Aeration filtration treatment device for aquaculture wastewater

Abstract

The invention discloses an aeration and filtration treatment device for aquaculture wastewater, comprising a box, a filter tank and an aeration tank are respectively arranged on both sides of the top of the box, and a sealing cover is connected to the top of the aeration tank by bolts, a discharge port is opened at the bottom of one side of the aeration tank, and a sealing plug is arranged inside the discharge port, a filter mechanism is arranged inside the filter tank, an aeration mechanism is arranged inside the aeration tank, an extraction mechanism is arranged between the aeration tank and the filter tank, the filter mechanism comprises a support plate and a filter plate, and a spring is connected between the four corners of the bottom of the support plate and the filter tank by bolts. The invention improves the fluctuation amplitude of aquaculture wastewater, so as to facilitate the stirring treatment of the filtration of aquaculture wastewater, thereby improving the filtration efficiency of aquaculture wastewater, and preventing the impurities mixed in the aquaculture wastewater from being blocked on the surface of the filter mechanism, thereby affecting the filtration efficiency of the wastewater.

Description

Technical Field

[0001] The invention relates to the field of filtration, and in particular to an aeration filtration treatment device for aquaculture wastewater. Background Art

[0002] In recent years, with the rapid development of high-density artificial breeding and the increasing pollution of the breeding environment, the pollution level of aquaculture water has far exceeded the purification capacity of the water itself. The pollutants formed by the residual feed and fish excrement in the process of artificial aquaculture cause the water itself to pollute and even deteriorate the water quality, which is manifested as: serious eutrophication of the water, increase of suspended solids in the water, increase of biological oxygen demand, chemical oxygen demand, nitrite nitrogen, etc., and decrease of dissolved oxygen. Therefore, when treating aquaculture wastewater, aeration and filtration of aquaculture wastewater is usually carried out through the device.

[0003] After searching, a Chinese patent application with application publication number CN105080210B discloses an aeration and filtration treatment device for aquaculture wastewater, aiming to provide an aeration and filtration treatment device for aquaculture wastewater that can circulate and utilize aquaculture wastewater. It includes a sedimentation tank, an aeration tank, a mechanical filtration device and an aeration tank, the sedimentation tank is connected to the aeration tank, the mechanical filtration device includes a pumping pipe, a water pump and a first drain pipe, one end of the pumping pipe is connected to the aeration tank, and the other end is connected to the water inlet of the water pump, the water inlet port of the first drain pipe is connected to the water outlet of the water pump, and the water outlet port of the first drain pipe is connected to the aeration tank.

[0004] When aeration and filtration are performed on aquaculture wastewater, the aquaculture wastewater is usually extracted and filtered through a filtering mechanism. During the filtration period, some impurities will be blocked on the surface of the filtering mechanism, thereby affecting the filtration efficiency of the wastewater. Summary of the invention

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The aeration and filtration treatment device for aquaculture wastewater comprises a box body, a filter tank and an aeration tank are respectively arranged on both sides of the top of the box body, and a sealing cover is connected to the top of the aeration tank by bolts, a discharge port is opened at the bottom of one side of the aeration tank, and a sealing plug is arranged inside the discharge port, a filter mechanism is arranged inside the filter tank, an aeration mechanism is arranged inside the aeration tank, an extraction mechanism is arranged between the aeration tank and the filter tank, the filter mechanism comprises a support plate and a filter plate, and four corners of the bottom of the support plate and the filter tank are connected by The bolts are connected with a spring, and a rotating groove is opened on the inner wall of the support plate, and the rotating groove is rotatably connected to the filter plate. A plurality of anti-blocking components are arranged on the top of the filter plate, and the anti-blocking components are composed of an anti-blocking frame, two rotating shafts and a plurality of rotating leaves. The bottom of the anti-blocking frame is connected to the top of the filter plate by bolts, and the two rotating shafts are respectively rotatably connected to the two sides of the anti-blocking frame through bearings. The two rotating shafts are staggered up and down, and a plurality of rotating leaves are fixed on the outer wall of the rotating shaft at equal distances. The rotating leaves are arranged obliquely, and the size of the rotating leaves gradually decreases from the outside to the inside.

[0007] Preferably, a positioning hole is provided on the top of the filter plate, and an inner wall of the positioning hole is provided with an internal thread, a positioning rod is connected to the bottom inner wall of the filter tank by bolts, and an outer wall of the positioning rod is provided with an external thread, which is matched with the internal thread.

