An airlift type physical and chemical treatment device for aquaculture

Abstract

The present invention discloses an airlift type physical and chemical treatment device for aquaculture, which belongs to the technical field of aquaculture, and comprises a breeding pond, a sewage filter and a water float arranged in sequence, wherein a first airlift component is arranged around the breeding pond, any of the first airlift components comprises an air outlet pipe and an air flow plate, any of the air outlet pipes is connected to a plurality of PV tubes, and air stones are arranged in an array on the PV tubes, the breeding pond is connected to the sewage filter with a sewage pipe, the sewage filter comprises an outer shell, an inner cylinder and a filter screen, an auxiliary sinker is arranged at the bottom of the outer shell, the sewage filter is connected to the bottom of the water float with a return pipe, the water float comprises a plurality of slow flow columns and filter layers and filter plates arranged symmetrically up and down, and the water float is connected to a water inlet pipe located above the inside of the breeding pond. The present invention realizes the filtration and circulation of breeding water through the sewage filter and the water float, and increases the oxygen content of the water in the breeding pond through the first airlift component, improves the life activity of the breeding organisms, and improves the economic value.

Description

Technical Field

[0001] The invention belongs to the technical field of aquaculture, and in particular relates to an airlift type physical and chemical treatment device for aquaculture. Background Art

[0002] With the rapid development of intensive farming of Penaeus vannamei, high-density farming inevitably increases the risk of disease outbreaks, so water quality control is crucial. Various studies have shown that biofloc is the core of the effective operation of zero-water exchange shrimp farming, and it plays an important role in water quality control, nutrient circulation, and healthy growth of shrimp. Establishing and maintaining stable bioflocs requires efficient oxygenation technology to keep the bottom of the breeding pond suspended and provide soft gas. At present, the air lift system of shrimp breeding ponds cannot homogenize the water, and the mechanization degree of breeding ponds is relatively low. Therefore, this patent is very suitable for barrel-shaped shrimp biofloc farming.

[0003] The US patent, publication number US20150373954A1, discloses a circulating aquaculture water treatment device, which includes an aquaculture tank, any aquaculture tank includes a plurality of connecting plate units and a water flow cup; an aeration unit, the aeration unit includes a plurality of air supply pipes for aerating the water; a return water unit, the return water unit includes a pump connected to one end of the water pipe, the outlet of the pump is connected to the return water pipe, and the return water pipe extends to each aquaculture pool to realize water circulation; any aquaculture tank also includes a nitrification reaction chamber and a holding chamber. The invention provides sufficient dissolved oxygen in each aquaculture tank, and allows the remaining feed and excrement to flow upward and be discharged through the flow cup, thereby improving the aquaculture density and survival rate, and multiple aquaculture tanks can be quickly assembled through the connecting plate unit, which is easy to carry and clean; the nitrification reaction chamber removes ammonium, nitrate and nitrite in the water, improving the survival rate of aquatic organisms. There is room for improvement in the following technical aspects of this invention: the excrement and leftover bait in the aquaculture tank float on the water surface, which will inhibit the exchange of external airflow with the water body and easily cause the water body to stink; when oxygenating and aerating the water body in the aquaculture tank, it is easy to disturb the dirt suspended in the water, which is not conducive to the discharge of the dirt. Summary of the invention

[0004] The object of the present invention is to provide an airlift type physical and chemical treatment device for aquaculture, which increases the oxygen content of aquaculture water by aeration, and performs multiple filtration and circulation on the aquaculture water to improve the vitality of aquatic organisms.

