CN115316331A - Land-based circulating water ecological fish culture system - Google Patents

Abstract

The invention discloses a land-based circulating water ecological fish farming system, which belongs to the technical field of aquaculture and includes an oxygen-enhancing cycle and a water treatment cycle. ‑Closed oxygenation cycle of aquaculture pond, water treatment cycle is aquaculture pond‑microfiltration machine inlet pipe‑microfiltration machine‑transfer pond cycle. The technical scheme is an independent double-circulation structure, which directly oxygenates the aquaculture water in the culture pond, has high oxygen utilization rate, faster circulation, and is convenient for independent monitoring and control of the oxygen supply pressure. The water treatment cycle is filtered by a microfilter, The transfer tank transfers and the nitrogen removal reaction tank removes ammonia nitrogen, realizes the recycling and reuse of aquaculture water, and has higher efficiency; on the one hand, this technical solution can increase the breeding density of fish, and on the other hand, because of its independent double circulation structure, it is more conducive to oxygenation Independent monitoring and control of cycle and water treatment cycle.

Description

A land-based circulating water ecological fish farming system

technical field

The invention belongs to the technical field of aquaculture, and relates to an aquaculture pond system, in particular to a land-based circulating water ecological fish farming system.

Background technique

Because of its delicious meat and rich protein content, aquatic products have higher nutritional value than other meats, and are indispensable ingredients in people's daily life. In recent years, with the gradual improvement of environmental protection requirements, in order to avoid the pollution of the reservoir and the destruction of the ecological balance of the water environment, the cage culture that traditionally relies on reservoirs, lakes, and rivers has been gradually banned, and aquaculture has gradually moved towards land-based. However, pond farming is difficult to achieve large-scale farming because of the problems of water exchange, drainage, and sewage discharge, as well as the limitations of geographical conditions. Therefore, the shift from aquaculture to land-based aquaculture and industrialized aquaculture has become a major trend in the aquaculture industry.

In the process of large-scale and industrialized fish farming, due to the high breeding density, oxygen needs to be added to the water at any time to make it survive and grow normally. And food residues are discharged to reduce the ammonia content of the water body. Recirculating aquaculture technology has long been promoted and applied in the field of land-based aquaculture. However, traditional land-based aquaculture still faces many problems. For example, on the one hand, there is a large demand for water resources. Factory farming is implemented in places far away from living water sources such as reservoirs, lakes, and rivers. The profit margin of aquatic products; on the other hand, the equipment investment cost is high, and the aeration and water circulation involved in the breeding process require continuous operation of power equipment, high energy consumption, and due to extensive management, the efficiency of oxygen use and water circulation is low.

In order to overcome this limitation, technical personnel in the field of aquaculture technology have carried out some effective explorations. For example, the Chinese utility model patent with the application number CN200820046145.5 discloses a high-quality fish pond device with double oxygenation and double sewage discharge, including a square or round The fish pond is characterized in that the bottom of the fish pond is flat-bottomed, and there is a pressure harmless water inlet pipe outside the pond to press the water into the surface of the pond and the bottom of the pond, and then pass through no less than one negative pressure oxygen-increasing jet device to discharge the water. Inject into the pool, and there is also a pressure type air pump, which presses air (oxygen) into the water through the air supply pipe and the porous air head, so that the pool water is rich in dissolved gas. At the same time, there are sewage collecting pipes and sewage pipes on the surface and bottom of the pool respectively. The fish feces and waste in the upper and lower water in the pool are discharged out of the pool, and the pool water is always kept clean and high in oxygen content, thereby improving the output and quality of fish. The characteristic of fishy smell.

Although such aquaculture method realizes the oxygenation and sewage discharge of the water in the pond, it lacks treatment for the discharged water, and there is a hidden danger of polluting the surrounding environment; at the same time, the amount of oxygenation in the aquaculture water is not easy to control, and the solid waste in the water body is not completely discharged. Moreover, harmful substances such as ammonia nitrogen dissolved in the water body during the breeding process have not been effectively treated.

Contents of the invention

In order to solve the above problems, the present invention provides a land-based circulating water ecological fish farming system, so as to achieve the effect of near zero discharge and pollution-free ecological and environmental protection factory farming.

The present invention is achieved through the following technical solutions.

