Water electrolysis hydrogen production cold mold test device and test method

Abstract

The embodiment of the invention provides a water electrolysis hydrogen production cold mold test device and method, and belongs to the technical field of water electrolysis hydrogen production. The test device comprises a gas supply system, a closed water tank and a post-treatment system which are connected in sequence, and a gas recovery pipeline and a booster pump are arranged between the post-treatment system and the closed water tank; after entering the closed water tank, nitrogen and helium generated by the gas supply system are recycled into the closed water tank after passing through the post-processing system, the gas recycling pipeline and the booster pump. According to the scheme, the water electrolysis hydrogen production equipment can be debugged and optimized under the condition of no actual electrolytic reaction, the debugging efficiency is improved, and the debugging cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogen production by electrolysis of water, and in particular to a cold model test device and a test method for hydrogen production by electrolysis of water. Background Art

[0002] As a clean and environmentally friendly hydrogen production method, water electrolysis hydrogen production technology has been widely used in the energy and chemical fields. However, before the water electrolysis hydrogen production equipment is put into operation, equipment debugging is a critical and complex link. Due to the complex transmission and separation process of hydrogen and oxygen produced during water electrolysis, the debugging process may cause gas leakage, causing hydrogen in oxygen or oxygen in hydrogen to reach dangerous values, excessive transmission resistance, uneven gas flow, etc., affecting the overall performance of the equipment.

[0003] Traditional debugging methods usually require being carried out under actual electrolysis conditions, which not only consumes a lot of electricity, but also involves complex electrochemical reactions, making it difficult to accurately debug the various performance parameters of the equipment. Summary of the invention

[0004] In order to improve the efficiency of equipment debugging and reduce the debugging cost, this plan proposes a cold model test device and test method for hydrogen production by electrolysis of water, which can simulate the gas behavior in the process of water electrolysis, so that the equipment can be debugged and parameter optimized without actual electrochemical reaction, ensuring that the equipment reaches the optimal state before actual application, while improving the equipment debugging efficiency and reducing the debugging cost.

[0005] According to a first aspect of the present invention, a cold model test device for hydrogen production by electrolysis of water is provided, comprising: a gas supply system, a closed water tank, and a post-processing system connected in sequence, a gas recovery pipeline and a booster pump being arranged between the post-processing system and the closed water tank, and nitrogen and helium generated by the gas supply system entering the closed water tank are recovered into the closed water tank after passing through the post-processing system, the gas recovery pipeline and the booster pump.

[0006] By adopting the above technical solution, the electrolyzer is replaced with a closed water tank, thereby avoiding the use of the actual electrolyzer during the commissioning process of the electrolytic water hydrogen production system, reducing the loss and wear of the electrolyzer during the commissioning process, and reducing the risk of equipment damage caused by commissioning failure. Under the premise of ensuring the commissioning effect of the system, the commissioning cost is greatly reduced. By introducing helium and nitrogen as alternative media and performing a cyclic operation, not only the consumption of helium is reduced, but also the safety of the system is improved, the direct emission of dangerous gases generated during the commissioning process of electrolytic water hydrogen production is avoided, and the environmental protection performance of the system is enhanced.

[0007] Optionally, in the cold model test device for hydrogen production by electrolysis of water provided by the present invention, the closed water tank includes a diaphragm, a temperature control system, and a pressure sensor. The diaphragm is used to divide the closed water tank into an anode side and a cathode side. The anode side and the cathode side are both provided with a liquid inlet, a liquid outlet, an air inlet, and an air outlet; the temperature control system includes a heater and a temperature sensor, which are used to adjust the operating temperature of the closed water tank; the pressure sensor is located at the bottom of the closed water tank, and is used to measure the pressure of the closed water tank.

[0008] Optionally, in the cold model test device for producing hydrogen by electrolysis of water provided by the present invention, the diaphragm is configured as a proton exchange membrane or an anion exchange membrane according to the type of electrolyte.

[0009] By adopting the above technical solution, the anode side and the cathode side can be effectively separated by the diaphragm, which is suitable for different types of electrolytes, so that the equipment can flexibly adapt to different experimental needs.

