Treatment method, system and equipment after emergency shutdown of PEM electrolytic tank and medium

Abstract

The invention relates to the technical field of batteries, and discloses a treatment method, system, equipment and medium after emergency shutdown of a PEM electrolytic cell, and the treatment method comprises the following steps: after an emergency shutdown instruction is received, monitoring fluid temperature, hydrogen concentration and relative humidity at an outlet of a cavity in the PEM electrolytic cell; controlling an inert gas purging system to purge inert gas to the chamber according to a first control condition so as to perform drying treatment; under the condition that the fluid temperature, the hydrogen concentration and the relative humidity meet the inert gas purging stopping conditions, the inert gas purging system is controlled to stop purging; after a cathode chamber in the chamber is filled with reactant water, the air purging system is controlled to purge air to the chamber according to a second control condition so as to carry out drying treatment; and under the condition that the hydrogen concentration and the relative humidity meet the air purging stopping condition, the air purging system is controlled to stop purging. The device has the beneficial effects that residual gas is discharged in time, air pressure balance in the membrane is ensured, and heat is effectively discharged to maintain the safety and stability of the electrolytic tank.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a method, system, equipment and medium for processing a PEM electrolytic cell after emergency shutdown. Background Art

[0002] Emergency shutdown of PEM electrolyzers may lead to accumulation of hydrogen and oxygen gases, membrane expansion, and heat accumulation, which may cause safety hazards and material damage.

[0003] Therefore, how to discharge residual gas in time, ensure the air pressure balance inside the membrane, and effectively discharge heat to maintain the safety and stability of the electrolytic cell is a problem that needs to be solved urgently. Summary of the invention

[0004] The present application provides a method, system, equipment and medium for processing a PEM electrolytic cell after emergency shutdown, which solves the technical problem that the PEM electrolytic cell may cause accumulation of hydrogen and oxygen gases, membrane expansion and heat accumulation during emergency shutdown, thereby causing safety hazards and material damage, and achieves the technical effect of timely discharging residual gas, ensuring the balance of air pressure in the membrane, and effectively discharging heat to maintain the safety and stability of the electrolytic cell.

[0005] In order to achieve the above objectives, the main technical solutions adopted in this application include: In a first aspect, an embodiment of the present application provides a treatment method for a PEM electrolytic cell after emergency shutdown, which is applied to a PEM electrolytic cell treatment device, wherein the PEM electrolytic cell treatment device includes an inert gas purge system and an air purge system, and the treatment method includes: After receiving the emergency shutdown command, the fluid temperature, hydrogen concentration and relative humidity at the outlet of the chamber in the PEM electrolytic cell are monitored, and the inert gas purge system is controlled to purge the inert gas into the chamber according to the first control condition to perform a drying process; When the fluid temperature, the hydrogen concentration and the relative humidity meet the conditions for stopping the inert gas purge, controlling the inert gas purge system to stop the purge; After the cathode chamber in the chamber is filled with reactant water, the air purge system is controlled to purge air into the chamber according to a second control condition to perform a drying process; When the hydrogen concentration and the relative humidity meet the condition for stopping air purge, the air purge system is controlled to stop purge.

[0006] The present embodiment provides a method for processing a PEM electrolytic cell after an emergency shutdown. After receiving an emergency shutdown command, by monitoring the fluid temperature, hydrogen concentration and relative humidity, the safety state of the chamber can be evaluated in real time to avoid the risk of explosion caused by hydrogen accumulation. Then, by purging with an inert gas, the hydrogen concentration and humidity in the chamber can be effectively reduced, thereby reducing potential material corrosion and other safety hazards. Stop purging after the conditions for stopping purging the inert gas are met to ensure the accuracy of gas processing and avoid unnecessary waste of resources. Finally, by filling the cathode chamber with reactant water and then purging with air, preparations can be made for subsequent normal operations to ensure that the PEM electrolytic cell is in a safe environment before restarting.

[0007] Optionally, the first control condition includes a first temperature range and a second temperature range; wherein the first temperature range is greater than the second temperature range; and controlling the inert gas purge system to purge the inert gas into the chamber according to the first control condition to perform a drying process includes: When the temperature of the fluid is greater than or equal to a temperature threshold, controlling the inert gas purge system to purge inert gas into the chamber within the first temperature range to perform a drying process; When the fluid temperature is lower than the temperature threshold, the inert gas purge system is controlled to purge inert gas into the chamber according to the second temperature range to perform a drying process.

