Anode and cathode separation tank water supplementing device of an alkaline electrolyzer test bench

Abstract

The utility model relates to electrolytic water hydrogen production technical field especially an alkaline electrolytic cell test board cathode and anode separation tank water supply device, including, cathode gas liquid separation subassembly is used for separating the gas with lye that cathode produces, anode gas liquid separation subassembly is used for separating the gas with lye that anode produces, water supply subassembly, the both ends of water supply subassembly output respectively with cathode gas liquid separation subassembly and anode gas liquid separation subassembly link to each other, are used for providing water supply for both, and, differential pressure monitoring subassembly is connected between cathode gas liquid separation subassembly and anode gas liquid separation subassembly, is used for monitoring the pressure difference of both, the utility model discloses can open or close the water supply passageway fast, cooperates the backflow prevention design of check valve, can effectively avoid lye to pour to pump body or pipeline, prevents equipment corrosion and water supply failure, is not affected by bubble adhesion in electrolytic process, ensures liquid level detection accurate, avoids dry burning or overflow.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen production technology through water electrolysis, and in particular to a water replenishment device for the anode and cathode separation tank of an alkaline electrolyzer test bench. Background Technology

[0002] Alkaline electrolyzers (ALK) are one of the most commercially mature technologies for hydrogen production through water electrolysis. Due to their advantages such as low cost, long lifespan, and large scalability potential, this technology is widely used in green hydrogen production, energy storage, and chemical industries.

[0003] In the research, development, testing and production of electrolyzers, the electrolyzer test bench is a key piece of equipment used to simulate actual operating conditions and verify the performance of the electrolyzer (such as hydrogen production efficiency, energy consumption, stability, etc.). The core subsystems of the test bench include the power supply system, the electrolyzer body, the gas-liquid separation system and the water replenishment system.

[0004] The reliability of the water replenishment system directly affects the operational safety and testing accuracy of the electrolyzer. Existing water replenishment technologies have some problems, such as unreliable liquid level detection, interference from air bubbles that can cause sensor failure and false alarms, low water replenishment accuracy, imbalance of water replenishment between the anode and cathode, and slow response speed.

[0005] To address these issues, those skilled in the art have proposed a water replenishment device for the anode and cathode separation tank of an alkaline electrolytic cell test bench. Utility Model Content

[0006] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0007] In view of the problems of unreliable liquid level detection and low water replenishment accuracy in the above or existing technologies, this utility model is proposed.

[0008] Therefore, the purpose of this utility model is to provide a water replenishment device for the anode and cathode separation tank of an alkaline electrolytic cell test bench.

[0009] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a water replenishment device for the anode and cathode separation tank of an alkaline electrolytic cell test bench, comprising a cathode gas-liquid separation component for separating the gas generated at the cathode from the alkaline solution;

[0010] An anode gas-liquid separation unit is used to separate the gas generated at the anode from the alkaline solution.

[0011] A water supply assembly, wherein the two ends of the output terminal of the water supply assembly are respectively connected to the cathode gas-liquid separation assembly and the anode gas-liquid separation assembly, for providing water supply to both; and,

[0012] A differential pressure monitoring component is connected between the cathode gas-liquid separation component and the anode gas-liquid separation component to monitor the pressure difference between the two.

[0013] As a preferred embodiment of the water supply device for the anode and cathode separation tank of the alkaline electrolytic cell test bench of this utility model, the water supply component includes a high-pressure water pump, a solenoid valve, and a check valve. The outlet of the high-pressure water pump is connected to the solenoid valve through a pipeline. The end of the solenoid valve away from the high-pressure water pump is connected to the check valve. The check valve is connected to the cathode gas-liquid separation component and the anode gas-liquid separation component respectively. The solenoid valve is used to control the opening and closing of the water supply pipeline. The check valve is used to prevent alkaline backflow. The high-pressure water pump can supply water normally under a back pressure of 3MPa. The response time of the solenoid valve is less than 50ms.

[0014] As a preferred embodiment of the anode-cathode separation tank water supply device of the alkaline electrolytic cell test bench of this utility model, the cathode gas-liquid separation component includes a cathode gas-liquid separation tank, a cathode magnetic level gauge, and a cathode pressure sensor. The cathode magnetic level gauge and the cathode pressure sensor are both installed on the cathode gas-liquid separation tank. The cathode magnetic level gauge is used to monitor the liquid level in the tank and link it with the water supply component. The cathode pressure sensor is used to detect the back pressure in the tank.

