Modularized PEM electrolytic bath system

Abstract

The invention discloses a cabinet type modular electrolytic cell system and a preparation method thereof. The system is specially designed for large-scale production of green hydrogen. And through the modular design, the characteristics of high-efficiency assembly, high expandability and simplicity and convenience in maintenance are realized. And the electrolytic cell unit assembly is stably arranged in the special cabinet frame through a detachable connecting structure to form a smooth electrolyte circulating passage and a gas leading-out passage. And each electrolytic cell unit assembly is formed by sequentially arranging and combining an electrode plate group, an ion exchange diaphragm and a stable frame, so that efficient implementation of electrolytic reaction is ensured. The system adopts a built-in pipeline layout and is ingeniously hidden in a cabinet frame structure, various hidden dangers possibly caused by pipeline exposure are avoided, and the overall layout is more regular. Meanwhile, due to the design of the detachable connecting structure, all the units are stably connected and conveniently and rapidly disassembled and assembled, and operation and maintenance time consumption is greatly reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of green hydrogen industrial production, and in particular relates to an expandable electrolyzer assembly system for large-scale production of green hydrogen and a preparation method thereof. The system achieves the characteristics of efficient assembly, strong scalability, and easy maintenance through modular design, and is suitable for the needs of large-scale industrial production of green hydrogen. Background Art

[0002] With the increasing global demand for renewable and clean energy, green hydrogen production technology has become a hot topic of research. Traditional electrolyzer systems have problems such as low assembly efficiency, poor scalability, and difficult maintenance, which makes it difficult to meet the needs of large-scale industrial production. Therefore, it is urgent to develop an efficient, scalable, and easy-to-maintain electrolyzer assembly system.

[0003] As a clean energy, green hydrogen has broad application prospects, especially in reducing greenhouse gas emissions and promoting energy structure transformation. However, the current production capacity of green hydrogen is still very limited, and it is necessary to develop efficient and scalable production systems to meet future needs.

[0004] Traditional electrolyzer systems have many deficiencies in assembly efficiency, scalability and maintenance, making them difficult to adapt to the needs of large-scale industrial production. For example, the PEM electrolyzer assembly process is complex, requiring multiple steps and sophisticated equipment, resulting in low assembly efficiency and high costs.

[0005] The development of an efficiently assembled large-scale modular electrolyzer system first requires modular design to ensure the system's efficiency, scalability, and ease of maintenance. Summary of the invention

[0006] In view of the fact that the existing electrolytic cells still have deficiencies in terms of integration, installation and maintenance convenience, and safety, the present invention specially introduces a cabinet-type modular electrolytic cell, aiming to overcome the above-mentioned problems.

[0007] To achieve the above objectives, the present invention uses the following technical solutions: A cabinet-type modular electrolyzer comprises: an intelligent detection system, a precise control system and an electrolyzer unit assembly. The electrolyzer unit assembly is in multiple numbers and is securely placed inside a special cabinet frame by means of a detachable connection structure, thereby constructing a smooth electrolyte circulation passage and a gas outlet passage.

[0008] The electrolytic cell unit assembly is composed of a tightly fitted electrode plate group, an ion exchange membrane and a stable frame arranged in sequence. The electrode plate group is subdivided into anode plates and cathode plates, and the electrolysis working area is precisely defined between the two plates to ensure efficient implementation of the electrolysis reaction.

[0009] One end of the stable frame is cleverly designed with a joint gas and electrolyte discharge port, and the other end is equipped with a dedicated electrolyte inlet interface to meet the needs of stable electrolyte circulation and orderly gas discharge. Both the electrolyte circulation path and the gas outlet path adopt a built-in pipeline layout, which is cleverly hidden in the cabinet frame structure, avoiding various hidden dangers that may be caused by exposed pipelines, making the overall layout more regular.

[0010] The detachable connection structure includes slot-type connectors and bolt-fastening components, which can not only ensure the stable connection of each unit, but also facilitate quick disassembly and assembly, greatly reducing the time spent on operation and maintenance.

[0011] The cabinet frame is arranged in a regular array inside according to standardized module specifications to accommodate multiple compartments for accommodating electrolytic cell unit components, which meets the requirements of large-scale industrial production and flexible configuration.

