Multipurpose circulating water fish egg hatching system and hatching method

Abstract

The invention relates to a multipurpose circulating water fish egg hatching system and method, and the system comprises a hatching module and a water treatment module, and the hatching module is composed of a plurality of hatching units used for hatching fish eggs. The water treatment module is composed of a filtering unit used for removing solid impurities, a water storage unit used for killing and regulating water temperature, a biological treatment unit used for removing ammonia nitrogen and nitrite nitrogen, and an oxygenation unit used for oxygenation and secondary killing. The units are mutually connected through pipelines, the structure is simple, and assembling is easy; the hatching unit can be matched with a hanging frame or a hanging net to be used for hatching various fish eggs; the roes are hatched with circulating water, and more than 90% of water resources can be saved compared with a traditional roe hatching mode; the whole hatching system is totally closed and self-circulated, and hatching water is filtered, denitrified, oxygenated and sterilized twice, so that the hatching system is environment-friendly and controllable; in the hatching system, only water in front of the biological treatment unit needs to be conveyed to the position above a biological bag through a circulating pump, circulating water is conveyed at other positions through gravitational potential energy, and the hatching system has the advantages of being environmentally friendly, energy-saving and water-saving.

Description

Technical Field

[0001] The present invention relates to the technical field of fish egg hatching, in particular to a multi-purpose circulating water fish egg hatching system and a hatching method. Background Art

[0002] Naturally hatched fish eggs float and develop in rivers, ensuring good water quality. However, artificial incubation requires a certain amount of water flow to maintain water quality, remove waste products such as carbon dioxide released during respiration, and prevent the eggs from sinking and accumulating. Failure to do so can easily lead to delayed embryonic development, deformities, or even death. Flowing water also stimulates the secretion of hatching enzymes, causing the fry to hatch prematurely. Therefore, artificial incubation of fish eggs currently generally uses flowing water. However, flowing water incubation is associated with high water consumption, high water quality requirements, and susceptibility to environmental influences. Therefore, fully enclosed, efficient, environmentally friendly, and controllable circulating water incubation systems have become a new solution for fish egg incubation. Based on characteristics such as specific gravity and viscosity, fish eggs can be divided into floating eggs, drifting eggs, sticky eggs, and sinking eggs. Currently, circulating water incubation systems are generally complex, expensive, and limited in purpose, often only able to hatch one or two types of fish eggs. For example, Patent No. ZL202310567135.5 describes a water-saving circulating incubation device and method for fish sticky eggs. To address these issues, a multi-purpose circulating water fish egg incubation system and method are proposed. Summary of the Invention

[0003] In order to overcome the problems in the prior art of traditional artificial flow-water incubation that the water consumption is extremely high and the water quality requirements are high and the system is easily affected by the external environment, and the circulating water incubation system is generally complex in structure, high in cost and relatively single in purpose, the present invention provides a multi-purpose circulating water fish egg incubation system and incubation method, which have the characteristics of simple structure and easy assembly, high mechanical strength, thermal insulation, small footprint, suitable for incubating various types of fish eggs, environmental protection and controllable, green, energy-saving and water-saving, non-toxic and pollution-free, and durable.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A multi-purpose circulating water fish egg hatching system, characterized by comprising a hatching module and a water treatment module;

[0006] The incubation module includes a plurality of identical incubation units, and the water treatment module includes a filtration unit, a water storage unit, a biological treatment unit and an oxygenation unit, and the units are interconnected through pipelines.

[0007] The hatching unit includes a hatching area, a water inlet pipeline and a water return pipeline;

[0008] The incubation area includes an incubation pool, a fixing frame and supporting legs, wherein the fixing frame is arranged on the inner wall of the incubation pool, and the supporting legs are fixed to the bottom of the incubation pool;

[0009] The water inlet pipeline includes a water inlet pipe, a water inlet valve, a water guide pipe, a water delivery pipe, a water outlet pipe and a water outlet hole. The water inlet pipe is connected to the water guide pipe, the water delivery pipe and the water outlet pipe in sequence. The water inlet pipe is arranged above the incubation pool and is perpendicular to the upper edge of the incubation pool. The water inlet valve is arranged on the water inlet pipe. The water guide pipe is arranged on the side wall of the incubation pool. The water outlet pipe is arranged at the center of the bottom surface of the incubation pool. Two rows of parallel water outlet holes are arranged on the side facing the water body. The water guide pipe and the water outlet pipe are connected through the water delivery pipe.

[0010] The return water pipeline includes a return water hole, a return water pipe and a return water port. The return water hole is provided on the bottom surface of the hatching pool. The return water pipe passes through the return water hole to connect the inside and outside of the hatching pool. The return water port is an opening of the return water pipe on the inner side of the hatching pool. The other end of the return water pipe leads to the filter unit.

[0011] The filtration unit is a rotary drum microfilter and connecting pipelines. The rotary drum microfilter includes a microfilter housing, a rotary drum is arranged inside the microfilter housing, the pore size of the rotary drum filter plate is 48 μm, and a water inlet hole 1 and a sewage hole are arranged at one end of the microfilter housing. The water inlet hole 1 is connected to the return pipe, and the sewage pipe passes through the sewage hole to the outside world. A drainage hole 1 is arranged at the other end of the microfilter housing, and the drainage pipe 1 passes through the drainage hole 1 to the water storage unit.

[0012] The water storage unit includes a water reservoir, an air source heat pump, a water quality monitoring system, a hydroxyl free radical generator and connecting pipelines. The water reservoir is a circular conical bottom water tank with a water inlet hole 2, a water delivery hole and a drainage hole 2 on the side wall. The water inlet hole 2 is connected to the drainage pipe 1. The water delivery hole is connected to the air source heat pump, the water quality monitoring system and the hydroxyl free radical generator through a water delivery pipe. The drainage pipe 2 is connected to the drainage hole 2 and the circulation pump in turn, leading to the biological treatment unit.

[0013] The biological treatment unit is a biological bag and connecting pipelines. A porous partition is arranged horizontally inside the biological bag to divide the interior of the biological bag into a biological reaction area and a water storage area. Multiple disc-type microporous aerators are evenly laid on one side of the porous partition biological reaction area. Biological fillers are placed in the biological reaction area. The biological fillers are selected from K3 and polyurethane fillers, and the side length is less than the aperture of the porous partition. A drainage hole 3 is provided on the side wall of the water storage area. The drainage pipe 3 is connected to the drainage hole 3 and leads to the oxygenation unit.

[0014] The oxygenation unit includes a U-shaped tube consisting of a left tube, a right tube and a connecting tube, a multi-point oxygenation device, an ultraviolet disinfection device and a connecting pipeline. The left tube and the right tube are both semi-buried in design, with the height of the above-ground part: the height of the underground part = 2:2.5, the diameter of the left tube: the diameter of the right tube = 1:5, and a water inlet hole 3 is provided on the upper tube wall of the right tube. The water inlet hole 3 is connected to the drain pipe 3. The multi-point oxygenation device is provided at the bottom of the right tube, and the ultraviolet disinfection device is provided in the middle of the left tube, including 6 ultraviolet lamps arranged in a circumferential direction along the inner wall of the left tube. The upper tube wall of the left tube is provided with a drainage hole 4, and the drainage pipe 4 is connected to the drainage hole 4, leading to the water inlet pipe of the incubation unit.

