Alkaline water electrolysis hydrogen production multi-working-condition testing device

Abstract

The embodiment of the utility model provides an alkaline water electrolysis hydrogen production multi-working-condition testing device, the alkaline water electrolysis hydrogen production multi-working-condition testing device comprises an alkali liquor box, an electrolytic bath, a monitoring assembly and a control assembly, the alkali liquor box is used for storing alkali liquor; the electrolytic bath is communicated with the alkali liquor box and is used for electrolyzing to generate hydrogen; the monitoring assembly comprises a flow meter arranged at the outlet end of the alkali liquor box and a voltage monitor arranged on the electrolytic bath; the control assembly comprises a controller, a variable frequency pump and a regulating valve, the controller is connected with the flow meter and the voltage monitor to obtain the reading of the flow meter and the reading of the voltage monitor, and the variable frequency pump and the regulating valve are electrically connected with the controller; the variable-frequency pump is connected with the alkali liquor tank; the regulating valve is arranged between the alkali liquor tank and the electrolytic bath. The multi-working-condition testing device for hydrogen production by alkaline electrolyzed water provided by the embodiment of the utility model aims at testing electrolysis parameters of alkaline electrolyzed water under various working conditions so as to obtain better working condition parameters, and the reliability and efficiency of hydrogen production by alkaline electrolyzed water are improved.

Description

Technical Field

[0001] The present application belongs to the technical field of hydrogen production, and specifically relates to a multi-operating condition testing device for producing hydrogen by alkaline water electrolysis. Background Art

[0002] As a new energy source, hydrogen has the advantages of no pollution to the environment and high heat production. Water electrolysis is a more convenient method to produce hydrogen. By passing direct current into an electrolytic cell filled with electrolyte, water molecules undergo chemical reactions on the electrodes and decompose into hydrogen and oxygen. Water electrolysis technology is a method of preparing hydrogen based on direct current and water. It is widely used in wind and solar energy areas to achieve the effect of peak load reduction and valley filling. The produced hydrogen is used as a long-term energy storage.

[0003] Alkaline water electrolysis is an important solution for hydrogen production. In the process of hydrogen production by alkaline water electrolysis, various operating parameters (such as alkali concentration, electrolyzer temperature, alkali circulation volume, system pressure, electrolyzer load, hydrogen-oxygen separator liquid level difference, etc.) will affect the reliability and efficiency of hydrogen production. Therefore, it is particularly important to obtain the parameter sizes of alkaline water electrolysis under various operating conditions to improve the reliability and efficiency of hydrogen production. Utility Model Content

[0004] The technical problem to be solved by the present application is to provide a multi-operating condition testing device for hydrogen production by alkaline water electrolysis, which can improve the reliability and efficiency of hydrogen production by alkaline water electrolysis.

[0005] In the first aspect, an embodiment of the present application provides a multi-condition test device for hydrogen production by alkaline water electrolysis, which includes an alkali liquid tank, an electrolytic cell, a monitoring component and a control component, wherein the alkali liquid tank is used to store alkali liquid; the electrolytic cell is connected to the alkali liquid tank and is used to electrolyze and produce hydrogen and oxygen; the monitoring component includes a flow meter arranged at the outlet end of the alkali liquid tank and a voltage monitor arranged on the electrolytic cell; the control component includes a controller, a variable frequency pump and a regulating valve, the controller is connected to the flow meter to obtain the reading of the flow meter, the controller is connected to the voltage monitor to obtain the reading of the voltage monitor, the variable frequency pump and the regulating valve are electrically connected to the controller; the variable frequency pump is connected to the alkali liquid tank to transport the alkali liquid in the alkali liquid tank to the electrolytic cell, and the regulating valve is arranged between the alkali liquid tank and the electrolytic cell.

[0006] According to an embodiment provided in the first aspect of the present application, the monitoring component also includes a density meter and a thermometer, and the density meter and the thermometer are respectively connected to the controller; the density meter and the thermometer are both arranged between the alkali solution tank and the electrolytic cell.

[0007] According to an embodiment provided in the first aspect of the present application, the density meter and the thermometer are both arranged in the alkali solution tank.

