A three-dimensional ecological filtration device for recycling aquaculture wastewater

Abstract

This invention relates to the field of aquaculture wastewater treatment technology and discloses a three-dimensional ecological filtration device for recycling aquaculture wastewater. Side plates are fixedly installed on the middle of both sides of the packing box. Supporting springs are equidistantly installed at the top and bottom of the side plates. A sliding locking plate is connected to the end of each supporting spring away from the side plate. The sliding locking plate slides along a limiting groove, and one end of the limiting groove is embedded and engaged with a locking end plate. This invention, through the side plates, supporting springs, and sliding locking plate, in conjunction with the limiting groove, ensures a tight fit between the sliding locking plate and the limiting groove, with the locking end plate completing the final locking and positioning. This ensures a stable and reliable connection, preventing loosening due to vibration or water flow impact. Furthermore, the packing box can be disassembled separately, allowing for quick replacement of the internal packing without disassembling the entire machine, improving packing replacement efficiency and ensuring the filter media always maintains a good filtration state, thereby maintaining higher filtration accuracy and service life.

Description

Technical Field

[0001] This invention relates to the field of aquaculture wastewater treatment technology, specifically a three-dimensional ecological filtration device for recycling aquaculture wastewater. Background Technology

[0002] The three-dimensional ecological filtration device for recycling aquaculture wastewater is a core water treatment equipment based on the concept of ecological engineering design. By deploying it in the aquaculture wastewater treatment water unit, a multi-trophic-level biological system is constructed to achieve efficient purification and resource recycling of aquaculture wastewater. At present, the three-dimensional ecological filtration device mainly achieves physical, chemical and biological triple purification through the synergistic cooperation of substrate, plants and microorganisms. In existing aquaculture recirculating water treatment equipment, the packing material inside the central packing filter box is prone to clogging due to the continuous adhesion and accumulation of dirt during long-term use. This leads to increased resistance to water flow through the filter media, a continuous decrease in filtration flux, and a decline in filtration efficiency. Existing anti-clogging methods mostly employ whole-machine vibration or air-water backwashing, which are energy-intensive and cause significant impact on equipment connections. Furthermore, since existing packing boxes mostly use bolt-fixed or embedded snap-fit ​​structures, the disassembly and assembly process is cumbersome, the maintenance cycle is long, and there is a lack of elastic compensation. Under vibration conditions, the fit clearance is prone to widening, resulting in loosening and abnormal noise. As a result, operators often cannot replace the clumped filter media in time, further exacerbating the deterioration of the filtration effect and affecting the continuous filtration effect. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a three-dimensional ecological filtration device for recycling aquaculture wastewater, which solves the problems of easy clogging of the filter media box, rapid decline in filtration efficiency, and difficulty in replacing the filter media in current technologies.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a three-dimensional ecological filtration device for recycling aquaculture wastewater, comprising a pre-sedimentation tank and a central packing filter box. The central packing filter box is connected to one side of the pre-sedimentation tank. A partition plate is fixed vertically inside the central packing filter box, and a packing box is installed between adjacent partition plates. A limiting groove is provided on the partition plate inside the central packing filter box. Side plates are fixedly installed in the middle of both sides of the packing box. Support springs are installed at equal intervals at the top and bottom of the side plates. A sliding plate is connected to the end of the support spring away from the side plate. The sliding plate slides along the limiting groove, and a locking end plate is embedded in and locked at one end of the limiting groove. A drive frame is fixedly installed at the middle of the back of the packing box, and racks are provided on both sides of the inner wall of the drive frame. An installation plate is installed at the middle of the back of the middle packing filter box. A transmission gear is installed on the edge of the mounting plate corresponding to the drive frame, and a transmission belt is sleeved on the outer side of the transmission gear. A drive motor is installed on the edge of one set of transmission gears. A toothed gear is connected to the side end of the transmission gear located inside the drive frame. The toothed gear meshes with the rack on the edge of the drive frame.

[0005] As a preferred technical solution of the three-dimensional ecological filtration device for recycling aquaculture wastewater according to the present invention, an aeration tank is installed on one side of the central packing filter box, and an ecological purification tank is connected to one side of the aeration tank. The pre-sedimentation tank, the central packing filter box, the aeration tank, and the ecological purification tank are arranged along the water flow direction. A main water inlet pipe is connected to the top water inlet end on one side of the pre-sedimentation tank, and a reuse drainage pipe is connected to the bottom water outlet end on one side of the ecological purification tank. They are connected by a connecting water pipe. A lift pump is installed on the connecting water pipe between the central packing filter box and the aeration tank.