[0015] The multi-point oxygenation device includes a multi-layer support frame, which uses a microporous mesh plate as an interlayer. A nano-oxygenation disk is arranged on each interlayer, and the nano-oxygenation disk is provided with evenly distributed nano-oxygenation holes. The nano-oxygenation disk is connected to the oxygen tank through an oxygen supply pipe.

[0016] Preferably, the incubation unit can be used in conjunction with a hanging frame or a hanging net, the hanging frame and the hanging net are fixed to the fixing frame by cable ties, and a transverse fixing rope with both ends connected to the fixing frame is arranged above the hanging frame and the hanging net.

[0017] Preferably, the hatching pool, the supporting legs, the water reservoir, the biological bag, the left pipe, the right pipe, and the connecting pipe are made of fiberglass; the fixing frame, the horizontal fixing rope, the microfiltration machine housing, the rotating drum, the circulating pump, the multi-layer supporting frame, and the partition are made of stainless steel; the water inlet pipe, the water inlet valve, the water guide pipe, the water supply pipe, the water outlet pipe, the return pipe, the hanging frame, the cable tie, the hanging net, the sewage pipe, the drain pipe 1, the drain pipe 2, the drain pipe 3, and the drain pipe 4 are made of polyethylene, polyvinyl chloride, or polypropylene.

[0018] A multi-purpose circulating water fish egg hatching method, the hatching steps are as follows:

[0019] Step 1: according to the properties of the fish eggs, the floating eggs and the drifting eggs are directly placed in the hatching pond for hatching, the ordinary sinking eggs are placed in the hanging frame for hatching, and the sticky eggs are placed in the hanging net for hatching;

[0020] Step 2: Circulating water enters the hatching unit from the water inlet pipe and is transported to the bottom of the hatching pool through the water guide pipe. The transported circulating water impacts the water surface from the water outlet in the form of a micro-flow, thereby stimulating the hatching of fish eggs in the hatching pool. The flow rate of the micro-flow can be adjusted by the water inlet valve.

[0021] Step 3: replenishing circulating water with appropriate water temperature, dissolved oxygen, ammonia nitrogen content, and nitrite content into the hatching pond through a micro-flow, so that the circulating water covers the surface of the fish eggs and ensures that the fish eggs are in a suitable hatching environment;

[0022] Step 4: Driven by the micro-water flow, a large amount of solid impurities and sewage generated during the incubation process enter the return pipe through the return port and then enter the water treatment module;

[0023] Step 5: After the tail water enters the water treatment module, solid impurities are removed by the filtration unit, and the water storage unit is used for primary disinfection, water temperature adjustment and water quality monitoring. The biological treatment unit removes ammonia nitrogen and nitrite nitrogen, and the oxygenation unit is used for oxygenation and secondary disinfection. The treated tail water is then transported to the incubation module for recycling.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The water storage containers (including the incubation tank, water reservoir, bio-bag, U-shaped tube, etc.) in the incubation system provided by the present invention are all made of fiberglass machine-made panels with a thickness of 5-8 cm. The main bodies and brackets (fixed frames, multi-layer support frames, etc.) of the water treatment equipment (including the rotary drum microfiltration machine, air source heat pump, hydroxyl free radical generator, circulation pump, etc.) are made of stainless steel. The water supply pipelines are made of polyethylene, polyvinyl chloride, or polypropylene. These materials have the characteristics of light weight, high mechanical strength, corrosion resistance, good thermal insulation performance, smooth surface, non-toxicity and pollution-free, and resistance to aging and wear. During use, they are easy to install, easy to move, easy to maintain, and have a long service life.

[0026] 2. The incubation system provided by the present invention includes a water treatment module and an incubation module. The water treatment module consists of a filtration unit for removing solid impurities, a water storage unit for disinfection and regulating water temperature, a biological treatment unit for removing ammonia nitrogen and nitrite nitrogen, and an oxygenation unit for oxygenation and secondary disinfection. The filtration unit uses a rotary drum microfilter with a filtration accuracy of 48μm, a solid particle removal rate of more than 95%, high filtration efficiency and automatic backwash function; the water storage unit uses an air source heat pump for water temperature regulation, a hydroxyl free radical generator for primary disinfection, and real-time monitoring of water quality, which has the advantages of high efficiency and safety; the biological treatment unit adopts a fluidized bed structure, and the biological fillers in the biological reaction area are K3 and polyurethane fillers that can efficiently colonize nitrifying bacteria and denitrifying bacteria. Multiple disc-type microporous aerators are laid on one side of the porous partition biological reaction area. Under the push of the airflow, the biological fillers on the upper layer can fully roll and rotate, and nitrification and denitrification reactions are carried out efficiently; the oxygenation unit uses a multi-point oxygenation device composed of nano-oxygenation discs, which has high oxygenation efficiency, and adopts a UV disinfection device composed of 6 circumferential UV lamps with a sterilization rate of ≥95%; the hatching module consists of several hatching units for fish egg hatching. Each unit is interconnected by pipes, with a simple structure and easy assembly; the water treatment module operates efficiently and can simultaneously treat the tail water produced by 40 hatching units and provide sufficient circulating water for hatching; in addition, the hatching pool is square, and the biological bags and U-shaped tubes in the water treatment module fully utilize the above-ground and underground space vertically, occupying a small area, which is particularly suitable for factory farming.

[0027] 3. when using the hatching system and hatching method provided by the present invention to hatch fish eggs, circulating water enters the hatching unit from the water inlet pipe, is transported to the bottom of the hatching pool from the top of the hatching pool through the aqueduct and the water delivery pipe in sequence, the circulating water transported impacts the water surface from the water outlet on the outlet pipe at the bottom of the hatching pool in the form of a micro-water flow, so that the fish eggs are slowly rolled, and the embryonic development caused by the sinking and accumulation of fish eggs is avoided to be delayed, deformed, or even dead. In addition, the secretion of fish egg hatching enzyme can be stimulated, thereby stimulating the fish fry to remove the membrane; simultaneously, the circulating water with the suitable water temperature, dissolved oxygen, salinity, and pH value required for hatching is supplemented so that it is covered on the surface of the fish eggs, ensuring that the fish eggs are in a suitable hatching environment; the solid impurities and sewage produced by the hatching enter the return pipe through the return port, enter the water treatment module for disinfection and purification, and are recycled again.

[0028] 4. The hatching system provided by the present invention can hatch various types of fish eggs. According to the properties of the fish eggs, floating eggs and drifting eggs can be directly placed in the hatching pool for hatching, ordinary sinking eggs can be placed in a hanging frame for hatching, and sticky eggs can be placed in a hanging net for hatching. At the same time, the impact force of the micro-water flow on the fish eggs can be adjusted by adjusting the water inlet valve. A set of hatching system and hatching method can hatch various types of fish eggs, and has the characteristics of multi-purpose and high utilization rate.

[0029] 5. The entire incubation system is fully enclosed and self-circulating. The water used for incubation is adjusted to a suitable incubation temperature through an air source heat pump. The microbial community in the biological bag degrades the ammonia nitrogen and nitrite nitrogen in the circulating water, and the dissolved oxygen content is increased by a multi-point oxygenation device. After two disinfections by hydroxyl free radicals and ultraviolet rays, the water quality monitoring system monitors key indicators such as water temperature, dissolved oxygen, ammonia nitrogen concentration and nitrite concentration of the circulating water. In addition, the flow rate of the micro-water flow in the incubation pool is adjustable. All links of the incubation system are safe and controllable, avoiding the impact of drastic changes in the external climate and the invasion of pathogens such as water mold on the hatching of fish eggs. Compared with traditional incubation methods, the controllability and stability are significantly enhanced, which helps to improve the success rate of fish egg hatching.