[0005] The technical solution adopted by the present invention to achieve the above-mentioned purpose is:

[0006] An airlift type physical and chemical treatment device for aquaculture comprises: a breeding pond, a plurality of first airlift components are arranged around the inner wall of the breeding pond, a sewage filter and a water device are arranged on the side of the breeding pond, any first airlift component comprises an air outlet pipe, a plurality of PV tubes are connected to the side of the air outlet pipe, a plurality of PV tubes on the same side are parallel to each other and inclined relative to the air outlet pipe, a plurality of air stones are connected upward to any PV tube, the air outlet pipe is connected to an air supply pipe, a plurality of air supply pipes are connected to the same air pump through pipelines, an inclined airflow plate is fixed above the air outlet pipe, an extension plate is connected to the side of the airflow plate, a buffer cavity matching the number and corresponding to the position of the first airlift components is opened on the inner wall of the breeding pond, the extension plate is located in the buffer cavity, springs are arranged between the extension plate and the upper and lower walls of the buffer cavity, and a first valve body is connected to the bottom center of the breeding pond. The air pump outputs gas to each outlet pipe, and the air flow in the outlet pipe is divided into PV pipes and discharged from the air stone, forming air flow in multiple directions on the inner wall of the breeding pond, increasing the oxygen content of the breeding water, improving the activity and survival rate of fish and shrimp, and the PV pipes are arranged obliquely to increase the breeding space and reduce the risk of biological impact and injury. The air flow plate guides the exhaust air flow to the center to improve the fluidity of the aerated air flow in the breeding water body and evenly increase the oxygen of the water body. When the air flow plate is impacted by the air flow below, it drives the extension plate to squeeze the spring in the buffer cavity and move up and down reciprocatingly. On the one hand, it provides aeration airflow to water bodies of different depths, which is conducive to improving the homogenization of the water body, and on the other hand, it can drive The suspended limbs, dirt, etc. in the water sink to facilitate the treatment of the sewage filter and avoid the deterioration of water pollution. When adjusting the air pump power, the airflow plate will have different deformations according to the different flow rates of the aeration airflow, thereby changing the guiding direction of the aeration airflow. On the one hand, it changes the regular flow state of the water in the breeding pond, slows down the rate of aeration airflow loss to the outside, and increases the oxygen content in the breeding water. On the other hand, it ensures that the bait in the breeding water can remain suspended, which is beneficial to the feeding of fish and shrimp, and avoids suspended matter from sinking to the bottom or floating on the water surface to affect gas exchange. The multi-directional aeration airflow can also promote the activity of organisms in the pond to increase their activity and improve their economic value.

[0007] Preferably, a sewage pipe is connected between the first valve body and the sewage filter, the sewage pipe is connected with the first pump body, a return pipe is connected between the sewage filter and the water purifier, the return pipe is connected with the second pump body, the water purifier is connected with the water inlet pipe, the water inlet pipe is connected with the third pump body, and the outer end of the water inlet pipe is located above the inner wall of the breeding pond. The first valve body is a one-way valve, the sewage in the breeding pond flows through the sewage pipe, and is transported to the sewage filter for primary filtration under the action of the first pump body. The filtered water passes through the return pipe and is transported to the water purifier for secondary filtration under the action of the second pump body. The secondary filtered water flows out from the water inlet pipe to the breeding pond under the action of the third pump body, realizing water filtration and circulation, so as to improve the breeding environment and the survival rate of fish and shrimp.

[0008] Preferably, the sewage filter includes an outer shell, a cylindrical barrel is fixed in the outer shell, guide plates are arranged at intervals along the axial direction on the inner wall of the cylindrical barrel, a filter screen is provided at the bottom of the cylindrical barrel, one end of the sewage pipe passes through the outer shell and is connected to an annular pipe, the annular pipe is fixed to the outer top surface of the cylindrical barrel, the annular pipe is connected to a plurality of obliquely arranged diversion pipes, one end of the return pipe passes through the top surface of the outer shell and is located in the cylindrical barrel, and the other end is fixed to the bottom of the water purifier. Sewage flows into the annular pipe and flows downward from each diversion pipe to the cavity between the outer shell and the cylindrical barrel. The water flowing out of multiple diversion pipes forms a vortex water flow in the cavity. On the one hand, it is beneficial to remove the dirt attached to the inner wall of the outer shell and the outer wall of the cylindrical barrel, avoiding the long-term adhesion and accumulation of dirt causing the water to stink, thereby improving the quality of the filtered water. On the other hand, the vortex water flow is beneficial to the downward sinking of dirt, reducing the probability of dirt adhering to the inner wall of the outer shell and the outer wall of the cylindrical barrel. After the water flows in, the water level rises, the bottom water enters the cylinder after being filtered by the filter net and is pumped away by the return pipe to the water purifier for secondary filtration. The guide plate guides the pumped water upward and reduces the inner wall space of the cylindrical barrel, thereby increasing the pumping speed and avoiding the lack of water in the breeding pond due to untimely circulation of the filtered water.

