Air pressure control method and device, electronic equipment and storage medium

Abstract

This invention provides a pressure control method, apparatus, electronic device, and storage medium for an electrolysis system. The electrolysis system includes an electrolytic cell, a first pipeline, and a second pipeline. A first electrode chamber of the electrolytic cell is connected to the first pipeline, and a second electrode chamber is connected to the second pipeline. The second pipeline includes a first branch pipe and a second branch pipe that are interconnected. The first branch pipe is used to connect to a first gas compressor, and the second branch pipe is used for pressure relief. A first regulating valve is provided on the first branch pipe, and a second regulating valve is provided on the second branch pipe. The pressure control method includes: detecting the pressure in the first pipeline and the second pipeline to determine the pressure difference between the second pipeline and the first pipeline; controlling the opening degree of the first regulating valve according to the pressure difference and a target pressure difference to reduce the deviation between the pressure difference and the target pressure difference; and opening the second regulating valve to relieve pressure in the second pipeline when the pressure difference is greater than a pressure difference threshold, wherein the pressure difference threshold is greater than the target pressure difference.

Description

Technical Field

[0001] This invention relates to the field of electrolysis technology, and in particular to a gas pressure control method, apparatus, electronic device, and storage medium. Background Technology

[0002] Electrolysis systems, such as water electrolysis for hydrogen production, are a key technological pathway for achieving green energy conversion and storage. In a typical electrolysis system, the electrolyzer serves as the core reaction unit. Internally, an ion exchange membrane separates the cathode and anode chambers, allowing for separate electrochemical reactions that generate corresponding gaseous products. These gaseous products are then discharged through their respective piping systems for further processing and storage.

[0003] Maintaining gas pressure balance across the electrolysis cell is crucial for the safe and stable operation of an electrolysis system. Excessive pressure difference can negatively impact the ion exchange membrane, potentially damaging it, affecting product purity, and even posing safety hazards. Therefore, effectively controlling the gas pressure within the pipes on both sides to maintain a reasonable pressure difference has become an important issue for ensuring the long-term stable operation of the electrolysis system. However, in practical applications, existing technologies for controlling gas pressure across the electrolysis cell still require further optimization in terms of stability and safety. Summary of the Invention

[0004] In view of this, the present invention provides a pressure control method that can ensure the stable operation of the electrolysis system and reduce the safety risks caused by pressure differential runaway.

[0005] This invention provides a gas pressure control method for an electrolysis system. The electrolysis system includes an electrolytic cell, a first pipeline, and a second pipeline. A first electrode chamber of the electrolytic cell is connected to the first pipeline, and a second electrode chamber of the electrolytic cell is connected to the second pipeline. The first and second electrode chambers are separated by an ion exchange membrane. The second pipeline includes a first branch pipe and a second branch pipe that are interconnected. The first branch pipe is used to connect to a first gas compressor, and the second branch pipe is used for pressure relief. A first regulating valve is provided on the first branch pipe, and a second regulating valve is provided on the second branch pipe. The method includes:

[0006] The air pressure of the first pipeline and the second pipeline is detected to determine the air pressure difference between the second pipeline and the first pipeline; based on the air pressure difference and the target air pressure difference, the opening of the first regulating valve is controlled to reduce the deviation between the air pressure difference and the target air pressure difference; and when the air pressure difference is greater than the pressure difference threshold, the second regulating valve is opened to depressurize the second pipeline, wherein the pressure difference threshold is greater than the target pressure difference.

[0007] In some alternative embodiments, the method further includes: in response to receiving a shutdown signal indicating the shutdown of the electrolysis system, closing the first regulating valve and adjusting the second regulating valve to a target opening.

[0008] In some optional embodiments, after adjusting the second regulating valve to the target opening, the method further includes: controlling the opening of the second regulating valve according to the pressure difference and the target pressure difference to reduce the deviation between the pressure difference and the target pressure difference.

[0009] In some optional embodiments, before adjusting the second regulating valve to the target opening degree, the method further includes: determining the target opening degree based on the current information of the electrolytic cell.

[0010] In some optional embodiments, determining the target opening degree based on the current information of the electrolytic cell includes: calculating the target opening degree according to the following formula:

[0011]

[0012] In the formula, Indicates the target opening degree. The compensation coefficient is represented by n; n represents the number of electrolytic cells included in the electrolysis system, wherein the number of electrolytic cells is one or more. This represents the current value of the i-th electrolytic cell; This represents the rated current of the i-th electrolytic cell.

[0013] In some optional embodiments, controlling the opening of the second regulating valve according to the pressure difference and the target pressure difference includes: controlling the opening of the second regulating valve according to the pressure difference and the target pressure difference, based on a first parameter, through a proportional-integral-derivative control algorithm, wherein the first parameter includes a first proportional coefficient, a first integral coefficient, and a first derivative coefficient; opening the second regulating valve when the pressure difference is greater than a pressure difference threshold includes: when the pressure difference is greater than the pressure difference threshold, controlling the opening of the second regulating valve according to a second parameter, based on a second parameter, through the proportional-integral-derivative control algorithm, wherein the second parameter includes a second proportional coefficient, a second integral coefficient, and a second derivative coefficient.

