CN117928843A - Hydrogen leakage detection method and device for electrolytic cell and electrolytic cell - Google Patents
Hydrogen leakage detection method and device for electrolytic cell and electrolytic cell Download PDFInfo
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 174
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 174
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 171
- 238000001514 detection method Methods 0.000 title claims abstract description 110
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 153
- 230000002159 abnormal effect Effects 0.000 claims abstract description 137
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- 230000005856 abnormality Effects 0.000 claims abstract description 14
- 238000012546 transfer Methods 0.000 claims description 32
- 238000004590 computer program Methods 0.000 claims description 9
- 150000002431 hydrogen Chemical class 0.000 claims description 5
- 238000003745 diagnosis Methods 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000012528 membrane Substances 0.000 description 16
- 238000003487 electrochemical reaction Methods 0.000 description 12
- 238000012544 monitoring process Methods 0.000 description 9
- 238000004891 communication Methods 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 4
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- 239000012466 permeate Substances 0.000 description 3
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- 239000007806 chemical reaction intermediate Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
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- C25B1/04—Hydrogen or oxygen by electrolysis of water
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- C25B15/00—Operating or servicing cells
- C25B15/02—Process control or regulation
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- C25B15/00—Operating or servicing cells
- C25B15/02—Process control or regulation
- C25B15/023—Measuring, analysing or testing during electrolytic production
- C25B15/025—Measuring, analysing or testing during electrolytic production of electrolyte parameters
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- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
- C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
- G01M3/18—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/186—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for containers, e.g. radiators
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Abstract
The invention provides a hydrogen leakage detection method and device for an electrolytic cell and the electrolytic cell. The hydrogen leakage detection method of the electrolytic cell comprises the following steps: during the operation process of the electrolytic tank, the cell voltage of each electrolytic cell in the electrolytic tank is obtained; according to the cell voltage meeting the voltage abnormality condition, marking the electrolysis cell corresponding to the cell voltage as an abnormal electrolysis cell; after the electrolytic tank is stopped, carrying out electrochemical impedance detection on the abnormal electrolytic cell to obtain actual electrochemical impedance data; and judging whether hydrogen leakage occurs in the abnormal electrolysis cell according to the actual electrochemical impedance data. According to the hydrogen leakage detection method and device for the electrolytic tank and the electrolytic tank, through introducing an electrochemical impedance detection technology, a hydrogen leakage diagnosis means which is more direct, accurate and not influenced by external conditions is provided, and the safety and efficiency of the electrolytic tank are improved.
Description
Technical Field
The invention relates to the technical field of electrolysis, in particular to a hydrogen leakage detection method and device for an electrolytic cell and the electrolytic cell.
Background
In the related art, hydrogen generated by a cathode can permeate into an anode half-cell under the influence of a gasket and a diaphragm in the running process of an alkaline water hydrogen production electrolytic tank. On one hand, hydrogen in the anode half-cell can generate Hydrogen Oxidation Reaction (HOR), so that the catalytic activity of an anode electrode is occupied, and the current efficiency of the electrolytic cell is reduced; on the other hand, when the hydrogen content in the anode cell increases, oxyhydrogen combustion may occur, even at risk of explosion.
In the prior art, the manufacturers of electrolytic tanks mainly adopt a method for monitoring the voltage of a cell to indirectly verify whether hydrogen leakage occurs in the cell. However, since the cell voltage is affected by the cell flow, the cell temperature, the cell consistency and the like, whether hydrogen leakage occurs cannot be directly verified by the data of the cell voltage, so that the method cannot accurately reflect the hydrogen leakage condition of the electrolytic cell.
Disclosure of Invention
The invention provides a hydrogen leakage detection method and device for an electrolytic cell and the electrolytic cell, which are used for solving the defects in the prior art and realizing the following technical effects: the electrochemical impedance detection technology is introduced, so that a more direct, accurate and independent hydrogen leakage diagnosis means is provided, and the safety and the efficiency of the electrolytic tank are improved.
The hydrogen leakage detection method of the electrolytic cell according to the embodiment of the first aspect of the invention comprises the following steps:
During the operation process of the electrolytic tank, the cell voltage of each electrolytic cell in the electrolytic tank is obtained;
according to the cell voltage meeting the voltage abnormality condition, marking the electrolysis cell corresponding to the cell voltage as an abnormal electrolysis cell;
After the electrolytic tank is stopped, carrying out electrochemical impedance detection on the abnormal electrolytic cell to obtain actual electrochemical impedance data;
And judging whether hydrogen leakage occurs in the abnormal electrolysis cell according to the actual electrochemical impedance data.
According to one embodiment of the present invention, the step of marking the electrolysis cell corresponding to the cell voltage as an abnormal electrolysis cell if the cell voltage satisfies a voltage abnormality condition specifically includes:
And according to the fact that the voltage difference of the cell voltages of the two adjacent electrolysis cells is larger than the preset voltage difference, marking the electrolysis cell corresponding to the lower cell voltage as an abnormal electrolysis cell in the two adjacent electrolysis cells.
According to one embodiment of the present invention, the step of performing electrochemical impedance detection on the abnormal electrolysis cell to obtain actual electrochemical impedance data specifically includes:
And inputting a small-amplitude sinusoidal alternating current signal into the abnormal electrolysis cell by using an electrochemical impedance detection device and simultaneously feeding back to obtain the actual electrochemical impedance data.
According to one embodiment of the present invention, in the step of performing electrochemical impedance detection on the abnormal electrolysis cell to obtain actual electrochemical impedance data, the actual electrochemical impedance data includes an actual separator impedance R m and an actual charge transfer impedance R ct.