[0006] As a preferred technical solution of the three-dimensional ecological filtration device for recycling aquaculture wastewater according to the present invention, a planted floating bed is embedded in the inner side of the ecological purification pond, and floating-leaved plants are planted in the planted floating bed. A shielding door is hinged to the front edge of the central packing filter box, and a conical distribution box is installed at the outlet end of the connecting water pipe at the top of the central packing filter box.

[0007] As a preferred technical solution of the three-dimensional ecological filtration device for recycling aquaculture wastewater according to the present invention, the top and bottom of the packing box are equipped with permeable mesh frames, and the three sets of packing boxes inside the middle packing filter box from top to bottom are a coarse filter box, a fine filter box and an adsorption box, respectively, and the three sets of packing boxes are respectively filled with large-diameter slag filter media, medium-diameter quartz sand and small-diameter heavy garnet filter media.

[0008] As a preferred technical solution of the three-dimensional ecological filtration device for recycling aquaculture wastewater according to the present invention, the snap-fit ​​end plate limits and connects the sliding snap plate in the limiting groove. The cross-section of the sliding snap plate and the limiting groove is T-shaped. The sliding snap plate is tightly embedded in the limiting groove by the elastic support force of the supporting spring. The packing box is pulled out from the back of the middle packing filter box as a whole through the cooperation of the sliding snap plate and the limiting groove.

[0009] As a preferred technical solution of the three-dimensional ecological filtration device for recycling aquaculture wastewater according to the present invention, the central packing filter box is limited to the mounting plate through a limiting bracket on its back. The mounting plate is embedded in the limiting bracket and the mounting plate and the limiting bracket are connected by bolts. The drive motor is fixedly installed on the back of the mounting plate, and the transmission gear plate connected to the drive motor drive shaft is an active transmission plate. The transmission gear plate drives the toothed gear to rotate through the drive shaft, and the toothed gear drives the drive frame to reciprocate up and down sliding.

[0010] As a preferred technical solution of the three-dimensional ecological filtration device for recycling aquaculture wastewater according to the present invention, a water collection box is installed at the middle of the top of the inner side of the aeration and oxygenation tank. The water collection box is horizontally fixed to the inner wall of the aeration and oxygenation tank by the mounting bracket on its side. A direct flushing water pipe is connected to the middle of one side of the water collection box. An overflow pipe is connected to the middle of the back of the aeration and oxygenation tank at the same height as the bottom of the water collection box. A movable shaft is rotatably connected to the middle of the water collection box. Water impact blades are connected to the edge of the movable shaft at equal angles along the circumference. A vertical rod is connected to the bottom of the water impact blades, and an arc-shaped water deflector is connected to the bottom of the vertical rod.

[0011] As a preferred technical solution of the three-dimensional ecological filtration device for recycling aquaculture wastewater according to the present invention, a float valve is connected to one side of the overflow pipe, and the outlet end of the direct flushing water pipe is directly opposite the water-impacting blade. The water-impacting blade drives the vertical rod and the arc-shaped water-dispensing plate to rotate, and the arc-shaped water-dispensing plate rotates along the water surface in the aeration and oxygenation tank.

[0012] As a preferred technical solution of the three-dimensional ecological filtration device for recycling aquaculture wastewater according to the present invention, a hollow shaft is integrally connected to the bottom of the movable shaft, and the bottom of the hollow shaft is rotatably connected to the bottom of the aeration tank through a hollow shaft seat, and an air inlet pipe is connected to one side of the hollow shaft seat. The hollow shaft has branch air pipes connected to its side along the circumferential direction, and the ends of the branch air pipes are connected to the main aeration pipe. The edge of the main aeration pipe is evenly provided with micro-holes. The hollow shaft has multiple sets of branch air pipes and main aeration pipes arranged vertically along its side.

[0013] As a preferred technical solution of the three-dimensional ecological filtration device for recycling aquaculture wastewater according to the present invention, the main air intake pipe is connected to an external air injection device, the hollow shaft, hollow shaft seat, branch air pipe and aeration main pipe are internally connected, and the cross-section of the micropores is conical.