[0014] In some optional embodiments, the absolute value of the first proportional coefficient is greater than the absolute value of the second proportional coefficient, the absolute value of the first integral coefficient is less than the absolute value of the second integral coefficient, and the absolute value of the first differential coefficient is greater than the absolute value of the second differential coefficient.

[0015] In some optional embodiments, the electrolytic cell is used to electrolyze a sodium chloride solution, and when the electrolytic cell is in operation, chlorine gas is generated in the first electrode chamber and hydrogen gas is generated in the second electrode chamber, and the target pressure difference is greater than zero.

[0016] This invention also provides a pressure control device for an electrolysis system. The electrolysis system includes an electrolytic cell, a first pipeline, and a second pipeline. A first electrode chamber of the electrolytic cell is connected to the first pipeline, and a second electrode chamber of the electrolytic cell is connected to the second pipeline. The first electrode chamber and the second electrode chamber are separated by an ion exchange membrane. The second pipeline includes a first branch pipe and a second branch pipe that are interconnected. The first branch pipe is used to connect to a first gas compressor, and the second branch pipe is used for pressure relief. A first regulating valve is provided on the first branch pipe, and a second regulating valve is provided on the second branch pipe. The device includes: a differential pressure determination unit configured to detect the pressure of the first pipeline and the second pipeline and determine the pressure difference between the second pipeline and the first pipeline; and a differential pressure control unit configured to control the opening of the first regulating valve according to the pressure difference and a target pressure difference to reduce the deviation between the pressure difference and the target pressure difference; and when the pressure difference is greater than a differential pressure threshold, to open the second regulating valve to relieve pressure in the second pipeline, wherein the differential pressure threshold is greater than the target pressure difference.

[0017] This invention also provides an electronic device, which includes a processor, a communication interface, a memory, and a communication bus. The processor, the communication interface, and the memory communicate with each other through the communication bus. The memory stores at least one executable instruction, which causes the processor to perform the operation corresponding to the method described in the above embodiments.

[0018] This invention also provides a computer storage medium storing a computer program that, when executed by a processor, implements the method described in the above embodiments.

[0019] In this embodiment of the invention, the gas pressure of the first pipeline and the second pipeline can be detected to determine the pressure difference between the second pipeline and the first pipeline. Based on the pressure difference and the target pressure difference, the opening of the first regulating valve is controlled to reduce the deviation between the pressure difference and the target pressure difference. This achieves the effect of continuously tracking pressure difference changes, ensuring that the actual pressure difference always approaches the target value, improving the accuracy of pressure difference control, and ensuring the stability and safety of pressure difference control. Furthermore, when the pressure difference exceeds the pressure difference threshold, the second regulating valve is opened to release pressure in the second pipeline, which can quickly reduce the pressure on the second pipeline side, promptly curbing the further expansion of the pressure difference. This effectively avoids sudden mechanical damage to the ion exchange membrane caused by excessive pressure difference, significantly enhances the system's fault tolerance to abnormal operating conditions, ensures the stable operation of the electrolysis system, and reduces the safety risks caused by uncontrolled pressure difference. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of an electrolysis system provided in an optional embodiment of the present invention.

[0021] Figure 2 This is a schematic flowchart of an optional embodiment of the present invention for a pressure control method.

[0022] Figure 3 This is a schematic flowchart of another air pressure control method provided by an optional embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram of a pneumatic control device provided in an optional embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the structure of an electronic device provided in an optional embodiment of the present invention.

[0025] List of reference numerals in the attached diagram:

[0026] 100. Electrolysis system 110. Electrolytic cell 111. First Electrode Chamber 112. Second Electrode Chamber 120. First Pipeline 121. Third Division 122. Fourth Division 123. Third regulating valve 124. Fourth regulating valve 130. Second Pipeline 131. First division of responsibilities 132. Second division of responsibilities 133. First regulating valve 134. Second regulating valve 210. First Gas Compressor 220. Second Gas Compressor 230. Waste gas treatment equipment 240. First gas storage tank 250. Second gas storage tank 300. Air pressure control device 310. Differential Pressure Determination Unit 320. Differential Pressure Control Unit 400. Electronic equipment 402. Processor 404, Communication Interface 406. Memory 408. Communication Bus 410. Computer software Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0028] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "communication," and "fixation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] Maintaining gas pressure balance across the electrolysis cell is crucial for the safe and stable operation of an electrolysis system. Excessive pressure difference can negatively impact the ion exchange membrane, potentially damaging it, affecting product purity, and even posing safety hazards. Therefore, effectively controlling the gas pressure within the pipes on both sides to maintain a reasonable pressure difference has become an important issue for ensuring the long-term stable operation of the electrolysis system. However, in practical applications, existing technologies for controlling gas pressure across the electrolysis cell still require further optimization in terms of stability and safety.

