Small high-density aquaculture system

Abstract

The utility model provides a small-sized high-density aquaculture system which comprises a body, the body is divided into an inner layer structure and an outer layer structure through a partition, the layer located on the inner side of the partition is a culture pond, the layer located on the outer side of the partition forms a water treatment area, and a center pipe is arranged in the center of the bottom of the culture pond. An automatic sewage discharging device is arranged at the bottom of the water treatment area and comprises a sewage discharging main pipe and a plurality of automatic sewage discharging pipes arranged in the water treatment area, and the sewage discharging main pipe is arranged at the bottom of the water treatment area and connected with the automatic sewage discharging pipes; a side box, a vertical flow precipitation bin, a slow flow precipitation bin, a microfiltration bin, an air floatation bin, a mixing bin, a degassing bin, a biochemical bin and a water purification bin are arranged in the water treatment area in a surrounding manner. The aquaculture water treatment device is small in size and complete in function, can effectively treat harmful substances such as impurities, organic matters and ammonia nitrogen compounds in water, can sterilize and disinfect the treated water, and realizes recycling of the aquaculture water.

Description

Technical Field

[0001] The utility model relates to the technical field of aquaculture equipment, in particular to a small high-density aquaculture system. Background Technique

[0002] Aquaculture is a production activity of artificially controlling the reproduction, cultivation and harvesting of aquatic animals and plants. Generally, it includes the whole process of growing aquatic products from fry under artificial feeding and management. Broadly speaking, it can also include the enhancement of aquatic resources. Aquaculture has methods such as extensive farming, intensive farming and high-density intensive farming. Extensive farming is to release fry in medium and small natural waters and rely entirely on natural bait to grow aquatic products, such as fish farming in lakes and reservoirs and shellfish farming in shallow seas. Intensive farming is to grow aquatic products by methods such as feeding in smaller water bodies, such as pond fish farming, cage fish farming and enclosure farming. High-density intensive farming uses methods such as flowing water, filtration, temperature control, sterilization, oxygenation and feeding high-quality bait to carry out high-density farming in small water bodies to obtain high yields, such as high-density flowing water fish farming, shrimp farming, etc.

[0003] In the process of industrialized high-density aquaculture, the quality of the water environment in the aquaculture pond is the most crucial factor for its success. In existing industrialized high-density aquaculture, a water treatment system is generally adopted. On the one hand, the bottom of the aquaculture pond is drained regularly, and after the sewage is separated into solid and liquid, the separated liquid is treated by the water treatment system and then re-discharged into the aquaculture pond. On the other hand, a water return mechanism is set in the aquaculture pond to drain the water in the aquaculture pond, and after the returned water is treated by the water treatment system, it is re-injected into the aquaculture pond to ensure the water quality environment of the aquaculture pond.

[0004] High-density recirculating aquaculture has been industrialized. Usually in the form of a factory, it requires a large investment and is not affordable for individuals and families. And for scientific research units and teaching institutions, there is no need to build an industrialized recirculating water system. And existing small recirculating aquaculture systems cannot achieve high-density aquaculture effects because they do not use industry professional technological processes. It is impossible to achieve a yield of 100-150 catties per square meter of water in existing small aquaculture systems. Therefore, in the context of the need for a fully functional automated recirculating aquaculture system in the fields of scientific research and teaching, developing a small-sized small high-density aquaculture system has good market prospects. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the utility model provides a small high-density aquaculture system, which is small in size and complete in function, can use the professional technological process of recirculating water, and intelligently processes and controls harmful substances such as ammonia nitrogen and nitrite in the water body, providing sufficient support for high-density aquaculture.

[0006] To achieve the above object, the utility model provides the following technical solutions:

[0007] A small-scale high-density aquaculture system, including a main body, which is divided into an inner and an outer layer structure by a partition. Among them, the inner layer of the partition is the aquaculture pond, and the outer layer of the partition forms a water treatment area. The bottom of the aquaculture pond is in a downward concave conical structure, and a central pipe is arranged at the center of the conical structure. Multiple water outlets are opened on the central pipe. An automatic sewage discharge device is arranged at the bottom of the water treatment area. The automatic sewage discharge device includes a sewage main pipe and multiple automatic sewage pipes arranged in the water treatment area. The sewage main pipe is arranged at the bottom of the water treatment area and is respectively connected to the multiple automatic sewage pipes. In the water treatment area, according to the water flow direction, a side box, a vertical flow sedimentation tank, a slow flow sedimentation tank, a microfiltration tank, a flotation tank, a mixing tank, a degassing tank, a biochemical tank and a water purification tank are successively arranged in a surrounding manner. An automatic sewage pipe is arranged in each of the side box, the vertical flow sedimentation tank, the slow flow sedimentation tank, the microfiltration tank, the mixing tank, the degassing tank, the biochemical tank and the water purification tank.

