Circulating aquaculture system

Abstract

The utility model provides a recirculating aquaculture system, and relates to the technical field of aquaculture. The aquaculture pond comprises a pond body, an aquaculture mechanism and a water treatment mechanism are arranged in the pond body, a partition wall is arranged in the pond body, the two ends of the partition wall are spaced from the side wall of the pond body, the aquaculture mechanism comprises a plurality of aquaculture units which are arranged in a snakelike track and sequentially communicated end to end, and the aquaculture units are located on the two sides of the partition wall respectively; the water treatment mechanism is arranged between one end part of the partition wall and the side wall of the tank body, the water treatment mechanism sequentially comprises a filter tank and a biochemical tank, and a water inlet and a water outlet of the water treatment mechanism are respectively communicated with the tank bodies on two sides of the partition wall; the air conveying mechanism comprises a roots blower arranged outside the pond body, an air conveying pipeline communicated with the roots blower is arranged on the periphery of the pond body, and a first air inlet assembly and a second air inlet assembly which are communicated with the air conveying pipeline are arranged in the breeding mechanism and the water treatment mechanism respectively. Water flow annularly flows in the pool body, and a water treatment mechanism is arranged on a flowing track, so that a water return pipeline and a water pump are not needed.

Description

Technical Field

[0001] The utility model relates to the technical field of aquaculture, in particular to a circulating water aquaculture system. Background Art

[0002] Aquaculture is the production of aquatic economic animals and plants that humans use waters available for breeding (including planting) according to the ecological habits of the breeding objects and the requirements for the environmental conditions of the waters, using aquaculture techniques and facilities. With the promulgation and implementation of the aquaculture water surface planning, a large number of traditional aquaculture water surfaces such as lakes and reservoirs have been designated as prohibited aquaculture areas. Coupled with the pressure of industrial pollution and agricultural non-point source pollution, the national aquaculture area has been greatly reduced.

[0003] At present, self-built aquaculture ponds are popular. The water in the pond generally flows linearly. Water treatment equipment is installed on one side of the pond at the end of the water flow direction. The water in the pond is treated and then sent back to the starting end of the water flow through a pipe. This type of pond layout requires the installation of a return pipe and a corresponding water pump. Utility Model Content

[0004] The utility model aims to develop a circulating water culture system in which water flows in a pond in an annular shape and a water treatment mechanism is arranged on the flow track so that a return water pipeline and a water pump are not required.

[0005] The utility model is achieved through the following technical solutions:

[0006] A circulating aquaculture system, comprising:

[0007] Pool body;

[0008] The breeding mechanism and water treatment mechanism are located in the pond;

[0009] A gas delivery mechanism for delivering air or oxygen into the pool;

[0010] The partition wall is set inside the tank body and has a gap between its two ends and the side wall of the tank body;

[0011] Wherein, the breeding mechanism comprises a plurality of breeding units arranged in a serpentine track and connected end to end in sequence, and the plurality of breeding units are respectively located on both sides of the partition wall;

[0012] The water treatment mechanism is arranged between one end of the partition wall and the side wall of the pool body, and the water treatment mechanism includes a filtering pool and a biochemical pool in sequence according to the water flow direction, and the water inlet and the water outlet of the water treatment mechanism are respectively connected to the pool body on both sides of the partition wall;

[0013] The gas delivery mechanism includes a Roots blower arranged outside the pool body, and a gas delivery pipeline connected to the Roots blower is arranged outside the pool body. The breeding mechanism and the water treatment mechanism are respectively provided with a first air intake component and a second air intake component connected to the gas delivery pipeline.

[0014] Optionally, the breeding unit includes a connecting groove and a breeding groove in sequence in the direction of water flow, the bottom surface of the connecting groove is lower than the breeding groove, and a vertically arranged retaining wall is provided in the connecting groove.

[0015] Optionally, a sewage collecting assembly is provided on the bottom surface of the breeding tank away from the connecting tank, and the sewage collecting assembly includes a plurality of sewage troughs connected in series, the sewage trough is in the shape of a quadrangular pyramid and the end with a larger diameter is located on the bottom surface of the breeding tank, and the end with a smaller diameter of the sewage trough faces downward, and a connecting pipe is connected below the plurality of sewage troughs, and the connecting pipe is connected to a sludge container, and a valve is provided on the pipeline between the connecting pipe and the sludge container.

