Hypochlorous acid and sodium hydroxide co-production system of double-channel water electrolysis unit

Abstract

The invention relates to the technical field of water electrolysis, and discloses a hypochlorous acid and sodium hydroxide co-production system of a two-channel water electrolysis unit, which comprises a water electrolysis unit main body, an electrolyte conveying module, an electrolysis module, a product collection and separation module and a cyclic utilization module, an anode electrolysis channel and a cathode electrolysis channel are arranged in the water electrolysis unit main body; the electrolyte conveying module is used for conveying prepared electrolyte to the anode electrolysis channel and the cathode electrolysis channel respectively; the electrolysis module is used for performing an electrolysis process in the anode electrolysis channel and the cathode electrolysis channel; the product collection and separation module is used for collecting and separating products at outlets of the anode electrolysis channel and the cathode electrolysis channel respectively; the recycling module is used for recycling the separated gas and recycling wastewater generated in the electrolysis process; according to the invention, co-production of hypochlorous acid and sodium hydroxide is realized, and the scene of simultaneous demand of the market on two products is met.

Description

Technical Field

[0001] The present invention relates to the technical field of electrolyzed water, and in particular to a hypochlorous acid and sodium hydroxide co-production system of a dual-channel electrolyzed water unit. Background Art

[0002] Hypochlorous acid and sodium hydroxide are important chemical products with a wide range of applications in multiple fields. Hypochlorous acid has strong oxidizing properties and is effective in disinfection, sterilization, water treatment, and other aspects. Sodium hydroxide is a basic chemical raw material and is widely used in papermaking, textiles, petrochemicals and other industries. At present, the production of hypochlorous acid and sodium hydroxide mostly adopts separate production processes. This method has problems such as low raw material utilization, large equipment investment, and low production efficiency. Electrolysis water technology provides a new idea for the co-production of multiple chemical products, but the existing electrolysis water co-production technology still has shortcomings in product purity and production stability, and cannot meet the demand for the co-production of hypochlorous acid and sodium hydroxide in large-scale industrial production. Summary of the Invention

[0003] The purpose of the present invention is to solve the above problems and design a hypochlorous acid and sodium hydroxide co-production system of a dual-channel water electrolysis unit.

[0004] The present invention provides a hypochlorous acid and sodium hydroxide co-production system of a dual-channel water electrolysis unit, which includes a water electrolysis unit body, an electrolyte delivery module, an electrolysis module, a product collection and separation module, and a recycling module. The water electrolysis unit body is provided with an anode electrolysis channel and a cathode electrolysis channel, wherein: The electrolyte delivery module is used to deliver the configured electrolyte to the anode electrolysis channel and the cathode electrolysis channel respectively; an electrolysis module for performing an electrolysis process in the anode electrolysis channel and the cathode electrolysis channel; Product collection and separation module, used to collect and separate products at the outlet of the anode electrolysis channel and the cathode electrolysis channel respectively; The recycling module is used to recycle the separated gas and recycle the wastewater generated during the electrolysis process.

[0005] Optionally, in a first implementation of the present invention, the anode electrolysis channel and the cathode electrolysis channel are independent of each other and separated by an ion exchange membrane.

[0006] Optionally, in a second implementation of the present invention, the electrolyte transport module includes: The anode water inlet pipeline connected to the anode electrolytic cell water inlet of the anode electrolysis channel and the cathode water inlet pipeline connected to the cathode electrolytic cell water inlet of the cathode electrolysis channel together constitute the electrolyte transportation path, and the flow rate of the electrolyte entering the anode electrolysis channel and the cathode electrolysis channel are both regulated by flow control valves.

[0007] Optionally, in a third implementation of the present invention, the electrolysis module includes: In the anode electrolysis channel, an inert electrode is used as the anode. Under the action of a DC electric field, chloride ions lose electrons at the anode and undergo an oxidation reaction to generate chlorine. At the same time, water molecules decompose at the anode to generate oxygen and hydrogen ions. The generated chlorine is partially dissolved in water and reacts with water to generate hypochlorous acid and hydrochloric acid. In the cathode electrolysis channel, a metal electrode is used as the cathode. Water molecules gain electrons at the cathode and undergo a reduction reaction to generate hydrogen and hydroxide ions. The sodium ions in the anode electrolysis channel migrate to the cathode electrolysis channel through the ion exchange membrane and combine with the generated hydroxide ions to form sodium hydroxide, thereby realizing the electrolysis process in the anode electrolysis channel and the cathode electrolysis channel.

