CN218104573U - Water-recycling type aquaculture system - Google Patents

Abstract

The utility model provides a circulating water type aquaculture system, which comprises a water treatment tank and an aquaculture tank, wherein the water treatment tank comprises an outer tank, an inner tank and a tank bottom; the outer tank and the inner tank are both cylindrical and coaxially arranged on the tank bottom, the tank top of the inner tank is higher than the tank top of the outer tank, and the tank bottom is shaped like a pot bottom; a water circulation system is arranged between the water treatment pool and the culture pool, and comprises a plurality of first water pumping pipes and a plurality of shunt pipes for conveying sewage at the bottom of the culture pool to the inner pool, a backflow pipe and a plurality of water outlet pipes for conveying a water source in the inner pool to the outer pool, and a plurality of second water pumping pipes for conveying the water source from the outer pool to the culture pool, wherein a first water pump is arranged on each first water pumping pipe, and a second water pump is arranged on each second water pumping pipe; aeration systems are arranged in the water treatment tank and the culture tank; a sewage discharge system is arranged in the inner pool. The utility model discloses, sewage treatment is efficient, realizes water cyclic utilization.

Description

Water recycling type aquaculture system

Technical Field

The utility model belongs to the technical field of industrialization mandarin fish is bred, a circulation water formula aquaculture system is related to.

Background

With the rapid growth of aquaculture production, the specific gravity of aquaculture in aquaculture industry is also increasing. Aquaculture is mainly divided into two categories: one is intensive culture in a pond, high yield is obtained by feeding and fertilizing, and aquatic products with different feeding properties are subjected to mixed culture to fully exert the productivity of water bodies; the other is to breed in large and medium-sized waters such as sea ponds, lakes and reservoirs, and obtain aquatic products mainly by means of natural baits.

In intensive pond culture, methods such as flowing water, temperature control, oxygenation, high-quality bait feeding and the like are generally adopted to carry out high-density culture in a small water body so as to obtain high yield, such as flowing water high-density fish and shrimp culture, while the water in the conventional culture pond has no fluidity, and the excrement of a residual bait machine can be accumulated in the culture pond in long-term culture, so that the water quality is easily deteriorated, the growth of aquatic organisms is not facilitated, and even the mass death is caused, so that the serious economic loss is caused.

In the culture process, the pond water needs to be replaced in time, a direct water replacement mode is generally adopted, sewage is directly discharged, and the water source cannot be recycled.

SUMMERY OF THE UTILITY MODEL

The utility model aims at having the above-mentioned problem to current technique, provided a water recycling formula aquaculture system, this utility model realizes the high-efficient purification and the recycling of sewage.

The purpose of the utility model can be realized by the following technical proposal:

a circulating water type aquaculture system comprises a water treatment tank and an aquaculture tank, wherein the water treatment tank comprises an outer tank, an inner tank and a tank bottom;

the outer tank and the inner tank are both cylindrical and are coaxially arranged on the tank bottom, the tank top of the inner tank is higher than the tank top of the outer tank, and the tank bottom is shaped like a pot bottom;

a water circulation system is arranged between the water treatment pool and the culture pool, the water circulation system comprises a plurality of first water pumping pipes and a plurality of shunt pipes for conveying sewage at the bottom of the culture pool to the inner pool, a return pipe and a plurality of water outlet pipes for conveying a water source in the inner pool to the outer pool, and a plurality of second water pumping pipes for conveying the water source from the outer pool to the culture pool, wherein a first water pump is arranged on the first water pumping pipe, and a second water pump is arranged on the second water pumping pipe;

aeration systems are arranged in the water treatment tank and the culture tank;

a sewage discharge system is arranged in the inner pool.

Furthermore, the water inlet end of the first water pumping pipe is positioned at the bottom of the culture pond, and the water outlet end of the first water pumping pipe extends into the inner pond and is connected with the plurality of flow dividing pipes; the plurality of flow dividing pipes are communicated with each other to form a net shape and are horizontally arranged at the lower part of the inner pool, a first space for a return pipe to pass through is reserved among the plurality of flow dividing pipes, and a plurality of water and sewage separators are arranged at the bottoms of the flow dividing pipes; the bottom of the return pipe is fixed on the bottom of the pool, the return pipe is positioned in the inner pool, the top of the return pipe is lower than the top of the inner pool, the upper part of the return pipe is provided with a plurality of return holes along the circumferential surface of the return pipe, and the bottom of the return pipe is respectively connected with a plurality of water outlet pipes along the circumferential surface of the return pipe; the water outlet pipe penetrates through the peripheral wall of the inner tank to extend into the outer tank, and a plurality of water outlet holes are formed in the peripheral surface of the part of the water outlet pipe, which is positioned in the outer tank; the water inlet end of the second water pumping pipe extends into the bottom or the lower part of the outer pond, and the water outlet end of the second water pumping pipe extends into the culture pond.