[0008] In this embodiment, when the fluid temperature reaches or exceeds the set temperature threshold, the higher first temperature range is used for inert gas purging, which can quickly remove moisture in the chamber and improve drying efficiency. When the fluid temperature is lower than the temperature threshold, the lower second temperature range is used for purging to avoid equipment damage caused by excessive temperature difference and ensure safe operation. By dynamically adjusting the gas purging temperature range according to the fluid temperature, unnecessary energy consumption is effectively reduced, the overall resource utilization rate is improved, and the subsequent operation stability of the PEM electrolytic cell is improved.

[0009] Optionally, the first control condition includes a first pressure range, a second pressure range, and a third pressure range; wherein the third pressure range is greater than the second pressure range, and the second pressure range is greater than the first pressure range; and controlling the inert gas purge system to purge the inert gas into the chamber according to the first control condition to perform a drying process includes: When the hydrogen concentration is greater than a first concentration threshold, controlling the inert gas purge system to purge the inert gas into the chamber within the first pressure range to perform a drying process; When the hydrogen concentration is within the second concentration range, controlling the inert gas purge system to purge the inert gas into the chamber according to the second pressure range to perform a drying process; When the hydrogen concentration is less than a third concentration threshold, the inert gas purge system is controlled to purge inert gas into the chamber according to the third pressure range to perform a drying process.

[0010] In this embodiment, when the hydrogen concentration is greater than the first concentration threshold, a higher first pressure range is used for purging, which can effectively increase the drying rate and quickly remove moisture in the chamber. When the hydrogen concentration is within the second range, by adjusting to the second pressure range, it can be ensured that drying is performed under appropriate gas flow conditions to avoid unnecessary gas loss. When the hydrogen concentration is lower than the third concentration threshold, the third pressure range is used for purging, which reduces the gas pressure and reduces potential safety risks. Dynamic adjustment of the purge pressure range helps to reduce and extend the service life of the PEM electrolyzer.

[0011] Optionally, the condition for stopping purging the inert gas includes: The relative humidity is less than a first stop humidity threshold, the fluid temperature is less than a first stop temperature threshold, and the hydrogen concentration is less than a first stop concentration threshold.

[0012] Optionally, after the cathode chamber in the chamber is filled with the reactant water, the method further includes: waiting for a preset time after the cathode chamber in the chamber is filled with the reactant water to determine the descending height of the reactant water; when the descending height is greater than or equal to the distance between the bottom of the fluid channel in the PEM electrolytic cell and the top plate of the PEM electrolytic cell, supplementing the reactant water to fill the cathode chamber.

[0013] This embodiment can effectively monitor the drop in water level by filling the cathode chamber with reactant water and waiting for a preset time, reflecting the dissolution and migration of hydrogen. When the drop height reaches or exceeds the distance between the bottom of the fluid channel of the PEM electrolyzer and the top plate, timely replenishment of reactant water can ensure that the cathode chamber always maintains an appropriate water level. The efficiency and stability of the PEM electrolyzer are improved, ensuring the continuous suitability of the reaction environment.

[0014] Optionally, the second control condition includes a preset purge pressure range and a preset purge temperature range; and controlling the air purge system to purge air into the chamber according to the second control condition to perform a drying process includes: The air purge system is controlled to purge an inert gas into the chamber according to the preset purge pressure range and the preset purge temperature range to perform a drying process.

[0015] In this embodiment, the air purge helps to effectively remove moisture in the chamber and improve the drying efficiency. Within the controlled pressure and temperature range, damage to the PEM electrolytic cell caused by excessively high or low parameters can be avoided.

[0016] Optionally, the purge air stopping condition includes: The relative humidity is less than a second stop humidity threshold and the hydrogen concentration is less than a second stop concentration threshold.

[0017] In a second aspect, an embodiment of the present application provides a treatment system for a PEM electrolytic cell after emergency shutdown, which is applied to a PEM electrolytic cell treatment device, wherein the PEM electrolytic cell treatment device includes an inert gas purge system and an air purge system, and the treatment system includes: Controlling the inert gas purge module, which is used to monitor the fluid temperature, hydrogen concentration and relative humidity at the outlet of the chamber in the PEM electrolytic cell after receiving the emergency shutdown command, and control the inert gas purge system to purge the inert gas into the chamber according to the first control condition for drying treatment; An inert gas purging stopping module is used to control the inert gas purging system to stop purging when the fluid temperature, the hydrogen concentration and the relative humidity meet the inert gas purging stopping conditions; Controlling the air purge module, for controlling the air purge system to purge air into the chamber for drying according to a second control condition after the cathode chamber in the chamber is filled with reactant water; The air purge stopping module is used to control the air purge system to stop purge when the hydrogen concentration and the relative humidity meet the air purge stopping condition.

