A circulating water filter device for yellow catfish fry ponds

Abstract

The utility model discloses a kind of yellow catfish fry seed pool circulating water filtering devices, belong to aquaculture equipment technical field. Including square box, inside is equipped with liquid inlet, sedimentation, filter three tanks;Liquid inlet tank top is equipped with cyclone separator, partition is equipped with one-stage filter screen, bottom is equipped with blow-off pipe;Sedimentation tank is communicated with filter tank by water suction pump, filter tank is built-in pullable permeation filter component, contain two-stage filter screen, V-shaped deflector, permeation membrane, activated carbon and throttling component. Device is purified through cyclone separation, sedimentation and multistage filtration cooperation, solve the problem that the filter level of existing device is few, maintenance is difficult, flow field is uneven, realize efficient solid waste interception, organic matter adsorption and microorganism interception, guarantee fry seed pool water quality stability, improve breeding benefit.

Description

Technical Field

[0001] This utility model relates to the field of aquaculture equipment technology, and in particular to a circulating water filtration device for yellow catfish fry ponds. Background Technology

[0002] As aquaculture develops towards intensification and ecological practices, the requirements for water quality in the cultivation of yellow catfish fry are becoming increasingly stringent. Yellow catfish are fragile at the fry stage and are extremely sensitive to fluctuations in water quality (such as suspended solids concentration, dissolved organic matter, and microbial content). Deteriorating water quality easily leads to diseases such as gill rot and enteritis, significantly reducing survival rates. Therefore, the circulating water filtration system, as a core supporting facility for fry ponds, must have the functions of efficiently removing solid waste, degrading organic matter, and stabilizing water quality.

[0003] Currently, existing filtration devices for circulating water in seedling ponds suffer from the following shortcomings: First, a single filtration stage is insufficient to handle complex water quality. Traditional devices rely heavily on physical filtration (such as sieves) or simple sedimentation, which has limited ability to remove colloidal particles, microorganisms, and dissolved pollutants, making it difficult to meet the high requirements of yellow catfish seedlings for their micro-ecological environment. Second, maintenance is inconvenient. Some devices use fixed filtration structures, requiring shutdown for disassembly and cleaning after impurities are intercepted, affecting the continuity of aquaculture; moreover, the filter components are prone to clogging after long-term operation, reducing treatment efficiency. Third, flow field control is unreasonable. Uneven water flow distribution can easily lead to local short-circuiting, with some areas experiencing excessive filtration load, shortening component lifespan; simultaneously, the circulating water volume is mismatched with the seedling pond volume, making efficient water exchange impossible. Fourth, there is a high dependence on chemical agents. To compensate for the inadequacy of physical filtration, some devices require the addition of flocculants or disinfectants, which can easily cause secondary pollution and threaten the health of the seedlings.

[0004] Therefore, there is an urgent need to develop a multi-stage, synergistic, easy-to-maintain, and low-pollution circulating water filtration device for yellow catfish fry ponds to address the shortcomings of existing technologies. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a circulating water filtration device for yellow catfish fry ponds.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: This utility model discloses a circulating water filtration device for yellow catfish fry ponds, comprising a square box arranged sequentially along the water flow direction. The box is internally divided into three functional areas by a partition: an inlet tank, a sedimentation tank, and a filtration tank. A cyclone separator is fixedly installed on the top of the inlet tank, with its inlet side connected to the drain outlet of the yellow catfish fry pond, and its outlet side extending downwards to the top opening of the inlet tank. A removable primary filter screen is provided on the partition between the inlet tank and the sedimentation tank. Both the inlet tank and the sedimentation tank have drain pipes with electric butterfly valves on their bottom sides. A water outlet valve is provided on the lower side of the filtration tank. A water pump is fixedly installed on the outside of the box, with its inlet end connected to the top of the sedimentation tank via a pumping pipe, and its outlet end connected to the top of the filtration tank via a drain pipe. A flow valve is provided on the drain pipe. A permeation filtration assembly is installed inside the filtration tank, and this assembly can be pulled out and installed on the inner wall of the filtration tank via a lifting handle.

[0007] As a preferred embodiment of this utility model, the permeation filtration assembly includes a fixed bracket, a secondary filter screen, a V-shaped guide plate, a permeation membrane assembly, an activated carbon filter assembly, and a throttling assembly; the fixed bracket is fixed to the inner wall of the filter tank, and the secondary filter screen, the V-shaped guide plate, the permeation membrane assembly, the activated carbon filter assembly, and the throttling assembly are stacked and fixed in sequence from top to bottom inside the fixed bracket.

