Factory circulating water fish culture system

Abstract

The utility model discloses a factory-like circulating water fish culture system which comprises an artificial culture container, a settling pond, a first filter, a photocatalytic degradation device, a biochemical pond and a second filter which are sequentially connected, and a water outlet of the second filter is communicated with a water inlet of the artificial culture container. The photocatalytic degradation device comprises a tank body, a lower-layer filter plate, an upper-layer filter plate, a transparent tube group, an ultraviolet lamp tube and a transparent filler. The lower-layer filter plate is horizontally fixed in an inner cavity of the tank body, the upper-layer filter plate is positioned above the lower-layer filter plate, a transparent tube group is arranged between the lower-layer filter plate and the upper-layer filter plate, and the ultraviolet lamp tube is sealed in the transparent tube group. The spherical transparent filler is filled in a space between the lower-layer filter plate and the upper-layer filter plate, and a titanium dioxide photocatalyst is loaded on the surface of the transparent filler. The culture system can accelerate the removal efficiency of organic matters in culture circulating water, so that the treatment rate of a microbial purification link is accelerated, and the treatment process of the whole circulating water is accelerated.

Description

TECHNICAL FIELD

[0001] The utility model relates to fish culture technical field, concretely relates to a kind of factory circulating water fish culture system. BACKGROUND

[0002] Factory circulating water culture is a modern highly intensive culture mode, simulates natural ecological environment in artificial culture container through technical means, to realize high-density, high efficiency and low environmental impact aquaculture mode, is praised as "the most potential culture mode in the twenty-first century", it is the important direction of low-carbon, green development of our aquaculture.This culture mode has the advantages of less water consumption, and water can be recycled, thereby can save water resources, and also has the advantages of less land occupation, short growth cycle etc.

[0003] In order to realize the recycling of culture water, culture water is usually filtered, microorganism purified, sterilized and disinfected, oxygenated and then returned to artificial culture container.The organic matter, nitrogen content and the like of culture water are reduced in the traditional factory circulating water culture system mainly through the above-mentioned microorganism purification means, but the removal rate of organic matter is slow, the efficiency is low, the treatment process of culture water is affected, and the imbalance between the water discharged from artificial culture container and the treated water supplied is caused. SUMMARY

[0004] In view of the above problems, the utility model provides a kind of factory circulating water fish culture system, which can speed up the removal efficiency of organic matter in culture circulating water, speed up the treatment rate of microorganism purification link, and further speed up the treatment process of entire circulating water.Specifically, the technical scheme of the utility model is as follows.

[0005] A kind of factory circulating water fish culture system, including artificial culture container, sedimentation tank, first filter, photocatalytic degrader, biochemical tank, second filter connected in sequence, and the water outlet of the second filter is communicated with the water inlet of the artificial culture container.The photocatalytic degrader includes tank body, lower filter plate, upper filter plate, transparent tube group, ultraviolet lamp tube and transparent filler.The lower part and upper part of the tank body have import and export respectively, which are communicated with the first filter, biochemical tank respectively.The lower filter plate is fixed horizontally in the inner cavity of tank body, the upper filter plate is located above the lower filter plate, and there is at least one layer of the transparent tube group arranged horizontally between the lower filter plate and the upper filter plate, and each layer of the transparent tube group is composed of several transparent tubes distributed at intervals.The ultraviolet lamp tube is enclosed in the transparent tube group.The transparent filler in the form of ball is filled in the space between the lower filter plate and the upper filter plate, and the surface of the transparent filler is loaded with titanium dioxide photocatalyst.

[0006] Further, the lower filter plate is laid on a supporting rod, and both ends of the supporting rod are fixedly connected to the inner side wall of the tank body.

[0007] Further, the titanium dioxide photocatalyst has visible light response capability, and part of the transparent tube is provided with a visible light lamp tube or the transparent tube is provided with both the ultraviolet lamp tube and the visible light lamp tube.