[0018] In a third aspect, an embodiment of the present application provides a computer device, including: A memory and a processor, wherein the memory and the processor are in communication with each other, the memory stores computer instructions, and the processor executes the above-mentioned method for processing after emergency shutdown of the PEM electrolytic cell by executing the computer instructions.

[0019] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which computer instructions are stored, and the computer instructions are used to enable a computer to execute the above-mentioned processing method after emergency shutdown of a PEM electrolytic cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1A flowchart of a method for processing a PEM electrolytic cell after emergency shutdown provided in an embodiment of the present application; Figure 2 A flowchart of step S1 provided in an embodiment of the present application; Figure 3 Another flowchart of step S1 provided in an embodiment of the present application; Figure 4 A flow chart after the cathode chamber in the chamber is filled with reactant water provided in an embodiment of the present application; Figure 5 It is a partial schematic diagram of the end plate in a PEM electrolytic cell; Figure 6 A flowchart of step S5 provided in an embodiment of the present application; Figure 7 A block diagram of a processing system after an emergency shutdown of a PEM electrolytic cell provided in an embodiment of the present application; Figure 8 A schematic diagram of the structure of a computer device provided in an embodiment of the present application.

[0022] Description of Reference Numerals 1- Top plate, 2- Fluid channels. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0024] When an emergency shutdown occurs in a PEM electrolyzer, the current immediately drops to 0A, the cathode and anode pressures quickly return to normal pressure, and the water supply stops. This leads to the following problems: First, hydrogen may accumulate in the cathode chamber, while oxygen accumulates in the anode chamber. If the two come into contact, an explosion may occur; second, the hydrogen pressure inside the proton exchange membrane may exceed the chamber pressure, causing the membrane to expand and damage the core components; finally, the heat accumulated during the shutdown cannot be discharged in time, which may accelerate material aging. To solve these problems, it is necessary to discharge residual gas in time to ensure the balance of gas pressure inside the membrane, and take measures to effectively discharge heat to maintain the safety and stability of the electrolyzer.

[0025] According to an embodiment of the present application, an embodiment of a method for processing a PEM electrolytic cell after an emergency shutdown is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0026] In this embodiment, a method for processing a PEM electrolytic cell after emergency shutdown is provided, which is applied to a PEM electrolytic cell processing device. The PEM electrolytic cell processing device includes an inert gas purge system and an air purge system. Figure 1 A flowchart of a method for processing a PEM electrolytic cell after emergency shutdown provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the process includes the following steps: Step S1, after receiving the emergency shutdown command, monitor the fluid temperature, hydrogen concentration and relative humidity at the chamber outlet of the PEM electrolytic cell, and control the inert gas purge system to purge inert gas into the chamber according to the first control condition for drying treatment.

[0027] Specifically, after receiving the emergency shutdown command, in order to ensure the safety of the PEM electrolytic cell and extend the service life of the equipment, the current is adjusted to 0A, the electrolysis reaction stops, and the fluid pressure in the chamber is released to normal pressure to prevent damage to the equipment. At the same time, the supply of reactant water is stopped to avoid continued water supply in the shutdown state. It is necessary to confirm that the water, electricity, and gas safety hazards of the PEM electrolytic cell have been eliminated to ensure the safe use of the system. Then monitor the fluid temperature, hydrogen concentration, and relative humidity at the chamber outlet, which affect the electrolysis efficiency and safety; excessive hydrogen concentration may increase the risk of explosion, and excessive fluid temperature may damage the material or affect the service life.

[0028] The first control condition is the temperature, pressure and hydrogen concentration conditions that the inert gas purge system must meet after the emergency shutdown of the PEM electrolyzer, to ensure the safety of the internal environment of the PEM electrolyzer and prevent potential risks such as hydrogen accumulation. By controlling the purge of the inert gas purge system, the hydrogen concentration and humidity are reduced, and safety and reliability are improved. According to the monitoring data, the inert gas purge system is controlled to purge inert gas into the chamber for drying. The inert gas purge system is used to remove hydrogen, reduce humidity, prevent internal corrosion, and ensure the safety of the environment of the PEM electrolyzer before restarting.

[0029] Step S3, when the fluid temperature, hydrogen concentration and relative humidity meet the conditions for stopping the inert gas purging, controlling the inert gas purging system to stop purging.

