A microwave sterilization device suitable for aquaculture

Abstract

This utility model provides a microwave sterilization device suitable for aquaculture, belonging to the field of aquaculture technology. It includes a flow-slowing mechanism comprising a buffer tank, a converging tube, and a long tube. The inlet of the buffer tank is connected to the aquaculture system, the expanded end of the converging tube is connected to the outlet of the buffer tank, and the long tube is connected to the contracted end of the converging tube. A microwave mechanism includes a microwave housing and a microwave transmitter. The microwave housing is connected to the long tube, and the microwave transmitter is located on both sides of the inner cavity of the microwave housing. Microwave sterilization can penetrate relatively turbid water and kill Escherichia coli, Vibrio, Aeromonas, etc., in aquaculture ponds with high sterilization efficiency. It utilizes the non-thermal effect of microwaves for sterilization, achieving low-temperature sterilization without heating the water to a high temperature.

Description

Technical Field

[0001] This utility model belongs to the field of aquaculture technology, and specifically relates to a microwave sterilization device suitable for aquaculture. Background Technology

[0002] The sustainable development of large-scale aquaculture is highly dependent on the health of the aquatic environment, and pathogen control is a core technological challenge in achieving high-density aquaculture. In closed or recirculating aquaculture systems, the limited water flow and the proliferation of feed residues, biological metabolites, and microorganisms can easily lead to eutrophication, providing a breeding ground for pathogens (such as Escherichia coli, Vibrio, and Aeromonas) and viruses.

[0003] Traditional aquaculture mainly relies on chemical disinfectants and ultraviolet (UV) disinfection to maintain water hygiene. For example, chemical disinfectants (chlorine-based agents) work by destroying microbial cell membranes and enzyme systems through strong oxidation, significantly inactivating bacteria and viruses. However, existing chemical and UV disinfection methods directly disinfect in the pond. If chemical disinfectants are used, chlorine reacts with organic matter in the water (such as humic acid and fish excrement) in a halogenation reaction, producing typical drug byproducts such as trihalomethanes (THMs) and haloacetic acids (HAAs). These byproducts not only threaten the safety of farmed organisms but also disrupt the natural aquatic ecosystem after discharge. If UV disinfection is used, UV light is significantly attenuated in turbid water, and suspended particles (such as feed residue, algae, and feces) create a shielding effect. UV light only takes effect momentarily and has no inhibitory effect on light-blind areas (pipe bends, pond wall biofilms) or newly flowing water. Utility Model Content

[0004] Based on this, the present invention provides a microwave sterilization device suitable for aquaculture, which can be adapted to sterilization of turbid water and can also reduce the generation of drug by-products.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A microwave sterilization device suitable for aquaculture, comprising: A flow-slowing mechanism includes a buffer tank, a converging pipe, and a long pipe. The inlet of the buffer tank is connected to aquaculture, the expanded end of the converging pipe is connected to the outlet of the buffer tank, and the long pipe is connected to the contracted end of the converging pipe. A microwave mechanism, comprising a microwave housing and a microwave emitting source, wherein the microwave housing is connected to the long tube and the microwave emitting source is disposed on both sides of the inner cavity of the microwave housing.

[0006] Preferably, the inner cavity of the long tube is provided with a plurality of perforated plates at a predetermined interval, and the through holes opened on the perforated plates are circular.

[0007] Preferably, a filtration mechanism is provided above the buffer water tank, and the filtration mechanism is connected to the buffer water tank.

[0008] Preferably, the microwave emission source is provided in several groups, and the several groups of microwave emission sources are evenly distributed on both sides of the inner cavity of the microwave housing.

[0009] Preferably, a microwave diffuser is provided at the top of the microwave housing, and an eddy current generator is provided at the bottom of the microwave housing.

[0010] Preferably, the microwave housing is provided with a water inlet pipe and a water outlet pipe, the water inlet pipe is provided with a first valve, and the water outlet pipe is provided with a second valve.

[0011] Preferably, it also includes an ammonia nitrogen degradation chamber, wherein an activated carbon-zeolite composite adsorption layer is provided inside the ammonia nitrogen degradation chamber, and activated carbon and zeolite are arranged alternately in sequence.

[0012] Compared with the prior art, the present invention has at least the following advantages: 1. Microwave sterilization can penetrate relatively turbid water to kill E. coli, Vibrio, Aeromonas, and other bacteria in aquaculture ponds, resulting in high sterilization efficiency. 2. It utilizes the non-thermal effect of microwaves for sterilization, achieving low-temperature sterilization without heating the water to a high temperature. 3. By using a method of extracting water from different aquaculture ponds, sterilization can be performed on water from various ponds. 4. The microwave sterilization method results in extremely low levels of drug byproducts, which will not affect water quality and ensure that the sterilized water will not harm the safety of aquaculture organisms when it is re-entered into the pond. Attached Figure Description

[0013] Figure 1 This is an isometric drawing of a microwave sterilization device suitable for aquaculture.

