CN111792797A - Circulating water high-density fish culture device and method thereof - Google Patents
Circulating water high-density fish culture device and method thereof Download PDFInfo
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- CN111792797A CN111792797A CN202010786535.1A CN202010786535A CN111792797A CN 111792797 A CN111792797 A CN 111792797A CN 202010786535 A CN202010786535 A CN 202010786535A CN 111792797 A CN111792797 A CN 111792797A
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 77
- 239000001301 oxygen Substances 0.000 claims abstract description 77
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 77
- 239000010865 sewage Substances 0.000 claims abstract description 60
- 238000009360 aquaculture Methods 0.000 claims abstract description 29
- 244000144974 aquaculture Species 0.000 claims abstract description 29
- 238000000746 purification Methods 0.000 claims abstract description 20
- 238000006213 oxygenation reaction Methods 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims description 14
- 238000009372 pisciculture Methods 0.000 claims description 13
- 241000894006 Bacteria Species 0.000 claims description 6
- 229920000742 Cotton Polymers 0.000 claims description 6
- 210000005056 cell body Anatomy 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims 1
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- 238000005859 coupling reaction Methods 0.000 claims 1
- 239000013505 freshwater Substances 0.000 abstract description 5
- 239000013535 sea water Substances 0.000 abstract description 3
- 238000012136 culture method Methods 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 3
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/003—Aquaria; Terraria
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
- A01K63/042—Introducing gases into the water, e.g. aerators, air pumps
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
- A01K63/045—Filters for aquaria
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
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Abstract
The invention provides a circulating water high-density fish culture device and a fish culture method thereof, wherein the device comprises a culture pond, a pressurizing and oxygen-increasing device, an oxygen source and a plurality of purifying and filtering devices, wherein the pressurizing and oxygen-increasing device and the oxygen source are connected with the culture pond; the aquaculture pond is connected to a first purification and filtration device, the last purification and filtration device is connected with the pressurizing and oxygen increasing device, sewage in the aquaculture pond is discharged to enter the first purification and filtration device, sewage is subjected to multiple purification and filtration through a sewage filter of each purification and filtration device to form aquaculture water, and the aquaculture water is supplemented with water through the pressurizing and oxygen increasing device to the aquaculture pond, so that the water level of the aquaculture pond is always kept at a set water level. The circulating water high-density fish culture device has the functions of simultaneously solving the oxygenation problems of two modes, solving the oxygenation problem under different conditions, realizing the characteristic of high-density circulating water and being suitable for freshwater and seawater fish culture environments.
Description
Technical Field
The invention relates to the technical field of fishery water treatment equipment, in particular to a circulating water high-density fish culture device and a method thereof.
Background
The development of intensive high-density culture technology plays an important role in the future aquaculture industry. The potential of developing high-density fresh water fish culture by utilizing lakes, reservoirs and ditches is great. Suitable freshwater fish culture modes include cage fish culture, fence fish culture, running water fish culture and the like. Chinese patent CN 201511013027.5 discloses a gathering type internal circulation fish farming equipment and a fish farming method, Chinese patent CN201410158549.3 discloses a high-density fish farming method, and Chinese patent CN201720762762.4 discloses a high-density fish farming pond, wherein the fish farming pond or the fish farming method of the three patents is complex, has single performance and function, and cannot ensure to solve the problem of diversification of oxygenation. It is therefore desirable to provide a fish farming apparatus that achieves high density and is economical.
Disclosure of Invention
The invention aims to provide a circulating water high-density fish culture device and a method thereof, which can simultaneously solve the oxygenation function of two ways and the oxygenation problem under different conditions.