[0008] As a preferred embodiment of this utility model, the permeation membrane assembly includes a detachable filter membrane, an upper fixing plate for the filter membrane, and a lower fixing plate for the filter membrane; the upper fixing plate and the lower fixing plate for the filter membrane are made of stainless steel and are horizontally arranged; the detachable filter membrane is a polypropylene microporous membrane, and its edges are detachably connected to the slots of the upper fixing plate for the filter membrane and the lower fixing plate for the filter membrane by buckles.

[0009] As a preferred embodiment of the present invention, the activated carbon filter assembly includes a cylindrical hollow mesh filter cylinder and granular coconut shell carbon filled inside it, and the filter cylinder is vertically fixed in a fixed support.

[0010] As a preferred technical solution of this utility model, the throttling component includes a horizontally arranged throttling plate and a throttling filter membrane laid at its bottom; the throttling plate is located below the activated carbon filter component, and circular throttling orifices are uniformly opened on it; the throttling filter membrane is a fine polyester fiber filter membrane.

[0011] As a preferred technical solution of this utility model, the V-shaped guide plate is formed by stamping a thin stainless steel plate, and its top end is connected to the bottom of the secondary filter screen. It is used to evenly disperse the water flow to the surface of the permeate membrane module and avoid local short-circuiting.

[0012] As a preferred technical solution of this utility model, the water pump is a self-priming centrifugal pump, whose power is matched with the water circulation volume of the yellow catfish fry pond, ensuring that the hourly circulation volume is 3 to 5 times the total volume of the fry pond.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. Multi-stage synergistic filtration for high purification efficiency: The device adopts a three-stage treatment process of "cyclone separation → sedimentation → precision filtration". The cyclone separator initially intercepts large particles of uneaten food and fish feces, the first-stage filter further removes suspended solids, and the sedimentation tank allows fine particles to settle. Finally, through the combination of permeation membrane, activated carbon and throttling components, the deep removal of colloids, organic matter, microorganisms and extremely fine particles is achieved. 2. Modular and maintainable design to reduce operation and maintenance costs: The permeation filtration components can be pulled out and installed by lifting the handle, and core components such as the secondary filter, permeation membrane, and activated carbon can be quickly disassembled and replaced; the primary filter and cyclone separator are also detachable structures, and impurities can be cleaned without shutting down the entire machine, which greatly shortens maintenance time and ensures the continuity of aquaculture. 3. Uniform and controllable flow field, avoiding local blockage: The V-shaped guide plate evenly disperses the water flow to the surface of the permeate membrane, eliminating local short-circuiting and extending the service life of the filter membrane; the power of the water pump is precisely matched with the circulation volume of the seedling pond, the flow valve adjusts the flow rate, and the throttling component controls the final effluent flow rate, ensuring balanced load in each functional area and improving system stability; 4. No chemical additives, eco-friendly: Through the synergistic effect of physical filtration (membrane separation, activated carbon adsorption) and natural sedimentation, there is no need to add chemical agents, avoiding secondary pollution. This meets the green water quality requirements of yellow catfish fry and helps maintain the micro-ecological balance of the fry pond. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is the front view of this utility model; Figure 3 This is a top view of the present invention; Figure 4 This is a cross-sectional structural schematic diagram of the present invention; Figure 5 This is a schematic diagram of the structure of the permeation filtration component in this utility model; In the diagram: 1. Housing; 2. Cyclone separator; 3. Primary filter screen; 4. Water pump; 5. Permeate filtration assembly; 6. Drain pipe; 7. Outlet valve; 11. Inlet tank; 12. Sedimentation tank; 13. Filter tank; 21. Inlet side; 22. Outlet side; 41. Pumping pipe; 42. Drain pipe; 43. Flow valve; 51. Fixed bracket; 52. Secondary filter screen; 53. V-shaped guide plate; 54. Permeate membrane assembly; 55. Activated carbon filter assembly; 56. Throttling assembly; 57. Lifting handle; 61. Electric butterfly valve; 541. Removable filter membrane; 542. Upper fixing plate for filter membrane; 543. Lower fixing plate for filter membrane; 551. Filter cylinder; 552. Coconut shell charcoal; 561. Throttling plate; 562. Throttling filter membrane. Detailed Implementation

[0015] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0016] In the attached diagram, all identical reference numerals refer to the same components.

[0017] Example 1 like Figure 1-5 As shown in the figure, this embodiment provides a circulating water filtration device for yellow catfish fry ponds. The overall structure is as follows: the main body of the device is a square box 1, and the interior is divided into an inlet tank 11, a sedimentation tank 12 and a filtration tank 13 arranged in sequence along the water flow direction by vertical partitions.

