Control method and system for reducing hydrogen content in anode oxygen of proton exchange membrane electrolytic cell

Abstract

The invention provides a control method and system for reducing the hydrogen content in anode oxygen of a proton exchange membrane electrolytic bath, and the control method comprises the steps: calling a corresponding control scheme from a pre-configured control library according to the parameter data of the proton exchange membrane electrolytic bath; wherein the control mode of the control scheme in the control library comprises the steps that the current density is slowly increased in a stepped mode, and / or the solution conductivity is increased; wherein the slow stepped increasing of the current density is controlled by configuring an adjusting speed and an adjusting step length, and the increasing of the solution conductivity is controlled by configuring an adding time interval and adding parameters. According to the control method for reducing the hydrogen content in the anode oxygen of the proton exchange membrane electrolytic cell, the adjustment control scheme is obtained by analyzing accident data, and the adjustment control scheme is tested and evaluated, so that adjustment control is performed before subsequent accidents occur, and the accidents are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of proton exchange membrane electrolyzers, and particularly to a control method and system for reducing the hydrogen content in oxygen at the anode of a proton exchange membrane electrolyzer. Background Art

[0002] During the testing of a proton exchange membrane electrolyzer, the hydrogen content in oxygen is an important safety indicator.

[0003] Proton exchange membrane electrolyzers have the advantages of high current density, fast system response, high gas purity, etc., and rely on H + transport to carry out electrolysis operation, and the middle proton membrane allows the permeation and transport of H+. During the actual operation process, due to the influence of untimely H + transport and reverse current, the situation that hydrogen is contained in oxygen will occur, which is also one of the problems that proton exchange membrane electrolyzers urgently need to solve. This is a major safety issue. If the hydrogen concentration in the hydrogen-oxygen mixture reaches the explosion limit of 4%, an explosion may occur. This problem is particularly prominent when the operating current density of the electrolyzer is small, the thickness of the proton exchange membrane is thin, and the operating pressure of H2 is high. Summary of the Invention

[0004] One of the purposes of the present invention is to provide a control method and system for reducing the hydrogen content in oxygen at the anode of a proton exchange membrane electrolyzer. By analyzing accident data to obtain an adjustment control scheme, and testing and evaluating the adjustment control scheme, subsequent adjustment control is carried out before an accident occurs to avoid the occurrence of the accident.

[0005] A control method for reducing the hydrogen content in oxygen at the anode of a proton exchange membrane electrolyzer provided by an embodiment of the present invention includes:

[0006] According to the parameter data of the proton exchange membrane electrolyzer, retrieve the corresponding control scheme from a pre-configured control library;

[0007] Among them, the control methods of the control schemes in the control library include: slowly increasing the current density in a stepped manner, and / or increasing the solution conductivity; among them, slowly increasing the current density in a stepped manner is controlled by configuring the adjustment speed and adjustment step, and increasing the solution conductivity is controlled by configuring the addition time interval and addition parameters.

[0008] Preferably, the construction steps of the control library are as follows:

[0009] Retrieve the accident data of proton exchange membrane electrolyzers with various different parameter data;

[0010] Analyze the accident data to determine the control scheme of the proton exchange membrane electrolyzer;

[0011] When running the adjustment control scheme, collect gas and conduct a gas chromatography test to measure the hydrogen content in oxygen and obtain the change data of the hydrogen content in oxygen.

[0012] Based on the change data of the hydrogen content in oxygen and the electrochemistry performance test parameters, determine the test result of the control scheme.

[0013] Based on the test result of the adjustment control scheme, determine the control scheme corresponding to the proton exchange membrane electrolyzer with different parameter data.

[0014] Preferably, the electrolytic solution of the proton exchange membrane electrolyzer is ultrapure water or 0.05 mol / L Na2SO4 solution.

[0015] Preferably, the size of the commercial proton exchange membrane electrolyzer is 3*4 cm 2 .

[0016] Preferably, the set temperature of the proton exchange membrane electrolyzer is 40 degrees Celsius.

[0017] Preferably, the electrolysis current density of the proton exchange membrane electrolyzer is any one of: 0.5 A / cm 2 , 1 A / cm 2 , 1.5 A / cm 2 , 2 A / cm 2 , 2.5 A / cm 2 among them.