[0016] Optionally, anti-escape nets are provided at both ends of the breeding tank between the sewage collecting component and the connecting tank, the top of the anti-escape net is not lower than the highest water level, and the bottom of the anti-escape net is connected to the bottom surface of the breeding tank.

[0017] Optionally, the first air intake assembly includes a first air pipe arranged in the connecting groove and a plurality of second air pipes arranged in the breeding groove, the first air pipe is located on the side of the connecting groove close to the breeding groove, the first air pipe is provided with a plurality of first air holes, the first air holes are located obliquely upward toward the breeding groove in the circumferential direction of the first air pipe, the second air pipe is provided with a plurality of second air holes, the second air holes are located on the side facing the water flow direction in the circumferential direction of the second air pipe.

[0018] Optionally, the water treatment mechanism includes a side wall arranged at the end of the partition wall, and the two ends of the side wall are respectively provided with an inlet wall and an outlet wall connected to the side wall of the pool body, the water inlet is arranged at the bottom of the inlet wall, and the water outlet is arranged at the top of the outlet wall, and a barrier wall is also arranged between the inlet wall and the outlet wall, with its two ends respectively connected to the partition wall and the side wall of the pool body, the filtration pool is between the barrier wall and the water inlet wall, and the biochemical pool is between the barrier wall and the outlet wall.

[0019] Optionally, the bottom surface of the filter pool is an inclined surface, and the side of the bottom surface of the filter pool close to the water inlet is the lower end. A filter assembly is provided in the filter pool, and the filter assembly includes a filter shell with a mesh structure, and the filter shell is filled with filter material. A hanging ring is provided on the top of the filter shell, and a movable connection assembly is provided between the bottom of the filter shell and the bottom of the filter pool.

[0020] Optionally, the movable connection component includes a lower support column and an upper support column which are respectively arranged on the bottom surface of the filter pool and the bottom surface of the filter shell and have corresponding positions. A slot is opened inwardly at the top end of the lower support column, and a truncated cone-shaped guide cover is provided at the top end of the lower support column. A guide block and a plug column are sequentially provided at the bottom end of the upper support column. The guide block is in the shape of a truncated cone that cooperates with the guide cover. The position of the plug column corresponds to the slot, and the bottom end of the plug column and the inner end of the slot are provided with strong magnets that cooperate with each other.

[0021] Optionally, a horizontally arranged support net is provided at the lower part of the biochemical pool, and a biological filler is provided in the biochemical pool above the support net. The biological filler is an MBBR filler, and the model of the carrier is K5.

[0022] Optionally, the second air intake assembly includes a plurality of oxygenation pipes arranged in the biochemical pool below the support net, the plurality of oxygenation pipes are parallel to each other and are arranged at equal intervals in the same plane, a plurality of air holes are evenly arranged on the top of the oxygenation pipes, air stones are arranged in the air holes, and a connecting box connected to the sides of the plurality of oxygenation pipes is arranged, and the connecting box is connected to the gas pipeline.

[0023] The beneficial effects of the utility model are:

[0024] The utility model has a compact structure and occupies a small area. The water flows in a "mouth"-shaped circular trajectory. The water treatment mechanism is arranged on the water flow trajectory. The treated water directly continues to participate in the circulation without the need to additionally arrange a return pipe and a water pump, thereby reducing costs. During the water body circulation process, the remaining bait and feces in the water body sink into the sewage trough and are regularly discharged through the connecting pipe; the aquatic products are cultured in multiple breeding units so that the aquatic products are evenly distributed in the pool body, and different species can be cultured in different breeding units; by setting the injection direction of air or oxygen in the pool body, not only the dissolved oxygen content of the water body is increased, but also it can be used as a power source to promote the circulation of the water flow; the filter component is arranged to facilitate loading and unloading in the filter pool, convenient for replacing or maintaining the filter material, and convenient for the filter pool to maintain the filtering performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the structure of the utility model;

[0027] Figure 2 It is a structural schematic diagram of two adjacent breeding units;

[0028] Figure 3 It is a schematic diagram of the structure of the water treatment mechanism;

[0029] Figure 4 is a schematic diagram of the structure of the filter component;

[0030] Figure 5 Schematic diagram of the structure of the active connection component.

