Electrolytic bath testing device

Abstract

The utility model provides an electrolytic bath testing device. The device comprises a gas source supply module, a gas source distributor, a central storage tank, a distribution pump, a plurality of electrolytic bath testing modules, a multi-port selector valve and a gas chromatograph, the air source supply module is connected with the air source distributor; the gas source distributor is connected with each electrolytic cell test module through a gas source pipeline, and each valve in the gas source distributor corresponds to one gas source pipeline; the central storage tank is connected with the distribution pump; the distribution pump is connected with each electrolytic cell test module through an electrolyte pipeline, and each valve in the distribution pump corresponds to one electrolyte pipeline; and the gas chromatograph is in pipeline connection with each electrolytic cell test module through a corresponding valve of the multi-port selector valve. According to the device, a plurality of electrolytic cell test modules can be tested in parallel through the gas source distributor, the distribution pump and the multi-port selector valve, so that the test efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of new energy technology, and more specifically, to an electrolytic cell testing device. Background Technology

[0002] With the rapid development of the hydrogen energy industry, alkaline water electrolysis hydrogen production technology has become the mainstream solution for renewable energy hydrogen production due to its advantages such as low cost, long life, no need for precious metal catalysts, and suitability for large-scale hydrogen production scenarios. The large-scale application of electrolyzers requires more efficient and reliable testing systems to verify their performance parameters.

[0003] Existing alkaline electrolytic cell testing systems typically employ a single testing branch, resulting in low testing efficiency. Utility Model Content

[0004] In view of this, the purpose of this application is to provide an electrolytic cell testing device that can perform parallel testing of multiple electrolytic cell testing modules through a gas source distributor, a distribution pump and a multi-port selection valve, thereby improving testing efficiency.

[0005] In a first aspect, embodiments of this application provide an electrolytic cell testing device, the device comprising: a gas supply module, a gas distributor, a central storage tank, a distribution pump, multiple electrolytic cell testing modules, a multi-port selection valve, and a gas chromatograph;

[0006] The gas supply module is connected to the gas distributor; the gas distributor is connected to each electrolytic cell test module via a gas supply pipeline, and each valve in the gas distributor corresponds to a gas supply pipeline; the central storage tank is connected to the distribution pump; the distribution pump is connected to each electrolytic cell test module via an electrolyte pipeline, and each valve in the distribution pump corresponds to an electrolyte pipeline.

[0007] The gas chromatograph and each electrolytic cell test module are connected by a pipeline through a corresponding valve of the multi-port selector valve.

[0008] In one possible real-time configuration, the device further includes: a flow indication controller;

[0009] One end of the flow indicator controller is connected to the connecting pipe between the gas supply module and the gas distributor; the other end of the flow indicator controller is connected to the gas distributor.

[0010] In one possible real-time mode, any electrolytic cell test module includes: at least one electrolytic cell test unit, a cathode waste liquid tank and an anode waste liquid tank;

[0011] The gas source distributor is connected to each electrolytic cell test unit via a gas source pipeline; the distribution pump is connected to each electrolytic cell test unit via an electrolyte pipeline.

[0012] The anode waste liquid tank is connected to the anode waste liquid outlet of each electrolytic cell test unit via an anode waste liquid pipeline; the cathode waste liquid tank is connected to the cathode waste liquid outlet of each electrolytic cell test unit via a cathode waste liquid pipeline.

[0013] The gas chromatograph and each electrolytic cell test unit are connected by a pipeline through a corresponding valve of the multi-port selector valve.

[0014] In one possible real-time configuration, any electrolytic cell test unit includes an electrolytic cell, an anode supply tank, an anode phase separator, an anode nitrogen actuator, an anode waste liquid flow valve, a cathode supply tank, a cathode phase separator, a cathode nitrogen actuator, and a cathode waste liquid flow valve; the gas source distributor is connected to the anode inlet of the electrolytic cell via a gas source pipeline; the distribution pump is connected to the first electrolyte inlet of each anode supply tank and the first electrolyte inlet of each cathode supply tank via electrolyte pipelines.

[0015] The electrolyte outlet of the anode supply tank is connected to the anode inlet of the electrolytic cell via a pipeline; the anode outlet of the electrolytic cell is connected to the inlet of the anode phase separator via a pipeline; the gas outlet of the anode phase separator is connected to the inlet of the anode nitrogen actuator via a pipeline; the liquid outlet of the anode phase separator, the anode waste liquid tank, and the second electrolyte inlet of the anode supply tank are each connected to a corresponding valve of the anode waste liquid flow valve via a pipeline; the gas chromatograph is connected to the outlet of the anode nitrogen actuator via a corresponding valve of the multi-port selector valve.