According to one embodiment of the present invention, after the step of performing electrochemical impedance detection on the abnormal electrolysis cell after the shutdown of the electrolysis cell to obtain electrochemical impedance data, the method for detecting hydrogen leakage of the electrolysis cell further comprises:
After the electrolytic tank is stopped, carrying out electrochemical impedance detection on a normal electrolytic cell adjacent to the abnormal electrolytic cell so as to obtain standard electrochemical impedance data;
the step of judging whether the abnormal electrolysis cell leaks hydrogen or not according to the electrochemical impedance data specifically comprises the following steps:
And judging whether the abnormal electrolysis cell leaks hydrogen or not according to a comparison result between the actual electrochemical impedance data and the standard electrochemical impedance data.
According to one embodiment of the invention, the actual electrochemical impedance data includes an actual membrane impedance R m and an actual charge transfer impedance R ct, and the standard electrochemical impedance data includes a standard membrane impedance R m 'and a standard charge transfer impedance R ct';
The step of judging whether the abnormal electrolysis cell leaks hydrogen or not according to the comparison result between the electrochemical impedance data and the standard electrochemical impedance data specifically comprises the following steps:
Determining that hydrogen leakage occurs in the abnormal electrolysis cell if the difference between the actual diaphragm impedance R m and the standard diaphragm impedance R m 'is greater than a first impedance difference and the difference between the actual charge transfer impedance R ct and the standard charge transfer impedance R ct' is greater than a second impedance difference;
In the case where the difference between the actual diaphragm impedance R m and the standard diaphragm impedance R m 'is smaller than the first impedance difference, and/or the difference between the actual charge transfer impedance R ct and the standard charge transfer impedance R ct' is smaller than the second impedance difference, it is determined that no hydrogen leakage occurs in the abnormal electrolysis cell.
According to one embodiment of the present invention, after the step of judging whether the abnormal electrolysis cell is hydrogen-leaked or not based on the comparison result between the electrochemical impedance data and the standard electrochemical impedance data, the hydrogen leakage detection method of an electrolysis cell further includes:
Under the condition that the abnormal electrolysis cell leaks hydrogen, determining the hydrogen leakage degree of the abnormal electrolysis cell and sending out a corresponding hydrogen leakage alarm according to the interval range where the difference value between the electrochemical impedance data and the standard electrochemical impedance data is located.
According to one embodiment of the present invention, the step of determining whether the abnormal electrolysis cell leaks hydrogen according to the actual electrochemical impedance data specifically includes:
Under the condition that the actual electrochemical impedance data is in a preset electrochemical impedance range, determining that the abnormal electrolysis cell is not subjected to hydrogen leakage;
and under the condition that the actual electrochemical impedance data exceeds or falls below a preset electrochemical impedance range, determining that the abnormal electrolysis cell leaks hydrogen.
A hydrogen leakage detecting apparatus of an electrolytic cell according to an embodiment of the second aspect of the present invention includes:
the acquisition module is used for acquiring the cell voltage of each electrolysis cell in the electrolytic cell in the operation process of the electrolytic cell;
The first control module is used for marking the electrolytic cell corresponding to the cell voltage as an abnormal electrolytic cell according to the fact that the cell voltage meets the voltage abnormal condition;
The second control module is used for carrying out electrochemical impedance detection on the abnormal electrolysis cell after the electrolytic cell is stopped so as to obtain actual electrochemical impedance data;
And the third control module is used for judging whether the abnormal electrolysis cell leaks hydrogen or not according to the actual electrochemical impedance data.
An electrolytic cell according to an embodiment of the third aspect of the present invention comprises a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the hydrogen leakage detection method of the electrolytic cell according to the embodiment of the first aspect of the present invention when executing the program;
The electrochemical impedance detection device also comprises a cathode bipolar plate, an anode bipolar plate, a cathode electrode, an anode electrode, a diaphragm, a cathode cell formed by the cathode and the cathode bipolar plate, an anode cell formed by the anode and the anode bipolar plate and an electrochemical impedance detection device.
The invention provides a hydrogen leakage detection method of an electrolytic tank, and the hydrogen leakage detection method of the invention has the following advantages compared with the prior art:
(1) Direct internal leakage diagnosis: in the prior art, hydrogen leakage is usually verified indirectly by monitoring the cell voltage, and the method is influenced by various factors such as the cell flow, the temperature and the like, so that whether hydrogen leakage occurs cannot be directly determined. The method of the invention directly diagnoses the cell of the electrolytic cell through electrochemical impedance detection, and can more accurately judge whether hydrogen leakage occurs in the cell. (2) is not affected by external conditions: the cell voltage monitoring method in the prior art is affected by factors such as cell flow rate, cell temperature and the like, and the factors may lead to misjudgment. The electrochemical impedance detection is carried out when the electrolytic tank is stopped, and the electrochemical impedance detection is not influenced by external conditions such as the flow rate and the temperature of the cell, and the data result is more accurate and reliable. (3) innovative electrochemical impedance detection method: the invention adopts an electrochemical impedance detection method, which is a new technical means, and the position and the degree of hydrogen leakage can be more accurately identified by analyzing the diaphragm impedance R m and the charge transfer impedance R ct. (4) improving security: by accurately diagnosing hydrogen leakage, measures can be taken in time for repair, so that the risk of oxyhydrogen combustion and even explosion is reduced, and the operation safety of the electrolytic tank is improved. (5) improving efficiency: the accurate diagnosis of hydrogen leakage is beneficial to maintaining the normal operation of the electrolytic tank, and the reduction of current efficiency caused by hydrogen leakage is avoided, so that the overall working efficiency of the electrolytic tank is improved.
In addition, the invention also provides a complete detection flow strategy, comprising voltage monitoring in the running process and electrochemical impedance detection after shutdown, which is helpful for systematically managing and maintaining the electrolytic tank.