A land-based circulating water ecological fish farming system, including an aeration cycle and a water treatment cycle;

The oxygenation cycle includes a culture pond, an oxygenation device, an oxygenation water inlet pipe and an oxygenation outlet pipe, the water inlet end of the oxygenation device communicates with the culture pond through the oxygenation water inlet pipe, and the discharge end of the oxygenation device The oxygen-increasing outlet pipe is connected with the culture pond to form a closed oxygen-increasing cycle of the culture pond-increasing oxygen inlet pipe-oxygenation device-increasing oxygen outlet pipe-cultivation pond; It is used to pump the water in the culture pond to the water inlet end of the aeration device to provide power for the circulation process of the aeration cycle;

The water treatment cycle includes a culture pond, a microfiltration machine inlet pipe, a microfiltration machine, a transfer tank, a nitrogen removal water inlet pipe, a nitrogen removal reaction tank, and a nitrogen removal drain pipe. The water inlet end of the microfiltration machine is connected, and the water outlet end of the microfiltration machine is connected with the transfer tank, and the transfer tank is connected with the nitrogen removal reaction tank through the nitrogen removal water inlet pipe, and the nitrogen removal reaction tank is connected with the culture pond through the nitrogen removal drain pipe. Connected to form a closed water treatment cycle of culture pond - microfiltration machine inlet pipe - microfiltration machine - transfer tank - nitrogen removal water inlet pipe - nitrogen removal reaction tank - nitrogen removal drain pipe - culture pond; There is a water supply pump for the denitrification pool at the end, which is used to provide power for the water treatment cycle.

Further, the upper section of the inner wall of the culture pond is provided with a transition pool, and the middle section of the transition pool near the inner wall of the culture pond is provided with a water inlet pipe of a microfilter, and a filter screen is provided at the water inlet end of the water inlet pipe of the microfilter; The lower part of the transition pool near the center of the culture pond is provided with a sewage pipe, the lower end of the sewage pipe opens downward and is close to the bottom of the culture pond; the outlet at the upper end of the sewage pipe is higher than the bottom of the transition pond.

Further, the outlets of the nitrogen removal drainage pipe and the oxygenation outlet pipe are both bent towards the tangential direction of the culture pond, and the bending direction is the same in the circumferential direction, and at the same time, they are inclined downward by 40-50°.

Further, a water supply pipe is provided on the edge of the culture pond, the water inlet end of the water supply pipe communicates with the water supply pond, and the outlet end of the water supply pipe communicates with the culture pond; the water outlet of the water supply pipe is bent towards the tangential direction of the culture pond, In the circumferential direction, it is the same as the bending direction of the nitrogen removal drain pipe and the oxygen enhancement outlet pipe, and is inclined downward at 40-50°.

Further, the aeration cycle also includes an aerator, and the aerator outputs air through an air main pipe; the culture pond is communicated with the air main pipe through the first aeration pipe, and the nitrogen removal reaction tank is The trachea is communicated with the main air pipe.

Further, the first aeration pipe enters the culture pond from the upper edge of the culture pond, and circles around the culture pond at the lower part of the inner wall of the culture pond to form an aeration ring pipe section, and the surface of the aeration ring pipe section is uniformly provided with a number of small hole.

Further, the second aeration pipe enters the nitrogen removal reaction tank from the upper end of the nitrogen removal reaction tank, and is vertically inserted into the bottom of the tank from the middle of the nitrogen removal reaction tank, leaving a distance between the outlet end and the bottom of the tank.

Further, a general control box is provided on one side of the culture pond, and the general control box is electrically connected to the oxygen-increasing water supply pump, the nitrogen-removing tank water supply pump, the aerator, and the microfilter, respectively.

Further, an oxygen pressure monitor is provided on the top of the master control box, and the oxygen pressure detector communicates with the oxygen increasing device through an oxygen pressure monitoring tube.

Further, the upper end of the transition pond is lower than the edge of the culture pond.