[0030] 6. In the hatching system, only a circulating pump is required between the water storage unit and the biological treatment unit to transport the circulating water from the base of the biological bag to the top of the biological bag. The circulating water is transported by gravity potential energy in many other places. For example, the water flow in the hatching unit uses the gravity potential energy obtained by the circulating water from the top to the bottom of the hatching tank. The circulating water flows from the hatching unit through the filtration unit with the gravity potential energy obtained by the circulating water from the top to the bottom of the return pipe. The circulating water flows from the aeration unit to the hatching unit with the gravity potential energy obtained from the circulating water from the top to the bottom of the drain pipe 4. In addition, the water treatment equipment selected in the system, such as the rotary drum microfiltration machine and air source heat pump, have low energy consumption. Compared with traditional fish egg hatching methods, it can save more than 90% of water resources, which is green, energy-saving and water-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below with reference to the accompanying drawings and examples.

[0032] Figure 1 This is a schematic diagram of the overall structure of the incubation system provided by the present invention;

[0033] Figure 2 A perspective view of the overall structure of the incubation system provided by the present invention;

[0034] Figure 3 A perspective structural diagram of the incubation unit provided by the present invention;

[0035] Figure 4 A perspective structural diagram of the incubation unit (including the hanging frame) provided by the present invention;

[0036] Figure 5 A perspective structural diagram of the incubation unit (including the hanging net) provided by the present invention;

[0037] Figure 6 A perspective structural diagram of the multi-point oxygenation device provided by the present invention;

[0038] In the figure, 1. Incubation unit, 2. Filtration unit, 3. Water storage unit, 4. Biological treatment unit, 5. Oxygenation unit, 101. Incubation tank, 102. Fixing frame, 103. Support leg, 104. Water inlet pipe, 105. Water inlet valve, 106. Water guide pipe, 107. Water delivery pipe, 108. Water outlet pipe, 109. Water outlet hole, 110. Return hole, 111. Return pipe, 112. Return port, 113. Hanging frame, 114. Cable tie, 115. Horizontal fixing rope, 116. Hanging net, 201. Microfiltration machine housing, 202. Rotating drum, 203. Water inlet hole 1, 204. Drain hole, 205. Drain pipe, 206. Drain hole 1, 207. Drain pipe 1, 301. Water storage tank, 302. Air source heat pump, 303. Water quality monitoring Control device, 304. Hydroxyl free radical generator, 305. Water inlet 2, 306. Water supply hole, 307. Drain hole 2, 308. Water supply pipe, 309. Drain pipe 2, 310. Circulation pump, 401. Biological bag, 402. Porous partition, 403. Biological reaction zone, 404. Water storage zone, 405. Disc microporous aerator, 406. Biological filler, 407. Drain hole 3, 408. Drain pipe 3, 501. Left pipe, 502. Right pipe, 503. Connecting pipe, 504. Water inlet 3, 505. UV lamp, 506. Drain hole 4, 507. Drain pipe 4, 508. Multi-layer support frame, 509. Partition, 510. Nano-oxygenation disk, 511. Nano-oxygenation hole, 512. Oxygen supply pipe, 513. Oxygen tank. DETAILED DESCRIPTION

[0039] like Figure 1-6 As shown, a multi-purpose circulating water fish egg hatching system includes a hatching module and a water treatment module;

[0040] The incubation module includes a plurality of identical incubation units 1 , and the water treatment module includes a filtration unit 2 , a water storage unit 3 , a biological treatment unit 4 and an oxygenation unit 5 , and the units are interconnected through pipelines.

[0041] The incubation unit 1 includes an incubation area, a water inlet pipeline and a water return pipeline;

[0042] The incubation area includes an incubation pool 101, a fixing frame 102 and a support leg 103. The fixing frame 102 is provided on the inner wall of the incubation pool 101, and the support leg 103 is fixed to the bottom of the incubation pool 101.

[0043] The water inlet pipeline includes a water inlet pipe 104, a water inlet valve 105, a water guide pipe 106, a water delivery pipe 107, a water outlet pipe 108 and a water outlet hole 109. The water inlet pipe 104 is connected to the water guide pipe 106, the water delivery pipe 107 and the water outlet pipe 108 in sequence. The water inlet pipe 104 is arranged above the hatching pool 101 and is perpendicular to the upper edge of the hatching pool 101. The water inlet valve 105 is arranged on the water inlet pipe 104. The water guide pipe 106 is arranged on the side wall of the hatching pool 101. The water outlet pipe 108 is arranged in the center of the bottom surface of the hatching pool 101. Two rows of parallel water outlet holes 109 are provided on the side facing the water body. The water guide pipe 106 and the water outlet pipe 108 are connected through the water delivery pipe 107.

[0044] The return water pipeline includes a return water hole 110, a return water pipe 111 and a return water port 112. The return water hole 110 is provided on the bottom surface of the hatching pool 101. The return water pipe 111 passes through the return water hole 110 to connect the inside and outside of the hatching pool 101. The return water port 112 is an opening of the return water pipe 111 on the inner side of the hatching pool 101. The other end of the return water pipe 111 leads to the filter unit 2.

[0045] The filtration unit 2 is a rotary drum microfilter and connecting pipelines. The rotary drum microfilter includes a microfilter housing 201, a rotary drum 202 is provided in the microfilter housing 201, and the filter plate pore size of the rotary drum 202 is 48 μm. One end of the microfilter housing 201 is provided with a water inlet hole 1203 and a sewage hole 204, the water inlet hole 1203 is connected to the return pipe 111, and the sewage pipe 205 passes through the sewage hole 204 to the outside world. The other end of the microfilter housing 201 is provided with a drainage hole 1206, and the drainage pipe 1207 passes through the drainage hole 1206 to the water storage unit 3.

[0046] The water storage unit 3 includes a water reservoir 301, an air source heat pump 302, a water quality monitoring system 303, a hydroxyl free radical generator 304 and connecting pipelines. The water reservoir 301 is a circular conical bottom water tank with a water inlet 2305, a water delivery hole 306 and a drain hole 2307 on the side wall. The water inlet 2305 is connected to the drain pipe 1207, and the water delivery hole 306 is connected to the air source heat pump 302, the water quality monitoring system 303 and the hydroxyl free radical generator 304 through a water delivery pipe 308. The drain pipe 2309 is connected to the drain hole 2307 and the circulation pump 310 in sequence, leading to the biological treatment unit 4.

[0047] The biological treatment unit 4 comprises a biological bag 401 and connecting pipelines. A porous partition 402 is transversely disposed within the biological bag 401, dividing the interior of the biological bag 401 into a biological reaction zone 403 and a water storage zone 404. Multiple disc-type microporous aerators 405 are evenly laid on one side of the porous partition 402 in the biological reaction zone. A biological filler 406 is placed in the biological reaction zone 403. The biological filler 406 is K3 and polyurethane filler, and its side length is less than the pore diameter of the porous partition 402. A drainage hole 3407 is provided on the side wall of the water storage zone 404. A drainage pipe 3408 is connected to the drainage hole 3407 and leads to the oxygenation unit 5.