[0008] According to an embodiment provided in the first aspect of the present application, the monitoring component also includes a temperature monitor, which is electrically connected to the controller and is disposed on the electrolytic cell to monitor the temperature of the alkali solution in the electrolytic cell; the control component also includes a heat exchanger, which is connected to the controller and is disposed at the inlet end of the electrolytic cell to adjust the temperature of the alkali solution flowing into the electrolytic cell.

[0009] According to an embodiment provided in the first aspect of the present application, the electrolytic cell includes a plurality of electrolytic chambers isolated from each other; a voltage monitor is arranged in each electrolytic chamber, and / or a temperature monitor is arranged in each electrolytic chamber.

[0010] According to an embodiment provided in the first aspect of the present application, the heat exchanger includes a main body and a heat exchange valve, the main body is arranged between the alkali liquid tank and the electrolytic cell, and the heat exchange valve is arranged at the inlet end of the main body to control the flow rate of the heat exchange medium flowing into the main body.

[0011] According to an embodiment provided in the first aspect of the present application, the multi-operating condition testing device for hydrogen production by alkaline water electrolysis also includes a gas-liquid separator connected to the electrolytic cell, the monitoring component also includes a pressure transmitter, the pressure transmitter is electrically connected to the controller and is arranged in the gas-liquid separator; the control component also includes a gas regulating valve, the gas regulating valve is electrically connected to the controller and connected to the gas-liquid separator.

[0012] According to an embodiment provided in the first aspect of the present application, the gas-liquid separator includes a first gas-liquid separation component and a second gas-liquid separation component, the first gas-liquid separation component and the second gas-liquid separation component are both connected to the electrolytic cell and respectively store hydrogen and oxygen produced by electrolysis; the pressure transmitter includes a first transmitter arranged in the first gas-liquid separation component, and a second transmitter arranged in the second gas-liquid separation component; the gas regulating valve includes a first valve body connected to the first gas-liquid separation component, and a second valve body connected to the second gas-liquid separation component.

[0013] According to an embodiment provided in the first aspect of the present application, the monitoring component also includes a differential pressure transmitter, and the differential pressure transmitter is electrically connected to the controller.

[0014] According to an embodiment provided in the first aspect of the present application, the electrolytic cell also includes a power supply, and the power supply is electrically connected to the controller.

[0015] The beneficial effect of the present application is that, by setting a monitoring component and a control component, the monitoring component is used to monitor the parameters of the alkali liquid tank or the electrolyzer under different working conditions, and the control component is used to calculate the hydrogen production efficiency according to the parameters read by the monitoring component, and then the working conditions of the components arranged on the alkali liquid tank, the electrolyzer or the connecting pipeline are changed according to the measurement results, so as to obtain better hydrogen production efficiency through feedback adjustment; by setting a monitoring component including a flow meter, and a control component including a controller, a variable frequency pump and a regulating valve, the alkali liquid flow rate parameters flowing out of the alkali liquid tank are obtained through the flow meter, and then the controller is used to adjust the frequency conversion pump and the regulating valve in a dual adjustment mode to test and obtain the optimal alkali liquid circulation flow rate, and then it is obtained how to improve the reliability and hydrogen production efficiency of alkaline water electrolysis by controlling the flow of alkali liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the connection structure of the alkaline water electrolysis hydrogen production multi-operating condition test device provided in the first aspect embodiment of the present application.

[0018] In the figure, 100 is a multi-condition test device for hydrogen production by alkaline water electrolysis; 10 is an alkaline water tank; 20 is an electrolytic cell; 31 is a flow meter; 32 is a voltage monitor; 33 is a density meter; 34 is a thermometer; 35 is a temperature monitor; 361 is a first transmitter; 362 is a second transmitter; 37 is a differential pressure transmitter; 42 is a variable frequency pump; 43 is a regulating valve; 44 is a heat exchanger; 441 is a main body; 442 is a heat exchange valve; 451 is a first valve body; 452 is a second valve body; 51 is a first gas-liquid separation component; 52 is a second gas-liquid separation component. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0020] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0021] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0022] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0024] The term "multiple" as used in the present application refers to more than two (including two). Similarly, the term "multiple groups" refers to more than two groups (including two groups), and the term "multiple sheets" refers to more than two sheets (including two sheets).