The beneficial effects of the present invention are:

①The system is an independent double-cycle structure, the oxygenation cycle and the water treatment cycle operate independently without interfering with each other; directly increase the oxygen in the culture water in the culture pond, the oxygen utilization rate is high, the cycle is faster, and it is convenient for independent monitoring and monitoring. Control the oxygen supply pressure to achieve precise control of the most important parameters in the aquaculture process; while the water treatment cycle is filtered through the microfiltration machine, transferred in the transfer tank, and removed from the nitrogen reaction tank to remove ammonia nitrogen, so as to realize the recycling and reuse of aquaculture water, which is also independent Circulation, the entire circulation can be controlled by controlling the start and stop of each pump through the master control box, which is more efficient, easy to control, and easier to achieve precise management, thereby saving energy and reducing consumption.

②This technical scheme makes full use of the principle that the rotation of the water flow in the cylinder will make the solid impurities in the water gradually gather in the middle, and the water outlet end of the water supply pipe, the water outlet end of the nitrogen removal drainage pipe and the water outlet end of the oxygen enhancement pipe are all rotated in the same direction The inclined arrangement uses the water flow to drive the entire water body to maintain a low-speed rotational flow, which is not only conducive to the rapid and uniform distribution of dissolved oxygen water, but also facilitates the rapid mixing of treated water and newly supplied water into the aquaculture water body, and at the same time makes the solids at the bottom settle. The pollutants gradually accumulate to the middle without affecting the growth of fish in the water; on this basis, the water inlet end of the sewage pipe is directly extended to the middle of the breeding pond, and the effect of atmospheric pressure is fully utilized by setting the transition tank structure. The aquaculture wastewater in the aquaculture pond is directly extracted from the bottom of the aquaculture pond through the sewage pipe, and the wastewater containing the most sediment at the bottom of the aquaculture pond can be pumped into the transition pond without setting up a power device, and then enters the microfilter for further treatment after preliminary filtration.

③This technical solution provides sufficient air aeration for the culture pond and the nitrogen removal reaction pond through the structure of the aerator and the aeration tube, and increases the air aeration in the culture pond, which can be used at the same time as the aeration cycle, which can further supplement Oxygen content in aquaculture water, thereby reducing the amount of pure oxygen and reducing oxygen costs; while air aeration in aquaculture water can improve water activity, and in the nitrogen removal reaction tank, it can promote the water body containing harmful elements such as ammonia nitrogen and biochemical balls to fully Response to ensure that the water body is clean and thorough to meet the water quality requirements for aquaculture.

④In this technical scheme, water treatment equipment such as microfiltration machine, transfer tank, and nitrogen removal reaction tank are set, and an aeration device is set at the same time to form a set of aeration and water treatment double-circulation fish farming system, and the aquaculture water is treated and processed. Recycling greatly reduces the consumption of clean water, reduces the cost of water used in land-based aquaculture, realizes near-zero discharge of aquaculture waste water, and achieves the effect of ecological and environmentally friendly farming; The height difference is formed, so that the water body flows naturally to complete the water body transfer, which greatly reduces the use of power devices and energy consumption.

Compared with the existing technology, this technical solution can increase the fish breeding density on the one hand, and on the other hand, because of its independent double-circulation structure, it is more conducive to the independent monitoring and control of the oxygenation cycle and the water treatment cycle, and it will realize finerization in the future. , Intelligent aquaculture provides convenience, and is suitable for promotion and application in industrialized and large-scale aquaculture industries.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic diagram of the arrangement structure of the sewage pipe and the first aeration pipe in the present invention.

Fig. 3 is a system block diagram of the connection of each main component in the present invention.

Fig. 4 is a schematic diagram of the height difference of each main component in the present invention.

In the figure: 1-breeding pond, 101-outlet, 102-sewage pipe, 103-transition tank, 104-filter, 2-aeration device, 3-water treatment tank, 4-oxygen pressure monitor, 5-general Control box, 6-microfiltration machine, 7-transfer tank, 8-nitrogen removal reaction tank, 9-nitrogen removal drainage pipe, 10-water supply pipe, 11-drainage pipe, 12-oxygen pressure monitoring pipe, 13-first exposure Trachea, 1301-aeration ring pipe section, 14-oxygenation water inlet pipe, 15-microfilter water inlet pipe, 16-second aeration pipe, 17-nitrogen removal water pipe, 18-oxygenation water outlet pipe, 19-increase Oxygen water supply pump, 20-water supply pump for denitrification tank, 21-air main pipe, 22-water supply tank, 23-aeration machine.

Detailed ways

The technical solution of the present invention is further described below in conjunction with the accompanying drawings, but the scope of protection is not limited to the description.