[0048] The oxygenation unit 5 includes a U-shaped tube consisting of a left tube 501, a right tube 502 and a connecting tube 503, a multi-point oxygenation device, an ultraviolet disinfection device and a connecting pipeline. The left tube 501 and the right tube 502 are both semi-buried in design, with the height of the above-ground part: the height of the underground part = 2:2.5, the diameter of the left tube 501: the diameter of the right tube 502 = 1:5, and a water inlet hole 3504 is provided on the upper tube wall of the right tube 502. The water inlet hole 3504 is connected to the drain pipe 3408. The multi-point oxygenation device is provided at the bottom of the right tube 502, and the ultraviolet disinfection device is provided in the middle of the left tube 501, including 6 ultraviolet lamps 505 arranged in a circumferential direction along the inner wall of the left tube 501. The upper tube wall of the left tube 501 is provided with a drainage hole 4506, and the drainage pipe 4 507 is connected to the drainage hole 4506 and leads to the water inlet pipe 104 of the incubation unit 1.

[0049] The multi-point oxygenation device includes a multi-layer support frame 508, which has a microporous mesh plate as an interlayer 509. A nano-oxygenation disk 510 is provided on each of the interlayers 509. The nano-oxygenation disk 510 is provided with evenly distributed nano-oxygenation holes 511. The nano-oxygenation disk 510 is connected to an oxygen tank 513 through an oxygen supply tube 512.

[0050] The incubation unit can be used with a hanging frame 113 or a hanging net 116. The hanging frame 113 and the hanging net 116 are fixed to the fixing frame 102 by a cable tie 114. A horizontal fixing rope 115 with both ends connected to the fixing frame 102 is provided above the hanging frame 113 and the hanging net 116.

[0051] The hatching pool 101, the supporting legs 103, the water reservoir 301, the biological bag 401, the left tube 501, the right tube 502, and the connecting tube 503 are made of fiberglass; the fixing frame 102, the horizontal fixing rope 115, the microfiltration machine housing 201, the rotating drum 202, the circulating pump 310, the multi-layer supporting frame 508, and the partition 509 are made of stainless steel; the water inlet pipe 104, the water inlet valve 105, the water guide pipe 106, the water supply pipe 107, the water outlet pipe 108, the return pipe 111, the hanging frame 113, the cable tie 114, the hanging net 116, the sewage pipe 205, the drain pipe 1 207, the drain pipe 2 309, the drain pipe 3 408, and the drain pipe 4 507 are made of polyethylene, polyvinyl chloride, or polypropylene.

[0052] A multi-purpose circulating water fish egg hatching method, the hatching steps are as follows:

[0053] Step 1: According to the properties of the fish eggs, floating eggs and drifting eggs are directly placed in the hatching pool 101 for hatching, ordinary sinking eggs are placed in the hanging frame 113 for hatching, and sticky eggs are placed on the hanging net 116 for hatching;

[0054] Step 2: Circulating water enters the hatching unit from the water inlet pipe 104 and is transported to the bottom of the hatching tank 101 through the water guide pipe 106. The transported circulating water impacts the water surface from the water outlet 109 in the form of a micro-flow, stimulating the hatching of fish eggs in the hatching tank 101. The flow rate of the micro-flow can be adjusted by the water inlet valve 105.

[0055] Step 3: replenishing circulating water with appropriate water temperature, dissolved oxygen, ammonia nitrogen content, and nitrite content into the hatching pool 101 through a micro-flow, so that the circulating water covers the surface of the fish eggs and ensures that the fish eggs are in a suitable hatching environment;

[0056] Step 4: Driven by the micro-water flow, a large amount of solid impurities and sewage generated during the incubation process enter the return pipe 111 through the return water port 112 and enter the water treatment module;

[0057] Step 5: After the tail water enters the water treatment module, solid impurities are removed by the filtration unit 2, and the water storage unit 3 is used for primary disinfection, water temperature adjustment and water quality monitoring. The biological treatment unit 4 removes ammonia nitrogen and nitrite nitrogen, and the oxygenation unit 5 is used for oxygenation and secondary disinfection. The treated tail water is then transported to the incubation module for recycling.

[0058] [Example 1]

[0059] like Figure 1 、 2As shown in , 3, and 6, a multi-purpose circulating water fish egg hatching system is designed and manufactured for hatching floating eggs and drifting eggs, including a hatching module and a water treatment module;

[0060] The incubation module includes a plurality of identical incubation units 1 , and the water treatment module includes a filtration unit 2 , a water storage unit 3 , a biological treatment unit 4 and an oxygenation unit 5 , and the units are interconnected through pipelines.

[0061] The incubation unit 1 includes an incubation area, a water inlet pipeline and a water return pipeline;

[0062] The incubation area includes an incubation pool 101, a fixing frame 102 and a support leg 103. The fixing frame 102 is provided on the inner wall of the incubation pool 101, and the support leg 103 is fixed to the bottom of the incubation pool 101.

[0063] The water inlet pipeline includes a water inlet pipe 104, a water inlet valve 105, a water guide pipe 106, a water delivery pipe 107, a water outlet pipe 108 and a water outlet hole 109. The water inlet pipe 104 is connected to the water guide pipe 106, the water delivery pipe 107 and the water outlet pipe 108 in sequence. The water inlet pipe 104 is arranged above the hatching pool 101 and is perpendicular to the upper edge of the hatching pool 101. The water inlet valve 105 is arranged on the water inlet pipe 104. The water guide pipe 106 is arranged on the side wall of the hatching pool 101. The water outlet pipe 108 is arranged in the center of the bottom surface of the hatching pool 101. Two rows of parallel water outlet holes 109 are provided on the side facing the water body. The water guide pipe 106 and the water outlet pipe 108 are connected through the water delivery pipe 107.

[0064] The return water pipeline includes a return water hole 110, a return water pipe 111 and a return water port 112. The return water hole 110 is provided on the bottom surface of the hatching pool 101. The return water pipe 111 passes through the return water hole 110 to connect the inside and outside of the hatching pool 101. The return water port 112 is an opening of the return water pipe 111 on the inner side of the hatching pool 101. The other end of the return water pipe 111 leads to the filter unit 2.

[0065] The filtration unit 2 is a rotary drum microfilter and connecting pipelines. The rotary drum microfilter includes a microfilter housing 201, a rotary drum 202 is provided in the microfilter housing 201, and the filter plate pore size of the rotary drum 202 is 48 μm. One end of the microfilter housing 201 is provided with a water inlet hole 1203 and a sewage hole 204, the water inlet hole 1203 is connected to the return pipe 111, and the sewage pipe 205 passes through the sewage hole 204 to the outside world. The other end of the microfilter housing 201 is provided with a drainage hole 1206, and the drainage pipe 1207 passes through the drainage hole 1206 to the water storage unit 3.

[0066] The water storage unit 3 includes a water reservoir 301, an air source heat pump 302, a water quality monitoring system 303, a hydroxyl free radical generator 304 and connecting pipelines. The water reservoir 301 is a circular conical bottom water tank with a water inlet 2305, a water delivery hole 306 and a drain hole 2307 on the side wall. The water inlet 2305 is connected to the drain pipe 1207, and the water delivery hole 306 is connected to the air source heat pump 302, the water quality monitoring system 303 and the hydroxyl free radical generator 304 through a water delivery pipe 308. The drain pipe 2309 is connected to the drain hole 2307 and the circulation pump 310 in sequence, leading to the biological treatment unit 4.