[0030] The stop purge inert gas condition is a limiting condition when the fluid temperature is below a set threshold, the hydrogen concentration is below a safe level, and the relative humidity drops to a safe range.

[0031] In some embodiments, the conditions for stopping the inert gas purge include: The relative humidity is less than a first stop humidity threshold, the fluid temperature is less than a first stop temperature threshold, and the hydrogen concentration is less than a first stop concentration threshold.

[0032] Specifically, in the emergency shutdown process of the PEM electrolytic cell, when the fluid temperature inside the PEM electrolytic cell drops below a preset safe first stop temperature threshold, it indicates that the PEM electrolytic cell has been cooled sufficiently and no longer needs to be further cooled by inert gas purging. When the hydrogen concentration drops below a safe first stop concentration threshold, it means that the hydrogen inside the PEM electrolytic cell has been effectively diluted or discharged, reducing the risk of explosion, so the purging can be stopped. When the relative humidity drops below a safe first stop humidity threshold, it means that the humidity inside the PEM electrolytic cell is low enough and no longer needs to be further dried by inert gas purging. The inert gas purging will only be stopped when these three conditions are met at the same time. This is to ensure that the internal environment of the PEM electrolytic cell is safe before restarting or performing other operations. The condition for stopping the inert gas purging is part of the safety control of the PEM electrolytic cell, which is intended to prevent the purging from stopping too early when the safety conditions are not met, and also to avoid unnecessary energy waste.

[0033] Preferably, the first stop humidity threshold is set to 30%, the first stop temperature threshold is set to 25° C., and the first stop concentration threshold is set to 50 ppm. The condition for stopping the purge of inert gas is based on continuous monitoring by the sensor for 30 seconds.

[0034] Step S5, after the cathode chamber in the chamber is filled with reactant water, the air purge system is controlled to purge air into the chamber according to the second control condition to perform a drying process.

[0035] The second control condition refers to using an air purge system to purge the cathode chamber of the PEM electrolytic cell at a preset purge pressure and temperature range after the reactant water is filled in the cathode chamber of the PEM electrolytic cell to achieve the purpose of drying.

[0036] Specifically, after the cathode chamber of the PEM electrolytic cell is filled with reactant water, an air purge system is used to dry the interior of the PEM electrolytic cell. During this process, the purge air needs to meet certain pressure and temperature settings to ensure that the moisture inside the PEM electrolytic cell is effectively removed while avoiding thermal shock or other potential damage to the PEM electrolytic cell.

[0037] Step S7, when the hydrogen concentration and relative humidity meet the conditions for stopping air purge, control the air purge system to stop purge.

[0038] The condition for stopping the purge air is when the relative humidity inside the electrolytic cell is lower than the set threshold and the hydrogen concentration is lower than the set safety range.

[0039] In some embodiments, the stop purge air conditions include: The relative humidity is less than a second stop humidity threshold and the hydrogen concentration is less than a second stop concentration threshold.

[0040] Specifically, during the shutdown process of the PEM electrolysis cell, when the relative humidity inside the PEM electrolysis cell is lower than the set second stop humidity threshold and the hydrogen concentration is lower than the set second stop concentration threshold, as a safety measure, the operation of the air purge system will be automatically stopped to avoid excessive drying or unnecessary energy consumption.

[0041] Preferably, the second stop humidity threshold is set to 20%, and the second stop concentration threshold is set to 10 ppm. And the stop purge air condition is based on the sensor monitoring for 30 seconds continuously.

[0042] The present embodiment provides a method for processing a PEM electrolytic cell after an emergency shutdown. After receiving an emergency shutdown command, by monitoring the fluid temperature, hydrogen concentration and relative humidity, the safety state of the chamber can be evaluated in real time to avoid the risk of explosion caused by hydrogen accumulation. Then, by purging with an inert gas, the hydrogen concentration and humidity in the chamber can be effectively reduced, thereby reducing potential material corrosion and other safety hazards. Stop purging after the conditions for stopping purging the inert gas are met to ensure the accuracy of gas processing and avoid unnecessary waste of resources. Finally, by filling the cathode chamber with reactant water and then purging with air, preparations can be made for subsequent normal operations to ensure that the PEM electrolytic cell is in a safe environment before restarting.

[0043] Figure 2 A flowchart of step S1 provided in an embodiment of the present application, wherein the first control condition includes a first temperature range and a second temperature range; wherein the first temperature range is greater than the second temperature range; the process may include the following steps: Step S111 : when the temperature of the fluid is greater than or equal to the temperature threshold, controlling the inert gas purge system to purge the inert gas into the chamber within a first temperature range to perform a drying process.