[0010] Optionally, in the cold model test device for hydrogen production by electrolysis of water provided by the present invention, the gas supply system includes a nitrogen supply unit and a helium supply unit, which are respectively used to generate nitrogen for simulating the production of oxygen by hydrogen production by electrolysis of water and helium for simulating the production of hydrogen by hydrogen production by electrolysis of water. The nitrogen and helium are respectively introduced into the anode side and cathode side of the closed water tank.

[0011] Optionally, in the cold model test device for hydrogen production by electrolysis of water provided by the present invention, the nitrogen supply unit and the helium supply unit both include a filter, a gas mass flow meter and a pressure regulating valve, and the gas mass flow meter and the pressure regulating valve are used to control the molar ratio of nitrogen and helium respectively introduced into the anode side and cathode side of the closed water tank to be 1:2.

[0012] By adopting the above technical solution, the use and flow control of nitrogen and helium can accurately simulate the real working environment of producing oxygen and hydrogen during the electrolysis of water to produce hydrogen. At the same time, due to their inertness, they help reduce possible safety risks in the reaction process and improve the safety of the experiment.

[0013] Optionally, in the cold model test device for producing hydrogen by electrolysis of water provided by the present invention, the gas recovery pipeline is configured as a variable diameter pipeline to reduce the flow rate and pressure of nitrogen and helium.

[0014] Optionally, in the cold model test device for hydrogen production by electrolysis of water provided by the present invention, a gas sampling tube is provided at the connection between the tail pipe of the post-processing system and the closed water tank, for detecting the ratio of helium in nitrogen or the ratio of nitrogen in helium during operation.

[0015] By adopting the above technical solution, the ratio of helium in nitrogen or nitrogen in helium can be monitored in real time through the gas sampling tube to ensure that the gas composition during the reaction is in line with expectations.

[0016] Optionally, in the cold model test device for producing hydrogen by electrolysis of water provided by the present invention, the post-processing system includes a circulation pump for starting the circulation of nitrogen and helium.

[0017] Optionally, in the cold model test device for hydrogen production by electrolysis of water provided by the present invention, the post-processing system is integrated with the main control system, and the main control system is used to monitor and adjust the gas input process in real time, complete the debugging and optimization of the instruments and valves of the post-processing system, and record the pressure, flow and temperature data during the debugging process.

[0018] By adopting the above technical solution, the main control system can centrally monitor the entire simulated water electrolysis hydrogen production process, including key parameters such as gas input, pressure, flow and temperature, thereby improving the overall management efficiency of the system.

[0019] According to a second aspect of the present invention, a cold model test method for hydrogen production by electrolysis of water is provided, which is performed based on the cold model test device for hydrogen production by electrolysis of water described in the first aspect of the present invention, and the method comprises: opening a liquid inlet of a closed water tank, and introducing electrolyte until a specified water level of a post-processing system is reached; starting a circulating pump of the post-processing system, and turning on a heater of the closed water tank to heat the electrolyte to a preset temperature; opening a gas supply system to introduce nitrogen to the anode side of the closed water tank, and helium to the cathode side, and recovering the exhausted helium and nitrogen into the closed water tank through a gas recovery pipeline and a booster pump, and adjusting the pressure of nitrogen and helium during operation to reach a target working pressure; when the pressure of nitrogen and helium reaches the target operating pressure, debugging the instruments and valves of the post-processing system.

[0020] In summary, the cold model test device and test method of the water electrolysis hydrogen production equipment provided by the present invention can at least achieve the following beneficial effects: 1. The electrolyzer is replaced with a sealed water tank, thereby avoiding the use of the actual electrolyzer during the commissioning of the electrolytic water hydrogen production system, reducing the loss and wear of the electrolyzer during the commissioning process, and reducing the risk of equipment damage caused by commissioning failure. Under the premise of ensuring the system commissioning effect, the commissioning cost is greatly reduced.

[0021] 2. The presence of the diaphragm makes the simulated water electrolysis environment closer to the actual working conditions of the electrolyzer, providing a reliable data basis for debugging; by introducing helium and nitrogen as alternative media and performing cyclic operations, it not only reduces the consumption of helium, but also improves the safety of the system, avoids the direct emission of hazardous gases generated during the debugging process of water electrolysis and hydrogen production, and enhances the environmental performance of the system.

[0022] 3. It can accurately simulate the gas generation during water electrolysis, improve the control accuracy of gas distribution, and help optimize gas flow and pressure during the experimental stage, thereby achieving more precise equipment performance adjustment.

