer periphery of rod 10. Multiple blocking rods 11 for closing the lifting part 8 are installed on rod 10.

[0046] When rod 10 moves, it blocks the secondary filter plate 25 and the primary filter plate 26. At this time, the wastewater in the sedimentation chamber 1 and the sludge in the sludge chamber 19 are completely isolated by the lifting part 8. After isolation, the sludge in the sludge chamber 19 is discharged, while the wastewater above the lifting part 8 is discharged from pipe 2.

[0047] The rotating assembly includes a cylinder 13, a coil spring 14, a circular tube 15, and a threaded ring 18;

[0048] The cylinder 13 is installed on the lifting part 8, and a coil spring 14 is installed inside it. A round tube 15 is installed at the center of the coil spring 14. The bottom end of the round tube 15 passes through the lifting part 8 and is located in the inner cavity of the sedimentation tank 1. A threaded ring 18 is connected inside the round tube 15, and the threaded ring 18 is threadedly engaged with the threaded rod 17.

[0049] When the lifting part 8 drives the round tube 15 to descend, the engagement of the threaded ring 18 and the threaded rod 17 will cause the round tube 15 to rotate. When the lifting part 8 moves to the bottom, the inclined block 12 is squeezed by the reset block 35, and the threaded ring 18 separates from the threaded rod 17.

[0050] The closure assembly includes sludge chamber 19, pipe 20, pipe 3 21, elastic element 22, blocking plate 23, and protective cylinder 24;

[0051] A sludge chamber 19 for collecting sludge is installed at the bottom of the sedimentation chamber 1. Pipe 20 is installed at the bottom of the sludge chamber 19 and is connected to pipe 3 21. An elastic element 1 22 is installed inside pipe 3 21. A blocking plate 23 is installed at the top of the elastic element 1 22 and is inserted into pipe 20. A protective cylinder 24 is installed at the bottom of the blocking plate 23 and is fitted around the outer periphery of the elastic element 1 22. When the rotating assembly descends to the bottom, it pushes the blocking plate 23 downward and the sludge in the sludge chamber 19 is discharged from pipe 20 and pipe 3 21.

[0052] The elasticity of the first elastic element 22 causes the blocking plate 23 to be inserted into the second pipe 20, which blocks the sludge chamber 19. The sludge in the wastewater settles to the bottom of the sludge chamber 19. When the blocking plate 23 is pressed down, the second pipe 20 and the third pipe 21 are connected, allowing the loose sludge to be discharged from the second pipe 20 and the third pipe 21.

[0053] The triggering component includes a ramp block 12 and a reset block 35;

[0054] The inclined block 12 is connected to the blocking assembly, and the reset block 35 is installed on the inner wall of the sedimentation chamber 1 and located on the moving path of the inclined block 12.

[0055] The inclined surfaces of the inclined block 12 and the reset block 35 allow the inclined block 12 to be stably attached to the reset block 35, thereby pushing the inclined block 12 toward the blocking rod 11 through the reset block 35, which in turn causes the blocking rod 11 to move.

[0056] Example 2, as Figures 1-8 As shown, the wastewater recycling and filtration device for shrimp larvae farming proposed in this invention, compared with Embodiment 1, the filtration mechanism of this embodiment includes a secondary filter plate 25, a primary filter plate 26, a cleaning hole 27, a water outlet component and a cleaning component;

[0057] Multiple secondary filter plates 25 are sequentially installed on the upper side of the lifting part 8, and multiple primary filter plates 26 are sequentially installed at the bottom of the lifting part 8. Multiple cleaning holes 27 are opened at the bottom of the lifting part 8, and the multiple cleaning holes 27 and multiple primary filter plates 26 are arranged alternately. The lifting part 8 descends and passes through the primary filter plate 26 for the first filtration, and then passes through the secondary filter plate 25 for filtration.

[0058] While the lifting unit 8 descends to clean the sludge, it filters out floating debris and other non-sinking impurities in the wastewater, and then discharges these non-sinking floating debris along with the sludge inside the sludge chamber 19.