[0008] Furthermore, the main body is in a cylindrical structure and is installed on a base. The diameter of the base is smaller than that of the main body. A circular water storage tank is arranged around the outside of the base, and clear water is loaded in the water storage tank. The aquaculture pond is connected to the water storage tank through a water supply pipe.

[0009] Furthermore, the automatic sewage pipe includes a sewage discharge conduit and a movable pipe. The sewage discharge conduit is installed at the bottom end of each chamber, and the lower end of the sewage discharge conduit is communicated with the sewage main pipe. A plurality of sewage outlets are opened on the peripheral wall of the lower end of the sewage discharge conduit. The movable pipe is arranged inside the sewage discharge conduit and can move up and down along the sewage discharge conduit. A piston is connected to the lower end of the movable pipe.

[0010] Furthermore, the side box is arranged outside the partition. The side box is used to discharge the surface water body of the aquaculture pond. The side box is a box body structure, and its top end is flush with the top end of the partition. An inlet is opened at the connection between the partition and the side box, and the position of the inlet is lower than the top end of the partition. The water body in the aquaculture pond enters the side box through the inlet. A cleaning mechanism is arranged in the side box. The vertical flow sedimentation tank is connected to the central pipe and the side box respectively through pipelines. The slow flow sedimentation tank is arranged on one side of the vertical flow sedimentation tank. A partition is arranged between the slow flow sedimentation tank and the vertical flow sedimentation tank. An opening is arranged at the upper end of the partition. The surface water in the vertical flow sedimentation tank flows into the slow flow sedimentation tank through the opening at the upper end of the partition. Two filter plates with through holes are arranged in the slow flow sedimentation tank, and the two filter plates are arranged at a certain interval.

[0011] Furthermore, the microfiltration tank is arranged on one side of the slow flow sedimentation tank. The microfiltration tank is communicated with the upper middle part of the slow flow sedimentation tank through a pipeline. A non-powered microfilter is arranged in the microfiltration tank. A backwashing device is arranged at the upper end of the non-powered microfilter. A centrifugal pump is arranged at the bottom end of the microfiltration tank. The centrifugal pump is connected to the backwashing device through a pipeline. The centrifugal pump pumps the water body at the bottom of the microfiltration tank to clean the non-powered microfilter by using the backwashing device.

[0012] Furthermore, the air flotation tank is arranged on one side of the microfiltration tank. The height of the air flotation tank is between one-half and three-fifths of the height of the microfiltration tank. The air flotation tank is connected to the microfiltration tank through a pipeline. Multiple air diffuser pipes are arranged at the bottom of the air flotation tank, and the air diffuser pipes are connected to an external air pump. A foam collector is arranged in the air flotation tank, and the foam collector is connected to the sewage main pipe through a pipeline.

[0013] Furthermore, the mixing tank is arranged on one side of the air flotation tank. The mixing tank is connected to the air flotation tank through a pipeline. A jet pump is arranged in the mixing tank. An ozone generator is arranged on the inner and outer sides of the mixing tank, and the ozone generator is connected to the jet pump. An observation window is opened on the outer wall of the mixing tank for observing the situation inside the mixing tank.

[0014] Furthermore, the degassing tank is arranged on one side of the mixing tank. The degassing tank is connected to the mixing tank through a pipeline. Multiple air diffuser pipes are arranged at the bottom of the degassing tank, and the air diffuser pipes are connected to an external air pump. The biochemical tank is arranged on one side of the degassing tank. The biochemical tank is connected to the degassing tank through a pipeline. The biochemical tank is filled with packing. Multiple air diffuser pipes are also arranged at the bottom of the biochemical tank, and the air diffuser pipes are connected to an external air pump.