[0025] Figure 1 It is a schematic diagram of the connection structure of the alkaline water electrolysis hydrogen production multi-operating condition test device provided in the first aspect embodiment of the present application.

[0026] like Figure 1As shown, an embodiment of the present application provides a multi-condition test device 100 for producing hydrogen by electrolysis of alkaline water, which includes an alkali liquid tank 10, an electrolyzer 20, a monitoring component (unnumbered) and a control component (unnumbered), wherein the alkali liquid tank 10 is used to store alkali liquid; the electrolyzer 20 is connected to the alkali liquid tank 10 and is used to electrolyze and produce hydrogen; the monitoring component includes a flow meter 31 arranged at the outlet end of the alkali liquid tank 10 and a voltage monitor 32 arranged on the electrolyzer 20; the control component includes a controller, a variable frequency pump 42 and a regulating valve 43, the controller is connected to the flow meter 31 to obtain the reading of the flow meter 31, the controller is connected to the voltage monitor 32 to obtain the reading of the voltage monitor, the variable frequency pump 42 and the regulating valve 43 are electrically connected to the controller; the variable frequency pump 42 is connected to the alkali liquid tank 10 to transport the alkali liquid in the alkali liquid tank 10 to the electrolyzer 20, and the regulating valve 43 is arranged between the alkali liquid tank 10 and the electrolyzer 20.

[0027] The alkaline water electrolysis hydrogen production multi-operating condition testing device 100, as the name implies, is used to test and adjust the operating parameters of various positions of the alkaline water electrolysis hydrogen production device, so that the alkaline water electrolysis hydrogen production device can operate under better operating conditions, thereby improving the reliability and hydrogen production efficiency of the alkaline water electrolysis hydrogen production process.

[0028] The alkali liquid tank 10 is a device for storing an alkaline solution. In these embodiments of the present application, the alkaline solution stored in the alkali liquid tank 10 is the electrolytic solution of the electrolytic cell 20. By using the electrolytic cell 20 to electrolyze alkaline water, the conductivity of the electrolytic solution can be increased, thereby improving the electrolysis efficiency. For example, in these embodiments of the present application, the alkali liquid can be a sodium hydroxide solution.

[0029] In these embodiments of the present application, the aforementioned alkali liquid tank 10 and the electrolytic cell 20 can be regarded as a simple alkaline water electrolysis hydrogen production device, wherein the alkali liquid tank 10 is a storage component for the electrolytic solution, and the electrolytic cell 20 is a reaction component for electrolytic hydrogen production.

[0030] The electrolytic cell 20 is connected to the alkali liquid tank 10. A possible implementation method is that the electrolytic cell 20 is connected to the alkali liquid tank 10 through a connecting pipe so that the alkali liquid in the alkali liquid tank 10 can be continuously replenished into the electrolytic cell 20. At the same time, it is also necessary to replenish the electrolytic solution into the alkali liquid tank 10 in real time.

[0031] The monitoring component and the control component are two components coupled to the aforementioned alkaline water electrolysis hydrogen production device, wherein the monitoring component is used to monitor various parameters in the alkaline water electrolysis hydrogen production device, and the control component is used to feedback and adjust the alkaline water electrolysis hydrogen production device according to the monitoring results of the monitoring component, so as to obtain parameters of various working conditions under better hydrogen production efficiency and improve the efficiency of subsequent hydrogen production.

[0032] The monitoring component includes a flow meter 31 arranged at the outlet end of the alkali liquid tank 10, which is used to measure the flow of alkali liquid at the outlet end of the alkali liquid tank 10, and is used to indicate the alkali liquid circulation volume of the alkaline water electrolysis hydrogen production device; at the same time, the voltage monitor 32 is used to monitor the real-time voltage of the electrolytic cell 20.