[0014] Figure 2 This is a schematic diagram of the cross-section of a long tube.

[0015] Figure 3 This is a schematic diagram of a microwave mechanism.

[0016] Figure 4 This is a schematic diagram of an ammonia nitrogen degradation chamber.

[0017] In the figure: slow flow mechanism 100, buffer water tank 110, tapered tube 120, long tube 130, porous plate 131, filter mechanism 140, microwave mechanism 200, microwave shell 210, water inlet pipe 211, first valve 212, water outlet pipe 213, second valve 214, microwave emission source 220, microwave diffuser 230, eddy current generator 240, ammonia nitrogen degradation box 300, activated carbon-zeolite composite adsorption layer 310. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other. The technical solutions of the present invention will be further described below with reference to the accompanying drawings of the embodiments. The present invention is not limited to the specific embodiments described below.

[0019] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "front," "rear," "left," "right," "top," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0020] Please refer to Figures 1 to 4 A microwave sterilization device suitable for aquaculture, comprising: A flow-slowing mechanism 100 includes a buffer tank 110, a tapered pipe 120, and a long pipe 130. The inlet of the buffer tank 110 is connected to aquaculture, the expanded end of the tapered pipe 120 is connected to the outlet of the buffer tank 110, and the long pipe 130 is connected to the contracted end of the tapered pipe 120. A microwave mechanism 200 includes a microwave housing 210 and a microwave source 220. The microwave housing 210 is connected to the long pipe 130, and the microwave source 220 is disposed on both sides of the inner cavity of the microwave housing 210.

[0021] Within a large-scale aquaculture base, there are fish ponds, shrimp ponds, crab ponds, etc., with each type of aquaculture pond separated. Grass carp and common carp are raised in the fish ponds, with a suitable temperature of 24-28℃ for the fish ponds, 28-32℃ for the shrimp ponds, and 20-25℃ for the crab ponds. The aquaculture inlet gates are opened, and the water from each aquaculture pond is circulated into the buffer water tank 110. Water is also pumped from the bottom of the aquaculture ponds into the buffer water tank 110. If the water flow rate is too fast, the microwave sterilization mechanism cannot penetrate the water level, resulting in a reduction in sterilization efficiency. Therefore, a buffer mechanism is provided at the front end of the microwave mechanism 200. The buffer water tank 110 has the function of buffering water flow and absorbing water pump pulses. Water flows out of the water tank and enters the tapered tube 120. Gradually, the cross-sectional area of ​​the water flow is reduced, and the flow velocity distribution is stabilized. Water from the tapered tube 120 flows into the long tube 130. Generally, the length of the long tube 130 is 20-30 meters. The long tube 130 is placed horizontally. The sufficiently long direct current pipe can eliminate the disturbance of the inlet to the water flow. Water flowing from the long pipe 130 enters the microwave housing 210 at a flow rate of 5-10 L / min. The microwave transmitter 220 is then activated, emitting a frequency band of 2450 MHz ± 50 MHz. Due to the slow water flow, the microwave transmitter 220 penetrates the water level, killing Vibrio, Escherichia coli, and Aeromonas bacteria in the water through the non-thermal effect of microwaves. Microwave sterilization can penetrate relatively turbid water, killing Escherichia coli, Vibrio, and Aeromonas bacteria in aquaculture ponds. While Escherichia coli is heat-sensitive, its non-thermal effect, rather than the thermal effect of microwaves, is utilized. After application, the cell structure of E. coli is easily damaged by the microwave electric field, and its activity can still be significantly reduced by the non-thermal effect at low temperatures. Vibrio and Aeromonas are moderately sensitive to heat, and most Vibrio and Aeromonas can be killed under low-temperature conditions and long-term microwave interference. Therefore, sterilization can be achieved through the non-thermal effect of microwaves. Sterilization using the non-thermal effect of microwaves achieves low-temperature sterilization without heating the water to a high temperature. By using the method of exporting water from different aquaculture ponds, the water in different aquaculture ponds can be sterilized. The content of drug by-products generated by microwave sterilization is extremely small and will not affect water quality, ensuring that the sterilized water will not affect the safety of aquaculture organisms when it is re-entered into the pond.

[0022] In one possible embodiment, the inner cavity of the long tube 130 is provided with a plurality of perforated plates 131 at predetermined intervals. The perforated plates 131 have the function of dividing large eddies into small microflows, realizing a smooth flow transition. At the same time, the through holes opened on the perforated plates 131 are circular. The smooth arc surface of the circular through holes can further reduce water eddies.

