ODC-IEM electrolytic bath integration device and control method

Abstract

The invention discloses an ODC-IEM electrolytic cell integration device and a control method. The ODC-IEM electrolytic cell integration device comprises a plurality of electrolytic cell modules, a plurality of electrolytic cell modules and a plurality of electrolytic cell modules, a controller; cathode and anode fluid passages of all the electrolytic cell modules are arranged in parallel, and salt solution inlets of anode chambers of all the electrolytic cell modules are connected into the salt solution inlet pipeline in parallel; the chlorine outlets of the anode chambers of the electrolytic cell modules are connected into the chlorine outlet pipeline in parallel; the alkaline solution outlets of the alkaline solution chambers of the electrolytic cell modules are connected into the concentrated alkaline outlet pipeline in parallel; the oxygen inlets of the oxygen chambers of the electrolytic cell modules are connected into the oxygen inlet pipeline in parallel; the water inlets of the alkali liquor chambers of the electrolytic cell modules are connected into the water inlet pipeline in parallel; and the saline solution outlets of the anode chambers of the electrolytic cell modules are connected into the saline solution outlet pipeline in parallel. And the integration performance of the electrolytic cell is improved.

Description

Technical Field

[0001] This invention relates to the field of chemical reaction equipment technology, specifically to an integrated ODC-IEM electrolytic cell device and control method. Background Technology

[0002] The chlor-alkali industry refers to a fundamental industry that produces caustic soda from salt as the main raw material through the electrolysis of aqueous solution. This industry plays a crucial role in driving industrial technological development. Since the core technology of caustic soda production via electrolysis involves the electrolysis of industrial brine to produce caustic soda and byproducts such as chlorine, this process consumes a significant amount of industrial electricity. Therefore, reducing energy consumption during the electrolysis process is of paramount importance.

[0003] In the industrial production of caustic soda, the main technical methods are: diaphragm method, caustic soda method, and oxygen cathode ion membrane method. All of these processes require electrolytic cells. The electrolysis efficiency of the electrolytic cell directly affects the energy consumption of industrial production, the reliability of the electrolytic cell directly affects the production efficiency, and the industrial stacking configuration of the electrolytic cell directly affects the scale of production capacity. Therefore, it is urgent to develop electrolytic cell devices that can achieve large-scale commercial production of caustic soda, as well as technical solutions for multi-chamber series connection and main pipe parallel connection, and to develop a more stable and reliable oxygen cathode electrolytic cell structural sealing scheme to improve operational reliability and reduce the cost of caustic soda manufacturing.

[0004] Taking an oxygen cathode ion membrane electrolyzer for chlor-alkali industry as an example, the oxygen cathode ion membrane electrolyzer is made by welding tubes and plates. Each small cell is sealed with PTFE tape. The fluid distribution pipeline is made by welding square tubes in series. The entire tank is connected by multiple modular small cells.

[0005] However, the existing technology has at least the following technical problems: 1. The electrolytic cell is complex to form, has poor batch assembly consistency, and low operational reliability. Existing technologies all use multiple pipelines and plates of different materials for welding. This type of technology has a large number of welding points. Strong alkali has serious chemical corrosiveness. In actual application, leakage of liquid and gas frequently occurs, causing the cell to fail to operate, which seriously affects the efficiency of industrial production. 2. The assembly process of the electrolytic cell is complex, the sealing method is simple, and it is greatly affected by external operations, which cannot meet the requirements of commercial mass production. Some existing technologies use PTFE tape or coating with paint and on-site injection of silicone rubber. Such solutions have poor consistency in application, cannot be disassembled and reused after one coating or filling, and are difficult to solve when problems occur in a single chamber, which is not conducive to large-scale commercial application and promotion. 3. The control method of the electrolytic cell has poor robustness and the fault diagnosis method is limited. The control method and fault diagnosis of the electrolytic cell are not robust enough for various scenarios. It is impossible to achieve accurate fault mode identification and fault diagnosis algorithm improvement, and it is impossible to achieve fault early warning processing, self-health prediction and algorithm adaptive repair. 4. The electrolytic cell has poor maintainability and ease of use. When a single chamber malfunctions, it is difficult to replace the internal modules, resulting in poor reusability and an inability to quickly update and iterate, which is not conducive to flexible use. Summary of the Invention