[0009] Preferably, a sedimentation screen is provided on the inner wall of the bottom of the outer shell, the outer shell includes a dirt collecting matrix at the bottom, the bottom surface of the dirt collecting matrix is ​​connected to the second valve body, and an auxiliary sedimentation member is fixed on the end surface of the sedimentation screen. The through holes of the sedimentation screen are conducive to the downward sedimentation of dirt and collection by the dirt collecting matrix, reducing the risk of the bottom dirt being suspended again and clogging the filter screen. The second valve body can be opened when the circulation is stopped to release and discharge the settled dirt and large sand and gravel.

[0010] Preferably, the auxiliary settlement member includes a base, which is fixed at the center of the upper end surface of the settlement mesh plate. A supporting base is connected above the base, and a spherical shell plate is fixed upward to the supporting base. The spherical shell plate is surrounded by circular holes, which are small through holes. The base, the supporting matrix and the concave surface of the spherical shell plate form a curved surface. After the upper water flows down along the inner wall of the outer shell, it contacts the supporting matrix and the spherical shell plate and is guided by the formed curved surface. On the one hand, it reduces the noise generated by the backflow of the water impacting the bottom, and on the other hand, it is helpful to accelerate the dirt in the water to pass downward through the sedimentation mesh plate, which is beneficial to the collection of dirt and reduces the risk of dirt clogging the filter. The water flow can flow upward through the circular holes to form tiny bubbles. Some bubbles burst after contacting the filter, which is beneficial to remove impurities and dirt on the filter and improve the filtering effect. Another part of the bubbles enters the return pipe through the filter, which can reduce the probability of water blockage in the return pipe. When the second pump body stops working, the water in the return pipe flows down by gravity and generates downward bubbles through the circular holes, which is beneficial to suppress the re-suspension of the bottom dirt. The outer curved surface of the spherical shell plate is beneficial to guiding the downward flowing water and assisting the dirt to pass through the sedimentation mesh plate.

[0011] Preferably, the water purifier includes a box body, and a plurality of slow-flow columns are arranged in an array at the center position of the box body, adjacent slow-flow columns abut against each other, and the two outermost slow-flow columns abut against the inner wall of the box body, and annular grooves are arranged on any slow-flow column with the axis as the extension direction, and filter plates are symmetrically arranged above and below the slow-flow column, and the filter plates on the upper and lower sides abut against the slow-flow column, and any filter plate is connected to a filter layer on the side that does not abut against the slow-flow column, and the filter layer is made of carbonized cotton, and there is a spacing distance between the upper and lower filter layers and the inner top surface and inner bottom surface of the box body respectively. The filter layer made of carbonized cotton can effectively absorb and filter ammonia nitrogen and microorganisms in the water, thereby purifying the water quality discharged into the breeding pond, improving the survival rate of fish and shrimp, and reducing breeding costs. When the bottom water passes through the filter layer and the filter plate acting as the slow-flow column, the flow is blocked and discharged upward from the annular groove, which helps to achieve uniform upward flow of the filtered fluid to the filter plate and filter layer above, improving the filtration effect, and also avoiding water blockage in the water inlet pipe. When the water flows, the slow-flow column is squeezed to deform and bend it, thereby driving the filter plate and filter layer to deform and move, which is beneficial to avoid blockage of the filtration channel. The hollow deformation of the slow-flow column helps to absorb the noise of the water flow evolution process, achieve bass filtration, and avoid fish and shrimp from being frightened to death.

[0012] Preferably, a first bracket is connected to the bottom of the breeding pond, the first bracket includes a horizontal plate body, a second bracket is connected to the bottom of the outer shell, a third bracket is connected below the water purifier, and the third bracket is located above the horizontal plate body of the first bracket.