[0008] Preferably, guide grooves are provided on the inner walls on both sides opposite to each other of the filter tank, and guide blocks are slidably connected to the inner walls of the guide grooves, and the guide blocks are connected to the support plates by bolts.

[0009] Preferably, the extraction mechanism includes a pump, a drain pipe, a conduit and two water suction pipes, and the pump is connected to the sealing cover by bolts, one end of the drain pipe is connected to one end of the pump by a flange, the other end of the drain pipe is located inside the aeration tank, the other end of the pump is connected to the conduit by a flange, both sides of the top of the filter tank are connected with fixing blocks by bolts, the two fixing blocks are fixedly connected to the two ends of the conduit, one end of the two water suction pipes is connected to the conduit by a flange, and the other end of the water suction pipe is located inside the filter tank.

[0010] Preferably, the aeration mechanism consists of an air pump, an air inlet pipe, an exhaust pipe and an air hood, and the air pump is connected to the outer wall of the box by bolts, the top of the air pump is connected to the air inlet pipe by a flange, the inner wall of the air inlet pipe is connected with a filter by bolts, the bottom end of the air pump is connected to the exhaust pipe by a flange, the top of the air hood is connected to the exhaust pipe by a flange, the bottom of the air hood is fixedly connected to the bottom inner wall of the aeration tank, and multiple air outlets are provided on the front and rear sides of the air hood, and the inner wall of the air outlet is connected to the air outlet pipe by bolts.

[0011] Preferably, one end of the air outlet pipe is connected to a silica gel filter via bolts.

[0012] Preferably, rotation holes are provided on both sides of the air hood, and a stirring mechanism is provided between the two rotation holes.

[0013] Preferably, the stirring mechanism consists of a rotating component, two sleeves and two stirring plates, and the rotating component includes a rotating rod and multiple blades. The two ends of the rotating rod are rotatably connected with the two rotating holes through bearings. The contact part between the rotating hole and the rotating rod is provided with a sealing ring. The multiple blades are fixed on the outer wall of the rotating rod at equal distances. The blades are located inside the air hood. Both sides of the outer wall of the rotating rod are provided with raised parts, and the two raised parts are located on both sides of the outer wall of the air hood. The sleeve is rotatably sleeved on the outer wall of the raised part. The shape of the raised part is U-shaped, and a connecting shaft is connected between the stirring plate and the sleeve through a hinge.

[0014] The beneficial effects of the present invention are:

[0015] The filter mechanism and anti-blocking component are provided in the present invention. When aquaculture wastewater is subjected to aeration and filtration treatment, the aquaculture wastewater is extracted into the interior of the filter tank. At this time, the aquaculture wastewater will impact the filter mechanism when flowing downward, and the support plate will drive the filter plate to slide toward the bottom of the filter tank under the impact of the aquaculture wastewater. Through the cooperation between the external thread and the internal thread, the filter plate is rotated while moving downward. At this time, the anti-blocking component will rotate with the rotation of the filter plate, and the rotating blade will drive the rotating shaft to rotate under the action of the aquaculture wastewater. Since the two rotating shafts are staggered and The size of the rotating blades gradually decreases from the outside to the inside. Therefore, when the two rotating shafts drive the rotating blades to rotate, the aquaculture wastewater will be divided into two streams under the action of the two rotating shafts to flow in the same direction. At this time, when the two streams of aquaculture wastewater come into contact, the two aquaculture wastewaters will form convection, so that the aquaculture wastewater will collide under the action of convection, thereby increasing the fluctuation amplitude of the aquaculture wastewater, so as to facilitate the aquaculture wastewater filtration to be stirred, thereby improving the filtration efficiency of the aquaculture wastewater, and preventing the impurities mixed in the aquaculture wastewater from being blocked on the surface of the filter mechanism, thereby affecting the filtration efficiency of the wastewater;