[0016] The electrolyte outlet of the cathode supply tank is connected to the cathode inlet of the electrolytic cell via a pipeline; the cathode outlet of the electrolytic cell is connected to the inlet of the cathode phase separator via a pipeline; the gas outlet of the cathode phase separator is connected to the inlet of the cathode nitrogen actuator via a pipeline; the liquid outlet of the cathode phase separator, the cathode waste liquid tank, and the second electrolyte inlet of the cathode supply tank are each connected to a corresponding valve of the cathode waste liquid flow valve via a pipeline; the gas chromatograph is connected to the outlet of the cathode nitrogen actuator via a corresponding valve of the multi-port selector valve.

[0017] In one possible real-time configuration, the electrolytic cell testing unit further includes: an anode diaphragm pump, an anode heat exchanger, an anode temperature indicator controller, a cathode diaphragm pump, a cathode heat exchanger, and a cathode temperature indicator controller.

[0018] The electrolyte inlet of the anode supply tank is connected to the electrolyte inlet of the anode diaphragm pump via a pipeline; the electrolyte outlet of the anode diaphragm pump is connected to the electrolyte inlet of the anode heat exchanger via a pipeline; the electrolyte outlet of the anode heat exchanger is connected to the anode inlet of the electrolytic cell via a pipeline; and the anode temperature indicator controller is connected to the anode heat exchanger.

[0019] The electrolyte inlet of the cathode supply tank is connected to the electrolyte inlet of the cathode diaphragm pump via a pipe; the electrolyte outlet of the cathode diaphragm pump is connected to the electrolyte inlet of the cathode heat exchanger via a pipe; the electrolyte outlet of the cathode heat exchanger is connected to the cathode inlet of the electrolytic cell via a pipe; and the cathode temperature indicator controller is connected to the cathode heat exchanger.

[0020] In one possible real-time mode, the electrolytic cell testing unit further includes a humidifier;

[0021] The gas source distributor is connected to the electrolyte inlet of the humidifier via a gas source pipe; the electrolyte outlet of the humidifier is connected to the anode inlet of the electrolytic cell via a pipe.

[0022] In one possible real-time mode, the electrolytic cell testing unit further includes: an anode nitrogen purging valve and a cathode nitrogen purging valve;

[0023] The anode nitrogen purging valve is connected to the connecting pipe between the anode diaphragm pump and the anode heat exchanger via a pipeline; the cathode nitrogen purging valve is connected to the connecting pipe between the cathode diaphragm pump and the cathode heat exchanger via a pipeline.

[0024] In one possible real-time mode, the electrolytic cell testing unit further includes: an anode conductivity sensor and a cathode conductivity sensor;

[0025] The anode conductivity sensor is connected to the connecting pipe between the anode waste liquid flow valve and the anode supply tank; the cathode conductivity sensor is connected to the connecting pipe between the cathode waste liquid flow valve and the cathode supply tank.

[0026] In one possible real-time mode, the electrolytic cell testing module further includes: a heating furnace;

[0027] The heating furnace heats the outer shell of the electrolytic cell in each electrolytic cell test unit.

[0028] In one possible real-time mode, the device further includes a power supply module, and each electrolytic cell test module also includes a multi-channel potentiostat.

[0029] The power supply module is connected to each electrolytic cell test unit in each electrolytic cell test module through a corresponding channel of the multi-channel potentiostat in each electrolytic cell test module.

[0030] This utility model provides an electrolytic cell testing device, which includes: a gas supply module, a gas distributor, a central storage tank, a distribution pump, multiple electrolytic cell testing modules, a multi-port selector valve, and a gas chromatograph. The gas supply module and the gas distributor are connected; the gas distributor is connected to each electrolytic cell testing module via a gas supply pipeline, and each valve in the gas distributor corresponds to one gas supply pipeline; the central storage tank and the distribution pump are connected; the distribution pump is connected to each electrolytic cell testing module via an electrolyte pipeline, and each valve in the distribution pump corresponds to one electrolyte pipeline; the gas chromatograph is connected to each electrolytic cell testing module via a corresponding valve of the multi-port selector valve. This device enables parallel testing of multiple electrolytic cell testing modules through the gas distributor, distribution pump, and multi-port selector valve, improving testing efficiency. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This illustration shows a structural schematic diagram of an electrolytic cell testing device provided in an embodiment of this application;

[0033] Figure 2 This invention provides a schematic diagram of the structure of another electrolytic cell testing device according to an embodiment of the present application.