[0015] Furthermore, the water purification tank is arranged between the vertical flow sedimentation tank and the biochemical tank. The water purification tank has the same height as the biochemical tank. The water purification tank is connected to the biochemical tank through a pipeline. The water body in the biochemical tank enters the water purification tank through a pipeline. The water purification tank is connected to the aquaculture pond through a pipeline.

[0016] Furthermore, the mixing tank has the same height as the degassing tank, the biochemical tank, and the water purification tank. The tops of the mixing tank, the degassing tank, the biochemical tank, and the water purification tank form an observation platform. A ladder is arranged outside the water treatment area, and the upper end of the ladder is connected to the observation platform.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] The present utility model is small in size and complete in function. By designing the main body into a two-layer structure of an aquaculture pond and a water treatment area, and the water treatment area is arranged around the outside of the aquaculture pond, it can effectively save space. At the same time, it can effectively remove harmful substances such as impurities, organic matter, and ammonia nitrogen compounds in the water, and can also disinfect and sterilize the treated water body, realizing the recycling use of the aquaculture water body, meeting the use requirements in the directions of individuals, families, scientific research, teaching, etc. It has low use cost, small floor area, convenient operation, and realizes the high-density aquaculture effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the front view of the present utility model;

[0020] Figure 2 It is the top view of the present utility model;

[0021] Figures 3 - 6 This is the schematic side view structure of the present utility model;

[0022] Figure 7 This is the schematic structure of the automatic sewage discharge pipe. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] As Figure 1 、 Figure 2 shown, a small-scale high-density aquaculture system includes a main body 1. The main body 1 is of a cylindrical structure and is installed on a base 11. The diameter of the base 11 is smaller than that of the main body 1. A circular water storage tank 14 is provided around the outside of the base 11. The water storage tank 14 is filled with clean water. The main body 1 is divided into an inner and an outer layer structure by a partition 13. Among them, the inner layer inside the partition 13 is a breeding pond 101 for breeding fish bodies. The diameter of the breeding pond 101 is 2-3 meters. The breeding pond 101 is connected to the water storage tank 14 through a water supply pipe 141. The clean water in the water storage tank 14 enters the breeding pond 101 through the water supply pipe 141. The outer layer outside the partition 13 forms a water treatment area 102 for installing various filtering devices to treat the breeding water flowing out of the breeding pond 101.

[0025] The bottom of the breeding pond 101 is of a downwardly concave conical structure. A central pipe 12 is provided at the center of the conical structure. A plurality of water outlets are provided on the central pipe 12. The central pipe 12 is used to discharge the water body in the middle and lower layers of the breeding pond 101. The dirt at the bottom of the breeding pond 101, such as residual bait, fish feces, etc., is also discharged through the central pipe 12 together.

[0026] An automatic sewage discharge device is provided at the bottom of the water treatment area 102. The automatic sewage discharge device includes a sewage main pipe 15 and multiple automatic sewage pipes 16 arranged in the water treatment area 102. The sewage main pipe 15 is arranged at the bottom of the water treatment area 102. The sewage main pipe 15 is respectively connected to multiple automatic sewage pipes 16 and is used for collecting the dirt collected by the central pipe 12 and the automatic sewage pipes 16. In the water treatment area 102, according to the water flow direction, a side box 2, a vertical flow sedimentation tank 3, a slow flow sedimentation tank 4, a microfiltration tank 5, a flotation tank 6, a mixing tank 7, a degassing tank 8, a biochemical tank 9 and a purified water tank 10 are sequentially arranged in a surrounding manner. An automatic sewage pipe 16 is arranged in each of the side box 2, the vertical flow sedimentation tank 3, the slow flow sedimentation tank 4, the microfiltration tank 5, the mixing tank 7, the degassing tank 8, the biochemical tank 9 and the purified water tank 10. As Figure 7 shown, the automatic sewage pipe 16 includes a sewage discharge conduit 161 and a movable pipe 162. The sewage discharge conduit 161 is installed at the bottom end of each chamber. The lower end of the sewage discharge conduit 161 is communicated with the sewage main pipe 15. A plurality of sewage discharge ports 163 are opened on the peripheral body of the lower end of the sewage discharge conduit 161. The movable pipe 162 is arranged inside the sewage discharge conduit 161 and can move up and down along the sewage discharge conduit 161. A piston 164 is connected to the lower end of the movable pipe 162. The piston 164 can seal the water body. When the piston 164 is pulled to move above the sewage discharge port 163, the sewage discharge port 163 is communicated with the sewage discharge conduit 161, and impurities together with the water body enter the sewage discharge conduit 161 through the sewage discharge port 163 and then enter the sewage main pipe 15 for discharge.