[0008] Optionally, in a fourth implementation of the present invention, the water outlet of the anode electrolysis channel is connected to a first water outlet pipeline, and the water outlet of the cathode electrolysis channel is connected to a second water outlet pipeline, and the first water outlet pipeline and the second water outlet pipeline are respectively used for product output.

[0009] Optionally, in a fifth implementation of the present invention, the mixed solution is collected at the outlet of the first water outlet pipeline, and the gas is separated by a gas-liquid separation device, and then the solution is further processed; The solution containing sodium hydroxide is collected at the outlet of the second water outlet pipeline and processed to obtain sodium hydroxide solid or sodium hydroxide solution.

[0010] Optionally, in a sixth implementation of the present invention, the mixed solution includes at least hypochlorous acid, hydrochloric acid, and a small amount of chlorine and oxygen.

[0011] Optionally, in a seventh implementation of the present invention, the concentration range of the sodium hydroxide solution is 5%-20%.

[0012] Optionally, in an eighth implementation of the present invention, the separation device uses a filter with a filtration accuracy of 0.1-10 μm.

[0013] Optionally, in a ninth embodiment of the present invention, the recycling module includes a circulation pipeline, which is respectively connected to the anode electrolysis channel and the cathode electrolysis channel, and the circulation pipeline is provided with a circulation pump with a flow range of 5-30L / min and a filter with a filtration accuracy of 0.5-5μm.

[0014] In the technical solution provided by the present invention, the configured electrolyte is respectively transported to the anode electrolysis channel and the cathode electrolysis channel, the electrolysis process is carried out in the anode electrolysis channel and the cathode electrolysis channel, the products are collected and separated at the outlets of the anode electrolysis channel and the cathode electrolysis channel respectively, the separated gas is recovered and processed, and the wastewater generated in the electrolysis process is recycled; the present invention provides independent anode electrolysis channels and cathode electrolysis channels for producing hypochlorous acid solution and sodium hydroxide solution respectively, thereby achieving the co-production of hypochlorous acid and sodium hydroxide, meeting the market demand for both products, reducing equipment investment and floor space; the use of ion exchange membranes and recycling modules optimizes the flow of the electrolyte and the ion transport process, and improves the electrolysis efficiency; compared with equipment for separately producing hypochlorous acid and sodium hydroxide, the co-production system of the present invention reduces energy consumption and water resource waste, and the recycling module treats gas and wastewater, further improving resource utilization, conforming to the development trend of energy conservation and environmental protection, and having good economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Various other advantages and benefits will become apparent to those skilled in the art by reading the following detailed description of the preferred embodiment.The accompanying drawings are only for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention.

[0016] Figure 1 A schematic structural diagram of a hypochlorous acid and sodium hydroxide co-production system of a dual-channel water electrolysis unit provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0018] See also Figure 1 The hypochlorous acid and sodium hydroxide co-production system of the dual-channel water electrolysis unit provided in this embodiment includes a water electrolysis unit body, an electrolyte delivery module, an electrolysis module, a product collection and separation module, and a recycling module. The water electrolysis unit body is provided with an anode electrolysis channel and a cathode electrolysis channel, wherein: The electrolyte delivery module is used to deliver the configured electrolyte to the anode electrolysis channel and the cathode electrolysis channel respectively; an electrolysis module for performing an electrolysis process in the anode electrolysis channel and the cathode electrolysis channel; Product collection and separation module, used to collect and separate products at the outlet of the anode electrolysis channel and the cathode electrolysis channel respectively; The recycling module is used to recycle the separated gas and recycle the wastewater generated during the electrolysis process.

[0019] As a preferred implementation of this embodiment, the anode electrolysis channel and the cathode electrolysis channel are independent of each other and separated by an ion exchange membrane.