[0044] Step S113, when the fluid temperature is less than the temperature threshold, controlling the inert gas purge system to purge the inert gas into the chamber within a second temperature range to perform a drying process.

[0045] The first temperature range is set to 30-35°C, and the second temperature range is set to 20-25°C.

[0046] Specifically, in the emergency shutdown process of the PEM electrolytic cell, if the temperature sensor detects that the fluid temperature at the cathode or anode outlet reaches or exceeds the temperature threshold, which is set to 45°C, the inert gas purge system is controlled to use an inert gas such as nitrogen with a first temperature range of 30°C to 35°C to purge the electrolytic cell chamber to reduce the temperature and perform a drying process. This is to ensure that the electrolytic cell operates within a safe temperature range to prevent damage that may be caused by overheating.

[0047] When the fluid temperature at the cathode or anode outlet of the PEM electrolyzer is lower than 45°C, the inert gas purge system is controlled to use nitrogen with a second temperature range of 20°C to 25°C to continue the drying process. This is to ensure that the PEM electrolyzer can be safely lowered to a suitable temperature after shutdown to prevent condensation and corrosion, while creating suitable conditions for subsequent operation or storage.

[0048] and Figure 1 Compared with the embodiment shown in the figure, in this embodiment, when the fluid temperature reaches or exceeds the set temperature threshold, the higher first temperature range is used for inert gas purging, which can quickly remove moisture in the chamber and improve the drying efficiency. When the fluid temperature is lower than the temperature threshold, the lower second temperature range is used for purging to avoid equipment damage caused by excessive temperature difference and ensure safe operation. By dynamically adjusting the gas purging temperature range according to the fluid temperature, unnecessary energy consumption is effectively reduced, the overall resource utilization rate is improved, and the subsequent operation stability of the PEM electrolytic cell is improved.

[0049] Figure 3 Another flowchart of step S1 provided in an embodiment of the present application, wherein the first control condition includes a first pressure range, a second pressure range, and a third pressure range; wherein the third pressure range is greater than the second pressure range, and the second pressure range is greater than the first pressure range; the process may include the following steps: Step S121 , when the hydrogen concentration is greater than a first concentration threshold, controlling the inert gas purge system to purge the inert gas into the chamber within a first pressure range to perform a drying process.

[0050] Step S123 , when the hydrogen concentration is within the second concentration range, controlling the inert gas purge system to purge the inert gas into the chamber according to the second pressure range to perform a drying process.

[0051] Step S125 , when the hydrogen concentration is less than the third concentration threshold, controlling the inert gas purge system to purge the inert gas into the chamber within a third pressure range to perform a drying process.

[0052] The first pressure range is set to 0.1-0.3 barg, the second pressure range is set to 0.3-0.5 barg, and the third pressure range is set to 0.5-1.0 barg.

[0053] Specifically, in the emergency shutdown process of the PEM electrolyzer, the first control condition involves different hydrogen concentration thresholds and corresponding inert gas purge pressure ranges. When the hydrogen concentration is greater than the first concentration threshold, the first concentration threshold here is 1000ppm, and the first pressure range is used for purging. When the hydrogen concentration is in the second concentration range, the second concentration range here is 200-1000ppm, and the second pressure range is used for purging. When the hydrogen concentration is less than the third concentration threshold, the third concentration threshold here is 200ppm, and the third pressure range is used for purging. It is ensured that appropriate purge pressures are taken according to different hydrogen concentrations to effectively reduce the hydrogen concentration to a safe level and prevent safety risks caused by hydrogen accumulation. By precisely controlling the purge pressure of the inert gas, the drying process can be optimized to ensure the safety of the internal environment of the PEM electrolyzer.

[0054] and Figure 1 Compared with the embodiment shown, this embodiment uses a higher first pressure range for purging when the hydrogen concentration is greater than the first concentration threshold, which can effectively increase the drying rate and quickly remove moisture in the chamber. When the hydrogen concentration is within the second range, by adjusting to the second pressure range, it can be ensured that drying is performed under appropriate gas flow conditions to avoid unnecessary gas loss. When the hydrogen concentration is lower than the third concentration threshold, the third pressure range is used for purging, which reduces the gas pressure and reduces potential safety risks. Dynamic adjustment of the purge pressure range helps to reduce and extend the service life of the PEM electrolyzer.