[0059] The cleaning assembly includes a cone block 28, an elastic element 29, a scraper 30, and a rod 31;

[0060] One end of the elastic element 29 is installed on the lifting part 8. Multiple scrapers 30 are provided, and multiple scrapers 30 are installed side by side on the rod 31. The elastic element 29 is connected to the scraper 30. A conical block 28 is installed on the round tube 15 for knocking the scraper 30 to clean the primary filter plate 26.

[0061] When the round tube 15 rotates, it drives the conical block 28 to rotate, and the conical block 28 drives the scraper 30 to move, thereby scraping the primary filter plate 26 through the scraper 30.

[0062] The water outlet assembly includes elastic element 32, water blocking plate 33, protective cylinder 2 34, and pipe 1 2;

[0063] The two ends of the pipe 1 2 are connected to the sedimentation chamber 1 and the biological filter chamber 3 respectively; one end of the elastic element 3 32 is installed on the inner wall of the sedimentation chamber 1, and the other end is connected to the water blocking plate 33. The bottom end of the water blocking plate 33 is connected to the protective cylinder 2 34 for protecting the elastic element 3 32. The protective cylinder 2 34 is sleeved on the outer periphery of the elastic element 3 32.

[0064] The water-blocking plate 33 is located at the connection between pipe 2 and sedimentation chamber 1. During the sedimentation process, the water-blocking plate 33 seals pipe 2. When the lifting part 8 descends, it presses the water-blocking plate 33 downward, thereby allowing the wastewater in the sedimentation chamber 1 to be discharged from pipe 2.

[0065] The biofilter chamber 3 is equipped with a microbial storage device 4, and the output end of the device 4 is located at the bottom of the inner cavity of the biofilter chamber 3.

[0066] Both elastic element 1 (22) and elastic element 3 (32) consist of a telescopic rod and a spring 2, with the spring 2 sleeved around the outer periphery of the telescopic rod.

[0067] In summary, in this invention, the wastewater input pipe is connected to the input end of the water conveying device 6, and then the wastewater is transported to the inner cavity of the sedimentation tank 1 for settling through the water conveying device 6.

[0068] During the settling process, sludge and other debris in the wastewater settle in the sludge chamber 19, while some lighter debris floats in the wastewater. After a specified time, the drive device 7 is activated to drive the lifting part 8 to descend inside the sedimentation chamber 1. The wastewater is first filtered through the primary filter plate 26, and then filtered a second time through the secondary filter plate 25. The wastewater after being filtered twice enters the upper part of the lifting part 8 inside the sedimentation chamber 1.

[0069] Furthermore, during the descent of the lifting section 8, the engagement of the threaded ring 18 with the threaded rod 17 drives the circular tube 15 to rotate. During the rotation of the circular tube 15, the coil spring 14 inside the cylinder 13 contracts and accumulates elastic potential energy. During the rotation of the circular tube 15, the conical block 28 rotates. The protrusion of the conical block 28 squeezes the scraper 30. After the protrusion of the conical block 28 separates from the scraper 30, the elasticity of the elastic element 29 drives the scraper 30 to reset. At this time, the scraper 30 scrapes away the debris accumulated on the primary filter plate 26, thereby preventing the debris from clogging the primary filter plate 26 and affecting the subsequent filtration efficiency. Furthermore, the multiple scrapers 30 set on the rod 21 clean all the primary filter plates 26.

[0070] When the lifting part 8 descends to the bottom, the inclined block 12 contacts the reset block 35 and is squeezed and moved by the reset block 35. The inclined block 12 drives the blocking rod 11 to move in the inner cavity of the lifting part 8. When the blocking rod 11 moves, the blocking rod 11 scrapes away the debris accumulated on the secondary filter plate 25. Then, the scraped debris is discharged from the cleaning hole 27, thereby cleaning the secondary filter plate 25 and preventing the secondary filter plate 25 from becoming clogged, which would affect subsequent use.