Furthermore, the flow dividing pipes comprise a first flow dividing pipe and a second flow dividing pipe, the inner diameter of the first flow dividing pipe is smaller than that of the first water pumping pipe and larger than that of the second flow dividing pipe, the water outlet end of the first water pumping pipe is simultaneously connected with the water inlet ends of the plurality of first flow dividing pipes, and the water outlet end of the first flow dividing pipe is simultaneously connected with the water inlet ends of the plurality of second flow dividing pipes; the first shunt pipes are arranged in a shape like a Chinese character 'kou', 'ri' or 'mu', and the second shunt pipes are connected in a net shape or arranged among the first shunt pipes in parallel.

Furthermore, a first support and a second support are arranged inside the inner pool, the first support is positioned above the second support, a first steel wire mesh is fixed on the upper surface of the first support, and a second steel wire mesh is fixed on the upper surface of the second support; a first biological filler is filled between the first support and the second support, a second biological filler is filled above the first support, the height of the second biological filler is lower than the top of the return pipe, and a third biological filler is filled in the outer pool; spaces or through holes for the backflow pipe and the first shunt pipe to penetrate downwards are reserved or formed in the first steel wire mesh, the first support, the second steel wire mesh and the second support; the shunt tube is fixed at the bottom of the second bracket.

Further, the aeration system comprises a plurality of aeration pipes and a plurality of first air pipes; the aeration pipes are mutually communicated and are in a net shape, the air outlet end of each first air pipe is connected with the air inlet end of one of the aeration pipes, the air inlet ends of the first air pipes are connected with a first aeration main pipe, and the first aeration main pipe is connected with a first air pump; a plurality of aeration pipes are fixed in the bottom of first support, have all seted up a plurality of aeration holes on every aeration pipe, leave the second space that supplies back flow and first drinking-water pipe to pass between a plurality of aeration pipes.

Furthermore, aeration systems includes a plurality of aeration pieces and a plurality of second trachea, and a plurality of aeration pieces are evenly placed in the bottom in outer pond along the annular, and the tracheal end of giving vent to anger of second is connected to the inlet end of every aeration piece, and the tracheal inlet end of a plurality of second connects second aeration house steward, and second aeration house steward connects the second air pump.

Further, the sewage discharge system comprises a fixed pipe, a sewage discharge pump, a sewage discharge pipe and a sewage inlet pipe; the fixed pipe is arranged on the outer side of the return pipe and is parallel to the return pipe, the fixed pipe downwards penetrates through the first steel wire mesh, the first space, the second steel wire mesh and the second space, and a space for the sewage inlet pipe to extend into the inner tank is reserved between the bottom of the fixed pipe and the bottom of the tank; the sewage pump is a submersible pump, and the sewage discharge pipe and the sewage inlet pipe are respectively connected with the liquid outlet end and the liquid inlet end of the sewage pump; the sewage inlet pipe is a hose.

Further, the first biological filler is MBBR filler with the model number of K1; the second biological filler is MBBR filler with the model number of K3; the third biological filler is MBBR filler with the model number of K5.

Furthermore, a filter screen is arranged at the water inlet end of the second water pumping pipe.

Further, the inner diameter of the outer tank is 8m, and the inner diameter of the inner tank is 3.5m; the height between the second support and the bottom of the pool is 30-40cm, the distance between the first support and the second support is 60-65cm, and the distance between the first support and the top of the inner pool is 1.0-1.2m; the filling thickness of the first biological filler on the second bracket is 30-40cm; the filling thickness of the second biological filler on the first bracket is 30-60cm; the filling thickness of the third biological filler in the outer pool is 20-40cm; the distance between the top of the return pipe and the top of the inner pool is 15-20cm; the number of the water and sewage separators is 200-220; the inner diameter of the first water pumping pipe is 100mm, the inner diameter of the first shunt pipe is 75mm, the inner diameter of the second shunt pipe is 50mm, and the diameter of the water outlet pipe is 75-100mm; the diameter of the aeration pipe is 50mm.