[0016] The present invention provides an aeration mechanism and a stirring mechanism. When the filtered aquaculture wastewater is transported to the inside of the aeration tank through the extraction mechanism, the aeration mechanism is started, the air pump extracts air and transports it to the inside of the air hood through the exhaust pipe. The air is transported to the inside of the aeration tank through the outlet pipe and the silica gel filter, so as to aerate the aquaculture wastewater. The silica gel filter blocks the aquaculture wastewater, so as to prevent the aquaculture wastewater from entering the air hood. During this period, when the air discharged from the exhaust pipe contacts the blades, the blades drive the rotating rod to rotate under the action of the air. At this time, the protrusions rotate synchronously with the rotating rod, and the connecting shaft drives the stirring plate to swing back and forth up and down under the action of the protrusions and the shaft sleeve, so that the aquaculture wastewater is turned upside down, so as to improve the fluidity of the aquaculture wastewater, thereby improving the aeration effect of the aquaculture wastewater, and preventing the poor contact effect between the air and the aquaculture wastewater due to the poor fluidity of the aquaculture wastewater, thereby affecting the aeration of the aquaculture wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the aeration and filtration treatment device for aquaculture wastewater proposed by the present invention;

[0018] Figure 2 This is a schematic cross-sectional view of the aeration and filtration treatment device for aquaculture wastewater proposed by the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the filtering mechanism and anti-blocking components of the aeration and filtration treatment device for aquaculture wastewater proposed by the present invention;

[0020] Figure 4 This is a partial structural schematic diagram of the aeration and filtration treatment device for aquaculture wastewater proposed by the present invention;

[0021] Figure 5 This is a schematic structural diagram of the anti-blocking component of the aeration and filtration treatment device for aquaculture wastewater proposed by the present invention;

[0022] Figure 6 This is a schematic diagram of the extraction mechanism structure of the aeration and filtration treatment device for aquaculture wastewater proposed by the present invention;

[0023] Figure 7 This is a schematic diagram of the aeration mechanism structure of the aeration filtration treatment device for aquaculture wastewater proposed by the present invention;

[0024] Figure 8 This is a schematic diagram of the stirring mechanism structure of the aeration and filtration treatment device for aquaculture wastewater proposed by the present invention.

[0025] In the attached drawings: 1, box body; 2, filter tank; 3, guide groove; 4, filter mechanism; 5, extraction mechanism; 6, aeration tank; 7, sealing cover; 8, aeration mechanism; 9, rotating assembly; 10, support plate; 11, guide block; 12, spring; 13, rotating tank; 14, filter plate; 15, positioning rod; 16, anti-blocking assembly; 17, positioning port; 18, anti-blocking frame; 19, rotating shaft; 20, rotating blade; 21, pump; 22, drain pipe; 23, fixing block; 24, conduit; 25, water pump; 26, air pump; 27, air inlet pipe; 28, filter screen; 29, air hood; 30, exhaust pipe; 31, air outlet pipe; 32, silica gel filter screen; 33, stirring mechanism; 34, rotating rod; 35, blade; 36, raised part; 37, shaft sleeve; 38, connecting shaft; 39, stirring plate. DETAILED DESCRIPTION

[0026] Example 1, reference Figure 1-Figure 7The aeration and filtration treatment device for aquaculture wastewater comprises a box body 1, a filter tank 2 and an aeration tank 6 are respectively arranged on both sides of the top of the box body 1, and a sealing cover 7 is connected to the top of the aeration tank 6 by bolts, a discharge port is opened at the bottom of one side of the aeration tank 6, and a sealing plug is arranged inside the discharge port, a filter mechanism 4 is arranged inside the filter tank 2, an aeration mechanism 8 is arranged inside the aeration tank 6, an extraction mechanism 5 is arranged between the aeration tank 6 and the filter tank 2, the filter mechanism 4 comprises a support plate 10 and a filter plate 14, and the support plate 10 The four corners of the bottom are connected to the filter tank 2 by bolts with springs 12, the inner wall of the support plate 10 is provided with a rotating groove 13, and the rotating groove 13 is rotatably connected to the filter plate 14, and the top of the filter plate 14 is provided with a plurality of anti-blocking components 16, the anti-blocking components 16 are composed of an anti-blocking frame 18, two rotating shafts 19 and a plurality of rotating leaves 20, and the bottom of the anti-blocking frame 18 is connected to the top of the filter plate 14 by bolts, and the two rotating shafts 19 are respectively rotatably connected to the two sides of the anti-blocking frame 18 by bearings, and the two rotating shafts 19 are staggered up and down. The filter plate 14 is provided with a filter element 16, wherein the filter element 16 is provided with a plurality of rotating blades 20, and the plurality of rotating blades 20 are fixed at equal distances on the outer wall of the rotating shaft 19. The rotating blades 20 are arranged tilted, and the size of the rotating blades 20 gradually decreases from the outside to the inside. Through the cooperation between the external thread and the internal thread, the filter plate 14 is rotated while moving downward. At this time, the anti-blocking component 16 will rotate with the rotation of the filter plate 14, and the rotating blades 20 will drive the rotating shaft 19 to rotate under the action of the aquaculture wastewater. Since the two rotating shafts 19 are staggered and the size of the rotating blades 20 gradually decreases from the outside to the inside, when the two rotating shafts 19 drive the rotating blades 20 to rotate, the aquaculture wastewater will be divided into two streams under the action of the two rotating shafts 19 to flow in the same direction. At this time, when the two streams of aquaculture wastewater contact, the two aquaculture wastewaters will form convection, so that the aquaculture wastewater will collide under the action of the convection, thereby increasing the fluctuation amplitude of the aquaculture wastewater, so as to facilitate the stirring treatment of the filtration of the aquaculture wastewater, thereby improving the filtration efficiency of the aquaculture wastewater, and preventing the impurities mixed in the aquaculture wastewater from being blocked on the surface of the filter mechanism 4, thereby affecting the filtration efficiency of the wastewater.

