CN113575492A

CN113575492A - Internal circulation culture system

Info

Publication number: CN113575492A
Application number: CN202110853846.XA
Authority: CN
Inventors: 钟传明; 钟国龙
Original assignee: FUJIAN FISHERIES TECHNOLOGY PROMOTION STATION
Current assignee: FUJIAN FISHERIES TECHNOLOGY PROMOTION STATION
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2021-11-02

Abstract

The invention relates to an internal circulation culture system. The sewage treatment device comprises a culture pond and a sewage separation pond communicated with the culture pond; the bottom surface of the sewage separation tank is concave downwards to form an inverted cone-shaped or funnel-shaped concave part, and a sewage discharge device for discharging sewage is arranged at the bottom end of the concave part; a water return device is also arranged in the sewage separation tank. Compared with the prior art, the invention has the beneficial effects that: through being hourglass hopper-shaped in the other filth separation tank and the filth separation tank bottom that sets up in breed pond, the messenger that can be better gets into the breed water filth sediment in filth separation tank and assembles, and convenient follow-up concentrated emission can the at utmost reduce the emission water.

Description

Internal circulation culture system

Technical Field

The invention relates to the field of cultivation, in particular to an internal circulation cultivation system with extremely low water discharge amount for cultivation.

Background

At present, in the aquaculture industry, how to reduce the discharge of water for aquaculture is always a problem to be solved by most enterprises. In order to help the breeding enterprises to solve the problems, the teaching of the inventor's clock of the present application provides a double-circulation zero-emission healthy breeding system in the patent No. ZL201110140191.8, and realizes the recycling of the breeding water by the ' internal and external ' double-circulation purification of the breeding water. However, the scheme is more suitable for breeding enterprises with large land, and the applicability of medium and small-scale breeding enterprises is not strong, the main reason is that the external circulation system of the patent needs large-area ecological systems such as artificial wetlands and the like to purify the environment so as to recycle the breeding water, and under the condition that the current breeding water is 'cost-free', a plurality of medium and small-scale enterprises are not adopted or implemented. Therefore, the inventor of the present invention and others have developed a healthy aquaculture system with fish toilets, patent No. 202020595818.3, which utilizes the internal circulation part in the above patent to perform redesign, and can effectively reduce the discharge amount of aquaculture water without external circulation filtration, wherein the daily discharge amount of the aquaculture water accounts for about 30-50% of the total water amount of the aquaculture pond. However, some breeding enterprises still consider that the drainage amount is large, and hope that the drainage amount can be further reduced, which is beneficial to tail water treatment and sustainable development at the rear end.

Disclosure of Invention

The invention aims to: the problem of current farming systems displacement is big is solved, an inner loop farming systems that displacement is lower has been designed, especially to the individual great, excrement and urine granule is more easily sunken, or the eel of easily producing foam gathering and separation breeds animals such as eel.

The invention is realized by the following technical scheme: an internal circulation culture system comprises a culture pond 1 and a dirt separation pond communicated with the culture pond 1;

the bottom surface of the sewage separation tank is concave downwards to form an inverted cone-shaped or funnel-shaped concave part, and a sewage discharge device for discharging sewage is arranged at the bottom end of the concave part;

a water return device is also arranged in the sewage separation tank.

Compared with the prior art, the invention has the beneficial effects that:

1. breed other filth separation tank that sets up of pond and filth separation tank bottom and be lou hopper-shaped, the breed water filth that makes the entering filth separation tank that can be better deposits and assembles, and convenient follow-up concentrated emission can the at utmost reduce the emission water.

2. The multistage formula design of filth separation tank is mainly the speed reduction that realizes breeding sewage except safe (breed the water pressure difference that pond or filth separation tank evacuation caused and produce danger), lets breed granule excrement and urine not damaged (breakage) in the sewage, easily deposits at the sedimentation tank, through set the sedimentation tank bottom to the back taper or leak hopper-shaped a large amount of collections that realize filth (excrement), later conveniently concentrate the emission.

3. The brush blocking and intercepting rod is additionally arranged and is used for guiding, collecting and eliminating floating objects (mainly floating excrement and protein foam) on the surface of the culture pond, then guiding the floating objects to the dirt separation pond, and regularly eliminating the floating objects through manpower or a floating object blow-off pipe.

4. The biochemical pool is added, and the hairbrush frame structure is matched, so that the aggregation of fine particles, floating algae and bacterial colonies can be realized, the culture sewage can be further purified, and the content of suspended matters (SS), total phosphorus, total nitrogen, BOD and COD can be reduced.