The invention provides a circulating water high-density fish culture device which comprises a culture pond, a pressurizing and oxygen-increasing device, an oxygen source connected with the pressurizing and oxygen-increasing device and a plurality of purifying and filtering devices which are sequentially connected and arranged in parallel, wherein the pressurizing and oxygen-increasing device and the oxygen source are both connected with the culture pond; the plurality of purifying and filtering devices comprise a first purifying and filtering device, a second purifying and filtering device, … and an Nth purifying and filtering device, wherein the (N-1) th purifying and filtering device is connected to the nth purifying and filtering device, and N is less than or equal to N; each purifying and filtering device is internally provided with a bacteria house, filter cotton and a filter screen in sequence, and the bacteria house, the filter cotton and the filter screen are connected in series to form a sewage filter; the aquaculture pond is connected to a first purification and filtration device, the last purification and filtration device is connected with the pressurizing and oxygen increasing device, sewage in the aquaculture pond is discharged to enter the first purification and filtration device, sewage is subjected to multiple purification and filtration through a sewage filter of each purification and filtration device to form aquaculture water, and the aquaculture water is supplemented with water through the pressurizing and oxygen increasing device to the aquaculture pond, so that the water level of the aquaculture pond is always kept at a set water level.
Furthermore, the circulating water high-density fish culture device also comprises a circulating water supply device which is connected with the culture pond, the pressurizing and oxygen increasing device and the oxygen source.
Further, the circulating water supply device comprises a water supply calandria, a plurality of pipe ejectors connected with the water supply calandria and water inlet pipe gas-liquid mixing nozzles connected with each pipe ejector, wherein one end of the water supply calandria is connected with an oxygen source through the plurality of pipe ejectors, the other end of the water supply calandria is connected with the pressurizing and oxygen-increasing device, and the water inlet pipe gas-liquid mixing nozzles are connected with the culture pond.
Furthermore, the culture pond comprises a plurality of pond bodies which are made of the same materials and have the same structure and are arranged in parallel, each pond body is barrel-shaped, a through hole is formed in the barrel wall of each pond body, and the water inlet pipe is installed at the corresponding through hole through gas-liquid mixing and spraying.
Furthermore, the cell body is provided with a steam-water mixed outlet close to the upper end of the cell body, a drain outlet located at the bottom of the cell body, an overflow pipe opening close to the upper end of the cell body, a sewage discharge double-U pipe connected with the overflow pipe opening and the drain outlet, a sewage discharge limiting point arranged in the sewage discharge double-U pipe and a sewage discharge double-U pipe connected with the sewage discharge double-U pipe to form a sewage discharge connection pipe, and the drain outlet is located in the sewage discharge double-U pipe and used for discharging sewage and sewage in the culture pond to enter the sewage discharge.
Further, the sewage discharge double-U pipe comprises an overflow straight pipe which extends to the culture pond and is connected with the overflow pipe opening; the bottom center of the tank body is provided with a through hole for the straight overflow pipe to pass through and be fixed, and the straight overflow pipe extends into the tank body through the through hole.
Further, the ejector for the pipe comprises a water inlet end, an ejection end and an air inlet groove for connecting the water inlet end and the ejection end.
Further, the oxygen source comprises an oxygen pipeline connected with the plurality of pipe ejectors and an oxygen tank connected with the oxygen pipeline; the oxygen tank is connected with the pressurizing and oxygen increasing device.
Furthermore, the pressure boost oxygenation device includes with the pressure boost oxygenation jar that the oxygen jar is connected, the multistage centrifugal pump body of being connected with pressure boost oxygenation jar, the motor of being connected with multistage centrifugal pump body one end, the inlet tube and the intake pipe of being connected with the multistage centrifugal pump body other end, and wherein the one end of intake pipe is connected between oxygen source and pressure boost oxygenation jar, and the intake pipe other end is connected between multistage centrifugal pump body and inlet tube.
The invention also provides a method of the circulating water high-density fish culture device, which comprises the following steps:
s1: the device comprises a culture pond, a circulating water supply device, an oxygen source, a pressurizing and oxygen-increasing device, a plurality of purifying and filtering devices and an electrical appliance control device, wherein the culture pond, the circulating water supply device, the oxygen source, the pressurizing and oxygen-increasing device, the purifying and filtering devices and the electrical appliance control device are arranged to form a circulating water high-density fish culture device, and whether the circulating water high-density;
s2: after confirming that the circulating water high-density fish culture device has no problem, putting the fish into the culture pond, and continuously observing for more than 24 hours;
s3: when the device is used, the pollution of the culture pond is settled at the bottom of the culture pond, flows to the bottom of the culture pond along with the rotating water flow, enters the first purifying and filtering device through the filter tank, and forms culture water after multiple purification and filtration of sewage through the sewage filter of each purifying and filtering device;
s4: the aquaculture water which is purified and filtered by the plurality of purifying and filtering devices enters the aquaculture pond again after passing through the pressurizing and oxygen increasing device and the circulating water supply device;
in the process of steps S1 to S4, oxygen is provided by an oxygen source or a pressurized oxygen increasing device.