[0008] Further, both ends of the transparent tube are located in the pipe inserted into the side wall of the tank body, and are sealingly connected. The lead wire of the ultraviolet lamp tube is located outside the tank body after passing through the end of the transparent tube. Preferably, a sealing sleeve is arranged between the transparent tube group and the pipe inserted.

[0009] Further, the side wall of the tank body between the lower filter plate and the upper filter plate is provided with a light reflecting layer.

[0010] Further, a flushing nozzle is arranged below the lower filter plate, and the nozzle is connected to a clean water source through a water pump to clean the lower filter plate.

[0011] Further, the material of the transparent tube group and the transparent filler includes any one of plastic, organic glass and the like, so that the ultraviolet light passes through.

[0012] Further, the top of the tank body is provided with an exhaust port to discharge carbon dioxide and other gases generated in the photocatalytic degradation process.

[0013] Further, an oxygen cone is further included, and the water outlet of the second filter, the oxygen cone and the water inlet of the artificial breeding container are sequentially communicated.

[0014] Compared with the prior art, the factory circulating water fish breeding system has the following beneficial technical effects:

[0015] The factory circulating water fish breeding system is provided with a photocatalytic degrader before a biochemical tank, and the photocatalytic degrader is provided with transparent fillers loaded with titanium dioxide photocatalysts and transparent tubes encapsulating ultraviolet lamp tubes, so that when the circulating water passes through the fillers from below the transparent filler layer, the organic matters in the water are degraded into small molecular substances and finally into carbon dioxide and water under the photocatalytic action of the titanium dioxide and the ultraviolet light. In addition, the ultraviolet light also plays a role of disinfection and sterilization, so that a separate disinfection device is not needed. After the photocatalytic degradation, the concentration of the organic matters in the circulating water is greatly reduced, so that when the water enters the subsequent biochemical tank, the load of the microorganisms in the tank can be effectively reduced, the treatment of the circulating water is accelerated, the treatment rate of the microorganism purification link is accelerated, the treatment process of the entire circulating water is accelerated, the balance between the water discharged from the artificial breeding container and the treated water to be supplied is better maintained, and the breeding efficiency of the breeding system is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments.

[0017] Figure 1 It is a structure schematic diagram of the factory-like circulating water fish farming system in the following embodiments.

[0018] Figure 2 It is an internal structure schematic diagram of the photocatalytic degrader in the following embodiments.

[0019] Figure 3 It is a top view of the photocatalytic degrader in the following embodiments.

[0020] Figure 4 It is a bottom view of the photocatalytic degrader in the following embodiments.

[0021] Figure 5 It is a partial structure schematic diagram of the transparent tube and the tank body in the following embodiments.

[0022] Figure 6 It is a connection schematic diagram of the transparent tube and the insertion tube in the following embodiments.

[0023] The marks in the above drawings represent respectively: 1-artificial breeding container, 2-settling tank, 3-first filter, 4-photocatalytic degrader, 5-biochemical tank, 6-second filter, 7-water pump, 8-oxygen cone, 4.1-tank body, 4.2-lower filter plate, 4.3-upper filter plate, 4.4-transparent tube group, 4.5-ultraviolet lamp tube, 4.6-transparent filler, 4.7-inlet, 4.8-outlet, 4.9-supporting rod, 4.10-insertion tube, 4.11-wire, 4.12-sealing sleeve, 4.13-exhaust port. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiments of the present application will be described clearly and completely in the following by combining the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. In order to facilitate the description, if the words of "up", "down", "left" and "right" appear in the present application, they only mean the same direction as the up, down, left and right of the drawings, and do not limit the structure, but only facilitate the description of the present application and simplify the description, and therefore cannot be understood as a limitation on the present application. The present application is further described by combining the drawings in the description and the specific embodiments.