[0013] Since the present invention uses a sewage filter and a water purifier to achieve multiple filtration of aquaculture water and realize water circulation, it has the following beneficial effects: the connection of the aquaculture pond, sewage filter and water purifier realizes the filtration circulation of aquaculture water, which is beneficial to the survival of fish and shrimp; the first airlift component aerates and oxygenates the aquaculture water body to optimize the water body and improve the activity of fish and shrimp, while promoting their feeding and increasing economic value; the auxiliary sedimentation piece guides the sedimentation of residual limbs and dirt to improve the filtration effect; the filter layer adsorbs microorganisms and ammonia nitrogen to improve the degree of water purification; the deformation of the slow flow column avoids water flow blockage, and can reduce noise and avoid fish and shrimp stress. Therefore, the present invention is an airlift type physical and chemical treatment device for aquaculture, which increases the oxygen content of aquaculture water through aeration, and multiple filtration and circulation of aquaculture water to improve the vitality of aquatic organisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the front side of the invention;

[0015] Figure 2 This is a schematic diagram of the oblique side of the invention;

[0016] Figure 3 This is a half-section diagram of the breeding pond;

[0017] Figure 4 This is an enlarged schematic diagram of area A;

[0018] Figure 5 is a schematic diagram of the extension plate;

[0019] Figure 6 It is a schematic diagram of the sewage filter;

[0020] Figure 7 It is a schematic diagram of auxiliary sinking parts;

[0021] Figure 8 This is a schematic diagram of a water purifier;

[0022] Fig. 9 This is a schematic diagram of the connection between multiple breeding ponds and sewage filters.

[0023] Figure numbers: breeding pond 1; first valve body 10; sewage pipe 11; first pump body 12; return pipe 13; second pump body 14; water inlet pipe 15; third pump body 16; first air lift assembly 2; outlet pipe 20; PV pipe 21; air stone 22; air pipe 23; air pump 24; air flow plate 25; extension plate 26; buffer chamber 27; spring 28; sewage filter 3; outer shell 30; cylindrical tube 31; guide plate 32; filter screen 33; annular pipe 34; diverter pipe 35; sedimentation mesh plate 36; sewage collecting matrix 37; second valve body 38; auxiliary sedimentation member 4; base 40; support matrix 41; spherical shell plate 42; circular hole 43; water purifier 5; box body 50; slow flow column 51; annular groove 52; filter plate 53; filter layer 54; first bracket 6; second bracket 7; third bracket 8; DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described in detail below in conjunction with specific implementations and drawings:

[0025] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Example 1, see attached Figure 1 -Attached Figure 2 An airlift type physical and chemical treatment device for aquaculture comprises: a culture pond 1, which is a cylindrical shell with an upper end opening, the inner bottom surface of the culture pond 1 is concave downward toward the center, a through hole is opened at the bottom center of the culture pond 1 and a first valve body 10 is connected correspondingly below the through hole, and a first airlift component 2 is arranged around the inner wall of the culture pond 1.

[0027] A sewage filter 3 is arranged on the side of the breeding pond 1, a sewage pipe 11 is connected between the sewage filter 3 and the first valve body 10, a first pump body 12 is placed on the ground between the sewage filter 3 and the first valve body 10, and the sewage pipe 11 is matched with the first pump body 12;

[0028] A water purifier 5 is arranged on the side of the sewage filter 3, a return pipe 13 is connected between the water purifier 5 and the sewage filter 3, a second pump body 14 is arranged above the sewage filter 3, and the return pipe 13 and the second pump body 14 are arranged in coordination;

[0029] The water purifier 5 is arranged relatively above the oblique side of the breeding pond 1. The water purifier 5 is connected to a water inlet pipe 15. The free end of the water inlet pipe 15 is located above the inner wall of the breeding pond 1. Pipe clamps are provided on the outside of the water purifier 5 and the inner wall of the breeding pond 1. The water inlet pipe 15 is installed between the breeding pond 1 and the water purifier 5 through the pipe clamp. A third pump body 16 is arranged above the water purifier 5, and the water inlet pipe 15 and the third pump body 16 are arranged in coordination.