[0023] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings: Figure 1 It shows a schematic structural diagram of a cold model test device for producing hydrogen by electrolysis of water according to an embodiment of the present invention; Figure 2 A schematic diagram of the internal structure of a closed water tank according to an embodiment of the present invention is shown; Figure 3 A schematic flow chart of a cold model test method 300 for producing hydrogen by electrolysis of water according to an embodiment of the present invention is shown; Figure 4 A process flow chart of a cold model test method for producing hydrogen by electrolysis of water according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0025] An ideal cold model test device can accurately test the performance indicators of the equipment by simulating the generation and transmission process of electrolytic water gas, ensuring that the equipment reaches the best state when it is put into operation. This solution provides a cold model test device and test method for hydrogen production by electrolysis of water, which can be debugged and optimized without actual electrolysis reaction, improve debugging efficiency, and reduce debugging costs and safety risks.

[0026] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0027] Figure 1 The schematic diagram of the structure of the cold model test device for electrolyzing water to produce hydrogen according to one embodiment of the present invention is shown. Figure 1As shown, the device includes a gas supply system, a closed water tank and a post-processing system connected in sequence. A gas recovery pipeline and a booster pump are arranged between the post-processing system and the closed water tank. The nitrogen and helium generated by the gas supply system enter the closed water tank and are recovered into the closed water tank after passing through the post-processing system, the gas recovery pipeline and the booster pump, thereby forming a nitrogen circulation system and a helium circulation system.

[0028] Among them, the closed water tank is used to replace the electrolyzer, which can withstand the designed operating pressure of the hydrogen production system. The nitrogen and helium provided by the gas supply system are used to simulate the oxygen and hydrogen produced by the water electrolysis hydrogen production equipment, respectively. By replacing the electrolyzer with a closed water tank, the use of the actual electrolyzer is avoided during the commissioning of the water electrolysis hydrogen production system, the loss and wear of the electrolyzer during the commissioning process are reduced, and the risk of equipment damage caused by commissioning failure is reduced. While ensuring the system commissioning effect, the commissioning cost is greatly reduced. By introducing helium and nitrogen as alternative media and performing a circulating operation, not only the consumption of helium is reduced, but also the safety of the system is improved, the direct discharge of hazardous gases generated during the commissioning of water electrolysis hydrogen production is avoided, and the environmental protection performance of the system is enhanced.

[0029] Figure 2 FIG. 2 shows a schematic diagram of the internal structure of a closed water tank according to an embodiment of the present invention. Figure 2 As shown, the closed water tank includes a diaphragm, a temperature control system, and a pressure sensor. The temperature control system includes a heater and a temperature sensor for adjusting the operating temperature of the closed water tank. The pressure sensor is located at the bottom of the closed water tank and is used to measure the pressure of the closed water tank. The diaphragm is used to divide the closed water tank into a cathode side and an anode side. Both the anode side and the cathode side are provided with a liquid inlet, a liquid outlet, an air inlet, an air outlet, a heater, a temperature sensor, and a pressure sensor. The electrolyte is introduced into the liquid inlet, and compressed nitrogen and helium are introduced into the air inlet. The diaphragm can select a proton exchange membrane or an anion exchange membrane according to the type of electrolyte.

[0030] The gas supply system includes a nitrogen supply unit and a helium supply unit, which are used to generate nitrogen for simulating oxygen generated by water electrolysis hydrogen production equipment and helium for simulating hydrogen generated by water electrolysis hydrogen production equipment, respectively. Nitrogen and helium are respectively introduced into the anode side and cathode side of the closed water tank. Both the nitrogen supply unit and the helium supply unit include a filter, a gas mass flow meter and a pressure regulating valve, and the purity of the introduced gas is ensured by gas filtration. The gas mass flow meter and the pressure regulating valve are used to control the molar ratio of nitrogen and helium introduced into the anode side and cathode side of the closed water tank to 1:2, thereby simulating the real working environment of the electrolyzer.

[0031] The gas recovery pipeline is set as a variable diameter pipeline to reduce the flow rate and pressure of nitrogen and helium. For example, a tapered pipeline can be used to reduce the gas flow rate, thereby reducing the pressure drop, and a larger pipe diameter can be used at the outlet of the pipeline to improve the nitrogen and helium recovery efficiency and optimize the circulation process.