[0014] Compared with existing technologies, the present invention provides a three-dimensional ecological filtration device for recycling aquaculture wastewater, which has the following beneficial effects: 1. The side plates, support springs, and sliding plates of the packing box, along with the limiting grooves, allow for quick and easy installation of the packing box into the central packing filter box by pushing it in laterally. The support springs provide elastic support, ensuring a tight fit between the sliding plates and the limiting grooves. The locking end plate completes the final locking and positioning, ensuring a stable and reliable connection. This significantly improves the stability of the packing box installation, preventing loosening due to vibration or water flow impact. Furthermore, the packing box can be disassembled separately, allowing for quick replacement of the internal packing without disassembling the entire machine. This improves packing replacement efficiency, ensuring the filter media always maintains a good filtration condition, thereby maintaining higher filtration accuracy and service life. The mounting plate facilitates the installation of the transmission gear plate, transmission belt, and drive motor. The transmission gear plate drives the toothed gear to rotate. Based on the cooperation between the toothed gear and the drive frame, the toothed gear, under the action of the rack, drives the drive frame to reciprocate and slide at high frequency, simultaneously driving the packing box to rise and fall. Combined with the elastic deformation of the support spring, the packing box achieves a high-frequency micro-vibration effect, thereby causing the entire packing box to vibrate at high frequency. This high-frequency vibration continuously disperses the filter media inside the packing box, effectively preventing dirt from agglomerating on the surface of the filter media, keeping the filtration flux stable, reducing the problem of filtration effect attenuation caused by filter media clogging, and further improving the filtration efficiency and operational reliability of the packing box.

[0015] Furthermore, the mounting plate is installed via a limiting bracket, facilitating its disassembly, while the toothed gear can easily slide out from the drive frame, thereby achieving rapid separation of the transmission components and the packing box. This facilitates the sliding disassembly and maintenance of the packing box, further enhancing the overall maintainability of the equipment. In this way, under the condition of aquaculture wastewater filtration, the packing box has both reliable elastic guiding installation to meet the requirements of high-frequency vibration and anti-clogging, and supports rapid lateral pulling at the back to meet the requirements of convenient maintenance.

[0016] 2. By installing the water collection box inside the aeration and oxygenation tank and introducing pressurized water into the water collection box through the direct flushing water pipe, the water pressure efficiently impacts the water-impacting blades and drives them to rotate. This pure hydraulic drive method requires no external energy input and can efficiently convert the kinetic energy of the water flow into mechanical rotational energy. During the rotation of the water-impacting blades, the vertical rod and the arc-shaped water deflector plate are simultaneously driven to rotate. When the arc-shaped water deflector plate rotates, its arc surface contacts the water surface to create a deflecting disturbance, which can form a large area of ​​water splash effect on the water surface, significantly increasing the contact area between air and water and achieving efficient oxygenation of the water surface. Meanwhile, the overflow pipe is connected to the float valve, which can automatically control the water level in the aeration tank, keeping the arc-shaped water deflector plate within the effective driving range of the water flow. This plate continuously disturbs the water surface in the aeration tank, facilitating the reuse of the impact energy of the original water flow and achieving zero-energy operation in the aeration process. This significantly reduces operating costs. At the same time, the continuous rotation of the blades impacted by the water creates a continuous water flow circulation between the collection box and the pool, effectively improving the uniformity of dissolved oxygen in the water and achieving the goal of green, energy-saving, and efficient aeration.

[0017] 3. The hollow shaft is connected to the bottom of the movable shaft, which allows the movable shaft to drive the hollow shaft to rotate synchronously. The bottom of the hollow shaft is rotatably connected to the bottom of the aeration tank through a hollow shaft seat. This ensures the stable rotation of the hollow shaft and achieves a high degree of integration between mechanical transmission and gas delivery through the gas delivery channel formed by the hollow shaft. This avoids the structural complexity and sealing difficulties caused by the separate setting of the drive shaft and the gas distribution pipeline in traditional aeration equipment. At the same time, the rotation of the hollow shaft drives the gas distribution component to slowly stir, so that the bubbles formed by aeration can be evenly distributed in the water, further improving the dissolved oxygen efficiency. Furthermore, the air intake pipe guides the pressurized gas supplied by the external air supply equipment into the hollow shaft, facilitating centralized gas delivery. At the same time, multiple sets of branch air pipes and aeration main pipes are evenly arranged along the vertical and circumferential directions on the side of the hollow shaft, which can further distribute and deliver the gas inside the hollow shaft in multiple stages. The surface of the aeration main pipe is evenly covered with a large number of micropores, allowing the gas to be released quickly and evenly into the water inside the aeration tank in the form of tiny bubbles. This achieves uniform gas release, improves the uniformity of gas distribution in the aeration tank, avoids local hypoxia, and the release of a large number of tiny bubbles significantly increases the gas-liquid contact area, thereby improving the gas oxygenation efficiency. In addition, the slow stirring of the hollow shaft in the water and the water flow disturbance of the arc-shaped water-dispersing plate on the water surface create a synergistic effect, which simultaneously enhances the oxygenation effect from two dimensions: water surface disturbance and underwater air distribution, thus comprehensively improving the oxygenation efficiency and stability of the aeration and oxygenation tank. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the pre-sedimentation tank of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of the packing filter box in the middle of the present invention.

[0021] Figure 4 This is a schematic diagram of the structure of the stuffing box of the present invention.

[0022] Figure 5 This is a schematic diagram of the structure of the driver frame of the present invention.

