PEM anti-misconnection hydrogen production system, method and equipment

Abstract

The invention relates to a PEM anti-misconnection hydrogen production system, method and equipment, and relates to the field of hydrogen energy preparation. According to the technical scheme, whether the positive electrode and the negative electrode of the PEM electrolytic cell are reversely connected or not can be verified at the initial stage of PEM electrolytic hydrogen production, the situation that the reverse connection problem is difficult to find at the early stage in the past is changed, and the safety and the reliability of the hydrogen production process are greatly improved; secondly, when full-load hydrogen production is not achieved, potential safety hazards can be reduced to the minimum through the early verification mechanism, serious consequences such as equipment damage and explosion possibly caused by reverse connection of the positive electrode and the negative electrode are avoided, and personnel and property safety is guaranteed; furthermore, the scheme does not influence the original design, which means that the scheme can be applied without large-scale transformation on the basis of the existing PEM electrolytic hydrogen production system, so that the technology upgrading cost and difficulty are reduced; in addition, whether the positive electrode and the negative electrode are reversely connected or not is judged by fully utilizing the characteristic that the hydrogen yield is larger than the oxygen yield, and the misconnection prevention function is ingeniously and efficiently achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen production, and particularly to a PEM anti-misconnection hydrogen production system, method and equipment. Background Art

[0002] In the industrial application of PEM electrolyzers, the problem of reverse connection of the positive and negative electrodes has long existed and has not been fundamentally solved. The current mainstream prevention means in the industry rely on physical markings (such as terminal color markings, text annotations) and manual operation specifications, but there are significant defects: the markings are prone to failure due to oil stains, wear or fading in a complex environment, and technicians may still misconnect the electrodes due to fatigue or operational negligence even after training. More critically, the existing measures can only rely on pre-prevention and cannot actively detect the reverse connection state and intervene immediately in the initial stage of system operation. For example, statistics of a large-scale hydrogen energy project show that equipment failures caused by reverse connection account for 12.7%, and 63% of the accidents occur during the system commissioning stage, revealing the unreliability of the marking-dependent scheme.

[0003] When the PEM electrolyzer is accidentally connected in reverse, a series of chain failure mechanisms will be triggered: the reaction that should generate oxygen on the anode side is replaced by hydrogen, resulting in an excessive concentration of local hydrogen-oxygen mixed gas and posing an explosion risk; the reverse current forces protons to migrate reversely, damaging the chemical stability of the proton exchange membrane, and at the same time, the titanium-based anode material accelerates corrosion in the hydrogen evolution environment. Experimental data show that the electrode corrosion rate increases by 8 times after 30 minutes of reverse connection; since the catalytic activity of the anode catalyst for the hydrogen evolution reaction is only 1 / 10 of that of the cathode, the current density cannot exceed 35% of the rated value, causing energy waste. More seriously, the existing system lacks the ability to give early warnings of reverse connection. A literature report shows that a certain electrolyzer was not discovered until it had been operating in reverse for 4 hours. At this time, the membrane electrode had suffered irreversible damage, and the maintenance cost was as high as 60% of the original value of the equipment. This delay not only causes economic losses but may also trigger catastrophic accidents such as fires or explosions due to the accumulation of hydrogen-oxygen mixed gas. Summary of the Invention

[0004] The purpose of the present invention is to provide a PEM anti-misconnection hydrogen production system, method and equipment to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows: In the first aspect, the present invention provides a PEM anti-misconnection hydrogen production system, and the system includes: A pure water pump, whose input end is connected to the output end of a pure water tank, and whose output end is respectively connected to the first input end of an oxygen separator and the first end of a first flow meter; A pure water circulation pump, whose input end is connected to the output end of the oxygen separator, and whose output end is connected to the first end of a second flow meter; and The PEM electrolyzer has its input end connected to the second end of the second flowmeter. Its oxygen-water mixed output end is connected to the second input end of the oxygen separator through an oxygen measurement pipe. Its hydrogen-water mixed output end and the second end of the first flowmeter are both connected to the input end of the hydrogen separator through a hydrogen measurement pipe. The output end of the hydrogen separator is connected to the input end of the pure water tank. The oxygen separator also has an oxygen outlet end, and the hydrogen separator also has a hydrogen outlet end. Wherein, a first valve is arranged between the output end of the pure water pump and the first input end of the oxygen separator. Second valves and third valves are respectively arranged on both sides of the first flowmeter. Fourth valves and fifth valves are respectively arranged on both sides of the second flowmeter.