[0027] On the basis of the above, a positioning hole 17 is opened on the top of the filter plate 14, and an inner wall of the positioning hole 17 is opened with an internal thread. The bottom inner wall of the filter tank 2 is connected with a positioning rod 15 by bolts, and the outer wall of the positioning rod 15 is opened with an external thread, which is compatible with the internal thread.

[0028] On the basis of the above, guide grooves 3 are provided on the inner walls of the filter tank 2 on both sides opposite to each other, and the inner walls of the guide grooves 3 are slidably connected with guide blocks 11, and the guide blocks 11 are connected to the support plate 10 by bolts.

[0029] On the basis of the above, the extraction mechanism 5 includes a pump 21, a drain pipe 22, a conduit 24 and two water extraction pipes 25, and the pump 21 is connected to the sealing cover 7 by bolts, one end of the drain pipe 22 is connected to one end of the pump 21 by a flange, the other end of the drain pipe 22 is located inside the aeration tank 6, the other end of the pump 21 is connected to the conduit 24 by a flange, both sides of the top of the filter tank 2 are connected with fixing blocks 23 by bolts, the two fixing blocks 23 are fixedly connected to the two ends of the conduit 24, one end of the two water extraction pipes 25 is connected to the conduit 24 by a flange, and the other end of the water extraction pipe 25 is located inside the filter tank 2.

[0030] On the basis of the above, the aeration mechanism 8 is composed of an air pump 26, an air inlet pipe 27, an exhaust pipe 30 and an air hood 29, and the air pump 26 is connected to the outer wall of the box body 1 by bolts, the top of the air pump 26 is connected to the air inlet pipe 27 by a flange, the inner wall of the air inlet pipe 27 is connected to the filter screen 28 by bolts, the bottom end of the air pump 26 is connected to the exhaust pipe 30 by a flange, the top of the air hood 29 is connected to the exhaust pipe 30 by a flange, the bottom of the air hood 29 is fixedly connected to the bottom inner wall of the aeration tank 6, and a plurality of air outlets are provided on the front and rear sides of the air hood 29, the inner wall of the air outlet is connected to the air outlet pipe 31 by bolts, and one end of the air outlet pipe 31 is connected to a silica gel filter screen 32 by bolts.

[0031] Example 2, reference Figure 1-Figure 8 , an aeration and filtration treatment device for aquaculture wastewater, compared with Example 1, on the basis of Example 1, rotary holes are opened on both sides of the air hood 29, and a stirring mechanism 33 is provided between the two rotary holes.