[0006] The purpose of this application is to provide an integrated device and control method for an ODC-IEM electrolytic cell, so as to at least partially solve the problems existing in the prior art. This purpose is achieved through the following technical solution: This application proposes an integrated device for an ODC-IEM electrolyzer, comprising: Multiple electrolytic cell modules, each including an anode chamber, an alkali chamber, and an oxygen chamber, wherein the anode chamber has a salt solution inlet, a salt solution outlet, and a chlorine outlet; the alkali chamber has a water inlet and an alkali solution outlet; and the oxygen chamber has an oxygen inlet and an oxygen outlet. The controller is used to adjust the working mode of the ODC-IEM electrolytic cell integrated device according to the stored control logic, and to handle the faults of the ODC-IEM electrolytic cell integrated device according to the stored fault loop logic. The anode and cathode fluid paths of each of the electrolytic cell modules are connected in parallel, wherein: The salt solution inlet pipeline is connected in parallel to the salt solution inlet pipeline of the anode chamber of each of the electrolytic cells; The chlorine outlet pipeline is connected in parallel to the chlorine outlet of the anode chamber of each of the electrolytic cell modules. The concentrated alkali outlet pipeline is connected in parallel to the alkali solution outlet of the alkali solution chamber of each of the electrolytic cell modules. The oxygen inlet pipeline is connected in parallel to the oxygen inlet of the oxygen chamber of each electrolytic cell module; The water inlet pipe is connected in parallel to the water inlet of the alkali chamber of each electrolytic cell module; The salt solution outlet pipeline is connected in parallel to the salt solution outlet pipeline of the anode chamber of each of the electrolytic cell modules.

[0007] In some embodiments, every N electrolytic cell modules are electrically connected in series to form a module, and adjacent modules are pressed and fixed together by a mechanical structure, where N is a positive integer greater than or equal to 2.

[0008] In some embodiments, the oxygen chamber and the cathode ODC are sealed and pressed together by a bonding process.

[0009] In some embodiments, the electrolytic cell module further includes a cathode chamber diffusion electrode sealing ring and an alkali chamber sealing ring; The cathode chamber diffusion electrode sealing ring is disposed between the cathode ODC and the alkali solution chamber, and a sealing ring is disposed on one side of the alkali solution chamber. The cathode chamber diffusion electrode sealing ring and the sealing ring cooperate to seal. The alkaline solution chamber sealing ring is disposed between the ion exchange membrane and the alkaline solution chamber, and an alkaline solution chamber sealing groove is provided on the other side of the alkaline solution chamber, and the alkaline solution chamber sealing ring cooperates with the sealing groove to seal.

[0010] In some embodiments, the electrolytic cell module further includes a sealing ring; The sealing ring is disposed between the anode chamber and the anode electrode frame. An anode chamber sealing groove is provided on one side of the anode chamber, and the sealing ring cooperates with the anode chamber sealing groove to seal.

[0011] In some embodiments, the anode chamber is provided with a salt solution inlet, a salt solution outlet and a chlorine gas outlet, the alkali solution chamber is provided with a water inlet and an alkali solution outlet, and the oxygen chamber is provided with an oxygen inlet and an oxygen outlet, both of which are equipped with quick-connect connectors.

[0012] In some embodiments, a plurality of vapor-liquid separation baffles are provided in the section before the chlorine outlet of the anode chamber.

[0013] The present invention also provides a control method based on the ODC-IEM electrolytic cell integrated device described above, the method comprising: The operating mode of the ODC-IEM electrolytic cell integrated device is adjusted according to the stored control logic.

[0014] In some embodiments, the method further includes: Collect multidimensional operational data of the electrolytic cell; The multidimensional operating data is transmitted to the real-time monitoring layer. The real-time monitoring layer compares the data deviations in real time to determine the trend of electrolytic cell performance changes. The real-time monitoring layer monitors whether the control data reaches the preset target. By monitoring whether the control target is reached, the degree of complexity of the operating conditions is determined. If the control target is not reached, the electrolytic cell performance is abnormal, and the fault warning system is triggered. According to the fault handling methods at different levels, the electrolytic cell operation fault problem is resolved. The intelligent analysis layer analyzes the data from the monitoring layer and the data from multiple databases on the host computer to determine whether there is an anomaly in the status, what type of fault should be reported if there is an anomaly, and then quickly resolves the abnormal problems that occur during the operation of the electrolytic cell. Based on the output of the intelligent analysis layer, fault warning and health prediction are performed using the mechanism model method, data-driven method, and scenario verification method.