[0030] The activities of fish and shrimp in the breeding pond 1 produce feces and body parts, and the breeding water is filled with food residues. The first valve body 10 is opened to allow sewage to fall from the first valve body 10. Under the action of the first pump body 12, the water enters the sewage filter 3 through the sewage pipe 11 for the first filtration. The water after the first filtration enters the purifier through the return pipe 13 under the action of the second pump body 14. After the purifier purifies the water for the second time, the purified water is discharged from the water inlet pipe 15 to the breeding pond 1 under the action of the third pump body 16, so as to realize the filtration and circulation of the breeding water in the breeding pond 1, improve the water quality of the breeding water, be beneficial to the survival of fish and shrimp, and reduce the risk of death.

[0031] See attached Figure 3 -Attached Figure 5 The first air lift component 2 includes an air outlet pipe 20, which is connected to multiple PV pipes 21 in the horizontal direction. The end of the PV pipe 21 that is not connected to the air outlet pipe 20 is sealed. Multiple PV pipes 21 on the same side are parallel to each other and inclined relative to the air outlet pipe 20. Any PV pipe 21 is connected to multiple air stones 22 upward. The air outlet pipe 20 is connected to an air supply pipe 23. The multiple air supply pipes 23 are connected to each other through a circular pipe. An air pump 24 is installed on the ground on the side of the breeding pond 1, and a hose is connected between the circular pipe and the air outlet end of the air pump 24.

[0032] The air pump 24 outputs gas to each outlet pipe 20. The airflow in the outlet pipe 20 is divided into the PV pipe 21 and discharged from the air stone 22, forming airflow in multiple directions on the inner wall of the culture pond 1, increasing the oxygen content of the culture water, improving the activity and survival rate of fish and shrimp, and the PV pipe 21 is arranged obliquely to increase the culture space and reduce the risk of biological impact and injury. The airflow plate 25 guides the exhaust airflow to the center to improve the fluidity of the aerated airflow in the culture water body and evenly increase oxygen to the water body.

[0033] An airflow plate 25 is fixedly connected above the air outlet pipe 20. The airflow plate 25 is an elastic plate. The airflow plate 25 is inclined toward the center of the breeding pool 1 relative to the air outlet pipe 20. An extension plate 26 is connected to the side of the airflow plate 25 close to the breeding pool 1. The inner wall of the breeding pool 1 is provided with buffer cavities 27 that match the number and correspond to the position of the first air lift assembly 2. The extension plate 26 is located in the buffer cavity 27. Springs 28 are provided between the extension plate 26 and the upper and lower walls of the buffer cavity 27. The bottom center of the breeding pool 1 is connected to the first valve body 10.

[0034] The airflow plate 25 guides the exhaust airflow to the center of the aquaculture pond 1 to improve the fluidity of the aerated airflow in the aquaculture water body and evenly oxygenate the water body. When the airflow plate 25 is impacted by the airflow below, it drives the extension plate 26 to squeeze the spring 28 in the buffer cavity 27 and move up and down. On the one hand, it provides aeration airflow to water bodies of different depths, which is beneficial to improve the homogenization of the water body. On the other hand, it can drive the suspended limbs, dirt, etc. in the water to sink, making it convenient for sewage to be discharged from the first valve body 10 at the bottom of the sewage pipe 11 to avoid the deterioration of water pollution. The user can adjust the power of the air pump 24 according to the needs, change the flow rate of the airflow discharged by the air stone 22, and the airflow plate 2 5 Different deformations are produced according to the different flow rates of the aeration airflow, thereby changing the guiding direction of the aeration airflow. On the one hand, multi-directional disturbance of the water body is achieved, thereby constantly adjusting the regular flow state of the water body in the breeding pond 1, slowing down the external loss rate of the aeration airflow, and increasing the oxygen content in the breeding water. On the other hand, it ensures that the bait in the breeding water can remain suspended, which is beneficial to the feeding of fish and shrimp, while avoiding the suspended matter from sinking to the bottom or floating on the water surface to affect gas exchange. The multi-directional aeration airflow can also promote the activity of fish and shrimp in the pond to improve their activity. Keeping fish and shrimp active and moving during breeding is beneficial to improving their edible taste, thereby obtaining higher economic value.