[0018] Preferably, the set flow rate of the proton exchange membrane electrolyzer is any one of: 40 mL / min, 60 mL / min, 80 mL / min, 100 mL / min.

[0019] Preferably, the electrochemistry performance test parameters include: LSV test characterization parameters and / or EIS test characterization parameters.

[0020] Preferably, start the gas collection test after a preset time threshold under various working conditions of running the adjustment control scheme.

[0021] The present invention also provides a control system for reducing the hydrogen content in oxygen at the anode of a proton exchange membrane electrolyzer, including: a control module, and the control module retrieves the corresponding control scheme from a pre-configured control library according to the parameter data of the proton exchange membrane electrolyzer;

[0022] Among them, the control methods of the control schemes in the control library include: slowly increasing the current density in a stepped manner, and / or increasing the solution conductivity; among them, slowly increasing the current density in a stepped manner is controlled by configuring the adjustment speed and adjustment step size, and increasing the solution conductivity is controlled by configuring the addition time interval and addition parameters.

[0023] Other features and advantages of the present invention will be set forth in the following description, and in part will be obvious from the description, or may be learned by practice of the present invention. The objectives and other advantages of the present invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

[0024] The technical solution of the present invention will be further described in detail below through the accompanying drawings and embodiments. Description of the Drawings

[0025] The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the drawings:

[0026] Figure 1 It is a schematic diagram of a control method for reducing the hydrogen content in the anode oxygen of a proton exchange membrane electrolyzer in an embodiment of the present invention;

[0027] Figure 2 It is a data graph of the hydrogen content in oxygen obtained by electrolyzing ultrapure water in a proton exchange membrane electrolyzer of the present invention under different current densities and flow rates;

[0028] Figure 3 It is a data graph of the hydrogen content in oxygen obtained by electrolyzing 0.05 mol / L Na2SO4 solution in a proton exchange membrane electrolyzer of the present invention under different current densities and flow rates;

[0029] Figure 4 It is a schematic diagram of the method of directly giving the target current density (a) and slowly increasing the current density step by step (b) in the proton exchange membrane electrolyzer of the present invention;

[0030] Figure 5 It is a data graph of the hydrogen content in oxygen obtained by electrolyzing ultrapure water in a proton exchange membrane electrolyzer of the present invention under different current densities and flow rates by directly giving the target current density;

[0031] Figure 6 It is a data graph of the hydrogen content in oxygen obtained by electrolyzing ultrapure water in a proton exchange membrane electrolyzer of the present invention under different current densities and flow rates by slowly increasing the current density step by step. Detailed Embodiments

[0032] The following describes the preferred embodiments of the present invention with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not intended to limit the present invention.

[0033] The embodiment of the present invention provides a control method for reducing the hydrogen content in the anode oxygen of a proton exchange membrane electrolyzer, including:

[0034] Retrieve the corresponding control scheme from the pre-configured control library according to the parameter data of the proton exchange membrane electrolyzer;

[0035] Among them, the control methods of the control schemes in the control library include: slowly increasing the current density in a stepwise manner, and / or increasing the solution conductivity; among them, slowly increasing the current density in a stepwise manner is controlled by configuring the adjustment speed and adjustment step size, and increasing the solution conductivity is controlled by configuring the addition time interval and addition parameters. The adjustment step size is the difference between the adjusted current density and the pre-adjustment current density in one adjustment operation, and the adjustment speed is the time difference between two adjacent adjustments; the addition time interval is the time difference between two adjacent additions; the addition parameters include parameters such as the type of solution added and the volume added.

[0036] Among them, as Figure 1 , the construction steps of the control library are as follows:

[0037] Step 1: Retrieve the accident data of proton exchange membrane electrolyzers with different parameter data; the parameter data includes: electrolyzer size, electrolysis current density, set flow rate, solution type and concentration, etc.;

[0038] Step 2: Analyze the accident data to determine the control scheme of the proton exchange membrane electrolyzer; analyzing the accident data mainly involves counting the accident data, the parameter data of the proton exchange membrane electrolyzer before the accident and the hydrogen content in oxygen; thereby determining the adjustment timing; for the situation where the hydrogen content in oxygen cannot be directly measured, it can be indirectly guided by the operation time, that is, the adjustment timing is judged by monitoring the operation time; the above judgment of the adjustment timing can be applied to the actual operation process of the electrolyzer for regulation;