[0015] In some embodiments, when using the mechanistic model method for fault warning and health prediction, fault warning and health prediction are based on the voltage change mechanism of the electrolyzer during electrochemical application. In the electrochemical mechanism of the battery cell, due to the scouring of reactants and the shedding of catalysts, the cell voltage gradually increases with the length of the operating time. The trend and rate of increase of the cell voltage are obtained through experimental data to establish a mechanistic model, judge the performance and fault status of the electrolyzer at each stage, and evaluate its health. When using data-driven methods for fault warning and health prediction, the data-driven method utilizes operating condition control to evaluate the performance of the electrolyzer. A typical data-driven method is the operating condition sensitivity data-driven method. Under preset operating conditions, the solution control temperature, flow rate, and pressure of the electrolyzer are adjusted by data control. The changes in voltage performance and current efficiency of the electrolyzer under these operating conditions are monitored. By comparing efficiency data, the fault status and health status of the electrolyzer are obtained. Data-driven methods are beneficial for obtaining the optimal operating conditions and the optimal operating efficiency, and effectively evaluating the health of the electrolyzer. If no corresponding performance change results are obtained for changes in different sensitive conditions, it is considered that the electrolyzer is in a fault state or a warning state. When using scenario verification for fault warning and health prediction, the warning and health prediction are combined with different application scenarios of the electrolytic cell. In a typical power supply fluctuation scenario, it is necessary to monitor the fault characteristics of the electrolytic cell caused by power supply fluctuation in order to obtain fault information as soon as possible. At the same time, for power supply fluctuation scenarios or frequent start-stops caused by power supply fluctuation scenarios, health evaluation and prediction are carried out to obtain the operating status of the electrolytic cell.

[0016] In one or more specific embodiments, the ODC-IEM electrolytic cell integrated device and control method provided by the present invention have the following technical effects: 1. The electrolytic cell integrated device provided by the present invention adopts a single-module configuration with functional zoning, modular structure, and digital processing. By dividing the various chambers into multiple independent and sealed series chambers through functional zoning, the processing difficulty problem is solved. The structural modules of each electrode plate and chamber are universalized. By reasonably matching multiple sets of non-shaped organic corrosion-resistant material sealing rings with sealing grooves, a sealing solution for multiple independent chambers is achieved, solving the problem of frequent gas and liquid leakage in the solution chamber, gas chamber and alkali chamber. 2. The electrolytic cell integrated device provided by the present invention has a simple and reasonable single-cell multi-chamber sealing structure, high reliability, and high ease of conversion and assembly. It can be used repeatedly without damage and can be recycled, solving the problem of single use, the problem of poor recyclability after repeated disassembly and assembly, and the problem of high difficulty in commercial mass production and assembly. 3. The electrolytic cell integrated device provided by the present invention adopts a stacked structure of multiple individual electrolytic reaction units connected in series with fluid channels, which solves the problem of inconsistent electrical performance caused by poor distribution consistency, achieves low average electrical performance, and solves problems such as high electrolysis power consumption and low efficiency. 4. The electrolytic cell integrated device provided by the present invention has good robustness in its control logic, improves the fault diagnosis and failure self-repair algorithm of the electrolytic cell, improves the self-repair algorithm and capability of the electrolytic cell's own control parameters, and achieves the goal of improving the electrolytic cell's fault self-diagnosis and health early warning.

[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is one of the structural schematic diagrams of the electrolytic cell module provided by the present invention; Figure 2 This is a second schematic diagram of the structure of the electrolytic cell module provided by the present invention; Figure 3 This is a schematic diagram of the sealing structure in the electrolytic cell module provided by the present invention; Figure 4 The simulation results of different sealing structures provided by this invention are shown in the figure. Figure 5 The simulation stress limit statistical diagram of different sealing structures provided by the present invention; Figure 6 This is a schematic diagram of the multi-cavity layout structure of the integrated electrolytic cell device provided by the present invention; Figure 7 for Figure 6 A schematic diagram of the multiphase gas or liquid distribution manifold in the multi-cavity layout structure shown; Figure 8 A flowchart illustrating the control method provided by this invention; Figure 9 This is one of the flowcharts for the scenario-verification-based electrolytic cell fault diagnosis provided by the present invention; Figure 10 This is the second schematic diagram of the process for fault diagnosis of electrolytic cells based on scenario verification provided by the present invention. Detailed Implementation

[0019] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0020] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0021] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0022] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0023] According to the embodiments of this application, the proposed ODC-IEM (oxygen cathode ion exchange membrane) electrolyzer integrated device includes multiple electrolyzer modules and a controller; wherein, the electrolyzer module includes an anode chamber 9, an alkali chamber 4, and an oxygen chamber 1, the anode chamber 9 has a salt solution inlet, a salt solution outlet, and a chlorine outlet, the alkali chamber 4 has a water inlet and an alkali solution outlet, and the oxygen chamber 1 has an oxygen inlet and an oxygen outlet; the controller is used to adjust the working mode of the ODC-IEM electrolyzer integrated device according to the stored control logic, and to handle the faults of the ODC-IEM electrolyzer integrated device according to the stored fault loop logic.