Compared with the prior art, the water recycling type aquaculture system has the following advantages:

the utility model discloses in, the shape of bottom of the pool is the bottom of a boiler form, is favorable to concentrating the dirt of bottom of the pool to the center, and rethread drainage system in time discharges the dirt, improves blowdown efficiency. The top of the inner pool is higher than that of the outer pool, and a water pressure difference is formed between the inner pool and the outer pool, so that the normal work of the return pipe and the water outlet pipes is ensured. The water circulation system is used for connecting the water treatment pool and the culture pool to realize the water circulation use process between the water treatment pool and the culture pool, and the water treatment pool is used for purifying sewage; wherein, the first pumping pipe pumps the sewage at the bottom of the culture pond and conveys the sewage into the inner pond. The sewage is primarily purified in the inner tank and then discharged into the outer tank, then the part of sewage is continuously purified in the outer tank for the second time, and finally, the part of purified water flows back into the culture tank through the second water pumping pipe; dirt deposited at the bottom of the inner tank is discharged to the septic tank or the treatment tank through the sewage discharge system.

The utility model discloses in, first drinking-water pipe takes out the sewage of breeding pond bottom of the pool and carries to the reposition of redundant personnel intraductally, under the mating reaction of shunt tubes and dirty separator of water, the speed of alleviating sewage downward flow by the largest margin, and the bottom of pond in discharging sewage, the inside upward flow of pond including avoiding this sewage, avoid sewage and the original water of interior 12 insides of pond to mix on a large scale (the water of interior pond middle part and upper portion is for purifying the water), be favorable to depositing in the pond including the dirt of sewage, in order to be favorable to sewage discharging system to discharge it. A plurality of return water holes are arranged on the upper portion of the return pipe along the circumferential surface of the return pipe, when sewage is subjected to primary purification treatment of partial biological filler in the inner tank, the sewage is added to the bottom of the inner tank again, and a water body treated on the upper portion of the inner tank moves upwards to enter the inner portion of the return pipe through the return water holes and finally enters the outer tank through the water outlet pipe for secondary treatment. After the sewage in the outer pond is treated, the sewage is conveyed into the culture pond through the second water pumping pipe and is reused.

The internal diameter of first drinking-water pipe, first shunt canals and second shunt canals diminishes gradually, but quantity increases gradually, plays fine reposition of redundant personnel effect to can slow down the velocity of water flow, be favorable to subsiding of dirt. The second shunt tubes are connected in a net shape or arranged among the first shunt tubes in parallel, and shunt efficiency and quality are improved. The first biological filler, the second biological filler and the third biological filler are used for purifying the sewage; in the process that the sewage in the inner tank flows upwards, the sewage is firstly purified by the first biological filler, and after the treatment (adding water at the bottom of the inner tank), the part of sewage continuously moves upwards to be purified by the second biological filler; after purification is finished, the sewage is conveyed into the outer tank through the return pipe and the water outlet pipe and is purified through the third biological filler. The first support and the second support have a good supporting effect, the first steel wire mesh and the second steel wire mesh respectively have a good intercepting and limiting effect on the second biological filler and the first biological filler, and the second biological filler and the first biological filler are prevented from being mixed with each other. The shunt tubes are fixed at the bottom of the second support and are more stable, shaking caused by water flow is avoided, and the water flow is more stable.

The utility model discloses in, can be through dragging the mode of drawing the blow off pipe, with the dredge pump with advance dirty pipe and pull out by fixed intraductal, follow and trade, maintain and maintenance to the dredge pump with advance dirty pipe to improve equipment's maintenance efficiency, the blowdown of dredge pump is effectual simultaneously. The sewage inlet pipe is a hose, and is convenient to take and place.

Drawings

Fig. 1 is a schematic view of the reclaimed water circulation system of the present invention.

Fig. 2 is a schematic perspective view of the reclaimed water treatment tank of the present invention.

Fig. 3 is a front view of the reclaimed water treating tank of the present invention.

Fig. 4 is a schematic perspective view of the internal structure of the reclaimed water treatment tank of the present invention.

Fig. 5 is a schematic perspective view of the internal structure of the inner tank of the present invention.

Fig. 6 is an installation schematic diagram of the shunt tube of the present invention.

Fig. 7 is a top view of the first bracket of the present invention.

Fig. 8 is a schematic structural diagram of the sewage system of the present invention.