In summary, the method of the invention provides a more direct, accurate and independent hydrogen leakage diagnosis means by introducing an electrochemical impedance detection technology, which is helpful for improving the safety and efficiency of the electrolytic cell.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a hydrogen leakage method of an electrolytic cell provided by the invention;
FIG. 2 is a second schematic flow chart of the hydrogen leakage method of the electrolytic cell provided by the invention;
FIG. 3 is a schematic view of a hydrogen leakage device of an electrolytic cell according to the present invention;
FIG. 4 is a schematic view of the structure of the electrolytic cell provided by the invention;
FIG. 5 is an equivalent circuit diagram of the electrolytic cell provided by the invention;
Fig. 6 is a schematic structural diagram of an electronic device provided by the present invention.
Reference numerals:
1. A cathode bipolar plate; 2. an anode bipolar plate; 3. a cathode electrode; 4. an anode electrode; 5. a diaphragm; 6. a cathode sub-chamber; 7. yang Jixiao chambers; 8. electrochemical impedance detection device.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The hydrogen leakage detection method of the electrolytic cell, the hydrogen leakage detection device and the electrolytic cell proposed by the present invention are described below with reference to the accompanying drawings. Before the embodiments of the present invention are described in detail, the entire application scenario is described. The hydrogen leakage detection method, the hydrogen leakage detection device, the electronic equipment and the computer readable storage medium of the electrolytic cell can be applied to the local of the electrolytic cell, cloud platforms in the field of the Internet, cloud platforms in the field of other kinds of Internet or third party equipment. The third party device may include a mobile phone, a tablet computer, a notebook computer, a vehicle-mounted computer, and other intelligent terminals.
In the following, a hydrogen leakage detection method suitable for an electrolytic tank is described as an example, and it should be understood that the detection method according to the embodiment of the present invention may also be suitable for a cloud platform and a third party device. Before introducing the hydrogen leakage detection method of the electrolytic cell, it should also be noted that the hydrogen leakage detection method of the present invention can detect whether the electrolytic cell has hydrogen leakage, where the electrolytic cell includes but is not limited to an alkaline hydrogen production electrolytic cell, and the alkaline hydrogen production electrolytic cell is composed of a plurality of electrolysis cells, and a single electrolysis cell includes: the cathode bipolar plate 1, the anode bipolar plate 2, the cathode electrode 3, the anode electrode 4, the diaphragm 5, a cathode cell 6 formed by the cathode and the cathode bipolar plate 1, an anode cell 7 formed by the anode and the anode bipolar plate 2 and an electrochemical impedance detection device 8.
As shown in fig. 1, a hydrogen leakage detecting method of an electrolytic cell according to an embodiment of the first aspect of the present invention includes:
step S1, acquiring cell voltage of each electrolysis cell in the operation process of the electrolysis cell;
Step S2, according to the condition that the cell voltage meets the voltage abnormality, marking the electrolysis cell corresponding to the cell voltage as an abnormal electrolysis cell;
S3, after the electrolytic tank is stopped, carrying out electrochemical impedance detection on the abnormal electrolytic cell to obtain actual electrochemical impedance data;
And S4, judging whether hydrogen leakage occurs in the abnormal electrolysis cell according to the actual electrochemical impedance data.
The hydrogen leakage detection method of the electrolytic tank according to the embodiment of the invention has the following specific working principle: the method utilizes electrochemical impedance measurement technology to diagnose hydrogen leakage of the inner cell of the electrolytic cell. In the operation process of the electrolytic tank, the voltage of each electrolytic cell is monitored to indirectly judge whether hydrogen leakage exists. And after the electrolytic tank is stopped, electrochemical impedance detection is carried out on the electrolytic cell marked as abnormal so as to obtain more direct leakage evidence, and further, whether hydrogen leakage exists in the electrolytic cell marked as abnormal can be judged by analyzing electrochemical impedance data.
Further, the hydrogen leakage detection method of the electrolytic cell according to the embodiment of the invention comprises the following specific working procedures: first, during operation of the electrolyzer, the voltage of each electrolysis cell needs to be monitored and recorded, wherein the voltage data obtained by the monitoring can be used to evaluate the operation state of each electrolysis cell. Then, after the voltage data of each electrolysis cell is obtained, the voltage data of each electrolysis cell is further analyzed and judged, if the voltage of one electrolysis cell meets the preset voltage abnormality condition, the voltage abnormality of the electrolysis cell is indicated, and the risk of hydrogen leakage possibly exists, so that the electrolysis cell with abnormal voltage data needs to be marked as an abnormal electrolysis cell, wherein the voltage abnormality condition comprises but is not limited to abnormal change of the voltage in the electrolysis cell or deviation from the normal working voltage.
Further, electrochemical impedance detection is performed on the electrolysis cells previously marked as abnormal after the cell is shut down. Specifically, in the electrochemical impedance detection process, a sinusoidal ac signal needs to be applied to the electrolytic cell, and then the electrochemical impedance of the response is measured, so as to obtain the actual electrochemical impedance data corresponding to the abnormal electrolytic cell. The electrochemical impedance data may include data such as a separator impedance (R m) and a charge transfer impedance (R ct), which is not particularly limited herein.
Finally, after the actual electrochemical impedance data are obtained, carrying out detailed analysis and comparison on the actual electrochemical impedance data, and if the numerical value of the actual electrochemical impedance data is abnormal, indicating that hydrogen leakage occurs in the abnormal electrolysis cell; if the value of the actual electrochemical impedance data is not abnormal, the abnormal electrolysis cell is indicated that no hydrogen leakage occurs.
