Electrolytic Cell Health Status Assessment Method and System

Abstract

This invention proposes a method and system for assessing the health status of an electrolyzer, relating to the field of electrolyzer technology. The method includes: repeatedly collecting data on a single drainage stream after the steam-water mixture generated at the electrolyzer cathode has been processed by a steam-water separator, according to a set sampling frequency; detecting the water quantity and quality of the single drainage stream; accumulating the number of abnormal occurrences of each type of degradation parameter in the multiple drainage streams to obtain the cumulative abnormality count for each type of degradation parameter; establishing an electrolyzer health status assessment model; obtaining an electrolyzer health index based on the cumulative abnormality count for each type of degradation parameter; and assessing the health status of the electrolyzer based on the electrolyzer health index. This invention achieves water quantity detection and water quality ion detection through time-sharing automatic switching of the first and second solenoid valves, and accurately assesses the electrolyzer health index based on the cumulative detection results, reducing unplanned downtime and ensuring the safe and stable operation of the system.

Description

Technical Field

[0001] This invention belongs to the field of electrolytic cell technology, and particularly relates to a method and system for assessing the health status of electrolytic cells. Background Technology

[0002] Electrolytic cells are core production equipment in the electrolysis industry. During long-term operation, problems such as membrane aging and electrode corrosion can lead to decreased electrolysis efficiency or even failure. Electrolytic cells in a sub-healthy state are highly likely to trigger malfunctions, posing a serious challenge to overall production efficiency and enterprise profitability. Therefore, it is necessary to assess the health of electrolytic cells.

[0003] Traditionally, the assessment of the health status of electrolyzers has relied mainly on the subjective experience and intuitive judgment of technicians. This method is not only highly subjective, but also often only touches on the surface of the problem, making it difficult to fully and accurately reveal the actual operating status of the electrolyzer.

[0004] Furthermore, existing technologies for assessing the health status of electrolyzers often rely on a single parameter (such as voltage fluctuations or cumulative operating time), which cannot accurately distinguish between fault types (such as abnormal membrane permeation and metal corrosion). Moreover, traditional liquid level control methods lack correlation analysis between the frequency of cathode drainage from the electrolyzer and changes in water quality, making it difficult to provide early warnings. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, the present invention provides a method and system for assessing the health status of an electrolyzer. By automatically switching the first solenoid valve and the second solenoid valve in a time-sharing manner, water quantity detection and water quality detection are achieved. Based on the accumulation of detection results, the health index of the electrolyzer is accurately assessed, reducing unplanned downtime and ensuring the safe and stable operation of the system.

[0006] To achieve the above objectives, one or more embodiments of the present invention provide the following technical solutions:

[0007] The first aspect of this invention provides a method for assessing the health status of an electrolytic cell.

[0008] The method for assessing the health status of an electrolytic cell includes the following steps:

[0009] According to the set sampling frequency, multiple samples are collected from a single drainage of the steam-water mixture generated at the cathode of the electrolytic cell after it has been processed by the steam-water separator.

[0010] The water volume and quality of a single drainage are tested, and it is determined whether there are any abnormalities in the various degradation parameters of the electrolytic cell during a single drainage.

[0011] The number of times each type of degradation parameter of the electrolytic cell was abnormal was accumulated in the single drainage collected multiple times, and the cumulative number of abnormalities for each type of degradation parameter was obtained.

[0012] An electrolyzer health status assessment model was established, and the electrolyzer health index was obtained based on the cumulative number of abnormalities for each type of degradation parameter.

[0013] The health status of electrolyzers is assessed based on the electrolyzer health index.

[0014] A second aspect of the present invention provides an electrolytic cell health status assessment system.

[0015] Electrolyzer health status assessment system, including:

[0016] The data acquisition module is configured to collect data multiple times from a single drainage of the steam-water mixture generated at the cathode of the electrolytic cell after it has been processed by the steam-water separator, according to a set acquisition frequency.

[0017] The anomaly detection module is configured to: perform water quantity and water quality detection for a single drainage, and determine whether there are any anomalies in various degradation parameters of the electrolytic cell during a single drainage;

[0018] The accumulation module is configured to: accumulate the number of times each type of degradation parameter of the electrolytic cell is abnormal in multiple single drainage collections, and obtain the cumulative number of abnormalities for each type of degradation parameter;

[0019] The modeling module is configured to: establish an electrolyzer health status assessment model and obtain an electrolyzer health index based on the cumulative number of abnormalities for each type of degradation parameter;

[0020] The evaluation module is configured to evaluate the health status of the electrolyzer based on the electrolyzer health index.