In the figure, 10, a water treatment tank; 11. an outer pool; 12. an inner pool; 13. the bottom of the pool; 20. a water circulation system; 21. a first pumping pipe; 22. a return pipe; 23. a water outlet pipe 24 and a second water pumping pipe; 25. a first water pump; 26. a second water pump; 27. a first shunt pipe; 28. a second shunt pipe; 29. a water-dirt separator; 30. an aeration system; 31. a first air pipe; 32. an aeration pipe; 33. a second air pipe; 34. an aeration member; 40. a blowdown system; 41. a fixed tube; 42. a sewage pump; 43. a blow-off pipe; 44. a sewage inlet pipe; 50. a culture pond; 61. a water return hole; 62. a first space; 63. a second space; 64. a first bracket; 65. a first steel wire mesh; 66. a second bracket; 67. a second steel wire mesh; 71. a first biological filler; 72. a second biological filler; 73. a third biological filler.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1-8, the present embodiment provides a recirculating aquaculture system, comprising a water treatment tank 10 and an aquaculture tank 50, wherein the water treatment tank 10 comprises an outer tank 11, an inner tank 12 and a tank bottom 13;

the outer tank 11 and the inner tank 12 are both cylindrical and are coaxially arranged on the tank bottom 13, the tank top of the inner tank 12 is higher than the tank top of the outer tank 11, and the tank bottom 13 is shaped like a pot bottom;

a water circulation system 20 is arranged between the water treatment pool 10 and the culture pool 50, the water circulation system 20 comprises a plurality of first water pumping pipes 21 and a plurality of shunt pipes for conveying sewage at the bottom of the culture pool 50 to the inner pool 12, a return pipe 22 and a plurality of water outlet pipes 23 for conveying a water source in the inner pool 12 to the outer pool 11, and a plurality of second water pumping pipes 24 for conveying the water source from the outer pool 11 to the culture pool 50, wherein a first water pump 25 is arranged on the first water pumping pipe 21, and a second water pump 26 is arranged on the second water pumping pipes 24;

aeration systems 30 are arranged in the water treatment tank 10 and the culture tank 50; a sewage system 40 is arranged in the inner pool 12.

The utility model discloses in, the shape of bottom of the pool 13 is the bottom of a boiler form, is favorable to the dirt to the central gathering of bottom of the pool 13, and rethread drainage system 40 in time discharges the dirt, improves blowdown efficiency. The top of the inner tank 12 is higher than that of the outer tank 11, and a height (water pressure) difference is formed between the inner tank 12 and the outer tank 11, so that the normal flow of water flow is ensured, and the return pipe 22 and the water outlet pipes 23 can work normally.

The water circulation system 20 is used for connecting the water treatment tank 10 and the culture tank 50 to realize the water circulation use process between the water treatment tank 10 and the culture tank 50, and the water treatment tank 10 is used for purifying sewage; wherein, the first pumping pipe 21 pumps the sewage at the bottom of the culture pond 50 and conveys the sewage into the inner pond 12. The sewage is primarily purified in the inner tank 12 and then discharged into the outer tank 11, then the part of sewage is continuously purified in the outer tank 11 for the second time, and finally, the part of purified water flows back to the culture tank 50 through the second water pumping pipe 24; dirt deposited on the bottom of the inner tank 12 is discharged to a septic tank or treatment tank by a sewage system 40.

The water inlet end of the first water pumping pipe 21 is positioned at the bottom of the culture pond 50, and the water outlet end of the first water pumping pipe 21 extends into the inner pond 12 and is connected with a plurality of shunt pipes;

a plurality of shunt tubes are communicated with each other to form a net shape and are horizontally arranged at the lower part of the inner tank 12, a first space 62 for the return pipe 22 to pass through is reserved among the shunt tubes, and a plurality of water and sewage separators 29 are arranged at the bottoms of the shunt tubes;

the bottom of the return pipe 22 is fixed on the tank bottom 13, the return pipe 22 is positioned in the inner tank 12, the top of the return pipe 22 is lower than the tank top of the inner tank 12, the upper part of the return pipe 22 is provided with a plurality of return water holes 61 along the circumferential surface, and the bottom of the return pipe 22 is respectively connected with a plurality of water outlet pipes 23 along the circumferential surface;

the water outlet pipe 23 penetrates through the peripheral wall of the inner tank 12 to extend into the outer tank 11, and a plurality of water outlet holes are formed in the peripheral surface of the part, located in the outer tank 11, of the water outlet pipe 23;

the water inlet end of the second water pumping pipe 24 extends into the bottom or the lower part of the outer pond 11, and the water outlet end of the second water pumping pipe 24 extends into the culture pond 50.