[0031] Figure numerals: 1. tank body; 2. partition wall; 3. connecting trough; 4. breeding trough; 5. retaining wall; 6. first gas pipeline; 7. second gas pipeline; 8. escape prevention net; 9. sewage trough; 10. Roots blower; 11. gas pipeline; 12. side wall; 13. water inlet wall; 14. barrier wall; 15. water outlet wall; 16. filter tank; 17. biochemical tank; 18. oxygenation pipe; 19. blocking net; 20. filter assembly; 201. filter shell; 202. filter material; 203. lifting ring; 21. movable connection assembly; 211. lower support column; 212. upper support column; 213. slot; 214. guide cover; 215. guide block; 216. plug column; 217. strong magnet; 22. support net; 23. connecting pipe. DETAILED DESCRIPTION

[0032] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0034] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0035] like Figures 1 to 5 As shown, the utility model discloses a circulating aquaculture system, including a pool body 1, in which a culture mechanism, a water treatment mechanism and a gas transmission mechanism are arranged. The culture mechanism includes a plurality of culture units which are arranged in the pool body 1 and are connected end to end in sequence and arranged in a serpentine trajectory. The water inlet and outlet of the water treatment mechanism are respectively connected to the two culture units at the head and tail of the culture mechanism, and the gas transmission mechanism transmits air or oxygen to the culture mechanism and the water treatment mechanism.

[0036] The pool body 1 is in the shape of a rectangular parallelepiped, and a partition wall 2 is provided in the middle of the pool body 1 and is arranged parallel to its length direction. Both ends of the partition wall 2 are spaced apart from the side walls of the pool body 1, so that the partition wall 2 divides the inside of the pool body 1 into a flow channel with a "mouth"-shaped trajectory. The two ends of the partition wall 2 are the two turning points of the flow channel. The water treatment mechanism is arranged at one of the turning points, and the other turning point is connected to a water channel. When the external water source is exhausted, it can enter the pool body 1 through the water channel to replenish the water volume.

[0037] The multiple breeding units in the breeding mechanism are respectively arranged on both sides of the partition wall 2. The water flow in the pool body 1 circulates in one direction. After the water flow passes through the multiple breeding units on one side of the partition wall 2, it flows into the other side of the partition wall 2 at one of the turning points, and then passes through the multiple breeding units in sequence and enters the water treatment mechanism at another turning point. After the water treatment is completed, the water flow circulates again.

[0038] The breeding unit includes a connecting groove 3 and a breeding groove 4 in sequence in the direction of water flow. The bottom surface of the connecting groove 3 is lower than the breeding groove 4. A vertically arranged retaining wall 5 is provided in the connecting groove 3. The top of the retaining wall 5 is not lower than the highest water level. The bottom end of the retaining wall 5 extends into the connecting groove 3 and the bottom end of the retaining wall 5 is lower than the bottom surface of the breeding groove 4, so that the water flow in the connecting groove 3 presents a U-shaped flow trajectory.

[0039] A sewage collecting assembly is provided on the bottom of the breeding tank 4 away from the connecting tank 3. The sewage collecting assembly includes four sewage collecting tanks 9 connected in sequence. The sewage collecting tanks 9 are in the shape of a quadrangular pyramid. The end of the sewage collecting tank 9 with a larger diameter is located on the bottom of the breeding tank 4, and the end of the sewage collecting tank 9 with a smaller diameter faces downward. A connecting pipe 23 is provided below the four sewage collecting tanks 9. The ends of the four sewage collecting tanks 9 with a smaller diameter are connected to the connecting pipe 23 through a pipeline. The connecting pipe 23 is connected to the sludge container. A valve is provided on the pipeline between the connecting pipe 23 and the sludge container.

[0040] Anti-escape nets 8 are respectively provided at both ends of the breeding trough 4 between the sewage collection component and the connecting trough 3. The top of the anti-escape net 8 is not lower than the highest water level, and the bottom of the anti-escape net 8 is connected to the bottom surface of the breeding trough 4. The anti-escape net 8 prevents the farmed animals from leaving the breeding trough 4.