[0033] In these embodiments of the present application, the controller is connected to the flow meter 31 to obtain the reading of the flow meter 31. After the controller obtains the reading of the flow meter 31, the electrolysis performance of the electrolyzer 20 under the alkali solution flow rate can be measured according to the reading of the voltage monitor 32, and a working instruction can be sent to the variable frequency pump 42 or the regulating valve 43 according to the test needs to adjust the opening and closing size of the variable frequency pump 42 and the regulating valve 43, and adjust the alkali solution flow rate of the alkaline water electrolysis hydrogen production device to explore the relationship between the alkali solution circulation volume and the electrolysis efficiency in the alkaline water electrolysis hydrogen production device.

[0034] It should be noted that in these embodiments of the present application, setting the voltage monitor 32 on the electrolyzer 20 means setting the voltage monitor 32 above the electrolyzer 20 and avoiding contact between the voltage monitor 32 and the internal environment of the electrolyzer 20. In this way, the possibility of contact between the oxygen-rich and hydrogen-rich environment in the electrolyzer 20 and the voltage monitor 32 can be reduced, thereby further improving the reliability of the alkaline water electrolysis hydrogen production multi-condition test device 100.

[0035] In some embodiments, a voltage monitor 32 may also be disposed in a small chamber above the electrolytic cell 20 , so that the voltage monitor 32 can be used to monitor the voltage readings of each small chamber.

[0036] The variable frequency pump 42 and the regulating valve 43 are electrically connected to the controller, which means that the variable frequency pump 42 is electrically connected to the controller, and the regulating valve 43 is electrically connected to the controller, so that the controller is used to control and adjust the opening and closing size of the variable frequency pump 42 or the regulating valve 43. In these embodiments of the present application, the variable frequency pump 42 and the regulating valve 43 are used to perform dual adjustment on the alkali solution circulation amount of the alkaline water electrolysis hydrogen production device to more accurately control the alkali solution circulation amount.

[0037] For example, in some embodiments, the frequency conversion pump 42 can be used to make preliminary adjustments to the circulation volume of the alkali solution to adjust the circulation volume of the alkali solution to a flow value close to the flow value required for the test, and then the regulating valve 43 can be used to finely adjust the circulation volume of the alkali solution to make the circulation volume of the alkali solution consistent with the flow value required for the test.

[0038] The variable frequency pump 42 is connected to the alkali liquid tank 10 to transport the alkali liquid in the alkali liquid tank 10 to the electrolytic cell 20, which means that the variable frequency pump 42 is a pumping component for the alkali liquid in the alkali liquid tank 10. In these embodiments of the present application, the variable frequency pump 42 is arranged between the alkali liquid tank 10 and the electrolytic cell 20.

[0039] The regulating valve 43 is arranged between the alkali liquid tank 10 and the electrolytic cell 20. A possible implementation is that the variable frequency pump 42 and the regulating valve 43 are connected in series. In some embodiments, the variable frequency pump 42 and the regulating valve 43 can also be connected in parallel.

[0040] For example, in the embodiments of the present application, the controller may be set as a programmable logic controller (PLC), so as to utilize the controller to realize the value reading of the aforementioned flow meter 31 and the feedback control and adjustment of the variable frequency pump 42 and the regulating valve 43.

[0041] By setting a monitoring component and a control component, the monitoring component is used to monitor the parameters of the alkali liquid tank 10 or the electrolyzer 20 under different working conditions, and the control component is used to calculate the hydrogen production efficiency according to the parameters read by the monitoring component, and then the working conditions of the components arranged on the alkali liquid tank 10, the electrolyzer 20 or the connecting pipeline are changed according to the measurement results, so as to obtain better hydrogen production efficiency through feedback adjustment; by setting a monitoring component including a flow meter 31, and a control component including a controller (not shown), a variable frequency pump 42 and a regulating valve 43, the alkali liquid flow rate parameters flowing out of the alkali liquid tank 10 are obtained through the flow meter 31, and then the controller is used to adjust the dual mode of the variable frequency pump 42 and the regulating valve 43 to test and obtain the optimal alkali liquid circulation flow rate, and then how to improve the reliability and hydrogen production efficiency of alkaline water electrolysis by controlling the flow of alkali liquid.