[0018] A cyclone separator 2 is fixedly installed on the top of the inlet tank 11. Its inlet side 21 is sealed to the drain outlet of the external yellow catfish fry pond via a pipe, while its outlet side 22 extends downwards to above the top opening of the inlet tank 11, allowing the wastewater separated by the cyclone to flow into the inlet tank 11 by gravity. A removable primary filter screen 3 is embedded in the horizontal partition between the inlet tank 11 and the sedimentation tank 12 to intercept larger suspended solids such as broken bait and fish scales that remain after the cyclone separation. Both the bottom sides of the inlet tank 11 and the sedimentation tank 12 are fixedly connected to a drain pipe 6 with an electric butterfly valve 61, which can be opened periodically to discharge the silt and impurities deposited at the bottom of the tank.

[0019] The main function of the sedimentation tank 12 is to allow sedimentation. Its top is sealed to the inlet of the water pump 4 through the water pump pipe 41. The water pump 4 is a self-priming centrifugal pump. Its outlet is connected to the top of the filter tank 13 through the drain pipe 42. A flow valve 43 is installed on the drain pipe 42 to regulate the water flow rate into the filter tank 13.

[0020] The inner wall of the filter tank 13 is equipped with a removable permeation filtration assembly 5 via a sliding rail, and the top of the assembly has a lifting handle 57 for easy removal and maintenance. Inside the permeation filtration assembly 5, from top to bottom, are a fixed bracket 51, a secondary filter screen 52, a V-shaped guide plate 53, a permeation membrane assembly 54, an activated carbon filter assembly 55, and a throttling assembly 56.

[0021] Please see Figure 4 , Figure 5 The fixed bracket 51 is a stainless steel frame structure that slides against the inner wall of the filter tank 13; the secondary filter screen 52 is a fine nylon mesh that intercepts small particles that pass through the primary filter screen 3; the V-shaped guide plate 53 is formed by stamping a thin stainless steel sheet, with its top end connected to the bottom of the secondary filter screen 52, evenly distributing the water flow to the surface of the permeate membrane assembly 54 below, avoiding local short-circuiting; the permeate membrane assembly 54 includes a removable filter membrane 541 made of polypropylene microporous membrane material, the edges of which are fastened to the upper and lower layers of stainless steel... The upper fixing plate 542 and the lower fixing plate 543 of the filter membrane are detachably connected and used to intercept colloids and microorganisms; the activated carbon filter assembly 55 is a vertically fixed cylindrical hollow mesh filter cylinder 551, which is filled with granular coconut shell carbon 552 to adsorb dissolved organic matter and odors; the throttling assembly 56 includes a horizontal throttling plate 561 and a fine polyester fiber filter membrane 562 laid at the bottom. The throttling plate 561 has a circular throttling orifice to control the final water flow rate, and the throttling filter membrane 562 intercepts extremely fine particles.

[0022] A water outlet valve 7 is provided on the lower side of the filter tank 13, through which the purified water flows back to the seedling pond, forming a closed loop.

[0023] Example 2 This embodiment, based on Embodiment 1, focuses on optimizing the functional synergy of the permeation filtration components: The removable filter membrane 541 of the permeate membrane module 54 is made of polypropylene with a pore size controlled between 0.1 and 0.5 micrometers, which can efficiently trap bacteria and colloidal particles. The upper fixing plate 542 and the lower fixing plate 543 of the filter membrane are locked to the fixing bracket 51 with bolts, which facilitates the periodic replacement of the filter membrane. The filter cylinder 551 of the activated carbon filter module 55 is made of 304 stainless steel mesh with a porosity of ≥60%, which ensures that the water flow penetrates the coconut shell carbon 552 layer evenly and improves the adsorption efficiency. The throttling plate 561 of the flow-throttling module 56 has a throttling orifice diameter that matches the required circulation flow rate of the seedling pond. With the help of the flow valve 43, the total circulation water volume is three to five times the total volume of the seedling pond per hour, ensuring the efficiency of water quality renewal.

[0024] Example 3 This embodiment emphasizes the ease of maintenance of the device: The primary filter screen 3 is connected to the partition between the inlet tank 11 and the sedimentation tank 12 via clips. Disassembly is simple; just press the clips to remove it. After cleaning away any trapped suspended solids, it can be quickly reset. The permeation filtration assembly 5 is pulled out along the inner wall of the filter tank 13 via the lifting handle 57. The secondary filter screen 52, the V-shaped guide plate 53, and each layer of filter assembly can be individually disassembled for cleaning or replacement. The drain pipe 6 at the bottom of the sedimentation tank 12 and the inlet tank 11 has an electric butterfly valve 61 that is linked to a time relay. It opens for ten minutes daily to discharge settled sludge, preventing impurities from accumulating and affecting system operation.