[0032] A gas sampling tube is installed at the connection between the tail pipe of the post-processing system and the closed water tank to detect the ratio of helium in nitrogen or the ratio of nitrogen in helium during operation. The post-processing system includes a circulation pump to start the circulation of nitrogen and helium. The post-processing system is integrated with the main control system, which is used to monitor and adjust the gas input process in real time, complete the debugging and optimization of the instruments and valves of the post-processing system, and record the pressure, flow and temperature data during the debugging process.

[0033] Figure 3 FIG. 3 is a flow chart of a cold model test method 300 for producing hydrogen by electrolysis of water according to an embodiment of the present invention. Figure 3 As shown, first in step S310, the liquid inlet of the sealed water tank is opened, and the electrolyte is introduced until the specified water level of the post-treatment system is reached.

[0034] Then in step S320, the circulation pump of the post-treatment system is turned on, and the heater of the closed water tank is turned on to heat the electrolyte to a preset temperature, that is, the temperature required for system operation.

[0035] Then in step S330, the gas supply system is opened to introduce nitrogen into the anode side of the closed water tank and helium into the cathode side. The exhausted helium and nitrogen are pressurized and recovered into the closed water tank through the gas recovery pipeline and the booster pump. The pressure of nitrogen and helium is adjusted during operation to reach the target working pressure.

[0036] Finally, in step S340, when the pressures of nitrogen and helium reach the target operating pressures, the instruments and valves of the post-processing system are debugged.

[0037] Figure 4 The process flow chart of the cold model test method for producing hydrogen by electrolysis of water according to one embodiment of the present invention is shown. Figure 3 Further explanation: Before the test begins, check the air tightness and leakage of the entire test device to ensure safe operation during system operation. First, open the water inlet of the HE-BV03 and HE-BV04 sealed water tanks, close HE-BV01 and HE-BV02, continue to flow water to the specified water level of the post-treatment system, then stop the water supply and close HE-BV03 and HE-BV04.

[0038] Turn on the circulation pump of the post-treatment system and at the same time turn on the heater of the closed water tank to heat the water to the temperature of 90C required for system operation.

[0039] Open the nitrogen and helium valves HE-BV05 and HE-BV06 as well as the HE-BV01 and HE-BV02 valves, and introduce nitrogen into the anode side and helium into the cathode side. According to the two gas mass flow meters, the ratio of nitrogen and helium introduced is controlled on the control interface of the control system. The molar ratio of nitrogen and helium introduced into the anode and cathode sides of the closed water tank is 1:2, so as to simulate the gas transmission inside the device during the actual operation of the electrolyzer.

[0040] Open the tail pipe to pressurize and recover the exhausted nitrogen and helium and circulate them into the closed water tank. When the system operating pressure reaches 3.5MPa, close the HE-BV05 and HE-BV06 valves.

[0041] By monitoring the changes in temperature, pressure, flow and other parameters, the helium content in nitrogen and the nitrogen content in helium are detected simultaneously, and the debugging and optimization of the instruments and valves of the post-processing system are completed.

[0042] Compared with the prior art, the cold model test device and test method of the water electrolysis hydrogen production equipment provided by the present invention can at least achieve the following beneficial effects: 1. The electrolyzer is replaced with a sealed water tank, thereby avoiding the use of the actual electrolyzer during the commissioning of the electrolytic water hydrogen production system, reducing the loss and wear of the electrolyzer during the commissioning process, and reducing the risk of equipment damage caused by commissioning failure. Under the premise of ensuring the system commissioning effect, the commissioning cost is greatly reduced.

[0043] 2. The presence of the diaphragm makes the simulated water electrolysis environment closer to the actual working conditions of the electrolyzer, providing a reliable data basis for debugging; by introducing helium and nitrogen as alternative media and performing cyclic operations, it not only reduces the consumption of helium, but also improves the safety of the system, avoids the direct emission of hazardous gases generated during the debugging process of water electrolysis and hydrogen production, and enhances the environmental performance of the system.

[0044] 3. It can accurately simulate the gas generation during water electrolysis, improve the control accuracy of gas distribution, and help optimize gas flow and pressure during the experimental stage, thereby achieving more precise equipment performance adjustment.