[0067] The biological treatment unit 4 comprises a biological bag 401 and connecting pipelines. A porous partition 402 with a pore size of 5 cm is transversely disposed within the biological bag 401, dividing the interior of the biological bag 401 into a biological reaction zone 403 and a water storage zone 404. Multiple disc-type microporous aerators 405 are evenly laid on one side of the porous partition 402 in the biological reaction zone. A biological filler 406 is placed in the biological reaction zone 403. The biological filler 406 is a 1:1 mixture of K3 and polyurethane filler with a side length of 10 cm. A drainage hole 3407 is provided on the side wall of the water storage zone 404. A drainage pipe 3408 is connected to the drainage hole 3407 and leads to the oxygenation unit 5.

[0068] The oxygenation unit 5 includes a U-shaped tube consisting of a left tube 501, a right tube 502 and a connecting tube 503, a multi-point oxygenation device, an ultraviolet disinfection device and a connecting pipeline. The left tube 501 and the right tube 502 are both semi-buried in design, with the above-ground part being 2m high and the underground part being 2.5m high. The left tube 501 has a diameter of 30cm, and the right tube 502 has a diameter of 150cm. A water inlet hole 3504 is provided on the upper tube wall of the right tube 502, and the water inlet hole 3504 is connected to the drain pipe 3408. The multi-point oxygenation device is provided at the bottom of the right tube 502, and the ultraviolet disinfection device is provided in the middle of the left tube 501, including 6 ultraviolet lamps 505 arranged in a circumferential direction along the inner wall of the left tube 501. A drainage hole 4506 is provided on the upper tube wall of the left tube 501, and a drainage pipe 4507 is connected to the drainage hole 4508. 506 is connected to the water inlet pipe 104 of the hatching unit 1.

[0069] The multi-point oxygenation device includes a multi-layer support frame 508, which has a microporous mesh plate as an interlayer 509. A nano-oxygenation disk 510 is provided on each of the interlayers 509. The nano-oxygenation disk 510 is provided with evenly distributed nano-oxygenation holes 511. The nano-oxygenation disk 510 is connected to an oxygen tank 513 through an oxygen supply tube 512.

[0070] The hatching pool 101, the supporting legs 103, the water reservoir 301, the biological bag 401, the left pipe 501, the right pipe 502, and the connecting pipe 503 are made of fiberglass; the fixing frame 102, the microfiltration machine housing 201, the rotating drum 202, the circulating pump 310, the multi-layer supporting frame 508, and the interlayer 509 are made of stainless steel; the water inlet pipe 104, the water inlet valve 105, the water guide pipe 106, the water supply pipe 107, the water outlet pipe 108, the return pipe 111, the sewage pipe 205, the drain pipe 1 207, the drain pipe 2 309, the drain pipe 3 408, and the drain pipe 4 507 are made of polyethylene.

[0071] A multi-purpose circulating water fish egg hatching method is used for hatching floating eggs and drifting eggs, and the hatching steps are as follows:

[0072] Step 1: placing the fish eggs directly in the hatching pond 101 for hatching;

[0073] Step 2: Circulating water enters the hatching unit from the water inlet pipe 104 and is transported to the bottom of the hatching tank 101 through the water guide pipe 106. The transported circulating water impacts the water surface from the water outlet 109 in the form of a micro-flow. The flow rate of the micro-flow is adjusted by the water inlet valve 105, so that the fish eggs in the hatching tank 101 slowly rotate and roll along with the water flow, thereby preventing the fish eggs from clumping and being damaged, and effectively stimulating the hatching of the fish eggs.

[0074] Step 3: replenishing circulating water with appropriate water temperature, dissolved oxygen, ammonia nitrogen content, and nitrite content into the hatching pool 101 through a micro-flow, so that the circulating water covers the surface of the fish eggs and ensures that the fish eggs are in a suitable hatching environment;

[0075] Step 4: Driven by the micro-water flow, a large amount of solid impurities and sewage generated during the incubation process enter the return pipe 111 through the return water port 112 and enter the water treatment module;

[0076] Step 5: After entering the water treatment module, the tailwater passes through the filtration unit 2 to remove solid impurities. The water storage unit 3 undergoes primary disinfection, temperature adjustment, and water quality monitoring. The biological treatment unit 4 removes ammonia and nitrite nitrogen. The oxygenation unit 5 provides oxygenation and secondary disinfection. The treated tailwater is then transported to the incubation module for recycling. The fully enclosed incubation system prevents the intrusion of exogenous pathogens. Incubation occurs in clean, flowing water with ample dissolved oxygen, effectively reducing the risk of diseases like water mold.

[0077] [Example 2]

[0078] like Figure 1 、 2As shown in , 4, and 6, this embodiment is an improvement on the embodiment 1. Specifically, a multi-purpose circulating water fish egg hatching system is designed and manufactured for hatching ordinary sinking eggs, including a hatching module and a water treatment module;

[0079] The incubation module includes a plurality of identical incubation units 1 , and the water treatment module includes a filtration unit 2 , a water storage unit 3 , a biological treatment unit 4 and an oxygenation unit 5 , and the units are interconnected through pipelines.

[0080] The incubation unit 1 includes an incubation area, a water inlet pipeline and a water return pipeline;

[0081] The incubation area includes an incubation pool 101, a fixing frame 102, support legs 103, and a hanging frame 113. The fixing frame 102 is provided on the inner wall of the incubation pool 101, the support legs 103 are fixed to the bottom of the incubation pool 101, and the hanging frame 113 is fixed to the fixing frame 102 by a cable tie 114. A transverse fixing rope 115 connected to the fixing frame 102 at both ends is provided above the hanging frame 113.

[0082] The water inlet pipeline includes a water inlet pipe 104, a water inlet valve 105, a water guide pipe 106, a water delivery pipe 107, a water outlet pipe 108 and a water outlet hole 109. The water inlet pipe 104 is connected to the water guide pipe 106, the water delivery pipe 107 and the water outlet pipe 108 in sequence. The water inlet pipe 104 is arranged above the hatching pool 101 and is perpendicular to the upper edge of the hatching pool 101. The water inlet valve 105 is arranged on the water inlet pipe 104. The water guide pipe 106 is arranged on the side wall of the hatching pool 101. The water outlet pipe 108 is arranged in the center of the bottom surface of the hatching pool 101. Two rows of parallel water outlet holes 109 are provided on the side facing the water body. The water guide pipe 106 and the water outlet pipe 108 are connected through the water delivery pipe 107.

[0083] The return water pipeline includes a return water hole 110, a return water pipe 111 and a return water port 112. The return water hole 110 is provided on the bottom surface of the hatching pool 101. The return water pipe 111 passes through the return water hole 110 to connect the inside and outside of the hatching pool 101. The return water port 112 is an opening of the return water pipe 111 on the inner side of the hatching pool 101. The other end of the return water pipe 111 leads to the filter unit 2.

[0084] The filtration unit 2 is a rotary drum microfilter and connecting pipelines. The rotary drum microfilter includes a microfilter housing 201, a rotary drum 202 is provided in the microfilter housing 201, and the filter plate pore size of the rotary drum 202 is 48 μm. One end of the microfilter housing 201 is provided with a water inlet hole 1203 and a sewage hole 204, the water inlet hole 1203 is connected to the return pipe 111, and the sewage pipe 205 passes through the sewage hole 204 to the outside world. The other end of the microfilter housing 201 is provided with a drainage hole 1206, and the drainage pipe 1207 passes through the drainage hole 1206 to the water storage unit 3.