As shown in Figure 1-2, a kind of land-based circulating water ecological fish farming system according to the present invention includes an aeration cycle and a water treatment cycle;

The aeration cycle includes a culture pond 1, an oxygenation device 2, an oxygenation water inlet pipe 14 and an oxygenation outlet pipe 18, and the water inlet end of the aeration device 2 is communicated with the culture pond 1 by an oxygenation water inlet pipe 14, so that The drain end of the aeration device 2 is communicated with the culture pond 1 through the oxygen enhancement outlet pipe 18, forming a closed aeration cycle of the cultivation pond 1—the oxygenation water inlet pipe 14—the oxygenation device 2—the oxygenation outlet pipe 18—the culture pond 1 ; The oxygenation inlet pipe 14 is provided with an oxygenation water supply pump 19, which is used to pump the water in the culture pond 1 to the water inlet end of the oxygenation device 2, so as to provide power for the circulation process of the oxygenation cycle.

The water treatment cycle includes a culture pond 1, a microfilter inlet pipe 15, a microfilter 6, a transfer tank 7, a nitrogen removal water inlet pipe 17, a nitrogen removal reaction tank 8 and a nitrogen removal drain pipe 9, and the culture pond 1 passes through The water inlet pipe 15 of the microfilter is communicated with the water inlet of the microfilter 6, and the water outlet of the microfilter 6 is communicated with the transfer pool 7, and the transfer pool 7 is communicated with the nitrogen removal reaction pool 8 through the nitrogen removal inlet pipe 17 , the nitrogen removal reaction pool 8 is communicated with the culture pond 1 through the nitrogen removal drain pipe 9 to form the culture pond 1—microfilter water inlet pipe 15—microfilter machine 6—transfer pool 7—nitrogen removal water inlet pipe 17—nitrogen removal reaction Pool 8—nitrogen removal drain pipe 9—closed water treatment cycle of culture pond 1; said nitrogen removal inlet pipe 17 water inlet end is provided with nitrogen removal pool water supply pump 20 for pumping the water in the transfer pool 7 to nitrogen removal Nitrogen removal is carried out in the reaction pool 8, combined with the height difference between the nitrogen removal reaction pool 8 and the culture pool 1, power is provided for the water treatment cycle.

The system is an independent double cycle structure, the aeration cycle and the water treatment cycle operate independently without interfering with each other, and the operation efficiency is higher and more stable.

The edge of the culture pond 1 is provided with a water supply pipe 10, the inlet end of the water supply pipe 10 communicates with the water supply pond 22, and the outlet end of the water supply pipe 10 communicates with the culture pond 1; the water in the water supply pond 22 mainly comes from water treatment The sewage in the pool 3 is recycled and reused after treatment, or the external water source introduced.

The water outlets of the water supply pipe 10, the nitrogen removal drain pipe 9 and the oxygen-increasing water outlet pipe 18 are all bent toward the tangential direction of the culture pond 1, and the bending direction is the same in the circumferential direction, and simultaneously inclined downwards by 40-50°. The water body forms a certain oblique impact force, which makes the water body rotate in the culture pond 1 , forms a swirl flow inside and at the bottom of the water body, and diverts most of the sundries to the middle of the culture pond 1 and discharges them through the sewage pipe 102 .

As shown in Figure 2, the upper section of the inner wall of the culture pond 1 is provided with a transition tank 103, and the middle section of the side of the inner wall of the culture pond 103 is provided with a microfilter inlet pipe 15, and the inlet pipe 15 of the microfilter inlet pipe 15 is provided with the transition pond 103. The water end is provided with a filter screen 104, so that larger particles of impurities are filtered out; the transition tank 103 is provided with a sewage pipe 102 near the center side of the culture pond 1, and the lower end of the sewage pipe 102 is opened downward and close to the bottom of the culture pond 1 , when the water level in the culture pond 1 submerges the uppermost section of the sewage pipe 102, under the action of atmospheric pressure, the water at the bottom of the culture pond 1 will enter the transition pond 103 through the sewage pipe 102, and part of the sediment will settle in the transition pond 103, and the rest of the sewage Then pass through the filter screen 104, enter the microfilter 6 through the microfilter water inlet pipe 15, and carry out solid-liquid separation; On the other hand, try to avoid sewage backflow.