[0015] As a preferred embodiment of the anode-cathode separation tank water supply device of the alkaline electrolytic cell test bench of this utility model, the anode gas-liquid separation component includes an anode gas-liquid separation tank, an anode magnetic level gauge, and an anode pressure sensor. The anode magnetic level gauge and the anode pressure sensor are both installed on the anode gas-liquid separation tank. The anode magnetic level gauge is used to monitor the liquid level in the tank and link it with the water supply component. The anode pressure sensor is used to detect the back pressure in the tank.

[0016] As a preferred embodiment of the water replenishment device for the anode and cathode separation tanks of the alkaline electrolytic cell test bench of this utility model, wherein: magnetic floats are provided inside both the cathode gas-liquid separation tank and the anode gas-liquid separation tank, and the magnetic floats are linked with the corresponding cathode magnetic level gauge and anode magnetic level gauge.

[0017] As a preferred embodiment of the water replenishment device for the anode and cathode separation tanks of the alkaline electrolytic cell test bench of this utility model, wherein: both the cathode gas-liquid separation tank and the anode gas-liquid separation tank are equipped with capacitive sensors and ultrasonic sensors, and the capacitive sensors and ultrasonic sensors, together with the corresponding cathode magnetic level gauges and anode magnetic level gauges, form a multi-level detection system.

[0018] As a preferred embodiment of the water replenishment device for the anode and cathode separation tanks of the alkaline electrolytic cell test bench of this utility model, the differential pressure monitoring component includes a differential pressure sensor and a connecting pipeline, wherein the differential pressure sensor is connected to the cathode gas-liquid separation tank and the anode gas-liquid separation tank respectively through the connecting pipeline.

[0019] The beneficial effects of the water replenishment device for the anode and cathode separation tank of the alkaline electrolytic cell test bench of this utility model are as follows:

[0020] In a single-channel water supply pipeline, the solenoid valve has a response time of less than 50ms, enabling it to quickly open or close the water supply path. Combined with the anti-backflow design of the check valve, it can effectively prevent alkaline solution from flowing back into the pump body or pipeline, thus preventing equipment corrosion and water supply failure. The high-pressure water pump can operate normally under a back pressure of 3MPa, making it compatible with medium and high-pressure electrolysis systems. This ensures stable water supply power under high-pressure conditions and prevents water supply interruption due to insufficient pressure.

[0021] The magnetic float level gauge monitors the liquid level through the mechanical linkage of a magnetic float, which is unaffected by the adhesion of air bubbles during electrolysis, ensuring accurate liquid level detection. The magnetic float level gauge, along with capacitive and ultrasonic sensors, forms a multi-level detection system. When the main sensor (such as the capacitive sensor) fails due to a malfunction, the magnetic float level gauge can still provide basic liquid level data and link with the water replenishment system to achieve emergency protection, preventing dry burning or overflow. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0023] Figure 1 A schematic diagram of the overall structure of the water replenishment device for the anode and cathode separation tank of the alkaline electrolytic cell test bench.

[0024] Figure 2 This is a schematic diagram of the differential pressure monitoring component of the water replenishment device for the anode and cathode separation tank of an alkaline electrolytic cell test bench.

[0025] Figure 3 This is a schematic diagram of the cathode gas-liquid separation component and the anode gas-liquid separation component of the water replenishment device for the anode and cathode separation tank of the alkaline electrolytic cell test bench.

[0026] In the diagram: 100, water supply components; 1, high-pressure water pump; 2, solenoid valve; 3, check valve;

[0027] 200. Cathode gas-liquid separation assembly; 4. Cathode gas-liquid separation tank; 5. Cathode magnetic level gauge; 9. Cathode pressure sensor;

[0028] 300. Anode gas-liquid separation assembly; 7. Anode gas-liquid separation tank; 8. Anode magnetic level gauge; 10. Anode pressure sensor;

[0029] 400. Differential pressure monitoring component; 6. Differential pressure sensor; 11. Connecting pipeline. Detailed Implementation

[0030] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0031] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0033] Example 1

[0034] Reference Figures 1 to 3 This is the first embodiment of the present invention. This embodiment provides a water replenishment device for the anode and cathode separation tank of an alkaline electrolysis cell test bench, which can achieve the effect of more accurate liquid level detection without being affected by the adhesion of electrolysis bubbles. It includes a cathode gas-liquid separation component 200, which is used to separate the gas generated by the cathode from the alkaline solution.