The circulating water high-density fish culture device has the functions of simultaneously solving the oxygenation problems of two modes, solving the oxygenation problem under different conditions, realizing the characteristic of high-density circulating water and being suitable for freshwater and seawater fish culture environments.
Drawings
The invention is further illustrated with reference to the following figures and examples:
FIG. 1 is a schematic structural view of a circulating water high-density fish farming apparatus according to the present invention;
FIG. 2 is an enlarged view of a single culture pond of the circulating water high density fish farming plant of FIG. 1;
FIG. 3 is an enlarged view of a portion K of the circulating water high density fish farming plant shown in FIG. 1;
FIG. 4 is an enlarged view of a portion B3 of the circulating water high density fish farming plant shown in FIG. 1;
FIG. 5 is a schematic structural view of a pressure increasing and oxygen increasing device of the circulating water high-density fish farming device shown in FIG. 1.
The arrows in the figure indicate the direction of the sewage flow.
Detailed Description
The invention relates to a circulating water high-density fish culture device, which comprises a culture pond YZ, a pressurizing and oxygen-increasing device ZY, an oxygen source YY, a plurality of purifying and filtering devices JH and an electric appliance control device (not shown) which are sequentially connected and arranged in parallel, wherein the oxygen source YY and the purifying and filtering devices JH are both connected with the pressurizing and oxygen-increasing device ZY.
The multiple purifying and filtering devices JH comprise a first purifying and filtering device, a second purifying and filtering device, … and an Nth purifying and filtering device, wherein the (N-1) th purifying and filtering device is connected to the nth purifying and filtering device, and N is less than or equal to N; the culture pond YZ is connected to a first purifying and filtering device through a pipeline (not shown), the last purifying and filtering device is connected with a pressurizing and oxygen increasing device ZY, sewage in the culture pond YZ is discharged into the first purifying and filtering device, then the sewage is purified through a plurality of purifying and filtering devices in sequence to form water which can be cultured, and the culture water is supplemented with water through the pressurizing and oxygen increasing device ZY to the culture pond YZ, so that the water level of the culture pond YZ is always kept at a set water level.
The multiple purifying and filtering devices JH also comprise filtering pipes JHI connected with the culture pond YZ, each purifying and filtering device is internally sequentially provided with a bacteria room JH4, filtering cotton JH3 and a filtering net JH2, the bacteria room JH4, the filtering cotton JH3 and the filtering net JH2 are connected in series end to end in the corresponding purifying and filtering device by adopting pipelines to form a sewage filter, and the sewage filter and the culture pond YZ are assembled in parallel to form the purifying and filtering device.
As shown in fig. 2, the culture pond YZ comprises a plurality of pond bodies a which are made of the same material and structure and are arranged in parallel, the pond bodies a are made of cement, plastics and metal materials to form a cylindrical shape, the pond bodies a are provided with a steam-water mixing outlet a1 close to the upper ends of the pond bodies, a sewage discharge outlet a2 positioned at the bottom of the pond bodies, an overflow pipe opening A3 close to the upper ends of the pond bodies, a sewage discharge double-U pipe A5 which is connected with the overflow pipe opening A3 and the sewage discharge outlet a2, a sewage discharge limit point A6 arranged in the sewage discharge double-U pipe A5, and a sewage discharge double-U pipe A5 connected with the sewage discharge double-U pipe A7, and the sewage discharge outlet a2 is positioned in the sewage discharge double-U pipe A5 and allows sewage and sewage discharged from.
The sewage discharge double U-shaped pipe A5 is processed into a double concave type connection with a siphon function by adopting plastic stainless steel, is discharged from an outlet of the sewage discharge connecting pipe A7 when the water level of the pool body A is set, and is connected to the purifying and filtering device JH through a pipeline.