[0034] Figure 3 A schematic diagram of the structure of the electrolytic cell testing module provided in an embodiment of this application is shown;

[0035] Figure 4 A schematic diagram of the structure of the electrolytic cell test unit provided in an embodiment of this application is shown. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0038] In the description of this utility model, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first" and "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] To enable those skilled in the art to utilize the content of this application, and in conjunction with the specific application scenario of "new energy technology," the following embodiments are provided. For those skilled in the art, the general principles defined herein can be applied to other embodiments and application scenarios without departing from the spirit and scope of this application. Although this application is primarily described within the "new energy technology field," it should be understood that this is merely an exemplary embodiment.

[0041] It should be noted that the term "comprising" will be used in the embodiments of this application to indicate the presence of the features declared thereafter, but does not exclude the addition of other features.

[0042] The following is a detailed description of an electrolytic cell testing device provided in the embodiments of this application.

[0043] Reference Figure 1 The diagram shown is a structural schematic of an electrolytic cell testing device provided in an embodiment of this application. The device includes: a gas supply module 101, a gas distributor 102, a central storage tank 103, a distribution pump 104, multiple electrolytic cell testing modules 105, a multi-port selection valve 106, and a gas chromatograph 107.

[0044] The system includes a gas supply module 101 and a gas distributor 102. The gas distributor 102 is connected to each electrolytic cell test module 105 via a gas supply pipeline, and each valve in the gas distributor 102 corresponds to one gas supply pipeline. A central storage tank 103 is connected to a distribution pump 104. The distribution pump 104 is connected to each electrolytic cell test module 105 via an electrolyte pipeline, and each valve in the distribution pump 104 corresponds to one electrolyte pipeline. A gas chromatograph 107 is connected to each electrolytic cell test module 105 via a corresponding valve in a multi-port selection valve 106. There is a one-to-one correspondence between the gas supply pipelines and the valves in the gas distributor 102; a one-to-one correspondence between the electrolyte pipelines and the valves in the distribution pump 104; and a one-to-one correspondence between the electrolytic cell test module 105 and the valves in the multi-port selection valve 106.

[0045] In one possible implementation, the gas supply module 101 supplies carbon dioxide (CO2) to the gas distributor 102. The gas distributor 102 supplies CO2 to the corresponding electrolyzer test module 105 through an internally opened valve. The central storage tank 103 supplies electrolyte to the distribution pump 104. The distribution pump 104 supplies electrolyte to the corresponding electrolyzer test module 105 through an internally opened valve. The electrolyzer test module 105 produces hydrogen based on the input CO2 and electrolyte. The electrolyzer test module 105 supplies hydrogen to a multi-port selection valve 106. The multi-port selection valve 106 supplies hydrogen to a gas chromatograph 107 through an internally selected valve, while unselected valves vent the hydrogen. The internally selected valves are those whose outlets are adjusted to connect to the gas chromatograph 107; while the unselected valves are those whose outlets are adjusted to lead to the vent outlet.

[0046] Here, this application achieves parallel testing of multiple electrolytic cell test modules by opening the valves corresponding to multiple electrolytic cell test modules 105 inside the gas source distributor to supply CO2 gas to multiple electrolytic cell test modules 105, by opening the valves corresponding to multiple electrolytic cell test modules 105 inside the distribution pump to supply electrolyte to multiple electrolytic cell test modules 105, and by opening the valve corresponding to a certain electrolytic cell test module 105 in the multi-port selection valve to supply hydrogen gas generated by multiple electrolytic cell test modules 105 to the gas chromatograph 107.

[0047] The valves inside the distribution pump 104 can be opened via a central controller or manually. The outlet of the valve in the multi-port selector valve 106 can be adjusted via a central controller or manually.

[0048] Here, the gas flow rate of each electrolytic cell test module 105 can be dynamically allocated through the gas source distributor 102. The electrolyte can be dynamically allocated to each electrolytic cell test module 105 through the distribution pump 104. The gas chromatograph 107 achieves efficient sample separation based on the retention time differences of different gas components in the chromatographic column. The multi-port selection valve 106 sequentially polls the gas products of each electrolytic cell in the electrolytic cell test module 105 at a fixed period, ensuring that the gas product data of each electrolytic cell are aligned according to the time window, with each cell occupying an independent analysis window to avoid cross-contamination. Assuming that the online gas chromatograph performs a measurement every 8 minutes, the measurement frequency of each electrolytic cell in the 16-electrolytic cell test system is approximately 2 hours. Therefore, the gas source distributor, distribution pump, and multi-port selection valve enable parallel testing of multiple electrolytic cell test modules, improving testing efficiency.