[0024] The anode and cathode fluid paths of each of the electrolytic cell modules are connected in parallel, wherein: The salt solution inlet pipe 100 is connected in parallel to the salt solution inlet pipe 100 of the anode chamber of each of the electrolytic cells; Chlorine outlet pipeline 200, the chlorine outlets of the anode chambers of each of the electrolytic cell modules are connected in parallel to the chlorine outlet pipeline 200; The concentrated alkali outlet pipeline 300 is connected in parallel to the alkali solution outlet of the alkali solution chamber of each of the electrolytic cell modules; the alkali solution outlet pipeline 300 is connected to each alkali solution chamber at the connection point C. The oxygen inlet pipe 400 is connected in parallel to the oxygen inlet of the oxygen chamber of each of the electrolytic cell modules; the oxygen inlet pipe 400 is connected to each oxygen chamber at the connection point B. Water inlet pipe 500, the water inlets of the alkali chambers of each of the electrolytic cell modules are connected in parallel to the water inlet pipe 500; The salt solution outlet pipe 600 is connected in parallel to the salt solution outlet of the anode chamber of each of the electrolytic cell modules; the salt solution outlet pipe 600 is connected to each anode chamber at connection point A.

[0025] Specifically, such as Figure 1 As shown, in the ODC-IEM electrolytic cell integrated device provided by this invention, a single electrolytic cell module includes an anode chamber, an ion-exchange membrane, a cathode alkaline solution chamber, an oxygen cathode (ODC), and an oxygen chamber. The anode chamber is designed with a NaCl solution inlet and a NaCl outlet, a vapor-liquid separation baffle 700, and... The outlet anode electrode and ion-exchange membrane are designed. The cathode alkali chamber is designed with a water inlet and a concentrated NaOH alkali outlet. The oxygen chamber is designed with an oxygen inlet, an oxygen outlet, and an oxygen cathode gas diffusion electrode. This serves as a single electrolytic cell module unit. The gas and liquid inlets and outlets of each gas chamber are sealed through prefabricated manifold flanges. The connecting flanges are sealed using a high corrosion-resistant sealing coil and a sealing groove. To ensure the operating efficiency of the electrolytic cell, a vapor-liquid separation baffle 700 is designed before the chlorine outlet in the anode chamber. Chlorine gas with a certain humidity will condense at the baffle after passing through multiple metal baffles, thereby achieving water-vapor separation of the by-product chlorine gas.

[0026] In some embodiments, every N electrolytic cell modules are electrically connected in series to form a module, and adjacent modules are mechanically clamped and fixed together, where N is a positive integer greater than or equal to 2. Preferably, N=3, that is, every three electrolytic cell modules are connected in series.

[0027] Specifically, such as Figure 6 As shown, the ODC-IEM electrolytic cell integrated device provided by this invention adopts a multi-unit series and parallel common cavity technology in its overall structure, allowing for the series connection of N electrolytic cell modules. In this embodiment, X series electrolytic cell modules 800 are used as an example, numbered 1 to X from left to right, thereby increasing the electrolytic cell's production capacity. Within each electrolytic cell module, the anode chamber includes an electrolytic cell, a parallel manifold inlet and outlet for NaCl solution, and a parallel outlet manifold for chlorine gas; the alkali chamber includes a parallel water inlet manifold and a parallel NaOH concentrated alkali outlet manifold; and the oxygen cathode chamber includes a parallel oxygen inlet manifold and an oxygen exhaust port. All manifolds are connected to the respective liquid and gas chambers via flanges or soft, corrosion-resistant rubber. The inlet and outlet mains are connected to the chambers via quick-connect pipes, such as... Figure 6 The diagram shows the connection points between the main pipe and the chamber.

[0028] like Figure 7The diagram illustrates a schematic of a parallel gas or liquid distribution manifold for a dual electrolyzer. In the inlet or outlet pipe, fluid enters from the main pipe L0 and exits through the first outlet branch pipe L1 and the second outlet branch pipe L2. Conversely, in the outlet or outlet pipe, fluid enters through a branch pipe and exits from the main pipe outlet. For functional expansion, the diameter of the branch pipes changes with the diameter of the main pipe, and the number of branch pipes increases or decreases according to requirements. Typically, the main branch manifold can have one inlet and five outlets, or one inlet and ten outlets, to enhance its scalability. Conversely, the same method can achieve a unified outlet for five branch inlets, or a unified outlet for ten branch inlets. In this application, the inconsistency in distribution caused by friction resistance along the pipeline needs to be considered. In practical applications, friction resistance and eddy current phenomena are considered, and the main pipeline is gradually narrowed and widened to address the issues of resistance reduction and increase, ultimately ensuring consistent distribution.