[0042] According to an embodiment provided in the first aspect of the present application, the monitoring component also includes a density meter 33 and a thermometer 34, and the density meter 33 and the thermometer 34 are respectively connected to the controller; the density meter 33 and the thermometer 34 are both arranged between the alkali liquid tank 10 and the electrolytic cell 20.

[0043] In these embodiments of the present application, the density meter 33 can be set as an electronic density meter to monitor the density of the alkali solution circulating in the alkaline water electrolysis hydrogen production device using the density meter 33, and the temperature of the alkali solution circulating in the alkaline water electrolysis hydrogen production device using the thermometer 34.

[0044] The density meter 33 and the thermometer 34 are connected to the controller respectively, so that the controller can be used to obtain the readings of the density meter 33 and the thermometer 34 respectively, and the real-time concentration of the circulating alkali solution can be calculated according to the density and temperature of the circulating alkali solution. The controller is then used to obtain the reading of the voltage monitor 32 to obtain the relationship between the concentration of the circulating alkali solution in the alkaline water electrolysis hydrogen production device and the efficiency of electrolytic hydrogen production.

[0045] The density meter 33 and the thermometer 34 are both arranged between the alkali liquid tank 10 and the electrolytic cell 20, which means that the density meter 33 and the thermometer 34 can be arranged in the alkali liquid tank 10, the electrolytic cell 20, or in the connecting pipeline between the alkali liquid tank 10 and the electrolytic cell 20 to monitor the real-time density and temperature in the alkaline water electrolysis hydrogen production device.

[0046] According to an embodiment provided in the first aspect of the present application, the density meter 33 and the thermometer 34 are both arranged in the alkali liquid tank 10. The density meter 33 and the thermometer 34 are operated in a relatively stable working environment to improve the monitoring data accuracy of the density meter 33 and the thermometer 34.

[0047] According to an embodiment provided in the first aspect of the present application, the monitoring component also includes a temperature monitor 35, which is electrically connected to the controller and is disposed on the electrolytic cell 20 to monitor the temperature of the alkali solution in the electrolytic cell 20; the control component also includes a heat exchanger 44, which is connected to the controller and is disposed at the inlet end of the electrolytic cell 20 to adjust the temperature of the alkali solution flowing into the electrolytic cell 20.

[0048] The temperature monitor 35 is electrically connected to the controller, which means that the controller can obtain the reading of the temperature monitor 35 in real time, or the temperature monitor 35 can transmit its own reading information to the controller in real time.

[0049] The temperature monitor 35 is disposed on the electrolytic cell 20 to monitor the temperature of the alkaline solution in the electrolytic cell 20. A possible factual manner is that the temperature monitor 35 can be used to monitor the overall electrolysis temperature of the electrolytic cell 20; in some embodiments, the temperature monitor 35 can also be used to monitor the electrolysis temperature of a portion of the electrolytic cell 20.

[0050] Accordingly, in these embodiments of the present application, the temperature monitor 35 is arranged on the electrolytic cell 20, which also means that the temperature monitor 35 is arranged above the electrolytic cell 20 to avoid contact between the temperature monitor 35 and the internal environment of the electrolytic cell 20. In this way, the possibility of contact between the oxygen-rich and hydrogen-rich environment in the electrolytic cell 20 and the temperature monitor 35 can be reduced, thereby further improving the reliability of the alkaline water electrolysis hydrogen production multi-condition testing device 100.

[0051] In some embodiments, a temperature monitor 35 may also be disposed in a small chamber above the electrolytic cell 20 , so that the temperature reading of each small chamber can be monitored by the temperature monitor 35 .

[0052] The control component also includes a heat exchanger 44, which is used to adjust the temperature of the alkaline water entering the electrolytic cell 20. In some embodiments, the heat exchange medium in the heat exchanger 44 can be set to be liquid or gaseous, but is not limited to it.

[0053] The heat exchanger 44 is connected to the controller and is arranged at the inlet end of the electrolytic cell 20 to adjust the temperature of the alkali solution flowing into the electrolytic cell 20. A possible implementation method is that the heat exchanger 44 can increase or decrease the opening size of its own valve body under the control of the controller. The larger the cooling medium flow rate, the lower the alkali solution temperature, thereby adjusting the heat exchange efficiency of the heat exchanger 44; at the same time, the part of the heat exchanger 44 used for heat exchange is arranged on the connecting pipe between the alkali solution tank 10 and the electrolytic cell 20, so as to utilize the heat exchange medium inside the heat exchanger 44 to exchange heat with the alkali solution in the connecting pipe, thereby achieving the effect of controlling the temperature of the alkali solution entering the electrolytic cell 20.