The upper end of the transition pool 103 is lower than the edge of the culture pool 1, and when the water level exceeds the upper edge of the transition pool 103, the floating objects on the surface of the culture pool 1 will also enter the transition pool 103, and be attached to the filter screen after being filtered at the filter screen 104. At 104, the sewage enters the microfilter for processing through the water inlet pipe 15.

The system is also provided with an aerator 23, and the air is output through the main air pipe 21. The culture pond 1 communicates with the air main pipe 21 through the first aeration pipe 13 , and the nitrogen removal reaction tank 8 communicates with the air main pipe 21 through the second aeration pipe 16 . The main air pipe 21 mainly plays the role of supplying air for the culture pond 1 and the nitrogen removal reaction pond 8 and increasing the aeration. By increasing the aeration, the harmful substances in the culture pond 1 and the nitrogen removal reaction pond 8 can be separated, and simultaneously The oxygen content in the water body of the culture pond 1 can be increased.

The first aeration pipe 13 enters the culture pond 1 from the upper edge of the culture pond 1, and circles around the culture pond 1 at the lower part of the inner wall of the culture pond 1 to form an aeration ring section 1301. The surface of the aeration ring section 1301 is uniform Several small holes are provided so that the air entering through the first aeration pipe 13 can be aerated evenly through the small holes.

The second aeration pipe 16 enters the nitrogen removal reaction tank 8 from the upper end of the nitrogen removal reaction tank 8, and is vertically inserted into the bottom of the tank from the middle of the nitrogen removal reaction tank 8, but there is a gap between the outlet end and the bottom of the tank, and the air passes through the second The second aeration pipe 16 enters and discharges from the outlet end of the second aeration pipe 16 to realize aeration.

The bottom of the culture pond 1 is provided with a drain outlet 101 , and the drain outlet 101 communicates with the water treatment tank 3 through a drain pipe 11 . When changing the water, the water in the culture pond 1 flows into the water treatment pond 3 through the drain pipe 11, and is discharged or recycled after sewage treatment.

Also be provided with master control box 5 in this system, described master control box 5 is positioned at the middle of every group culture pond 1, or is positioned at culture pond 1 side, is mainly used for aeration water supply pump 19, denitrification tank water supply pump 20 , aerator 23, microfiltration machine 6 and other electrical equipment are controlled to realize one-key synchronous power on or power off, with a fault prompt function, and at the same time, each electrical equipment can be independently controlled to ensure stable operation of the system.

The top of the master control box 5 is also provided with an oxygen pressure monitor 4, and the oxygen pressure detector 4 communicates with the aeration device 2 through an oxygen pressure monitoring tube 12, and is mainly used for monitoring the oxygen supply pressure of the aeration device 2 to avoid The pressure is too high or too low to achieve a reasonable control and balance of oxygen supply and cost.

All the above-mentioned pipelines are provided with valves to control the flow of water in the pipelines and to open and close the pipelines, but they are not shown in the accompanying drawings.

Example

Figure 1-2 is only a structural representation of this technical solution. The fish ponds are cylindrical, and generally every two ponds are in one group, sharing the microfiltration machine 6, the transfer pond 7, the master control box 5 and the oxygen pressure monitor 4, and are set in the open air. The specific pipelines and the layout of each water treatment device are different, but the technical ideas are within the scope of this manual; if the site permits, large-scale farming can be realized through the simultaneous operation of multiple groups of the system, and the water treatment pool 3. Water supply Pond 22, aerator 23 etc. can be shared by many groups after measuring and calculating according to scale.

Breeding pond 1 generally adopts nylon sheet thermoplastic welding to form, and its shape is generally circular, and welding seam is less, is difficult for water leakage, and the corner in the pond is few, is easy to clean, and is difficult for breeding bacteria and residual germs. Breeding pond 1 is directly installed on a flat ground with a depth of more than 1.5m. After installation, the outer ground of the culture pond is raised, and the outer surface is about 1m from the upper end of the culture pond 1. Aeration device 2 and microfilter are arranged on the raised surface. 6. The transfer pool 7, the nitrogen removal reaction pool 8, etc. make the culture pool 1 at a lower position, and the diameter of the culture pool 1 is matched according to the actual size of the site, culture density, oxygen supply capacity, water treatment capacity and other factors. After the culture pond 1 and its water treatment equipment are installed and connected, the culture pond 1 needs to be cleaned and disinfected, and then water is added to the culture pond 1. The initial water depth is just enough to submerge the sewage pipe 102 in the culture pond 1, which is lower than the transition pond 103 The edge of the upper end is good, no water leakage after inspection, and all components can be put into use after debugging.