For example, the actual electrochemical impedance data may include an actual membrane impedance (R m) and an actual charge transfer impedance (R ct), which if the actual membrane impedance R m is abnormal, indicates that the membrane 5 within the abnormal electrolysis cell may be broken, resulting in permeation of hydrogen gas from the cathode cell 6 to the anode cell 7. Further, if the actual charge transfer resistance Rct is abnormal, this indicates that there is a possibility that hydrogen gas is electrochemically reacted in the anode sub-chamber 7 of the abnormal electrolysis cell, that is, a sign of hydrogen leakage occurs. Therefore, by comparing the actually measured values of R m and R ct with the preset normal values, it is possible to determine whether or not the abnormal electrolysis cell does indeed leak hydrogen.
In conclusion, the invention provides a direct and accurate means for diagnosing hydrogen leakage, and it can be understood that the hydrogen leakage detection method of the electrolytic cell provided by the invention is not influenced by external factors such as cell flow, temperature and the like, so that the detection accuracy is improved.
In the related art, hydrogen generated by a cathode can permeate into an anode half-cell under the influence of a gasket and a diaphragm 5 in the operation process of the alkaline water hydrogen production electrolytic tank. On the one hand, hydrogen in the anode half-cell can generate Hydrogen Oxidation Reaction (HOR), so that the catalytic activity of the anode electrode 4 is occupied, and the current efficiency of the electrolytic cell is reduced; on the other hand, when the hydrogen content in the anode small chamber 7 increases, oxyhydrogen combustion may occur, even at risk of explosion.
In the prior art, the manufacturers of electrolytic tanks mainly adopt a method for monitoring the voltage of a cell to indirectly verify whether hydrogen leakage occurs in the cell. However, since the cell voltage is affected by the cell flow, the cell temperature, the cell consistency and the like, whether hydrogen leakage occurs cannot be directly verified by the data of the cell voltage, so that the method cannot accurately reflect the hydrogen leakage condition of the electrolytic cell.
Therefore, in order to solve the technical defects existing in the related art, the invention provides a hydrogen leakage detection method of an electrolytic cell, and compared with the prior art, the hydrogen leakage detection method of the invention mainly has the following advantages:
(1) Direct internal leakage diagnosis: in the prior art, hydrogen leakage is usually verified indirectly by monitoring the cell voltage, and the method is influenced by various factors such as the cell flow, the temperature and the like, so that whether hydrogen leakage occurs cannot be directly determined. The method of the invention directly diagnoses the cell of the electrolytic cell through electrochemical impedance detection, and can more accurately judge whether hydrogen leakage occurs in the cell. (2) is not affected by external conditions: the cell voltage monitoring method in the prior art is affected by factors such as cell flow rate, cell temperature and the like, and the factors may lead to misjudgment. The electrochemical impedance detection is carried out when the electrolytic tank is stopped, and the electrochemical impedance detection is not influenced by external conditions such as the flow rate and the temperature of the cell, and the data result is more accurate and reliable. (3) innovative electrochemical impedance detection method: the invention adopts an electrochemical impedance detection method, which is a new technical means, and the position and the degree of hydrogen leakage can be more accurately identified by analyzing the diaphragm impedance R m and the charge transfer impedance R ct. (4) improving security: by accurately diagnosing hydrogen leakage, measures can be taken in time for repair, so that the risk of oxyhydrogen combustion and even explosion is reduced, and the operation safety of the electrolytic tank is improved. (5) improving efficiency: the accurate diagnosis of hydrogen leakage is beneficial to maintaining the normal operation of the electrolytic tank, and the reduction of current efficiency caused by hydrogen leakage is avoided, so that the overall working efficiency of the electrolytic tank is improved.
In addition, the invention also provides a complete detection flow strategy, comprising voltage monitoring in the running process and electrochemical impedance detection after shutdown, which is helpful for systematically managing and maintaining the electrolytic tank.
In summary, the method of the invention provides a more direct, accurate and independent hydrogen leakage diagnosis means by introducing an electrochemical impedance detection technology, which is helpful for improving the safety and efficiency of the electrolytic cell.
According to some embodiments of the present invention, when the cell voltage satisfies the voltage abnormality condition, the step of marking the electrolysis cell corresponding to the cell voltage as an abnormal electrolysis cell specifically includes:
And according to the fact that the voltage difference of the cell voltages of the two adjacent electrolysis cells is larger than the preset voltage difference, marking the electrolysis cell corresponding to the lower cell voltage as an abnormal electrolysis cell in the two adjacent electrolysis cells.
In this embodiment, the system continuously monitors the voltage of each electrolysis cell during operation of the cell, wherein for each pair of adjacent cells the system calculates their cell voltage difference, i.e. the difference between the voltages of the two adjacent cells.
The system sets a preset voltage difference which is determined according to the normal operating parameters of the electrolytic cell and the empirical data. When the voltage difference between two adjacent cells is detected to be larger than the preset voltage difference, the system marks the cell with lower voltage as an abnormal electrolysis cell, namely if the voltage difference between the two adjacent cells exceeds the preset value, the abnormal conditions such as hydrogen leakage and the like can exist in the cell with lower voltage, and the purpose of the marking operation is to carry out subsequent further detection and possible maintenance work.
Further, the electrolytic cells marked as abnormal are recorded in the system for electrochemical impedance detection after the cell is shut down. The above-described marking and recording operations may help to quickly locate potentially problematic electrolysis cells, thereby improving the efficiency of maintenance and overhaul.
According to some embodiments of the present invention, the step of performing electrochemical impedance detection on the abnormal electrolysis cell to obtain actual electrochemical impedance data specifically includes:
the electrochemical impedance detection device 8 is utilized to connect the cathode bipolar plate 1 and the anode bipolar plate 2 in the abnormal electrolysis cell, a small-amplitude sine alternating current signal is input into the abnormal electrolysis cell, and meanwhile, the actual electrochemical impedance data is obtained through feedback.