5. The inverted V-shaped design at the bottom of the biochemical pool can be beneficial to gathering and discharging the dead bacteria, algae and other pollutants after falling off.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the sunken part of the invention located in a sedimentation tank, wherein (a) the culture tank is oval, and (b) the culture tank is rectangular;

FIG. 3 is a schematic view of the structure of the dirt separation chamber of FIG. 2;

FIG. 4 is another schematic view of the dirt separation chamber;

FIG. 5 is a top view of an inverted cone or funnel shaped recess near the side of the settling tank;

FIG. 6 is a cross-sectional view A-A of FIG. 5;

FIG. 7 is a top view of an inverted cone or funnel shaped recess near the corner of the settling tank;

FIG. 8 is a schematic structural view of a culture pond with an additional interception rod and a floating object channel;

FIG. 9 is a schematic view of the structure of the floating object collecting pool added on the basis of FIG. 8;

FIG. 10 is a schematic structural view of a biochemical cell;

FIG. 11 is a schematic view of a brush holder;

FIG. 12 is a top view of a biochemical cell.

Description of reference numerals: 1 culture pond, 11 interception rods, 13 floater channels, 14 floater sewage pipes, 2 communication ponds, 21 communication pipes, 22 floater collecting ponds, 3 sedimentation ponds, 31 sewage pipes, 32 water discharge pipes, 4 water return ponds, 41 pneumatic water lifting devices, 42 overflow channels, 5 biochemical chambers, 51 first overflow channels, 52 brush racks, 521 supporting rods, 522 bristles, 54 inverted V-shaped bottom surfaces, 55 sewage outlets, 6 partition plates, 61 water through holes, 62 fences, 63 brushes, 7 water return chambers and 71 water return pipes.

Detailed Description

The invention is described in detail below with reference to the following description of the drawings:

as shown in fig. 1-4:

an internal circulation culture system, which comprises a culture pond 1 and a dirt separation pond (the dirt separation pond is equivalent to a fish toilet or a toilet) communicated with the culture pond 1;

a water return device is also arranged in the sewage separation tank.

The above-mentioned dirt mainly refers to fish and shrimp feces, food residue, body surface fallen matter, dead bacteria and algae, etc.

The sewage separation tank is divided into three communicating tanks 2, a sedimentation tank 3 and a water return tank 4 which are arranged in sequence through two partition plates 6,

the communicating tank 2 is communicated with the bottom of the culture tank 1 through a communicating pipe 21, so that the sewage at the bottom of the culture tank 1 flows into the communicating tank 2;

a water return device is arranged in the water return tank 4, and the culture water from which the particle dirt is removed in the water return tank 4 is discharged into the water return device of the culture tank 1.

Further, the lower concave part is preferably positioned on the bottom surface of the sedimentation tank 3; the bottom of the clapboard 6 is provided with a water through hole 61 with a switch. The water through holes are mainly used for ensuring that the sewage separation tank can be emptied when the sewage separation tank is cleaned; the switch can be a two-way valve or a plug pipe, and the on-off of the water hole is controlled through the two-way valve or the plug pipe.

Compare with early lavatory, through cutting apart the filth separation tank, form three cavity, this design has weakened the effect of intercommunication pond 2, the blowdown of return water pond 4, assembles filth, blowdown and mainly realizes through sedimentation tank (the bottom of a boiler is concentrated).

The intercommunication pond here is mainly still for and breed the pond intercommunication, breed the sewage that the pond was come and mix in the intercommunication pond, later the sewage in intercommunication pond flows to the sedimentation tank, be used for flowing water exchange, the filth receives the action of gravity to deposit in the sedimentation tank bottom along with rivers lateral flow's in-process, because the sedimentation tank bottom design of this case is back taper or leaks hopper-shaped, ensured that the filth can concentrate and assemble, later through the mode of discharging or taking out, the realization is with the most filth of minimum water yield discharge, thereby the waste of breeding the pond water has been reduced. The design is mainly designed by obtaining inspiration from a toilet stool of the motor train unit.

The water passing hole 61 is plugged by a cannula or a two-way valve at ordinary times, and the cannula is pulled out when water drainage is needed.

In actual design, the bottom of the communication tank 2 may be provided with a slope inclined toward the water through hole 61 (as shown in fig. 7).

In order to control the discharge of the sewage, the water depth, length and water flow speed (water passing area) in the sewage separation tank are very critical,

the design needs to be carried out according to the field situation, and the structure of the dirt separation tank adopts the following two embodiments:

example 1

As shown in fig. 3: the opening of the sewage discharging device is a sewage discharging pipeline 31 which is arranged at the lower concave part and communicated with the outside, and a switch mechanism is arranged on the sewage discharging pipeline 31. The switching mechanism here can be realized with a common cannula or a solenoid valve.