The sewage disposal double U-shaped pipe A5 comprises an overflow straight pipe A4 which extends to the culture pond A and is connected with an overflow pipe port A3. The center of the bottom of the tank body A is provided with a through hole (not shown) for the water overflow straight pipe A4 to pass through and fix, and the water overflow straight pipe A4 extends into the tank body A through the through hole. When the sewage discharge double U-shaped pipe A5 reaches the set water level of the tank body A, the sewage discharge double U-shaped pipe A5 is discharged from the outlet of the sewage discharge connecting pipe A7 and is connected to a first purifying and filtering device through a pipeline.
As shown in fig. 3, the circulating water high-density fish culture device further comprises a circulating water supply device B, and the circulating water supply device B is connected with the culture pond YZ, the pressurizing and oxygen-increasing device ZY and the oxygen source YY. The circulating water supply device B comprises a water supply calandria B2, a plurality of pipe jet devices B3 connected with the water supply calandria B2 and a water inlet pipe gas-liquid mixing nozzle B4 connected with each pipe jet device B3. One end of the water supply calandria B2 is connected with the oxygen source YY through a plurality of tube ejectors B3, and the other end of the water supply calandria B2 is connected with the pressurizing and oxygen increasing device ZY; each jet device B3 corresponds to a pool body A.
An oval through hole A8 is processed at the position 15 cm away from the barrel opening on the barrel wall of each pond body A, a gas-liquid mixing nozzle B4 of a water inlet pipe is installed at the corresponding oval through hole A8, namely the gas-liquid mixing nozzle B4 of the water pipe is connected with the oval through hole A8 and a jet device B3 for the pipe, the aim of siphoning oxygen is achieved by water inflow, namely, a gas source is introduced into water flow to form gas-liquid mixed liquid for supplementing water and increasing oxygen for a YZ culture pond while water is supplied.
As shown in fig. 4, the pipe jet B3 is preferably injection molded from a wear resistant plastic and includes a water inlet end B31, an injection end B32, and an air inlet recess B33 connecting the water inlet end B31 and the injection end B32. The water inlet end B31 is provided with a water inlet cavity B311 and a water inlet end sealing groove B312 arranged outside the water inlet cavity B311; the ejection end B32 is provided with a steam-water diffusion cavity B321 and an ejection end sealing groove B322 arranged outside the steam-water diffusion cavity B321; an intake through hole B331 is provided in the intake recess B33.
The pipe is fixed in a water inlet pipe gas-liquid mixing nozzle B4 by a jet device B3, and a gas source is introduced into water flow to form gas-liquid mixed liquid for supplementing water and increasing oxygen for the culture pond A while supplying water.
The oxygen source YY includes an oxygen line C1 connected to a plurality of tube ejectors B3 and an oxygen tank C2 connected to an oxygen line C1.
As shown in fig. 5, the supercharging oxygen increasing device ZY includes a supercharging oxygen increasing tank ZYD connected with an oxygen tank C2, a multi-stage centrifugal pump body ZYC connected with the supercharging oxygen increasing tank ZYD, a motor ZYE connected with one end of the multi-stage centrifugal pump body ZYC, a water inlet pipe ZYA connected with the other end of the multi-stage centrifugal pump body ZYC, and an air inlet pipe ZYB, wherein one end of the air inlet pipe ZYB is connected between the oxygen tank C2 and the supercharging oxygen increasing tank ZYD, and the other end of the air inlet pipe ZYB is connected between the multi-stage centrifugal pump body ZYC and the water inlet pipe ZYA.
The electrical control device comprises a case and an intelligent control instrument, and the circulating water high-density fish culture device is intelligently controlled.
When in use, if the oxygen source YY is checked to be in fault, the pressurizing oxygenation tank ZYD carries out the replacement work; if the detection is that the pressurizing oxygenation tank ZYD is in fault, the oxygen source YY carries out the replacement work; therefore, YZ anoxic accidents of the culture pond can not occur. The filter tank JH1 is connected to a first purifying and filtering device, sewage is subjected to multiple purification and filtration through a sewage filter of each purifying and filtering device to form aquaculture water, the aquaculture water is input into a pressurizing and oxygen-increasing device ZY, then is input into a water supply calandria B2 of a circulating water supply device B through the pressurizing and oxygen-increasing device ZY, enters a aquaculture pond YZ through a jet device B3, and also can be directly input into a plurality of tube jet devices B3 through an oxygen source YY to enter the aquaculture pond YZ, so that high-density fish culture is achieved.