[0030] In this embodiment of the invention, the gas pressure in the first and second pipelines can be detected to determine the pressure difference between them. Based on the pressure difference and the target pressure difference, the opening of the first regulating valve is controlled to reduce the deviation between the pressure difference and the target pressure difference. This achieves the effect of continuously tracking pressure difference changes, ensuring that the actual pressure difference always approaches the target value, improving the accuracy of pressure difference control, and ensuring the stability and safety of pressure difference control. Furthermore, when the pressure difference exceeds the pressure difference threshold, the second regulating valve is opened to release pressure in the second pipeline, which can quickly reduce the pressure on the second pipeline side and promptly curb the further expansion of the pressure difference. This effectively avoids sudden mechanical damage to the ion exchange membrane caused by excessive pressure difference, significantly enhances the system's fault tolerance to abnormal operating conditions, ensures the stable operation of the electrolysis system, and reduces the safety risks caused by uncontrolled pressure difference.

[0031] The following description, in conjunction with the accompanying drawings, illustrates the gas pressure control method for an electrolysis system provided by an example of the present invention.

[0032] like Figure 1 As shown, the electrolysis system 100 applying the gas pressure control method of this embodiment includes: an electrolytic cell 110, a first pipe 120, and a second pipe 130. The first electrode chamber 111 of the electrolytic cell 110 is connected to the first pipe 120, and the second electrode chamber 112 of the electrolytic cell 110 is connected to the second pipe 130. The first electrode chamber 111 and the second electrode chamber 112 are separated by an ion exchange membrane. The second pipe 130 includes a first branch pipe 131 and a second branch pipe 132 that are interconnected. The first branch pipe 131 is used to connect to a first gas compressor 210, which can be connected to a first gas storage tank 240. The second branch pipe 132 is used for pressure relief. The second branch pipe 132 can be connected to a waste gas treatment device 230 or directly connected to air. For example, when the gas in the second branch pipe 132 is a toxic gas, it can be connected to the waste gas treatment device; when the gas in the second branch pipe 132 is a non-toxic gas, it can be directly connected to air. A first regulating valve 133 is provided on the first branch pipe 131 to control the flow of gas in the first branch pipe 131 to the first gas compressor 210. A second regulating valve 134 is provided on the second branch pipe 132 to control the pressure relief of the second branch pipe 132.

[0033] like Figure 2 As shown, the air pressure control method provided in this embodiment of the invention includes:

[0034] S110. Detect the air pressure of the first pipe 120 and the second pipe 130, and determine the air pressure difference between the second pipe 130 and the first pipe 120.

[0035] A first pressure sensor and a second pressure sensor can be respectively installed in the first pipe 120 and the second pipe 130. The first pressure sensor can detect the pressure in the first pipe 120, and the second pressure sensor can detect the pressure in the second pipe 130. After detecting the pressure in the first pipe 120 and the second pipe 130, the pressure difference between the second pipe 130 and the first pipe 120 can be determined.

[0036] like Figure 1As shown, optionally, similar to the second pipe 130, the first pipe 120 may include a third branch pipe 121 and a fourth branch pipe 122 that are interconnected. The third branch pipe 121 is used to connect to the second gas compressor 220, which can be connected to the second gas storage tank 250. The fourth branch pipe 122 is used to connect to the waste gas treatment equipment 230. Furthermore, a third regulating valve 123 is provided on the third branch pipe 121 to control the flow of gas in the third branch pipe 121 to the second gas compressor 220. A fourth regulating valve 124 is provided on the fourth branch pipe 122 to control the flow of gas in the fourth branch pipe 122 to the waste gas treatment equipment 230.

[0037] In some optional embodiments, when the electrolysis system 100 is in operation, the fourth regulating valve 124 can be in a closed state. Based on the deviation between the gas pressure in the first pipeline 120 and a preset target gas pressure, a proportional-integral-differential (PID) control algorithm is used. This algorithm calculates the opening degree of the first regulating valve 133 according to the deviation between the gas pressure in the first pipeline 120 and the target gas pressure, combined with preset proportional, integral, and derivative coefficients, following proportional, integral, and derivative control laws. This adjusts the opening degree of the first regulating valve 133, bringing the gas pressure in the first pipeline 120 closer to the target gas pressure. The specific implementation of the above PID control algorithm can be found in relevant technologies and will not be elaborated here. Of course, other suitable control methods can also be used.

[0038] S120. Based on the pressure difference and the target pressure difference, control the opening of the first regulating valve 133 to reduce the deviation between the pressure difference and the target pressure difference. Furthermore, when the pressure difference exceeds a pressure difference threshold, open the second regulating valve 134 to release pressure from the second pipeline 130. The pressure difference threshold is greater than the target pressure difference.