[0023] Figure 6 This is a schematic diagram of the structure of the aeration and oxygenation tank of the present invention.

[0024] Figure 7 This is a schematic diagram of the water collection box of the present invention.

[0025] Figure 8 This is a schematic diagram of the aeration main pipe of the present invention.

[0026] In the diagram: 1. Pre-sedimentation tank; 2. Central packing filter box; 3. Aeration and oxygenation tank; 4. Ecological purification tank; 5. Main inlet pipe; 6. Reclaimed drainage pipe; 7. Connecting water pipe; 8. Lifting pump; 9. Planting floating bed; 10. Shielding door; 11. Conical distribution box; 12. Packing box; 13. Limiting slide groove; 14. Side plate; 15. Support spring; 16. Sliding plate; 17. Snap-fit ​​end plate; 18. Permeable mesh frame; 19. Drive frame; 20. Mounting plate ; 21. Limiting seat; 22. Transmission gear plate; 23. Transmission gear belt; 24. Drive motor; 25. Gear with missing tooth; 26. Rack; 27. Water collection box; 28. Direct flush water pipe; 29. ​​Mounting bracket; 30. Overflow pipe; 31. Movable shaft; 32. Water impact blade; 33. Vertical rod; 34. Arc-shaped water deflector; 35. Hollow shaft; 36. Hollow shaft seat; 37. Main air intake pipe; 38. Branch air pipe; 39. Main aeration pipe; 40. Micropores. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0028] In the description of this invention, it should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to or indirectly connected to the other element.