[0020] As a preferred implementation of this embodiment, the electrolyte delivery module includes: The anode water inlet pipeline connected to the anode electrolytic cell water inlet of the anode electrolysis channel and the cathode water inlet pipeline connected to the cathode electrolytic cell water inlet of the cathode electrolysis channel together constitute the electrolyte transportation path, and the flow rate of the electrolyte entering the anode electrolysis channel and the cathode electrolysis channel are both regulated by flow control valves.

[0021] As a preferred implementation of this embodiment, the electrolysis module includes: In the anode electrolysis channel, an inert electrode is used as the anode. Under the action of a DC electric field, chloride ions lose electrons at the anode and undergo an oxidation reaction to generate chlorine. At the same time, water molecules decompose at the anode to generate oxygen and hydrogen ions. The generated chlorine is partially dissolved in water and reacts with water to generate hypochlorous acid and hydrochloric acid. In the cathode electrolysis channel, a metal electrode is used as the cathode. Water molecules gain electrons at the cathode and undergo a reduction reaction to generate hydrogen and hydroxide ions. The sodium ions in the anode electrolysis channel migrate to the cathode electrolysis channel through the ion exchange membrane and combine with the generated hydroxide ions to form sodium hydroxide, thereby realizing the electrolysis process in the anode electrolysis channel and the cathode electrolysis channel.

[0022] As a preferred implementation of this embodiment, the water outlet of the anode electrolysis channel is connected to the first water outlet pipeline, and the water outlet of the cathode electrolysis channel is connected to the second water outlet pipeline. The first water outlet pipeline and the second water outlet pipeline are respectively used for product output.

[0023] As a preferred implementation of this embodiment, the mixed solution is collected at the outlet of the first water outlet pipeline, and the gas is separated by a gas-liquid separation device, and then the solution is further processed; The solution containing sodium hydroxide is collected at the outlet of the second water outlet pipeline and processed to obtain sodium hydroxide solid or sodium hydroxide solution.

[0024] As a preferred implementation of this embodiment, the mixed solution at least includes hypochlorous acid, hydrochloric acid, and a small amount of chlorine and oxygen.

[0025] As a preferred implementation of this embodiment, the concentration range of the sodium hydroxide solution is 5%-20%.

[0026] As a preferred implementation of this embodiment, the separation device uses a filter with a filtration accuracy of 0.1-10 μm.

[0027] As a preferred implementation of this embodiment, the recycling module includes a circulation pipeline, which is connected to the anode electrolysis channel and the cathode electrolysis channel respectively. The circulation pipeline is provided with a circulation pump with a flow range of 5-30L / min and a filter with a filtration accuracy of 0.5-5μm.