[0055] Figure 4 A flow chart after the cathode chamber in the chamber is filled with reactant water is provided in an embodiment of the present application. The flow chart may include the following steps: Step S501, after the cathode chamber in the chamber is filled with reactant water, wait for a preset time to determine the falling height of the reactant water.

[0056] Step S503, when the descending height is greater than or equal to the distance between the bottom of the fluid channel in the PEM electrolytic cell and the top plate of the PEM electrolytic cell, the cathode chamber is filled with supplementary reactant water.

[0057] Specifically, after the cathode chamber is filled with reactant water, a preset duration will be waited, usually 0-30min, preferably 10-20min, to observe the drop height of the reactant water. At this time, the water in the cathode chamber will penetrate into the anode chamber through the proton exchange membrane in the PEM electrolyzer, and the residual hydrogen in the proton exchange membrane will dissolve in the reactant water, causing the water level to drop. In addition, the pore structure of the inner wall of the cathode and anode chambers will also have residual hydrogen. After filling the reactant water, the hydrogen will also dissolve, further lowering the water level. Therefore, this preset duration is to ensure that water has enough time to flow inside the PEM electrolyzer and dissolve as much hydrogen as possible. After waiting for the preset duration, the drop height of the reactant water will be detected. If the drop height reaches the distance between the bottom of the fluid channel in the PEM electrolyzer and the top plate of the electrolyzer, this indicates that the reactant water in the cathode chamber has been reduced to a certain extent and needs to be supplemented. At this time, low-flow water (water flow rate between 0.1-10 L / min, preferably 0.5-2 L / min) will be used to replenish the water level in the cathode chamber to ensure that it is filled. After replenishment, the water level will be kept for a period of 0-30 minutes, preferably 10-20 minutes, to ensure that the inside of the electrolytic cell is fully moistened and ready for subsequent operations.

[0058] See also Figure 5 , Figure 5 It is a partial schematic diagram of the end plate in the PEM electrolytic cell. The descending height is set to d, H1 is the height between the top of the fluid channel 2 and the top plate 1, and H2 is the diameter of the fluid channel 2. When d≥H1+H2, it can also be understood that when the water level is lower than the bottom of the fluid channel 2, the reactant water needs to be supplemented to fill the cathode chamber.

[0059] and Figure 1 Compared with the embodiment shown in the figure, this embodiment can effectively monitor the drop in water level by filling the cathode chamber with reactant water and waiting for a preset time, reflecting the dissolution and migration of hydrogen. When the drop height reaches or exceeds the distance between the bottom of the fluid channel of the PEM electrolyzer and the top plate, timely replenishment of reactant water can ensure that the cathode chamber always maintains an appropriate water level. The efficiency and stability of the PEM electrolyzer are improved, ensuring the continuous suitability of the reaction environment.

[0060] Figure 6 In the flowchart of step S5 provided in the embodiment of the present application, the second control condition includes a preset purge pressure range and a preset purge temperature range; the process may include the following steps: Step S51 , controlling the air purge system to purge inert gas into the chamber according to a preset purge pressure range and a preset purge temperature range to perform a drying process.

[0061] Specifically, in order to ensure that the internal structure of the electrolytic cell is not damaged due to excessive pressure during the purge process, the preset purge pressure range is set to 0-1 barg, and the preferred range is 0.1-0.3 barg. The preset purge temperature range is set to 20-25°C. This temperature range will neither cause moisture condensation due to being too low nor cause thermal stress to the electrolytic cell materials due to being too high. The air purge system is controlled to purge the anode chamber and cathode chamber respectively to remove moisture and residual gas in these areas. During the purge process, sensors are used to continuously monitor the relative humidity and hydrogen concentration of the fluid at the cathode outlet and the anode outlet. This step is to ensure that the purge effect achieves the expected goal and that the purge parameters can be adjusted in time to meet safety and efficiency requirements.

[0062] and Figure 1 Compared with the embodiment shown, the present embodiment helps to effectively remove moisture in the chamber by air purge, thereby improving the drying efficiency. Within the controlled pressure and temperature range, damage to the PEM electrolytic cell caused by excessively high or low parameters can be avoided.