[0045] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0046] Unless otherwise specified, the use of ordinal numbers "first", "second", "third", etc. to describe common objects merely indicates that different instances of similar objects are involved and is not intended to imply that the objects so described must have a given order in time, space, order or in any other manner.

[0047] Although the present invention has been described according to a limited number of embodiments, it will be apparent to those skilled in the art, with the benefit of the above description, that other embodiments may be envisioned within the scope of the invention thus described. It should be noted that the language used in this specification is primarily selected for readability and instructional purposes, rather than for the purpose of explaining or limiting the subject matter of the present invention.

Claims

1. A cold model test device for hydrogen production by electrolysis of water, characterized in that: include: A gas supply system, a closed water tank, and a post-processing system are connected in sequence, and a gas recovery pipeline and a booster pump are arranged between the post-processing system and the closed water tank. After the nitrogen and helium generated by the gas supply system enter the closed water tank, they are recovered into the closed water tank after passing through the post-processing system, the gas recovery pipeline and the booster pump.

2. The cold model test device for hydrogen production by electrolysis of water according to claim 1, characterized in that: The closed water tank includes a diaphragm, a temperature control system, and a pressure sensor. The diaphragm is used to divide the closed water tank into an anode side and a cathode side. The anode side and the cathode side are both provided with a liquid inlet, a liquid outlet, an air inlet, and an air outlet; the temperature control system includes a heater and a temperature sensor, which are used to adjust the operating temperature of the closed water tank; the pressure sensor is located at the bottom of the closed water tank, and is used to measure the pressure of the closed water tank.

3. The cold model test device for hydrogen production by electrolysis of water according to claim 2, characterized in that: The separator is configured as a proton exchange membrane or an anion exchange membrane according to the type of electrolyte.

4. The cold model test device for hydrogen production by electrolysis of water according to claim 1, characterized in that: The gas supply system includes a nitrogen supply unit and a helium supply unit, which are respectively used to generate nitrogen for simulating oxygen generated by water electrolysis hydrogen production equipment and helium for simulating hydrogen generated by water electrolysis hydrogen production equipment. The nitrogen and helium are respectively introduced into the anode side and cathode side of the closed water tank.

5. The cold model test device for hydrogen production by electrolysis of water according to claim 4, characterized in that: The nitrogen supply unit and the helium supply unit both include a filter, a gas mass flow meter and a pressure regulating valve, and the gas mass flow meter and the pressure regulating valve are used to control the molar ratio of nitrogen and helium respectively introduced into the anode side and the cathode side of the closed water tank to be 1:

2.

6. The cold model test device for hydrogen production by electrolysis of water according to claim 1, characterized in that: The gas recovery pipeline is configured as a variable diameter pipeline to reduce the flow rate and pressure of nitrogen and helium.

7. The cold model test device for hydrogen production by electrolysis of water according to claim 1, characterized in that: A gas sampling tube is provided at the connection between the tail exhaust pipe of the post-processing system and the closed water tank, which is used to detect the ratio of helium in nitrogen or the ratio of nitrogen in helium during operation.

8. The cold model test device for hydrogen production by electrolysis of water according to claim 1, characterized in that: The post-processing system comprises a circulation pump for starting the circulation of nitrogen and helium.

9. The cold model test device for hydrogen production by electrolysis of water according to claim 1, characterized in that: The post-processing system is integrated with the main control system, which is used to monitor and adjust the gas input process in real time, complete the debugging and optimization of the instruments and valves of the post-processing system, and record the pressure, flow and temperature data during the debugging process.

10. A cold model test method for producing hydrogen by electrolysis of water, characterized in that: Based on the cold model test device for hydrogen production by electrolysis of water described in any one of claims 1 to 9, the method comprises: Opening the liquid inlet of the sealed water tank, and introducing electrolyte until the water level reaches the specified level of the post-treatment system; Turning on the circulation pump of the post-treatment system and turning on the heater of the sealed water tank to heat the electrolyte to a preset temperature; Open the gas supply system to introduce nitrogen into the anode side of the closed water tank and helium into the cathode side, recover the exhausted helium and nitrogen into the closed water tank through the gas recovery pipeline and the booster pump, and adjust the pressure of nitrogen and helium during operation to reach the target working pressure; When the pressures of nitrogen and helium reach the target operating pressures, the instruments and valves of the post-processing system are debugged.

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