The invention also discloses a method for the circulating water high-density fish culture device, which comprises the following steps:
s1: the culture pond YZ, the circulating water supply device B, the oxygen source YY, the pressurizing and oxygen increasing device ZY, the plurality of purifying and filtering devices JH and the electrical appliance control device are arranged to form a circulating water high-density fish culture device, and whether the circulating water high-density fish culture device has problems or not is confirmed;
s2: after confirming that the circulating water high-density fish culture device has no problem, putting the fish into the culture pond YZ, continuously observing for more than 24 hours, and arranging culture workers to be on duty and normally putting the fish into use;
s3: when the device is used, the pollution of the culture pond YZ is settled at the bottom of the culture pond YZ, the pollution flows to the bottom of the culture pond YZ along with the rotating water flow, enters a first purifying and filtering device through the filter tank JH1, and the sewage is subjected to multiple purification and filtration through the sewage filter of each purifying and filtering device to form culture water;
s4: the aquaculture water which is purified and filtered by the plurality of purifying and filtering devices JH enters the aquaculture pond YZ again after passing through the pressurizing and oxygen increasing device ZY and the circulating water supply device B.
In the process of steps S1 to S4, oxygen may be provided from the oxygen source YY or the pressurizing oxygen increasing device ZY.
In the step S1, the culture pond A, the circulating water supply device B, the oxygen source YY, the pressurizing and oxygen-increasing device ZY, the purifying and filtering devices JH and the electrical appliance control device are reliably fixed in the installation process, no electrical appliance leaks from the circulating water supply device B, water is injected into the circulating water high-density fish culture device after the circulating water high-density fish culture device is installed for startup test operation, whether a control instrument of the electrical appliance control device is normally displayed is observed, and the circulating water high-density fish culture device can be confirmed to have no problem only when the control instrument of the electrical appliance control device reaches the design requirement and normally operates for more than 24 hours.
In step S3, in step S3, the overflow pipe A3 of the water flowing to the bottom of the culture pond YZ and supplied with water sequentially enters the sewage discharge double U-pipe a5 and the sewage discharge connecting pipe a7, the sewage discharge connecting pipe a7 generates siphon effect, the sewage sequentially enters the first purifying and filtering device through the filter tank JH1, and the sewage passes through the sewage filter of each purifying and filtering device to be subjected to multiple purification and filtering to form culture water. The circulating water high-density fish culture device has the functions of simultaneously solving the oxygenation problems of two modes, solving the oxygenation problem under different conditions, realizing the characteristic of high-density circulating water and being suitable for freshwater and seawater fish culture environments.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. A circulating water high-density fish culture device comprises a culture pond, a pressurizing and oxygen-increasing device, an oxygen source connected with the pressurizing and oxygen-increasing device and a plurality of purifying and filtering devices which are sequentially connected and arranged in parallel, and is characterized in that the pressurizing and oxygen-increasing device and the oxygen source are both connected with the culture pond; the plurality of purifying and filtering devices comprise a first purifying and filtering device, a second purifying and filtering device, … and an Nth purifying and filtering device, wherein the (N-1) th purifying and filtering device is connected to the nth purifying and filtering device, and N is less than or equal to N; each purifying and filtering device is internally provided with a bacteria house, filter cotton and a filter screen in sequence, and the bacteria house, the filter cotton and the filter screen are connected in series to form a sewage filter; the aquaculture pond is connected to a first purification and filtration device, the last purification and filtration device is connected with the pressurizing and oxygen increasing device, sewage in the aquaculture pond is discharged to enter the first purification and filtration device, sewage is subjected to multiple purification and filtration through a sewage filter of each purification and filtration device to form aquaculture water, and the aquaculture water is supplemented with water through the pressurizing and oxygen increasing device to the aquaculture pond, so that the water level of the aquaculture pond is always kept at a set water level.