[0027] As Figures 3 - 6 shown, the side box 2 is arranged outside the partition 13. The side box 2 is used for discharging the surface water body of the aquaculture pond 101. The dirt contained in the surface water body, such as residual bait, fish feces, oil film, etc., is discharged together with the surface water body. The side box 2 is a box body structure, and its top end is flush with the top end of the partition 13. An inlet is opened at the connection between the partition 13 and the side box 2. The position of the inlet is lower than the top end of the partition 13. The water body in the aquaculture pond 101 enters the side box 2 from the inlet. Preferably, a cleaning mechanism 21 is arranged in the side box 2 for regularly cleaning the side box 2. The cleaning mechanism 21 can be common devices such as a brush or a high-pressure spray head, which can be selected and set according to needs and will not be described in detail here. Based on the above structure, the bottom water in the aquaculture pond 101 flows out from the central pipe 12, and the surface water flows out from the side box 2 and enters the water treatment area 102 outside the aquaculture pond 101 through water pipes respectively.

[0028] The vertical flow sedimentation tank 3 is connected to the central pipe 12 and the side box 2 through pipelines respectively. The bottom water flowing out from the central pipe 12 and the surface water flowing out from the side box 2 converge and flow into the vertical flow sedimentation tank 3. The vertical flow sedimentation tank 3 is used for precipitating large particles such as residual bait and fish feces in the water body. The precipitated particles are discharged into the sewage main pipe 15 through the automatic sewage pipe 16.

[0029] The slow-flow sedimentation bin 4 is arranged on one side of the vertical-flow sedimentation bin 3. A partition is provided between the slow-flow sedimentation bin 4 and the vertical-flow sedimentation bin 3. An opening is provided at the upper end of the partition. The surface water in the vertical-flow sedimentation bin 3 flows into the slow-flow sedimentation bin 4 through the opening at the upper end of the partition. Two filter plates 41 with through holes are arranged in the slow-flow sedimentation bin 4. The two filter plates 41 are arranged at a certain interval. The filter plates 41 can further precipitate fine dirt. The precipitated dirt is discharged into the sewage main pipe 15 through the automatic sewage discharge pipe 16.

[0030] The microfiltration bin 5 is arranged on one side of the slow-flow sedimentation bin 4. The microfiltration bin 5 is connected to the upper middle part of the slow-flow sedimentation bin 4 through a pipeline. The surface water body in the slow-flow sedimentation bin 4 enters the microfiltration bin 5 through the pipeline. A non-powered microfilter 51 is arranged in the microfiltration bin 5. The non-powered microfilter 51 filters the water body with a 200-mesh filter screen. An anti-flushing device 52 is arranged at the upper end of the non-powered microfilter 51. A centrifugal pump (not shown in the figure) is arranged at the bottom end of the microfiltration bin 5. The centrifugal pump is connected to the anti-flushing device 52 through a pipeline. The centrifugal pump pumps the water body at the bottom of the microfiltration bin 5 to clean the non-powered microfilter 51 by using the anti-flushing device 52 to remove the dirt attached to the non-powered microfilter 51. The flushed dirt is discharged into the sewage main pipe 15 through the automatic sewage discharge pipe 16.

[0031] The air flotation bin 6 is arranged on one side of the microfiltration bin 5. The height of the air flotation bin 6 is between one-half and three-fifths of the height of the microfiltration bin 5. The air flotation bin 6 is connected to the microfiltration bin 5 through a pipeline. The water filtered by the non-powered microfilter 51 enters the air flotation bin 6 through the pipeline. A plurality of aeration pipes (not shown in the figure) are arranged at the bottom of the air flotation bin 6. The aeration pipes are connected to an external air pump. When the aeration pipes work, a large number of bubbles are generated. The bubbles can bring organic matters in the water, such as suspended colloids, cellulose, protein, residual baits and feces, etc. to the water surface for aggregation. A foam collector 61 is arranged in the air flotation bin 6. The polluted bubbles aggregated on the water surface are collected by the foam collector 61. The foam collector is connected to the sewage main pipe 15 through a pipeline. The dirt collected by the foam collector is discharged through the sewage main pipe 15.