[0035] See attached Figure 6 -Attached Figure 7 The sewage filter 3 includes an outer shell 30, a cylindrical tube 31 is fixed inside the outer shell 30, guide plates 32 are arranged at intervals along the axial direction on the inner wall of the cylindrical tube 31, a filter screen 33 is provided at the bottom of the cylindrical tube 31, one end of the sewage pipe 11 passes through the outer shell 30 and is connected to an annular tube 34, the annular tube 34 is fixed to the outer top surface of the cylindrical tube 31, the annular tube 34 is connected to a plurality of obliquely arranged diversion pipes 35, one end of the return pipe 13 passes through the top surface of the outer shell 30 and is located in the cylindrical tube 31, and the other end is fixed to the bottom of the water purifier 5.

[0036] The sewage continuously flows into the annular pipe 34 under the action of the first pump body 12, and flows downward from each branch pipe 35 to the cavity between the outer shell 30 and the cylindrical barrel 31. The water flowing out of the multiple branch pipes 35 forms a vortex water flow in the cavity, which is helpful for removing the dirt attached to the inner wall of the outer shell 30 and the outer wall of the cylindrical barrel 31, avoiding the long-term adhesion and accumulation of dirt to cause the water to stink, thereby improving the quality of the filtered water. On the other hand, the vortex water flow is conducive to the downward sinking of dirt, reducing the adhesion of dirt. The probability of being attached to the inner wall of the outer shell 30 and the outer wall of the cylindrical barrel 31, the water level rises after the water flows in, the bottom water enters the cylinder after being filtered by the filter net 33, and after the water level of the cylindrical barrel 31 is submerged in the lower end of the return pipe 13, the filtered water is pumped away by the return pipe to the water purifier 5 for secondary filtration, and the guide plate 32 guides the pumped water to the upper center and reduces the inner wall space of the cylindrical barrel 31, thereby increasing the pumping speed and avoiding water shortage in the breeding pond 1 due to untimely circulation of the filtered water.

[0037] A settling mesh plate 36 is provided on the inner wall of the bottom of the outer shell 30. The outer shell 30 includes a dirt collecting matrix 37 at the bottom. The bottom surface of the dirt collecting matrix 37 is connected to a second valve body 38. An auxiliary settling member 4 is fixed on the end surface of the settling mesh plate 36. Sewage enters the outer shell 30 and flows through the settling mesh plate 36. The dirt is settled in the dirt collecting matrix 37 by gravity. The settling mesh plate 36 relatively prevents the dirt from being suspended again. The second valve body 38 can be opened and discharged according to demand to discharge dirt and large sand and gravel, so as to avoid excessive accumulation of dirt in the dirt collecting matrix 37 to deteriorate the water body in the outer shell 30, and also reduce the blockage of the diversion pipe 35 after a large amount of accumulation.

[0038] The auxiliary sinker 4 includes a base 40, which is fixed at the center of the upper end surface of the sinking mesh plate 36. A support base 41 is connected above the base 40, and a spherical shell plate 42 is fixed upward to the support base 41. The spherical shell plate 42 is surrounded by circular holes 43, which are small through holes.