[0041] The water treatment mechanism includes a side wall 12 connected to the end of the partition wall 2 at the turning point. The side wall 12 is vertically arranged and perpendicular to the partition wall 2. The side walls of the side wall 12 at both ends away from the breeding mechanism are respectively provided with an inlet wall 13 and an outlet wall 15. The inlet wall 13 and the outlet wall 15 are both arranged parallel to the partition wall 2. The ends of the inlet wall 13 and the outlet wall 15 away from the side wall 12 are connected to the pool body 1. The side wall 12, the inlet wall 13, the outlet wall 15 and the pool body 1 enclose a rectangular water treatment cavity. A barrier wall 14 parallel to the inlet wall 13 and the outlet wall 15 is also arranged between them. The two ends of the barrier wall 14 are respectively connected to the side wall 12 and the pool body 1. The barrier wall 14 divides the water treatment cavity into a filtration pool 16 and a biochemical pool 17.

[0042] The bottom of the water inlet wall 13 is provided with a water inlet, and the area of ​​the pool body 1 outside the water inlet wall 13 is a water inlet trough. Water passing through the breeding mechanism flows into the water inlet trough and flows into the water treatment mechanism from the water inlet. The top of the water outlet wall 15 is provided with a water outlet, and a barrier 19 is provided in the water outlet. The area of ​​the pool body 1 outside the water outlet wall 15 is a water outlet trough. Water treated by the water treatment mechanism flows into the water outlet trough from the water outlet, and finally flows into the breeding mechanism from the water outlet trough.

[0043] The bottom surface of the filter pool 16 is an inclined surface, and the side of the bottom surface of the filter pool 16 close to the water inlet tank is the lower end.

[0044] A filter assembly 20 is provided in the filter pool 16, and the filter assembly 20 intercepts and filters impurities in the water. The filter assembly 20 includes a filter shell 201, which is in the shape of a rectangular parallelepiped and has a mesh structure, and is filled with filter material 202. A plurality of hanging rings 203 are provided on the top of the filter shell 201, and a movable connection assembly 21 is provided between the bottom of the filter shell 201 and the bottom of the filter pool 16. After the filter material 202 intercepts a large number of impurities, when replacement and maintenance are required due to the accumulation of dirt, the filter shell 201 is lifted out of the filter pool 16 through the hanging ring 203, and after the filter material 202 in the filter shell 201 is replaced, the filter shell 201 is lifted into the filter pool 16 through the hanging ring 203, and the filter shell 201 is fixed through the movable connection assembly 21.

[0045] The movable connection assembly 21 includes a plurality of lower support columns 211 disposed on the bottom surface of the filter tank 16, and the tops of the plurality of lower support columns 211 are in the same horizontal plane. A slot 213 is provided inwardly at the top of the lower support column 211, and the slot 213 is cylindrical and coaxial with the lower support column 211. A truncated cone-shaped guide cover 214 is coaxially provided at the top of the lower support column 211, and the smaller diameter end of the guide cover 214 is connected to the lower support column 211.

[0046] The movable connection component 21 also includes a plurality of upper support columns 212 arranged at the bottom of the filter shell 201, and the positions of the plurality of upper support columns 212 correspond to the plurality of lower support columns 211 respectively. A truncated cone-shaped guide block 215 coaxially arranged at the bottom end of the upper support column 212 and cooperating with the guide cover 214, and the larger diameter end of the guide block 215 is connected to the upper support column 212, and a plug column 216 cooperating with the slot 213 is coaxially connected to the bottom end of the guide block 215, and the bottom end of the plug column 216 and the inner end of the slot 213 are respectively provided with strong magnets 217 cooperating with each other, and the surface of the strong magnet 217 is covered with a layer of waterproof film.

[0047] When the filter shell 201 is fixed in the filter tank 16, the plurality of upper support columns 212 are roughly aligned with the lower support columns 211. During the descent of the filter shell 201, the plug column 216 first enters the guide cover 214. The guide of the guide cover 214 allows the plug column 216 to finally slide into the slot 213 to achieve alignment between the upper support column 212 and the lower support column 211. The guide block 215 also finally slides into the guide cover 214. The plug column 216 and the strong magnet 217 of the slot 213 strongly attract each other to fix the filter shell 201. When the filter shell 201 is hoisted out, the filter shell 201 is pulled by the lifting ring 203 until the plug column 216 is separated from the strong magnet 217 of the slot 213 to achieve separation of the upper support column 212 and the lower support column 211.