The utility model discloses in, the sewage of 50 bottoms of ponds in the pond is bred to first drinking-water pipe 21 is taken out and is carried to the shunt tubes in, under shunt tubes and the cooperation of dirty separator 29 of water, by a wide margin alleviate the speed of sewage downward flow, with the bottom of pond 12 in slowly discharging sewage, avoid sewage in the inside water flow that arouses on a large scale of pond 12, avoid sewage and the original water of interior pond 12 inside to mix on a large scale (the original water on interior pond 12 middle part and upper portion is the water after preliminary purification), be favorable to the dirt in the sewage to deposit in interior pond 12, in order to be favorable to sewage disposal system 40 to discharge it.

The upper part of the return pipe 22 is provided with a plurality of return holes 61 along the circumferential surface thereof, when the sewage is subjected to primary purification treatment by partial biological fillers (a first biological filler 71 and a second biological filler 72) in the inner tank 12, the sewage is added again to the bottom of the inner tank 12, and the water body treated at the upper part of the inner tank 12 moves upwards to enter the inner part of the return pipe 22 through the return holes 61 and finally enters the outer tank 11 through the water outlet pipe 23 for secondary treatment.

After the sewage in the outer tank 11 is subjected to secondary treatment by the biological filler (third biological filler 73), the sewage is conveyed into the culture tank 50 through the second water pumping pipe 24, so that the water body is recycled.

It should be noted that the outer tank 11 and the culture tank 50 are both provided with a sewage discharge pipe and a corresponding sewage discharge system.

The shunt pipes comprise a first shunt pipe 27 and a second shunt pipe 28, the inner diameter of the first shunt pipe 27 is smaller than the inner diameter of the first pumping pipe 21 and larger than the inner diameter of the second shunt pipe 28, the water outlet end of the first pumping pipe 21 is simultaneously connected with the water inlet ends of the plurality of first shunt pipes 27, and the water outlet end of the first shunt pipe 27 is simultaneously connected with the water inlet ends of the plurality of second shunt pipes 28;

the plurality of first shunt tubes 27 are arranged in a shape of a "mouth", "day" or "mesh", and the plurality of second shunt tubes 28 are connected in a mesh shape or arranged in parallel to each other between the plurality of first shunt tubes 27.

The inner diameters of the first pumping pipe 21, the first shunt pipe 27 and the second shunt pipe 28 are gradually reduced, but the number of the first pumping pipe, the first shunt pipe and the second shunt pipe is gradually increased, so that a good shunt effect is achieved, the water flow speed can be reduced, and the sedimentation of dirt is facilitated.

The first shunt pipe 27 is arranged in a shape like a Chinese character 'kou', 'ri' or 'mu', which is beneficial to reserving a first space 62 for the return pipe 22 (and the fixed pipe 41) to pass through;

the second shunt tubes 28 are connected in a net shape or arranged in parallel between the plurality of first shunt tubes 27, so that the shunt efficiency and quality are improved.

A first support 64 and a second support 66 are arranged in the inner pool 12, the first support 64 is positioned above the second support 66, a first steel wire mesh 65 is fixed on the upper surface of the first support 64, and a second steel wire mesh 67 is fixed on the upper surface of the second support 66;

a first biological filler 71 is filled between the first bracket 64 and the second bracket 66, a second biological filler 72 is filled above the first bracket 64, the height of the second biological filler 72 is lower than the top of the return pipe 22, and a third biological filler 73 is filled inside the outer tank 11;

spaces or through holes for the return pipe 22 and the first shunt pipe 27 to pass downwards are reserved or opened on the first steel wire mesh 65, the first support 64, the second steel wire mesh 67 and the second support 66;

the shunt is held at the bottom of the second leg 66.

The first biological filler 71, the second biological filler 72 and the third biological filler 73 are used for purifying sewage; in the process that the sewage in the inner tank 12 flows upwards, the sewage is firstly purified by the first biological filler 71, and after the treatment (adding water to the bottom of the inner tank 12), the part of sewage continuously moves upwards to be purified by the second biological filler 72; after the purification is finished, the sewage is conveyed into the outer tank 11 through the return pipe 22 and the water outlet pipe 23 and purified by the third biological filler 73.

The first support 64 and the second support 66 have a good supporting effect, the first steel wire mesh 65 and the second steel wire mesh 67 respectively have a good intercepting and limiting effect on the second biological filler 72 and the first biological filler 71, and the second biological filler 72 and the first biological filler 71 are prevented from being mixed with each other.