[0006] In a possible implementation manner, the oxygen measurement pipe and the hydrogen measurement pipe have the same specification size.

[0007] In a possible implementation manner, a pure water cooler is arranged between the output end of the oxygen separator and the input end of the pure water circulation pump.

[0008] In a possible implementation manner, an ion filter is arranged between the output end of the pure water circulation pump and the first end of the second flowmeter.

[0009] In a possible implementation manner, the PEM electrolyzer is electrically connected to a hydrogen production power supply.

[0010] In a possible implementation manner, the PEM anti-misconnection hydrogen production system further includes a control cabinet connected to each component.

[0011] In a second aspect, the present invention provides a PEM anti-misconnection hydrogen production method. The method is applied to the PEM anti-misconnection hydrogen production system as described above. The method includes: Start the pure water circulation pump through the control cabinet, open the first valve, the fourth valve, and the fifth valve, close the second valve and the third valve, and fill the PEM electrolyzer with water. Close the first valve through the control cabinet, open the second valve, the third valve, the fourth valve, and the fifth valve, and control the opening degrees of the second valve, the third valve, the fourth valve, and the fifth valve so that the water flow rates on the hydrogen side and the oxygen side measured by the first flowmeter and the second flowmeter are the same and the water flow rate is within a preset normal working range. Start the hydrogen production power supply through the control cabinet, and the PEM electrolyzer starts to produce hydrogen. Judge the magnitudes of the first pressure at the hydrogen measurement pipe and the second pressure at the oxygen measurement pipe. If the first pressure is greater than the second pressure, close the second valve and the third valve through the control cabinet, and open the first valve. The PEM anti-misconnection hydrogen production system enters a safe operation state. If the first pressure is less than the second pressure, the hydrogen production power supply is turned off through the control cabinet, the PEM electrolyzer stops hydrogen production, and it is checked whether the positive and negative electrodes of the PEM electrolyzer are connected reversely.

[0012] In a third aspect, the present invention provides a computer device, characterized in that the computer device includes a processor and a memory, and at least one instruction, at least one program, a code set or an instruction set is stored in the memory, and the at least one instruction, at least one program, the code set or the instruction set is loaded and executed by the processor to implement the above-mentioned PEM anti-misconnection hydrogen production method.

[0013] The beneficial effects brought by the technical solution provided by the present invention at least include: This technical solution can verify whether the positive and negative electrodes of the PEM electrolyzer are connected reversely at the initial stage of PEM electrolytic hydrogen production, changing the situation that it was difficult to detect the reverse connection problem in the early stage in the past, and greatly improving the safety and reliability of the hydrogen production process; secondly, when the full-load hydrogen production is not reached, through this early verification mechanism, potential safety hazards can be compressed to the lowest limit, avoiding serious consequences such as equipment damage and explosion that may be caused by the reverse connection of the positive and negative electrodes, and ensuring the safety of personnel and property; furthermore, this solution does not affect the original design, which means that it can be applied on the basis of the existing PEM electrolytic hydrogen production system without large-scale transformation, reducing the cost and difficulty of technology upgrading; in addition, it makes full use of the characteristic that the hydrogen production amount is greater than the oxygen production amount to judge whether the positive and negative electrodes are connected reversely, and cleverly and efficiently realizes the anti-misconnection function, providing strong support for the stable development of the PEM electrolytic hydrogen production technology. Description of the Drawings

[0014] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention.

[0015] Figure 1 The structural block diagram of a PEM anti-misconnection hydrogen production system provided by an exemplary embodiment of the present invention is shown.

[0016] Figure 2 The flow schematic diagram of a PEM anti-misconnection hydrogen production method provided by an exemplary embodiment of the present invention is shown.

[0017] Figure 3 The structural schematic diagram of a computer device for executing the PEM anti-misconnection hydrogen production method provided by an exemplary embodiment of the present invention is shown.

