CN203373190U

CN203373190U - Biological filter device for aquaculture

Info

Publication number: CN203373190U
Application number: CN201320228113.8U
Authority: CN
Inventors: 王婷
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-04-25
Filing date: 2013-04-25
Publication date: 2014-01-01
Anticipated expiration: 2023-04-25

Abstract

The utility model discloses a biological filter device for aquaculture. The biological filter device comprises a filtering tank body, wherein the filtering tank body is internally provided with a gas, liquid and solid three-phase backwashing mechanism composed of a circulating pump, a jet device, a vertical type peripheral backwashing pipe and a filtering floating ball. The biological filter device is characterized in that a floating type sewage discharge mechanism composed of an upper bracket, a lower filtering net floating ball, a connection rod, a lower filtering net, a lower bracket and a filtering tank bottom is further arranged below the gas, liquid and solid three-phase backwashing mechanism. According to the biological filter device for the aquaculture, a gas, liquid and solid three-phase flowing manner is adopted for carrying out a backwashing design; under the state that liquid flows of a gas phase, a liquid phase and a solid phase are boiled, stuck substances and old biological films stuck on the surfaces of filtering materials are removed by mutual friction and extrusion of the filtering materials and a biological film on a carrier has high activity; the biological filter device for the aquaculture has a good backwashing effect, the movements of the sewage discharge mechanism are accurate and sewage discharge is smooth; the biological filter device for the aquaculture is simple in structure and is easy to manufacture.

Description

Used for aquiculture biological filter device

Technical field

The utility model relates to a kind of aquaculture equipment, is specifically related to a kind of used for aquiculture biological filter device.

Background technology

The circulating water culture system of Modern Fishery demand for development is compared with traditional pond culture method, and cultivation density has improved 30～50 times.In circulating water culture system, high-density breeding means that the movement of cultured fishes increases, and has correspondingly increased the load of water treating equipment in the system.Water treatment in circulating water cultivation mainly comprises the treating processess such as oxygenation, separation (separating solid substances and suspended substance), biofiltration (absorbing decomposition ammonia nitrogen and nitrite, reduction BOD), aeration (removing carbonic acid gas etc.) and disinfection, and wherein suspended substance and ammonia nitrogen removal are technical difficult points.Biological filter, as the major equipment of biological treatment ammonia nitrogen, is the emphasis of research always.The ball float bio-carrier carrier surface forming biofilm property of float-ball type biological filter is good, the biofilm time is short, microbial film is in stable condition, can filter 97% the following suspended substance of 30um, and application better.But, because the density of suspended filter material is less, be subject to the extruding of larger buoyancy in water, often produce the phenomenon that hardens, and between the microbial film of filter material surface death and filtrate, have impurity to pile up, reduced the nitrification ability of biological filter and the efficiency of filtering suspended particle.For the obstruction that prevents biological filter with reduce the resistance of current, the ball float biological filter needs back flushing frequently, and recoil frequency height has not only been wasted water source, and has limited the size of filter screen mesh at the bottom of tank and the design of ball float size.

The utility model content

The purpose of this utility model is to provide a kind of used for aquiculture biological filter device of new texture, and not only backwash effect action good, pollution discharge mechanism is accurate, blowdown is unimpeded for it, and simple in structure, is easy to manufacture, thereby addresses the above problem.

For realizing this purpose, the technical solution of the utility model is: a kind of used for aquiculture biological filter device, comprise a filtration tank body, described filtration tank body is built-in with by recycle pump, ejector, the gas that vertical circumferential recoil tube and filtration ball float form, liquid, Gu three-phase recoil mechanism, described gas, liquid, Gu three-phase recoil mechanism below also is provided with one by upper bracket, lower filtering net ball float, connecting rod, lower filtering net, the floating type pollution discharge mechanism that lower bracket and hay tank bottom form, described lower filtering net ball float is connected by the blowdown connecting rod with lower filtering net, described lower bracket is located at lower filtering net below, described lower filtering net below also is provided with sewage sump.

As preferably, described recycle pump is electrically connected with recoil magnetic valve, blowoff electromagnetic valve, entering water electromagnetic valve, and during device work, recoil magnetic valve, blowoff electromagnetic valve are closed, and entering water electromagnetic valve is opened, and recycle pump supplies water to strainer by horizontal jet pipe.