The shunt tubes are fixed at the bottom of the second support 66 and are more stable, so that shaking caused by water flow is avoided, and the water flow is more stable.

Aeration system 30 includes a plurality of aeration tubes 32 and a plurality of first air tubes 31;

the plurality of aeration pipes 32 are mutually communicated to form a net shape, the air outlet end of each first air pipe 31 is connected with the air inlet end of one aeration pipe 32, the air inlet ends of the plurality of first air pipes 31 are connected with a first aeration main pipe, and the first aeration main pipe is connected with a first air pump;

the plurality of aeration pipes 32 are fixed at the bottom of the first support 64, each aeration pipe 32 is provided with a plurality of aeration holes, and a second space 63 for the return pipe 22 and the first water pumping pipe 21 to pass through is reserved between the plurality of aeration pipes 32.

The first air pump supplies oxygen to the first air pipes 31 through the first aeration main pipe, the first air pipes 31 supply oxygen to the aeration pipes 32, and the aeration pipes 32 supply oxygen to the second biological filler 72 and promote the second biological filler 72 to roll, so that the sewage treatment is accelerated; each aeration pipe 32 is provided with a plurality of aeration holes, so that the aeration amount in unit time is improved, and the sewage treatment efficiency and the treatment quality are improved.

The aeration system 30 comprises a plurality of aeration pieces 34 and a plurality of second air pipes 33, the aeration pieces 34 are uniformly arranged at the bottom of the outer pool 11 along the annular shape, the air inlet end of each aeration piece 34 is connected with the air outlet end of one second air pipe 33, the air inlet ends of the second air pipes 33 are connected with a second aeration main pipe, and the second aeration main pipe is connected with a second air pump.

The second air pump supplies oxygen to the second air pipes 33 through the second aeration main pipe, so that oxygen is supplied to the aeration pieces 34, the aeration pieces 34 supply oxygen to the third biological filler 73, and the third biological filler 73 is enabled to roll, so that the purification of the sewage by the third biological filler 73 is facilitated.

In summary, the first biological filler 71 mainly contains anaerobic bacteria, the second biological filler 72 and the third biological filler 73 mainly contain aerobic bacteria, and the anaerobic bacteria and the aerobic bacteria are used for performing biological purification treatment on sewage; the aeration process can make the second biological filler 72 and the third biological filler 73 roll, so as to be fully contacted with the sewage and the oxygen, thereby improving the purification effect of the sewage.

The sewage system 40 includes a fixed pipe 41, a sewage pump 42, a sewage pipe 43 and a sewage inlet pipe 44;

the fixed pipe 41 is arranged on the outer side of the return pipe 22 and is parallel to the return pipe 22, the fixed pipe 41 downwards penetrates through the first steel wire mesh 65, the first space 62, the second steel wire mesh 67 and the second space 63, and a space for the sewage inlet pipe 44 to extend into the inner tank 12 is reserved between the bottom of the fixed pipe 41 and the tank bottom 13;

the sewage pump 42 is a submersible pump, and the sewage discharge pipe 43 and the sewage inlet pipe 44 are respectively connected with the liquid outlet end and the liquid inlet end of the sewage pump 42; the soil inlet pipe 44 is a hose.

The utility model discloses in, can pull out dredge pump 42 and advance dirty pipe 44 by fixed intraductal 41 through dragging the mode that draws blow off pipe 43, have carried out with trading, maintenance and maintenance to dredge pump 42 and advance dirty pipe 44 to improve equipment's maintenance efficiency, while blow off pump 42's blowdown is effectual. The sewage inlet pipe 44 is a hose, which is convenient for taking and placing.

The first biological filler 71 is MBBR filler, the type is K1, the diameter is 11mm, the height is 7mm, 5 filler holes are formed, the wall thickness is 0.36mm, and the specific surface area is 900m < 2 >/m < 3 >;

the second biological filler 72 is MBBR filler with the model number of K3, the diameter of 25mm, the height of 11mm, 19 filler holes, the wall thickness of 0.36mm and the specific surface area of 550m < 2 >/m < 3 >;

the third biological filler 73 is MBBR filler, the type K5, the diameter is 25mm, the height is 4mm, 64 filler holes are formed, the wall thickness is 0.36mm, and the specific surface area is 1226m < 2 >/m < 3 >.

The first biological filler 71, the second biological filler 72 and the third biological filler 73 have good sewage purification effect and high purification efficiency.

The water inlet end of the second pumping pipe 24 is provided with a filter screen.