[0039] The target pressure difference can be a preset pressure difference, which can be set according to needs or experience of those skilled in the art. It should be understood that the above steps are operations performed when the electrolysis system 100 is in the working stage. When the electrolysis system 100 is in the shutdown stage, the operation of this method can be referred to the following embodiment for responding to a shutdown signal, which will not be repeated here. Optionally, when the electrolysis system 100 is in the working stage and the aforementioned gas pressure difference is less than or equal to the pressure difference threshold, the second regulating valve 134 can be in the closed state to reduce the complexity of gas pressure control.

[0040] In this embodiment, the pressure difference threshold is set to be greater than the target pressure difference. By setting the pressure difference threshold, the pressure difference between the second electrode chamber 112 and the first electrode chamber 111 can be too large to prevent damage to the ion exchange membrane.

[0041] In some optional embodiments, the electrolytic cell 110 is used to electrolyze a sodium chloride solution. The first electrode chamber 111 is the anode chamber, and the second electrode chamber 112 is the cathode chamber. When the electrolytic cell 110 is operating, the first electrode chamber 111 generates chlorine gas, and the second electrode chamber 112 generates hydrogen gas. At this time, the second branch pipe 132 can be connected to the air. In this embodiment, the target pressure difference can be greater than zero; for example, the target pressure difference can be 40 mbar. On the other hand, the pressure difference threshold can be 50 mbar. Of course, the target pressure difference and the pressure difference threshold can also be other suitable values. This embodiment does not limit the specific values ​​of the target pressure difference and the pressure difference threshold.

[0042] By setting the target pressure difference to be greater than zero, the pressure control method can maintain the pressure of the second electrode chamber 112 and the second pipeline 130 on the hydrogen side higher than the pressure of the first electrode chamber 111 and the first pipeline 120 on the chlorine side during the execution process. This can effectively inhibit chlorine from permeating into the second electrode chamber 112 through the ion exchange membrane, avoid the combustion or explosion of the remaining hydrogen caused by the reaction of chlorine with some hydrogen, and ensure the safety of the electrolysis system 100.

[0043] In this embodiment of the invention, the gas pressure of the first pipe 120 and the second pipe 130 can be detected to determine the pressure difference between the second pipe 130 and the first pipe 120. Based on the pressure difference and the target pressure difference, the opening of the first regulating valve 133 is controlled to reduce the deviation between the pressure difference and the target pressure difference. This achieves the effect of continuously tracking pressure difference changes, ensuring that the actual pressure difference always approaches the target value, improving the accuracy of pressure difference control, and ensuring the stability and safety of pressure difference control. Furthermore, when the pressure difference exceeds the pressure difference threshold, the second regulating valve 134 is opened to release pressure from the second pipe 130, which can quickly reduce the pressure on the second pipe 130 side, promptly curbing the further expansion of the pressure difference. This can effectively avoid sudden mechanical damage to the ion exchange membrane caused by excessive pressure difference, significantly enhance the system's fault tolerance to abnormal operating conditions, ensure the stable operation of the electrolysis system 100, and reduce the safety risks caused by uncontrolled pressure difference.

[0044] In some alternative embodiments, the method further includes: in response to receiving a shutdown signal indicating the shutdown of the electrolysis system 100, closing the first regulating valve 133 and adjusting the second regulating valve 134 to a target opening.

[0045] Optionally, the method of this embodiment may include receiving a shutdown signal indicating the shutdown of the electrolysis system 100, so as to respond to the shutdown action of shutting down the electrolysis system 100 according to the shutdown signal. The received shutdown signal may be a shutdown signal automatically triggered due to some accident, or a shutdown signal triggered by a technician through an interactive unit such as a shutdown button or control keyboard. This embodiment does not limit the source of the shutdown signal.

[0046] In this embodiment, in response to a shutdown signal, the first regulating valve 133 is closed, which cuts off the passage between the second pipeline 130 and the downstream first gas compressor 210, stopping the gas supply to the first gas compressor 210. This allows the first gas compressor 210 and the electrolytic cell 110 to stop operating synchronously during the shutdown of the electrolysis system 100. Actively adjusting the second regulating valve 134 to the target opening provides a controlled pressure relief passage for the second pipeline 130, maintaining the pressure on the second pipeline 130 side within a controllable range. This facilitates a smooth and expected decrease in pressure on the second pipeline 130 side and the second electrode chamber 112, preventing sudden pressure changes from impacting the ion exchange membrane.

[0047] In some optional embodiments, the method further includes: in response to a received shutdown signal, closing the third regulating valve 123 and adjusting the fourth regulating valve 124 to a target opening, thereby controlling the gas pressure in the first pipeline 120. The specific implementation of this embodiment can be referred to the embodiments above, and will not be repeated here. Optionally, the target opening adjusted by the fourth regulating valve 124 can be the same as or different from the target opening adjusted by the second regulating valve 134. For example, the target opening adjusted by the fourth regulating valve 124 can be slightly larger than the target opening adjusted by the second regulating valve 134. This embodiment does not impose any limitations on this.