[0063] Accordingly, please refer to Figure 7 A block diagram of a treatment system for a PEM electrolytic cell after emergency shutdown provided in an embodiment of the present application is applied to a PEM electrolytic cell treatment device, the PEM electrolytic cell treatment device includes an inert gas purge system and an air purge system, and the system includes: Controlling the inert gas purge module S001, which is used to monitor the fluid temperature, hydrogen concentration and relative humidity at the outlet of the chamber in the PEM electrolytic cell after receiving the emergency shutdown command, and control the inert gas purge system to purge the inert gas into the chamber according to the first control condition for drying treatment; The inert gas purge stopping module S003 is used to control the inert gas purge system to stop purge when the fluid temperature, hydrogen concentration and relative humidity meet the inert gas purge stopping conditions; Controlling the air purge module S005, for controlling the air purge system to purge air into the chamber according to the second control condition to perform a drying process after the cathode chamber in the chamber is filled with reactant water; The air purge stopping module S007 is used to control the air purge system to stop purge when the hydrogen concentration and relative humidity meet the air purge stopping conditions.

[0064] In some preferred embodiments, controlling the inert gas purge module S001 includes: When the fluid temperature is greater than or equal to the temperature threshold, controlling the inert gas purge system to purge the inert gas into the chamber according to the first temperature range to perform a drying process; When the temperature of the fluid is less than the temperature threshold, the inert gas purge system is controlled to purge the inert gas into the chamber according to the second temperature range to perform a drying process.

[0065] In some preferred embodiments, the first control condition includes a first pressure range, a second pressure range and a third pressure range; wherein the third pressure range is greater than the second pressure range, and the second pressure range is greater than the first pressure range; controlling the inert gas purge module S001 includes: When the hydrogen concentration is greater than a first concentration threshold, controlling the inert gas purge system to purge the inert gas into the chamber within a first pressure range to perform a drying process; When the hydrogen concentration is within the second concentration range, controlling the inert gas purge system to purge the inert gas into the chamber according to the second pressure range to perform a drying process; When the hydrogen concentration is less than the third concentration threshold, the inert gas purge system is controlled to purge the inert gas into the chamber according to the third pressure range to perform a drying process.

[0066] In some preferred embodiments, the conditions for stopping the purging of the inert gas include: The relative humidity is less than a first stop humidity threshold, the fluid temperature is less than a first stop temperature threshold, and the hydrogen concentration is less than a first stop concentration threshold.

[0067] In some preferred embodiments, after the cathode chamber in the chamber is filled with reactant water, the system further comprises: After the cathode chamber in the chamber is filled with reactant water, a preset time is waited to determine the descending height of the reactant water; When the descending height is greater than or equal to the distance between the bottom of the fluid channel in the PEM electrolytic cell and the top plate of the PEM electrolytic cell, the supplementary reactant water is filled into the cathode chamber.

[0068] In some preferred embodiments, the second control condition includes a preset purge pressure range and a preset purge temperature range; the air purge module S005 is controlled, including: The air purge system is controlled to purge inert gas into the chamber according to a preset purge pressure range and a preset purge temperature range to perform a drying process.

[0069] In some preferred embodiments, the purge air stopping condition includes: The relative humidity is less than a second stop humidity threshold and the hydrogen concentration is less than a second stop concentration threshold.

[0070] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0071] In this embodiment, a processing system after an emergency shutdown of a PEM electrolytic cell is presented in the form of a functional module, where the module refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0072] See also Figure 8 , Figure 8 A schematic diagram of the structure of a computer device provided in an embodiment of the present application is shown in FIG. Figure 8 As shown, the computer device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process the instructions executed in the computer device, including instructions stored in or on the memory to display the graphical information of the GUI on an external input / output device (such as, a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 8 A processor 10 is taken as an example.

[0073] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0074] The memory 20 stores instructions executable by at least one processor 10, so that the at least one processor 10 executes the method shown in the above embodiment.

[0075] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0076] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memory.

[0077] The computer device further comprises a communication interface 30 for the computer device to communicate with other devices or a communication network.

[0078] The embodiment of the present application also provides a computer-readable storage medium. The above method according to the embodiment of the present application can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0079] Although the embodiments of the present application are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations are all within the scope defined by the appended claims.