[0032] The mixing bin 7 is arranged on one side of the air flotation bin 6. The mixing bin 7 is connected to the air flotation bin 6 through a pipeline. A jet pump is arranged in the mixing bin 7. An ozone generator is arranged on the inner and outer sides of the mixing bin 7. The ozone generator is connected to the jet pump. The water body in the air flotation bin 6 enters the mixing bin 7 through the jet pump. The ozone generator generates ozone. When the water body enters the mixing bin 7 through the jet pump, the ozone generator injects ozone at the same time to make the water and ozone fully mixed, playing a role in disinfection and sterilization. An observation window 71 is opened on the outer wall of the mixing bin 7 for observing the situation inside the mixing bin 7.

[0033] The degassing bin 8 is arranged on one side of the mixing bin 7. The degassing bin 8 is connected to the mixing bin 7 through a pipeline. A plurality of air diffuser pipes (not shown in the figure) are arranged at the bottom of the degassing bin 8. The air diffuser pipes are connected to an external air pump. When the air diffuser pipes work, a large number of bubbles are generated. The bubbles can eliminate the ozone in the water and the nitrogen gas generated by the cultured fish as the bubbles rise. The degassing bin 8 and the air flotation bin 6 use the same air pump. When in use, the air pump can supply air to the degassing bin 8 or the air flotation bin 6 separately.

[0034] The biochemical bin 9 is arranged on one side of the degassing bin 8. The biochemical bin 9 is connected to the degassing bin 8 through a pipeline. The biochemical bin 9 is filled with packing materials. The packing materials are biological film sheet packing materials. The biological film sheet packing materials contain nitrifying bacteria. The nitrifying bacteria can purify the ammonia nitrogen compounds in the water. Further, a plurality of air diffuser pipes (not shown in the figure) are also arranged at the bottom of the biochemical bin 9. The air diffuser pipes are connected to an external air pump. When the air diffuser pipes work, a large number of bubbles are generated. The biological film sheet packing materials tumble in the water, thereby increasing the chance of contact between the biological film sheet packing materials and the water body, and thus improving the purification efficiency.

[0035] The water purification bin 10 is arranged between the vertical flow sedimentation bin 3 and the biochemical bin 9. The water purification bin 10 is at the same height as the biochemical bin 9. The water purification bin 10 is connected to the biochemical bin 9 through a pipeline. The water body in the biochemical bin 9 enters the water purification bin 10 through the pipeline. The water purification bin 10 is used to hold the purified water body. The water purification bin 10 is connected to the culture pond 101 through a return water pipe 110. The water in the water purification bin 10 enters the culture pond 101 through a pump body.

[0036] The mixing bin 7 is at the same height as the degassing bin 8, the biochemical bin 9 and the water purification bin 10. The tops of the mixing bin 7, the degassing bin 8, the biochemical bin 9 and the water purification bin 10 form an observation platform. An operator standing on the observation platform can observe the situation in the culture pond 101. Preferably, a ladder 17 is arranged outside the water treatment area 102. The upper end of the ladder 17 is connected to the observation platform, and the lower end is fixed on the ground. The operator can climb up to the observation platform from the ladder 17 for convenient observation. To ensure the safety of the operator, a guardrail 18 is installed outside the observation platform to prevent the operator from accidentally falling.

[0037] The working principle of the present utility model is as follows:

[0038] The small fully automatic aquaculture system is designed to be circular and is divided into two layers. The inner layer is a culture pond 101 with a diameter of 2.5 meters. A central pipe 12 is provided in the culture pond 101. A plurality of water outlets are opened on the central pipe 12. The central pipe 12 is used to export the water body in the lower layer of the culture pond 101. The dirt at the bottom of the culture pond 101, such as residual bait, fish feces, etc., is also discharged through the central pipe 12. The water body in the culture pond 101 enters the side box 2 from the water inlet. The dirt contained in the surface water body, such as residual bait, fish feces, oil film, etc., is discharged together with the surface water body. The bottom water in the culture pond 101 flows out from the central pipe 12, and the surface water flows out from the side box 2 and enters the vertical flow sedimentation tank 3 through water pipes respectively. The large particles such as residual bait and fish feces in the water body are precipitated by the vertical flow sedimentation tank 3, and the dirt enters the automatic sewage discharge pipe and is discharged; the surface water in the vertical flow sedimentation tank 3 flows into the slow flow sedimentation tank 4. The slow flow sedimentation tank 4 has two perforated partitions, and the partitions can further precipitate the fine dirt. The dirt is discharged regularly and enters the automatic sewage discharge pipe and is discharged; the aquaculture water then enters the microfiltration tank 5 from the slow flow sedimentation tank 4 and is filtered by a 200-mesh filter screen of the non-powered microfilter 51. The dirt enters the automatic sewage discharge pipe and is discharged. The filtered water then enters the air flotation tank 6. A large number of bubbles are generated by the aeration pipe at the bottom of the air flotation tank 6, similar to the function of a protein skimmer. The bubbles can bring the organic matter in the water, such as suspended colloids, cellulose, protein, residual bait and feces, etc., to the water surface to gather. The polluted bubbles on the water surface are collected by the foam collector and enter the automatic sewage discharge pipe and are discharged; the filtered water then comes to the mixing tank 7. There is a jet pump in the mixing tank 7 that will inject ozone at the same time, so that the water and ozone are fully mixed to play a role in disinfection and sterilization; the water body after disinfection and sterilization comes to the degassing tank 8. A large number of bubbles are generated by the aeration pipe at the bottom of the degassing tank 8. The bubbles can eliminate the ozone in the water as the bubbles rise. Then the water body comes to the biochemical tank 9. There is a biological membrane sheet filler filled with 50% of the water volume of the biochemical tank 9 in the biochemical tank 9. A large number of bubbles are generated by the aeration pipe at the bottom of the biochemical tank 9, and the biological membrane sheet filler tumbles in the water. The digestive bacteria in the biological membrane sheet filler can purify the ammonia nitrogen in the water. The purified water then comes to the water purification tank 10 and is pumped back to the culture pond 101 through the water return pipe, and enters the culture pond 101 to form a circular water push, completing a purification cycle. If the water volume in the culture pond 101 is insufficient due to sewage discharge, the control system will pump water from the water storage tank 14 back to the culture pond 101 to make up the water.

[0039] The utility model is small in volume and complete in function. By designing the main body into a two-layer structure of a breeding pond and a water treatment area, with the water treatment area surrounding the outside of the breeding pond, it can effectively save space. At the same time, the water treatment area is provided with chambers such as side boxes, vertical flow sedimentation bins, slow flow sedimentation bins, microfiltration bins, air flotation bins, mixing bins, degassing bins, biochemical bins and water purification bins, which can effectively remove harmful substances such as impurities, organic matter and ammonia nitrogen compounds in the water, and can also disinfect and sterilize the treated water body, realizing the recycling of the breeding water body, meeting the use requirements in the directions of individuals, families, scientific research, teaching, etc. It has low use cost, small floor area, convenient operation and realizes the effect of high-density breeding.

[0040] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A small-scale high-density aquaculture system, comprising a body, characterized in that: The main body is divided into an inner and outer two-layer structure by a partition, wherein the layer located on the inner side of the partition is a breeding pond, and the layer located on the outer side of the partition constitutes a water treatment area. The bottom of the breeding pond is a downwardly concave conical structure, and a central pipe is arranged at the center of the conical structure, and a plurality of water outlets are opened on the central pipe. An automatic sewage discharge device is arranged at the bottom of the water treatment area, and the automatic sewage discharge device comprises a sewage main pipe and a plurality of automatic sewage pipes arranged in the water treatment area. The sewage main pipe is arranged at the bottom of the water treatment area, and the sewage main pipe is connected to the plurality of automatic sewage pipes respectively. In the water treatment area, according to the flow direction of water, side boxes, vertical flow sedimentation bins, slow flow sedimentation bins, microfiltration bins, flotation bins, mixing bins, degassing bins, biochemical bins and water purification bins are arranged in sequence, and an automatic sewage discharge pipe is arranged in each of the side boxes, vertical flow sedimentation bins, slow flow sedimentation bins, microfiltration bins, mixing bins, degassing bins, biochemical bins and water purification bins.