Specifically, in the embodiment of the invention, the specific steps of electrochemical impedance detection of the abnormal electrolysis cell are as follows: first, preparing detection: after the cell is shut down, electrochemical impedance measurements are prepared, at which time the cell is controlled shut down in advance so that it no longer undergoes electrolytic reactions and is at rest. Secondly, connecting a detection device: the detection electrodes are connected to the cathode bipolar plate 1 and the anode bipolar plate 2 in the abnormal electrolysis cell using electrochemical impedance detection means 8, so that the detection means can establish an electrical connection with the electrode system inside the cell. Third, inputting alternating current signals: for the electrolysis cells marked as abnormal, a sinusoidal ac signal of small amplitude is input by the detection means, it being noted that the amplitude of the sinusoidal ac signal is small, so as to avoid unnecessary damage to the electrolysis cell. Fourth, impedance data are measured: when an alternating current signal is input into the cell, the detection device will measure and record electrochemical impedance data of the cell.
Further, in the step of performing electrochemical impedance detection on the abnormal electrolysis cell to obtain actual electrochemical impedance data, the actual electrochemical impedance data includes an actual separator impedance R m and an actual charge transfer impedance R ct.
It will be appreciated that the membrane impedance R m reflects the integrity and barrier capability of the membrane 5, while the charge transfer impedance R ct is related to the electrochemical reactions occurring at the anode. Normally, R m should remain within a stable range, while R ct should reflect the normal electrochemical reaction at the anode. If the value of R m is abnormally high, indicating that the membrane 5 may be broken, allowing hydrogen to permeate from the cathode cell 6 to the anode cell 7; if the value of R ct is abnormal, this means that there may be abnormal electrochemical reactions in the anode cell 7, and the abnormal electrochemical reactions are generally caused by leakage of hydrogen.
According to some embodiments of the present invention, after the step of performing electrochemical impedance detection on the abnormal electrolysis cell to obtain electrochemical impedance data after the shutdown of the electrolysis cell, the hydrogen leakage detection method of the electrolysis cell further includes:
and after the electrolytic tank is stopped, carrying out electrochemical impedance detection on a normal electrolytic cell adjacent to the abnormal electrolytic cell so as to obtain standard electrochemical impedance data.
Judging whether hydrogen leakage occurs in the abnormal electrolysis cell according to the electrochemical impedance data, wherein the method specifically comprises the following steps:
and judging whether hydrogen leakage occurs in the abnormal electrolysis cell according to a comparison result between the actual electrochemical impedance data and the standard electrochemical impedance data.
In this embodiment, the method for detecting hydrogen leakage of an electrolytic cell further includes performing the same detection on adjacent normal electrolytic cells after performing electrochemical impedance detection on the abnormal electrolytic cells and acquiring actual electrochemical impedance data, so as to acquire standard electrochemical impedance data. The purpose of this step is to establish a reference standard for comparison with the data of the abnormal electrolysis cell, thereby more accurately judging the hydrogen leakage condition.
Thus, by the above steps, hydrogen leakage can be more accurately identified because it not only depends on the data of the individual cells, but also improves the reliability of judgment by comparison with the normal cells, thus contributing to improvement of maintenance efficiency and operation safety of the electrolytic cell.
For example, after the cell is shut down, normal electrolysis cells adjacent to the abnormal electrolysis cells are selected for electrochemical impedance detection. The electrochemical impedance data of the normal electrolysis cell is within the normal operating range and thus can be used as standard data. Subsequently, the actual electrochemical impedance data of the abnormal electrolysis cell (including the actual separator impedance R m and the actual charge transfer impedance R ct) is compared with the standard electrochemical impedance data obtained from the normal electrolysis cell.
The difference between the actual electrochemical impedance data and the standard electrochemical impedance data is analyzed. If the value of R m for the abnormal electrolysis cell is significantly higher than the standard value, this may indicate that there is a breakage of the membrane 5, allowing hydrogen permeation from the cathode cell 6 to the anode cell 7. Also, if the R ct value is abnormal, it may mean that there is an abnormal electrochemical reaction in the anode cell 7, which is usually an indication of hydrogen leakage.
Finally, according to the result of the comparative analysis, whether hydrogen leakage occurs in the abnormal electrolysis cell can be judged. Wherein if the actual electrochemical impedance data and the standard data have significant differences, and the differences are consistent with typical characteristics of hydrogen leakage, a conclusion can be drawn that hydrogen leakage occurs in an abnormal electrolysis cell.
In some embodiments of the present invention, the actual electrochemical impedance data includes an actual membrane impedance R m and an actual charge transfer impedance R ct, the standard electrochemical impedance data includes a standard membrane impedance R m 'and a standard charge transfer impedance R ct', and the step of determining whether the abnormal electrolysis cell is hydrogen leaking according to a comparison result between the electrochemical impedance data and the standard electrochemical impedance data specifically includes:
Determining that the abnormal electrolysis cell is subject to hydrogen leakage when the difference between the actual membrane impedance R m and the standard membrane impedance R m 'is greater than the first impedance difference and the difference between the actual charge transfer impedance R ct and the standard charge transfer impedance R ct' is greater than the second impedance difference;
In the case where the difference between the actual diaphragm impedance R m and the standard diaphragm impedance R m 'is smaller than the first impedance difference, and/or the difference between the actual charge transfer impedance R ct and the standard charge transfer impedance R ct' is smaller than the second impedance difference, it is determined that no hydrogen leakage occurs in the abnormal electrolysis cell.
It will be appreciated that when the difference between the actual membrane impedance R m and the standard membrane impedance R m 'is greater than the first impedance difference, this indicates that a leak has occurred in the membrane 5, and further, when the difference between the actual charge transfer impedance R ct and the standard charge transfer impedance R ct' is greater than the second impedance difference, this indicates that an electrochemical reaction has occurred in the anode, and thus, when the above two conditions are satisfied at the same time, this indicates that a hydrogen leak has occurred in the abnormal electrolysis cell, and vice versa, this indicates that no hydrogen leak has occurred in the abnormal electrolysis cell.