[0028] As a preferred embodiment of this embodiment, a first water inlet pipe connected to the first electrolytic cell water inlet of the anode electrolysis channel and a second water inlet pipe connected to the second electrolytic cell water inlet of the cathode electrolysis channel together form the basic path for transporting the electrolyte. The first water inlet pipe is equipped with a first flow control valve and a first water quality regulating device, and the second water inlet pipe is equipped with a second flow control valve and a second water quality regulating device. The first and second flow control valves can precisely adjust the flow rate of electrolyte entering the first and second electrolytic cells; the first and second water quality regulating devices are used to adjust parameters such as the conductivity of the electrolyte entering the corresponding electrolytic cells to ensure that the electrolyte meets the electrolysis requirements, thereby stably transporting the configured electrolyte to the first and second electrolytic cells respectively. The first electrolytic cell is equipped with a first anode and a first cathode, the first anode being connected to the positive pole of the power supply, and the first cathode being connected to the negative pole of the power supply; the second electrolytic cell is equipped with a second anode and a second cathode, the second anode being connected to the positive pole of the power supply, and the second cathode being connected to the negative pole of the power supply. Ion exchange membranes are also installed in the first and second electrolytic cells, separating the cells into an anode chamber and a cathode chamber, forming a complete electrolysis space. In the first electrolytic cell, an oxidation reaction occurs in the anode chamber, where hydroxide ions produced by water ionization lose electrons at the first anode to form oxygen and water, while also producing hydrogen ions. A reduction reaction occurs in the cathode chamber, where hydrogen ions produced by water ionization gain electrons to form hydrogen gas. The ion exchange membranes allow anions to pass through, allowing hypochlorite ions produced in the anode chamber to enter the cathode chamber through the membranes and combine with hydrogen ions to form hypochlorous acid. In the second electrolytic cell, hydroxide ions generated by water ionization in the anode chamber lose electrons to form oxygen and water, while hydrogen ions generated by water ionization in the cathode chamber gain electrons to form hydrogen gas. Sodium ions gain electrons at the second cathode to form sodium atoms, which react with water to form sodium hydroxide and hydrogen gas. The ion exchange membrane allows cations to pass through, allowing the hydroxide ions generated in the anode chamber to pass through the ion exchange membrane into the cathode chamber, where they combine with sodium ions to form sodium hydroxide, thus completing the electrolysis process in the anode and cathode electrolysis channels. A first water outlet pipe connected to the water outlet of the first electrolytic cell and a second water outlet pipe connected to the water outlet of the second electrolytic cell are respectively used for product output. A first product collection container is provided on the first water outlet pipe, and a second product collection container is provided on the second water outlet pipe to collect the hypochlorous acid solution and sodium hydroxide solution generated at the outlets of the anode and cathode electrolysis channels, respectively. At the same time, corresponding separation devices (such as filtration, precipitation and other structures) can be set in the collection container or pipeline to separate impurities that may exist in the product to ensure that high-purity target products are collected; the system also includes a circulation pipeline, which is connected to the first electrolytic cell and the second electrolytic cell respectively, and is provided with a circulation pump and a filter.After the circulation pump is started, the electrolyte in the first and second electrolytic cells is circulated through the circulation pipeline. The filter removes impurities from the electrolyte, enabling the recycling of wastewater (such as unreacted electrolyte) generated during the electrolysis process. Furthermore, gases (such as hydrogen and oxygen) generated during the electrolysis process can be recovered and processed through dedicated gas collection pipelines and recovery and processing equipment (such as gas compression and storage equipment), avoiding direct gas discharge that would waste resources and pose safety risks. The control system includes a controller electrically connected to the first and second flow control valves, the circulation pump, and a power supply. The controller automatically adjusts the openings of the first and second flow control valves according to preset parameters to control the amount of water entering the first and second electrolytic cells. The controller also controls the speed of the circulation pump to adjust the electrolyte circulation flow rate. Furthermore, the controller automatically adjusts the output voltage and current of the power supply based on product concentration detection results to ensure stable concentrations of the hypochlorous acid solution and sodium hydroxide solution.