[0035] Anode gas-liquid separation assembly 300 is used to separate the gas generated at the anode from the alkaline solution;

[0036] A water supply assembly 100 has its output terminals connected to a cathode gas-liquid separation assembly 200 and an anode gas-liquid separation assembly 300, respectively, to provide water supply to both; and,

[0037] The differential pressure monitoring component 400 is connected between the cathode gas-liquid separation component 200 and the anode gas-liquid separation component 300 to monitor the pressure difference between the two components.

[0038] Specifically, the water supply assembly 100 includes a high-pressure water pump 1, a solenoid valve 2, and a check valve 3. The outlet end of the high-pressure water pump 1 is connected to the solenoid valve 2 through a pipeline. The end of the solenoid valve 2 away from the high-pressure water pump 1 is connected to the check valve 3. The check valve 3 is connected to the cathode gas-liquid separation assembly 200 and the anode gas-liquid separation assembly 300, respectively.

[0039] Solenoid valve 2 is used to control the opening and closing of the water supply pipeline, check valve 3 is used to prevent alkali backflow, high-pressure water pump 1 can supply water normally under a back pressure of 3MPa, and the response time of solenoid valve 2 is less than 50ms.

[0040] Furthermore, the cathode gas-liquid separation assembly 200 includes a cathode gas-liquid separation tank 4, a cathode magnetic level gauge 5, and a cathode pressure sensor 9, both of which are mounted on the cathode gas-liquid separation tank 4.

[0041] The cathode magnetic level gauge 5 is used to monitor the liquid level in the tank and link it with the water supply assembly 100. The cathode pressure sensor 9 is used to detect the back pressure in the tank.

[0042] The anode gas-liquid separation assembly 300 includes an anode gas-liquid separation tank 7, an anode magnetic level gauge 8, and an anode pressure sensor 10. Both the anode magnetic level gauge 8 and the anode pressure sensor 10 are installed on the anode gas-liquid separation tank 7.

[0043] The anode magnetic level gauge 8 is used to monitor the liquid level in the tank and link it with the water supply assembly 100. The anode pressure sensor 10 is used to detect the back pressure in the tank.

[0044] It should be noted that both the cathode gas-liquid separator 4 and the anode gas-liquid separator 7 are equipped with magnetic floats, which are linked to the corresponding cathode magnetic level gauge 5 and anode magnetic level gauge 8.

[0045] Magnetic floats are typically hollow structures with permanent magnets inside. Their overall density is less than that of alkaline electrolytes. Magnetic floats are mostly composed of a cylindrical float body and hemispheres at both ends. High-temperature magnets are installed near the top hemisphere of the float body to generate a stable magnetic field for subsequent magnetic coupling with the cathode magnetic level gauge 5 and the anode magnetic level gauge 8.

[0046] When the magnetic float rises or falls with the liquid level, the magnetic field generated by the magnet inside it passes through the non-magnetic measuring tube wall and interacts with the magnetic material of the flip plate inside the external cathode magnetic level gauge 5 and anode magnetic level gauge 8 to form a continuous liquid level indicator bar, which visually shows the liquid level height in the separation tank.

[0047] The liquid level is monitored in real time by the mechanical linkage between the magnetic float and the cathode magnetic level gauge 5 and the anode magnetic level gauge 8. When the liquid level is lower than the dry burning warning threshold or higher than the overflow warning threshold, the cathode magnetic level gauge 5 and the anode magnetic level gauge 8 directly send a trigger signal to the water supply component 100 to start or stop the basic protection of water replenishment.

[0048] Example 2

[0049] Reference Figures 1 to 3 This is the second embodiment of the present invention. Unlike the previous embodiment, both the cathode gas-liquid separator 4 and the anode gas-liquid separator 7 are equipped with capacitive sensors and ultrasonic sensors. The capacitive sensors and ultrasonic sensors, together with the corresponding cathode magnetic level gauge 5 and anode magnetic level gauge 8, form a multi-stage detection system.

[0050] The capacitive and ultrasonic sensors perform their own detection. When the cathode magnetic level gauge 5 and the anode magnetic level gauge 8 fail due to mechanical failure (such as float jamming), they can independently detect abnormal liquid levels, ensuring that dry burning or overflow signals are not lost.