[0080] The systems and modules described in the above embodiments may be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer. Specifically, the computer may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0081] For the convenience of description, the above device is described in various units according to their functions. Of course, when implementing the present application, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0082] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, etc. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0083] The present application is described with reference to the flowcharts and / or block diagrams of the methods and systems according to the embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0084] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0085] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0086] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0087] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0088] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

[0089] Although the embodiments of the present application have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for treating a PEM electrolytic cell after emergency shutdown, characterized in that: Applied to a PEM electrolytic cell treatment device, the PEM electrolytic cell treatment device includes an inert gas purge system and an air purge system, and the treatment method includes: After receiving the emergency shutdown instruction, the fluid temperature, hydrogen concentration and relative humidity at the chamber outlet of the PEM electrolytic cell are monitored, and the inert gas purge system is controlled to purge the inert gas into the chamber according to the first control condition for drying; when the fluid temperature, the hydrogen concentration and the relative humidity meet the condition for stopping the purge of the inert gas, the inert gas purge system is controlled to stop the purge; After the cathode chamber in the chamber is filled with reactant water, the air purge system is controlled to purge air into the chamber according to a second control condition to perform a drying process; When the hydrogen concentration and the relative humidity meet the condition for stopping air purge, the air purge system is controlled to stop purge.

2. The processing method according to claim 1, characterized in that: The first control condition includes a first temperature range and a second temperature range; wherein the first temperature range is greater than the second temperature range; and controlling the inert gas purge system to purge the inert gas into the chamber according to the first control condition to perform a drying process includes: When the temperature of the fluid is greater than or equal to a temperature threshold, controlling the inert gas purge system to purge inert gas into the chamber within the first temperature range to perform a drying process; When the fluid temperature is lower than the temperature threshold, the inert gas purge system is controlled to purge inert gas into the chamber according to the second temperature range to perform a drying process.

3. The processing method according to claim 1, characterized in that: The first control condition includes a first pressure range, a second pressure range, and a third pressure range; wherein the third pressure range is greater than the second pressure range, and the second pressure range is greater than the first pressure range; and controlling the inert gas purge system to purge the inert gas into the chamber according to the first control condition to perform a drying process includes: When the hydrogen concentration is greater than a first concentration threshold, controlling the inert gas purge system to purge the inert gas into the chamber within the first pressure range to perform a drying process; When the hydrogen concentration is within the second concentration range, controlling the inert gas purge system to purge the inert gas into the chamber according to the second pressure range to perform a drying process; When the hydrogen concentration is less than a third concentration threshold, the inert gas purge system is controlled to purge inert gas into the chamber according to the third pressure range to perform a drying process.

4. The processing method according to claim 1, characterized in that: The conditions for stopping the purge of inert gas include: The relative humidity is less than a first stop humidity threshold, the fluid temperature is less than a first stop temperature threshold, and the hydrogen concentration is less than a first stop concentration threshold.

5. The processing method according to claim 1, characterized in that: After the cathode chamber in the chamber is filled with the reactant water, the method further comprises: After the cathode chamber in the chamber is filled with the reactant water, a preset time is waited to determine the descending height of the reactant water; when the descending height is greater than or equal to the distance between the bottom of the fluid channel in the PEM electrolytic cell and the top plate of the PEM electrolytic cell, the reactant water is supplemented to fill the cathode chamber.

6. The processing method according to claim 1, characterized in that: The second control condition includes a preset purge pressure range and a preset purge temperature range; and controlling the air purge system to purge air into the chamber according to the second control condition to perform a drying process includes: The air purge system is controlled to purge an inert gas into the chamber according to the preset purge pressure range and the preset purge temperature range to perform a drying process.

7. The processing method according to claim 1, characterized in that: The purge air stopping conditions include: The relative humidity is less than a second stop humidity threshold and the hydrogen concentration is less than a second stop concentration threshold.

8. A treatment system for a PEM electrolytic cell after emergency shutdown, characterized in that: Applied to a PEM electrolytic cell treatment device, the PEM electrolytic cell treatment device includes an inert gas purge system and an air purge system, and the treatment system includes: Controlling the inert gas purge module, which is used to monitor the fluid temperature, hydrogen concentration and relative humidity at the outlet of the chamber in the PEM electrolytic cell after receiving the emergency shutdown command, and control the inert gas purge system to purge the inert gas into the chamber according to the first control condition for drying treatment; An inert gas purging stopping module is used to control the inert gas purging system to stop purging when the fluid temperature, the hydrogen concentration and the relative humidity meet the inert gas purging stopping conditions; Controlling the air purge module, for controlling the air purge system to purge air into the chamber for drying according to a second control condition after the cathode chamber in the chamber is filled with reactant water; The air purge stopping module is used to control the air purge system to stop purge when the hydrogen concentration and the relative humidity meet the air purge stopping condition.

9. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the method for processing a PEM electrolytic cell after emergency shutdown according to any one of claims 1 to 7 by executing the computer instructions.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the post-emergency shutdown processing method of a PEM electrolytic cell according to any one of claims 1 to 7.

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