[0054] According to an embodiment provided in the first aspect of the present application, the electrolytic cell 20 includes a plurality of mutually isolated electrolytic chambers (not shown); a voltage monitor 32 is disposed in each electrolytic chamber, and / or a temperature monitor 35 is disposed in each electrolytic chamber.

[0055] The electrolysis chamber is the smallest hydrogen production unit in the electrolyzer 20, and is usually composed of two electrodes (cathode and anode) and an electrolyte. In the electrolysis chamber, electric current passes through the electrolyte, producing a chemical reaction on the electrodes, thereby electrolyzing water into hydrogen and oxygen.

[0056] The electrolytic cell 20 includes a plurality of electrolytic chambers isolated from each other, which means that there may be a plurality of electrolytic chambers, and the electrolytic hydrogen production processes between the electrolytic chambers are relatively independent and do not interfere with each other.

[0057] The voltage monitor 32 is disposed in each electrolysis chamber, which means that there can be multiple voltage monitors 32 (the same as the number of electrolysis chambers), and one voltage monitor 32 is used to detect the voltage of one electrolysis chamber.

[0058] The temperature monitor 35 is disposed in each electrolysis chamber, which means that there can be multiple temperature monitors 35 (the same as the number of electrolysis chambers), and one temperature monitor 35 is used to detect the temperature of one electrolysis chamber.

[0059] According to an embodiment provided in the first aspect of the present application, the heat exchanger 44 includes a main body 441 and a heat exchange valve 442. The main body 441 is arranged between the alkali liquid tank 10 and the electrolytic cell 20. The heat exchange valve 442 is arranged at the inlet end of the main body 441 to control the flow rate of the heat exchange medium flowing into the main body 441.

[0060] The main body 441 is a component in the heat exchanger 44 for storing flowing heat exchange medium. In these embodiments of the present application, the main body 441 can be provided with a channel for connecting the connecting pipe between the alkali liquid tank 10 and the electrolytic cell 20, so that the alkali liquid in the alkali liquid tank 10 flows to the electrolytic cell through the channel; at the same time, the main body 441 also has a channel for circulating heat exchange medium, so that the channel for circulating alkali liquid and the channel for circulating heat exchange medium in the main body 441 are isolated from each other to perform heat exchange.

[0061] The heat exchange valve 442 is arranged on the aforementioned channel for circulating the heat exchange medium to control the flow speed and flow rate of the heat exchange medium, and then adjust the temperature of the alkali solution. That is, the larger the opening of the heat exchange valve 442, the greater the flow rate of the cooling medium, and the lower the temperature of the alkali solution.

[0062] In these embodiments of the present application, the heat exchange valve 442 is electrically connected to the controller so that the controller can control the opening and closing size of the heat exchange valve 442.

[0063] According to an embodiment provided in the first aspect of the present application, the alkaline water electrolysis hydrogen production multi-condition testing device 100 also includes a gas-liquid separator (unnumbered) connected to the electrolytic cell 20, and the monitoring component also includes a pressure transmitter (unnumbered), which is electrically connected to the controller and disposed in the gas-liquid separator; the control component also includes a gas regulating valve (unnumbered), which is electrically connected to the controller and connected to the gas-liquid separator.

[0064] The gas-liquid separator is an important component in the alkaline water electrolysis hydrogen production device. Its function is to separate hydrogen and oxygen from the hydrogen and oxygen produced by water electrolysis. That is, in the process of water electrolysis, water molecules will be decomposed into hydrogen and oxygen on the positive and negative electrodes respectively, and hydrogen and oxygen will form two-phase flow with alkaline solution respectively. The function of the gas-liquid separator is to separate these hydrogen and oxygen from the alkaline solution so that the hydrogen and oxygen can be collected for subsequent use and treatment.