[0029] In some embodiments, the oxygen chamber and the cathode ODC are sealed and pressed together. The electrolytic cell module also includes a cathode chamber diffusion electrode sealing ring and an alkali chamber sealing ring; the cathode chamber diffusion electrode sealing ring is disposed between the cathode ODC and the alkali chamber, and a sealing ring is provided on one side of the alkali chamber, with the cathode chamber diffusion electrode sealing ring and the sealing ring cooperating to seal; the alkali chamber sealing ring is disposed between the ion membrane and the alkali chamber, and an alkali chamber sealing groove is provided on the other side of the alkali chamber, with the alkali chamber sealing ring and the sealing groove cooperating to seal. The electrolytic cell module also includes a sealing ring; the sealing ring is disposed between the anode chamber and the anode electrode frame, and an anode chamber sealing groove is opened on one side of the anode chamber, with the sealing ring and the anode chamber sealing groove cooperating to seal. The anode chamber has a salt solution inlet, a salt solution outlet, and a chlorine outlet; the alkali chamber has a water inlet and an alkali solution outlet; and the oxygen chamber has an oxygen inlet and an oxygen outlet, both equipped with quick-connect fittings. Multiple vapor-liquid separation baffles 700 are provided in front of the chlorine outlet of the anode chamber.

[0030] Specifically, to ensure the chamber sealing and stable and reliable operation of a single electrolytic cell, the design includes, for example... Figure 2The single electrolytic cell sealing scheme shown is used to ensure the airtightness of the anode chamber, alkali chamber, gas diffusion electrode, and oxygen chamber. Specifically, the oxygen chamber 1 and cathode ODC2 are sealed and pressed together. The cathode ODC2 and alkali chamber 4 are sealed by the mating of the cathode diffusion electrode sealing ring 3 and the alkali chamber sealing ring located on one side of the alkali chamber 4. The ion-exchange membrane 6 and alkali chamber 4 are sealed by the mating of the alkali chamber sealing ring 5 and the alkali chamber sealing groove. The anode chamber is sealed by the anode electrode frame 7 and the sealing groove 8 on one side of the anode chamber 9 under the action of the sealing ring 1. The quick-connect fittings around each chamber are sealed by threaded seals. Figure 3 The diagram shows a schematic of the generalized structural sealing design concept for the ODC-IEM electrolytic cell stack. In this diagram, h1 is the height of the top of the sealing line flange after compression, h2 is the height of the sealing line base after compression, and h3 is the depth of the sealing groove. d1 is the width of the top of the sealing line flange, and d2 is the length of the distance between the double-peak flanges of the sealing line.

[0031] To ensure a tight seal between individual cell slots, the design is as follows: Figure 4 The three types of cross-section sealing lines shown are, in detail, Figure 4 The first row in (a)-(c) shows the sealing adhesive lines of the flange structure with a large double-peak spacing; Figure 4 The second row in the middle (d)-(f) section features a double-peaked, compact design with a small pitch and flanged sealing line. Figure 4 The first row of (g)-(j) is a sealing line with a wide double peak and a large flange spacing; the three have different cross-sections, different shrinkage capacity and reaction force after being squeezed, and different stress concentration locations. Figure 4 This demonstrates the advantages and disadvantages of different design schemes, limiting the selection to the first-row design scheme. Through mechanical simulation analysis, the optimal pressure change contour plot and support reaction force contour plot are obtained. (The text then repeats itself, so the translation stops.) Figure 5 The stress comparison shown yielded the optimal cross-sectional design scheme, and the sealing line design scheme was found to be optimal in case 3. During system operation, due to the significant improvement in the sealing performance of each chamber, the operating pressure of all three chambers increased from 10 kPa·a to 300 kPa·a, resulting in a significant improvement in the electrolytic reaction and electrochemical discharge capabilities, ultimately making a significant contribution to the reduction of power consumption in the entire electrolytic cell.

