CN-121977647-A - Electrolytic tank performance evaluation and operation load optimization method, equipment and medium

CN121977647ACN 121977647 ACN121977647 ACN 121977647ACN-121977647-A

Abstract

The application discloses a method, equipment and medium for evaluating the performance and optimizing the running load of an electrolytic cell, and relates to the technical field of electrolytic cell evaluation; the low-load test data comprise hydrogen purity, oxygen purity, cell voltage of each cell, actual measurement circulating alkali concentration and test duration, membrane pinhole indexes are calculated according to the hydrogen purity, the oxygen purity and the cell voltage of all the cells, coating attenuation indexes are calculated according to the cell voltage of all the cells, the actual measurement circulating alkali concentration and the test duration, the performance of the cell is evaluated according to the membrane pinhole indexes and the coating attenuation indexes to obtain a health comprehensive index of the cell, an optimization decision is made on the operation load of the cell according to the health comprehensive index of the cell, and an optimization decision measure of the cell is determined.

Inventors

MA LIWEN
DONG HONGBO
CHEN XIAOXIAO
ZHENG WEI
LI LEI
DONG XUE
ZHANG YIN

Assignees

滨化集团股份有限公司
山东滨华氢能源有限公司
滨化技术有限公司

Dates

Publication Date: 20260505
Application Date: 20260204

Claims (10)

1. An electrolytic cell performance evaluation and operation load optimization method, characterized in that the electrolytic cell performance evaluation and operation load optimization method comprises: obtaining low-load test data of an electrolytic cell in a low-load running state, wherein the low-load test data comprise hydrogen purity, oxygen purity, cell voltage of each cell, actual measurement circulating alkali concentration and test duration; Calculating a membrane pinhole index according to the hydrogen purity, the oxygen purity and the cell voltages of all the cell cells; Calculating a coating attenuation index according to the cell voltages of all the cell cells, the actually measured circulating alkali concentration and the test duration; Evaluating the performance of the electrolytic cell according to the membrane pinhole index and the coating attenuation index to obtain a comprehensive health index of the electrolytic cell; And carrying out optimization decision on the running load of the electrolytic tank according to the health comprehensive index of the electrolytic tank, and determining the optimization decision measure of the electrolytic tank.
2. The method for evaluating the performance and optimizing the operation load of an electrolytic cell according to claim 1, wherein the calculation of the membrane pinhole index based on the hydrogen purity, the oxygen purity, and the cell voltages of all the cells comprises: calculating the deviation degree of the hydrogen purity according to the hydrogen purity and the hydrogen purity reference value; calculating the deviation degree of the oxygen purity according to the oxygen purity and the oxygen purity reference value; Determining a maximum voltage deviation value according to the absolute value of the difference value between the cell voltages of all the cell cells and the cell voltage reference value; The membrane pinhole index is calculated from the hydrogen purity bias, the oxygen purity bias, and the maximum voltage bias value.
3. The method for evaluating the performance and optimizing the operating load of an electrolytic cell according to claim 2, wherein the calculation formula of the membrane pinhole index is as follows: ; Wherein, the Is a membrane pinhole index; 、、 Is a weight coefficient; is the degree of deviation of the purity of the hydrogen; =99.995% is a hydrogen purity reference value; is the degree of deviation of oxygen purity; Is an oxygen purity reference value; Is the maximum voltage deviation value; Is the reference voltage.
4. The method for evaluating the performance and optimizing the operating load of an electrolytic cell according to claim 1, wherein the method for evaluating the performance and optimizing the operating load of an electrolytic cell further comprises: and judging the film pinhole state according to the film pinhole index and the set film pinhole grade range, wherein the film pinhole state comprises a film-free pinhole, a micro-film pinhole, a local film pinhole and a penetrating film pinhole.
5. The method for evaluating the performance and optimizing the operating load of an electrolytic cell according to claim 1, wherein the calculation formula of the coating decay index is as follows: ; Wherein, the Is the coating attenuation index; in order to be an average voltage offset rate, Is the first Cell voltages of the individual cell cells, Is the total number of cell slots; is a voltage offset rate reference value; Is the measured circulating alkali concentration; to design the circulating alkali concentration; cell voltage averages for all cell cells; Is the theoretical decomposition voltage; 、、 is a weight coefficient.
6. The method for evaluating the performance and optimizing the operating load of an electrolytic cell according to claim 1, wherein the method for evaluating the performance and optimizing the operating load of an electrolytic cell further comprises: the low-load test data also comprises temperature distribution data of the electrolytic cell, and when the temperature distribution data of the electrolytic cell is larger than a set temperature threshold value, the electrolytic cell is cooled.
7. The method for evaluating the performance and optimizing the operating load of an electrolytic cell according to claim 1, wherein the calculation formula of the health integrated index is as follows: ; Wherein, the Is the health comprehensive index of the electrolytic tank; Respectively weighing film pinholes and coating layers; Representing to take the minimum value; Is a membrane pinhole index; Is the coating decay index.
8. The method for evaluating the performance and optimizing the operation load of an electrolytic cell according to claim 1, wherein the method for optimizing the operation load of the electrolytic cell according to the health integrated index of the electrolytic cell, and determining the optimization decision measure of the electrolytic cell, comprises the following steps: When the health comprehensive index of the electrolytic cell is within the range of (0.9, 1.0), the optimization decision-making measure of the electrolytic cell comprises recommending that the load is (95%, 100% ], and the optimization measure is operated with maximum efficiency; when the health comprehensive index of the electrolytic tank is within the range of (0.7,0.9), the optimization decision-making measure of the electrolytic tank comprises that the recommended load is (85 percent, 95 percent), and the optimization measure is that the current density is less than or equal to 4000A/m 2 ; When the health comprehensive index of the electrolytic tank is within the range of (0.5,0.7), the optimization decision-making measure of the electrolytic tank comprises that the recommended load is (70 percent, 85 percent) and the optimization measure is to strengthen the temperature monitoring; when the health comprehensive index of the electrolytic tank is within the range of (0.3, 0.5), the optimization decision-making measure of the electrolytic tank comprises that the recommended load is (50%, 70% ], and the optimization measure is the load-reducing operation; When the health comprehensive index of the electrolytic tank is not more than 0.3, the optimization decision-making measure of the electrolytic tank comprises the recommended load is not more than 50%, and the optimization measure is immediate soft stop.
9. A computer device comprising a memory, a processor and a computer program stored on the memory and capable of running on the processor, characterized in that the processor executes the computer program to implement the method for cell performance assessment and operation load optimization of any one of claims 1-8.
10. A computer readable storage medium having stored thereon a computer program, characterized in that the computer program, when executed by a processor, implements the method for cell performance evaluation and operational load optimization according to any one of claims 1-8.