The screen prevents the third biological charge 73 from being drawn away by the second suction pipe 24.

In an alternative embodiment:

the inner diameter of the outer tank 11 is 8m, and the inner diameter of the inner tank 12 is 3.5m;

the height between the second bracket 66 and the pool bottom 13 is 30-40cm, the distance between the first bracket 64 and the second bracket 66 is 60-65cm, and the distance between the first bracket 64 and the pool top of the inner pool 12 is 1.0-1.2m;

the filling thickness of the first biological filler 71 on the second bracket 66 is 30-40cm;

the filling thickness of the second biological filler 72 on the first bracket 64 is 30-60cm;

the filling thickness of the third biological filler 73 in the outer pool 11 is 20-40cm;

the distance between the top of the return pipe 22 and the top of the inner tank 12 is 15-20cm;

the number of the water pollution separators 29 is 200-220;

the inner diameter of the first pumping pipe 21 is 100mm, the inner diameter of the first shunt pipe 27 is 75mm, the inner diameter of the second shunt pipe 28 is 50mm, and the diameter of the water outlet pipe 23 is 75-100mm;

the diameter of the aeration tube 32 is 50mm.

The equipment has the advantages of use effect, high sewage purification efficiency and high efficiency and quality.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (10)

1. A recirculating aquaculture system comprising a water treatment tank (10) and a culture tank (50), wherein said water treatment tank (10) comprises an outer tank (11), an inner tank (12) and a tank bottom (13);

the outer tank (11) and the inner tank (12) are both cylindrical and are coaxially arranged on the tank bottom (13), the tank top of the inner tank (12) is higher than the tank top of the outer tank (11), and the tank bottom (13) is shaped like a pot bottom;

a water circulation system (20) is arranged between the water treatment pool (10) and the culture pool (50), the water circulation system (20) comprises a plurality of first water pumping pipes (21) and a plurality of shunt pipes, the first water pumping pipes are used for conveying sewage at the bottom of the culture pool (50) to the inner pool (12), a return pipe (22) and a plurality of water outlet pipes (23) are used for conveying a water source inside the inner pool (12) to the outer pool (11), a plurality of second water pumping pipes (24) are used for conveying the water source from the outer pool (11) to the culture pool (50), a first water pump (25) is arranged on each first water pumping pipe (21), and a second water pump (26) is arranged on each second water pumping pipe (24);

aeration systems (30) are arranged in the water treatment tank (10) and the culture tank (50);

a sewage discharge system (40) is arranged in the inner pool (12).

2. A recirculating aquaculture system according to claim 1 wherein the inlet end of said first pumping duct (21) is located at the bottom of the aquaculture pond (50) and the outlet end of said first pumping duct (21) extends into the interior of the inner pond (12) and is connected to a plurality of distribution pipes;

the plurality of the shunt tubes are mutually communicated and are in a net shape and are horizontally arranged at the lower part of the inner pool (12), a first space (62) for a return pipe (22) to pass through is reserved among the plurality of the shunt tubes, and a plurality of water and sewage separators (29) are arranged at the bottoms of the shunt tubes;

the bottom of the return pipe (22) is fixed on the pool bottom (13), the return pipe (22) is positioned in the inner pool (12), the top of the return pipe (22) is lower than the pool top of the inner pool (12), a plurality of return holes (61) are formed in the upper part of the return pipe (22) along the peripheral surface of the return pipe, and the bottom of the return pipe (22) is respectively connected with a plurality of water outlet pipes (23) along the peripheral surface of the return pipe;

the water outlet pipe (23) penetrates through the peripheral wall of the inner tank (12) to extend into the outer tank (11), and a plurality of water outlet holes are formed in the peripheral surface of the part, located in the outer tank (11), of the water outlet pipe (23);

the water inlet end of the second water pumping pipe (24) extends into the bottom or the lower part of the outer pond (11), and the water outlet end of the second water pumping pipe (24) extends into the culture pond (50).

3. A recirculating aquaculture system according to claim 2, characterized in that said distribution pipes comprise a first distribution pipe (27) and a second distribution pipe (28), the internal diameter of said first distribution pipe (27) being smaller than the internal diameter of said first pumping pipe (21) and larger than the internal diameter of said second distribution pipe (28), the water outlet end of said first pumping pipe (21) being connected to the water inlet ends of said first distribution pipes (27) simultaneously, the water outlet end of said first distribution pipe (27) being connected to the water inlet ends of said second distribution pipes (28) simultaneously;

the first shunt pipes (27) are arranged in a shape like a Chinese character 'kou', 'ri' or 'mu', and the second shunt pipes (28) are connected in a net shape or arranged among the first shunt pipes (27) in parallel.