[0032] On the basis of the above, the stirring mechanism 33 is composed of a rotating component 9, two shaft sleeves 37 and two stirring plates 39, and the rotating component 9 includes a rotating rod 34 and a plurality of blades 35, the two ends of the rotating rod 34 are rotatably connected with the two rotating holes through bearings, and a sealing ring is provided at the contact portion between the rotating hole and the rotating rod 34, and the plurality of blades 35 are fixed on the outer wall of the rotating rod 34 at equal distances, and the blades 35 are located inside the air hood 29, and protrusions 36 are provided on both sides of the outer wall of the rotating rod 34, and the two protrusions 36 are located on both sides of the outer wall of the air hood 29, and the shaft sleeve 37 is rotatably sleeved on the outer wall of the protrusion 36, and the shape of the protrusion 36 is U-shaped, and the stirring plate 39 and the shaft sleeve are rotatably sleeved on the outer wall of the protrusion 36, and the shape of the protrusion 36 is U-shaped. The sleeves 37 are connected with a connecting shaft 38 by a hinge. When the air discharged from the exhaust pipe 30 contacts the blades 35, the blades 35 will drive the rotating rod 34 to rotate under the action of the air. At this time, the protrusion 36 will rotate synchronously with the rotating rod 34, and the connecting shaft 38 will drive the stirring plate 39 to swing back and forth up and down under the action of the protrusion 36 and the sleeve 37, so that the aquaculture wastewater is turned upside down, so as to improve the fluidity of the aquaculture wastewater, thereby improving the aeration effect of the aquaculture wastewater, and preventing the poor contact effect between the air and the aquaculture wastewater due to the poor fluidity of the aquaculture wastewater, thereby affecting the aeration of the aquaculture wastewater.

[0033] In summary, with the aid of the above technical solution of the present invention: when aquaculture wastewater is subjected to aeration and filtration treatment, the aquaculture wastewater is pumped into the interior of the filter tank 2. At this time, the aquaculture wastewater will impact the filter mechanism 4 when flowing downward, and the support plate 10 will drive the filter plate 14 to slide toward the bottom of the filter tank 2 under the impact of the aquaculture wastewater, and through the cooperation between the external thread and the internal thread, the filter plate 14 is rotated while moving downward. At this time, the anti-blocking component 16 will rotate with the rotation of the filter plate 14, and the rotating blade 20 will drive the rotating shaft 19 to rotate under the action of the aquaculture wastewater. Since the two rotating shafts 19 are staggered and the size of the rotating blades 20 gradually decreases from the outside to the inside, when the two rotating shafts 19 drive the rotating blades 20 to rotate, the aquaculture wastewater will be divided into two streams under the action of the two rotating shafts 19 to flow in the same direction. At this time, when the two streams of aquaculture wastewater come into contact, the two aquaculture wastewaters will form convection, so that the aquaculture wastewater will collide under the action of convection, thereby increasing the fluctuation amplitude of the aquaculture wastewater, so as to facilitate the aquaculture wastewater filtration to be stirred, thereby improving the filtration efficiency of the aquaculture wastewater and preventing the impurities mixed in the aquaculture wastewater from clogging the filtration. The surface of the mechanism 4 affects the filtration efficiency of the wastewater. When the filtered aquaculture wastewater is transported to the inside of the aeration tank 6 through the extraction mechanism 5, the aeration mechanism 8 is started, and the air pump 26 extracts the air and transports it to the inside of the air hood 29 through the exhaust pipe 30. The air is transported to the inside of the aeration tank 6 through the outlet pipe 31 and the silica gel filter 32, thereby aerating the aquaculture wastewater, and the silica gel filter 32 blocks the aquaculture wastewater, thereby preventing the aquaculture wastewater from entering the inside of the air hood 29. During this period, when the air discharged from the exhaust pipe 30 is in contact with the blades 3 When the blade 35 contacts the aquaculture wastewater, the blade 35 will drive the rotating rod 34 to rotate under the action of the air. At this time, the protrusion 36 will rotate synchronously with the rotating rod 34, and the connecting shaft 38 will drive the stirring plate 39 to swing back and forth up and down under the action of the protrusion 36 and the shaft sleeve 37, so that the aquaculture wastewater is turned upside down, so as to improve the fluidity of the aquaculture wastewater, thereby improving the aeration effect of the aquaculture wastewater, and preventing the poor contact effect between the air and the aquaculture wastewater due to the poor fluidity of the aquaculture wastewater, thereby affecting the aeration of the aquaculture wastewater. The aerated aquaculture wastewater will be discharged through the outlet.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An aeration and filtration treatment device for aquaculture wastewater, comprising a housing (1), wherein a filter tank (2) and an aeration tank (6) are respectively arranged on both sides of the top of the housing (1), and a sealing cover (7) is connected to the top of the aeration tank (6) by bolts, and a discharge port is opened at the bottom of one side of the aeration tank (6), and a sealing plug is arranged inside the discharge port, characterized in that: A filtering mechanism (4) is arranged inside the filter tank (2), an aeration mechanism (8) is arranged inside the aeration tank (6), an extraction mechanism (5) is arranged between the aeration tank (6) and the filter tank (2), the filtering mechanism (4) comprises a support plate (10) and a filter plate (14), and springs (12) are connected between the four corners of the bottom of the support plate (10) and the filter tank (2) by bolts, a rotating groove (13) is provided on the inner wall of the support plate (10), and the rotating groove (13) is rotatably connected to the filter plate (14), and a plurality of anti-blocking components (16) are arranged on the top of the filter plate (14), and the anti-blocking components (16) are composed of an anti-blocking frame (18), two rotating shafts (19) and a plurality of rotating blades (2 0), and the bottom of the anti-blocking frame (18) is connected to the top of the filter plate (14) by bolts, and the two rotating shafts (19) are respectively connected to the two sides of the anti-blocking frame (18) by bearings to form a rotation connection, and the two rotating shafts (19) are staggered up and down, and a plurality of rotating blades (20) are fixed on the outer wall of the rotating shaft (19) at equal distances, and the rotating blades (20) are inclined. The size of the rotating blades (20) gradually decreases from the outside to the inside, and the aeration mechanism (8) is composed of an air pump (26), an air inlet pipe (27), an exhaust pipe (30) and an air hood (29), and the air pump (26) is connected to the outer wall of the box body (1) by bolts, and the top of the air pump (26) is connected to the air inlet pipe (27) by a flange, and the air inlet pipe The inner wall of the air hood (27) is connected to a filter screen (28) by bolts, the bottom end of the air pump (26) is connected to the exhaust pipe (30) by a flange, the top of the air hood (29) is connected to the exhaust pipe (30) by a flange, the bottom of the air hood (29) is fixedly connected to the bottom inner wall of the aeration tank (6), the front and rear sides of the air hood (29) are provided with a plurality of air outlets, the inner wall of the air outlet is connected to an air outlet pipe (31) by bolts, one end of the air outlet pipe (31) is connected to a silica gel filter screen (32) by bolts, the two sides of the air hood (29) are provided with rotating holes, and a stirring mechanism (33) is arranged between the two rotating holes, the stirring mechanism (33) is composed of a rotating component (9), two shaft sleeves (37) and two stirring The rotating assembly (9) comprises a rotating rod (34) and a plurality of blades (35). The two ends of the rotating rod (34) are rotatably connected to the two rotating holes via bearings. A sealing ring is provided at the contact portion between the rotating hole and the rotating rod (34). The plurality of blades (35) are fixed on the outer wall of the rotating rod (34) at equal distances. The blades (35) are located inside the air hood (29). Both sides of the outer wall of the rotating rod (34) are provided with protrusions (36). The two protrusions (36) are located on both sides of the outer wall of the air hood (29). The shaft sleeve (37) is rotatably sleeved on the outer wall of the protrusion (36). The protrusion (36) is in a U-shape. A connecting shaft (38) is connected between the stirring plate (39) and the shaft sleeve (37) via a hinge.