[0025] REFERENCE Figure 1An example of a factory-scale recirculating aquaculture system for fish farming is provided, which mainly includes an artificial culture container 1, a sedimentation tank 2, a first filter 3, a photocatalytic degradation device 4, a biological treatment tank 5, and a second filter 6 connected in sequence. The outlet of the second filter 6 is connected to the inlet of the artificial culture container 1, thereby forming a circulating system for the culture water. These devices are connected by pipelines, and water pumps 7 are installed on these pipelines to drive the flow of water and transport it from one device to the next.

[0026] refer to Figures 2-4 The photocatalytic degradation device 4 includes: a tank 4.1, a lower filter plate 4.2, an upper filter plate 4.3, a transparent tube assembly 4.4, an ultraviolet lamp 4.5, and transparent packing material 4.6. The tank 4.1 is vertically oriented, with an inlet 4.7 and an outlet 4.8 on its lower and upper side walls, respectively. Circulating water from the first filter 3 enters the tank 4.1 through the inlet 4.7, flows upwards, and overflows from the outlet 4.8 after treatment. A drain outlet can also be provided at the bottom of the tank 4.1 to periodically or irregularly discharge solid impurities deposited at the bottom of the tank 4.1. The inlet 4.7 is connected to the outlet of the first filter 3, and the outlet 4.8 is connected to the inlet of the biological treatment tank 5.

[0027] A supporting connecting plate is fixed to the inner wall of the tank 4.1 by welding or other methods. The edge of the lower filter plate 4.2 is supported and fixedly connected to this supporting connecting plate. The upper filter plate 4.3 is located above the lower filter plate 4.2, and the edge of the upper filter plate 4.3 is fixedly connected to a limiting plate, which is fixed to the inner wall of the tank 4.1 by welding or other methods. Two layers of horizontally arranged transparent tube groups 4.4 are arranged in the space between the lower filter plate 4.2 and the upper filter plate 4.3. Each layer of the transparent tube group 4.4 consists of several transparent tubes evenly spaced, and both ends of the transparent tubes are fixedly connected to the inner wall of the tank 4.1. The spacing between adjacent transparent tubes can be selected as needed, such as 5cm, 8cm, 12cm, etc. The ultraviolet lamp 4.5 is enclosed in the transparent tube group 4.4. When the ultraviolet lamp 4.5 is powered on, it emits ultraviolet rays, which radiate outwards after passing through the transparent tubes. The spherical transparent filler 4.6 fills the space between the lower filter plate 4.2 and the upper filter plate 4.3 to form a filler zone. The surface of the transparent filler 4.6 is loaded with granular titanium dioxide photocatalyst, which can be loaded using methods such as bonding with an adhesive. The transparent tube assembly 4.4 and the transparent filler 4.6 can be made of any material, such as plastic or plexiglass, to allow light to pass through. The particle size of the transparent filler 4.6 can be selected according to needs (such as water flow rate), such as 5mm, 10mm, 15mm, etc., and multiple particle sizes of transparent filler 4.6 can be used in combination. The particle size of the titanium dioxide particles can also be selected according to needs, such as 50~100 mesh.

[0028] During operation, the water in the artificial aquaculture container 1 is first pumped by the water pump 7 to the sedimentation tank 2 for preliminary sedimentation. The inlet and outlet of the sedimentation tank 2 are located at its two ends, respectively. As the water flows from the inlet to the outlet, solid impurities gradually settle, reducing the load on the first filter 3. The circulating water then enters the first filter 3 for further filtration to remove even finer solid impurities. After filtration, the water enters the tank 4.1 through the inlet 4.7, flows upward, and passes through the lower filter plate 4.2 into the transparent packing 4.6. The titanium dioxide loaded on its surface undergoes a strong oxidation-reduction reaction under ultraviolet light, thereby degrading large organic molecules in the water into smaller molecules, which are then degraded into carbon dioxide and water. This method is not only highly efficient, fast, and environmentally friendly, but also eliminates the need for chemical agents, reducing the additional impact on the circulating water. After photocatalytic degradation, the water enters the biological treatment tank 5, where the metabolic activity of microorganisms reduces the levels of inorganic substances such as ammonia nitrogen and nitrates. For example, in an MBBR biological treatment tank, activated sludge containing microorganisms metabolizes ammonia nitrogen and nitrates in the water, thereby purifying the circulating water. Other equipment that uses biological technology to purify wastewater can also be selected as needed, and multiple devices can be used in combination.