As shown in fig. 5, 6 and 7: actually, when the position of the lower concave part is designed, the position of the lower concave part can be located in the middle of the bottom surface of the sedimentation tank 3, can also be located at a position of the bottom surface of the sedimentation tank 3 close to the side edge, and can also be directly located at a position of the bottom surface close to the included angle if necessary.

Example 2

The sewage draining device is a water draining pipe 32 which extends from the upper part of the sedimentation tank 3 to the lower concave part and is provided with a water pump, and the other end of the water draining pipe 32 extends to the outside. In addition, the siphon principle can be adopted to remove the dirt. Here carry out the blowdown through external introduction pipeline, this design is more fit for the transformation in current breed pond, and the sedimentation tank can't set up sewage pipes 31 in addition promptly, can be directed against the bottom redesign back taper or leak hopper-shaped back, introduces external pipeline and carries out the blowdown. The drain pipe 32 here can be fixed to the bottom surface with its opening facing the lowest point of the inverted cone or funnel. This scheme can be handled on the basis of example 1.

The water return device is a pneumatic water lifting device 41. The pneumatic water lifting device 41 is mainly used for saving electricity and increasing the oxygen content of return water, and the pneumatic water lifting device 41 can refer to the scheme of ZL200920268369.5 or ZL 201922351644.6. The present application is not described in detail.

On the basis of the above embodiment, or considering that a plurality of groups of fences 62 are erected above the communication tank 2, and a plurality of brushes 63 or meshes are arranged at the fences 62. The floating dirt can be effectively prevented from entering the sedimentation tank 3.

Example 3

The culture pond 1 is in a round shape, an oval shape or a rectangular cut angle, and an interception rod 11 extending to the culture pond is arranged at the edge of the culture pond 1; the interception rod 11 is flush with the liquid level of the culture pond.

The return water is mainly considered, the returned culture water impacts the culture water in the culture pond, so that the culture water in the culture pond forms a vortex, on one hand, the dirt at the bottom is convenient to gather, and on the other hand, the floating objects, the excrement and the like on the surface of the culture water flow conveniently. The floating objects are intercepted by adding the intercepting rod, and then the floating objects are gathered in the enclosed space by swinging the intercepting rod. Then the floating objects are removed by fishing, pumping and the like.

Example 4

As shown in fig. 8 and 9: on the basis of embodiment 3, a floating object channel 13 is arranged on the dirt separation pool, the floating object channel 13 is positioned on one side, facing the water flow, of the interception rod 11, and a blocking net and a gate are arranged at an inlet of the floating object channel 13. The culture water is brought to the dirt separation tank with the float by opening the float passage 13. The design of the blocking net can ensure that the cultured animals in the culture pond can not enter.

The floating objects can be salvaged manually. Of course, a timed-open floater discharging pipe 14 may be provided on the sidewall of the sewage separating tank. By opening the discharge of the float sewage pipe 14.

In addition, if necessary, a separate floating object collecting tank 22 may be isolated at a position corresponding to the floating object passage 13 in the floating object discharging pipe 14.

Example 5

As shown in fig. 10-12: on the basis of the embodiments 1-4, the invention also comprises a biochemical pool, wherein the biochemical pool is divided into a plurality of chambers which are arranged in sequence by partition boards, and the chambers comprise at least one biochemical chamber 5 and a water return chamber 7;

an overflow channel 42 is arranged in the water return pool 4 and connected to the biochemical chamber 5, a first overflow channel 51 is arranged at the bottom of the biochemical chamber 5 and connected to the next chamber, and a water return pipeline 71 is arranged in the water return chamber 7 and used for introducing the culture water with the particle dirt removed into the culture pool. A certain water level height is set through the overflow passage 42, so that a certain water level of the return water tank 4 can be automatically ensured

The culture water is further purified by adding the biochemical pond, and the reuse rate of the culture water is improved by adding the nitrifying and denitrifying bacteria, the snails, the silver carp, the scavenger and the like in the biochemical pond for further purification. In addition, the amount of water received in the biochemical pond must be able to accommodate the "overflow" of influent from the culture pond.