[0049] Furthermore, referring to Figure 2 The diagram shown is a structural schematic of another electrolytic cell testing device provided in an embodiment of this application. The device further includes a flow indicator controller 201.

[0050] One end of the flow indicator controller 201 is connected to the connecting pipe between the gas supply module 101 and the gas distributor 102; the other end of the flow indicator controller 201 is connected to the gas distributor 102.

[0051] Here, the flow indicator controller 201 can monitor the gas source flow rate in real time and close the internal valve of the gas source distributor 102 when the gas source flow rate reaches the preset flow rate. Therefore, through the cooperation between the flow indicator controller 201 and the gas source distributor 102, the gas source can be distributed to each electrolytic cell test module 105 through multiple gas source pipelines according to the preset ratio, flow rate and pressure requirements.

[0052] Furthermore, referring to Figure 3 The diagram shown is a structural schematic of the electrolytic cell testing module provided in the embodiment of this application. The electrolytic cell testing module 105 includes: at least one electrolytic cell testing unit 301, a cathode waste liquid tank 302, and an anode waste liquid tank 303.

[0053] The gas source distributor 102 is connected to each electrolytic cell test unit 301 via a gas source pipeline; the distribution pump 104 is connected to each electrolytic cell test unit 301 via an electrolyte pipeline; the anode waste liquid tank 302 is connected to the anode waste liquid outlet of each electrolytic cell test unit 301 via an anode waste liquid pipeline; the cathode waste liquid tank 302 is connected to the cathode waste liquid outlet of each electrolytic cell test unit 301 via a cathode waste liquid pipeline; and the gas chromatograph 107 is connected to each electrolytic cell test unit 301 via a corresponding valve of the multi-port selection valve 106.

[0054] Here, the gas distributor 102 delivers CO2 to the corresponding electrolyzer test unit 301 through an internally opened valve. The central storage tank 103 delivers electrolyte to the distribution pump 104. The distribution pump 104, through its internally opened valve, delivers the electrolyte to the corresponding electrolyzer test unit 301. The electrolyzer test unit 301 produces hydrogen based on the input CO2 and electrolyte. The electrolyzer test unit 301 delivers hydrogen to the multi-port selection valve 106. The multi-port selection valve 106, through its internally selected valve, delivers hydrogen to the gas chromatograph 107; unselected valves vent the hydrogen, preventing pressure fluctuations in the electrolyzer test unit 301. The gas chromatograph performs online qualitative and quantitative analysis of the gas components.

[0055] Among them, the internal selected valves are those whose outlets are adjusted to connect to the gas chromatograph 107; while the unselected valves are those whose outlets are adjusted to lead to the vent outlet.

[0056] The electrolytic cell testing module also includes a heating furnace; the heating furnace heats the outer shell of the electrolytic cell in each testing unit. Uniform temperature is beneficial for improving system reaction efficiency and current efficiency, extending equipment life, and increasing product purity. To achieve optimal temperature control, each electrolytic cell reaction stand is equipped with a heating furnace to heat the electrolytic cell shell, connectors, and supply pipelines to a preset temperature. Uniform reaction temperature is ensured through dual regulation of electrolyte preheating (heat exchanger) and electrolytic cell shell heating (heating furnace). If the temperature exceeds the limit, the heating power is automatically reduced or the electrolytic cell operation is suspended.

[0057] It should be noted that this device can support testing of 16 laboratory-scale electrolytic cells. These electrolytic cells operate within electrolytic cell test modules, each supporting four cells. They are distributed across four independent electrolytic cell reaction stands, allowing for parallel operation. Different process parameters can be set in each electrolytic cell test module.

[0058] Furthermore, the electrolytic cell testing unit includes an electrolytic cell, an anode supply tank, an anode phase separator, an anode nitrogen actuator, an anode waste liquid flow valve, a cathode supply tank, a cathode phase separator, a cathode nitrogen actuator, and a cathode waste liquid flow valve; the gas source distributor is connected to the anode inlet of the electrolytic cell via a gas source pipeline; the distribution pump is connected to the first electrolyte inlet of each anode supply tank and the first electrolyte inlet of each cathode supply tank via electrolyte pipelines.

[0059] The electrolyte outlet of the anode supply tank is connected to the anode inlet of the electrolytic cell via a pipeline; the anode outlet of the electrolytic cell is connected to the inlet of the anode phase separator via a pipeline; the gas outlet of the anode phase separator is connected to the inlet of the anode nitrogen actuator via a pipeline; the liquid outlet of the anode phase separator, the anode waste liquid tank, and the second electrolyte inlet of the anode supply tank are each connected to a corresponding valve of the anode waste liquid flow valve via a pipeline; the gas chromatograph is connected to the outlet of the anode nitrogen actuator via a corresponding valve of the multi-port selector valve via a pipeline.