[0029] The circulating water, purified by the biological treatment tank 5, enters the second filter 6 and, after further filtration, returns to the artificial aquaculture container 1 for reuse. Because the concentration of organic matter in the circulating water is significantly reduced after photocatalytic degradation, the microbial load in the subsequent biological treatment tank 5 is effectively reduced, accelerating the treatment rate of the microbial purification process. This speeds up the entire circulating water treatment process, better balancing the volume of water requiring treatment discharged from the artificial aquaculture container 1 with the volume of treated water that needs to be replenished, making the aquaculture system operate more efficiently. In this embodiment, the photocatalytic degradation device 4, installed before the biological treatment tank 5, uses a transparent filler 4.6 with a surface loaded with titanium dioxide photocatalyst and a transparent tube encapsulating an ultraviolet lamp 4.5. This allows for photocatalytic degradation of organic matter in the water, while the ultraviolet light also disinfects and sterilizes, eliminating the need for a separate disinfection device. Furthermore, for the titanium dioxide photocatalyst with visible light response capability (commercially available products or existing technologies can be used), after simultaneously arranging visible light lamps in at least a portion of the transparent tubes or replacing the ultraviolet lamps 4.5 in some transparent tubes with visible light lamps, the titanium dioxide photocatalyst can also utilize visible light for photocatalytic degradation. In this case, since the filler 4.6 is transparent, it facilitates the passage of visible light, thereby increasing the effective range of visible light. This allows the light emitted by each visible light lamp to cross-act on the titanium dioxide photocatalyst of the filler, improving the efficiency of photocatalytic degradation.

[0030] refer toFigure 4 In another embodiment, the lower filter plate 4.2 described in the above embodiment is laid on support rods 4.9, both ends of which are fixedly connected to the inner wall of the tank 4.1 or the aforementioned support connecting plate. Several support rods 4.9 are radially distributed, which helps to improve the load-bearing capacity of the lower filter plate 4.2 on the transparent packing material 4.6 above it. The main function of the upper filter plate 4.3 is to restrict the transparent packing material 4.6 and prevent it from overflowing under the action of water flow. Therefore, it should be understood that the pore diameter of both the lower filter plate 4.2 and the upper filter plate 4.3 is not larger than the particle size of the transparent packing material 4.6.

[0031] refer to Figure 5 In another embodiment, both ends of the transparent tube assembly 4.4 described in the above embodiment are located in the insertion tubes 4.10 on the side wall of the tank 4.1, and the two are sealed together. The wire 4.11 of the ultraviolet lamp 4.5 passes through the end of the transparent tube assembly 4.4 and is located outside the tank 4.1. After the wire is connected to the power supply and the switch is turned on, the ultraviolet lamp 4.5 is energized and emits light, providing energy ultraviolet light for photocatalytic degradation to the transparent filler 4.6. This structure of the ultraviolet lamp in this embodiment allows for convenient repair or replacement of the lamp in case of damage, without requiring personnel to enter the tank 4.1, thus avoiding the shutdown of the photocatalytic degradation device 4.

[0032] refer to Figure 6 In another embodiment, a flexible sealing sleeve 4.12 is provided between the transparent tube assembly 4.4 and the insertion tube 4.10 described in the above embodiment. The sealing sleeve 4.12 can be made of rubber or the like, and is further sealed with sealant to prevent water leakage.