[0065] The pressure transmitter is electrically connected to the controller and is disposed in the gas-liquid separator, so that the pressure transmitter can sense the pressure parameter in the gas-liquid separator and transmit the pressure parameter to the controller. The controller can then measure the effect of the pressure transmitter on the efficiency of hydrogen production by electrolysis of alkaline water at different pressure values ​​according to the voltage value fed back by the voltage monitor 32.

[0066] At the same time, the gas regulating valve is electrically connected to the controller and connected to the gas-liquid separator, that is, the controller can be used to control the opening and closing degree of the gas regulating valve, and the optimal pressure parameters in the gas-liquid separator can be obtained through multiple feedback adjustments, which is beneficial to the subsequent adjustment of the reliability and efficiency of hydrogen production by electrolysis of alkaline water by adjusting the pressure parameters of the gas-liquid separator.

[0067] According to an embodiment provided in the first aspect of the present application, the gas-liquid separator includes a first gas-liquid separation component 51 and a second gas-liquid separation component 52, the first gas-liquid separation component 51 and the second gas-liquid separation component 52 are both connected to the electrolytic cell 20, and respectively store hydrogen and oxygen produced by electrolysis; the pressure transmitter includes a first transmitter 361 arranged in the first gas-liquid separation component 51, and a second transmitter 362 arranged in the second gas-liquid separation component 52; the gas regulating valve includes a first valve body 451 connected to the first gas-liquid separation component 51, and a second valve body 452 connected to the second gas-liquid separation component 52.

[0068] In these embodiments of the present application, the first gas-liquid separation component 51 and the second gas-liquid separation component 52 are respectively connected to the electrolytic cell 20 to store hydrogen and oxygen respectively.

[0069] The first transmitter 361 is used to monitor the pressure of the first gas-liquid separation component 51 in real time, and the second transmitter 362 is used to monitor the pressure of the second gas-liquid separation component 52 in real time, so as to regulate the opening and closing degrees of the first valve body 451 and the second valve body 452 respectively through the controller, and then measure the influence of the system pressure on the efficiency of hydrogen production by electrolysis of alkaline water, which is beneficial to subsequently control the internal pressure of the first gas-liquid separation component 51 and the second gas-liquid separation component 52, so as to improve the reliability and efficiency of hydrogen production by electrolysis of alkaline water.

[0070] According to an embodiment provided in the first aspect of the present application, the monitoring component further includes a differential pressure transmitter 37, and the differential pressure transmitter 37 is electrically connected to the controller.

[0071] In these embodiments of the present application, a differential pressure transmitter 37 electrically connected to the controller is provided to reflect the liquid level difference between the first gas-liquid separation component 51 and the second gas-liquid separation component 52 through the numerical value of the differential pressure transmitter 37, and then the controller can be used to control and adjust the opening and closing sizes of the first valve body 451 and the second valve body 452 respectively.

[0072] In these embodiments of the present application, the differential pressure transmitter 37 is mainly used to explore the safety performance of hydrogen production by electrolysis of alkaline water under different operating parameters, reduce the situation of a large pressure difference between the first gas-liquid separation component 51 and the second gas-liquid separation component 52, and improve safety and reliability.

[0073] According to an embodiment provided in the first aspect of the present application, the electrolytic cell 20 further includes a power supply (not shown), and the power supply is electrically connected to the controller.

[0074] In these embodiments of the present application, a power supply is electrically connected to a controller to adjust the load of the electrolyzer 20 by adjusting the output current of the power supply, and the electrolysis hydrogen production efficiency is measured by the reading of the voltage monitor 32 to analyze the changes in the hydrogen production efficiency of the alkaline water electrolysis hydrogen production device at different loads.