[0039] The base 40, the support base 41 and the concave surface of the spherical shell plate 42 form a curved surface. The upper water flows down along the inner wall of the outer shell 30, contacts the support base 41 and the spherical shell plate 42 in turn, and is guided by the curved surface. The water after the guidance carries the dirt through the sedimentation screen 36 below. The guidance of the water by the curved surface reduces the noise generated by the backflow of the water impacting the bottom, and on the other hand, it is conducive to accelerating the dirt to pass through the sedimentation screen 36 downward, which is conducive to the collection of dirt and reduces the risk of dirt clogging the filter screen 33. When the second pump body 14 extracts the water in the cylindrical barrel 31 through the return pipe 13, a pressure difference between the upper and lower sides of the filter screen 33 is generated, so that the spherical shell 33 is blocked. The water flow below the shell plate 42 can flow upward through the circular hole 43 to form tiny bubbles. Some bubbles burst after contacting the filter screen 33, which is beneficial to removing impurities and dirt on the filter screen 33 and improving the filtering effect. Another part of the bubbles enters the return pipe through the filter screen 33, which can reduce the probability of water blockage in the return pipe. When the second pump body 14 stops working, the water in the return pipe 13 flows downward due to gravity. When the water flows downward through the circular hole 43, bubbles are generated under the spherical shell plate 42, which is beneficial to suppress the re-suspension of bottom dirt when the water flows downward, and the outer curved surface of the spherical shell plate 42 is beneficial to diverting the downward flowing water and assisting the dirt to pass through the sedimentation mesh plate 36.

[0040] See attached Figure 8 The water purifier 5 includes a box body 50, and a plurality of slow-flow columns 51 are arranged in an array at the center position of the box body 50. Adjacent slow-flow columns 51 abut against each other, and the two outermost slow-flow columns 51 abut against the inner wall of the box body 50. Any slow-flow column 51 is provided with annular grooves 52 at intervals extending in the direction of the axis. Filter plates 53 are symmetrically arranged above and below the slow-flow column 51. The filter plates 53 on the upper and lower sides abut against the slow-flow column 51. Any filter plate 53 is connected to a filter layer 54 on a side that does not abut against the slow-flow column 51. The filter layer 54 is made of carbonized cotton, and there is a spacing distance between the upper and lower filter layers 54 and the inner top surface and the inner bottom surface of the box body 50 respectively. The filter layer 54 made of carbonized cotton material effectively absorbs and filters ammonia nitrogen and microorganisms in the water, thereby purifying the water quality discharged into the breeding pond 1, improving the survival rate of fish and shrimp, and reducing the breeding cost. When the bottom water passes through the filter layer 54 and the filter plate 53 to act on the slow-flow column 51, the flow is blocked and discharged upward from the annular groove 52, which helps to achieve a uniform upward flow of the filtered fluid to the upper filter plate 53 and the filter layer 54, thereby improving the filtering effect and avoiding water blockage in the water inlet pipe 15. When the water flows, the slow-flow column 51 is squeezed to deform and bend it, thereby driving the filter plate 53 and the filter layer 54 to deform and move, which helps to avoid blockage of the filtration channel. The hollow deformation of the slow-flow column 51 helps to absorb the noise of the water flow evolution process, achieve bass filtration, and avoid fish and shrimp from being frightened to death.

[0041] A first bracket 6 is connected to the bottom of the breeding pond 1, and the first bracket 6 includes a horizontal plate body and multiple columns fixed below the plate body. A second bracket 7 is connected to the bottom of the outer shell 30, and a third bracket 8 is connected below the water purifier 5. The third bracket 8 is located above the horizontal plate body of the first bracket 6.