[0060] Here, the anode waste liquid outlet of the electrolytic cell test unit 301 is the liquid outlet of the anode phase separator.

[0061] The electrolyte outlet of the cathode supply tank is connected to the cathode inlet of the electrolytic cell via a pipeline; the cathode outlet of the electrolytic cell is connected to the inlet of the cathode phase separator via a pipeline; the gas outlet of the cathode phase separator is connected to the inlet of the cathode nitrogen actuator via a pipeline; the liquid outlet of the cathode phase separator, the cathode waste liquid tank, and the second electrolyte inlet of the cathode supply tank are each connected to a corresponding valve of the cathode waste liquid flow valve via a pipeline; the gas chromatograph is connected to the outlet of the cathode nitrogen actuator via a corresponding valve of the multi-port selector valve via a pipeline.

[0062] Here, the cathode waste liquid outlet of the electrolytic cell test unit 301 is the liquid outlet of the cathode phase separator.

[0063] Furthermore, the electrolytic cell testing unit also includes an anode diaphragm pump, an anode heat exchanger, an anode temperature indicator controller, a cathode diaphragm pump, a cathode heat exchanger, and a cathode temperature indicator controller; the electrolyte inlet of the anode supply tank and the electrolyte inlet of the anode diaphragm pump are connected by a pipeline; the electrolyte outlet of the anode diaphragm pump and the electrolyte inlet of the anode heat exchanger are connected by a pipeline; the electrolyte outlet of the anode heat exchanger and the anode inlet of the electrolytic cell are connected by a pipeline; the anode temperature indicator controller is connected to the anode heat exchanger; the electrolyte inlet of the cathode supply tank and the electrolyte inlet of the cathode diaphragm pump are connected by a pipeline; the electrolyte outlet of the cathode diaphragm pump and the electrolyte inlet of the cathode heat exchanger are connected by a pipeline; the electrolyte outlet of the cathode heat exchanger and the cathode inlet of the electrolytic cell are connected by a pipeline; the cathode temperature indicator controller is connected to the cathode heat exchanger.

[0064] Furthermore, the electrolytic cell testing unit also includes a humidifier; the gas source distributor is connected to the electrolyte inlet of the humidifier via a gas source pipe; and the electrolyte outlet of the humidifier is connected to the anode inlet of the electrolytic cell via a pipe.

[0065] Furthermore, the electrolytic cell testing unit also includes: an anode nitrogen purging valve and a cathode nitrogen purging valve; the anode nitrogen purging valve is connected to the connecting pipe between the anode diaphragm pump and the anode heat exchanger via a pipeline; the cathode nitrogen purging valve is connected to the connecting pipe between the cathode diaphragm pump and the cathode heat exchanger via a pipeline.

[0066] Furthermore, the electrolytic cell testing unit also includes: an anode conductivity sensor and a cathode conductivity sensor; the anode conductivity sensor is connected to the connecting pipe between the anode waste liquid flow valve and the anode supply tank; the cathode conductivity sensor is connected to the connecting pipe between the cathode waste liquid flow valve and the cathode supply tank.

[0067] Reference Figure 4 The diagram shown is a structural schematic of the electrolytic cell testing unit provided in an embodiment of this application. The testing process is described below based on this structural schematic of the electrolytic cell testing unit:

[0068] First, the humidifier 416 humidifies the CO2 supplied by the gas distributor 102, and the humidified CO2 flows into the anode of the electrolytic cell 401. The distribution pump 104 supplies electrolyte to the anode supply tank 402 and the cathode supply tank 406. During operation, the electrolyte in the anode supply tank 402 flows sequentially through the anode diaphragm pump 410 and the anode heat exchanger 411 before flowing into the anode of the electrolytic cell 401 for oxidation. The electrolyte in the cathode supply tank 406 flows sequentially through the cathode diaphragm pump 413 and the cathode heat exchanger 414 before flowing into the cathode of the electrolytic cell 401 for reduction.

[0069] Here, the humidifier 416 can adjust the humidity according to the reaction type, allowing CO2 to pass through a water-saturated or controlled-humidity environment to maintain high conductivity and electrolysis efficiency for subsequent reactions. After humidification, the CO2 enters the gas diffusion electrode inlet (anode) of the electrolytic cell. The gas flow rate is matched to the electrolyte flow rate to ensure uniform distribution of the gas and liquid phases within the electrolytic cell, meeting the gas requirements of different electrolytic cell test units. The distribution pump 104 delivers electrolyte to the anode / cathode supply tanks via independent pipelines, replenishing the electrolyte in each anode / cathode supply tank. Each electrolytic cell has independent anode and cathode supply tanks, continuously supplying electrolyte to the electrolytic cell reaction chamber during the electrolysis reaction stage to maintain the electrochemical reaction. Operators do not need to contact the electrolyte during the entire testing system operation.