[0048] In some optional embodiments, after adjusting the second regulating valve 134 to the target opening, the method further includes: controlling the opening of the second regulating valve 134 according to the pressure difference and the target pressure difference to reduce the deviation between the pressure difference and the target pressure difference.

[0049] In this embodiment, after adjusting the second regulating valve 134 to the target opening degree in response to the shutdown signal, the opening degree of the second regulating valve 134 is controlled according to the air pressure difference and the target pressure difference. Closed-loop control based on real-time pressure difference feedback can be further introduced so that the second regulating valve 134 can continuously participate in pressure difference regulation throughout the shutdown process, and the air pressure difference between the second pipeline 130 and the first pipeline 120 during the shutdown process can be as close as possible to or equal to the target pressure difference.

[0050] In some alternative embodiments, before adjusting the second regulating valve 134 to the target opening, the method further includes: determining the target opening based on the current information of the electrolytic cell 110.

[0051] The current information of the electrolytic cell 110 can, to a certain extent, reflect the intensity of the electrolytic reaction in the electrolytic cell 110, thereby reflecting the rate at which the electrolytic cell 110 produces gas. At the moment a shutdown signal is received, the electrolytic cell 110 is still in a gas-producing state, and its current information directly determines the amount of remaining gas produced. By determining the target opening degree of the second regulating valve 134 based on the current information, the pressure relief capacity of the second regulating valve 134 when it reaches the target opening degree can be matched with the actual gas production rate of the electrolytic cell 110. This avoids a sudden pressure drop due to excessively rapid pressure relief or pressure accumulation due to excessively slow pressure relief, thus achieving more precise pressure control.

[0052] In some optional embodiments, determining the target opening degree based on the current information of the electrolytic cell 110 includes: calculating the target opening degree according to the following formula:

[0053]

[0054] In the formula, Indicates the target opening degree. Indicates the compensation coefficient. The value range is 90% to 98%, for example, It can be 90%, 95%, 98%, etc. n represents the number of electrolytic cells 110 included in the electrolysis system 100. The number of electrolytic cells 110 can be one or more, and correspondingly, n can be a positive integer. This represents the current value of the i-th electrolytic cell 110. This represents the rated current of the i-th electrolytic cell 110, where i can be a positive integer less than or equal to n.

[0055] In this embodiment, a quantitative mapping relationship between the current information of the electrolytic cell 110 and the target opening degree is established by introducing a calculation formula that includes the ratio of current to the corresponding rated circuit, the average value calculation, and a compensation coefficient. This formula uses the ratio of actual current to rated current to reflect the relative gas production rate, enabling a scientific match between the pressure relief capacity of the pressure relief channel represented by the target opening degree K% and the real-time gas production state of the electrolytic cell 110. By averaging the current ratios of multiple electrolytic cells 110 (1 / n∑), the calculation formula can adapt to the different operating conditions of each electrolytic cell 110 in the electrolysis system 100, maintaining overall pressure balance. (Compensation coefficient) The introduction of this formula provides a reasonable safety margin for air pressure control, preventing excessive pressure drop due to excessive opening. This calculation formula unifies the dimensional reference for different specifications of electrolytic cells 110, simplifies the parameter tuning process, and can update the target opening in real time with changes in current, ensuring that the target opening always dynamically matches the current operating conditions. It has the technical advantages of strong adaptability and ease of implementation.

[0056] In some optional embodiments, controlling the opening of the second regulating valve 134 according to the pressure difference and the target pressure difference includes: controlling the opening of the second regulating valve 134 according to the pressure difference and the target pressure difference, based on a first parameter, through a proportional-integral-derivative (PID) control algorithm, wherein the first parameter includes a first proportional coefficient, a first integral coefficient, and a first derivative coefficient.

[0057] The PID control algorithm used to control the opening of the second regulating valve 134 is used to calculate the opening of the second regulating valve 134 according to the deviation between the air pressure difference and the target pressure difference, combined with preset proportional, integral, and derivative coefficients, and thus adjust the opening of the second regulating valve 134 to make the air pressure difference approach the target pressure difference. The specific implementation of this PID control algorithm can be found in relevant technologies and will not be elaborated here. It should be understood that the proportional, integral, and derivative coefficients used in this PID control algorithm include a first proportional coefficient and a second proportional coefficient, a first integral coefficient and a second integral coefficient, and a first derivative coefficient and a second derivative coefficient, respectively.

[0058] When the pressure difference is greater than the pressure difference threshold, opening the second regulating valve 134 includes: when the pressure difference is greater than the pressure difference threshold, controlling the opening degree of the second regulating valve 134 by a PID algorithm based on the second parameter, wherein the second parameter includes a second proportional coefficient, a second integral coefficient and a second derivative coefficient.