[0029] In the description of this invention, it should be noted that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0030] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] Example: Please refer to Figures 1-8 This invention provides the following technical solution: a three-dimensional ecological filtration device for recycling aquaculture wastewater, comprising a pre-sedimentation tank 1 and a central packing filter box 2. The central packing filter box 2 is connected to one side of the pre-sedimentation tank 1. An aeration tank 3 is installed on one side of the central packing filter box 2. An ecological purification tank 4 is connected to one side of the aeration tank 3. The pre-sedimentation tank 1, the central packing filter box 2, the aeration tank 3, and the ecological purification tank 4 are arranged along the water flow direction. A main water inlet pipe 5 is connected to the top inlet end of one side of the pre-sedimentation tank 1. A reused drainage pipe 6 is connected to the bottom outlet of one side of the pool 4, and they are connected by a connecting water pipe 7. A lift pump 8 is installed on the connecting water pipe 7 between the middle packing filter box 2 and the aeration and oxygenation pool 3. A planted floating bed 9 is embedded in the inner side of the ecological purification pool 4. Floating-leaved plants are planted in the planted floating bed 9. The biofilm on the surface of the floating-leaved plant stems degrades and denitrifies nitrogen. A shielding door 10 is hinged to the front edge of the middle packing filter box 2. A conical distribution box 11 is installed at the outlet of the connecting water pipe 7 at the top of the middle packing filter box 2. The middle packing filter box 2 has vertically fixed partition plates inside, and packing boxes 12 are installed between adjacent partition plates. Water-permeable mesh frames 18 are installed at the top and bottom of the packing boxes 12. The three sets of packing boxes 12 inside the middle packing filter box 2, from top to bottom, are a coarse filter box, a fine filter box, and an adsorption box. The filter media particle sizes inside the coarse filter box, fine filter box, and adsorption box are 6mm, 2.5mm, and 0.6mm, respectively. The three sets of packing boxes 12 are filled with large-diameter slag filter media, medium-diameter quartz sand, and small-diameter heavy garnet filter media, respectively. The large-diameter slag filter media traps larger suspended particles and organic debris in the water, the medium-diameter quartz sand removes fine suspended solids and some colloidal substances, and the small-diameter heavy garnet filter media removes dissolved substances. For the removal of pollutants or heavy metal ions, a limiting groove 13 is provided on the partition plate inside the middle of the packing box 2. Side plates 14 are fixedly installed on the middle of both sides of the packing box 12. Support springs 15 are installed at equal intervals on the top and bottom of the side plates 14. The support springs 15 are stainless steel compression springs with a wire diameter of 1.5mm, an outer diameter of 15mm, a free length of 80mm, a pre-compression of 10mm, and a stiffness coefficient of approximately 2.5N / mm. The support springs 15 are configured to provide elastic support force so that the sliding plate 16 is tightly fitted into the limiting groove 13. The support springs 15 and the packing box 12 form an elastic vibration system. Under the excitation of reciprocating lifting and sliding, forced vibration is generated, so that the packing box 12 obtains a high-frequency micro-amplitude vibration effect. The material box 12 has a total mass of 15kg and a reciprocating lifting amplitude of 8-12mm. The support spring 15 generates forced vibration of 5-8Hz at this excitation frequency, achieving high-frequency shaking of the filter material without structural collision. The end of the support spring 15 away from the side plate 14 is connected to a sliding plate 16. The sliding plate 16 slides along the limiting groove 13, and one end of the limiting groove 13 is embedded with a snap-fit ​​end plate 17. The snap-fit ​​end plate 17 is a pluggable T-shaped plug. The snap-fit ​​end plate 17 is detachably embedded in the end of the limiting groove 13 to prevent the sliding plate 16 from slipping out. The transverse flange of the snap-fit ​​end plate 17 is snapped into the flared groove at the end of the limiting groove 13, and the longitudinal flange abuts against the end face of the sliding plate 16 to prevent it from sliding along the limiting groove. When the slide groove 13 slips out, pull out the snap-fit ​​end plate 17 during disassembly to release the end limit of the sliding plate 16. Then the packing box 12 can be pulled out laterally from the back of the middle packing filter box 2. The snap-fit ​​end plate 17 limits and connects the sliding plate 16 in the limiting slide groove 13. The cross-section of the sliding plate 16 and the limiting slide groove 13 is T-shaped. The sliding plate 16 is tightly embedded in the limiting slide groove 13 by the elastic support force of the support spring 15. The packing box 12 is pulled out from the back of the middle packing filter box 2 as a whole through the cooperation of the sliding plate 16 and the limiting slide groove 13. The sliding plate 16 slides along the limiting slide groove 13 and is limited and fixed by the snap-fit ​​end plate 17, so that the packing box 12 can be pulled out and disassembled laterally from the back of the middle packing filter box 2. A drive frame 19 is fixedly installed at the middle of the back of the stuffing box 12. Both sides of the inner wall of the drive frame 19 are provided with racks 26. An installation plate 20 is installed at the middle of the back of the middle stuffing filter box 2. A transmission gear 22 is installed on the edge of the mounting plate 20 corresponding to the drive frame 19, and a transmission belt 23 is sleeved on the outer side of the transmission gear 22. A drive motor 24 is installed on the edge of one set of transmission gear 22, and the speed of the drive motor 24 is set to 60 rpm. A toothed gear 25 is connected to the side end of the transmission gear 22 located inside the drive frame 19. The toothed gear 25 is a gear disk with teeth only partially provided on the outer circumference. The teeth of the toothed gear 25 occupy 1 / 4 of the circumferential arc length. The toothed gear 25 meshes with the rack 26 on the edge of the drive frame 19. When the toothed gear 25 rotates, it alternately meshes with the racks 26 on both sides of the drive frame 19 to drive the packing box 12 to reciprocate up and down. The support spring 15 generates forced vibration under the inertial force of the packing box 12, so that the filter media obtains a high-frequency micro-amplitude shaking effect. The middle packing filter box 2 passes through its back. The limiting bracket 21 and the mounting plate 20 are connected in a limiting connection. The mounting plate 20 is embedded in the limiting bracket 21 and the mounting plate 20 and the limiting bracket 21 are connected by bolts. The drive motor 24 is fixedly installed on the back of the mounting plate 20. The transmission gear 22 connected to the transmission shaft of the drive motor 24 is the active transmission disc. The transmission gear 22 drives the toothed gear 25 to rotate through the transmission shaft. The toothed gear 25 drives the drive frame 19 to reciprocate up and down sliding. Under the drive of the drive motor 24, the stuffing box 12 reciprocates up and down sliding. The mounting plate 20 is embedded in the back of the middle stuffing filter box 2 through the limiting bracket 21. The toothed gear 25 is located inside the drive frame 19 and is meshed with the rack 26. When the mounting plate 20 is removed, the toothed gear 25 moves outward with the mounting plate 20 as a whole and disengages from the drive frame 19, realizing the rapid separation of the transmission mechanism from the stuffing box 12.

[0032] A water collection box 27 is installed at the top center of the inner side of the aeration and oxygenation tank 3. The water collection box 27 is horizontally fixed to the inner wall of the aeration and oxygenation tank 3 by the mounting bracket 29 on its side. A direct flushing water pipe 28 is connected to the middle of one side of the water collection box 27. An overflow pipe 30 is connected to the middle of the back of the aeration and oxygenation tank 3 at the same height as the bottom of the water collection box 27. A movable shaft 31 is rotatably connected to the middle of the water collection box 27. Water impact blades 32 are connected to the edge of the movable shaft 31 at equal angles along the circumference. A vertical rod 33 is connected to the bottom of the water impact blades 32, and an arc-shaped water deflector 34 is connected to the bottom of the vertical rod 33. A float valve is connected to one side of the overflow pipe 30, and the outlet of the direct flush pipe 28 is directly opposite the water impact blades. The blade 32 drives its rotation. The blade 32, which is impacted by water, drives the vertical rod 33 and the arc-shaped water-dispensing plate 34 to rotate. The arc-shaped water-dispensing plate 34 rotates along the water surface in the aeration and oxygenation tank 3, which facilitates the control of the water level in the aeration and oxygenation tank 3 through the overflow pipe 30 and the float valve. By controlling the water level in the aeration and oxygenation tank 3, the arc-shaped water-dispensing plate 34 is kept at an effective dispensing height on the water surface. At the same time, the arc-shaped water-dispensing plate 34 adheres to the water surface and performs dispensing disturbance, which facilitates oxygenation of the water surface.