When fish fry is put in, it is directly thrown in the culture pond 1 by the breeder, and after reaching the culture density requirement, the master control box 5 is operated, the power supply is started, and the aeration cycle and the water treatment cycle start to work.

During the breeding process of the water in the breeding pond 1, because regular feeding is required, most of the fed fish food will be eaten by the fish, and a small part will settle to the bottom of the pond and disperse. In addition, the fish will continue to excrete in the breeding pond 1 At the same time, respiration consumes oxygen, the oxygen content in the water gradually decreases, and the ammonia nitrogen content gradually increases.

Oxygenation cycle work process: as shown in Figure 1, Figure 3, and Figure 4, the oxygenation cycle includes a culture pond 1, an oxygenation device 2, an oxygenation water inlet pipe 14 and an oxygenation water outlet pipe 18, and the oxygenation water supply pump 19 is The aerobic cycle provides power to realize the normal operation of the aerobic cycle. Oxygenation device 2 includes a dissolved oxygen cone and an oxygen tank. The oxygen tank communicates with the dissolved oxygen cone through a pipeline to supply oxygen to the dissolved oxygen cone, while the water that needs to be aerated enters from the top of the dissolved oxygen cone, and returns to the Breeding pond 1. The water inlet end of the oxygen-increasing water inlet pipe 14 is in the culture pond 1, and the water inlet is positioned at the middle section of the culture pond 1, and the culture water in the culture pond 1 is pumped to the top of the oxygen-increasing device 2 by the oxygen-increasing water supply pump 19, and from the oxygen-increasing device 2 The top enters under pressure, and fully fuses with the oxygen inside the oxygen increasing device 2; The water in 2 gets back in the culture pond 1 through the oxygen-increasing water outlet pipe 18.

The working process of the water treatment cycle: as shown in Figure 1, Figure 3, and Figure 4, the water treatment cycle includes a culture pond 1, a microfilter inlet pipe 15, a microfilter 6, a transfer tank 7, a nitrogen removal inlet pipe 17, and a nitrogen removal The reaction tank 8 and the nitrogen removal drain pipe 9 provide power for the water treatment cycle through the nitrogen removal tank water supply pump 20 to realize the normal operation of the water treatment cycle. The water inlet end of the microfilter water inlet pipe 15 is communicated with the transition pool 103 of the culture pond 1, and the culture water through preliminary precipitation and filtration enters the microfilter 6 through the microfilter water inlet pipe 15 in the transition pond 103. In 6, solid impurities such as excrement and food residues are further filtered, and the filtered water enters a temporary storage area in the transfer pool 7, but this part of the water also contains a large amount of ammonia nitrogen components, which cannot be returned to the culture pool 1 for use. The water inlet end of the nitrogen removal inlet pipe 17 is connected with the nitrogen removal tank water supply pump 20, and the nitrogen removal tank water supply pump 20 is installed in the transfer tank 7, and the water separated in the transfer tank 7 is fed through the nitrogen removal by the nitrogen removal tank water supply pump 20. The water pipe 17 is introduced into the nitrogen removal reaction tank 8 for microbial nitrogen removal reaction. A large number of biochemical balls are housed in the nitrogen removal reaction tank 8. Bacterial colonies and algae for removing ammonia nitrogen, nitrite, and organic matter are distributed in the biochemical balls. Under the action of the ball, harmful substances such as ammonia nitrogen, nitrite, and organic matter in the water are degraded, and the aquaculture water meets the water quality requirements again; The height difference of the nitrogen reaction tank 8, the water in the nitrogen removal reaction tank 8 returns in the culture pond 1 from the nitrogen removal drain pipe 9.