[0033] In another embodiment, the side wall of the tank 4.1 between the lower filter plate 4.2 and the upper filter plate 4.3 in the above embodiment has a reflective layer to reflect ultraviolet rays, improve utilization, and increase the efficiency of photocatalytic degradation. The reflective layer can be achieved using existing technologies such as aluminum plates or stainless steel with mirror-like surfaces.

[0034] In another embodiment, a rinsing nozzle is provided below the lower filter plate 4.2 of the above embodiment. The nozzle is connected to a clean water source via a water pump to clean the lower filter plate 4.2 and prevent it from affecting the passage of circulating water.

[0035] refer to Figure 2 In another embodiment, the top of the tank 4.1 described in the above embodiment has an exhaust port 4.13 to discharge gases such as carbon dioxide generated during the photodegradation catalysis process.

[0036] refer toFigure 1 In another embodiment, the factory-scale recirculating aquaculture system for fish farming described above also includes an oxygen cone 8. The outlet of the second filter 6, the oxygen cone 8, and the inlet of the artificial aquaculture container 1 are connected in sequence to oxygenate the recycled water entering the artificial aquaculture container 1.

[0037] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A factory-scale recirculating aquaculture system for fish farming, characterized in that, The system includes, in sequence, an artificial aquaculture container, a sedimentation tank, a first filter, a photocatalytic degradation device, a biochemical tank, and a second filter, with the outlet of the second filter connected to the inlet of the artificial aquaculture container; the photocatalytic degradation device includes a tank body, a lower filter plate, an upper filter plate, a transparent tube assembly, an ultraviolet lamp, and transparent packing material; wherein: The lower and upper parts of the tank have inlets and outlets, respectively, which are connected to the first filter and the biochemical tank. The lower filter plate is horizontally fixed in the inner cavity of the tank, and the upper filter plate is located above the lower filter plate. At least one layer of the transparent tube assembly is horizontally arranged between the lower filter plate and the upper filter plate. Each layer of the transparent tube assembly consists of several transparent tubes distributed at intervals. The ultraviolet lamp is enclosed in the transparent tube assembly. The spherical transparent filler fills the space between the lower filter plate and the upper filter plate, and the surface of the transparent filler is loaded with titanium dioxide photocatalyst. The titanium dioxide photocatalyst has visible light response capability, and some of the transparent tubes are also provided with visible light lamps, or the transparent tubes are simultaneously provided with ultraviolet lamps and visible light lamps.

2. The factory-scale recirculating aquaculture system for fish farming according to claim 1, characterized in that, The lower filter plate is laid on the support rod, and both ends of the support rod are fixedly connected to the inner wall of the tank.

3. The factory-scale recirculating aquaculture system for fish farming according to claim 1, characterized in that, Both ends of the transparent tube are located in the insertion tubes on the side wall of the tank, and the two are sealed together; the wire of the ultraviolet lamp tube passes through the end of the transparent tube and is located outside the tank.

4. The factory-scale recirculating aquaculture system for fish farming according to claim 3, characterized in that, A sealing sleeve is provided between the transparent tube assembly and the insertion tube.

5. The factory-scale recirculating aquaculture system for fish farming according to claim 1, characterized in that, The tank sidewall between the lower and upper filter plates has a reflective layer.

6. The factory-scale recirculating aquaculture system for fish farming according to claim 1, characterized in that, A rinsing nozzle is installed below the lower filter plate, and the nozzle is connected to a clean water source via a water pump.

7. The factory-scale recirculating aquaculture system for fish farming according to claim 1, characterized in that, The transparent tubing and transparent filler are made of either plastic or plexiglass.

8. The factory-scale recirculating aquaculture system for fish farming according to claim 1, characterized in that, The top of the tank has an exhaust port.

9. The factory-scale recirculating aquaculture system for fish farming according to any one of claims 1-8, characterized in that, It also includes an oxygen cone, and the outlet of the second filter, the oxygen cone, and the inlet of the artificial aquaculture container are connected in sequence.

Images