[0051] By comparing data from two sensors, misjudgments caused by interference from a single sensor, such as bubbles or scale, can be avoided (e.g., magnetic float level gauges are not affected by bubbles, and the measurement deviation of ultrasonic sensors can be verified).

[0052] Specifically, the differential pressure monitoring component 400 includes a differential pressure sensor 6 and a connecting pipe 11. The differential pressure sensor 6 is connected to the cathode gas-liquid separator 4 and the anode gas-liquid separator 7 through the connecting pipe 11.

[0053] During use, the pressure difference between the two is monitored in real time by the differential pressure sensor 6 (ensuring <30Pa). When the pressure is unbalanced (such as a sudden increase in pressure on one side causing abnormal rise or fall in the liquid level), the pressure signal is linked to the water supply component 100 and the system pressure regulating device to quickly balance the pressure on both sides, thereby reducing the drastic changes in liquid level caused by pressure fluctuations from the source and indirectly reducing the risk of dry burning or overflow.

[0054] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A water replenishment device for the anode and cathode separation tank of an alkaline electrolytic cell test bench, characterized in that: include, A cathode gas-liquid separation assembly (200) is used to separate the gas generated at the cathode from the alkaline solution; Anode gas-liquid separation assembly (300) is used to separate the gas generated at the anode from the alkaline solution; A water supply assembly (100) is provided, the two ends of the output end of which are connected to the cathode gas-liquid separation assembly (200) and the anode gas-liquid separation assembly (300) respectively, for providing water to both. as well as, A differential pressure monitoring component (400) is connected between the cathode gas-liquid separation component (200) and the anode gas-liquid separation component (300) to monitor the pressure difference between the two components.

2. The water replenishment device for the anode and cathode separation tank of the alkaline electrolytic cell test bench as described in claim 1, characterized in that: The water supply assembly (100) includes a high-pressure water pump (1), a solenoid valve (2) and a check valve (3). The outlet end of the high-pressure water pump (1) is connected to the solenoid valve (2) through a pipeline. The end of the solenoid valve (2) away from the high-pressure water pump (1) is connected to the check valve (3). The check valve (3) is connected to the cathode gas-liquid separation assembly (200) and the anode gas-liquid separation assembly (300) respectively.

3. The water replenishment device for the anode and cathode separation tank of the alkaline electrolytic cell test bench as described in claim 2, characterized in that: The cathode gas-liquid separation assembly (200) includes a cathode gas-liquid separation tank (4), a cathode magnetic level gauge (5), and a cathode pressure sensor (9). The cathode magnetic level gauge (5) and the cathode pressure sensor (9) are both installed on the cathode gas-liquid separation tank (4).

4. The water replenishment device for the anode and cathode separation tank of the alkaline electrolytic cell test bench as described in claim 3, characterized in that: The anode gas-liquid separation assembly (300) includes an anode gas-liquid separation tank (7), an anode magnetic level gauge (8), and an anode pressure sensor (10). The anode magnetic level gauge (8) and the anode pressure sensor (10) are both installed on the anode gas-liquid separation tank (7).

5. The water replenishment device for the anode and cathode separation tank of the alkaline electrolytic cell test bench as described in claim 4, characterized in that: Both the cathode gas-liquid separator (4) and the anode gas-liquid separator (7) are equipped with magnetic floats, which are linked to the corresponding cathode magnetic level gauge (5) and anode magnetic level gauge (8).

6. The water replenishment device for the anode and cathode separation tank of the alkaline electrolytic cell test bench as described in claim 5, characterized in that: Both the cathode gas-liquid separator (4) and the anode gas-liquid separator (7) are equipped with capacitive sensors and ultrasonic sensors. The capacitive sensors and ultrasonic sensors, together with the corresponding cathode magnetic level gauge (5) and anode magnetic level gauge (8), form a multi-level detection system.

7. The water replenishment device for the anode and cathode separation tank of the alkaline electrolytic cell test bench as described in claim 6, characterized in that: The differential pressure monitoring component (400) includes a differential pressure sensor (6) and a connecting pipe (11). The differential pressure sensor (6) is connected to the cathode gas-liquid separator (4) and the anode gas-liquid separator (7) respectively through the connecting pipe (11).

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