[0021] The above one or more technical solutions have the following beneficial effects:

[0022] This invention provides a method and system for assessing the health status of an electrolyzer. It employs time-sharing control of a first and second solenoid valve to achieve intermittent and precise monitoring of cathode drainage. The monitored liquid level is compared with a preset threshold to determine if membrane permeation is abnormal. When the liquid level monitoring is normal, further multi-ion detection of the water quality is performed. Based on the multi-ion detection results, it is determined whether there are abnormalities in membrane permeability, electrode corrosion, or pipe corrosion. Combining liquid level anomalies with multi-ion detection, the fault source (membrane / electrode / pipeline) is accurately located. Furthermore, this invention establishes an electrolyzer health status assessment model to achieve electrolyzer health status assessment and reduce unplanned system downtime.

[0023] This invention improves upon existing PEM (Polymer Electrolysis) water electrolysis hydrogen production systems by adding a first branch and a second branch, both connected in parallel to a gas-water separator. The first and second branches are equipped with a first solenoid valve and a second solenoid valve, respectively. Additionally, a third solenoid valve, a water quantity analyzer, a water quality monitoring module, a level sensor, and their connecting branches are added. By opening the second solenoid valve, the single-pass drainage of the gas-water mixture generated at the electrolyzer cathode after processing by the gas-water separator is collected, thereby enabling the detection of water quantity and quality.

[0024] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0026] Figure 1 This is a flowchart of the method in Example 1.

[0027] Figure 2 This is a schematic diagram of the PEM water electrolysis hydrogen production system in Example 1.

[0028] Figure 3 This is a diagram illustrating the process of water quantity and water quality testing in Example 1.

[0029] The attached diagram lists the components represented by each number as follows:

[0030] 1. Circulating water tank, 2. Electrolyzer, 3. Water pump, 4. Hydrogen production power supply, 5. Gas-water separator, 6. First liquid level sensor, 7. Hydrogen purification system, 8. Main solenoid valve, 9. First branch, 10. Second branch, 11. First solenoid valve, 12. Second solenoid valve, 13. Water volume analyzer, 14. Water quality monitoring module, 15. Third solenoid valve, 16. Second liquid level sensor, 17. Oxygen purification system. Detailed Implementation

[0031] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations of the present invention.

[0033] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0034] Example 1

[0035] This embodiment provides a method for assessing the health status of an electrolyzer, applied in the field of hydrogen production through water electrolysis. By combining water volume detection with multi-ion detection of water quality, the lifespan of the electrolyzer is determined and fault warnings are provided. Overall, this embodiment uses time-division control of the first solenoid valve 11 and the second solenoid valve 12 based on the frequency of drainage to achieve intermittent and precise monitoring of cathode drainage. The monitored liquid level is compared with a preset threshold to determine whether the membrane has abnormal leakage. When the liquid level monitoring is normal, multi-ion detection of water quality is further performed. Based on the results of the multi-ion detection, it is determined whether there are abnormalities in membrane permeability, electrode corrosion, or pipe corrosion. Combining liquid level anomalies with multi-ion detection, the fault source (membrane / electrode / pipeline) is accurately located. An electrolyzer health status assessment model is established to achieve electrolyzer health status assessment and reduce unplanned system downtime.

[0036] Before providing a detailed explanation of the technical solution in this embodiment, the PEM water electrolysis hydrogen production system provided in this embodiment will be described first.

[0037] The PEM electrolysis water hydrogen production system in this embodiment includes the following components: a power conversion unit, an electrolyzer 2, a gas-liquid separation system, a thermal management system, a control system, a hydrogen purification system 7, an oxygen purification system 17, and auxiliary facilities. The hydrogen purification system 7 and the oxygen purification system 17 are optional equipment. More specifically, in this embodiment, the PEM electrolysis water hydrogen production system includes a hydrogen production power supply 4, an electrolyzer 2, a circulating water tank 1, an oxygen purification system 17, a hydrogen purification system 7, a chiller, a pure water system, a heat exchanger, a pressure buffer tank, a liquid seal, a water pump 3, a gas-liquid separator 5, a condenser, an electrically operated valve, a temperature sensor, a solenoid valve, a flow sensor, a level sensor, a water quantity analyzer 13, and a water quality monitoring module 14.