Description

Electrolytic tank performance evaluation and operation load optimization method, equipment and medium Technical Field The application relates to the technical field of electrolytic tank assessment, in particular to an electrolytic tank performance assessment and operation load optimization method, equipment and medium. Background At present, after the electrolytic tank is abnormal in the high-load operation process, the load is reduced or stopped for maintenance. During the repair of the electric tank, the defect is seriously damaged under high load. If the defect of the electric tank can be found as soon as possible, the electric tank can be prevented from being further deteriorated as soon as possible for maintenance. At present, two testing methods of high-load testing and off-line testing exist, but the testing method has the following two defects that 1) the high-load testing risk is that the full-load testing accelerates the performance to decay, and increases the risk of membrane electrode damage, and 2) the off-line testing loss is that the production is interrupted due to shutdown detection, and the average loss of the production energy is 15-20%. Therefore, there is a need for an electrolyzer performance assessment and operating load optimization method that achieves accurate performance assessment while maintaining continuous production. Disclosure of Invention The application aims to provide a method, equipment and medium for evaluating the performance and optimizing the running load of an electrolytic cell, which can realize accurate evaluation of the performance of the electrolytic cell while maintaining continuous production. In order to achieve the above object, the present application provides the following solutions: in a first aspect, the present application provides a method for cell performance assessment and operational load optimization comprising: obtaining low-load test data of an electrolytic cell in a low-load running state, wherein the low-load test data comprise hydrogen purity, oxygen purity, cell voltage of each cell, actual measurement circulating alkali concentration and test duration; Calculating a membrane pinhole index according to the hydrogen purity, the oxygen purity and the cell voltages of all the cell cells; Calculating a coating attenuation index according to the cell voltages of all the cell cells, the actually measured circulating alkali concentration and the test duration; Evaluating the performance of the electrolytic cell according to the membrane pinhole index and the coating attenuation index to obtain a comprehensive health index of the electrolytic cell; And carrying out optimization decision on the running load of the electrolytic tank according to the health comprehensive index of the electrolytic tank, and determining the optimization decision measure of the electrolytic tank. Optionally, calculating the membrane pinhole index according to the hydrogen purity, the oxygen purity and the cell voltages of all the cell, wherein the method specifically comprises the following steps: calculating the deviation degree of the hydrogen purity according to the hydrogen purity and the hydrogen purity reference value; calculating the deviation degree of the oxygen purity according to the oxygen purity and the oxygen purity reference value; Determining a maximum voltage deviation value according to the absolute value of the difference value between the cell voltages of all the cell cells and the cell voltage reference value; The membrane pinhole index is calculated from the hydrogen purity bias, the oxygen purity bias, and the maximum voltage bias value. Alternatively, the calculation formula of the film pinhole index is as follows: ; Wherein, the Is a membrane pinhole index;、、 Is a weight coefficient; is the degree of deviation of the purity of the hydrogen; =99.995% is a hydrogen purity reference value; is the degree of deviation of oxygen purity; Is an oxygen purity reference value; Is the maximum voltage deviation value; Is the reference voltage. Optionally, the method for evaluating the performance of the electrolytic cell and optimizing the running load further comprises the following steps: and judging the film pinhole state according to the film pinhole index and the set film pinhole grade range, wherein the film pinhole state comprises a film-free pinhole, a micro-film pinhole, a local film pinhole and a penetrating film pinhole. Alternatively, the coating decay index is calculated as follows: ; Wherein, the Is the coating attenuation index; in order to be an average voltage offset rate, Is the firstCell voltages of the individual cell cells,Is the total number of cell slots; is a voltage offset rate reference value; Is the measured circulating alkali concentration; to design the circulating alkali concentration; cell voltage averages for all cell cells; Is the theoretical decomposition voltage; 、、 is a weight coefficient. Optionally, the method