[0071] Furthermore, the blocking rod 11 is located between the primary filter plate 26 and the secondary filter plate 25, blocking the primary filter plate 26 and the secondary filter plate 25. At this time, the lifting part 8 is completely blocked, thereby isolating the wastewater in the sedimentation chamber 1 and the sludge in the sludge chamber 19. When the lifting part 8 descends, it pushes the water blocking plate 33 towards the elastic element 32. At this time, the filtered wastewater is discharged along the pipe 2.

[0072] At this time, the circular tube 15 pushes the blocking plate 23 in the inner cavity of the second tube 20 towards the elastic element 22, so that the blocking plate 23 leaves the inner cavity of the second tube 20, thereby making the second tube 20 and the third tube 21 connected, and the stirring blade 16 is located in the sludge in the inner cavity of the sludge chamber 19.

[0073] At the same time, the threaded ring 18 descends to its lowest point and separates from the threaded rod 17. At this time, the circular tube 15 loses the constraint of the threaded rod 17, causing the coil spring 14 to lose its constraint and release elastic potential energy to drive the stirring blade 16 on the circular tube 15 to rotate. Then, the stirring blade 16 stirs and loosens the sludge in the inner cavity of the sludge chamber 19. The stirred sludge is quickly discharged from the second pipe 20 and the third pipe 21. This achieves the dual-stage filtration of floating debris in the wastewater after each settling, followed by the isolation of wastewater and sludge, and the rapid discharge of sludge. This avoids the long time required for each sludge cleaning, which affects the overall circulation and filtration efficiency of the wastewater.

[0074] Subsequently, the drive device 7 drives the lifting unit 8 to rise over the connection between the sedimentation tank 1 and the water conveying device 6, and then the wastewater is transported to the sedimentation tank 1 through the water conveying device 6. The discharged wastewater enters the inner cavity of the biological filter chamber 3, and then the biological agent is delivered into the biological filter chamber 3 through the dosing device 4. After that, the wastewater in the inner cavity of the biological filter chamber 3 enters the disinfection pool 5 for disinfection treatment.

[0075] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A shrimp fry farming wastewater recycling filtering device, a sedimentation cabin (1), a water delivery device (6), a biological filter cabin (3) and a disinfection pool (5), the water delivery device (6) for delivering wastewater into the sedimentation cabin (1) is installed on the sedimentation cabin (1); the sedimentation cabin (1), the biological filter cabin (3) and the disinfection pool (5) are sequentially communicated; characterized in that, Also comprising: a processing mechanism arranged in the sedimentation cabin (1); a filtering mechanism mounted on the processing mechanism and filtering the wastewater as the processing mechanism is raised and lowered in the sedimentation cabin (1); the processing mechanism comprises a triggering assembly, a plugging assembly, a rotating assembly, a threaded rod (17), a closing assembly, a driving device (7), a lifting part (8) and stirring blades (16); the driving device (7) is mounted outside the sedimentation cabin (1), the lifting part (8) is slidingly connected in the sedimentation cabin (1) and connected with the output shaft of the driving device (7); the inner cavity of the lifting part (8) is provided with the plugging assembly for completely closing the lifting part (8); the rotating assembly is mounted on the lifting part (8), and the stirring blades (16) are mounted on the rotating assembly; the threaded rod (17) is mounted on the sedimentation cabin (1) and threadedly cooperates with the rotating assembly for rotating the stirring blades (16) in the sludge; the bottom end of the sedimentation cabin (1) is provided with the closing assembly for plugging the sludge; the triggering assembly is arranged in the sedimentation cabin (1) for triggering the plugging assembly; after the wastewater is settled, the lifting part (8) is lowered, the threaded rod (17) drives the rotating assembly to rotate and accumulate elastic potential energy, the plugging assembly closes the lifting part (8), the closing assembly is opened after the wastewater and the sludge are completely separated, the sludge is stirred by the stirring blades (16) and discharged from the closing assembly, the wastewater enters the biological filter cabin (3) and is degraded by microorganisms to dissolve the soluble organic matter, and then enters the disinfection tank (5) to be disinfected by ultraviolet rays to complete multi-stage filtration; one end of the spring (9) is mounted in the lifting part (8), and the other end is connected with a rod (10) which is slidingly connected in the lifting part (8); the spring (9) is sleeved on the outer periphery of the rod (10); a plurality of plugging rods (11) for closing the lifting part (8) are mounted on the rod (10); the rotating assembly comprises a cylinder (13), a coil spring (14), a circular tube (15) and a threaded ring (18); the cylinder (13) is mounted on the lifting part (8), the coil spring (14) is arranged in the cylinder (13), the circular tube (15) is arranged at the center of the coil spring (14), the bottom end of the circular tube (15) penetrates through the lifting part (8) and is located in the inner cavity of the sedimentation cabin (1), the threaded ring (18) is connected in the circular tube (15), and the threaded ring (18) threadedly cooperates with the threaded rod (17); the closing assembly comprises a sludge cabin (19), a pipe (20), a pipe (21), an elastic member (22), a plugging plate (23) and a protection cylinder (24); the bottom end of the sedimentation cabin (1) is provided with the sludge cabin (19) for collecting the sludge, the pipe (20) is mounted at the bottom end of the sludge cabin (19), and the pipe (20) is communicated with the pipe (21); the elastic member (22) is arranged in the pipe (21), the top end of the elastic member (22) is provided with the plugging plate (23), the plugging plate (23) is inserted in the pipe (20), the bottom end of the plugging plate (23) is provided with the protection cylinder (24), and the protection cylinder (24) is sleeved on the outer periphery of the elastic member (22); when the rotating assembly is lowered to the bottom end, the plugging plate (23) is pushed downward to open, and the sludge in the inner cavity of the sludge cabin (19) is discharged from the pipe (20) and the pipe (21); The trigger assembly comprises a slope block (12) and a reset block (35); The slope block (12) is connected to the plugging assembly, and the reset block (35) is installed on the inner wall of the sediment cabin (1) and located on the moving path of the slope block (12).