[0059] In this embodiment, a first parameter can be set for the process of controlling the opening of the second regulating valve 134 after adjusting it to the target opening degree in response to a shutdown signal. A second parameter can be set for the process of opening and controlling the opening of the second regulating valve 134 when the pressure difference is greater than the pressure difference threshold under normal working conditions. This allows the second regulating valve 134 to use different PID control parameters for opening control during the shutdown phase and the pressure relief phase during normal working conditions. This enables differentiated responses to the adjustment needs of the second regulating valve 134 at different stages, achieving phased and refined control of the opening degree of the second regulating valve and improving the applicability of the method in this embodiment.

[0060] In some optional embodiments, the absolute value of the first proportional coefficient is greater than the absolute value of the second proportional coefficient, the absolute value of the first integral coefficient is less than the absolute value of the second integral coefficient, and the absolute value of the first derivative coefficient is greater than the absolute value of the second derivative coefficient. Optionally, the signs of the first proportional coefficient, the first integral coefficient, and the second derivative coefficient can be the same, to improve the consistency of the PID control algorithm executed based on the first and second parameters.

[0061] In this embodiment, the differences between the first and second parameters are further defined for the shutdown phase and the pressure relief phase during normal operation of the electrolysis system 100. During the shutdown phase, a first parameter with a larger proportional and derivative coefficient and a smaller integral coefficient is used, enabling the second regulating valve 134 to have a faster response speed and stronger trend prediction capability, thus timely correcting pressure differential deviations. During the pressure relief phase during normal operation, a second parameter with a smaller proportional and derivative coefficient and a larger integral coefficient is used, making the opening process of the second regulating valve 134 smoother and avoiding impact on the system caused by sudden large movements. This differentiated configuration of PID parameters allows the control characteristics of the second regulating valve 134 to be precisely matched with the dynamic requirements of each phase, thereby achieving suitable gas pressure control effects during both the normal operation phase and the shutdown phase of the electrolysis system 100.

[0062] As a feasible implementation, the mode for adjusting the opening of the second regulating valve 134 can include an automatic mode controlled by a corresponding PID control algorithm and a manual mode for manual adjustment by a technician. Optionally, in automatic mode, when the pressure difference is less than or equal to the pressure difference threshold, the opening of the second regulating valve 134 is kept at zero. During normal operation, the mode for adjusting the opening of the second regulating valve 134 can be automatic. When a shutdown signal indicating the shutdown of the electrolysis system 100 is received, i.e., when the electrolysis system 100 is in the shutdown stage, the mode for adjusting the opening of the second regulating valve 134 can be switched to manual mode to temporarily interrupt the operation of the corresponding PID control algorithm, thereby adjusting the second regulating valve 134 to the target opening. When the second regulating valve 134 is adjusted to the target opening, the mode for adjusting the opening of the second regulating valve 134 can be switched back to automatic mode, and the opening of the second regulating valve 134 is controlled again by the proportional-integral-derivative control algorithm.

[0063] Similarly, the modes for adjusting the opening of the first regulating valve 133 can also include an automatic mode controlled by a corresponding PID control algorithm and a manual mode for manual adjustment by a technician. The steps of the air pressure control method, combining the adjustment of the first regulating valve 133 and the second regulating valve 134, are described in detail below.

[0064] like Figure 3 As shown, in some optional embodiments, the air pressure control method may include:

[0065] S210. Obtain the preset compensation coefficient. And determine the target opening degree of the second regulating valve 134.

[0066] S220. Determine whether a shutdown signal has been received.

[0067] S231. If a stop signal is received, the mode for adjusting the opening of the first regulating valve 133 is set to manual mode in response to the stop signal.

[0068] S232, Adjust the opening of the first regulating valve 133 to zero.

[0069] S233. Set the mode for adjusting the opening of the second regulating valve 134 to manual mode.

[0070] S234. Adjust the second regulating valve 134 to the target opening degree according to the preset opening degree change curve. The preset opening degree change curve can be set according to relevant experiments or the experience of those skilled in the art. This embodiment does not limit the specific changes in the opening degree change curve.

[0071] S235 When the second regulating valve 134 is adjusted to the target opening, the mode for adjusting the opening of the second regulating valve 134 is switched to automatic mode. Based on the pressure difference and the target pressure difference, and based on the first parameter, the opening of the second regulating valve 134 is controlled by a proportional-integral-derivative control algorithm.

[0072] S241. If no shutdown signal is received, the mode for adjusting the opening of the first regulating valve 133 is set to automatic mode, and the mode for adjusting the opening of the second regulating valve 134 is set to automatic mode. The opening of the first regulating valve 133 is controlled according to the pressure difference and the target pressure difference. Furthermore, when the pressure difference is less than or equal to the pressure difference threshold, the second regulating valve 134 is closed, and when the pressure difference is greater than the pressure difference threshold, the second regulating valve 134 is opened.