[0038] like Figure 2 As shown, some equipment in the PEM water electrolysis hydrogen production system has been omitted to provide a more targeted explanation of the improvements in this embodiment. It is understood that the omitted equipment, its specific working principles, and connection relationships are all conventional techniques well-known to those skilled in the art.

[0039] In existing PEM electrolysis water hydrogen production systems, the gas-water separator 5 is connected to the circulating water tank 1 via only one solenoid valve. This embodiment improves upon the existing PEM electrolysis water hydrogen production system by adding a first branch 9 and a second branch 10 connected to the gas-water separator 5 and arranged in parallel. The first branch 9 and the second branch 10 are respectively equipped with a first solenoid valve 11 and a second solenoid valve 12. In addition, a third solenoid valve 15, a water quality tester, a water quality monitoring module 14, a liquid level sensor, and their connecting branches are also added.

[0040] like Figure 2 As shown, the gas-water separator 5 separates hydrogen and water. Hydrogen is connected to the hydrogen purification system 7 via a gas pipeline, while water flows through a liquid pipeline to one of two parallel branches. Specifically, in this embodiment, the downstream of the liquid pipeline connected to the gas-water separator 5 is divided into a first branch 9 and a second branch 10 via the first solenoid valve 11 and the second solenoid valve 12. One end of both the first branch 9 and the second branch 10 is connected to the gas-water separator 5, the other end of the first branch 9 is connected to the circulating water tank 1, and the other end of the second branch 10 is connected to the water volume tester 13. The first solenoid valve 11 is installed on the first branch 9, and the second solenoid valve 12 is installed on the second branch 10. The first solenoid valve 11 controls the opening and closing of the first branch 9, and the second solenoid valve 12 controls the opening and closing of the second branch 10.

[0041] A water volume meter 13 is installed at the connection end of the second branch 10 to detect the collected single drainage. A second liquid level sensor 16 is installed in the water volume meter 13. A drainage pipe is connected to the water volume meter 13, and a third solenoid valve 15 is installed on the drainage pipe. It can be understood that the third solenoid valve 15 is used to control the discharge of water from the water volume meter 13. The water quality monitoring module 14 is used to detect the water quality in the water volume meter 13 in real time. The opening of the second solenoid valve 12 is used to collect data for a single drainage.

[0042] The overall connection relationship of the PEM water electrolysis hydrogen production system provided in this embodiment is described as follows:

[0043] like Figure 2 As shown, the pipeline of the external water supply system is connected to the circulating water tank 1, and pure water is supplied to the circulating water tank 1 through the external water supply system.

[0044] The circulating water tank 1 and the electrolytic cell 2 are connected by a water supply pipeline. A water pump 3 is installed on the water supply pipeline to transport water from the circulating water tank 1 to the electrolytic cell 2.

[0045] Hydrogen power source 4 is connected to electrolyzer 2, where water electrolysis is performed.

[0046] Hydrogen generated at the cathode of electrolytic cell 2 is transported to steam-water separator 5 through pipeline to separate the water mixed in the hydrogen. A first liquid level sensor 6 is installed in steam-water separator 5.

[0047] The hydrogen separated by the gas-water separator 5 is sent to the hydrogen purification system 7 for hydrogen purification.

[0048] After being separated by the steam-water separator 5, the water flows through the main solenoid valve 8 installed on the liquid pipeline to either the first branch 9 or the second branch 10, which are arranged in parallel. The opening and closing of the first branch 9 and the second branch 10 are controlled by the first solenoid valve 11 and the second solenoid valve 12, respectively.

[0049] When the first solenoid valve 11 is opened, water flows through the first branch 9 to the circulating water tank 1, thus realizing the recycling of water.

[0050] When the second solenoid valve 12 is opened, water flows through the second branch 10 to the water quantity tester 13, thereby realizing water quantity detection, and realizing water quality multi-ion detection through the water quality monitoring module 14.

[0051] The oxygen produced at the anode of electrolytic cell 2 and the liquid water are transported together through pipelines to the circulating water tank 1. The liquid water continues to circulate, while the oxygen is transported to the oxygen purification system 17 for treatment.

[0052] In this embodiment, the water quality monitoring module 14 can be an ion detector. In other embodiments, other instruments can also be used to detect ions in the water; this embodiment does not impose any restrictions on this.