[0048] A horizontally arranged support net 22 is provided at the lower part of the biochemical pool 17 , and a biological filler is provided in the biochemical pool 17 above the support net 22 . The biological filler is an MBBR filler, and the model of the carrier is K5.

[0049] The gas supply mechanism includes a Roots blower 10 arranged outside the pool body 1, and a gas supply pipeline 11 connected to the Roots blower 10 is arranged outside the pool body 1. A first air intake component connected to the gas supply pipeline 11 is arranged in each breeding unit, and a second air intake component connected to the gas supply pipeline 11 is arranged in the biochemical pool 17. Air or oxygen is introduced into the gas supply pipeline 11 through the Roots blower 10.

[0050] The first air intake assembly includes a first air pipe 6 arranged in the connecting groove 3 and a plurality of second air pipes 7 arranged in the breeding groove 4. The first air pipe 6 and the plurality of second air pipes 7 are arranged horizontally, and the plurality of second air pipes 7 are arranged in a vertical line and are arranged at equal intervals. The first air pipe 6 is located at the side of the connecting groove 3 close to the breeding groove 4. The water flow at the first air pipe 6 flows obliquely upward. The first air pipe 6 is provided with a plurality of first air holes arranged parallel to the axial direction of the first air pipe 6 at equal intervals. The first air holes are located obliquely upward toward the breeding groove 4 in the circumferential direction of the first air pipe 6. The second air pipe 7 is provided with a plurality of second air holes arranged parallel to the axial direction of the second air pipe 7 at equal intervals. The second air holes are located on the side facing the water flow direction in the circumferential direction of the second air pipe 7. The first air pipe 6 and the second air pipe 7 are both connected to the air pipeline 11. Air is ejected from the first air pipe 6 and the second air pipe 7. The ejected gas increases the dissolved oxygen content of the water body and promotes the flow of the water body, which is the power source of circulating water.

[0051] The second air intake assembly includes a plurality of oxygenation pipes 18 disposed in the biochemical pool 17 below the support net 22. The plurality of oxygenation pipes 18 are parallel to each other and are disposed in the same plane at equal intervals. A plurality of air holes are evenly disposed on the top of the oxygenation pipes 18, and air bubbles are disposed in the air holes. A header connected to the plurality of oxygenation pipes 18 is disposed on the side thereof, and the header is connected to the gas transmission pipeline 11.

[0052] The utility model has a compact structure and occupies a small area. The water flows in a "mouth"-shaped circular trajectory. The water treatment mechanism is arranged on the water flow trajectory. The treated water directly continues to participate in the circulation without the need to additionally set up a return pipe and a water pump, thereby reducing costs. During the water circulation process, the remaining bait and feces in the water body sink into the sewage trough 9 and are regularly discharged through the connecting pipe 23; the aquatic products are cultured in multiple breeding units so that the aquatic products are evenly distributed in the pool body 1, and different species can be cultured in different breeding units; by setting the injection direction of air or oxygen in the pool body 1, not only the dissolved oxygen content of the water body is increased, but it can also be used as a power source to promote the circulation of the water flow; the filter component 20 is arranged to facilitate loading and unloading in the filter pool 16, convenient for the replacement or maintenance of the filter material 202, and convenient for the filter pool 16 to maintain the filtering performance.

[0053] The above embodiments are only preferred embodiments of the present utility model and are not limitations on the technical solutions of the present utility model. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present utility model.

Claims

1. A circulating aquaculture system, characterized in that: include: Pool body; The breeding mechanism and water treatment mechanism are located in the pond; A gas delivery mechanism for delivering air or oxygen into the pool; The partition wall is set inside the tank body and has a gap between its two ends and the side wall of the tank body; Wherein, the breeding mechanism comprises a plurality of breeding units arranged in a serpentine track and connected end to end in sequence, and the plurality of breeding units are respectively located on both sides of the partition wall; The water treatment mechanism is arranged between one end of the partition wall and the side wall of the pool body, and the water treatment mechanism includes a filtering pool and a biochemical pool in sequence according to the water flow direction, and the water inlet and the water outlet of the water treatment mechanism are respectively connected to the pool body on both sides of the partition wall; The gas delivery mechanism includes a Roots blower arranged outside the pool body, and a gas delivery pipeline connected to the Roots blower is arranged outside the pool body. The breeding mechanism and the water treatment mechanism are respectively provided with a first air intake component and a second air intake component connected to the gas delivery pipeline.