The biochemical chamber 5 is internally provided with a purification mechanism which is a plurality of groups of brush holders 52, each brush holder 52 comprises a support rod 521 at the middle part and bristles 522 arranged on the support rod 521, and the side surface of the biochemical chamber 5 is provided with a limit groove for guiding and limiting the support rod 521. The brush holder can facilitate the attachment and the propagation of nitrifying and denitrifying bacteria, algae and snails, and improve the purification efficiency of the unit volume of the biochemical chamber. The brush can be provided with a plurality of groups of colors, and the cleanness of the biochemical chamber can be ensured by periodical replacement or flushing.

The bottom of the biochemical chamber 5 is an inverted V-shaped bottom surface 54 with a high middle part and two low sides, and a sewage discharge outlet 55 is arranged at the lower concave part of the inverted V-shaped bottom surface 54. At present, all biochemical room bottoms all design for the plane, but discover among the in-service use that biochemical room bottom still can assemble more filth (difficult clearance), mainly be biochemical indoor biological metabolite and follow a small amount of excrement that aquaculture water brought, in order to guarantee the cleanliness of biochemical room, the event has carried out above-mentioned design to biochemical room bottom, is favorable to the discharge of filth.

While the invention has been illustrated and described with respect to specific embodiments and alternatives thereof, it will be understood that various changes and modifications can be made without departing from the spirit and scope of the invention. It is understood, therefore, that the invention is not to be in any way limited except by the appended claims and their equivalents.

Claims

1. Internal loop farming systems, its characterized in that:

the device comprises a culture pond (1) and a dirt separation pond communicated with the culture pond (1);

a water return device is also arranged in the sewage separation tank.

2. The internal circulation farming system of claim 1, wherein: the sewage separation tank is divided into three communicating tanks (2), a sedimentation tank (3) and a water return tank (4) which are arranged in sequence through two partition plates (6),

the communicating tank (2) is communicated with the bottom of the culture tank (1) through a communicating pipe (21), so that sewage at the bottom of the culture tank (1) flows into the communicating tank (2);

a water return device is arranged in the water return tank (4), and the culture water from which the particle dirt is removed in the water return tank (4) is discharged into the water return device of the culture tank (1).

3. The internal circulation farming system of claim 2, wherein: the lower concave part is positioned on the bottom surface of the sedimentation tank (3); the bottom of the clapboard (6) is provided with a water through hole (61) with a switch.

4. The internal circulation farming system of claim 1, wherein: the opening of the sewage discharge device is a sewage discharge pipeline (31) which is arranged at the lower concave part and communicated with the outside, and a switch mechanism is arranged on the sewage discharge pipeline (31)

Or the sewage discharge device is a drain pipe (32) which extends from the upper part of the sedimentation tank (3) to the lower concave part and is provided with a water pump, and the other end of the drain pipe (32) extends to the outside.

5. The internal circulation farming system of claim 1, wherein: a plurality of groups of fences (62) are erected above the communicating tank (2), and a plurality of brushes (63) or meshes are arranged at the fences (62).

6. The internal circulation farming system of claim 1, wherein: the culture pond (1) is in a round shape, an oval shape or a rectangular corner cut, and an interception rod (11) extending to the culture pond is arranged at the edge of the culture pond (1); the swing rod (11) is flush with the liquid level of the culture pond.

7. The internal circulation farming system of claim 5, wherein: a floating object channel (13) is formed in the dirt separation pool, the floating object channel (13) is located on one side, facing water flow, of the intercepting rod (11), and a blocking net and a gate are arranged at an inlet of the floating object channel (13).

8. The recirculating aquaculture system of any one of claims 1-7 wherein: the biochemical device also comprises a biochemical pool, wherein the biochemical pool is divided into a plurality of chambers which are arranged in sequence through partition plates, and each chamber comprises at least one biochemical chamber (5) and a water return chamber (7);

an overflow channel (42) is arranged in the water return pool (4) and connected to the biochemical chamber (5), a first overflow channel (51) is arranged at the bottom of the biochemical chamber (5) and connected to the next chamber, and a water return pipeline (71) is arranged in the water return chamber (7) and used for introducing the culture water with the particle dirt removed into the culture pool.

9. The recirculating aquaculture system of claim 8 wherein: the biochemical chamber (5) is internally provided with a purification mechanism which is a plurality of groups of brush holders (52), each brush holder (52) comprises a support rod (521) at the middle part and brush hairs (522) arranged on the support rod (521), and the side surface of the biochemical chamber (5) is provided with a limit groove for guiding and limiting the support rod (521).

10. The recirculating aquaculture system of claim 8 wherein: the bottom of the biochemical chamber (5) is an inverted V-shaped bottom surface (54) with a high middle part and two low sides, and a sewage outlet (55) is arranged at the lower concave part of the inverted V-shaped bottom surface (54).