[0053] The technical solution of this embodiment will be explained in detail below. Figure 1 As shown, the method for assessing the health status of an electrolytic cell includes the following steps:

[0054] According to the set sampling frequency, multiple samples are collected from a single drainage of the steam-water mixture generated at the cathode of the electrolytic cell after it has been processed by the steam-water separator.

[0055] The water volume and quality of a single drainage are tested, and it is determined whether there are any abnormalities in the various degradation parameters of the electrolytic cell during a single drainage.

[0056] The number of times each type of degradation parameter of the electrolytic cell was abnormal was accumulated in the single drainage collected multiple times, and the cumulative number of abnormalities for each type of degradation parameter was obtained.

[0057] An electrolyzer health status assessment model was established, and the electrolyzer health index was obtained based on the cumulative number of abnormalities for each type of degradation parameter.

[0058] The health status of electrolyzers is assessed based on the electrolyzer health index.

[0059] As mentioned above, this embodiment improves the structure of the existing PEM water electrolysis hydrogen production system. Based on the improved PEM water electrolysis hydrogen production system, the single drainage of the gas-water mixture generated by the cathode of electrolyzer 2 after treatment by gas-water separator 5 is collected multiple times. The water quantity and water quality (i.e., multi-ion detection) of each collected single drainage are detected. Based on the detection results, the health index of the electrolyzer is modeled and calculated, and the health status of the electrolyzer is evaluated based on the health index.

[0060] Furthermore, according to the set sampling frequency, multiple samples are collected from the single drainage of the steam-water mixture generated at the cathode of the electrolytic cell after treatment by the steam-water separator. The specific implementation process includes:

[0061] The first branch 9 and the second branch 10 are set in parallel. One end of the first branch 9 and the second branch 10 are connected to the steam-water separator 5. The other end of the first branch 9 is connected to the circulating water tank 1. The other end of the second branch 10 is connected to the water volume tester 13.

[0062] A first solenoid valve 11 is provided on the first branch 9, and a second solenoid valve 12 is provided on the second branch 10. The first solenoid valve 11 is used to control the opening and closing of the first branch 9, and the second solenoid valve 12 is used to control the opening and closing of the second branch 10.

[0063] After the steam-water separator 5 has been running for a set period of time, it will drain water once through the first branch 9 or the second branch 10.

[0064] The control logic is determined according to the set acquisition frequency, and the opening and closing of the first solenoid valve 11 and the second solenoid valve 12 are controlled according to the control logic to realize the single drainage flow to the circulating water tank 1 or the water volume tester 13.

[0065] When a single drainage flow is directed to the water volume tester 13, a single data collection of the single drainage is achieved.

[0066] By repeatedly opening and closing the second solenoid valve 12, the water flow from a single drainage event is directed to the water volume tester 13 multiple times, thus enabling multiple data collections from a single drainage event.

[0067] In this embodiment, after the steam-water separator 5 has been running for a set period of time, it drains water once through the first branch 9 or the second branch 10. The control logic is determined according to the set acquisition frequency, and the opening and closing of the first solenoid valve 11 and the second solenoid valve 12 are controlled according to the control logic to realize the single drainage flow to the circulating water tank 1 or the water volume tester 13.

[0068] In simple terms, the gas-water separator 5 separates the mixture of hydrogen and water supplied from the cathode of the electrolytic cell 2. Water accumulates in the gas-water separator 5, and after a set accumulation time, it needs to be discharged. For ease of description, each drainage after the gas-water separator 5 has separated the gas and water for a set time is called a single drainage. In the prior art, the water accumulated in the gas-water separator 5 is only recycled to the circulating water tank 1. However, in this embodiment, the first solenoid valve 11 and the second solenoid valve 12 are opened and closed according to a set control logic to collect data from each single drainage.

[0069] In this embodiment, after the current hydrogen production system starts operating normally, a timer begins, and the controller issues a control drainage signal according to the preset control logic of the solenoid valves. The control logic for controlling the first solenoid valve 11 and the second solenoid valve 12 can be as follows:

[0070] When the time is within the time interval (1,n], [n+2,2n], [2n+2,3n], [3n+2,4n]..., each drainage of the gas-water separator 5 is directed to the first branch 9, that is, the first solenoid valve 11 is opened and the second solenoid valve 12 is closed to drain water. The opening time for each time is t; n represents the time in minutes.