[0023] In one possible embodiment, since the surface of the aquaculture pond contains withered leaves and floating debris, and the bottom contains aquatic excrement, a filter mechanism 140 is installed above the buffer tank 110, and the filter mechanism 140 is connected to the buffer tank 110. Filtering the pond water serves two purposes: first, it reduces impurities in the pond water, preventing blockage of the microwave mechanism 200; second, reducing impurities lowers the turbidity of the water, which is beneficial for subsequent microwave sterilization. Simultaneously, the filtered withered leaves and excrement can be used as fertilizer in farmland and orchards.

[0024] In one possible embodiment, several groups of microwave emitters 220 are provided, and these groups of microwave emitters 220 are evenly distributed on both sides of the inner cavity of the microwave housing 210. Generally, 8-12 groups of microwave emitters 220 are provided, and the microwave emitters 220 are distributed on both sides of the microwave resonant cavity. The microwave emitters 220 on both sides emit microwaves alternately and sequentially, and the microwaves continuously and alternately penetrate the liquid level, thereby improving sterilization efficiency.

[0025] In one possible embodiment, a microwave diffuser 230 is provided at the top of the microwave housing 210. This conical microwave diffuser optimizes the distribution of the microwave field, achieving uniform radiation of electromagnetic wave energy in the water. The microwave diffuser 230 is an existing device, such as the Madel DCN series conical diffuser. A vortex generator 240 is provided at the bottom of the microwave housing 210. By inducing a spiral flow, it prolongs the residence time of the water in the microwave field and enhances the cavitation effect, synergistically destroying bacterial cell walls. The vortex generator 240 is an existing device, such as a triangular plow vortex generator. The coordinated arrangement of the microwave diffuser 230 and the vortex generator 240 creates a spiral flow in the water, further prolonging the residence time of microorganisms in the microwave field and thus improving sterilization efficiency.

[0026] In one possible embodiment, the microwave housing 210 is provided with a water inlet pipe 211 and a water outlet pipe 213. The water inlet pipe 211 is provided with a first valve 212, and the water outlet pipe 213 is provided with a second valve 214. When the microwave housing 210 is full of water, the first valve 212 on the long pipe 130 is closed to stop the water supply. The microwave transmitter 220 is then activated, emitting microwave electromagnetic waves to continuously impact the water body for 3-5 minutes. The microwave transmitter 220 is then closed, and the second valve 214 is opened to discharge the sterilized water. Water is then collected again into the microwave resonant cavity for impact sterilization until all the filtered water is sterilized.

[0027] In one possible embodiment, the system further includes an ammonia nitrogen degradation tank 300, which contains an activated carbon-zeolite composite adsorption layer 310, with activated carbon and zeolite arranged alternately. Through this activated carbon-zeolite composite adsorption method, the ammonia nitrogen content in the water is reduced to below 0.02 mg / L, thereby improving water quality by degrading ammonia nitrogen. Simultaneously, the alternating arrangement of activated carbon and zeolite effectively degrades and adsorbs ammonia nitrogen in the water, improving degradation and adsorption efficiency.

[0028] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and 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 microwave sterilization device suitable for aquaculture, characterized in that, include A flow-slowing mechanism includes a buffer tank, a converging pipe, and a long pipe. The inlet of the buffer tank is connected to aquaculture, the expanded end of the converging pipe is connected to the outlet of the buffer tank, and the long pipe is connected to the contracted end of the converging pipe. A microwave mechanism, comprising a microwave housing and a microwave emitting source, wherein the microwave housing is connected to the long tube and the microwave emitting source is disposed on both sides of the inner cavity of the microwave housing.

2. The microwave sterilization device for aquaculture as described in claim 1, characterized in that, The inner cavity of the long tube is provided with several perforated plates at preset intervals, and the through holes on the perforated plates are circular.

3. The microwave sterilization device for aquaculture as described in claim 1, characterized in that, A filtration mechanism is installed above the buffer water tank, and the filtration mechanism is connected to the buffer water tank.

4. The microwave sterilization device for aquaculture as described in claim 1, characterized in that, The microwave emission source is provided in several groups, and the several groups of microwave emission sources are evenly distributed on both sides of the inner cavity of the microwave shell.

5. A microwave sterilization device suitable for aquaculture as described in claim 4, characterized in that, A microwave diffuser is provided at the top of the microwave housing, and an eddy current generator is provided at the bottom of the microwave housing.

6. The microwave sterilization device for aquaculture as described in claim 1, characterized in that, The microwave housing is provided with a water inlet pipe and a water outlet pipe. The water inlet pipe is provided with a first valve, and the water outlet pipe is provided with a second valve.

7. The microwave sterilization device for aquaculture as described in claim 1, characterized in that, It also includes an ammonia nitrogen degradation chamber, which is equipped with an activated carbon-zeolite composite adsorption layer, with activated carbon and zeolite arranged alternately.

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