[0029] As a preferred implementation of this embodiment, the system of this embodiment must comply with the following principles when running: 1. System operation must be centered around achieving efficient co-production of hypochlorous acid and sodium hydroxide. Overall coordination and planning must be implemented for the electrolyte delivery module, electrolysis module, product collection and separation module, recycling module, and control system. The operating parameters of each module must match each other. For example, the electrolyte delivery module can precisely control electrolyte flow and conductivity based on the processing capacity of the electrolysis module to avoid impacts on overall production efficiency and product quality due to abnormal operation or parameter mismatches in a single module. Furthermore, the control system monitors the operating status of each module in real time and dynamically adjusts its operating parameters based on preset logic and feedback information to ensure stable and efficient system operation. 2. Principle of precise control: Precise parameter control: Operation is strictly adhered to the parameters specified in the technical plan. For example, the power supply output voltage is maintained at 3-15V, the output current is controlled within 1-10A, the electrolyte flow rate is precisely adjusted within the range of 0-20L / min using a flow control valve, and the conductivity is maintained within the range of 50-500μS / cm. By precisely controlling these key parameters, the stability and efficiency of the electrolysis process are guaranteed, ensuring that the hypochlorous acid solution (concentration range 100-1000ppm) and the sodium hydroxide solution (concentration range 5%-20%) meet the expected quality standards. Dynamic concentration balance: The control system monitors and adjusts product concentration in real time. When the hypochlorous acid solution concentration deviates from the ±5ppm range, or the sodium hydroxide solution concentration deviates from the ±0.1% range, the system automatically adjusts parameters such as power supply voltage, current, and electrolyte flow rate to achieve dynamic balance in product concentration, ensuring stable and reliable product quality. 3. Safety and reliability principles Equipment Safety Protection: Before the system is operational, a comprehensive inspection and maintenance of key equipment, including the electrolyzer, electrodes, ion exchange membranes, circulation pumps, and power supplies, is conducted to ensure that the equipment is fault-free, leak-free, and properly grounded. During operation, equipment parameters such as operating temperature and pressure are monitored in real time. Any abnormalities are immediately reported, and emergency measures such as shutdown are implemented to prevent equipment damage and safety accidents. Hazard Prevention and Management: Comprehensive gas collection, monitoring, and treatment equipment is in place to address the flammable, explosive, toxic, and hazardous gases, such as hydrogen and chlorine, generated during the electrolysis process. Gas collection pipelines must be well-sealed, and monitoring devices monitor gas concentrations in real time. If concentrations exceed the specified limit, ventilation and adsorption measures are immediately initiated to prevent potential safety hazards caused by gas leaks. Detailed emergency response plans are also developed, and operators are regularly organized to conduct drills to enhance their ability to respond to sudden safety incidents. 4. Principle of high efficiency and energy saving Optimizing operational efficiency: Electrolysis efficiency is improved through rationally designed electrolytic cell structure, selection of high-efficiency electrode materials, and optimization of ion exchange membrane performance. Furthermore, a recycling module is used to recycle unreacted electrolyte, reducing electrolyte waste and improving resource utilization. Generated gas is recovered and processed for secondary energy utilization, reducing overall production costs. Intelligent Energy Management: The control system intelligently adjusts parameters such as power supply power and circulating pump speed based on production needs and equipment operating status, preventing prolonged high-load or inefficient operation and reducing energy consumption. During non-production periods, equipment can be set to enter low-power standby mode to further conserve energy. 5. Green environmental protection principle Reduce pollutant emissions: In the product collection and separation module, high-efficiency separation devices are used to treat impurities and waste liquids generated during the electrolysis process, ensuring that discharged wastewater meets environmental standards. Separated solid waste is collected and properly disposed of to avoid environmental pollution. Resource recycling: Give full play to the role of the recycling module to realize the recycling of electrolyte and the recovery and reuse of gas, minimize resource waste, reduce the impact on the environment, and promote the system operation in a green and sustainable direction.

[0030] Example 2: Application in common production scenarios In ordinary production scenarios, the hypochlorous acid and sodium hydroxide co-production system of this dual-channel electrolysis water unit is applied to the disinfection and cleaning links of small processing plants, while meeting the small demand for sodium hydroxide. First, prepare the electrolyte module by transporting it. The anode water inlet pipe connected to the anode electrolyzer water inlet of the anode electrolysis channel and the cathode water inlet pipe connected to the cathode electrolyzer water inlet of the cathode electrolysis channel are connected to the storage container configured with the electrolyte. Using the flow control valve on the anode water inlet pipe and the flow control valve on the cathode water inlet pipe, the electrolyte flow rate entering the anode electrolyzer and cathode electrolyzer is adjusted to 6L / min and 7L / min respectively. At the same time, the conductivity of the electrolyte in the anode electrolyzer water is adjusted to 180μS / cm and the conductivity of the electrolyte in the cathode electrolyzer water is adjusted to 220μS / cm through the water quality regulating device to ensure that the electrolyte meets the electrolysis requirements. Next, the electrolysis module begins operation. In the anode electrolysis channel, an inert electrode serves as the anode, and a DC power supply is connected. The power supply output voltage is set to 9V and the output current is set to 6A. Under the action of the DC electric field, chloride ions lose electrons at the anode and undergo an oxidation reaction, generating chlorine gas. Simultaneously, water molecules decompose at the anode to produce oxygen and hydrogen ions. The generated chlorine gas partially dissolves in water and reacts with water to produce hypochlorous acid and hydrochloric acid. In the cathode electrolysis channel, a metal electrode serves as the cathode. Water molecules gain electrons at the cathode and undergo a reduction reaction, generating hydrogen gas and hydroxide ions. Because the anode and cathode electrolysis channels are separated by an ion exchange membrane, sodium ions in the anode electrolysis channel migrate through the ion exchange membrane to the cathode electrolysis channel, combining with the generated hydroxide ions to form sodium hydroxide, completing the electrolysis process. Then, the product collection and separation module comes into play. The first outlet pipe, connected to the outlet of the anode electrolysis channel, transports a mixed solution containing hypochlorous acid, hydrochloric acid, and small amounts of chlorine and oxygen to a collection container. A gas-liquid separator is installed at the outlet of the first outlet pipe to separate the gases. The remaining solution is further processed through a filter with a filtration accuracy of 1μm to produce a hypochlorous acid solution with a concentration of approximately 600ppm, which can be used to disinfect food processing equipment. The second outlet pipe, connected to the outlet of the cathode electrolysis channel, transports a solution containing sodium hydroxide to another collection container. After evaporation and concentration, a 12% sodium hydroxide solution is obtained, which can be used for cleaning and acid-base adjustment in food processing.