[0085] The water storage unit 3 includes a water reservoir 301, an air source heat pump 302, a water quality monitoring system 303, a hydroxyl free radical generator 304 and connecting pipelines. The water reservoir 301 is a circular conical bottom water tank with a water inlet 2305, a water delivery hole 306 and a drain hole 2307 on the side wall. The water inlet 2305 is connected to the drain pipe 1207, and the water delivery hole 306 is connected to the air source heat pump 302, the water quality monitoring system 303 and the hydroxyl free radical generator 304 through a water delivery pipe 308. The drain pipe 2309 is connected to the drain hole 2307 and the circulation pump 310 in sequence, leading to the biological treatment unit 4.

[0086] The biological treatment unit 4 comprises a biological bag 401 and connecting pipelines. A porous partition 402 with a pore size of 5 cm is transversely disposed within the biological bag 401, dividing the interior of the biological bag 401 into a biological reaction zone 403 and a water storage zone 404. Multiple disc-type microporous aerators 405 are evenly laid on one side of the porous partition 402 in the biological reaction zone. A biological filler 406 is placed in the biological reaction zone 403. The biological filler 406 is a 1:1 mixture of K3 and polyurethane filler with a side length of 10 cm. A drainage hole 3407 is provided on the side wall of the water storage zone 404. A drainage pipe 3408 is connected to the drainage hole 3407 and leads to the oxygenation unit 5.

[0087] The oxygenation unit 5 includes a U-shaped tube consisting of a left tube 501, a right tube 502 and a connecting tube 503, a multi-point oxygenation device, an ultraviolet disinfection device and a connecting pipeline. The left tube 501 and the right tube 502 are both semi-buried in design, with the above-ground part being 2m high and the underground part being 2.5m high. The left tube 501 has a diameter of 30cm, and the right tube 502 has a diameter of 150cm. A water inlet hole 3504 is provided on the upper tube wall of the right tube 502, and the water inlet hole 3504 is connected to the drain pipe 3408. The multi-point oxygenation device is provided at the bottom of the right tube 502, and the ultraviolet disinfection device is provided in the middle of the left tube 501, including 6 ultraviolet lamps 505 arranged in a circumferential direction along the inner wall of the left tube 501. A drainage hole 4506 is provided on the upper tube wall of the left tube 501, and a drainage pipe 4507 is connected to the drainage hole 4508. 506 is connected to the water inlet pipe 104 of the hatching unit 1.

[0088] The multi-point oxygenation device includes a multi-layer support frame 508, which has a microporous mesh plate as an interlayer 509. A nano-oxygenation disk 510 is provided on each of the interlayers 509. The nano-oxygenation disk 510 is provided with evenly distributed nano-oxygenation holes 511. The nano-oxygenation disk 510 is connected to an oxygen tank 513 through an oxygen supply tube 512.

[0089] The hatching pool 101, the supporting legs 103, the water reservoir 301, the biological bag 401, the left tube 501, the right tube 502, and the connecting tube 503 are made of fiberglass; the fixing frame 102, the horizontal fixing rope 115, the microfiltration machine housing 201, the rotating drum 202, the circulating pump 310, the multi-layer supporting frame 508, and the partition 509 are made of stainless steel; the water inlet pipe 104, the water inlet valve 105, the water guide pipe 106, the water supply pipe 107, the water outlet pipe 108, the return pipe 111, the hanging frame 113, the cable tie 114, the sewage pipe 205, the drain pipe 1 207, the drain pipe 2 309, the drain pipe 3 408, and the drain pipe 4 507 are made of polyethylene.

[0090] A multi-purpose circulating water fish egg hatching method is used for hatching common sinking eggs, and the hatching steps are as follows:

[0091] Step 1: Place the fish eggs directly in the hanging frame 113 for hatching;

[0092] Step 2: Circulating water enters the hatching unit from the water inlet pipe 104 and is transported to the bottom of the hatching pool 101 through the water guide pipe 106. The transported circulating water impacts the water surface from the water outlet 109 in the form of a micro-flow. The flow rate of the micro-flow is adjusted by the water inlet valve 105, so that the fish eggs in the hanging frame 113 slowly rotate and roll along with the water flow, thereby preventing the fish eggs from clumping and being damaged, and effectively stimulating the hatching of the fish eggs.

[0093] Step 3: replenishing circulating water with appropriate water temperature, dissolved oxygen, ammonia nitrogen content, and nitrite content into the hatching pool 101 through a micro-flow, so that the circulating water covers the surface of the fish eggs and ensures that the fish eggs are in a suitable hatching environment;

[0094] Step 4: Driven by the micro-water flow, a large amount of solid impurities and sewage generated during the incubation process enter the return pipe 111 through the return water port 112 and enter the water treatment module;

[0095] Step 5: After entering the water treatment module, the tailwater passes through the filtration unit 2 to remove solid impurities. The water storage unit 3 undergoes primary disinfection, temperature adjustment, and water quality monitoring. The biological treatment unit 4 removes ammonia and nitrite nitrogen. The oxygenation unit 5 provides oxygenation and secondary disinfection. The treated tailwater is then transported to the incubation module for recycling. The fully enclosed incubation system prevents the intrusion of exogenous pathogens. Incubation occurs in clean, flowing water with ample dissolved oxygen, effectively reducing the risk of diseases like water mold.

[0096] [Example 3]

[0097] like Figure 1 、 2 As shown in , 5, and 6, this embodiment is an improvement on the embodiment 1. Specifically, a multi-purpose circulating water fish egg hatching system is designed and manufactured for hatching sticky eggs, including a hatching module and a water treatment module;

[0098] The incubation module includes a plurality of identical incubation units 1 , and the water treatment module includes a filtration unit 2 , a water storage unit 3 , a biological treatment unit 4 and an oxygenation unit 5 , and the units are interconnected through pipelines.

[0099] The incubation unit 1 includes an incubation area, a water inlet pipeline and a water return pipeline;

[0100] The incubation area includes an incubation pool 101, a fixing frame 102, support legs 103, and a hanging net 116. The fixing frame 102 is provided on the inner wall of the incubation pool 101, the support legs 103 are fixed to the bottom of the incubation pool 101, and the hanging net 116 is fixed to the fixing frame 102 by a cable tie 114. A transverse fixing rope 115 connected to the fixing frame 102 at both ends is provided above the hanging net 116.

[0101] The water inlet pipeline includes a water inlet pipe 104, a water inlet valve 105, a water guide pipe 106, a water delivery pipe 107, a water outlet pipe 108 and a water outlet hole 109. The water inlet pipe 104 is connected to the water guide pipe 106, the water delivery pipe 107 and the water outlet pipe 108 in sequence. The water inlet pipe 104 is arranged above the hatching pool 101 and is perpendicular to the upper edge of the hatching pool 101. The water inlet valve 105 is arranged on the water inlet pipe 104. The water guide pipe 106 is arranged on the side wall of the hatching pool 101. The water outlet pipe 108 is arranged in the center of the bottom surface of the hatching pool 101. Two rows of parallel water outlet holes 109 are provided on the side facing the water body. The water guide pipe 106 and the water outlet pipe 108 are connected through the water delivery pipe 107.

