Sodium hypochlorite disinfection device and recirculating aquaculture system

Abstract

The utility model discloses a sodium hypochlorite disinfection device and recirculating aquaculture system.The sodium hypochlorite disinfection device comprises a water conveying pipeline, an electrolysis part and a water pump, the water conveying pipeline is configured to convey seawater or tail water filtered in the recirculating aquaculture system, and the electrolysis part is connected with the water conveying pipeline; the electrolysis part electrolyzes flowing seawater or tail water to generate sodium hypochlorite, the water pump is arranged on the water conveying pipeline, and the electrolysis part is located at the downstream of the water pump. According to the scheme, the problems of storage deterioration, high transportation cost and unstable concentration of purchased medicaments can be avoided, the sodium hypochlorite disinfection device is integrated with the recirculating aquaculture system, and the occupied space is small.

Description

Technical Field

[0001] This utility model relates to the field of aquaculture technology, and in particular to a sodium hypochlorite disinfection device and a recirculating aquaculture system. Background Technology

[0002] Currently, disinfection methods in the recirculating aquaculture system (RAS) industry mostly involve ultraviolet light combined with ozone. Sodium hypochlorite disinfection typically involves adding a sodium hypochlorite solution, which presents problems such as storage spoilage, high transportation costs, concentration fluctuations, and low precision in manual dosing, easily leading to excessive or insufficient residual chlorine, threatening the safety of farmed organisms. Traditional electrolytic cells require independent installation, occupying a large space and having low integration with the aquaculture system.

[0003] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0004] In response to the problems mentioned in the background art, this utility model proposes a sodium hypochlorite disinfection device and a recirculating aquaculture system. Sodium hypochlorite is generated by directly electrolyzing water in the water supply pipeline, avoiding the problems of deterioration during storage, high transportation costs, and unstable concentration of purchased chemicals. The sodium hypochlorite disinfection device is integrated with the recirculating aquaculture system, which occupies little space.

[0005] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0006] This utility model provides a sodium hypochlorite disinfection device for use in recirculating aquaculture systems, comprising:

[0007] The water supply pipeline is configured to transport filtered seawater or wastewater from the recirculating aquaculture system.

[0008] An electrolysis unit is connected to the water supply pipeline, and the electrolysis unit electrolyzes the flowing seawater or tailwater to generate sodium hypochlorite;

[0009] A water pump, installed on the water pipeline, is configured to provide power for water flow, and the electrolysis unit is located downstream of the water pump.

[0010] In some embodiments of this application, the electrolysis unit is located 1-2m downstream of the water pump.

[0011] In some embodiments of this application, the electrolysis unit includes an electrolysis pipeline, and the water supply pipeline includes an inlet pipeline and an outlet pipeline. One end of the electrolysis pipeline is connected to the inlet pipeline, and the other end is connected to the outlet pipeline.

[0012] A positive electrode plate is provided on the electrolysis pipeline, the positive electrode plate is connected to a positive electrode assembly, and the positive electrode assembly is inserted into the electrolysis pipeline;

[0013] A negative electrode plate is provided on the electrolysis pipeline, the negative electrode plate is connected to a negative electrode group, and the negative electrode group is inserted into the electrolysis pipeline;

[0014] The positive electrode group and the negative electrode group constitute an electrode group, which is configured to electrolyze water flowing through the electrolysis pipeline to generate sodium hypochlorite.

[0015] In some embodiments of this application, the electrolytic pipeline is longitudinally cut along a direction perpendicular to the axis of the electrolytic pipeline, and the longitudinal section area of ​​the electrode group accounts for 65-75% of the longitudinal section area of ​​the electrolytic pipeline.

[0016] In some embodiments of this application, the distance between the positive electrode plate and the negative electrode plate is 8-12 mm.

[0017] In some embodiments of this application, a first flange and a second flange are respectively provided at both ends of the electrolysis pipeline, the positive electrode plate is fixedly disposed between the first flange and the second flange at the corresponding ends, and the negative electrode plate is fixedly disposed between the first flange and the second flange at the corresponding ends.

[0018] The inlet pipe and the outlet pipe are respectively fixedly connected to the first flange at their respective ends, so that the electrolysis pipe is connected to the inlet pipe and the outlet pipe respectively.