[0031] The recycling module operates continuously throughout the electrolysis process. Circulation lines are connected to the anode and cathode electrolysis channels, respectively. A circulating pump with an 18L / min flow rate circulates the electrolyte, while a 1μm filter removes impurities from the electrolyte, enabling the recycling of wastewater generated during the electrolysis process. Meanwhile, generated hydrogen, oxygen, and other gases flow through specialized gas collection lines into a recovery and processing unit for compression, storage, and other recycling processes. The controller monitors the concentration of the products in the first and second product collection containers in real time, and automatically adjusts the output voltage and current of the power supply based on the detection results to ensure the stability of the concentrations of the hypochlorous acid solution and the sodium hydroxide solution, meeting the production needs of small processing plants. Example 3: Application in high-volume demand scenarios To meet the chemical industry's demand for high production of hypochlorous acid and sodium hydroxide, this cogeneration system operates as follows: In the electrolyte delivery module, flow control valves in the anode and cathode water inlets significantly increase the electrolyte flow rates to the anode and cathode electrolyzers to 15L / min and 16L / min, respectively. Simultaneously, the electrolyte conductivity of the anode and cathode inlet water is adjusted to 250μS / cm and 300μS / cm, respectively, to provide suitable electrolyte conditions for large-scale electrolysis. When the electrolysis module is operating, the power supply output voltage is adjusted to 12V, and the output current is increased to 8A. In the anode electrolysis channel, the oxidation reaction on the inert anode proceeds violently, and a large amount of chloride ions are converted into chlorine gas, which reacts with water to produce more hypochlorous acid and hydrochloric acid; in the cathode electrolysis channel, the reduction reaction of water molecules on the metal cathode is accelerated, producing a large amount of hydrogen gas and hydroxide ions, and sodium ions quickly pass through the ion exchange membrane and combine with hydroxide ions to produce a large amount of sodium hydroxide, realizing an efficient electrolysis process; in terms of the product collection and separation module, the first water outlet pipeline transports a large amount of mixed solution to a large collection container. After the gas is separated by a high-efficiency gas-liquid separation device, the solution is treated with a filter with a filtration accuracy of 2μm, and finally a hypochlorous acid solution with a concentration of about 800ppm is obtained, and the output is greatly increased. The second outlet pipe collects the high-yield sodium hydroxide solution and then processes it through multiple-effect evaporation, crystallization and other treatment processes to obtain sodium hydroxide solid to meet the production needs of chemical companies. At this time, the concentration of the sodium hydroxide solution can reach 18% when collected. In the recycling module, the circulation pump operates at a large flow rate of 25L / min, quickly circulating the electrolyte. The filter with a filtration accuracy of 2μm promptly filters impurities to ensure the cleanliness of the electrolyte and maintain the stability of the high-yield electrolysis process. The large amount of gas generated is efficiently recycled and utilized through a professional gas recovery and treatment device, thereby improving resource utilization. The controller monitors the entire production process in real time and quickly adjusts the power supply parameters according to changes in product concentration to ensure stable product concentration under high output, meeting the high-yield demand of chemical companies for hypochlorous acid and sodium hydroxide. Example 4: Application in fine chemical demand scenarios In fine chemical production, high purity and concentration requirements for hypochlorous acid and sodium hydroxide are crucial. This co-generation system utilizes the following optimized operation: In the electrolyte delivery module, the flow control valves in the anode and cathode water inlets are precisely adjusted to maintain stable electrolyte flows of 4 L / min and 5 L / min to the anode and cathode electrolyzers, respectively. Furthermore, the electrolyte conductivity of the anode and cathode inlets is carefully adjusted to 120 μS / cm and 150 μS / cm, strictly controlling electrolyte quality. During operation, the power supply output voltage and current are set at 7 V and 4 A, ensuring a stable and gentle electrolysis process. In the anode electrolysis channel, optimized electrode materials and electrolysis conditions ensure a more complete hypochlorous acid formation reaction and minimize side reactions. In the cathode electrolysis channel, sodium ions are ensured to combine fully with hydroxide ions to produce high-purity sodium hydroxide. Furthermore, the product collection and separation module utilizes more sophisticated equipment. The gas-liquid separation device at the outlet of the first water outlet uses high-precision separation technology to ensure complete gas separation. After the mixed solution passes through a filter with a filtration accuracy of 0.5μm, it is further purified by ion exchange resin and other treatments to obtain a hypochlorous acid solution with a concentration of approximately 400ppm and extremely high purity, meeting the strict purity requirements of fine chemicals. The sodium hydroxide solution collected by the second water outlet undergoes multi-stage precision filtration and ion removal treatment, ultimately obtaining a sodium hydroxide solution with a concentration of 10% and extremely low impurity content, meeting fine chemical production standards. In the recycling module, the circulation pump operates at a flow rate of 12L / min, and the electrolyte is finely filtered by a filter with a filtration accuracy of 0.5μm, ensuring the high purity of the electrolyte, maintaining the stability of the electrolysis process and product quality. The generated gas is processed and recycled with high precision through professional purification and recovery equipment, achieving efficient resource utilization and environmental friendliness. The controller uses high-precision concentration detection equipment to accurately monitor product concentration in real time. Once a small fluctuation occurs, the power supply parameters are immediately and precisely adjusted to ensure that the concentration and purity of the hypochlorous acid solution and sodium hydroxide solution always meet the high standards of fine chemical production.