[0070] Furthermore, the anode diaphragm pump 410 and cathode diaphragm pump 413 drive liquid flow through the reciprocating motion of the flexible diaphragm, achieving a specific flow rate within the range of 1-100 mL / min to maintain uniform electrolyte flow and avoid local concentration differences. The anode heat exchanger 411 and cathode heat exchanger 414 heat the electrolyte to the target temperature (20-80°C) via a heat medium (electric heating). The anode temperature indicator controller 412 and cathode temperature indicator controller 415 monitor, control, and regulate the temperature, automatically adjusting the operating status of the anode heat exchanger 411 and cathode heat exchanger 414 based on real-time temperature changes to maintain the required temperature stability. The heat exchangers and temperature indicator controllers (TICs) work collaboratively through closed-loop feedback control to achieve precise temperature regulation.

[0071] Then, the gas-liquid mixture flowing out from the anode of electrolytic cell 401 after the oxidation reaction flows into the anode phase separator 403 for separation. During operation, nitrogen is continuously supplied to the anode nitrogen pusher 404. When the separated gas passes through the anode nitrogen pusher 404, nitrogen is used as the carrier gas, and the separated gas is pushed to the multi-port selector valve 106 at a process pressure of 0-2 barg. The gas-liquid mixture flowing out from the cathode of electrolytic cell 401 after the reduction reaction flows into the cathode phase separator 407 for separation. During operation, nitrogen is continuously supplied to the cathode nitrogen pusher 408. When the separated gas passes through the cathode nitrogen pusher 408, nitrogen is used as the carrier gas, and the separated gas is pushed to the multi-port selector valve 106 at a process pressure of 0-2 barg. When the liquid level in the anode phase separator 403 or the cathode phase separator 407 exceeds the threshold, the separated liquid is input into the waste liquid tank (anode waste liquid tank 303 or cathode waste liquid tank 302) or the supply tank (anode supply tank 402 or cathode supply tank 406) through the anode waste liquid flow valve 405 or the cathode waste liquid flow valve 409; if an abnormal pH is detected, a neutralizing agent needs to be added.

[0072] Here, the phase separator uses membrane separation technology to separate the gas and liquid phases, ensuring that only the target phase (such as the gas phase) enters the gas chromatograph, avoiding liquid contamination of the column. After separation, the heavier phase (liquid phase) is discharged from the bottom, and the lighter phase (gas phase) is discharged from the top. Furthermore, the carrier gas itself does not participate in the separation reaction; it only provides the transport power.

[0073] In addition, the device features two flow modes. In single-pass mode, the electrolyte flows through the electrolytic cell and undergoes gas-phase separation before being disposed of in a waste tank for subsequent unified discharge and treatment. A central storage tank replenishes the electrolyte to maintain the balance of the testing device, making it suitable for rapid screening experiments. In circulation mode, the electrolyte flows back to the supply tank after electrolytic cell and gas-phase separation, achieving electrolyte recycling, which is suitable for long-term stability testing.

[0074] Finally, after the reaction in the electrolytic cell test unit 301 is complete, the anode nitrogen purge valve 417 and the cathode nitrogen purge valve 418 are opened to introduce high-purity nitrogen into the electrolytic cell test unit 301, replacing the air or other gases in the system and expelling any residual electrolyte. This maintains an inert atmosphere in the electrolytic cell test unit 301, preventing the formation of an explosive environment and avoiding interference from impurities in the electrolysis reaction.

[0075] During operation, the anode conductivity sensor 419 and the cathode conductivity sensor 420 monitor the electrolyte in the circulating loop in real time. When the electrolyte conductivity is lower than the preset threshold, new electrolyte can be added to the supply tank from the central storage tank 103 or remixed via the central controller or manual operation to dynamically maintain the optimal working state of the electrolyte concentration.

[0076] Furthermore, the electrolytic cell testing unit also includes an automatic sampler, which is connected to the sampling outlet of the anode phase separator 403 and the sampling outlet of the cathode phase separator 407. After phase separation, the automatic sampler automatically performs liquid sampling for subsequent liquid product purity and composition analysis.