[0019] In some embodiments of this application, the inner diameter of the electrolysis pipeline is 150-250 mm.

[0020] In some embodiments of this application, the water supply pipeline includes a main water inlet pipeline, a main water outlet pipeline, multiple branch water inlet pipelines, and multiple branch water outlet pipelines. The multiple branch water inlet pipelines are connected to the main water inlet pipeline, and the multiple branch water outlet pipelines are connected to the main water outlet pipeline. Each branch water inlet pipeline corresponds to one branch water outlet pipeline, and the electrolysis section is provided between adjacent branch water inlet pipelines and branch water outlet pipelines.

[0021] In some embodiments of this application, a recirculating aquaculture system is provided, including a seawater pretreatment device and a sodium hypochlorite disinfection device as described above. The seawater filtered by the seawater pretreatment device is then electrolyzed and disinfected by the sodium hypochlorite disinfection device.

[0022] In some embodiments of this application, a recirculating aquaculture system is provided, including a wastewater treatment device and a sodium hypochlorite disinfection device as described above. The wastewater filtered by the wastewater treatment device is then electrolyzed and disinfected by the sodium hypochlorite disinfection device.

[0023] Compared with the prior art, the advantages and positive effects of this utility model are:

[0024] This application integrates a sodium hypochlorite disinfection device into the water supply pipeline of a recirculating aquaculture system, directly electrolyzing the water flowing through the pipeline to generate sodium hypochlorite. This avoids the problems of storage and deterioration of purchased chemicals, high transportation costs, and unstable concentrations, achieving a "produced and used immediately" green disinfection mode. The electrolysis unit is embedded in the recirculating water pipeline, directly utilizing the water flow power to complete the electrolysis reaction and mix the chemicals, avoiding the need for independent installation of traditional electrolytic cells, saving space and reducing energy consumption.

[0025] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of a sodium hypochlorite disinfection device according to some embodiments;

[0028] Figure 2 This is another structural schematic diagram of a sodium hypochlorite disinfection device according to some embodiments;

[0029] Figure 3 This is a structural diagram of an electrolysis unit according to some embodiments;

[0030] Figure 4 This is an exploded view of an electrolysis section according to some embodiments.

[0031] Figure label:

[0032] 100. Water supply pipeline; 110. Water inlet pipeline; 111. Main water inlet pipeline; 112. Branch water inlet pipeline; 120. Water outlet pipeline; 121. Main water outlet pipeline; 122. Branch water outlet pipeline;

[0033] 200, Electrolysis section; 210, Electrolysis pipeline; 220, Positive electrode plate; 230, Negative electrode plate; 240, Positive electrode assembly; 250, Negative electrode assembly; 260, First flange; 270, Second flange;

[0034] 300. Water pump;

[0035] 400. Sensor group;

[0036] 500, Controller;

[0037] 600. Flow switch. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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 application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0040] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0041] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0044] In some embodiments of this application, a recirculating aquaculture system is provided, including a seawater pretreatment device and a sodium hypochlorite disinfection device. The seawater filtered by the seawater pretreatment device is then electrolyzed and disinfected by the sodium hypochlorite disinfection device.

[0045] In some embodiments of this application, a recirculating aquaculture system is provided, including a wastewater treatment device and a sodium hypochlorite disinfection device, wherein the wastewater filtered by the wastewater treatment device is electrolyzed and disinfected by the sodium hypochlorite disinfection device.

[0046] In some embodiments of this application, a sodium hypochlorite disinfection device is provided, which is applied in a recirculating aquaculture system to electrolyze and disinfect water.

[0047] Reference Figure 1 The sodium hypochlorite disinfection device includes a water supply pipeline 100, which is configured to transport filtered seawater or tailwater from a recirculating aquaculture system.

[0048] The sodium hypochlorite disinfection device also includes an electrolysis unit 200, which is fixedly connected to the water supply pipeline 100. The electrolysis unit 200 electrolyzes the flowing seawater or tailwater to generate sodium hypochlorite. Figure 3 This is a structural diagram of the electrolysis unit 200. Figure 4 This is an exploded view of the electrolysis section 200.

[0049] The sodium hypochlorite disinfection device also includes a water pump 300, which is installed on the water supply pipeline 100 and configured to provide power for water flow. The electrolysis unit 200 is located downstream of the water pump 300.