[0102] The return water pipeline includes a return water hole 110, a return water pipe 111 and a return water port 112. The return water hole 110 is provided on the bottom surface of the hatching pool 101. The return water pipe 111 passes through the return water hole 110 to connect the inside and outside of the hatching pool 101. The return water port 112 is an opening of the return water pipe 111 on the inner side of the hatching pool 101. The other end of the return water pipe 111 leads to the filter unit 2.

[0103] The filtration unit 2 is a rotary drum microfilter and connecting pipelines. The rotary drum microfilter includes a microfilter housing 201, a rotary drum 202 is provided in the microfilter housing 201, and the filter plate pore size of the rotary drum 202 is 48 μm. One end of the microfilter housing 201 is provided with a water inlet hole 1203 and a sewage hole 204, the water inlet hole 1203 is connected to the return pipe 111, and the sewage pipe 205 passes through the sewage hole 204 to the outside world. The other end of the microfilter housing 201 is provided with a drainage hole 1206, and the drainage pipe 1207 passes through the drainage hole 1206 to the water storage unit 3.

[0104] The water storage unit 3 includes a water reservoir 301, an air source heat pump 302, a water quality monitoring system 303, a hydroxyl free radical generator 304 and connecting pipelines. The water reservoir 301 is a circular conical bottom water tank with a water inlet 2305, a water delivery hole 306 and a drain hole 2307 on the side wall. The water inlet 2305 is connected to the drain pipe 1207, and the water delivery hole 306 is connected to the air source heat pump 302, the water quality monitoring system 303 and the hydroxyl free radical generator 304 through a water delivery pipe 308. The drain pipe 2309 is connected to the drain hole 2307 and the circulation pump 310 in sequence, leading to the biological treatment unit 4.

[0105] The biological treatment unit 4 comprises a biological bag 401 and connecting pipelines. A porous partition 402 with a pore size of 5 cm is transversely disposed within the biological bag 401, dividing the interior of the biological bag 401 into a biological reaction zone 403 and a water storage zone 404. Multiple disc-type microporous aerators 405 are evenly laid on one side of the porous partition 402 in the biological reaction zone. A biological filler 406 is placed in the biological reaction zone 403. The biological filler 406 is a 1:1 mixture of K3 and polyurethane filler with a side length of 10 cm. A drainage hole 3407 is provided on the side wall of the water storage zone 404. A drainage pipe 3408 is connected to the drainage hole 3407 and leads to the oxygenation unit 5.

[0106] The oxygenation unit 5 includes a U-shaped tube consisting of a left tube 501, a right tube 502 and a connecting tube 503, a multi-point oxygenation device, an ultraviolet disinfection device and a connecting pipeline. The left tube 501 and the right tube 502 are both semi-buried in design, with the above-ground part being 2m high and the underground part being 2.5m high. The left tube 501 has a diameter of 30cm, and the right tube 502 has a diameter of 150cm. A water inlet hole 3504 is provided on the upper tube wall of the right tube 502, and the water inlet hole 3504 is connected to the drain pipe 3408. The multi-point oxygenation device is provided at the bottom of the right tube 502, and the ultraviolet disinfection device is provided in the middle of the left tube 501, including 6 ultraviolet lamps 505 arranged in a circumferential direction along the inner wall of the left tube 501. A drainage hole 4506 is provided on the upper tube wall of the left tube 501, and a drainage pipe 4507 is connected to the drainage hole 4508. 506 is connected to the water inlet pipe 104 of the hatching unit 1.

[0107] The multi-point oxygenation device includes a multi-layer support frame 508, which has a microporous mesh plate as an interlayer 509. A nano-oxygenation disk 510 is provided on each of the interlayers 509. The nano-oxygenation disk 510 is provided with evenly distributed nano-oxygenation holes 511. The nano-oxygenation disk 510 is connected to an oxygen tank 513 through an oxygen supply tube 512.

[0108] The hatching pool 101, the supporting legs 103, the water reservoir 301, the biological bag 401, the left tube 501, the right tube 502, and the connecting tube 503 are made of fiberglass; the fixing frame 102, the horizontal fixing rope 115, the microfiltration machine housing 201, the rotating drum 202, the circulating pump 310, the multi-layer supporting frame 508, and the partition 509 are made of stainless steel; the water inlet pipe 104, the water inlet valve 105, the water guide pipe 106, the water supply pipe 107, the water outlet pipe 108, the return pipe 111, the hanging net 116, the cable tie 114, the sewage pipe 205, the drain pipe 1 207, the drain pipe 2 309, the drain pipe 3 408, and the drain pipe 4 507 are made of polyethylene.

[0109] A multi-purpose circulating water fish egg hatching method is used for hatching sticky eggs, and the hatching steps are as follows:

[0110] Step 1: placing the fish eggs directly on the hanging net 116 for hatching;

[0111] Step 2: Circulating water enters the hatching unit from the water inlet pipe 104 and is transported to the bottom of the hatching pool 101 through the water guide pipe 106. The transported circulating water impacts the water surface from the water outlet 109 in the form of a micro-flow. The flow rate of the micro-flow is adjusted by the water inlet valve 105, so that the fish eggs on the hanging net 116 slowly roll along the water flow, effectively stimulating the hatching of the fish eggs.

[0112] Step 3: replenishing circulating water with appropriate water temperature, dissolved oxygen, ammonia nitrogen content, and nitrite content into the hatching pool 101 through a micro-flow, so that the circulating water covers the surface of the fish eggs and ensures that the fish eggs are in a suitable hatching environment;

[0113] Step 4: Driven by the micro-water flow, a large amount of solid impurities and sewage generated during the incubation process enter the return pipe 111 through the return water port 112 and enter the water treatment module;

[0114] Step 5: After entering the water treatment module, the tailwater passes through the filtration unit 2 to remove solid impurities. The water storage unit 3 undergoes primary disinfection, temperature adjustment, and water quality monitoring. The biological treatment unit 4 removes ammonia and nitrite nitrogen. The oxygenation unit 5 provides oxygenation and secondary disinfection. The treated tailwater is then transported to the incubation module for recycling. The fully enclosed incubation system prevents the intrusion of exogenous pathogens. Incubation occurs in clean, flowing water with ample dissolved oxygen, effectively reducing the risk of diseases like water mold.

[0115] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A multi-purpose circulating water fish egg incubation device, characterized by: Including hatching module and water treatment module; The incubation module comprises a plurality of identical incubation units (1); the water treatment module comprises a filtration unit (2), a water storage unit (3), a biological treatment unit (4) and an oxygenation unit (5); and the units are interconnected via pipelines.

2. A multi-purpose circulating water fish egg incubation device, characterized by: The incubation unit (1) comprises an incubation area, a water inlet pipeline and a water return pipeline; The incubation area comprises an incubation pool (101), a fixing frame (102) and supporting legs (103), wherein the fixing frame (102) is arranged on the inner wall of the incubation pool (101), and the supporting legs (103) are fixed to the bottom of the incubation pool (101); The water inlet pipeline comprises a water inlet pipe (104), a water inlet valve (105), a water guide pipe (106), a water delivery pipe (107), a water outlet pipe (108) and a water outlet hole (109). The water inlet pipe (104) is sequentially connected to the water guide pipe (106), the water delivery pipe (107) and the water outlet pipe (108). The water inlet pipe (104) is arranged above the hatching pool (101) and is connected to the hatching pool (101). ) is vertical along the upper edge, the water inlet valve (105) is provided on the water inlet pipe (104), the water guide pipe (106) is provided on the side wall of the hatching pool (101), the water outlet pipe (108) is provided at the center of the bottom surface of the hatching pool (101), and two rows of parallel water outlet holes (109) are provided on the side facing the water body, and the water guide pipe (106) and the water outlet pipe (108) are connected through the water delivery pipe (107); The return water pipeline comprises a return water hole (110), a return water pipe (111) and a return water outlet (112); the return water hole (110) is provided on the bottom surface of the hatching pool (101); the return water pipe (111) passes through the return water hole (110) to connect the inside and outside of the hatching pool (101); the return water outlet (112) is an opening of the return water pipe (111) on the inner side of the hatching pool (101); the other end of the return water pipe (111) leads to the filter unit (2).