In the culture pond 1, under the combined impact of the water supply pipe 10, the nitrogen-removing drain pipe 9 and the oxygen-increasing water outlet pipe 18, the water body in the culture pond 1 rotates, and sediments such as feed residues and fish feces in the water body gradually Gather towards the center of the culture pond 1. As shown in Figure 2, the water level in the culture pond 1 has submerged the sewage pipe 102, and under the effect of atmospheric pressure, the water in the culture pond 1 will enter the sewage pipe 102, that is, the water at the bottom of the culture pond 1 flows from the sewage pipe 102 The lower end enters the water inlet, and reaches the transition pool 103 through the sewage pipe 102; the mixed water body in the transition pool 103 is separated by sedimentation, and most of the sediment settles in the transition pool 103, and the filtered water enters the water inlet pipe of the microfiltration machine 15 in.

In the above-mentioned process, the aerator 23 works and delivers air in the air main pipe 21. After the air enters the air main pipe 21, it is divided into two branches, one enters the culture pond 1 through the first aeration pipe 13, The bottom of the pond provides aeration for the culture pond 1, as shown in Figure 2;

When the culture pond 1 completes a batch of cultivation and slaughter, the water body in the culture pond 1 needs to be replaced, and the culture pond 1 needs to be cleaned and sterilized. Now, stop the aeration cycle and the water treatment cycle, stop the water supply to the culture pond 1, open the main valve of the drain pipe 11, the culture water in the culture pond 1 enters the drain pipe 11 through the bottom drain 101, and passes through the drain pipe 11 It is discharged into the water treatment tank 3 for sedimentation and treatment, and then introduced into the water supply tank 22 for recovery and reuse. The sediment in the water treatment tank 3 is recovered together with the sediment in the transition tank 103 and the microfilter 6 for further treatment. The outlet 101 of culture pond 1 is positioned at culture pond 1 middle part, and outlet 101 place is provided with strainer, in order to prevent fish from getting stuck in drain pipe 11 from outlet 101 and get hurt, or cause blockage to drain pipe 11 and affect drainage.

During the whole aeration cycle and water treatment cycle, the pressure of oxygen is monitored by the oxygen pressure monitor 4, and a pressure sensor is arranged inside the aeration device 2, and the pressure sensor is connected to the oxygen pressure monitor 4 through the oxygen pressure monitoring tube 12. connected, the pressure gauge reading on the oxygen pressure monitor 4 can monitor the oxygen supply pressure in the oxygen increasing device 2 at any time; at the same time, the master control box 5 controls the power on and off of the whole system, controls the working mode of the microfilter 6, and controls The start and stop of power units such as oxygen-increasing water supply pump 19, denitrification tank water supply pump 20 and aerator 23, when each device breaks down, report to the police by the fault indicator light on the master control box 5, and prompt to carry out maintenance.

Considering factors such as water evaporation and fish growth needs, the water in the breeding pond 1 will naturally decrease, and the internal water circulation cannot meet the long-term breeding needs of the fish. It is necessary to add external water sources to the breeding pond 1 regularly; in case of rainy weather, the water in the breeding pond 1 Water is replenished naturally.

The above-mentioned embodiment is only exemplary, is to enable those skilled in the art to better understand the content of the technical solution, and should not be interpreted as limiting the protection scope of the present invention, as long as it is an improvement made according to the technical solution of the present invention, simple Replacement all fall within the scope of protection of the present application.

Claims (10)