[0050] This application integrates a sodium hypochlorite disinfection device into the water supply pipeline 100 of a recirculating aquaculture system, directly electrolyzing the water flowing through the pipeline 100 to generate sodium hypochlorite, achieving the following technical effects:

[0051] Eliminate dependence on chemical agents: Avoid the problems of storage and deterioration, high transportation costs and unstable concentration of purchased agents, and realize a green disinfection model of "production and use as soon as possible";

[0052] Improve system integration and efficiency: The electrolysis unit 200 is embedded in the circulating water pipe, and the electrolysis reaction and reagent mixing are completed directly by the water flow power, avoiding the independent installation requirements of traditional electrolysis cells, saving space and reducing energy consumption;

[0053] Overcoming the problems of electrode scaling and short lifespan: Through periodic polarity reversal and titanium-based coating electrode design, calcium and magnesium deposition is suppressed, extending electrode lifespan to more than twice that of traditional technologies, reducing maintenance frequency and costs;

[0054] Adaptable to low-salinity aquaculture environments: Integrating real-time salinity monitoring and dynamic salt replenishment mechanisms to ensure stable electrolysis in fresh or brackish water (salinity ≥ 2‰), breaking through the dependence of traditional electrolysis technology on high-salinity water bodies;

[0055] Ensuring safety and precise control: Combining multi-parameter (residual chlorine, salinity, pH, flow rate) closed-loop feedback control, the sodium hypochlorite concentration can be precisely adjusted (±0.05 mg / L), while the risks of explosion and biological poisoning are avoided through hydrogen emission and emergency neutralization modules;

[0056] Reduce overall operating costs: By optimizing electrolysis efficiency (reducing energy consumption by more than 50%) and automating control, we reduce human intervention and provide an economical and sustainable disinfection solution for high-density recirculating aquaculture.

[0057] In some embodiments of this application, the electrolysis unit 200 is located downstream of the water pump 300, utilizing the turbulence of the water flow to enhance the mixing effect. Specifically, the electrolysis unit 200 is located 1-2 mm downstream of the water pump 300.

[0058] In some embodiments of this application, the electrolysis unit 200 includes an electrolysis pipeline 210, and the water supply pipeline 100 includes an inlet pipeline 110 and an outlet pipeline 120. One end of the electrolysis pipeline 210 is connected to the inlet pipeline 110, and the other end is connected to the outlet pipeline 120. Water flows sequentially through the inlet pipeline 110, the electrolysis pipeline 210, and the outlet pipeline 120.

[0059] A positive electrode plate 220 is provided on the electrolysis line 210, and the positive electrode plate 220 is connected to a positive electrode assembly 240, which is inserted into the electrolysis line 210. A negative electrode plate 230 is provided on the electrolysis line 210, and the negative electrode plate 230 is connected to a negative electrode assembly 250, which is inserted into the electrolysis line 210.

[0060] The positive electrode group 240 and the negative electrode group 250 constitute an electrode group, which is configured to electrolyze water flowing through the electrolysis pipeline 210 to generate sodium hypochlorite. Electrolysis of water using an electrode group is a conventional technique, and the principle will not be elaborated upon in this application.

[0061] Electrolysis line 210 connects water inlet line 110 and water outlet line 120, and integrates electrolysis unit 200 on water supply line 100. Electrolysis unit 200 adopts a ring electrode layout, with titanium-based coated anodes and stainless steel cathodes arranged alternately.

[0062] In some embodiments of this application, the electrolysis pipeline 210 is longitudinally cut along a direction perpendicular to the axis of the electrolysis pipeline 210, and the longitudinal section area of ​​the electrode group accounts for 65-75% of the longitudinal section area of ​​the electrolysis pipeline 210, ensuring that the water flow fully contacts the electrolysis area.

[0063] In some embodiments of this application, the distance between the positive electrode plate 220 and the negative electrode plate 230 is 8-12mm to ensure the electrolysis effect.

[0064] In some embodiments of this application, the inner diameter of the electrolysis pipeline 210 is 150-250mm to meet the circulating water flow requirements.

[0065] In some embodiments of this application, the electrolysis pipeline 210 is made of UPVC or fiberglass, which is corrosion-resistant and insulating.