[0033] The bottom of the movable shaft 31 is integrally connected to a hollow shaft rod 35. The bottom of the hollow shaft rod 35 is rotatably connected to the bottom of the aeration tank 3 through a hollow shaft seat 36, and an air inlet main pipe 37 is connected to one side of the hollow shaft seat 36. A branch air pipe 38 is connected to the side of the hollow shaft 35 along the circumferential direction. The end of the branch air pipe 38 is connected to the aeration main pipe 39. Microholes 40 are evenly opened on the edge of the aeration main pipe 39. Multiple sets of branch air pipes 38 and aeration main pipes 39 are arranged vertically on the side of the hollow shaft 35. The air inlet main pipe 37 is connected to the external air injection equipment. The hollow shaft 35, hollow shaft seat 36, branch air pipes 38 and aeration main pipe 39 are internally connected. The cross-section of the microholes 40 is conical, which facilitates the introduction of pressurized gas delivered by the external air supply equipment into the hollow shaft 35. At the same time, it facilitates the rapid and even distribution of gas in the aeration main pipe 39 to the aeration and oxygenation tank 3 through multiple microholes 40, thereby improving the aeration effect.

[0034] The working principle and usage process of this invention are as follows: Floating-leaved plants need to be planted on the floating bed 9 in the ecological purification pond 4. The reuse drain pipe 6 on one side of the ecological purification pond 4 is connected to the reused aquaculture pond. The air inlet pipe 37 at the bottom of the aeration and oxygenation pond 3 is connected to the external aeration equipment. After completing the preparation work, the aquaculture tailwater in the aquaculture pond is transported to the pre-sedimentation pond 1 through the water inlet pipe 5. The aquaculture tailwater is subjected to preliminary sedimentation treatment in the pre-sedimentation pond 1. The supernatant obtained by sedimentation is transported to the middle packing filter box 2 through the connecting water pipe 7. The tailwater is subjected to multi-stage layered filtration through the three sets of packing boxes 12 set in the middle packing filter box 2. During the filtration process of the packing box 12, the drive motor 24 is started, which drives the transmission gear disk 22 to rotate. The transmission gear belt 23 drives multiple sets of transmission gear disks 22 corresponding to the position of the packing box 12 to rotate synchronously. The transmission gear disk 22 drives the toothed gear 25 to rotate. Based on the cooperation between the toothed gear 25 and the drive frame 19 on the side of the packing box 12, the toothed gear 25 drives the drive frame 19 to reciprocate and slide at high frequency under the action of the rack 26. With the help of the support spring 15, the packing box 12 obtains a high frequency micro-amplitude vibration effect. When the toothed gear 25 rotates continuously, its teeth alternately mesh with the racks 26 on both sides of the drive frame 19, driving the packing box 12 to reciprocate and slide. At the same time, the support spring 15 generates forced vibration under the action of the inertial force of the packing box 12, so that the filter media obtains a high frequency micro-amplitude shaking effect. This achieves vibration treatment of the packing box 12, and the filter media filled inside is shaken by vibration to avoid the accumulation of dirt and reduce the filtration effect. When it is necessary to disassemble the stuffing box 12 to replace and clean the stuffing inside, the stuffing box 12 is provided with a side plate 14, a support spring 15 and a sliding plate 16 on its side. With the help of the limiting slide groove 13, the stuffing box 12 can be quickly installed into the middle stuffing filter box 2 by pushing it in laterally. Based on the elastic support of the support spring 15, combined with the snap-fit ​​end plate 17, the sliding plate 16 and the limiting slide groove 13 are tightly fitted to ensure a stable connection. In this way, the stuffing box 12 can be installed quickly and stably, and it is also convenient to disassemble the stuffing box 12 separately. The mounting plate 20 is installed via the limiting bracket 21, which facilitates its disassembly. The toothed gear 25 can be easily slid out from the drive frame 19, which facilitates the disassembly of the mounting plate 20 and the transmission components mounted on it. This facilitates the sliding and disassembly of the packing box 12, making it easier to replace the internal packing and ensuring that it has a higher filtration effect. When disassembling, first remove the connecting bolts between the mounting plate 20 and the limiting bracket 21, move the mounting plate 20 together with the toothed gear 25 backward by 50mm to separate it from the drive frame 19, and then slide the packing box 12 horizontally backward along the limiting slide groove 13 and pull it out. The disassembly time for a single packing box 12 does not exceed 3 minutes. After the tailwater is filtered by the middle packing filter box 2, it is transported to the direct flushing water pipe 28 through the connecting water pipe 7 and the lifting pump 8. The direct flushing water pipe 28 is connected to the collection box 27. The collection box 27 is installed inside the aeration and oxygenation tank 3 through the mounting bracket 29. The water pressure is impacted on the water impact blades 32 through the direct flushing water pipe 28, causing the water impact blades 32 to rotate and drive the movable shaft 31 inside the collection box 27 to rotate. Based on the water impact blades 32, the vertical rod 33 and the arc-shaped water deflector 34 are rotated simultaneously. When the arc-shaped water deflector 34 rotates, its bottom is attached to the water surface to agitate it, thus oxygenating the water. The overflow pipe 30 is connected to the float valve to control the water level in the aeration tank 3, so that the arc-shaped water deflector 34 can continuously agitate the water surface in the aeration tank 3 under the drive of the water flow, converting and utilizing the water pressure. This improves the aeration and oxygenation effect of the aeration tank 3 without the need for energy input. At the same time, when the movable shaft 31 rotates, it synchronously drives the hollow shaft 35 connected to the bottom of the movable shaft 31 to rotate, so that the movable shaft 31 can drive the hollow shaft 35 to rotate synchronously in the aeration tank 3. The bottom of the hollow shaft 35 is rotatably connected to the bottom of the aeration tank 3 through the hollow shaft seat 36, so that while the hollow shaft 35 rotates, it can also cooperate with the air inlet pipe 37 to introduce the pressurized gas delivered by the external air supply equipment into the hollow shaft 35, so as to realize the centralized delivery of gas. At this time, with the help of multiple sets of branch air pipes 38 and aeration main pipes 39 set on the side of the hollow shaft 35, the gas in the hollow shaft 35 is further diverted and transported. Multiple sets of branch air pipes 38 and aeration main pipes 39 are set along the vertical and circumferential directions of the hollow shaft 35, so as to realize the rapid and even distribution of the gas in the aeration main pipe 39 to the aeration and oxygenation tank 3 through multiple micropores 40, thereby further improving the aeration effect. Finally, the effluent treated by the aeration and oxygenation tank 3 is transported to the ecological purification tank 4 through the connecting water pipe 7. The biofilm on the surface of the floating-leaved plant stems in the ecological purification tank 4 degrades and denitrifies the nitrogen, thereby further treating the effluent and ensuring the quality of the effluent.