[0039] Step 3: When running the adjustment control scheme, collect gas and perform gas chromatography tests to measure the hydrogen content in oxygen and obtain the change data of the hydrogen content in oxygen;

[0040] Step 4: Determine the test result of the control scheme based on the change data of the hydrogen content in oxygen and the electrochemistry performance test parameters; the tests of the change data of the hydrogen content in oxygen and the electrochemistry performance test parameters are specifically described in the subsequent experimental part of the present invention. In addition, the test results of the control scheme include: the decline rate of the hydrogen content in oxygen, the lowest value after the decline, and the rise rate of the hydrogen content in oxygen at a certain time (any one of 10 minutes to 30 minutes) after the execution of the control scheme is completed, etc.;

[0041] Step 5. Based on the test results of the adjustment control scheme, determine the corresponding control scheme for each proton exchange membrane electrolyzer with different parameter data. Quantify the test results according to the quantization model corresponding to the test results of each adjustment control scheme, and then, based on the sum of the products of the quantified values and the pre-configured weights, use it as the evaluation value of the control scheme; associate the control scheme with the highest evaluation value with the adjustment timing to form a regulation item in the control library; when the control library is applied to actual use, extract the characteristics of the parameter data, and match the extracted characteristic parameter set with the quantified standard parameter set corresponding to the adjustment timing, and retrieve the control scheme associated with the matched standard parameter set.

[0042] Among them, the electrolytic solution of the proton exchange membrane electrolyzer is ultrapure water and 0.05 mol / L Na2SO4 solution. The size of the commercial proton exchange membrane electrolyzer is 3*4 cm 2 . The set temperature of the proton exchange membrane electrolyzer is 40 degrees Celsius. The electrolysis current density of the proton exchange membrane electrolyzer is: 0.5 A / cm 2 , 1 A / cm 2 , 1.5 A / cm 2 , 2 A / cm 2 , 2.5 A / cm 2 any one of them. The set flow rate of the proton exchange membrane electrolyzer is: any one of 40 mL / min, 60 mL / min, 80 mL / min, and 100 mL / min. The electrochemistry performance test parameters include: LSV test characterization parameters and / or EIS test characterization parameters.

[0043] For the understanding of the control method for reducing the hydrogen content in the anode oxygen of the proton exchange membrane electrolyzer of the present invention, its feasibility needs to be determined first, and the feasibility can be verified through the following experiments. The specific experimental method is as follows: Select a commercial proton exchange membrane electrolyzer with a model of 3*4 cm 2 , that is, it contains three layers, and the area of each layer is 4 cm 2 . The following steps are included: S1. Before the gas collection test, perform an electrochemistry performance test on the proton exchange membrane electrolyzer; S2. Perform a gas collection test on the proton exchange membrane electrolyzer in different electrolytic solutions, different current supply methods, different current densities, and flow rate modes. In step S1, adjust the inlet temperature of the proton exchange membrane electrolyzer to 40 degrees Celsius, feed the liquid, and after running for 10 minutes, test its electrochemistry performance (LSV, EIS) to ensure the consistency of each test condition. In the test process of step S2, perform gas collection in different electrolytic solutions, different current supply methods, different current densities, and flow rate modes. The electrolytic solutions are: ultrapure water and 0.05 mol / L Na2SO4 solution; the current supply methods are: directly giving the target current density method and slowly increasing the current density in a stepwise manner; the electrolysis current density is: 0.5 A / cm2 、1 A / cm 2 、1.5 A / cm 2 、2 A / cm 2 、2.5 A / cm 2 ; The set flow rates are: 40 mL / min, 60 mL / min, 80 mL / min, 100 mL / min. After each operating condition runs for 5 min, gas collection starts, and the collected gas is the gas at the oxygen outlet end. It also includes step S3, where after gas collection is completed, gas chromatography (GC) testing is performed. In step S3, after gas collection is completed for each operating condition of current density and flow rate, gas chromatography (GC) testing is carried out to analyze its gas components, and the hydrogen content in oxygen is calculated.