[0066] In some embodiments of this application, a first flange 260 and a second flange 270 are respectively provided at both ends of the electrolysis pipeline 210. A positive electrode plate 220 is fixedly disposed between the first flange 260 and the second flange 270 at the corresponding ends, and a negative electrode plate 230 is fixedly disposed between the first flange 260 and the second flange 270 at the corresponding ends.

[0067] The inlet pipe 110 and the outlet pipe 120 are fixedly connected to the first flange 260 at their respective ends, so that the electrolysis pipe 210 is connected to the inlet pipe 110 and the outlet pipe 120 respectively.

[0068] The flange connection method facilitates the fixed installation of electrodes and adjacent pipelines.

[0069] In some embodiments of this application, the electrolysis unit 200 employs intermittent electrolysis, for example, working for 2 minutes and stopping for 30 seconds, reducing energy consumption by 20-30%.

[0070] In some embodiments of this application, a nano-coating is applied to the electrode surface to reduce the chlorine evolution overpotential and improve the current efficiency to 85%.

[0071] In some embodiments of this application, the sodium hypochlorite disinfection device further includes a sensor group 400 for detecting relevant parameters of the water in the water supply pipeline 100.

[0072] For example, sodium hypochlorite disinfection devices include residual chlorine sensors, salinity sensors, pH sensors, flow meters, etc.

[0073] In some embodiments of this application, the sodium hypochlorite disinfection device also includes a controller 500, such as a PLC or an embedded microcontroller, with a built-in PID algorithm that updates the current output every 5 seconds.

[0074] In some embodiments of this application, the sodium hypochlorite disinfection device also includes a human-machine interactive touch screen that displays the residual chlorine concentration, salinity, current value and alarm status (such as hydrogen accumulation, electrode failure) in real time.

[0075] In some embodiments of this application, the sodium hypochlorite disinfection device further includes a hydrogen concentration monitoring module, which triggers an alarm, such as an audible and visual alarm, when the hydrogen concentration exceeds 1%.

[0076] In some embodiments of this application, the sodium hypochlorite disinfection device further includes a water flow switch 600, which is installed on the water inlet pipe 110 and used to control the flow of water.

[0077] In some embodiments of this application, reference is made to Figure 2 The water supply pipeline 100 includes a main water inlet pipeline 111, a main water outlet pipeline 121, multiple branch water inlet pipelines 112 and multiple branch water outlet pipelines 122. The multiple branch water inlet pipelines 112 are connected to the main water inlet pipeline 111, and the multiple branch water outlet pipelines 122 are connected to the main water outlet pipeline 121. The multiple branch water inlet pipelines 112 and the multiple branch water outlet pipelines 122 correspond one-to-one. An electrolysis unit 200 is provided between adjacent branch water inlet pipelines 112 and branch water outlet pipelines 122. Figure 2 The middle arrow indicates the direction of water flow.

[0078] In high-flow-rate systems, multiple electrolysis units (200 units in parallel) are used to improve electrolysis efficiency and disinfection effect.

[0079] The recirculating aquaculture system using sodium hypochlorite disinfection in this application has the following beneficial effects:

[0080] Zero chemical additives: Sodium hypochlorite is generated directly by electrolyzing seawater or wastewater, avoiding the pollution risks caused by the transportation and storage of purchased chemicals and reducing carbon footprint;

[0081] No harmful byproducts: By precisely controlling electrolysis parameters (current density, pH), chlorate formation is suppressed (concentration <0.1 mg / L), far below the international standard limit (0.5 mg / L);

[0082] Rapid mixing and efficient sterilization: The sodium hypochlorite generated by electrolysis dissolves directly in the pipe water flow, with a contact time of ≤3 seconds and a sterilization rate of ≥99.9% (against Vibrio, Aeromonas, etc.).

[0083] The residual chlorine concentration is controlled with an accuracy of ±0.05 mg / L (compared to ±0.2 mg / L with traditional technology), avoiding stress responses to cultured organisms caused by concentration fluctuations.