[0077] In addition, to prevent metal ion contamination caused by chemical corrosion of steel components in the electrolyte flow path, all system components that come into contact with the electrolyte (such as pipes, valves, sensors, etc.) are made of inert polymer materials.

[0078] The device also includes a power supply module, and each electrolytic cell test module 105 includes a multi-channel potentiostat. The power supply module is connected to each electrolytic cell test unit in each electrolytic cell test module through a corresponding channel of the multi-channel potentiostat in each electrolytic cell test module.

[0079] The power module converts the alternating current (AC) input from the external power grid into the high-power direct current (DC) required for the electrolysis process, providing a stable power input to the test modules 105 of each electrolytic cell in the unit. It integrates overvoltage, overcurrent, short-circuit, and overheat protection to prevent damage to the equipment or electrolytic cells. Each electrolytic cell test module 105 is equipped with a multi-channel potentiostat. Each of the four channels of the multi-channel potentiostat is equipped with a dual potentiostat module and an electrochemical impedance spectroscopy module.

[0080] Based on the input of the power module, the multi-channel potentiostat fine-tunes each channel through internal circuitry (such as operational amplifiers and feedback networks), independently maintaining the set potential of the working electrode in each electrolyzer test unit to ensure the consistency of reaction conditions. Polarization curves and impedance spectra are monitored and recorded in real time through a dual potentiostat module and an electrochemical impedance spectroscopy module.

[0081] Electrochemical data (current, voltage) collected by the potentiostat, data collected by various sensors in the device, and analysis results (gas product concentration) from the gas chromatograph are synchronized via timestamps. This data can be integrated into the central controller via an Ethernet communication interface, enabling unified monitoring, analysis, and data processing. The controller then calculates key system indicators, issues commands to various devices in the device, and forms an automated feedback loop, achieving dynamic control of the device's process and electrochemical parameters.

[0082] This utility model provides an electrolytic cell testing device, which includes: a gas supply module, a gas distributor, a central storage tank, a distribution pump, multiple electrolytic cell testing modules, a multi-port selector valve, and a gas chromatograph. The gas supply module and the gas distributor are connected; the gas distributor is connected to each electrolytic cell testing module via a gas supply pipeline, and each valve in the gas distributor corresponds to one gas supply pipeline; the central storage tank and the distribution pump are connected; the distribution pump is connected to each electrolytic cell testing module via an electrolyte pipeline, and each valve in the distribution pump corresponds to one electrolyte pipeline; the gas chromatograph is connected to each electrolytic cell testing module via a corresponding valve of the multi-port selector valve. This device enables parallel testing of multiple electrolytic cell testing modules through the gas distributor, distribution pump, and multi-port selector valve, improving testing efficiency.

[0083] Finally, it should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other. The above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and are not intended to limit it. The scope of protection of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the scope of the technology disclosed in this application, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered 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 electrolytic cell testing device, characterized in that, The device includes: a gas supply module, a gas distributor, a central storage tank, a distribution pump, multiple electrolytic cell testing modules, a multi-port selection valve, and a gas chromatograph; The gas supply module is connected to the gas distributor; the gas distributor is connected to each electrolytic cell test module via a gas supply pipeline, and each valve in the gas distributor corresponds to a gas supply pipeline; the central storage tank is connected to the distribution pump; the distribution pump is connected to each electrolytic cell test module via an electrolyte pipeline, and each valve in the distribution pump corresponds to an electrolyte pipeline. The gas chromatograph and each electrolytic cell test module are connected by a pipeline through a corresponding valve of the multi-port selector valve.

2. The electrolytic cell testing apparatus according to claim 1, characterized in that, The device further includes: a flow indicator controller; One end of the flow indicator controller is connected to the connecting pipe between the gas supply module and the gas distributor; the other end of the flow indicator controller is connected to the gas distributor.

3. The electrolytic cell testing device according to claim 1, characterized in that, Each electrolytic cell test module includes: at least one electrolytic cell test unit, a cathode waste liquid tank, and an anode waste liquid tank; The gas source distributor is connected to each electrolytic cell test unit via a gas source pipeline; the distribution pump is connected to each electrolytic cell test unit via an electrolyte pipeline. The anode waste liquid tank is connected to the anode waste liquid outlet of each electrolytic cell test unit via an anode waste liquid pipeline; the cathode waste liquid tank is connected to the cathode waste liquid outlet of each electrolytic cell test unit via a cathode waste liquid pipeline. The gas chromatograph and each electrolytic cell test unit are connected by a pipeline through a corresponding valve of the multi-port selector valve.