1. A land-based circulating water ecological fish farming system is characterized in that: comprising an aeration cycle and a water treatment cycle; The oxygenation cycle includes a culture pond (1), an oxygenation device (2), an oxygenation inlet pipe (14) and an oxygenation outlet pipe (18), and the water inlet end of the oxygenation device (2) passes through an oxygenation The water inlet pipe (14) is communicated with the culture pond (1), and the drain end of the oxygenation device (2) is communicated with the culture pond (1) through the oxygenation outlet pipe (18), forming the culture pond (1)—oxygenation inlet Water pipe (14)—oxygenation device (2)—oxygenation outlet pipe (18)—enclosed oxygenation cycle of culture pond (1); said oxygenation inlet pipe (14) is provided with oxygenation water supply pump (19) , for pumping the water in the culture pond (1) to the water inlet end of the aeration device (2), so as to provide power for the circulation process of the aeration cycle; The water treatment cycle includes a culture pond (1), a microfilter inlet pipe (15), a microfilter (6), a transfer tank (7), a nitrogen removal inlet pipe (17), a nitrogen removal reaction tank (8) and Nitrogen removal drainpipe (9), described cultivation pond (1) is communicated with the water inlet end of microfilter (6) by microfilter inlet pipe (15), and the water outlet of described microfilter (6) is connected with the transfer The pool (7) is connected, and the transfer pool (7) is communicated with the nitrogen removal reaction pool (8) through the nitrogen removal water inlet pipe (17), and the nitrogen removal reaction pool (8) is connected with the aquaculture plant through the nitrogen removal drain pipe (9). The pools (1) are connected to form a breeding pool (1)—microfiltration machine inlet pipe (15)—microfiltration machine (6)—transfer pool (7)—nitrogen removal water inlet pipe (17)—nitrogen removal reaction pool (8) - nitrogen removal drainage pipe (9) - the closed water treatment cycle of the culture pond (1); the water inlet end of the nitrogen removal water inlet pipe (17) is provided with a nitrogen removal tank water supply pump (20), which is used to provide water treatment cycle power. 2. A land-based circulating water ecological fish farming system according to claim 1, characterized in that: a transition pool (103) is provided on the upper part of the inner wall of the culture pool (1), and the transition pool (103) is close to the culture The middle part of the inner wall side of the pool (1) is provided with a microfilter water inlet pipe (15), and the water inlet end of the microfilter water inlet pipe (15) is provided with a filter screen (104); the transition pool (103) is close to the culture pond (1) The lower part of the center side is provided with a blowdown pipe (102), and the lower end opening of the blowdown pipe (102) faces downward and is close to the bottom of the culture pond (1); the outlet at the upper end of the blowdown pipe (102) is higher than the transition tank (103 )bottom. 3. A land-based circulating water ecological fish farming system according to claim 1, characterized in that: the outlets of the nitrogen removal drain pipe (9) and the oxygenation outlet pipe (18) are bent towards the culture pond (1) in the tangential direction, and in the same bending direction in the circumferential direction, and at the same time inclined downward by 40-50°. 4. A land-based circulating water ecological fish farming system according to claim 1, characterized in that: the edge of the culture pond (1) is provided with a water supply pipe (10), and the water supply pipe (10) inlet end It is connected with the water supply pool (22), and the water outlet of the water supply pipe (10) is connected with the culture pond (1); Nitrogen drainage pipe (9), the bending direction of oxygen-increasing water outlet pipe (18) are identical, and slope downwards 40-50 ° simultaneously. 5. a kind of land-based circulating water ecological fish farming system according to claim 1, is characterized in that: described aeration circulation also comprises aerator (23), and described aerator (23) passes air main pipe ( 21) output air; the culture pond (1) is communicated with the air main pipe (21) through the first aeration pipe (13), and the nitrogen removal reaction tank (8) is connected with the air main pipe through the second aeration pipe (16) (21) CONNECTED. 6. A kind of land-based circulating water ecological fish farming system according to claim 5, characterized in that: the first aeration pipe (13) enters the culture pond (1) from the upper edge of the culture pond (1), And the lower part of the inner wall of the culture pond (1) circles around the culture pond (1) to form an aeration ring pipe section (1301), and the surface of the aeration ring pipe section (1301) is uniformly provided with a number of small holes. 7. A kind of land-based circulating water ecological fish farming system according to claim 5, characterized in that: said second aeration pipe (16) enters the nitrogen removal reaction tank (8) from the upper end of the nitrogen removal reaction tank (8) ), and vertically insert into the bottom of the pool from the middle of the nitrogen removal reaction pool (8), leaving a distance between the outlet end and the bottom of the pool. 8. A land-based circulating water ecological fish farming system according to claim 1, characterized in that: one side of the culture pond (1) is provided with a master control box (5), and the master control box (5) It is electrically connected with the aeration water supply pump (19), the nitrogen removal tank water supply pump (20), the aerator (23), and the microfilter (6). 9. A land-based circulating water ecological fish farming system according to claim 8, characterized in that: the top of the master control box (5) is also provided with an oxygen pressure monitor (4), and the oxygen pressure detector (4) communicate with the oxygen increasing device (2) through the oxygen pressure monitoring tube (12). 10. A land-based circulating water ecological fish farming system according to claim 2, characterized in that: the upper end of the transition pool (103) is lower than the edge of the culture pool (1).

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