[0032] In a common production scenario, the system precisely meets the hypochlorous acid disinfection and sodium hydroxide cleaning and conditioning needs of small food processing plants. By rationally adjusting the electrolyte flow rate and conductivity, and maintaining stable electrolysis parameters, it efficiently produces hypochlorous acid and sodium hydroxide solutions of moderate concentration and reliable quality. The recycling module effectively reduces resource waste and production costs, achieving a balance between economic benefits and production needs, fully demonstrating the system's stability and practicality in small-scale production scenarios. A high-volume production scenario further highlights the system's robust performance. By significantly increasing the electrolyte flow rate and optimizing the electrolysis parameters, the system achieves efficient mass production of hypochlorous acid and sodium hydroxide. While maintaining product quality, output is significantly increased, meeting the large-scale production needs of chemical companies. Furthermore, the recycling module and intelligent control system ensure stable production processes even under high loads, demonstrating the system's reliability and efficiency for large-scale production tasks. The fine chemical demand scenario highlights the system's superior ability to produce high-quality products. By meticulously controlling various operating parameters and employing high-precision separation and purification technologies, the system produces hypochlorous acid and sodium hydroxide solutions that meet fine chemical standards in terms of purity and concentration. This not only demonstrates the system's precise control capabilities under complex process conditions, but also demonstrates its adaptability to high-end applications with stringent product quality requirements, demonstrating its broad market potential. Through the above embodiments, the hypochlorous acid and sodium hydroxide co-production system of the dual-channel water electrolysis unit of the present invention can operate stably and efficiently in a variety of scenarios by flexibly adjusting operating parameters and optimizing module collaboration, thereby achieving the co-production of hypochlorous acid and sodium hydroxide. It has outstanding characteristics such as high production efficiency, excellent product quality, high resource utilization, and a wide range of applications. It provides a reliable solution for users in different industries, has good promotion value and broad market prospects, and is of great significance to promoting the application and development of water electrolysis technology in multiple fields.