4. The electrolytic cell testing apparatus according to claim 3, characterized in that, Any electrolytic cell test unit includes an electrolytic cell, an anode supply tank, an anode phase separator, an anode nitrogen actuator, an anode waste liquid flow valve, a cathode supply tank, a cathode phase separator, a cathode nitrogen actuator, and a cathode waste liquid flow valve; the gas source distributor is connected to the anode inlet of the electrolytic cell via a gas source pipeline; the distribution pump is connected to the first electrolyte inlet of each anode supply tank and the first electrolyte inlet of each cathode supply tank via electrolyte pipelines; The electrolyte outlet of the anode supply tank is connected to the anode inlet of the electrolytic cell via a pipeline; the anode outlet of the electrolytic cell is connected to the inlet of the anode phase separator via a pipeline; the gas outlet of the anode phase separator is connected to the inlet of the anode nitrogen actuator via a pipeline; the liquid outlet of the anode phase separator, the anode waste liquid tank, and the second electrolyte inlet of the anode supply tank are each connected to a corresponding valve of the anode waste liquid flow valve via a pipeline; the gas chromatograph is connected to the outlet of the anode nitrogen actuator via a corresponding valve of the multi-port selector valve. The electrolyte outlet of the cathode supply tank is connected to the cathode inlet of the electrolytic cell via a pipeline; the cathode outlet of the electrolytic cell is connected to the inlet of the cathode phase separator via a pipeline; the gas outlet of the cathode phase separator is connected to the inlet of the cathode nitrogen actuator via a pipeline; the liquid outlet of the cathode phase separator, the cathode waste liquid tank, and the second electrolyte inlet of the cathode supply tank are each connected to a corresponding valve of the cathode waste liquid flow valve via a pipeline; the gas chromatograph is connected to the outlet of the cathode nitrogen actuator via a corresponding valve of the multi-port selector valve.

5. The electrolytic cell testing apparatus according to claim 4, characterized in that, The electrolytic cell testing unit also includes: an anode diaphragm pump, an anode heat exchanger, an anode temperature indicator controller, a cathode diaphragm pump, a cathode heat exchanger, and a cathode temperature indicator controller; The electrolyte inlet of the anode supply tank is connected to the electrolyte inlet of the anode diaphragm pump via a pipeline; the electrolyte outlet of the anode diaphragm pump is connected to the electrolyte inlet of the anode heat exchanger via a pipeline; the electrolyte outlet of the anode heat exchanger is connected to the anode inlet of the electrolytic cell via a pipeline; and the anode temperature indicator controller is connected to the anode heat exchanger. The electrolyte inlet of the cathode supply tank is connected to the electrolyte inlet of the cathode diaphragm pump via a pipe; the electrolyte outlet of the cathode diaphragm pump is connected to the electrolyte inlet of the cathode heat exchanger via a pipe; the electrolyte outlet of the cathode heat exchanger is connected to the cathode inlet of the electrolytic cell via a pipe; and the cathode temperature indicator controller is connected to the cathode heat exchanger.

6. The electrolytic cell testing apparatus according to claim 4, characterized in that, The electrolytic cell testing unit also includes: a humidifier; The gas source distributor is connected to the electrolyte inlet of the humidifier via a gas source pipe; the electrolyte outlet of the humidifier is connected to the anode inlet of the electrolytic cell via a pipe.

7. The electrolytic cell testing apparatus according to claim 5, characterized in that, The electrolytic cell testing unit also includes: an anode nitrogen purging valve and a cathode nitrogen purging valve; The anode nitrogen purging valve is connected to the connecting pipe between the anode diaphragm pump and the anode heat exchanger via a pipeline; the cathode nitrogen purging valve is connected to the connecting pipe between the cathode diaphragm pump and the cathode heat exchanger via a pipeline.

8. The electrolytic cell testing apparatus according to claim 4, characterized in that, The electrolytic cell testing unit also includes: an anode conductivity sensor and a cathode conductivity sensor; The anode conductivity sensor is connected to the connecting pipe between the anode waste liquid flow valve and the anode supply tank; the cathode conductivity sensor is connected to the connecting pipe between the cathode waste liquid flow valve and the cathode supply tank.

9. The electrolytic cell testing apparatus according to claim 3, characterized in that, The electrolytic cell testing module also includes: a heating furnace; The heating furnace heats the outer shell of the electrolytic cell in each electrolytic cell test unit.

10. The electrolytic cell testing apparatus according to any one of claims 3 to 9, characterized in that, The device also includes a power supply module, and each electrolytic cell test module also includes a multi-channel potentiostat. The power supply module is connected to each electrolytic cell test unit in each electrolytic cell test module through a corresponding channel of the multi-channel potentiostat in each electrolytic cell test module.

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