[0075] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of protection of the present application is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0076] One or more embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A multi-operating condition testing device (100) for producing hydrogen by alkaline water electrolysis, characterized in that: include: A lye tank, used for storing lye; An electrolytic cell (20), connected to the alkali liquid tank and used for generating hydrogen and oxygen by electrolysis; A monitoring component, comprising a flow meter (31) arranged at the outlet end of the alkali liquid tank and a voltage monitor (32) arranged on the electrolytic cell (20); A control component, comprising a controller, a variable frequency pump (42) and a regulating valve (43), wherein the controller is connected to the flow meter (31) to obtain a reading of the flow meter (31), the controller is connected to the voltage monitor (32) to obtain a reading of the voltage monitor (32), and the variable frequency pump (42) and the regulating valve (43) are electrically connected to the controller; The variable frequency pump (42) is connected to the alkali liquid tank to transport the alkali liquid in the alkali liquid tank to the electrolytic cell (20), and the regulating valve (43) is arranged between the alkali liquid tank and the electrolytic cell (20).

2. The alkaline water electrolysis hydrogen production multi-operating condition testing device (100) according to claim 1, characterized in that: The monitoring component further comprises a density meter (33) and a thermometer (34), wherein the density meter (33) and the thermometer (34) are respectively connected to the controller; The density meter (33) and the thermometer (34) are both arranged between the alkali liquid tank and the electrolytic cell (20).

3. The alkaline water electrolysis hydrogen production multi-operating condition testing device (100) according to claim 2, characterized in that: The density meter (33) and the thermometer (34) are both arranged in the alkali solution tank.

4. The alkaline water electrolysis hydrogen production multi-operating condition testing device (100) according to claim 1, characterized in that: The monitoring component further comprises a temperature monitor (35), the temperature monitor (35) being electrically connected to the controller, and the temperature monitor (35) being arranged in the electrolytic cell (20) to monitor the temperature of the alkali solution in the electrolytic cell (20); The control component also includes a heat exchanger (44), which is connected to the controller and arranged at the inlet end of the electrolytic cell (20) to adjust the temperature of the alkali solution flowing into the electrolytic cell (20).

5. The alkaline water electrolysis hydrogen production multi-operating condition testing device (100) according to claim 4, characterized in that: The electrolytic cell (20) comprises a plurality of mutually isolated electrolytic chambers; The voltage monitor (32) is arranged in each electrolysis chamber, and / or the temperature monitor (35) is arranged in each electrolysis chamber.

6. The alkaline water electrolysis hydrogen production multi-operating condition testing device (100) according to claim 4 or 5, characterized in that: The heat exchanger (44) includes a main body (441) and a heat exchange valve (442). The main body (441) is arranged between the alkali liquid tank and the electrolytic cell (20). The heat exchange valve (442) is arranged at the inlet end of the main body (441) to control the flow rate of the heat exchange medium flowing into the main body (441).

7. The alkaline water electrolysis hydrogen production multi-operating condition testing device (100) according to claim 1, characterized in that: The alkaline water electrolysis hydrogen production multi-operating condition testing device (100) further comprises a gas-liquid separator connected to the electrolytic cell (20); The monitoring assembly further includes a pressure transmitter, which is electrically connected to the controller and is disposed in the gas-liquid separator; The control component further comprises a gas regulating valve (43), wherein the gas regulating valve (43) is electrically connected to the controller and connected to the gas-liquid separator.

8. The alkaline water electrolysis hydrogen production multi-operating condition testing device (100) according to claim 7, characterized in that: The gas-liquid separator comprises a first gas-liquid separation component (51) and a second gas-liquid separation component, wherein the first gas-liquid separation component (51) and the second gas-liquid separation component are both connected to the electrolytic cell (20) and respectively store hydrogen and oxygen generated by electrolysis; The pressure transmitter includes a first transmitter (361) arranged in the first gas-liquid separation component (51), and a second transmitter (362) arranged in the second gas-liquid separation component; the gas regulating valve (43) includes a first valve body (451) connected to the first gas-liquid separation component (51), and a second valve body (452) connected to the second gas-liquid separation component.

9. The alkaline water electrolysis hydrogen production multi-operating condition testing device (100) according to claim 8, characterized in that: The monitoring component further comprises a differential pressure transmitter (37), and the differential pressure transmitter (37) is electrically connected to the controller.

10. The alkaline water electrolysis hydrogen production multi-operating condition testing device (100) according to claim 1, characterized in that: The electrolytic cell (20) also includes a power supply, which is electrically connected to the controller.

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