[0033] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A hypochlorous acid and sodium hydroxide co-production system of a dual-channel water electrolysis unit, characterized in that: The system includes a water electrolysis unit body, an electrolyte delivery module, an electrolysis module, a product collection and separation module, and a recycling module. The water electrolysis unit body is provided with an anode electrolysis channel and a cathode electrolysis channel, wherein: The electrolyte delivery module is used to deliver the configured electrolyte to the anode electrolysis channel and the cathode electrolysis channel respectively; an electrolysis module for performing an electrolysis process in the anode electrolysis channel and the cathode electrolysis channel; Product collection and separation module, used to collect and separate products at the outlet of the anode electrolysis channel and the cathode electrolysis channel respectively; The recycling module is used to recycle the separated gas and recycle the wastewater generated during the electrolysis process.

2. The hypochlorous acid and sodium hydroxide co-production system of a dual-channel water electrolysis unit according to claim 1, characterized in that: The anode electrolysis channel and the cathode electrolysis channel are independent of each other and separated by an ion exchange membrane.

3. The hypochlorous acid and sodium hydroxide co-production system of a dual-channel water electrolysis unit according to claim 1, characterized in that: The electrolyte transport module includes: The anode water inlet pipeline connected to the anode electrolytic cell water inlet of the anode electrolysis channel and the cathode water inlet pipeline connected to the cathode electrolytic cell water inlet of the cathode electrolysis channel together constitute the electrolyte transportation path, and the flow rate of the electrolyte entering the anode electrolysis channel and the cathode electrolysis channel are both regulated by flow control valves.

4. The hypochlorous acid and sodium hydroxide co-production system of a dual-channel water electrolysis unit according to claim 1, characterized in that: The electrolysis module comprises: In the anode electrolysis channel, an inert electrode is used as the anode. Under the action of a DC electric field, chloride ions lose electrons at the anode and undergo an oxidation reaction to generate chlorine. At the same time, water molecules decompose at the anode to generate oxygen and hydrogen ions. The generated chlorine is partially dissolved in water and reacts with water to generate hypochlorous acid and hydrochloric acid. In the cathode electrolysis channel, a metal electrode is used as the cathode. Water molecules gain electrons at the cathode and undergo a reduction reaction to generate hydrogen and hydroxide ions. The sodium ions in the anode electrolysis channel migrate to the cathode electrolysis channel through the ion exchange membrane and combine with the generated hydroxide ions to form sodium hydroxide, thereby realizing the electrolysis process in the anode electrolysis channel and the cathode electrolysis channel.

5. The hypochlorous acid and sodium hydroxide co-production system of a dual-channel water electrolysis unit according to claim 1, characterized in that: The water outlet of the anode electrolysis channel is connected to a first water outlet pipeline, and the water outlet of the cathode electrolysis channel is connected to a second water outlet pipeline. The first water outlet pipeline and the second water outlet pipeline are respectively used for product output.

6. The hypochlorous acid and sodium hydroxide co-production system of a dual-channel water electrolysis unit according to claim 5, characterized in that: The mixed solution is collected at the outlet of the first water outlet pipeline, and the gas is separated by a gas-liquid separation device, and then the solution is further processed; The solution containing sodium hydroxide is collected at the outlet of the second water outlet pipeline and processed to obtain sodium hydroxide solid or sodium hydroxide solution.

7. The hypochlorous acid and sodium hydroxide co-production system of a dual-channel water electrolysis unit according to claim 6, characterized in that: The mixed solution at least includes hypochlorous acid, hydrochloric acid and a small amount of chlorine and oxygen.

8. The hypochlorous acid and sodium hydroxide co-production system of a dual-channel water electrolysis unit according to claim 6, characterized in that: The concentration range of the sodium hydroxide solution is 5%-20%.

9. The hypochlorous acid and sodium hydroxide co-production system of a dual-channel water electrolysis unit according to claim 1, characterized in that: The separation device uses a filter with a filtration accuracy of 0.1-10 μm.

10. The hypochlorous acid and sodium hydroxide co-production system of a dual-channel water electrolysis unit according to claim 1, characterized in that: The recycling module includes a circulation pipeline, which is respectively connected to the anode electrolysis channel and the cathode electrolysis channel. The circulation pipeline is provided with a circulation pump with a flow range of 5-30L / min and a filter with a filtration accuracy of 0.5-5μm.

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