[0032] This invention also provides a control method based on the ODC-IEM electrolytic cell integrated device described above. The method includes adjusting the operating mode of the ODC-IEM electrolytic cell integrated device according to stored control logic. Specifically, the control strategy for the electrolytic cell's operation process is summarized as follows, detailed as follows: Figure 9 As shown: 1. Start-up phase: The auxiliary system runs to supply the solution and gas required for the reaction, power supply, and the host computer control interface controls the load pull-in via software.

[0033] 2. Operation phase: The power supply system outputs power, and the electrolytic cell operates normally; 3. Load reduction and shutdown phase: According to the preset load control method, the load reduction operation is carried out, the current is gradually reduced to 0A, the auxiliary system is shut down, and finally the machine is shut down.

[0034] In some embodiments, the method further includes: Collect multi-dimensional operating data of the electrolyzer, such as the cell voltage of each group of cells, the liquid / gas supply pressure and flow rate of the auxiliary system, the temperature of the alkali solution entering the cell, and the temperature control of the water bath system; The multidimensional operating data is transmitted to the real-time monitoring layer. The real-time monitoring layer compares the data deviations in real time to determine the trend of electrolytic cell performance changes. The real-time monitoring layer monitors whether the control data reaches the preset target. By monitoring whether the control target is reached, the degree of complexity of the operating conditions is determined. If the control target is not reached, the electrolytic cell performance is abnormal, and the fault warning system is triggered. According to the fault handling methods at different levels, the electrolytic cell operation fault problem is resolved. The intelligent analysis layer analyzes the data from the monitoring layer and the data from multiple databases on the host computer to determine whether there is an anomaly in the status, what type of fault should be reported if there is an anomaly, and then quickly resolves the abnormal problems that occur during the operation of the electrolytic cell. Based on the output of the intelligent analysis layer (i.e., the data analysis report determined by the analysis layer), fault warning and health prediction are performed through mechanism modeling, data-driven methods and scenario verification methods.

[0035] Specifically, when using the mechanistic model method for fault warning and health prediction, fault warning and health prediction are based on the voltage change mechanism of the electrolyzer during electrochemical application. In the electrochemical mechanism of the battery cell, due to the scouring of reactants and the shedding of catalysts, the cell voltage gradually increases with the length of the operating time. The trend and rate of increase of the cell voltage are obtained through experimental data to establish a mechanistic model, judge the performance, fault status and health of the electrolyzer at each stage. When using data-driven methods for fault warning and health prediction, the data-driven method utilizes operating condition control to evaluate the performance of the electrolyzer. A typical data-driven method is the operating condition sensitivity data-driven method. Under preset operating conditions, the solution control temperature, flow rate, and pressure of the electrolyzer are adjusted by data control. The changes in voltage performance and current efficiency of the electrolyzer under these operating conditions are monitored. By comparing efficiency data, the fault status and health status of the electrolyzer are obtained. Data-driven methods are beneficial for obtaining the optimal operating conditions and the optimal operating efficiency, and effectively evaluating the health of the electrolyzer. If no corresponding performance change results are obtained for changes in different sensitive conditions, it is considered that the electrolyzer is in a fault state or a warning state. When using scenario verification for fault warning and health prediction, the warning and health prediction are combined with different application scenarios of the electrolytic cell. In a typical power supply fluctuation scenario, it is necessary to monitor the fault characteristics of the electrolytic cell caused by power supply fluctuation in order to obtain fault information as soon as possible. At the same time, for power supply fluctuation scenarios or frequent start-stops caused by power supply fluctuation scenarios, health evaluation and prediction are carried out to obtain the operating status of the electrolytic cell.

[0036] Furthermore, to improve the control robustness of the integrated electrolytic cell device, the following design is proposed. Figure 8 The control logic architecture of the ODC-IEM electrolyzer system shown is based on a multi-factor influence model. It achieves real-time online monitoring of each component of the electrolyzer system through sensors arranged in the electrolyzer system. At the bottom layer of the control software algorithm, it performs intelligent analysis and processing of the operating data model. In actual working scenarios, based on mechanism model algorithm, data-driven adaptive algorithm and fixed scenario algorithm, it finally realizes fault early warning and health prediction control of the electrolyzer.

[0037] Furthermore, regarding the control logic of the electrolytic cell, it is designed according to the actual working conditions of the electrolytic cell as follows: Figure 9 and Figure 10 The fault diagnosis timing diagram of the ODC-IEM electrolyzer shown is based on the operation scenario. The entire working state control of the electrolyzer is carried out according to the logic of standby, auxiliary system start-up, supply of materials required for reaction, stable operation, load reduction and shutdown operation, shutdown timing control, emergency state handling, short-term shutdown, cyclic start-up and long-term fault shutdown, so as to achieve stable control of the ODC-IEM electrolyzer.