[0073] This embodiment achieves automated control of the 100g gas pressure in the electrolysis system through clear logical steps and a mode switching mechanism. Upon receiving a shutdown signal, the first regulating valve 133 is automatically switched to manual mode and closed, cutting off the downstream gas supply. Simultaneously, the second regulating valve 134 is smoothly adjusted to the target opening according to a preset opening change curve, avoiding pressure surges caused by sudden valve changes. Once the second regulating valve 134 reaches the target opening, it automatically switches to automatic mode, using a PID algorithm for fine adjustment to stabilize the pressure difference. Furthermore, the system distinguishes between normal and shutdown conditions based on whether a shutdown signal has been received, ensuring precise matching between the control strategy and operational requirements. This embodiment offers advantages such as high automation, stable control, and strong adaptability.

[0074] like Figure 4As shown, the present invention also provides a pressure control device 300 for an electrolysis system 100. The electrolysis system 100 includes an electrolytic cell 110, a first pipe 120, and a second pipe 130. The first electrode chamber 111 of the electrolytic cell 110 is connected to the first pipe 120, and the second electrode chamber 112 of the electrolytic cell 110 is connected to the second pipe 130. The first electrode chamber 111 and the second electrode chamber 112 are separated by an ion exchange membrane. The second pipe 130 includes a first branch pipe 131 and a second branch pipe 132 that are connected to each other. The first branch pipe 131 is used to connect to a first gas compressor 210, and the second branch pipe 132 is used to depressurize. Furthermore, a first regulating valve 133 is provided on the first branch pipe 131, and a second regulating valve 134 is provided on the second branch pipe 132.

[0075] The air pressure control device 300 includes:

[0076] The pressure difference determination unit 310 is configured to detect the air pressure of the first pipe 120 and the second pipe 130, and determine the pressure difference between the second pipe 130 and the first pipe 120.

[0077] The differential pressure control unit 320 is configured to control the opening of the first regulating valve 133 according to the gas pressure difference and the target pressure difference to reduce the deviation between the gas pressure difference and the target pressure difference; and when the gas pressure difference is greater than the differential pressure threshold, to open the second regulating valve 134 to depressurize the second pipeline 130, wherein the differential pressure threshold is greater than the target pressure difference.

[0078] It should be understood that the embodiments of the pneumatic control device 300 and the embodiments of the pneumatic control method described above are based on the same inventive concept. The specific implementation and technical effects of the pneumatic control device 300 can be referred to the relevant descriptions of the embodiments of the pneumatic control method, which will not be repeated here.

[0079] Figure 5 This is a structural schematic diagram of an electronic device 400 provided in an embodiment of the present invention. The specific embodiments of the present invention do not limit the specific implementation of the electronic device. Figure 5 As shown, the electronic device 400 may include: a processor 402, a communications interface 404, a memory 406, and a communications bus 408.

[0080] in:

[0081] The processor 402, communication interface 404, and memory 406 communicate with each other via communication bus 408.

[0082] Communication interface 404 is used to communicate with other electronic devices or servers, such as the aforementioned source device.

[0083] The processor 402 is used to execute the computer software 410, specifically to execute the relevant steps in the embodiments of the above-described air pressure control method.

[0084] Specifically, computer software 410 may include program code, which includes executable instructions, which may be computer operation instructions.

[0085] Processor 402 may be a CPU, an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention. The smart device includes one or more processors, which may be processors of the same type, such as one or more CPUs; or processors of different types, such as one or more CPUs and one or more ASICs.

[0086] Memory 406 is used to store computer software 410. Memory 406 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0087] The computer software 410 may include one or more executable instructions. Specifically, the computer software 410 may use multiple executable instructions to cause the processor 402 to perform the operations corresponding to the air pressure control method described in any of the foregoing embodiments.

[0088] The specific implementation of each step in computer software 410 can be found in the corresponding descriptions of the steps and units in the above method embodiments, and has corresponding beneficial effects, which will not be repeated here. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the devices and modules described above can be referred to the corresponding process descriptions in the foregoing method embodiments, and will not be repeated here.

[0089] This invention also provides a computer storage medium storing a computer program that, when executed by a processor, implements the method described in any of the embodiments of the aforementioned pneumatic control methods. The computer storage medium includes, but is not limited to, compact disc read-only memory (CD-ROM), random access memory (RAM), floppy disk, hard disk, or magneto-optical disk.

[0090] It should be noted that, in this invention, the nouns and pronouns referring to persons are not limited to specific genders. Relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. The term "connection" can be a direct or indirect connection, and this invention does not exclude the possibility that other components are connected between two connected components. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0091] Finally, it should be noted that the above are merely preferred embodiments of the present invention, used only to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A pressure control method for an electrolysis system (100), the electrolysis system (100) comprising an electrolytic cell (110), a first pipe (120) and a second pipe (130), wherein a first electrode chamber (111) of the electrolytic cell (110) is connected to the first pipe (120), and a second electrode chamber (112) of the electrolytic cell (110) is connected to the second pipe (130), wherein the first electrode chamber (111) and the second electrode chamber (112) are separated by an ion exchange membrane, characterized in that, The second pipeline (130) includes a first branch pipe (131) and a second branch pipe (132) that are interconnected. The first branch pipe (131) is used to connect to the first gas compressor (210), and the second branch pipe (132) is used for depressurization. A first regulating valve (133) is provided on the first branch pipe (131), and a second regulating valve (134) is provided on the second branch pipe (132). The method includes: Detect the air pressure of the first pipe (120) and the second pipe (130) to determine the air pressure difference between the second pipe (130) and the first pipe (120); Based on the pressure difference and the target pressure difference, the opening degree of the first regulating valve (133) is controlled to reduce the deviation between the pressure difference and the target pressure difference; and when the pressure difference is greater than the pressure difference threshold, the second regulating valve (134) is opened to depressurize the second pipeline (130), wherein the pressure difference threshold is greater than the target pressure difference.