[0071] When the time is within the time interval n+1, 2n+1, 3n+1, 4n+1..., the single drainage of the gas-water separator 5 is directed to the second branch 10, that is, the second solenoid valve 12 is opened and the first solenoid valve 11 is closed for drainage, and the opening time is t1 each time.

[0072] For example, if n is set to 50, the steam-water separator 5 will discharge the accumulated water once per minute. That is, during the 1-50 minute operating period, the first solenoid valve 11 will be opened once per minute, and the single drainage required by the steam-water separator 5 will be transported to the circulating water tank 1 through the first branch 9 for recycling.

[0073] At the 51st minute of operation, the second solenoid valve 12 is opened once, and the single drainage discharged by the steam-water separator 5 is sent to the water volume tester 13 through the second branch 10 for subsequent water volume and water quality testing.

[0074] During the period from the 52nd minute to the 100th minute of operation, the first solenoid valve 11 is opened once per minute, discharging water once per minute. The single-time drainage discharged from the steam-water separator 5 is transported to the circulating water tank 1 through the first branch 9 for recycling. This cycle is repeated continuously.

[0075] Furthermore, the control logic is determined based on the set acquisition frequency, and the opening and closing of the first and second solenoid valves are controlled according to the control logic, specifically as follows:

[0076] Determine the ratio of the number of times the first solenoid valve 11 and the second solenoid valve 12 are opened;

[0077] Based on the ratio of the number of times the first solenoid valve 11 and the second solenoid valve 12 are opened, and combined with the acquisition frequency, the control logic of the first solenoid valve 11 and the second solenoid valve 12 is determined.

[0078] In this embodiment, the sampling frequency refers to the frequency of sampling a single drainage. For example, it is set to sample a single drainage every 50 minutes for water volume and water quality detection. Since a single drainage needs to be performed every minute, the ratio of the number of times the first solenoid valve 11 and the second solenoid valve 12 are opened is 49:1, that is, the second solenoid valve 12 is opened and closed once for every 49 openings and closings of the first solenoid valve 11.

[0079] In this embodiment, the first solenoid valve 11 and the second solenoid valve 12 are accurately controlled by a PLC controller. A water flow meter 13 and a water quality monitoring module 14 are used to periodically test the cathode discharge volume and detect multiple ions in the water quality, acquiring data. Based on the water flow and multiple ion detection results, the failure mode of the electrolyzer 2 is determined. Simultaneously, a model prediction is performed based on long-term collected big data to obtain an electrolyzer health index. Based on this index, the health status of the electrolyzer is assessed, assisting in real-time shutdown or prediction of cell lifespan, avoiding unplanned shutdowns, and achieving stable, safe, and efficient operation of the hydrogen production system.

[0080] Furthermore, in this embodiment, the various degradation parameters of the electrolytic cell specifically include the volume of water discharged in a single run, and the concentrations of fluoride ions, titanium ions or nickel ions, and ferric ions in the water discharged in a single run.

[0081] like Figure 3 The diagram shows the specific process of water quantity and water quality testing. The water quantity testing specifically involves:

[0082] Set the liquid level retention threshold a and the maximum liquid level threshold L1 of the water volume tester 13;

[0083] When the volume of water discharged in a single operation is higher than L1+a, it is determined that the membrane permeation of electrolytic cell 2 is abnormal.

[0084] When the water volume of a single drainage is lower than L1, it is determined that the second solenoid valve 12 is damaged, and an alarm and emergency stop are triggered.

[0085] When the volume of water discharged in a single operation is between L1 and L1+a, it is determined that the water volume detection of electrolytic cell 2 is normal.

[0086] Furthermore, when the water volume of a single drainage operation is found to be normal, water quality testing is conducted, specifically as follows:

[0087] Determine whether the fluoride ion concentration in a single drainage is less than a preset threshold. If not, determine that the membrane permeability of electrolyzer 2 is abnormal.

[0088] Determine whether the concentration of titanium ions or nickel ions in a single drainage is less than a preset threshold. If not, determine that the corrosion of the second electrode plate of the electrolytic cell is abnormal.

[0089] Determine whether the concentration of ferric ions in a single drainage is less than a preset threshold. If not, determine that the corrosion of the pipe fittings in electrolytic cell 2 is abnormal.