According to some embodiments of the present invention, after the step of judging whether the abnormal electrolysis cell is hydrogen-leaked or not according to the comparison result between the electrochemical impedance data and the standard electrochemical impedance data, the hydrogen leakage detection method of the electrolysis cell further comprises:
Under the condition that the abnormal electrolysis cell leaks hydrogen, determining the hydrogen leakage degree of the abnormal electrolysis cell and sending out a corresponding hydrogen leakage alarm according to the interval range where the difference value between the electrochemical impedance data and the standard electrochemical impedance data is located.
In one embodiment, the difference between the actual electrochemical impedance data (R m and R ct) of an abnormal electrolysis cell and the standard electrochemical impedance data of an adjacent normal electrolysis cell is calculated by comparing the two, wherein the difference may reflect the severity of the leak. For example, if the difference between R m and R m 'is large and/or the difference between R ct and R ct' is large, this means that the breakage of the separator 5 is serious and the electrochemical reaction caused by the hydrogen leakage in the anode sub-chamber 7 is abnormal, and thus, the degree of hydrogen leakage is high at this time.
Further, the system presets different leakage degree intervals, each interval corresponding to a different leakage severity, e.g., the system may set levels of slight, medium, and severe leakage for different impedance difference ranges. And then, the system determines the hydrogen leakage degree of the abnormal electrolysis cell according to the interval where the calculated difference value is located, and sends out a hydrogen leakage alarm corresponding to the hydrogen leakage degree. The hydrogen leakage alarm can be visual (such as flashing indicator lights), audible (such as alarm sounds) or an electronic signal sent by a control system.
After the system sends out the hydrogen leakage alarm, the detailed information of the leakage alarm can be further recorded, including the leakage degree, the occurrence time, the affected electrolysis cell and the like. Further, the system starts corresponding emergency response procedures, such as closing the electrolytic cell, starting the leakage detection and repair process, and the like, according to the leakage degree, so as to prevent further hydrogen leakage and potential safety risks.
In summary, through the steps, not only can the hydrogen leakage be found in time, but also the severity of the leakage can be estimated, and appropriate measures can be rapidly taken, so that the potential influence of the hydrogen leakage on equipment and personnel safety is reduced to the greatest extent. The detection step improves the safety and reliability of the electrolytic cell, and optimizes the maintenance flow.
According to other embodiments of the present invention, the step of determining whether the abnormal electrolysis cell is leaking hydrogen according to the actual electrochemical impedance data specifically includes:
under the condition that the actual electrochemical impedance data is in a preset electrochemical impedance range, determining that hydrogen leakage does not occur in the abnormal electrolysis cell;
And under the condition that the actual electrochemical impedance data exceeds or falls below a preset electrochemical impedance range, determining that the abnormal electrolysis cell leaks hydrogen.
In this embodiment, a predetermined electrochemical impedance range is set based on the normal operating parameters and historical data of the electrolyzer before the start of the test, unlike the above-described embodiment, which compares with the standard electrochemical impedance data. This range represents the electrochemical impedance value of a normal electrolysis cell without hydrogen leakage.
It can be understood that in this embodiment, the actual electrochemical impedance data is compared with the preset electrochemical impedance range, and the hydrogen leakage condition of the electrolytic cell can be determined according to the comparison result. For example, if the actual values of R m and R ct are both within the preset electrochemical impedance range, then it can be assumed that no hydrogen leakage occurs from the abnormal electrolysis cell; if the actual electrochemical impedance data exceeds the preset electrochemical impedance range or falls below the lower limit of the preset electrochemical impedance range, it can be determined that hydrogen leakage occurs in the abnormal electrolysis cell, and the above data change exceeding or falling below the normal range may be caused by breakage of the separator 5 or abnormal electrochemical reaction in the anode cell 7.
A specific embodiment of the hydrogen leakage detection method of the electrolytic cell of the present invention is described below with reference to the accompanying drawings.
As shown in fig. 4, the electrolytic cell is constituted by a plurality of electrolytic cells, a single electrolytic cell comprising: the cathode bipolar plate 1, the anode bipolar plate 2, the cathode electrode 3, the anode electrode 4, the diaphragm 5, a cathode cell 6 formed by the cathode and the cathode bipolar plate 1, an anode cell 7 formed by the anode and the anode bipolar plate 2 and an electrochemical impedance detection device 8.
The invention utilizes an electrochemical impedance detection device 8, a cathode bipolar plate 1 and an anode bipolar plate 2 which are connected in the same electrolysis cell, inputs a small-amplitude sine alternating current signal into the electrolysis cell, and simultaneously feeds back to obtain electrochemical impedance data. By utilizing equivalent circuit analysis, the diaphragm impedance R m and the charge transfer impedance R ct can be obtained from electrochemical impedance data, wherein R m is influenced by the diaphragm 5, whether the diaphragm 5 is broken and leaked or not can be verified, R ct is influenced by electrochemical reaction occurring at the anode, and whether hydrogen is subjected to electrochemical reaction at the anode or not can be verified.
The main control logic of the hydrogen leakage detection method of the invention is as follows: and when the voltage difference of the adjacent cells is found to be larger than a preset value, marking the electrolytic cell with lower voltage. When the electrolytic tank is stopped, electrochemical impedance detection is carried out on the marked abnormal electrolytic cells and the electrolytic cells adjacent to the abnormal electrolytic cells in front of and behind the abnormal electrolytic cells to obtain R m and R ct values of the various electrolytic cells, the delta R m and delta R ct are compared, whether the abnormal electrolytic cells exceed a preset value or not is judged, and if the abnormal electrolytic cells exceed the preset value, the hydrogen leakage in the cells is judged.