[0018] In the figure: 1. Pure water tank; 2. Pure water pump; 3. Oxygen separator; 4. First flowmeter; 5. Pure water circulation pump; 6. Second flowmeter; 7. PEM electrolyzer; 8. Oxygen measurement tube; 9. Hydrogen measurement tube; 10. Hydrogen separator; 11. First valve; 12. Second valve; 13. Third valve; 14. Fourth valve; 15. Fifth valve; 16. Pure water cooler; 17. Ion filter; 18. Hydrogen production power supply; 19. Control cabinet. Detailed implementation manners

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0021] Figure 1 The structural block diagram of a PEM anti-misconnection hydrogen production system provided by an exemplary embodiment of the present invention is shown. The PEM anti-misconnection hydrogen production system includes: a pure water tank 1, a pure water pump 2, an oxygen separator 3, a first flowmeter 4, a pure water circulation pump 5, a second flowmeter 6, a PEM electrolyzer 7, an oxygen measurement tube 8, a hydrogen measurement tube 9, and a hydrogen separator 10. The input end of the pure water pump 2 is connected to the output end of the pure water tank 1, and the output end of the pure water pump 2 is respectively connected to the first input end of the oxygen separator 3 and the first end of the first flowmeter 4; the input end of the pure water circulation pump 5 is connected to the output end of the oxygen separator 3, and the output end of the pure water circulation pump 5 is connected to the first end of the second flowmeter 6; the input end of the PEM electrolyzer 7 is connected to the second end of the second flowmeter 6. The oxygen-water mixed output end of the PEM electrolyzer 7 is connected to the second input end of the oxygen separator 3 through the oxygen measurement tube 8. The hydrogen-water mixed output end of the PEM electrolyzer 7 and the second end of the first flowmeter 4 are both connected to the input end of the hydrogen separator 10 through the hydrogen measurement tube 9. The output end of the hydrogen separator 10 is connected to the input end of the pure water tank 1. The oxygen separator 3 also has an oxygen outlet end, and the hydrogen separator 10 also has a hydrogen outlet end; wherein, a first valve 11 is arranged between the output end of the pure water pump 2 and the first input end of the oxygen separator 3, and second valves 12 and a third valve 13 are respectively arranged on both sides of the first flowmeter 4, and fourth valves 14 and a fifth valve 15 are respectively arranged on both sides of the second flowmeter 6.

[0022] In the embodiment of the present application, the PEM anti-misconnection hydrogen production system constructs a hydrogen production system with self-diagnosis ability through a closed-loop water circulation and a symmetric gas path design. Specifically, the pure water tank 1 stores water as a water source and outputs in two paths through the pure water pump 2. The main path supplies water to the oxygen separator 3 through the first valve 11, and the bypass directly enters the hydrogen measurement tube 9 through the first flow meter 4. The water separated by the oxygen separator 3 is driven by the pure water circulation pump 5 and enters the PEM electrolyzer 7 through the second flow meter 6 to form a closed loop. The oxygen-water mixture generated by electrolysis returns to the oxygen separator 3 through the oxygen measurement tube 8, and the hydrogen-water mixture enters the hydrogen separator 10 through the hydrogen measurement tube 9, and the separated water returns to the pure water tank 1.

[0023] It should be noted that the oxygen measurement tube 8 and the hydrogen measurement tube 9 have the same specifications. When the positive and negative electrodes of the electrolyzer are correctly connected, the pressure in the hydrogen measurement tube 9 is significantly higher than that in the oxygen measurement tube 8 because the hydrogen production (2 mol) is twice that of oxygen (1 mol). If connected reversely, the hydrogen evolution efficiency at the anode is only 1 / 10 of the normal working condition, resulting in a sudden drop in the hydrogen side pressure. By comparing the pressure difference between the two tubes in real time through the control cabinet 19 and combining the closed-loop regulation of the first flow meter 4 (monitoring the bypass flow) and the second flow meter 6 (monitoring the main path flow), the misconnection state can be accurately identified at the startup stage (before reaching full load), avoiding irreversible damage to the membrane electrode caused by reverse current.

[0024] Furthermore, the PEM electrolyzer 7 is electrically connected to the hydrogen production power supply 18 to provide a stable DC power supply for the water electrolysis reaction, realizing the conversion of electrical energy into chemical energy. The distributed control of the first to fifth valves realizes the water path switching and emergency evacuation, and cooperates with the quick cut-off function of the hydrogen production power supply 18 to form a hardware-level anti-misconnection protection mechanism.

[0025] In some embodiments, a pure water cooler 16 is provided between the output end of the oxygen separator 3 and the input end of the pure water circulation pump 5 to control the circulating water temperature at 50 - 55 °C, optimize the performance of the proton exchange membrane, reduce the working temperature of the electrolyzer, extend the service life of the membrane material and the catalyst, improve the system energy efficiency, and reduce the heat dissipation energy consumption by 20%.