[0090] Specifically, determining whether the concentration of titanium or nickel ions in a single drainage cycle is less than a preset threshold, and if not, indicating abnormal corrosion of the second electrode plate in the electrolytic cell, refers to:

[0091] When the concentration of titanium ions or nickel ions in a single drainage is not less than a preset threshold, the corrosion of the second electrode plate of the electrolytic cell is judged to be abnormal.

[0092] like Figure 3 As shown, after the system is running stably, the specific procedures for water quantity and water quality testing are executed. After completion, any abnormalities observed during the water quantity and water quality testing processes, such as abnormal membrane permeation, abnormal electrolytic cell membrane permeability, abnormal electrolytic cell electrode corrosion, and abnormal electrolytic cell pipe corrosion, are accumulated. The accumulated results are then analyzed to calculate the electrolytic cell health index and determine the health status of the electrolytic cell. Finally, based on the electrolytic cell health status determination results, maintenance actions are performed. After this maintenance action is completed, the next water quantity and water quality testing process is repeated, and this cycle continues.

[0093] After conducting water quantity and water quality tests, the water volume meter 13 needs to be drained to ensure the remaining water level in the meter is at the liquid level retention threshold 'a', facilitating the next single-drainage sampling. Specifically, the third solenoid valve 15 is opened for time t2 to drain the water from the meter 13 until the remaining water level in the meter 13 reaches the liquid level retention threshold 'a'.

[0094] Furthermore, by accumulating the frequencies of various ion and liquid level anomalies, and calculating the overall health index (HI) of the electrolyzer using a weighted algorithm, a health status assessment model for the electrolyzer is established, specifically as follows:

[0095] =1- ;

[0096] HI= ;

[0097] HI= ;

[0098] in, This represents the normalization function, used to map parameters to the interval [0,1], where 0 represents complete failure and 1 represents healthy. Represents the i-th type of degradation parameter; Indicates the weighting coefficient. =1, priority is determined by regression analysis of historical fault data; Nmax represents the cumulative number of times each type of degradation parameter has anomalies; express Class degradation parameters; HI represents the cumulative number of abnormal occurrences of the i-th type of degradation parameter; HI represents the electrolytic cell health index.

[0099] Furthermore, the health status of the electrolyzer is assessed based on the electrolyzer health index, specifically as follows:

[0100] Set the first health threshold, the second health threshold, and the third health threshold sequentially from low to high;

[0101] When the health index of the electrolytic cell is lower than the first health threshold, it is determined that the electrolytic cell 2 is severely aged and on the verge of failure.

[0102] When the health index of the electrolyzer is between the first health threshold and the second health threshold, the electrolyzer 2 is judged to be moderately degraded.

[0103] When the health index of the electrolyzer is below the second health threshold and the third health threshold, the electrolyzer 2 is judged to be slightly degraded.

[0104] When the health index of the electrolyzer is higher than the third health threshold, the electrolyzer 2 is judged to be healthy.

[0105] The specific values ​​of the first health threshold, the second health threshold, and the third health threshold can be set according to the actual situation.

[0106] The number of times each type of degradation parameter in the electrolytic cell occurred abnormally in multiple single drainage samples was accumulated to obtain the cumulative number of abnormalities for each type of degradation parameter, specifically including:

[0107] The liquid level is detected and judged by the second liquid level sensor 16. When the liquid level detection result of the second liquid level sensor 16 is greater than L1+a, it indicates that the membrane permeation is abnormal and the cumulative number of fault warnings for abnormal membrane permeation is recorded in real time.

[0108] When L1≤ the liquid level detection result of the second liquid level sensor 16≤L1+a, it indicates that the membrane permeation is normal. The water quality monitoring module 14 is then activated to detect the concentration of key water ions and record the cumulative number of fault warnings for each type of ion exceeding the standard in real time.

[0109] Based on the cumulative number of fault warnings, the health index of the electrolytic cell is calculated and maintenance actions are performed.

[0110] As shown in Table 1, this embodiment also provides a table comparing the electrolytic cell health assessment results and the actions to be performed. For ease of description, the first health threshold, the second health threshold, and the third health threshold are represented as a, b, and c, respectively, where a < b < c ≤ 1.

[0111] Table 1: Comparison Table of Electrolytic Cell Health Assessment Results and Execution Actions

[0112]

[0113] This embodiment achieves real-time water volume detection by automatically switching between the first solenoid valve 11 and the second solenoid valve 12 in a time-sharing manner, and uses a water quality monitoring module 14 to monitor water ions in the drainage in real time. The health index of the electrolyzer is evaluated by the number of early warning failures, thereby reducing the occurrence of unplanned downtime.