3. A multi-purpose circulating water fish egg incubation device, characterized by: The filtering unit (2) is a rotary drum microfilter and a connecting pipeline. The rotary drum microfilter comprises a microfilter housing (201). A rotary drum (202) is provided inside the microfilter housing (201). The filter plate of the rotary drum (202) has a pore size of 48 μm. A water inlet hole 1 (203) and a sewage discharge hole (204) are provided at one end of the microfilter housing (201). The water inlet hole 1 (203) is connected to the return pipe (111). The sewage discharge pipe (205) passes through the sewage discharge hole (204) and leads to the outside. A drainage hole 1 (206) is provided at the other end of the microfilter housing (201). A drainage pipe 1 (207) passes through the drainage hole 1 (206) and leads to the water storage unit (3).

4. A multi-purpose circulating water fish egg incubation device, characterized by: The water storage unit (3) includes a water reservoir (301), an air source heat pump (302), a water quality monitoring system (303), a hydroxyl radical generator (304) and connecting pipes. The water reservoir (301) is a circular conical bottom water tank with a water inlet hole 2 (305), a water delivery hole (306) and a drain hole 2 (307) provided on the side wall. The water inlet hole 2 (305) is connected to the drain pipe 1 (207). The water delivery hole (306) is connected to the air source heat pump (302), the water quality monitoring system (303) and the hydroxyl radical generator (304) through a water delivery pipe (308). The drain pipe 2 (309) is connected to the drain hole 2 (307) and the circulation pump (310) in sequence and leads to the biological treatment unit (4).

5. A multi-purpose circulating water fish egg incubation device, characterized by: The biological treatment unit (4) is a biological bag (401) and a connecting pipeline. A porous partition (402) is horizontally arranged inside the biological bag (401), dividing the inside of the biological bag (401) into a biological reaction area (403) and a water storage area (404). A plurality of disc-type microporous aerators (405) are evenly laid on one side of the biological reaction area of ​​the porous partition (402). A biological filler (406) is placed in the biological reaction area (403). The biological filler (406) is selected from K3 and polyurethane filler, and the side length is less than the pore diameter of the porous partition (402). A drainage hole 3 (407) is provided on the side wall of the water storage area (404). A drainage pipe 3 (408) is connected to the drainage hole 3 (407) and leads to the oxygenation unit (5).

6. A multi-purpose circulating water fish egg incubation device, characterized by: The oxygenation unit (5) comprises a U-shaped tube consisting of a left tube (501), a right tube (502) and a connecting tube (503), a multi-point oxygenation device, an ultraviolet disinfection device and a connecting pipeline. The left tube (501) and the right tube (502) are both semi-buried in design, with the height of the above-ground part: the height of the underground part = 2:2.5, the diameter of the left tube (501): the diameter of the right tube (502) = 1:5, and a water inlet hole 3 (504) is provided on the upper wall of the right tube (502). Hole 3 (504) is connected to the drain pipe 3 (408), the multi-point oxygenation device is arranged at the bottom of the right pipe (502), the ultraviolet disinfection device is arranged in the middle of the left pipe (501), including 6 ultraviolet lamps (505) arranged in a circumferential direction along the inner wall of the left pipe (501), and a drain hole 4 (506) is provided on the upper wall of the left pipe (501), and a drain pipe 4 (507) is connected to the drain hole 4 (506) and leads to the water inlet pipe (104) of the incubation unit (1).

7. A multi-purpose circulating water fish egg incubation device, characterized by: The multi-point oxygenation device comprises a multi-layer support frame (508), wherein the multi-layer support frame (508) has a microporous mesh plate as an interlayer (509), and a nano-oxygenation disk (510) is provided on each of the interlayers (509). The nano-oxygenation disk (510) is provided with uniformly distributed nano-oxygenation holes (511), and the nano-oxygenation disk (510) is connected to an oxygen tank (513) via an oxygen supply tube (512).

8. A multi-purpose circulating water fish egg incubation device, characterized by: The incubation unit can be used in conjunction with a hanging frame (113) or a hanging net (116); the hanging frame (113) and the hanging net (116) are fixed to the fixing frame (102) via a tie (114); and a transverse fixing rope (115) connected to the fixing frame (102) at both ends is arranged above the hanging frame (113) and the hanging net (116).

9. A multi-purpose circulating water fish egg incubation device, characterized by: The hatching pool (101), the supporting legs (103), the water reservoir (301), the biological bag (401), the left tube (501), the right tube (502), and the connecting tube (503) are made of glass fiber reinforced plastics; the fixing frame (102), the transverse fixing rope (115), the microfiltration machine housing (201), the rotating drum (202), the circulating pump (310), the multi-layer supporting frame (508), and the partition (509) are made of stainless steel. The water inlet pipe (104), the water inlet valve (105), the water guide pipe (106), the water delivery pipe (107), the water outlet pipe (108), the return pipe (111), the hanging frame (113), the tie (114), the hanging net (116), the sewage pipe (205), the drain pipe 1 (207), the drain pipe 2 (309), the drain pipe 3 (408), and the drain pipe 4 (507) are made of polyethylene, polyvinyl chloride, or polypropylene.

10. A multi-purpose circulating water fish egg hatching method according to any one of claims 1 to 9, characterized in that: The incubation steps are as follows: Step 1: According to the properties of the fish eggs, the floating eggs and the drifting eggs are directly placed in the hatching pond (101) for hatching, the ordinary sinking eggs are placed in the hanging frame (113) for hatching, and the sticky eggs are placed in the hanging net (116) for hatching; Step 2: Circulating water enters the hatching unit from the water inlet pipe (104) and is transported to the bottom of the hatching pool (101) through the water guide pipe (106). The transported circulating water impacts the water surface from the water outlet (109) in the form of a micro-flow, thereby stimulating the hatching of fish eggs in the hatching pool (101). The flow rate of the micro-flow can be adjusted by the water inlet valve (105); Step 3: replenishing circulating water with appropriate water temperature, dissolved oxygen, ammonia nitrogen content, and nitrite content into the hatching pool (101) through a micro-flow of water, so that the circulating water covers the surface of the fish eggs, ensuring that the fish eggs are in a suitable hatching environment; Step 4: Driven by the micro-water flow, a large amount of solid impurities and sewage generated during the incubation process enter the return pipe (111) through the return port (112) and enter the water treatment module; Step 5: After the tail water enters the water treatment module, solid impurities are removed by the filtration unit (2), the water storage unit (3) is used for primary disinfection, water temperature adjustment and water quality monitoring, the biological treatment unit (4) is used to remove ammonia nitrogen and nitrite nitrogen, the oxygenation unit (5) is used for oxygenation and secondary disinfection, and the treated tail water is then transported to the incubation module for recycling.

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