[0035] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A three-dimensional ecological filtration device for recycling aquaculture wastewater, comprising a pre-sedimentation tank (1) and a central packing filter box (2), characterized in that, The pre-sedimentation tank (1) is connected to a central packing filter box (2) on one side. A partition plate is fixed in the vertical direction inside the central packing filter box (2). A packing box (12) is installed between adjacent partition plates. A limiting groove (13) is provided on the partition plate inside the central packing filter box (2). Side plates (14) are fixedly installed in the middle of both sides of the packing box (12). Support springs (15) are installed at equal intervals at the top and bottom of the side plates (14). A sliding plate (16) is connected to the end of the support spring (15) away from the side plate (14). The sliding plate (16) slides along the limiting groove (13) and is guided and limited. A locking end plate (17) is embedded and locked at one end of the limiting groove (13). A drive frame (19) is fixedly installed at the middle back of the packing box (12), and racks (26) are provided on both sides of the inner wall of the drive frame (19). An installation plate (20) is installed at the middle back of the middle packing filter box (2). A transmission gear (22) is installed on the edge of the mounting plate (20) corresponding to the drive frame (19), and a transmission belt (23) is sleeved on the outer side of the transmission gear (22). A drive motor (24) is installed on the edge of one set of transmission gears (22). A toothed gear (25) is connected to the side end of the transmission gear (22) located inside the drive frame (19). The toothed gear (25) meshes with the rack (26) on the edge of the drive frame (19).

2. The three-dimensional ecological filtration device for recycling aquaculture wastewater according to claim 1, characterized in that, An aeration tank (3) is installed on one side of the central packing filter box (2), and an ecological purification tank (4) is connected to one side of the aeration tank (3). The pre-sedimentation tank (1), the central packing filter box (2), the aeration tank (3), and the ecological purification tank (4) are arranged along the direction of water flow. A main water inlet pipe (5) is connected to the top water inlet end on one side of the pre-sedimentation tank (1), and a reuse drainage pipe (6) is connected to the bottom water outlet end on one side of the ecological purification tank (4). They are connected by a connecting water pipe (7). A lift pump (8) is installed on the connecting water pipe (7) between the central packing filter box (2) and the aeration tank (3).