[0084] Broad-spectrum adaptability: The disinfection efficiency fluctuates by less than 5% within the salinity range of 2‰-35‰ and the water temperature range of 10-30℃, making it suitable for multi-species aquaculture scenarios;

[0085] Energy saving: Pulse electrolysis technology and nano-coated electrode design reduce the energy consumption for sodium hypochlorite production to 0.3 kW•h / g (compared to 0.7 kW•h / g for traditional electrolyzers).

[0086] Reduced space footprint: The embedded electrolysis unit 200 design reduces the equipment size by 70%, making it suitable for compact aquaculture workshops;

[0087] Intelligent operation and maintenance: Supports remote monitoring and parameter adjustment (via mobile APP or PC), with a fault self-diagnosis accuracy rate of >95%;

[0088] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0089] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A sodium hypochlorite disinfection device, applied in a recirculating aquaculture system, characterized in that, Including: The water supply pipeline is configured to transport filtered seawater or wastewater from the recirculating aquaculture system. An electrolysis unit is connected to the water supply pipeline, and the electrolysis unit electrolyzes the flowing seawater or tailwater to generate sodium hypochlorite; A water pump, installed on the water pipeline, is configured to provide power for water flow, and the electrolysis unit is located downstream of the water pump.

2. The sodium hypochlorite disinfection device according to claim 1, characterized in that, The electrolysis unit is located 1-2m downstream of the water pump.

3. The sodium hypochlorite disinfection device according to claim 1, characterized in that, The electrolysis unit includes an electrolysis pipeline, and the water supply pipeline includes an inlet pipeline and an outlet pipeline. One end of the electrolysis pipeline is connected to the inlet pipeline, and the other end is connected to the outlet pipeline. A positive electrode plate is provided on the electrolysis pipeline, the positive electrode plate is connected to a positive electrode assembly, and the positive electrode assembly is inserted into the electrolysis pipeline; A negative electrode plate is provided on the electrolysis pipeline, the negative electrode plate is connected to a negative electrode group, and the negative electrode group is inserted into the electrolysis pipeline; The positive electrode group and the negative electrode group constitute an electrode group, which is configured to electrolyze water flowing through the electrolysis pipeline to generate sodium hypochlorite.

4. The sodium hypochlorite disinfection device according to claim 3, characterized in that, The electrolysis pipeline is longitudinally cut along a direction perpendicular to the axis of the electrolysis pipeline, and the longitudinal section area of ​​the electrode assembly accounts for 65-75% of the longitudinal section area of ​​the electrolysis pipeline.

5. The sodium hypochlorite disinfection device according to claim 3, characterized in that, The distance between the positive electrode plate and the negative electrode plate is 8-12mm.

6. The sodium hypochlorite disinfection device according to claim 3, characterized in that, The electrolysis pipeline is provided with a first flange and a second flange at both ends, the positive electrode plate is fixedly disposed between the first flange and the second flange at the corresponding ends, and the negative electrode plate is fixedly disposed between the first flange and the second flange at the corresponding ends. The inlet pipe and the outlet pipe are respectively fixedly connected to the first flange at their respective ends, so that the electrolysis pipe is connected to the inlet pipe and the outlet pipe respectively.

7. The sodium hypochlorite disinfection device according to claim 3, characterized in that, The inner diameter of the electrolysis pipeline is 150-250mm.

8. The sodium hypochlorite disinfection apparatus according to any one of claims 1 to 7, characterized in that, The water supply pipeline includes a main inlet pipeline, a main outlet pipeline, multiple branch inlet pipelines, and multiple branch outlet pipelines. The multiple branch inlet pipelines are connected to the main inlet pipeline, and the multiple branch outlet pipelines are connected to the main outlet pipeline. Each branch inlet pipeline corresponds to a branch outlet pipeline, and the electrolysis unit is provided between adjacent branch inlet pipelines and branch outlet pipelines.

9. A recirculating aquaculture system, characterized in that, It includes a seawater pretreatment device and a sodium hypochlorite disinfection device as described in any one of claims 1 to 8, wherein the seawater filtered by the seawater pretreatment device is electrolyzed and disinfected by the sodium hypochlorite disinfection device.

10. A recirculating aquaculture system, characterized in that, It includes a wastewater treatment device and a sodium hypochlorite disinfection device as described in any one of claims 1 to 8, wherein the wastewater filtered by the wastewater treatment device is electrolyzed and disinfected by the sodium hypochlorite disinfection device.

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