2. The method according to claim 1, characterized in that, The method further includes: In response to receiving a shutdown signal indicating the shutdown of the electrolysis system (100), the first regulating valve (133) is closed and the second regulating valve (134) is adjusted to the target opening.

3. The method according to claim 2, characterized in that, After adjusting the second regulating valve (134) to the target opening, the method further includes: Based on the pressure difference and the target pressure difference, the opening of the second regulating valve (134) is controlled to reduce the deviation between the pressure difference and the target pressure difference.

4. The method according to claim 2, characterized in that, Before adjusting the second regulating valve (134) to the target opening, the method further includes: The target opening degree is determined based on the current information of the electrolytic cell (110).

5. The method according to claim 4, characterized in that, Determining the target opening degree based on the current information of the electrolytic cell (110) includes: calculating the target opening degree according to the following formula: In the formula, Indicates the target opening degree. The compensation coefficient is represented by n; n represents the number of electrolytic cells (110) included in the electrolysis system (100), wherein the number of electrolytic cells (110) is one or more. This represents the current value of the i-th electrolytic cell (110); This represents the rated current of the i-th electrolytic cell (110).

6. The method according to any one of claims 3-5, characterized in that, The step of controlling the opening of the second regulating valve (134) according to the pressure difference and the target pressure difference includes: controlling the opening of the second regulating valve (134) according to the pressure difference and the target pressure difference, based on a first parameter, through a proportional-integral-derivative control algorithm, wherein the first parameter includes a first proportional coefficient, a first integral coefficient, and a first derivative coefficient; The step of opening the second regulating valve (134) when the pressure difference is greater than the pressure difference threshold includes: when the pressure difference is greater than the pressure difference threshold, controlling the opening degree of the second regulating valve (134) based on the second parameter through the proportional-integral-derivative control algorithm, wherein the second parameter includes a second proportional coefficient, a second integral coefficient and a second derivative coefficient.

7. The method according to claim 6, characterized in that, The absolute value of the first proportional coefficient is greater than the absolute value of the second proportional coefficient, the absolute value of the first integral coefficient is less than the absolute value of the second integral coefficient, and the absolute value of the first differential coefficient is greater than the absolute value of the second differential coefficient.

8. The method according to any one of claims 1-5 or 7, characterized in that, The electrolytic cell (110) is used to electrolyze a sodium chloride solution. When the electrolytic cell (110) is working, the first electrode chamber (111) generates chlorine gas and the second electrode chamber (112) generates hydrogen gas. The target pressure difference is greater than zero.

9. A pressure control device (300) for an electrolysis system (100), the electrolysis system (100) comprising an electrolytic cell (110), a first pipe (120) and a second pipe (130), wherein a first electrode chamber (111) of the electrolytic cell (110) is connected to the first pipe (120), and a second electrode chamber (112) of the electrolytic cell (110) is connected to the second pipe (130), and the first electrode chamber (111) and the second electrode chamber (112) are separated by an ion exchange membrane, characterized in that, The second pipeline (130) includes a first branch pipe (131) and a second branch pipe (132) that are interconnected. The first branch pipe (131) is used to connect to the first gas compressor (210), and the second branch pipe (132) is used for pressure relief. A first regulating valve (133) is provided on the first branch pipe (131), and a second regulating valve (134) is provided on the second branch pipe (132). The device includes: The differential pressure determination unit (310) is configured to detect the air pressure of the first pipe (120) and the second pipe (130) and determine the air pressure difference between the second pipe (130) and the first pipe (120); The differential pressure control unit (320) is configured to control the opening of the first regulating valve (133) according to the gas pressure difference and the target pressure difference to reduce the deviation between the gas pressure difference and the target pressure difference; and when the gas pressure difference is greater than the differential pressure threshold, to open the second regulating valve (134) to depressurize the second pipeline (130), wherein the differential pressure threshold is greater than the target pressure difference.

10. An electronic device (400), comprising: The processor (402), communication interface (404), memory (406), and communication bus (408) communicate with each other through the communication bus (408). The memory (406) is used to store at least one executable instruction that causes the processor (402) to perform an operation corresponding to the method as described in any one of claims 1-8.

11. A computer storage medium having a computer program stored thereon, which, when executed by a processor, implements the method as described in any one of claims 1-8.

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