[0012] Compared with traditional electrolytic equipment, the newly created cabinet-type modular electrolytic cell of the present invention has obvious advantages. It cleverly integrates many independently operable electrolytic units into a standardized cabinet frame system, and then efficiently connects each cabinet frame in parallel mode, which not only effectively reduces the equipment purchase and assembly costs, but also can quickly locate and replace the faulty unit when the equipment fails suddenly, greatly shortening the inspection and maintenance time; more importantly, with a strict sealing design and independent gas-liquid passages, it completely eliminates the potential explosion crisis caused by the mixture of hydrogen and oxygen, and comprehensively enhances the safety and stability of the overall device operation, laying a solid foundation for the efficient and smooth advancement of the electrolytic process. The purpose of the invention is to provide an efficiently assembled cabinet-integrated modular electrolytic cell system and its preparation method, so as to solve the problems of low assembly efficiency, poor scalability, and difficult maintenance of the electrolytic cell system in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 : Schematic diagram of the structure of the modular electrolyzer system.

[0014] Figure 2 : Schematic diagram of a single cell of the modular electrolyzer system.

[0015] Figure 3: Schematic diagram of the cabinet support frame of the modular electrolyzer system.

[0016] The above drawings include the following reference numerals: 10. Cabinet; 11. Single electrolysis unit; 21. Liquid inlet manifold; 22. Hydrogen outlet; 23. Oxygen outlet; 24. Single electrolysis unit assembly buckle; 31. Single electrolysis unit assembly track; 32. Integrated system liquid manifold; 33. Integrated system hydrogen manifold; 34. Integrated system oxygen manifold; 36. Liquid branch quick connector; 37. Hydrogen branch quick connector; 38. Oxygen branch quick connector; DETAILED DESCRIPTION

[0017] 1. Preliminary preparation Procurement of materials and components: Based on the design plan, we accurately purchase special electrode plate groups to ensure that the anode plate is made of materials with high catalytic activity and strong corrosion resistance, such as platinum metal coated titanium plate, and the cathode plate is made of materials with low hydrogen evolution overpotential; the ion exchange diaphragm uses perfluorosulfonic acid membrane with high proton exchange efficiency and excellent chemical stability; the stable frame is injection molded with high-strength and good insulating engineering plastics, and the slot-type connectors, bolt fastening components, sealing kits and other components of the detachable connection structure are all customized according to strict standards to ensure that they meet the cabinet frame specifications.

[0018] Cabinet frame customization and assembly: According to the planned array layout requirements, the cabinet frame is customized. The main frame is made of rust-proof and load-bearing metal material. The welding and riveting processes are used to ensure the stability of the structure. The interior is accurately divided into multiple standard compartments. Each compartment has reserved installation points for docking with the electrolyzer unit components and grooves for built-in pipe passages to facilitate subsequent installation.

[0019] 2. Electrolyzer unit assembly Installation of electrode plate group and diaphragm: In a clean dust-free workshop environment, professional technicians first spread the ion exchange diaphragm flat on the operating table, and then accurately place the anode plate and cathode plate on both sides of the diaphragm in a predetermined order. Positioning fixtures are used to ensure that the electrode plate and diaphragm fit tightly and are accurately positioned to prevent deviation and wrinkles. After assembly, a preliminary electrical performance test is carried out to ensure that the electrolysis area is formed normally and there is no short circuit risk.

[0020] Stable frame packaging: carefully move the assembled electrode plate group and diaphragm into the stable frame mold, and use the injection molding secondary molding process to make the frame and the edge of the electrode plate group seamlessly connected, or use sealant to seal and fix; at the same time, accurately install the joint gas and electrolyte discharge port on one side of the frame, and firmly connect the special electrolyte inlet interface on the other side. Sealing gaskets are installed at the interfaces to prevent leakage. The assembled electrolytic cell unit components are also subject to pressure resistance and airtightness tests to ensure that the quality is up to standard.

[0021] 3. Overall assembly of cabinet-type modular electrolyzer Unit assembly into the cabinet: Move the qualified electrolytic cell unit assembly to the cabinet frame, and with the help of lifting equipment or manual assistance, slowly slide the unit assembly along the guide rail or slot of the cabinet frame into the corresponding compartment, and initially position it through the slot-type connector. After adjusting the position, use bolts to fasten the assembly and tighten it according to the specified torque to firmly fix the unit assembly to the cabinet frame to ensure the stability of the connection and good electrical conductivity.

[0022] Gas-liquid pathway connection and sealing: According to the built-in pipeline layout design, acid-, alkali-, and corrosion-resistant flexible pipelines are used to connect the electrolyte inlet and outlet ports of each electrolytic cell unit assembly in series in sequence to build a complete electrolyte circulation pathway; the gas export pathway is connected through a dedicated air pipe, and sealant is applied to the air pipe interface. The pipeline is fixed to the cabinet frame groove with pipe clamps along the way; the sealing condition is carefully checked throughout the process, and the sealing kit is checked for leaks and repaired to eliminate the risk of gas and liquid leakage.