[0042] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An airlift type physical and chemical treatment device for aquaculture, comprising: A breeding pond (1), wherein a plurality of first airlift components (2) are arranged around the inner wall of the breeding pond (1), and a sewage filter (3) and a water purifier (5) are arranged on the side of the breeding pond (1), wherein any of the first airlift components (2) comprises an air outlet pipe (20), and the air outlet pipe (20) is connected to a plurality of PV pipes (21) on the side, and the plurality of PV pipes (21) on the same side are parallel to each other and inclined relative to the air outlet pipe (20), and any of the PV pipes (21) is connected to a plurality of air stones (22) upwardly, and the air outlet pipe (20) is connected to There is an air delivery pipe (23), and a plurality of the air delivery pipes (23) are connected to the same air pump (24) through pipelines. An inclined air flow plate (25) is fixed above the air outlet pipe (20), and an extension plate (26) is connected to the side of the air flow plate (25). The inner wall of the breeding pond (1) is provided with a buffer cavity (27) whose number matches that of the first air lift assembly (2) and whose position corresponds to that of the first air lift assembly (2). The extension plate (26) is located in the buffer cavity (27), and springs (28) are provided between the extension plate (26) and the upper and lower walls of the buffer cavity (27). The bottom center of the culture pond (1) is connected to a first valve body (10); a sewage pipe (11) is connected between the first valve body (10) and the sewage filter (3); the sewage filter (3) comprises an outer shell (30); a cylindrical tube (31) is fixed inside the outer shell (30); a filter screen (33) is provided at the bottom of the cylindrical tube (31); one end of the sewage pipe (11) passes through the outer shell (30) and is connected to an annular tube (34); the annular tube (34) is fixed to the outer top surface of the cylindrical tube (31); the annular tube (34) is connected to a plurality of obliquely arranged diverter tubes (35); and the airflow plate (25) is inclined relative to the air outlet pipe (20) toward the center of the culture pond (1).

2. The airlift type physical and chemical treatment device for aquaculture according to claim 1, characterized in that: The sewage discharge pipe (11) is cooperatively connected to a first pump body (12); a return pipe (13) is connected between the sewage discharge filter (3) and the water purifier (5); the return pipe (13) is cooperatively connected to a second pump body (14); the water purifier (5) is connected to a water inlet pipe (15); the water inlet pipe (15) is cooperatively connected to a third pump body (16); and the outer end of the water inlet pipe (15) is located above the inner wall of the breeding pond (1).

3. The airlift type physical and chemical treatment device for aquaculture according to claim 2, characterized in that: The inner wall of the cylindrical tube (31) is provided with guide plates (32) at intervals along the axial direction; one end of the water return pipe (13) passes through the top surface of the outer shell (30) and is located in the cylindrical tube (31); the other end is fixed to the bottom of the water purifier (5).

4. The airlift type physical and chemical treatment device for aquaculture according to claim 1, characterized in that: The bottom inner wall of the outer shell (30) is provided with a sedimentation mesh plate (36), the outer shell (30) comprises a dirt collecting base (37) at the bottom, the bottom surface of the dirt collecting base (37) is connected to a second valve body (38), and an auxiliary sedimentation member (4) is fixed to the end surface of the sedimentation mesh plate (36).

5. The airlift type physical and chemical treatment device for aquaculture according to claim 4, characterized in that: The auxiliary sinking member (4) comprises a base (40), the base (40) being fixed at the center of the upper end surface of the sinking mesh plate (36), a supporting base (41) being connected above the base (40), a spherical shell plate (42) being fixed upwards on the supporting base (41), and circular holes (43) being arranged around the plate body of the spherical shell plate (42), the circular holes (43) being small through holes.

6. The airlift type physical and chemical treatment device for aquaculture according to claim 1, characterized in that: The water purifier (5) comprises a housing (50), wherein a plurality of slow-flow columns (51) are arranged in an array at a central position in the housing (50), wherein adjacent slow-flow columns (51) abut against each other, and the two outermost slow-flow columns (51) abut against the inner wall of the housing (50), and an annular groove (52) is arranged on any of the slow-flow columns (51) with the axis as the extending direction, and filter plates (53) are symmetrically arranged above and below the slow-flow columns (51), wherein the filter plates (53) on the upper and lower sides abut against the slow-flow columns (51), and a filter layer (54) is connected to a side of any of the filter plates (53) that does not abut against the slow-flow column (51), wherein the filter layer (54) is made of carbonized cotton, and there is a spacing distance between the upper and lower filter layers (54) and the inner top surface and inner bottom surface of the housing (50), respectively.

7. The airlift type physical and chemical treatment device for aquaculture according to claim 1 is characterized by: The bottom of the breeding pond (1) is connected to a first bracket (6), the first bracket (6) comprising a horizontal plate body, the bottom of the outer shell (30) is connected to a second bracket (7), the bottom of the water purifier (5) is connected to a third bracket (8), the third bracket (8) is located above the horizontal plate body of the first bracket (6).

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