2. The wastewater circulating filter apparatus for shrimp larva culture according to claim 1, characterized in that, The filtering mechanism comprises secondary filtering plates (25), primary filtering plates (26), cleaning holes (27), a water outlet assembly and a cleaning assembly. A plurality of secondary filtering plates (25) are installed on the upper side of the lifting part (8) in sequence, a plurality of primary filtering plates (26) are installed on the bottom end of the lifting part (8) in sequence, a plurality of cleaning holes (27) are formed on the bottom end of the lifting part (8), and the plurality of cleaning holes (27) and the plurality of primary filtering plates (26) are staggered. The lifting part (8) is lowered to perform the first filtering through the primary filtering plates (26), and then filtered through the secondary filtering plates (25).

3. The wastewater circulating filter apparatus for shrimp larva culture according to claim 2, characterized in that, The cleaning assembly comprises a conical block (28), an elastic member two (29), a scraper (30) and a rod two (31). One end of the elastic member two (29) is installed on the lifting part (8), a plurality of scrapers (30) are provided, the plurality of scrapers (30) are installed on the rod two (31) in parallel, and the elastic member two (29) is connected with the scraper (30). The conical block (28) is installed on the circular tube (15) and used for knocking the scraper (30) to clean the primary filtering plate (26).

4. The wastewater circulating filter apparatus for shrimp larva culture according to claim 2, characterized in that, The water outlet assembly comprises an elastic member three (32), a water plugging plate (33), a protection cylinder two (34) and a pipe one (2). The two ends of the pipe one (2) are respectively communicated with the sediment cabin (1) and the biological filter cabin (3); one end of the elastic member three (32) is installed on the inner wall of the sediment cabin (1), and the other end is connected with the water plugging plate (33); the bottom end of the water plugging plate (33) is connected with the protection cylinder two (34) used for protecting the elastic member three (32), and the protection cylinder two (34) is sleeved on the outer periphery of the elastic member three (32).

5. The wastewater circulating filter apparatus for shrimp larva culture according to claim 1, characterized in that, The biological filter cabin (3) is installed with a delivery device (4) for storing microorganisms, and the output end of the delivery device (4) is located at the bottom end of the inner cavity of the biological filter cabin (3).

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