2. The circulating water high-density fish culture device of claim 1, wherein: the circulating water high-density fish culture device also comprises a circulating water supply device which is connected with the culture pond, the pressurizing and oxygen increasing device and the oxygen source.
3. The circulating water high-density fish culture device of claim 2, wherein: the circulating water supply device comprises a water supply calandria, a plurality of pipe ejectors connected with the water supply calandria and water inlet pipe gas-liquid mixing nozzles connected with each pipe ejector, wherein one end of the water supply calandria is connected with an oxygen source through the plurality of pipe ejectors, the other end of the water supply calandria is connected with the pressurizing and oxygen-increasing device, and the water inlet pipe gas-liquid mixing nozzles are connected with the culture pond.
4. The circulating water high-density fish culture device of claim 3, wherein: the culture pond comprises a plurality of pond bodies which are made of the same materials and have the same structure and are arranged in parallel, each pond body is barrel-shaped, a through hole is formed in the barrel wall of each pond body, and the water inlet pipe is installed at the corresponding through hole through gas-liquid mixing and spraying.
5. The circulating water high-density fish culture device of claim 4, wherein: the cell body is equipped with the mixed export of soda that is close to its upper end, is located the drain of its barrel head, is close to its upper end overflow pipe mouth, all with the two U pipes of blowdown that overflow pipe mouth and drain are connected, set up the blowdown limit point in the two U pipes of blowdown and take over in the blowdown with the two U union couplings of blowdown, the drain is located the two U pipes of blowdown and supplies to discharge the sewage and the filth entering blowdown of breeding the pond in the two U pipes of blowdown.
6. The circulating water high-density fish culture device of claim 4, wherein: the sewage discharge double-U pipe comprises an overflow straight pipe which extends to the culture pond and is connected with the overflow pipe opening; the bottom center of the tank body is provided with a through hole for the straight overflow pipe to pass through and be fixed, and the straight overflow pipe extends into the tank body through the through hole.
7. The circulating water high-density fish culture device of claim 4, wherein: the pipe ejector comprises a water inlet end, an ejection end and an air inlet groove connected with the water inlet end and the ejection end.
8. The circulating water high-density fish culture device of claim 4, wherein: the oxygen source comprises an oxygen pipeline connected with the plurality of pipe ejectors and an oxygen tank connected with the oxygen pipeline; the oxygen tank is connected with the pressurizing and oxygen increasing device.
9. The circulating water high-density fish farming device of claim 8, wherein: the pressure boost oxygenation device comprises a pressure boost oxygenation tank connected with the oxygen tank, a multistage centrifugal pump body connected with the pressure boost oxygenation tank, a motor connected with one end of the multistage centrifugal pump body, a water inlet pipe connected with the other end of the multistage centrifugal pump body and an air inlet pipe, wherein one end of the air inlet pipe is connected between the oxygen source and the pressure boost oxygenation tank, and the other end of the air inlet pipe is connected between the multistage centrifugal pump body and the water inlet pipe.
10. A method of a circulating water high-density fish culture device is characterized by comprising the following steps:
s1: the device comprises a culture pond, a circulating water supply device, an oxygen source, a pressurizing and oxygen-increasing device, a plurality of purifying and filtering devices and an electrical appliance control device, wherein the culture pond, the circulating water supply device, the oxygen source, the pressurizing and oxygen-increasing device, the purifying and filtering devices and the electrical appliance control device are arranged to form a circulating water high-density fish culture device, and whether the circulating water high-density;
s2: after confirming that the circulating water high-density fish culture device has no problem, putting the fish into the culture pond, and continuously observing for more than 24 hours;
s3: when the device is used, the pollution of the culture pond is settled at the bottom of the culture pond, flows to the bottom of the culture pond along with the rotating water flow, enters the first purifying and filtering device through the filter tank, and forms culture water after multiple purification and filtration of sewage through the sewage filter of each purifying and filtering device;
s4: the aquaculture water which is purified and filtered by the plurality of purifying and filtering devices enters the aquaculture pond again after passing through the pressurizing and oxygen increasing device and the circulating water supply device;
in the process of steps S1 to S4, oxygen is provided by an oxygen source or a pressurized oxygen increasing device.
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