[0023] 4. System debugging and testing Electrical system debugging: Before connecting to the external power supply, recheck the circuit connections between the electrolytic cell unit components and the control system, use professional electrical testing instruments to measure key parameters such as line resistance and insulation resistance, and after confirmation, gradually load the rated voltage, observe the polarization phenomenon and current distribution of each electrode plate, and fine-tune the control system parameters to ensure that the current is stable and the voltage is balanced during the electrolysis process to meet the process requirements.

[0024] Gas-liquid system test: inject an appropriate amount of simulated electrolyte into the electrolyte circulation path, start the circulation pump, check the pump body operation status, pipeline pressure, flow conditions, and check for leaks and blockages; the gas export path simulates the gas production process by injecting inert gas, and uses a gas detector to monitor the gas flow rate and concentration at the exhaust port to verify that the gas path is unobstructed and the sealing is up to standard; simultaneously start the intelligent detection system and calibrate the sensor to enable it to accurately monitor various gas and liquid parameters to provide data support for subsequent stable operation.

[0025] 5. Daily operation and maintenance Operation monitoring: During normal operation of the equipment, a dedicated person is arranged to be on duty in the monitoring room and pay real-time attention to the feedback data from the intelligent detection system, including electrolyte temperature, pH, conductivity, gas output, purity and other indicators; once abnormal fluctuations are found, they are immediately compared with historical data, the cause of the fault is checked, and the operating parameters are remotely adjusted with the help of the control system to try to restore normal operating conditions.

[0026] Regular maintenance: formulate a maintenance plan based on the equipment's operating hours and the severity of the working conditions. Regularly shut down the equipment to disassemble some electrolytic cell unit components, check the corrosion and wear of the electrode plates, and replace damaged plates and diaphragms in a timely manner; clean the dust and crystals inside the cabinet frame, check the tightness of the detachable connection structure, and replace aging seals as needed; repeat the system debugging process after each maintenance to ensure that the equipment performs as well as before and operates safely and stably.

[0027] Through the above rigorous and detailed specific implementation methods, the cabinet-type modular electrolyzer can be efficiently assembled from scattered components into practical equipment with excellent performance, safety and reliability, meeting the needs of industrial electrolysis production and giving full play to its advantages in cost control, operation and maintenance convenience and safety.

Claims

1. A cabinet-type modular electrolyzer system, characterized in that: It includes an intelligent detection system, a precise control system and a plurality of electrolytic cell unit components; the electrolytic cell unit components are firmly placed inside a special cabinet frame through a detachable connection structure to form a smooth electrolyte circulation passage and a gas outlet passage.

2. According to the cabinet-type modular electrolytic cell system of claim 1, the electrolytic cell unit assembly is composed of an electrode plate group, an ion exchange membrane and a stable frame arranged in sequence; the electrode plate group includes an anode plate and a cathode plate, and the electrolysis working area is precisely defined between the two plates.

3. According to claim 1 or 2, the cabinet-type modular electrolyzer system, wherein the detachable connection structure includes a slot-type connector and a bolt fastening assembly, which can not only ensure the stable connection of each unit, but also facilitate rapid disassembly and assembly.

4. A cabinet-type modular electrolyzer system according to any one of the claims, wherein the cabinet frame is in accordance with standardized module specifications, and a plurality of compartments for accommodating electrolyzer unit components are distributed in a regular array inside.

5. According to the cabinet-type modular electrolyzer system described in any one of the claims, the electrolyte circulation passage and the gas outlet passage both adopt a built-in pipeline layout and are cleverly hidden in the cabinet frame structure.

6. The cabinet-type modular electrolyzer system according to any one of the claims has a strict sealing design and an independent gas-liquid passage, which completely eliminates the potential explosion risk caused by the mixture of hydrogen and oxygen.

7. A method for preparing the cabinet-type modular electrolyzer system according to any one of claims 1 to 6, characterized in that: It includes the steps of preliminary preparation, assembly of electrolyzer unit components, overall assembly of cabinet-type modular electrolyzer, system debugging and testing, and daily operation and maintenance.

8. The method according to claim 7, wherein the preliminary preparation includes material and component procurement and cabinet frame customization and assembly.

9. The method according to claim 7 or 8, wherein the electrolytic cell unit assembly comprises the installation of the electrode plate group and the diaphragm and the stable frame packaging.

10. The method according to any one of claims 7 to 9, wherein the overall assembly of the cabinet-type modular electrolyzer includes placing the unit components into the cabinet and connecting and sealing the gas-liquid passages.

11. Through the above claims, the present invention protects a cabinet-type modular electrolyzer system and a preparation method thereof, which has the characteristics of efficient assembly, strong scalability, and easy maintenance, and is suitable for the needs of large-scale industrial production of green hydrogen.

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