[0044] The electrolysis experiment with ultrapure water as the electrolyte solution is as follows:

[0045] Install the proton exchange membrane electrolyzer into the test platform. The proton exchange membrane electrolyzer used in the present invention is a commercial proton exchange membrane electrolyzer (3 * 4 cm 2 ). Adjust the inlet temperature of the proton exchange membrane electrolyzer to 40 degrees Celsius, and the inlet liquid is ultrapure water. After it runs for 10 min, test its electrochemical performance (LSV, E IS) to ensure the consistency of each test condition. The test method is to perform gas collection under different current density and flow rate modes. The electrolysis current density is: 0.5 A / cm 2 、1 A / cm 2 、1.5 A / cm 2 、2 A / cm 2 、2.5 A / cm 2 ; The set flow rates are: 40 mL / min, 60 mL / min, 80 mL / min, 100 mL / min. After each operating condition runs for 5 min, gas collection starts, and the collected gas is the gas at the oxygen outlet end. After gas collection is completed, gas chromatography (GC) testing is performed to analyze its gas components, and the hydrogen content in oxygen is calculated. The test results are as Figure 2 shown. It can be seen from the figure the hydrogen content in oxygen under different current density and flow rate conditions when the inlet liquid is ultrapure water. It can be concluded that current density and flow rate have an impact on the hydrogen content in oxygen.

[0046] The electrolysis experiment with 0.05 mol / L Na2SO4 solution as the electrolyte solution is as follows:

[0047] Install the proton exchange membrane electrolyzer into the test platform. The proton exchange membrane electrolyzer used in the present invention is a commercial proton exchange membrane electrolyzer (3 * 4 cm 2)。Adjust the inlet temperature of the proton exchange membrane electrolyzer to 40 °C, and the inlet liquid is 0.05 mol / L Na2SO4 solution. Let it run for 10 min and then test its electrochemical performance (LSV, EIS) to ensure the consistency of each test condition. The test method is to collect gas under different current density and flow rate modes. The electrolysis current density is: 0.5 A / cm 2 、1 A / cm 2 、1.5 A / cm 2 、2 A / cm 2 、2.5 A / cm 2 ; Set the flow rate to: 40 mL / min, 60 mL / min, 80 mL / min, 100 mL / min. After each working condition runs for 5 min, start collecting gas. The collected gas is the gas at the oxygen outlet end. After gas collection is completed, perform gas chromatography (GC) test to analyze its gas composition and calculate the hydrogen content in oxygen. The test results are as Figure 3 shown. It can be seen from the figure the hydrogen content in oxygen under different current density and flow rate conditions when the inlet liquid is 0.05 mol / L Na2SO4 solution. Compared with Figure 2 , it can be concluded that while it is proved that the current density and flow rate do have an impact on the hydrogen content in oxygen, adding a little Na + to the solution to increase the solution conductivity, thereby reducing the hydrogen content in oxygen at the anode of the proton exchange membrane electrolyzer, also proves the effectiveness of this method.

[0048] The electrolysis experiment under the direct-giving target current density method is as follows:

[0049] Install the proton exchange membrane electrolyzer on the test platform. The proton exchange membrane electrolyzer used is a commercial proton exchange membrane electrolyzer (3*4 cm 2 ). Adjust the inlet temperature of the proton exchange membrane electrolyzer to 40 °C, and the inlet liquid is ultrapure water. Let it run for 10 min and then test its electrochemical performance (LSV, EIS) to ensure the consistency of each test condition. The current-giving method is the direct-giving target current density method. The schematic diagram is as Figure 4 (a) shown. Collect gas under different current density and flow rate modes. The electrolysis current density is: 0.5 A / cm 2 、1 A / cm 2 、1.5 A / cm 2 、2 A / cm 2 、2.5 A / cm 2; The set flow rates are: 40 mL / min, 60 mL / min, 80 mL / min, 100 mL / min. After each working condition runs for 5 min, gas collection starts. The collected gas is the gas at the oxygen outlet end. After gas collection is completed, gas chromatography (GC) testing is carried out to analyze its gas components, and the hydrogen content in oxygen is calculated. The test results are as Figure 5 shown. It can be seen from the figure the hydrogen content in oxygen under different current density and flow rate conditions when the current supply method is the direct supply of the target current density method.