[0026] Preferably, an ion filter 17 is provided between the output end of the pure water circulation pump 5 and the first end of the second flow meter 6 to remove calcium and magnesium ions in the water (≤1 ppm), prevent electrode scaling and membrane pollution, ensure the accuracy of the flow meter (±0.5%), avoid measurement errors caused by impurities, extend the service life of the core components, and reduce the maintenance frequency.

[0027] It can be understood that the PEM anti-misconnection hydrogen production system further includes a control cabinet 19 connected to each component, which realizes the intelligent control of the whole system, dynamically adjusts the valve opening and power supply parameters, and real-time monitors pressure / flow / temperature data, etc., and supports local operation and remote monitoring. In one example, the control cabinet 19 at least includes a programmable logic controller (PLC) for processing input signals and outputting control signals according to preset logic to control the operating states of components such as pumps, valves, and power supplies; an industrial computer (IPC) for providing a human-machine interface to facilitate operators to monitor the system operating state, set parameters, store historical data, and perform remote operations and fault diagnosis; a power supply module for providing a stable power supply for each device in the control cabinet and having protection functions such as overvoltage, overcurrent, and short circuit; relays and contactors for controlling the on / off of the circuit to realize the start / stop and switching of devices such as pumps, valves, and power supplies; a communication module for realizing communication with other components of the system and a remote monitoring center and supporting data transmission using multiple communication protocols; and a sensor signal conditioning module for conditioning and converting sensor signals so that they can be accurately read and processed.

[0028] Figure 2 The flowchart of a PEM anti-misconnection hydrogen production method provided by an exemplary embodiment of the present invention is shown. This PEM anti-misconnection hydrogen production method is applied to the PEM anti-misconnection hydrogen production system described above, and this method includes the following steps: Step 201, start the pure water circulation pump through the control cabinet, open the first valve, the fourth valve, and the fifth valve, close the second valve and the third valve, and fill the PEM electrolyzer with water. In the embodiment of the present application, start the pure water circulation pump to inject water into the PEM electrolyzer, open the first valve, the fourth valve, and the fifth valve, close the second valve and the third valve. The pure water path is sequentially realized as the pure water pump, the first valve, the oxygen separator, the pure water cooler, the pure water circulation pump, the ion filter, the fourth valve, the second flowmeter, the fifth valve, the PEM electrolyzer, the oxygen measurement tube, and the oxygen separator. After the PEM electrolyzer is filled with water, perform the following step 202; in this process, the pure water cooler can cool the water to ensure that the water is within a suitable temperature range; the ion filter can remove impurity ions in the water and improve the water quality.

[0029] Step 202, close the first valve through the control cabinet, open the second valve, the third valve, the fourth valve, and the fifth valve, and control the opening degrees of the second valve, the third valve, the fourth valve, and the fifth valve so that the water flow rates on the hydrogen and oxygen sides measured by the first flowmeter and the second flowmeter are the same and the water flow rate is within a preset normal working range.

[0030] In the embodiment of the present application, the pure water path on the hydrogen side is sequentially realized as a pure water pump, a second valve, a first flowmeter, a third valve, a hydrogen measurement tube, a hydrogen separator, a pure water tank, and a pure water pump. The pure water path on the oxygen side is sequentially realized as an oxygen separator, a pure water cooler, a pure water circulation pump, an ion filter, a fourth valve, a second flowmeter, a fifth valve, a PEM electrolyzer, an oxygen measurement tube, and an oxygen separator. In this case, the reaction conditions on both sides of the PEM electrolyzer are ensured to be uniform, avoiding problems such as local overheating or uneven reaction caused by water flow differences, which helps to improve the hydrogen production efficiency and the quality of hydrogen, and also lays a foundation for accurately judging the operation state of the system subsequently.

[0031] Step 203: Start the hydrogen production power supply through the control cabinet, and the PEM electrolyzer starts to produce hydrogen.

[0032] In the embodiment of the present application, starting the hydrogen production power supply through the control cabinet provides the electric energy required for the electrolysis reaction of water in the PEM electrolyzer; when the power supply is started, the water molecules inside the PEM electrolyzer begin to decompose under the action of the electric field, generating hydrogen and oxygen.

[0033] Step 204: Judge the magnitudes of the first pressure at the hydrogen measurement tube and the second pressure at the oxygen measurement tube.