2. The aeration filtration treatment device for aquaculture wastewater according to claim 1, characterized in that: The top of the filter plate (14) is provided with a positioning opening (17), and the inner wall of the positioning opening (17) is provided with an internal thread. The inner wall of the bottom of the filter tank (2) is connected to a positioning rod (15) via bolts, and the outer wall of the positioning rod (15) is provided with an external thread, which is compatible with the internal thread.

3. The aeration filtration treatment device for aquaculture wastewater according to claim 2, characterized in that: The inner walls of the filter tank (2) on both sides opposite to each other are provided with guide grooves (3), and the inner walls of the guide grooves (3) are slidably connected with guide blocks (11), and the guide blocks (11) are connected to the support plate (10) via bolts.

4. The aeration filtration treatment device for aquaculture wastewater according to claim 1, characterized in that: The extraction mechanism (5) comprises a pump (21), a drainage pipe (22), a conduit (24) and two water extraction pipes (25), wherein the pump (21) is connected to the sealing cover (7) by bolts, one end of the drainage pipe (22) is connected to one end of the pump (21) by a flange, the other end of the drainage pipe (22) is located inside the aeration tank (6), the other end of the pump (21) is connected to the conduit (24) by a flange, both sides of the top of the filter tank (2) are connected to fixing blocks (23) by bolts, the two fixing blocks (23) are fixedly connected to both ends of the conduit (24), one end of the two water extraction pipes (25) is connected to the conduit (24) by a flange, and the other end of the water extraction pipe (25) is located inside the filter tank (2).

Images