3. The three-dimensional ecological filtration device for recycling aquaculture wastewater according to claim 2, characterized in that, The inner side of the ecological purification pond (4) is embedded with a floating plant bed (9), which is planted with floating-leaved plants. The front side of the central packing filter box (2) is hinged with a shielding door (10), and the water outlet of the connecting water pipe (7) at the top of the central packing filter box (2) is equipped with a conical distribution box (11).

4. The three-dimensional ecological filtration device for recycling aquaculture wastewater according to claim 3, characterized in that, The top and bottom of the packing box (12) are equipped with permeable mesh frames (18), and the three sets of packing boxes (12) inside the middle packing filter box (2) from top to bottom are coarse filter box, fine filter box and adsorption box, respectively. The three sets of packing boxes (12) are filled with large-diameter slag filter material, medium-diameter quartz sand and small-diameter heavy garnet filter material, respectively.

5. The three-dimensional ecological filtration device for recycling aquaculture wastewater according to claim 1, characterized in that, The snap-fit ​​end plate (17) limits and connects the sliding plate (16) in the limiting groove (13). The cross-section of the sliding plate (16) and the limiting groove (13) is T-shaped. The sliding plate (16) is tightly embedded in the limiting groove (13) by the elastic support force of the support spring (15). The packing box (12) is pulled out from the back of the middle packing filter box (2) as a whole through the cooperation of the sliding plate (16) and the limiting groove (13).

6. The three-dimensional ecological filtration device for recycling aquaculture wastewater according to claim 1, characterized in that, The middle packing filter box (2) is connected to the mounting plate (20) through the limiting bracket (21) on its back. The mounting plate (20) is embedded in the limiting bracket (21), and the mounting plate (20) and the limiting bracket (21) are connected by bolts. The drive motor (24) is fixedly installed on the back of the mounting plate (20), and the transmission gear (22) connected to the drive shaft of the drive motor (24) is the active transmission disc. The transmission gear (22) drives the toothed gear (25) to rotate through the transmission shaft. The toothed gear (25) drives the drive frame (19) to reciprocate and slide.

7. A three-dimensional ecological filtration device for recycling aquaculture wastewater according to claim 1, characterized in that, A water collection box (27) is installed at the top center of the inner side of the aeration and oxygenation tank (3). The water collection box (27) is horizontally fixed to the inner wall of the aeration and oxygenation tank (3) by the mounting bracket (29) on its side. A direct flushing water pipe (28) is connected to the middle of one side of the water collection box (27). An overflow pipe (30) is connected to the middle of the back of the aeration and oxygenation tank (3) at the same height as the bottom surface of the water collection box (27). A movable shaft (31) is rotatably connected to the middle of the water collection box (27). Water impact blades (32) are connected to the edge of the movable shaft (31) at equal angles along the circumferential direction. A vertical rod (33) is connected to the bottom of the water impact blades (32), and an arc-shaped water deflector (34) is connected to the bottom of the vertical rod (33).

8. A three-dimensional ecological filtration device for recycling aquaculture wastewater according to claim 7, characterized in that, A float valve is connected to one side of the overflow pipe (30), and the outlet of the direct flush pipe (28) is directly opposite the water impact blade (32). The water impact blade (32) drives the vertical rod (33) and the arc-shaped water deflector (34) to rotate. The arc-shaped water deflector (34) rotates along the water surface in the aeration and oxygenation tank (3).

9. A three-dimensional ecological filtration device for recycling aquaculture wastewater according to claim 7, characterized in that, The bottom of the movable shaft (31) is integrally connected to a hollow shaft rod (35), and the bottom of the hollow shaft rod (35) is rotatably connected to the bottom of the aeration tank (3) through a hollow shaft seat (36), and an air inlet pipe (37) is connected to one side of the hollow shaft seat (36). The hollow shaft (35) has a branch air pipe (38) connected to its side along the circumferential direction. The end of the branch air pipe (38) is connected to the aeration main pipe (39). The aeration main pipe (39) has micro holes (40) evenly opened on its side. The hollow shaft (35) has multiple sets of branch air pipes (38) and aeration main pipes (39) arranged vertically on its side.

10. A three-dimensional ecological filtration device for recycling aquaculture wastewater according to claim 9, characterized in that, The main air intake pipe (37) is connected to an external air injection device. The hollow shaft (35), hollow shaft seat (36), branch air pipe (38) and aeration main pipe (39) are internally connected. The cross-section of the micropore (40) is conical.

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