[0050] The experiment of the slow stepwise increase of the current density is as follows:

[0051] Install the proton exchange membrane electrolyzer into the test platform. The proton exchange membrane electrolyzer used is a commercial proton exchange membrane electrolyzer (3*4 cm 2 ). Adjust the inlet liquid temperature of the proton exchange membrane electrolyzer to 40 °C, and the inlet liquid is ultrapure water. After it runs for 10 min, test its electrochemical performance (LSV, EIS) to ensure the consistency of each test condition. The current supply method is the slow stepwise increase of the current density. The schematic diagram is as Figure 4 (b) shown. Gas collection is carried out under different current density and flow rate modes. The electrolysis current density is: 0.5 A / cm 2 , 1 A / cm 2 , 1.5 A / cm 2 , 2 A / cm 2 , 2.5 A / cm 2 ; The set flow rates are: 40 mL / min, 60 mL / min, 80 mL / min, 100 mL / min. After each working condition runs for 5 min, gas collection starts. The collected gas is the gas at the anode oxygen outlet end. After gas collection is completed, gas chromatography (GC) testing is carried out to analyze its gas components, and the hydrogen content in oxygen is calculated. The test results are as Figure 6 shown. It can be seen from the figure the hydrogen content in oxygen under different current density and flow rate conditions when the current supply method is the slow stepwise increase of the current density. Compared with Figure 5 it, the conclusion can be drawn that while it is proved that the current density and flow rate have an impact on the hydrogen content in oxygen, the slow stepwise increase of the current density method reduces the hydrogen content in the anode oxygen of the proton exchange membrane electrolyzer, proving the effectiveness of this method.

[0052] To ensure the accuracy of the test, in one embodiment, gas collection testing starts after a preset time threshold after running various working conditions of the operation adjustment control scheme. Among them, the time threshold is any value from 1 min to 10 min.

[0053] In one embodiment, based on the hydrogen content in oxygen change data and the electrochemical performance test parameters, determine the test results of the adjustment control scheme, including:

[0054] Feature extraction is performed on the hydrogen content change data in oxygen and the electrochemical performance test parameters to obtain change characteristic parameters and performance characteristic parameters; the change characteristic parameters include: the change rate at each preset time interval, etc.; the performance characteristic parameters include: electrolysis efficiency, etc.;

[0055] Determine the quantitative evaluation value of each change characteristic parameter and performance characteristic parameter according to the pre-configured quantization table corresponding to each change characteristic parameter and performance characteristic parameter;

[0056] The quantitative evaluation value is used as the test result of the adjustment control scheme. In this embodiment, the quantitative evaluation step is embedded in the test result, so that the scheme of the adjustment item in the control library can be directly selected according to the quantitative evaluation value in the test result.

[0057] In order to ensure accurate and effective control; in one embodiment, the control method for reducing the hydrogen content in the anode oxygen of the proton exchange membrane electrolyzer also includes:

[0058] During the regulation process, when the regulation is performed by increasing the conductivity of the solution, an adjustment solution tank is arranged outside the electrolytic cell, a solution for regulation is prepared in the adjustment solution tank, and the solution in the adjustment solution tank is extracted by a pump, and the solution is injected into the electrolytic cell by spraying at the target position;

[0059] The steps for determining the target position are as follows: the anode image is acquired through the image acquisition module, the anode image is matched with the standard image in the pre-configured target position determination library, and the position associated with the matched standard image is used as the target position. The target position determination library is configured for pre-analysis, and each standard image in the target position determination library is associated with a position; the position specifically corresponds to the value of each adjustable parameter of the adjustable nozzle.

[0060] The present invention also provides a control system for reducing the hydrogen content in anode oxygen of a proton exchange membrane electrolyzer, comprising: a control module, the control module calling a corresponding control scheme from a pre-configured control library according to parameter data of the proton exchange membrane electrolyzer;

[0061] Among them, the control methods of the control schemes in the control library include: slowly and step-by-step increasing the current density, and / or, increasing the solution conductivity; wherein, slowly and step-by-step increasing the current density is controlled by configuring the adjustment speed and the adjustment step size, and increasing the solution conductivity is controlled by configuring the addition time interval and the addition parameters.