4. A recirculating aquaculture system according to claim 3 wherein said inner tank (12) has a first support (64) and a second support (66) disposed therein, said first support (64) being disposed above said second support (66), said first support (64) having a first wire mesh (65) secured to an upper surface thereof, said second support (66) having a second wire mesh (67) secured to an upper surface thereof;

a first biological filler (71) is filled between the first bracket (64) and the second bracket (66), a second biological filler (72) is filled above the first bracket (64), the height of the second biological filler (72) is lower than the top of the return pipe (22), and a third biological filler (73) is filled inside the outer pool (11);

spaces or through holes for downward penetration of the return pipe (22) and the first shunt pipe (27) are reserved or opened on the first steel wire mesh (65), the first support (64), the second steel wire mesh (67) and the second support (66);

the shunt tube is fixed at the bottom of the second bracket (66).

5. A recirculating aquaculture system according to claim 4, characterized in that the aeration system (30) comprises a plurality of aeration pipes (32) and a plurality of first air pipes (31);

the aeration pipes (32) are communicated with each other to form a net, the air outlet end of each first air pipe (31) is connected with the air inlet end of one aeration pipe (32), the air inlet ends of the first air pipes (31) are connected with a first aeration main pipe, and the first aeration main pipe is connected with a first air pump;

the plurality of aeration pipes (32) are fixed at the bottom of the first support (64), a plurality of aeration holes are formed in each aeration pipe (32), and a second space (63) for the return pipe (22) and the first water pumping pipe (21) to penetrate through is reserved among the plurality of aeration pipes (32).

6. A recirculating aquaculture system according to claim 5, wherein said aeration system (30) comprises a plurality of aeration members (34) and a plurality of second air pipes (33), said aeration members (34) being disposed uniformly along a ring at the bottom of said outer tank (11), the inlet end of each aeration member (34) being connected to the outlet end of one of said second air pipes (33), the inlet ends of said second air pipes (33) being connected to said second aeration header, said second aeration header being connected to said second air pump.

7. A recirculating aquaculture system according to claim 6, wherein the blowdown system (40) comprises a stationary pipe (41), a blowdown pump (42), a blowdown pipe (43) and a blowdown inlet pipe (44);

the fixed pipe (41) is arranged on the outer side of the return pipe (22) and is parallel to the return pipe (22), the fixed pipe (41) downwards penetrates through the first steel wire mesh (65), the first space (62), the second steel wire mesh (67) and the second space (63), and a space for the sewage inlet pipe (44) to extend into the inner tank (12) is reserved between the bottom of the fixed pipe (41) and the tank bottom (13);

the sewage pump (42) is a submersible pump, and a sewage discharge pipe (43) and a sewage inlet pipe (44) are respectively connected with the liquid outlet end and the liquid inlet end of the sewage pump (42);

the sewage inlet pipe (44) is a hose.

8. A recirculating aquaculture system according to claim 7, wherein said first biological filler (71) is MBBR filler, type K1;

the second biological filler (72) is MBBR filler with the model number of K3;

the third biological filler (73) is MBBR filler with the model number of K5.

9. A recirculating aquaculture system according to claim 8 wherein the inlet end of said second pumping duct (24) is provided with a strainer.

10. A recirculating aquaculture system according to claim 9, characterized in that said outer tank (11) has an inner diameter of 8m and said inner tank (12) has an inner diameter of 3.5m;

the height between the second support (66) and the pool bottom (13) is 30-40cm, the distance between the first support (64) and the second support (66) is 60-65cm, and the distance between the first support (64) and the pool top of the inner pool (12) is 1.0-1.2m;

the filling thickness of the first biological filler (71) on the second bracket (66) is 30-40cm;

the filling thickness of the second biological filler (72) on the first bracket (64) is 30-60cm;

the filling thickness of the third biological filler (73) in the outer pool (11) is 20-40cm;

the distance between the top of the return pipe (22) and the top of the inner tank (12) is 15-20cm;

the number of the water and sewage separators (29) is 200-220;

the inner diameter of the first water pumping pipe (21) is 100mm, the inner diameter of the first shunt pipe (27) is 75mm, the inner diameter of the second shunt pipe (28) is 50mm, and the diameter of the water outlet pipe (23) is 75-100mm;

the diameter of the aeration pipe (32) is 50mm.

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