2. The circulating aquaculture system according to claim 1, characterized in that: The breeding unit comprises a connecting groove and a breeding groove in sequence in the direction of water flow, the bottom surface of the connecting groove is lower than the breeding groove, and a vertically arranged retaining wall is arranged in the connecting groove.

3. The circulating aquaculture system according to claim 2, characterized in that: A sewage collecting assembly is provided on the bottom surface of the breeding tank away from the connecting tank, and the sewage collecting assembly includes a plurality of sewage troughs connected in sequence, the sewage trough is in the shape of a quadrangular pyramid, and the large-diameter end is located on the bottom surface of the breeding tank, and the small-diameter end of the sewage trough faces downward, and a connecting pipe is connected below the plurality of sewage troughs, and the connecting pipe is connected to a sludge container, and a valve is provided on the pipeline between the connecting pipe and the sludge container.

4. The circulating aquaculture system according to claim 3, characterized in that: Anti-escape nets are respectively provided at both ends of the breeding tank between the sewage collection component and the connecting tank, the top of the anti-escape net is not lower than the highest water level, and the bottom of the anti-escape net is connected to the bottom surface of the breeding tank.

5. The circulating aquaculture system according to claim 2, characterized in that: The first air intake assembly includes a first air pipe arranged in the connecting groove and a plurality of second air pipes arranged in the breeding groove. The first air pipe is located on the side of the connecting groove close to the breeding groove. The first air pipe is provided with a plurality of first air holes. The first air holes are located obliquely upward toward the breeding groove in the circumferential direction of the first air pipe. The second air pipe is provided with a plurality of second air holes. The second air holes are located on the side of the second air pipe in the circumferential direction of the second air pipe facing the water flow direction.

6. The circulating aquaculture system according to claim 1, characterized in that: The water treatment mechanism includes a side wall arranged at the end of the partition wall, and the two ends of the side wall are respectively provided with an inlet wall and an outlet wall connected to the side wall of the pool body, the water inlet is arranged at the bottom of the inlet wall, and the water outlet is arranged at the top of the outlet wall. A barrier wall is also arranged between the inlet wall and the outlet wall, and its two ends are respectively connected to the partition wall and the side wall of the pool body, the filtration pool is between the barrier wall and the inlet wall, and the biochemical pool is between the barrier wall and the outlet wall.

7. The circulating aquaculture system according to claim 6, characterized in that: The bottom surface of the filter pool is an inclined surface, and the side of the bottom surface of the filter pool close to the water inlet is the lower end. A filter component is provided in the filter pool, and the filter component includes a filter shell with a mesh structure. The filter shell is filled with filter material, and a hanging ring is provided on the top of the filter shell. A movable connection component is provided between the bottom of the filter shell and the bottom of the filter pool.

8. The circulating aquaculture system according to claim 7, characterized in that: The movable connection component includes a lower support column and an upper support column which are respectively arranged on the bottom surface of the filter pool and the bottom surface of the filter shell and have corresponding positions. A slot is opened inwardly at the top end of the lower support column, and a truncated cone guide cover is provided at the top end of the lower support column. A guide block and a plug column are sequentially provided at the bottom end of the upper support column. The guide block is truncated cone-shaped to match the guide cover. The position of the plug column corresponds to the slot. The bottom end of the plug column and the inner end of the slot are provided with strong magnets that match each other.

9. The circulating aquaculture system according to claim 6, characterized in that: A horizontally arranged support net is provided at the lower part of the biochemical pool, and a biological filler is provided in the biochemical pool above the support net. The biological filler is an MBBR filler, and the model of the carrier is K5.

10. The circulating aquaculture system according to claim 9, characterized in that: The second air intake assembly includes a plurality of oxygenation pipes arranged in the biochemical pool below the support net, wherein the plurality of oxygenation pipes are parallel to each other and arranged in the same plane at equal intervals, a plurality of air holes are evenly arranged on the top of the oxygenation pipes, air bubbles are arranged in the air holes, and a header connected to the sides of the plurality of oxygenation pipes is arranged, and the header is connected to the gas pipeline.

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