[0062] The electrolytic solution of the proton exchange membrane electrolyzer is ultrapure water and 0.05 mol / L Na2SO4 solution. The size of the commercial proton exchange membrane electrolyzer is 3*4 cm 2。The set temperature of the proton exchange membrane electrolyzer is 40 degrees Celsius. The electrolysis current density of the proton exchange membrane electrolyzer is any one of: 0.5 A / cm 2 , 1 A / cm 2 , 1.5 A / cm 2 , 2 A / cm 2 , 2.5 A / cm 2 . The set flow rate of the proton exchange membrane electrolyzer is any one of: 40 mL / min, 60 mL / min, 80 mL / min, 100 mL / min. The electrochemistry performance test parameters include: LSV test characterization parameters and / or EIS test characterization parameters.

[0063] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.

Claims

1. A control method for reducing the hydrogen content in the anode oxygen of a proton exchange membrane electrolyzer, characterized in that, Including: Retrieve the corresponding control scheme from a pre-configured control library according to the parameter data of the proton exchange membrane electrolyzer; Among them, the control methods of the control schemes in the control library include: slowly increasing the current density in a stepwise manner, and / or increasing the solution conductivity; among them, slowly increasing the current density in a stepwise manner is controlled by configuring the adjustment speed and adjustment step, and increasing the solution conductivity is controlled by configuring the addition time interval and addition parameters.

2. The control method for reducing the hydrogen content in the oxygen at the anode of a proton exchange membrane electrolyzer according to claim 1, wherein The steps for constructing the control library are as follows: Retrieve the accident data of proton exchange membrane electrolyzers with different parameter data; Analyze the accident data to determine the control scheme of the proton exchange membrane electrolyzer; When operating and adjusting the control scheme, collect gas and conduct a gas chromatography test to measure the hydrogen content in oxygen and obtain the change data of the hydrogen content in oxygen; Based on the change data of the hydrogen content in oxygen and the electrochemistry performance test parameters, determine the test results of the control scheme; Based on the test results of the adjusted control scheme, determine the control scheme corresponding to the proton exchange membrane electrolyzer with different parameter data.

3. The control method for reducing the hydrogen content in the anode oxygen of a proton exchange membrane electrolyzer according to claim 2, characterized in that, The electrolytic solution of the proton exchange membrane electrolyzer is ultrapure water and 0.05mol / L Na2SO4 solution.

4. The control method for reducing the hydrogen content in the anode oxygen of a proton exchange membrane electrolyzer according to claim 2, characterized in that, The size of the proton exchange membrane electrolyzer is 3 * 4 cm 2 .

5. The control method for reducing the hydrogen content in the anode oxygen of a proton exchange membrane electrolyzer according to claim 2, characterized in that, The set temperature of the proton exchange membrane electrolyzer is 40 degrees Celsius.

6. The control method for reducing the hydrogen content in the oxygen at the anode of a proton exchange membrane electrolyzer according to claim 2, characterized in that, The electrolysis current density of the proton exchange membrane electrolyzer is any one of: 0.5 A / cm 2 , 1 A / cm 2 , 1.5 A / cm 2 , 2 A / cm 2 , 2.5 A / cm 2 .

7. The control method for reducing the hydrogen content in the oxygen at the anode of a proton exchange membrane electrolyzer according to claim 2, characterized in that, The set flow rate of the proton exchange membrane electrolyzer is any one of 40mL / min, 60mL / min, 80mL / min, and 100mL / min.

8. The control method for reducing the hydrogen content in the anode oxygen of a proton exchange membrane electrolyzer according to claim 2, characterized in that, The electrochemistry performance test parameters include: LSV test characterization parameters and / or EIS test characterization parameters.

9. The control method for reducing the hydrogen content in the anode oxygen of a proton exchange membrane electrolyzer according to claim 2, characterized in that Start the gas collection test after a preset time threshold for various working conditions of operating and adjusting the control scheme.

10. A control system for reducing the hydrogen content in the anode oxygen of a proton exchange membrane electrolyzer, characterized in that, Including: A control module that retrieves the corresponding control scheme from a pre-configured control library according to the parameter data of the proton exchange membrane electrolyzer; Among them, the control methods of the control schemes in the control library include: slowly increasing the current density in a stepwise manner, and / or increasing the solution conductivity; among them, slowly increasing the current density in a stepwise manner is controlled by configuring the adjustment speed and adjustment step, and increasing the solution conductivity is controlled by configuring the addition time interval and addition parameters.

Images