Specifically, as shown in fig. 2, fig. 2 is a specific embodiment of a hydrogen leakage method, where U i±1 and U i refer to respective voltage levels of two adjacent electrolysis cells, and "EIS measurement on the i-1, i, i+1 cell ports after the shutdown of the electrolysis cell" in the flowchart refers to: after the electrolytic cell is stopped, electrochemical impedance detection is performed on an abnormal electrolytic cell (i-th cell) and two left and right electrolytic cells (i-1 th and i+1 th cells) adjacent to the abnormal electrolytic cell, respectively, wherein EIS measurement refers to electrochemical impedance detection. Further, Δr i in the flowchart refers to the impedance difference between electrochemical impedance data of an abnormal electrolysis cell and an adjacent electrolysis cell.
As shown in fig. 3, the hydrogen leakage detecting apparatus of an electrolytic cell provided by the present invention will be described below, and the hydrogen leakage detecting apparatus of an electrolytic cell described below and the hydrogen leakage detecting method of an electrolytic cell described above may be referred to correspondingly to each other.
As shown in fig. 3, the hydrogen leakage detecting apparatus of an electrolytic cell according to an embodiment of the second aspect of the present invention includes:
An acquisition module 110 for acquiring cell voltages of respective electrolysis cells in the electrolysis cell during operation of the electrolysis cell;
the first control module 120 is configured to mark an electrolysis cell corresponding to the cell voltage as an abnormal electrolysis cell if the cell voltage satisfies a voltage abnormality condition;
The second control module 130 is used for carrying out electrochemical impedance detection on the abnormal electrolysis cell after the electrolytic cell is stopped so as to obtain actual electrochemical impedance data;
And the third control module 140 is used for judging whether the abnormal electrolysis cell leaks hydrogen or not according to the actual electrochemical impedance data.
An electrolytic cell according to an embodiment of the third aspect of the present invention comprises a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the hydrogen leakage detection method of an electrolytic cell as described in the embodiment of the first aspect of the present invention when executing the program.
As shown in fig. 4, the electrolytic cell further comprises a cathode bipolar plate 1, an anode bipolar plate 2, a cathode electrode 3, an anode electrode 4, a diaphragm 5, a cathode cell 6 formed by the cathode and the cathode bipolar plate 1, an anode cell 7 formed by the anode and the anode bipolar plate 2, and an electrochemical impedance detection device 8.
Further, as shown in fig. 5, fig. 5 is an equivalent circuit diagram of fig. 4 (i.e., an electrolytic cell), wherein R HRE refers to the resistance of the cathode when hydrogen absorption occurs, R m refers to the resistance of the separator 5, R S refers to the resistance of the electrolyte, R ct refers to the resistance represented by charge transfer, R p and C p refer to the variables related to the adsorption of the oxygen generating reaction intermediate, and C dl refers to the double layer capacitance. Wherein, R m is influenced by the diaphragm 5, whether the diaphragm 5 is broken and leaked or not can be verified, and R ct is influenced by electrochemical reaction of the anode, and whether hydrogen is subjected to electrochemical reaction of the anode or not can be verified.
Fig. 6 illustrates a physical schematic diagram of an electronic device, as shown in fig. 6, which may include: processor 810, communication interface (Communications Interface) 820, memory 830, and communication bus 840, wherein processor 810, communication interface 820, memory 830 accomplish communication with each other through communication bus 840. The processor 810 may call logic instructions in the memory 830 to perform a hydrogen leak detection method of an electrolyzer, comprising: during the operation process of the electrolytic tank, the cell voltage of each electrolytic cell in the electrolytic tank is obtained; according to the cell voltage meeting the voltage abnormality condition, marking the electrolysis cell corresponding to the cell voltage as an abnormal electrolysis cell; after the electrolytic tank is stopped, carrying out electrochemical impedance detection on the abnormal electrolytic cell to obtain actual electrochemical impedance data; and judging whether hydrogen leakage occurs in the abnormal electrolysis cell according to the actual electrochemical impedance data.
Further, the logic instructions in the memory 830 described above may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method of the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product, where the computer program product includes a computer program, where the computer program can be stored on a non-transitory computer readable storage medium, and when the computer program is executed by a processor, the computer can execute the method for detecting hydrogen leakage of an electrolytic cell provided by the above methods, where the method includes: during the operation process of the electrolytic tank, the cell voltage of each electrolytic cell in the electrolytic tank is obtained; according to the cell voltage meeting the voltage abnormality condition, marking the electrolysis cell corresponding to the cell voltage as an abnormal electrolysis cell; after the electrolytic tank is stopped, carrying out electrochemical impedance detection on the abnormal electrolytic cell to obtain actual electrochemical impedance data; and judging whether hydrogen leakage occurs in the abnormal electrolysis cell according to the actual electrochemical impedance data.
In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the method for detecting hydrogen leakage of an electrolytic cell provided by the above methods, comprising: during the operation process of the electrolytic tank, the cell voltage of each electrolytic cell in the electrolytic tank is obtained; according to the cell voltage meeting the voltage abnormality condition, marking the electrolysis cell corresponding to the cell voltage as an abnormal electrolysis cell; after the electrolytic tank is stopped, carrying out electrochemical impedance detection on the abnormal electrolytic cell to obtain actual electrochemical impedance data; and judging whether hydrogen leakage occurs in the abnormal electrolysis cell according to the actual electrochemical impedance data.