[0038] In one or more specific embodiments, the ODC-IEM electrolytic cell integrated device and control method provided by the present invention have the following technical effects: 1. The electrolytic cell integrated device provided by the present invention adopts a single-module configuration with functional zoning, modular structure, and digital processing. By dividing the various chambers into multiple independent and sealed series chambers through functional zoning, the processing difficulty problem is solved. The structural modules of each electrode plate and chamber are universalized. By reasonably matching multiple sets of non-shaped organic corrosion-resistant material sealing rings with sealing grooves, a sealing solution for multiple independent chambers is achieved, solving the problem of frequent gas and liquid leakage in the solution chamber, gas chamber and alkali chamber. 2. The electrolytic cell integrated device provided by the present invention has a simple and reasonable single-cell multi-chamber sealing structure, high reliability, and high ease of conversion and assembly. It can be used repeatedly without damage and can be recycled, solving the problem of single use, the problem of poor recyclability after repeated disassembly and assembly, and the problem of high difficulty in commercial mass production and assembly. 3. The electrolytic cell integrated device provided by the present invention adopts a stacked structure of multiple individual electrolytic reaction units connected in series with fluid channels, which solves the problem of inconsistent electrical performance caused by poor distribution consistency, achieves low average electrical performance, and solves problems such as high electrolysis power consumption and low efficiency. 4. The electrolytic cell integrated device provided by the present invention has good robustness in its control logic, improves the fault diagnosis and failure self-repair algorithm of the electrolytic cell, improves the self-repair algorithm and capability of the electrolytic cell's own control parameters, and achieves the goal of improving the electrolytic cell's fault self-diagnosis and health early warning.

[0039] In summary, the electrolytic cell integrated device provided by this invention significantly improves operational reliability while drastically reducing the voltage of the electrolytic cell. The single electrolytic cell module operates stably, and multiple electrolytic cell modules stacked together operate stably without gas, liquid, or alkali leakage. The continuous, stable, and reliable operation time of the electrolytic cell is doubled. The ease of mass production and assembly of the electrolytic cell is improved, which is beneficial for improving the production, manufacturing, and mass delivery operation of large-scale commercial electrolytic cells, bringing significant benefits to the production efficiency and power consumption reduction of the chlor-alkali industry. Various performance characteristics of the electrolytic cell are improved, its adaptability to operating conditions and operational intensity are enhanced, and the operating pressure meets the 150 kPa·a operating condition. The sealing process is significantly improved. The robustness and redundancy of the electrolytic cell control are improved, the control logic is clear, and data control at each stage of the electrolytic cell operation process—start-up, loading, running, unloading, shutdown, and cyclic start-up—is monitored.

[0040] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An integrated device for an ODC-IEM electrolytic cell, characterized in that, include: Multiple electrolytic cell modules, each including an anode chamber, an alkali chamber, and an oxygen chamber, wherein the anode chamber has a salt solution inlet, a salt solution outlet, and a chlorine outlet; the alkali chamber has a water inlet and an alkali solution outlet; and the oxygen chamber has an oxygen inlet and an oxygen outlet. The controller is used to adjust the working mode of the ODC-IEM electrolytic cell integrated device according to the stored control logic, and to handle the faults of the ODC-IEM electrolytic cell integrated device according to the stored fault loop logic. The anode and cathode fluid paths of each of the electrolytic cell modules are connected in parallel, wherein: The salt solution inlet pipeline is connected in parallel to the salt solution inlet pipeline of the anode chamber of each of the electrolytic cells; The chlorine outlet pipeline is connected in parallel to the chlorine outlet of the anode chamber of each of the electrolytic cell modules. The concentrated alkali outlet pipeline is connected in parallel to the alkali solution outlet of the alkali solution chamber of each of the electrolytic cell modules. The oxygen inlet pipeline is connected in parallel to the oxygen inlet of the oxygen chamber of each electrolytic cell module; The water inlet pipe is connected in parallel to the water inlet of the alkali chamber of each electrolytic cell module; The salt solution outlet pipeline is connected in parallel to the salt solution outlet pipeline of the anode chamber of each of the electrolytic cell modules.

2. The ODC-IEM electrolytic cell integrated device according to claim 1, characterized in that, Every N electrolytic cell modules are electrically connected in series to form a module, and adjacent modules are clamped and fixed together by a mechanical structure, where N is a positive integer greater than or equal to 2.

3. The ODC-IEM electrolytic cell integrated device according to claim 2, characterized in that, The oxygen chamber and the cathode ODC are sealed and pressed together by a bonding process.