[0034] During the normal hydrogen production process, due to the different production amounts of hydrogen and oxygen, there will be a certain pressure difference between the hydrogen measurement tube and the oxygen measurement tube. By judging the magnitudes of the first pressure at the hydrogen measurement tube and the second pressure at the oxygen measurement tube, it is possible to indirectly understand whether the electrolysis reaction is proceeding normally and whether there are abnormal situations in the system, such as problems like the positive and negative electrodes being connected reversely.

[0035] Step 205: If the first pressure is greater than the second pressure, close the second valve and the third valve through the control cabinet, and open the first valve, and the PEM anti-misconnection hydrogen production system enters the safe operation state.

[0036] In the embodiment of the present application, when it is judged that the first pressure is greater than the second pressure, it indicates that the system is in a normal operation state; by closing the second valve and the third valve through the control cabinet and opening the first valve, the water flow path and working mode of the system can be optimized, enabling the PEM anti-misconnection hydrogen production system to enter the safe operation state and ensuring the continuous and efficient generation of hydrogen and oxygen.

[0037] Step 206: If the first pressure is less than the second pressure, turn off the hydrogen production power supply through the control cabinet, the PEM electrolyzer stops producing hydrogen, and check whether the positive and negative electrodes of the PEM electrolyzer are connected reversely.

[0038] In an embodiment of the present application, if the first pressure is less than the second pressure, it means that the positive and negative electrodes of the PEM electrolyzer are connected reversely. At this time, by closing the hydrogen production power supply through the control cabinet, the electrolysis reaction can be stopped in time, avoiding further damage to the PEM electrolyzer caused by the reverse current due to the reverse connection, and protecting the safety of the equipment. Finally, the operator is notified to check whether the positive and negative electrodes of the PEM electrolyzer are connected reversely, so as to detect and correct the error in time, make the system resume normal operation, and ensure the smooth progress of the hydrogen production process.

[0039] Figure 3 FIG. 4 shows a schematic structural diagram of a computer device for implementing a PEM anti-misconnection hydrogen production method provided by an exemplary embodiment of the present invention. The computer device includes: The processor 301 includes one or more processing cores. The processor 301 executes various functional applications and data processing by running software programs and modules.

[0040] The receiver 302 and the transmitter 303 can be implemented as a communication component, and the communication component can be a communication chip. Optionally, the communication component can be implemented to include a signal transmission function. That is, the transmitter 303 can be used to transmit control signals to the image acquisition device and the scanning device, and the receiver 302 can be used to receive corresponding feedback instructions.

[0041] The memory 304 is connected to the processor 301 through the bus 305.

[0042] The memory 304 can be used to store at least one instruction, and the processor 301 is used to execute the at least one instruction to implement each step in the above method embodiment.

[0043] An embodiment of the present invention further provides a computer-readable storage medium, in which at least one instruction, at least one segment of program, code set or instruction set is stored, and is loaded and executed by a processor to implement the above PEM anti-misconnection hydrogen production method.

[0044] The present invention also provides a computer program product or a computer program. The computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the PEM anti-misconnection hydrogen production method described in any one of the above embodiments.

[0045] Optionally, the computer-readable storage medium may include: read-only memory (ROM), random access memory (RAM), solid state drives (SSD), or optical discs, etc. Among them, the random access memory may include resistive random access memory (ReRAM) and dynamic random access memory (DRAM). The serial numbers of the embodiments of the present invention above are only for description and do not represent the superiority or inferiority of the embodiments.

[0046] It can be understood that the specific examples herein are only for helping those skilled in the art to better understand the present disclosure, rather than limiting the scope of the present invention.

[0047] It can be understood that in various embodiments of this specification, the magnitudes of the serial numbers of the processes do not mean the sequence of execution. The execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the present disclosure.

[0048] It can be understood that the various embodiments described in this specification can be implemented alone or in combination, and the present disclosure does not limit this.

[0049] Unless otherwise specified, all technical and scientific terms used in the present disclosure have the same meaning as commonly understood by those skilled in the technical field of this specification. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the scope of this specification. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items. The singular forms "a", "above", and "the" used in the present disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0050] It can be understood that the processor of the present disclosure can be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiments can be completed by the integrated logic circuit in the hardware of the processor or instructions in the form of software. The above-mentioned processor can be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. It can implement or execute the various methods, steps, and logic block diagrams disclosed in the present disclosure. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in combination with the present disclosure can be directly embodied as being executed by a hardware decoding processor, or completed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the art such as a random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, register, etc. This storage medium is located in the memory, and the processor reads the information in the memory and combines its hardware to complete the steps of the above method.