The apparatus embodiments described above are merely illustrative, wherein elements illustrated as separate elements may or may not be physically separate, and elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on such understanding, the foregoing technical solutions may be embodied essentially or in part in the form of a software product, which may be stored in a computer-readable storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the various embodiments or methods of some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A hydrogen leakage detection method of an electrolytic cell, characterized by comprising:
During the operation process of the electrolytic tank, the cell voltage of each electrolytic cell in the electrolytic tank is obtained;
according to the cell voltage meeting the voltage abnormality condition, marking the electrolysis cell corresponding to the cell voltage as an abnormal electrolysis cell;
After the electrolytic tank is stopped, carrying out electrochemical impedance detection on the abnormal electrolytic cell to obtain actual electrochemical impedance data;
And judging whether hydrogen leakage occurs in the abnormal electrolysis cell according to the actual electrochemical impedance data.
2. The method for detecting hydrogen leakage in an electrolytic cell according to claim 1, wherein the step of marking the electrolytic cell corresponding to the cell voltage as an abnormal electrolytic cell if the cell voltage satisfies a voltage abnormality condition, specifically comprises:
And according to the fact that the voltage difference of the cell voltages of the two adjacent electrolysis cells is larger than the preset voltage difference, marking the electrolysis cell corresponding to the lower cell voltage as an abnormal electrolysis cell in the two adjacent electrolysis cells.
3. The method for detecting hydrogen leakage in an electrolytic cell according to claim 2, wherein the step of performing electrochemical impedance detection on the abnormal electrolysis cell to obtain actual electrochemical impedance data comprises:
And inputting a small-amplitude sinusoidal alternating current signal into the abnormal electrolysis cell by using an electrochemical impedance detection device and simultaneously feeding back to obtain the actual electrochemical impedance data.
4. A hydrogen leakage detection method for an electrolytic cell according to claim 3, wherein in the step of performing electrochemical impedance detection on the abnormal electrolysis cell to obtain actual electrochemical impedance data, the actual electrochemical impedance data includes an actual diaphragm impedance R m and an actual charge transfer impedance R ct.
5. The method for detecting hydrogen leakage in an electrolytic cell according to any one of claims 1 to 4, wherein after the step of performing electrochemical impedance detection on the abnormal electrolysis cell after the shutdown of the electrolytic cell to obtain electrochemical impedance data, further comprising:
After the electrolytic tank is stopped, carrying out electrochemical impedance detection on a normal electrolytic cell adjacent to the abnormal electrolytic cell so as to obtain standard electrochemical impedance data;
the step of judging whether the abnormal electrolysis cell leaks hydrogen or not according to the electrochemical impedance data specifically comprises the following steps:
And judging whether the abnormal electrolysis cell leaks hydrogen or not according to a comparison result between the actual electrochemical impedance data and the standard electrochemical impedance data.
6. The method of hydrogen leakage detection for an electrolytic cell according to claim 5, wherein the actual electrochemical impedance data comprises an actual diaphragm impedance R m and an actual charge transfer impedance R ct, and the standard electrochemical impedance data comprises a standard diaphragm impedance R m 'and a standard charge transfer impedance R ct';
The step of judging whether the abnormal electrolysis cell leaks hydrogen or not according to the comparison result between the electrochemical impedance data and the standard electrochemical impedance data specifically comprises the following steps:
Determining that hydrogen leakage occurs in the abnormal electrolysis cell if the difference between the actual diaphragm impedance R m and the standard diaphragm impedance R m 'is greater than a first impedance difference and the difference between the actual charge transfer impedance R ct and the standard charge transfer impedance R ct' is greater than a second impedance difference;
In the case where the difference between the actual diaphragm impedance R m and the standard diaphragm impedance R m 'is smaller than the first impedance difference, and/or the difference between the actual charge transfer impedance R ct and the standard charge transfer impedance R ct' is smaller than the second impedance difference, it is determined that no hydrogen leakage occurs in the abnormal electrolysis cell.
7. The method for detecting hydrogen leakage in an electrolytic cell according to claim 5, further comprising, after the step of judging whether or not hydrogen leakage has occurred in the abnormal electrolysis cell based on a comparison result between the electrochemical impedance data and the standard electrochemical impedance data:
Under the condition that the abnormal electrolysis cell leaks hydrogen, determining the hydrogen leakage degree of the abnormal electrolysis cell and sending out a corresponding hydrogen leakage alarm according to the interval range where the difference value between the electrochemical impedance data and the standard electrochemical impedance data is located.
8. The hydrogen leakage detection method of an electrolytic cell according to any one of claims 1 to 4, wherein the step of judging whether or not the abnormal electrolysis cell has hydrogen leakage based on the actual electrochemical impedance data specifically comprises:
Under the condition that the actual electrochemical impedance data is in a preset electrochemical impedance range, determining that the abnormal electrolysis cell is not subjected to hydrogen leakage;
and under the condition that the actual electrochemical impedance data exceeds or falls below a preset electrochemical impedance range, determining that the abnormal electrolysis cell leaks hydrogen.
9. A hydrogen leakage detecting device of an electrolytic cell, comprising:
the acquisition module is used for acquiring the cell voltage of each electrolysis cell in the electrolytic cell in the operation process of the electrolytic cell;
The first control module is used for marking the electrolytic cell corresponding to the cell voltage as an abnormal electrolytic cell according to the fact that the cell voltage meets the voltage abnormal condition;
The second control module is used for carrying out electrochemical impedance detection on the abnormal electrolysis cell after the electrolytic cell is stopped so as to obtain actual electrochemical impedance data;
And the third control module is used for judging whether the abnormal electrolysis cell leaks hydrogen or not according to the actual electrochemical impedance data.
10. An electrolyzer comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method of hydrogen leak detection of an electrolyzer according to any one of claims 1 to 8 when the program is executed;
The electrochemical impedance detection device also comprises a cathode bipolar plate, an anode bipolar plate, a cathode electrode, an anode electrode, a diaphragm, a cathode cell formed by the cathode and the cathode bipolar plate, an anode cell formed by the anode and the anode bipolar plate and an electrochemical impedance detection device.
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