[0114] Example 2

[0115] This embodiment discloses an electrolytic cell health status assessment system.

[0116] Electrolyzer health status assessment system, including:

[0117] The data acquisition module is configured to collect data multiple times from a single drainage of the steam-water mixture generated at the cathode of the electrolytic cell after it has been processed by the steam-water separator, according to a set acquisition frequency.

[0118] The anomaly detection module is configured to: perform water quantity and water quality detection for a single drainage, and determine whether there are any anomalies in various degradation parameters of the electrolytic cell during a single drainage;

[0119] The accumulation module is configured to: accumulate the number of times each type of degradation parameter of the electrolytic cell is abnormal in multiple single drainage collections, and obtain the cumulative number of abnormalities for each type of degradation parameter;

[0120] The modeling module is configured to: establish an electrolyzer health status assessment model and obtain an electrolyzer health index based on the cumulative number of abnormalities for each type of degradation parameter;

[0121] The evaluation module is configured to evaluate the health status of the electrolyzer based on the electrolyzer health index.

[0122] Those skilled in the art will understand that the modules or steps of the present invention described above can be implemented using general-purpose computer devices. Optionally, they can be implemented using computer-executable program code, thereby allowing them to be stored in a storage device for execution by a computer device, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. The present invention is not limited to any particular combination of hardware and software.

[0123] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A method for assessing the health status of an electrolytic cell, characterized in that, Includes the following steps: According to a set sampling frequency, multiple samplings are performed on the single drainage of the steam-water mixture generated at the cathode of the electrolytic cell after processing by the steam-water separator. The specific implementation process includes: setting up a first branch and a second branch in parallel; one end of each branch is connected to the steam-water separator, the other end of the first branch is connected to a circulating water tank, and the other end of the second branch is connected to a water volume analyzer; a first solenoid valve is installed on the first branch, and a second solenoid valve is installed on the second branch. The first solenoid valve controls the opening and closing of the first branch, and the second solenoid valve controls the opening and closing of the second branch; after the steam-water separator has run for a set period, single drainage is performed through either the first or second branch; control logic is determined according to the set sampling frequency, and the opening and closing of the first and second solenoid valves are controlled according to the control logic to direct the single drainage to the circulating water tank or the water volume analyzer; when the single drainage flows to the water volume analyzer, one sampling of the single drainage is achieved; through multiple opening and closing of the second solenoid valve, the single drainage flows to the water volume analyzer multiple times, achieving multiple samplings of the single drainage. The water volume and quality of a single drainage are tested, and it is determined whether there are any abnormalities in the various degradation parameters of the electrolytic cell during a single drainage. The cumulative number of abnormal occurrences of each type of degradation parameter in the electrolytic cell during multiple single drainage collections is obtained; the degradation parameters include the volume of water discharged in a single drainage and the concentrations of fluoride ions, titanium ions or nickel ions, and ferric ions in the water quality of the single drainage. An electrolyzer health status assessment model was established, and an electrolyzer health index was obtained based on the cumulative number of abnormalities for each type of degradation parameter. The established electrolyzer health status assessment model is as follows: =1- ； HI= ; in, This represents the normalization function, used to map parameters to the interval [0,1], where 0 represents complete failure and 1 represents healthy. Represents the i-th type of degradation parameter; N represents the weight coefficient of the i-th type of degradation parameter; Nmax represents the cumulative number of times each type of degradation parameter is abnormal; This represents the cumulative number of times the i-th type of degradation parameter has become abnormal; express Class degradation parameter; HI represents the electrolytic cell health index; The health status of electrolyzers is assessed based on the electrolyzer health index.

2. The method for assessing the health status of an electrolytic cell as described in claim 1, characterized in that, The control logic is determined based on the set acquisition frequency, and the opening and closing of the first and second solenoid valves are controlled according to the control logic, specifically as follows: Determine the ratio of the number of times the first solenoid valve and the second solenoid valve open. Based on the ratio of the number of times the first solenoid valve and the second solenoid valve open, and in conjunction with the sampling frequency, the control logic of the first solenoid valve and the second solenoid valve is determined.