2. The small-scale high-density aquaculture system according to claim 1, characterized in that: The main body is a cylindrical structure, which is installed on a base. The diameter of the base is smaller than the diameter of the main body. A circular water storage tank is arranged around the outside of the base. The water storage tank is filled with clean water, and the breeding pond is connected to the water storage tank through a water supply pipe.

3. The small-scale high-density aquaculture system according to claim 1, characterized in that: The automatic sewage pipe includes a sewage discharge conduit and a movable pipe. The sewage discharge conduit is installed at the bottom of each chamber. The lower end of the sewage discharge conduit is connected to the sewage main pipe. A plurality of sewage discharge ports are opened around the lower end of the sewage discharge conduit. The movable pipe is arranged inside the sewage discharge conduit and can move up and down along the sewage discharge conduit. A piston is connected to the lower end of the movable pipe.

4. The small-scale high-density aquaculture system according to claim 1, characterized in that: The side box is arranged on the outside of the partition. The side box is a box body structure, and its top is flush with the top of the partition. A water inlet is provided at the connection between the partition and the side box, and the water inlet is located lower than the top of the partition. A cleaning mechanism is provided in the side box. The vertical flow sedimentation bin is connected to the central pipe and the side box through pipelines respectively. The slow flow sedimentation bin is arranged on one side of the vertical flow sedimentation bin. A partition is provided between the slow flow sedimentation bin and the vertical flow sedimentation bin, and an opening is provided at the upper end of the partition. Two filter plates with through holes are provided in the slow flow sedimentation bin, and the two filter plates are arranged at a certain interval.

5. The small-scale high-density aquaculture system according to claim 1, characterized in that: The microfiltration bin is arranged on one side of the slow-flow sedimentation bin, and the microfiltration bin is connected with the middle and upper part of the slow-flow sedimentation bin through a pipeline. An unpowered microfilter is arranged in the microfiltration bin, and a backwashing device is arranged at the upper end of the unpowered microfilter. A centrifugal pump is arranged at the bottom end of the microfiltration bin, and the centrifugal pump is connected to the backwashing device through a pipeline.

6. The small-scale high-density aquaculture system according to claim 1, characterized in that: The flotation bin is arranged on one side of the microfiltration bin, and the height of the flotation bin is between one-half and three-fifths of the height of the microfiltration bin. The flotation bin is connected to the microfiltration bin through a pipeline. A plurality of aeration pipes are arranged at the bottom of the flotation bin, and the aeration pipes are connected to an external air pump. A foam collector is arranged in the flotation bin, and the foam collector is connected to the sewage main pipe through a pipeline.

7. The small-scale high-density aquaculture system according to claim 1, characterized in that: The mixing chamber is arranged on one side of the air flotation chamber, the mixing chamber and the air flotation chamber are connected by a pipeline, a jet pump is arranged in the mixing chamber, an ozone generator is arranged inside and outside the mixing chamber, the ozone generator is connected to the jet pump, and an observation window is opened on the outer wall of the mixing chamber.

8. The small-scale high-density aquaculture system according to claim 1, characterized in that: The degassing bin is arranged on one side of the mixing bin, and the degassing bin is connected to the mixing bin through a pipeline. A plurality of aeration pipes are arranged at the bottom of the degassing bin, and the aeration pipes are connected to an external air pump. The biochemical bin is arranged on one side of the degassing bin, and the biochemical bin is connected to the degassing bin through a pipeline. The biochemical bin is filled with fillers, and a plurality of aeration pipes are also arranged at the bottom of the biochemical bin, and the aeration pipes are connected to an external air pump.

9. The small-scale high-density aquaculture system according to claim 1, characterized in that: The clean water tank is arranged between the vertical flow sedimentation tank and the biochemical tank, the clean water tank and the biochemical tank are at the same height, the clean water tank is connected to the biochemical tank through a pipeline, and the clean water tank is connected to the breeding pond through a pipeline.

10. The small-scale high-density aquaculture system according to claim 1, characterized in that: The mixing bin has the same height as the degassing bin, the biochemical bin and the water purification bin, and the tops of the mixing bin, the degassing bin, the biochemical bin and the water purification bin form an observation platform. A ladder is arranged outside the water treatment area, and the upper end of the ladder is connected to the observation platform.

Images