[0051] It can be understood that the memory in the present disclosure can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0052] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or by a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this specification.

[0053] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments, and will not be elaborated herein.

[0054] In the several embodiments provided in this specification, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms.

[0055] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0056] In addition, in each embodiment of this specification, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0057] If the functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of this specification, in essence, or the parts that contribute to the prior art or parts of the technical solutions can be embodied in the form of software products. The computer software products are stored in a storage medium and include several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of this specification. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs that can store program codes.

[0058] The above is only the specific embodiment of this specification, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this specification, and all should be covered by the protection scope of this specification. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A PEM anti-misconnection hydrogen production system, characterized in that, The system includes: A pure water pump, whose input end is connected to the output end of the pure water tank, and whose output end is respectively connected to the first input end of the oxygen separator and the first end of the first flowmeter; A pure water circulation pump, whose input end is connected to the output end of the oxygen separator, and whose output end is connected to the first end of the second flowmeter; and A PEM electrolytic cell, whose input end is connected to the second end of the second flowmeter, and whose oxygen-water mixed output end is connected to the second input end of the oxygen separator through an oxygen measuring tube, and whose hydrogen-water mixed output end and the second end of the first flowmeter are both connected to the input end of the hydrogen separator through a hydrogen measuring tube, and the output end of the hydrogen separator is connected to the input end of the pure water tank; the oxygen separator also has an oxygen outlet end, and the hydrogen separator also has a hydrogen outlet end; Wherein, a first valve is arranged between the output end of the pure water pump and the first input end of the oxygen separator, and a second valve and a third valve are respectively arranged on both sides of the first flowmeter, and a fourth valve and a fifth valve are respectively arranged on both sides of the second flowmeter.

2. The PEM anti-misconnection hydrogen production system according to claim 1, wherein The oxygen measuring tube and the hydrogen measuring tube have the same specification size.

3. The PEM hydrogen production system for preventing wrong connection according to claim 1, characterized in that, A pure water cooler is arranged between the output end of the oxygen separator and the input end of the pure water circulation pump.

4. The PEM hydrogen production system for preventing misconnection according to claim 1, characterized in that, An ion filter is arranged between the output end of the pure water circulation pump and the first end of the second flowmeter.

5. The PEM anti-misconnection hydrogen production system according to claim 1, characterized in that, The PEM electrolytic cell is electrically connected to a hydrogen production power supply.

6. The PEM anti-misconnection hydrogen production system according to claim 1, wherein The PEM hydrogen production system with anti-misconnection also includes a control cabinet connected to each component.

7. A PEM anti-misconnection hydrogen production method, characterized in that, The method is applied to the PEM hydrogen production system with anti-misconnection according to any one of claims 1 to 6, and the method includes: Start the pure water circulation pump through the control cabinet, open the first valve, the fourth valve, and the fifth valve, close the second valve and the third valve, and fill the PEM electrolytic cell with water; Close the first valve through the control cabinet, open the second valve, the third valve, the fourth valve, and the fifth valve, and control the opening degrees of the second valve, the third valve, the fourth valve, and the fifth valve to make the water flow rates on the hydrogen and oxygen sides measured by the first flowmeter and the second flowmeter consistent and make the water flow rate within a preset normal working range; Start the hydrogen production power supply through the control cabinet, and the PEM electrolytic cell starts to produce hydrogen; Judge the magnitudes of the first pressure at the hydrogen measuring tube and the second pressure at the oxygen measuring tube; If the first pressure is greater than the second pressure, close the second valve and the third valve through the control cabinet, and open the first valve, and the PEM hydrogen production system with anti-misconnection enters a safe operation state; If the first pressure is less than the second pressure, turn off the hydrogen production power supply through the control cabinet, stop the PEM electrolytic cell from producing hydrogen, and check whether the positive and negative electrodes of the PEM electrolytic cell are connected reversely.

8. A computer device, characterized in that, The computer device includes a processor and a memory, and at least one instruction, at least one program, a code set or an instruction set is stored in the memory, and the at least one instruction, at least one program, a code set or an instruction set is loaded and executed by the processor to implement the PEM hydrogen production method according to claim 7.

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