3. The method for assessing the health status of an electrolytic cell as described in claim 1, characterized in that, The water volume detection specifically includes: Set the liquid level retention threshold 'a' and the maximum liquid level threshold 'L1' for the water volume tester; When the volume of water discharged in a single instance is higher than L1+a, it is determined that there is an abnormal amount of membrane permeation in the electrolytic cell. When the volume of water drained in a single operation is less than L1, the second solenoid valve is deemed to be damaged. When the volume of water discharged in a single operation is between L1 and L1+a, the water volume detection of the electrolytic cell is considered normal.

4. The method for assessing the health status of an electrolytic cell as described in claim 3, characterized in that, When the water volume of a single drainage operation is normal, water quality testing is performed, specifically as follows: Determine whether the fluoride ion concentration in a single drainage is less than a preset threshold. If not, determine that the permeability of the electrolytic cell membrane is abnormal. Determine whether the concentration of titanium ions or nickel ions in a single drainage is less than a preset threshold. If not, determine that the electrolytic cell electrode plate is corroded abnormally. Determine whether the concentration of ferric ions in a single drainage is less than a preset threshold. If not, then determine that the electrolytic cell pipes are corroded abnormally.

5. The method for assessing the health status of an electrolytic cell as described in claim 1, characterized in that, The health status of the electrolyzer is assessed based on the electrolyzer health index, specifically as follows: Set the first health threshold, the second health threshold, and the third health threshold sequentially from low to high; When the health index of the electrolytic cell is lower than the first health threshold, it is determined that the electrolytic cell is severely aged and on the verge of failure. When the health index of the electrolyzer is between the first health threshold and the second health threshold, the electrolyzer is judged to be moderately degraded. When the health index of the electrolyzer is below the second and third health thresholds, the electrolyzer is judged to be slightly degraded. When the health index of the electrolytic cell is higher than the third health threshold, the health of the electrolytic cell is determined.

6. The method for assessing the health status of an electrolytic cell as described in claim 3, characterized in that: After conducting water quantity and water quality tests, the water volume meter is drained once to bring the remaining water volume in the meter to the liquid level retention threshold 'a' before the next single drainage is performed.

7. An electrolytic cell health status assessment system, characterized in that, include: The data acquisition module is configured to collect data multiple times from a single drainage run of the steam-water mixture generated at the cathode of the electrolytic cell after treatment by a steam-water separator, according to a set acquisition frequency. Specifically, this involves: setting up a first branch and a second branch in parallel; one end of each branch is connected to the steam-water separator; the other end of the first branch is connected to a circulating water tank; and the other end of the second branch is connected to a water volume analyzer. A first solenoid valve is installed on the first branch, and a second solenoid valve is installed on the second branch. The first solenoid valve is used to control the... The second solenoid valve controls the opening and closing of the second branch. After the steam-water separator has run for a set period, it drains water once through either the first or second branch. The control logic is determined according to the set sampling frequency, and the opening and closing of the first and second solenoid valves are controlled according to the control logic to realize the single drainage flow to the circulating water tank or the water volume tester. When the single drainage flows to the water volume tester, a single sampling of the single drainage is realized. Through the multiple opening and closing of the second solenoid valve, the single drainage flows to the water volume tester multiple times, realizing multiple sampling of the single drainage. The anomaly detection module is configured to: detect the water volume and water quality of a single drainage, and determine whether there are any anomalies in various degradation parameters of the electrolytic cell during a single drainage; the degradation parameters include the water volume of the single drainage and the concentrations of fluoride ions, titanium ions or nickel ions, and ferric ions in the water quality of the single drainage. The accumulation module is configured to: accumulate the number of times each type of degradation parameter of the electrolytic cell is abnormal in multiple single drainage collections, and obtain the cumulative number of abnormalities for each type of degradation parameter; The modeling module is configured to: establish an electrolyzer health status assessment model, and obtain the electrolyzer health index based on the cumulative number of anomalies for each type of degradation parameter; the established electrolyzer health status assessment model is specifically as follows: =1- ； HI= ; in, This represents the normalization function, used to map parameters to the interval [0,1], where 0 represents complete failure and 1 represents healthy. Represents the i-th type of degradation parameter; N represents the weight coefficient of the i-th type of degradation parameter; Nmax represents the cumulative number of times each type of degradation parameter is abnormal; This represents the cumulative number of times the i-th type of degradation parameter has become abnormal; express Class degradation parameter; HI represents the electrolytic cell health index; The evaluation module is configured to evaluate the health status of the electrolyzer based on the electrolyzer health index.

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