4. The ODC-IEM electrolytic cell integrated device according to claim 2, characterized in that, The electrolytic cell module also includes a cathode chamber diffusion electrode sealing ring and an alkali solution chamber sealing ring; The cathode chamber diffusion electrode sealing ring is disposed between the cathode ODC and the alkali solution chamber, and a sealing ring is disposed on one side of the alkali solution chamber. The cathode chamber diffusion electrode sealing ring and the sealing ring cooperate to seal. The alkaline solution chamber sealing ring is disposed between the ion exchange membrane and the alkaline solution chamber, and an alkaline solution chamber sealing groove is provided on the other side of the alkaline solution chamber, and the alkaline solution chamber sealing ring cooperates with the sealing groove to seal.

5. The ODC-IEM electrolytic cell integrated device according to claim 2, characterized in that, The electrolytic cell module also includes a sealing ring; The sealing ring is disposed between the anode chamber and the anode electrode frame. An anode chamber sealing groove is provided on one side of the anode chamber, and the sealing ring cooperates with the anode chamber sealing groove to seal.

6. The ODC-IEM electrolytic cell integrated device according to any one of claims 1-5, characterized in that, The anode chamber has a salt solution inlet, a salt solution outlet, and a chlorine gas outlet; the alkali solution chamber has a water inlet and an alkali solution outlet; and the oxygen chamber has an oxygen inlet and an oxygen outlet, both equipped with quick-connect fittings.

7. The ODC-IEM electrolytic cell integrated device according to any one of claims 1-5, characterized in that, The anode chamber is equipped with multiple vapor-liquid separation baffles at the chlorine outlet.

8. A control method, based on the ODC-IEM electrolytic cell integrated device as described in claim 1, characterized in that, The method includes: The operating mode of the ODC-IEM electrolytic cell integrated device is adjusted according to the stored control logic.

9. The control method according to claim 8, characterized in that, The method further includes: Collect multidimensional operational data of the electrolytic cell; The multidimensional operating data is transmitted to the real-time monitoring layer. The real-time monitoring layer compares the data deviations in real time to determine the trend of electrolytic cell performance changes. The real-time monitoring layer monitors whether the control data reaches the preset target. By monitoring whether the control target is reached, the degree of complexity of the operating conditions is determined. If the control target is not reached, the electrolytic cell performance is abnormal, and the fault warning system is triggered. According to the fault handling methods at different levels, the electrolytic cell operation fault problem is resolved. The intelligent analysis layer analyzes the data from the monitoring layer and the data from multiple databases on the host computer to determine whether there is an anomaly in the status, what type of fault should be reported if there is an anomaly, and then quickly resolves the abnormal problems that occur during the operation of the electrolytic cell. Based on the output of the intelligent analysis layer, fault warning and health prediction are performed using the mechanism model method, data-driven method, and scenario verification method.

10. The control method according to claim 9, characterized in that, When using the mechanistic model method for fault warning and health prediction, the fault warning and health prediction are based on the voltage change mechanism of the electrolyzer during the electrochemical application process. In the electrochemical mechanism of the cell, due to the scouring of reactants and the shedding of catalysts, the cell voltage gradually increases with the length of the operating time. The trend and rate of increase of the cell voltage are obtained through experimental data to establish a mechanistic model, judge the performance, fault status and health of the electrolyzer at each stage. When using data-driven methods for fault warning and health prediction, the data-driven method utilizes operating condition control to evaluate the performance of the electrolyzer. A typical data-driven method is the operating condition sensitivity data-driven method. Under preset operating conditions, the solution control temperature, flow rate, and pressure of the electrolyzer are adjusted by data control. The changes in voltage performance and current efficiency of the electrolyzer under these operating conditions are monitored. By comparing efficiency data, the fault status and health status of the electrolyzer are obtained. Data-driven methods are beneficial for obtaining the optimal operating conditions and the optimal operating efficiency, and effectively evaluating the health of the electrolyzer. If no corresponding performance change results are obtained for changes in different sensitive conditions, it is considered that the electrolyzer is in a fault state or a warning state. When using scenario verification for fault warning and health prediction, the warning and health prediction are combined with different application scenarios of the electrolytic cell. In a typical power supply fluctuation scenario, it is necessary to monitor the fault characteristics of the electrolytic cell caused by power supply fluctuation in order to obtain fault information as soon as possible. At the same time, for power supply fluctuation scenarios or frequent start-stops caused by power supply fluctuation scenarios, health evaluation and prediction are carried out to obtain the operating status of the electrolytic cell.

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