As preferably, described filtration tank body is tapered, and described taper hay tank middle and upper part is provided with the double filtration layer, the spherical filtrate of small-particle that described double filtration layer upper strata is particle diameter 1.5-2.5mm, the large granular spherical filtrate that lower floor is particle diameter 5mm.

Compared with prior art, the utility model adopts the mode of gas, liquid, solid three phase flow to carry out the back flushing design, at gas, liquid, solid three-phase liquid stream, be under boiling state, examine, push removal by the phase attrition between filtrate and be bonded in the coherent substance of filter material surface and old microbial film, keep microbial film on carrier to there is greater activity.Strainer adopts the float-ball type filtrate, and proportion is little, specific surface area is large, and the biomembrane area that makes to process ammonia nitrogen is large, has improved the filtration efficiency of unit weight filtrate, has improved the performance of biological filter; Simultaneously, the increase of specific surface area has also increased the area of absorption suspended particle, has improved filtration efficiency; Two filtering layers filter respectively the particle of different sizes, have improved filter effect.The suspended substance filtration efficiency has reached 90%, and the largest particle diameter is reduced to 19um.

The accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Wherein: 1: filter tank body; 2: upper locating support; 3: lower filtering net ball float; 4: large ball float; 5: small floating ball; 6: upper filtering net; 7: vertical circumferential recoil tube; 8: the spray tube of laterally intaking; 9: the pollution discharge mechanism connecting rod; 10: lower filtering net; 11: lower locating support; 12: sewage sump.

Embodiment

The utility model is further illustrated with reference to the accompanying drawings in conjunction with the embodiments.

As shown in Figure 1, a kind of used for aquiculture biological filter device, comprise a filtration tank body, described filtration tank body is built-in with by recycle pump, ejector, vertical circumferential recoil tube and filters the gas, liquid, solid three-phase recoil mechanism that ball float forms, and described gas, liquid, solid three-phase recoil mechanism below also is provided with a floating type pollution discharge mechanism consisted of upper bracket, lower filtering net ball float, connecting rod, lower filtering net, lower bracket and hay tank bottom.Wherein, described lower filtering net ball float is connected by the blowdown connecting rod with lower filtering net, and described lower bracket is located at lower filtering net below, and described lower filtering net below also is provided with sewage sump.Described recycle pump is electrically connected with recoil magnetic valve, blowoff electromagnetic valve, entering water electromagnetic valve, and during device work, recoil magnetic valve, blowoff electromagnetic valve are closed, and entering water electromagnetic valve is opened, and recycle pump supplies water to strainer by horizontal jet pipe.Described filtration tank body is tapered, and described taper hay tank middle and upper part is provided with the double filtration layer, the spherical filtrate of small-particle that described double filtration layer upper strata is particle diameter 1.5-2.5mm, the large granular spherical filtrate that lower floor is particle diameter 5mm.

The improvement that the utility model carries out mainly for the biological filter apparatus structure, the foregoing is only the utility model preferred embodiment, non-so limit to the scope of the claims of the present utility model, therefore simple and easy variation and the equivalent transformation of such as doing by the utility model specification sheets and graphic content, all should be contained in the scope of the claims of the present utility model.

Claims

1. a used for aquiculture biological filter device, comprise a filtration tank body, described filtration tank body is built-in with by recycle pump, ejector, the gas that vertical circumferential recoil tube and filtration ball float form, liquid, Gu three-phase recoil mechanism, it is characterized in that, described gas, liquid, Gu three-phase recoil mechanism below also is provided with one by upper bracket, lower filtering net ball float, connecting rod, lower filtering net, the floating type pollution discharge mechanism that lower bracket and hay tank bottom form, described lower filtering net ball float is connected by the blowdown connecting rod with lower filtering net, described lower bracket is located at lower filtering net below, described lower filtering net below also is provided with sewage sump.

2. used for aquiculture biological filter device according to claim 1, it is characterized in that: described recycle pump is electrically connected with recoil magnetic valve, blowoff electromagnetic valve, entering water electromagnetic valve, during device work, recoil magnetic valve, blowoff electromagnetic valve are closed, entering water electromagnetic valve is opened, and recycle pump supplies water to strainer by horizontal jet pipe.

3. used for aquiculture biological filter device according to claim 1, it is characterized in that: described filtration tank body is tapered, described taper hay tank middle and upper part is provided with the double filtration layer, the spherical filtrate of small-particle that described double filtration layer upper strata is particle diameter 1.5-2.5mm, the large granular spherical filtrate that lower floor is particle diameter 5mm.