[0025] This device achieves efficient purification of water in yellow catfish fry ponds through the synergistic effect of a multi-stage filtration structure. Furthermore, each component can be quickly disassembled and maintained, solving the problems of limited filtration stages and difficult maintenance in traditional devices, thus ensuring stable water quality in the fry ponds.

[0026] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A circulating water filtration device for yellow catfish fry ponds, characterized in that, The system includes a square box (1) arranged sequentially along the water flow direction. The interior of the box (1) is divided into three functional areas by a partition: an inlet tank (11), a sedimentation tank (12), and a filter tank (13). A cyclone separator (2) is fixedly installed on the top of the inlet tank (11). The inlet side (21) of the cyclone separator (2) is connected to the drain outlet of the yellow catfish fry pond, and the outlet side (22) extends downwards to the top opening of the inlet tank (11). A removable primary filter screen (3) is provided on the partition between the inlet tank (11) and the sedimentation tank (12). The bottom of the inlet tank (11) and the sedimentation tank (12) are... Each side of the filter tank (13) is equipped with a drain pipe (6) with an electric butterfly valve (61); the lower side of the filter tank (13) is equipped with a water outlet valve (7); a water pump (4) is fixedly installed on the outside of the box (1); the inlet end of the water pump (4) is connected to the top of the sedimentation tank (12) through a water pump pipe (41), and the outlet end is connected to the top of the filter tank (13) through a drain pipe (42); a flow valve (43) is provided on the drain pipe (42); a permeation filtration assembly (5) is provided inside the filter tank (13); the permeation filtration assembly (5) can be pulled out and installed on the inner wall of the filter tank (13) through a lifting handle (57).

2. The circulating water filtration device for yellow catfish fry ponds according to claim 1, characterized in that, The permeation filtration assembly (5) includes a fixed bracket (51), a secondary filter screen (52), a V-shaped guide plate (53), a permeation membrane assembly (54), an activated carbon filter assembly (55), and a throttling assembly (56); the fixed bracket (51) is fixed to the inner wall of the filter tank (13), and the secondary filter screen (52), the V-shaped guide plate (53), the permeation membrane assembly (54), the activated carbon filter assembly (55), and the throttling assembly (56) are stacked and fixed in sequence from top to bottom inside the fixed bracket (51).

3. The circulating water filtration device for yellow catfish fry ponds according to claim 2, characterized in that, The permeation membrane assembly (54) includes a detachable filter membrane (541), an upper filter membrane fixing plate (542), and a lower filter membrane fixing plate (543). The upper filter membrane fixing plate (542) and the lower filter membrane fixing plate (543) are made of stainless steel and are horizontally arranged. The detachable filter membrane (541) is a polypropylene microporous membrane, and its edge is detachably connected to the grooves of the upper filter membrane fixing plate (542) and the lower filter membrane fixing plate (543) by a buckle.

4. The circulating water filtration device for yellow catfish fry ponds according to claim 2, characterized in that, The activated carbon filter assembly (55) includes a cylindrical perforated mesh filter cylinder (551) and granular coconut shell charcoal (552) filled inside it. The filter cylinder (551) is vertically fixed inside the fixed bracket (51).

5. A circulating water filtration device for a yellow catfish fry pond according to claim 2, characterized in that, The throttling component (56) includes a horizontally arranged throttling plate (561) and a throttling filter membrane (562) laid at its bottom; the throttling plate (561) is located below the activated carbon filter component (55) and has a circular throttling port evenly opened on it; the throttling filter membrane (562) is a fine polyester fiber filter membrane.

6. The circulating water filtration device for yellow catfish fry ponds according to claim 2, characterized in that, The V-shaped guide plate (53) is formed by stamping a thin stainless steel plate. Its top end is connected to the bottom of the secondary filter screen (52) to evenly disperse the water flow to the surface of the permeate membrane module (54) and avoid local short-circuiting.

7. The circulating water filtration device for yellow catfish fry ponds according to claim 1, characterized in that, The water pump (4) is a self-priming centrifugal pump, whose power is matched with the water circulation volume of the yellow catfish fry pond, ensuring that the hourly circulation volume is 3 to 5 times the total volume of the fry pond.

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