Electrolyte level control device for aem water electrolysis hydrogen generation system

Abstract

The utility model relates to an electrolyte liquid level control device of AEM water electrolysis hydrogen production system, including liquid storage tank and its top liquid inlet and cylindrical convex. The convex top is equipped with the axle hole, inside is equipped with the sliding rod, the sliding rod top end is equipped with the piston block that can slide up and down in the axle hole, the bottom end is connected the float ball. The cylindrical convex bottom is equipped with multiple liquid leakage channels, and the liquid inlet is communicated with the axle hole. The liquid storage tank top is equipped with the liquid storage pool, and is communicated with the axle hole. When working, the liquid storage pool is filled with electrolyte. If the liquid level of liquid storage tank is low, the float ball sinks, and the piston block is at the bottom end of the axle hole, and the electrolyte flows into the liquid storage tank through the liquid leakage channel. When the liquid level rises to the standard height, the float ball floats, pushes the piston block to move up, blocks the liquid leakage channel, and stops liquid supplement. With electrolysis consumption, the liquid level drops, and the float ball sinks again, realizes mechanical automatic liquid supplement, and maintains the stability of liquid level and concentration.

Description

Technical Field

[0001] This utility model relates to the field of water electrolysis technology, and in particular to an electrolyte level control device for an AEM water electrolysis hydrogen production system. Background Technology

[0002] In the process of producing hydrogen by water electrolysis, direct current is passed through the electrolyte in the electrolyzer, and water molecules undergo electrochemical reactions at the electrodes. Hydrogen gas and hydroxide ions are generated at the cathode, and the hydroxide ions migrate through the membrane to the anode. At the anode, the hydroxide ions lose electrons to generate oxygen. The main functions of the electrolyte in the process of producing hydrogen by water electrolysis are to provide ion conduction, reduce power consumption, protect the electrodes, and extend the service life of the electrolyzer.

[0003] The commonly used electrolyte components are mainly potassium hydroxide (KOH) solution or potassium hydroxide (KOH) solution, and the mass concentration of potassium hydroxide (KOH) solution is usually 2-4%.

[0004] Electrolysis inevitably involves changes in solution concentration, making liquid level detection and replenishment extremely complex. Therefore, it is particularly important to achieve automated replenishment in a simple and efficient manner. Utility Model Content

[0005] The purpose of this invention is to provide an electrolyte level control device for an AEM water electrolysis hydrogen production system to solve the problems existing in the prior art.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: An AEM water electrolysis hydrogen production system electrolyte level control device includes a storage tank. An inlet is located at the center of the top of the storage tank. A cylindrical protrusion is located on the top of the storage tank, coaxially aligned with the inlet. The top of the cylindrical protrusion has a shaft hole adapted to the inlet. A vertically oriented slide rod is located inside the storage tank. The top of the slide rod is slidably installed within the inlet and extends upwards into the shaft hole. Multiple leakage channels are evenly distributed axially at the bottom of the cylindrical protrusion. The bottom of each leakage channel communicates with the inlet, and the top of each leakage channel communicates with the top of the shaft hole. A piston block is fixedly installed on the top of the slide rod, sliding vertically within the shaft hole. A float ball is fixedly installed at the bottom of the slide rod, located inside the storage tank. A storage pool is fixedly installed on the top of the storage tank, and the shaft hole communicates with the interior of the storage pool.

[0007] By adopting the above technical solution, the storage tank needs to be filled with the standard solution for electrolysis during use. If there is no liquid in the storage tank, the float cannot float, and the slide rod drives the piston block to slide to the bottom of the shaft hole. The inside of the storage tank is connected to the inside of the storage pool through the liquid inlet, the liquid leakage channel, and the shaft hole. The liquid in the storage pool is poured into the inside of the storage tank. When the solution in the storage tank reaches the standard position, the float floats up. The piston moves upward to the top of the shaft hole under the push of the slide rod. The piston block blocks the connection between the liquid leakage channel and the storage pool. As the liquid in the storage tank is consumed, the volume and concentration of the liquid in the storage tank change. At this time, the automatic liquid replenishment can be achieved mechanically by the fixed buoyancy required by the float.

[0008] In a further embodiment, the slide bar is configured from top to bottom as a threaded surface, a smooth surface, and another threaded surface, with the axial length of the smooth surface being 1.2 times the thickness of the piston block.

[0009] By adopting the above technical solution, the position of the piston block on the slide rod is adjusted by screwing nuts into the upper and lower ends of the slide rod, making it easy to adjust during installation and testing.

[0010] In a further embodiment, a plurality of sealing rings are fitted between the surfaces of the piston block and the slide rod that are in contact.

[0011] In a further embodiment, a level gauge is fixedly installed inside the liquid storage tank.

[0012] By adopting the above technical solution, the level gauge is used to indicate whether liquid needs to be added to the storage tank. For safety reasons, a concentration dosimeter can also be installed inside the storage tank to monitor the concentration of the solution inside the storage tank, so as to avoid incorrect solvent concentration when adding liquid to the storage tank.

[0013] In a further embodiment, a groove with internal and external communication is provided on one side of the liquid storage tank, and a transparent cover plate for completely sealing the groove is fixedly installed inside the groove.

[0014] By adopting the above technical solution, workers can observe whether the liquid inside the storage tank is above the warning line, which facilitates regular inspection and recording. Because the outer wall of the piston block needs to be tightly fitted with the inner wall of the shaft hole, there will be a certain delay in the piston block closing and opening the liquid inlet channel. Therefore, it is sufficient as long as the liquid inside the storage tank is within the range of the lowest and highest liquid level lines.

[0015] In a further embodiment, a drain port is provided at the bottom of the liquid storage tank, and a valve is fixedly installed inside the drain port.

[0016] The above technical solution is used for regularly draining waste liquid from the storage tank and cleaning the inside of the storage tank.

[0017] In summary, this utility model has the following beneficial effects: 1. The piston block is slid to the bottom of the shaft hole by the sliding rod. The inside of the liquid storage tank is connected to the inside of the liquid storage pool through the liquid inlet, the liquid leakage channel, the shaft hole, and the liquid storage pool. The liquid in the liquid storage pool is poured into the inside of the liquid storage tank. When the solution inside the liquid storage tank reaches the standard position, the float floats up. The piston moves upward to the top of the shaft hole under the push of the sliding rod. The piston block blocks the connection between the liquid leakage channel and the liquid storage pool. As the liquid inside the liquid storage tank is consumed, the volume and concentration of the liquid inside the liquid storage tank are changing. At this time, the automatic liquid replenishment action can be achieved mechanically by the fixed buoyancy required by the float. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram illustrating the internal structure of the cylindrical protrusion and the liquid storage tank of this utility model.

[0019] In the diagram, 1 is the storage tank; 2 is the slide bar; 3 is the piston block; 4 is the float; 5 is the level gauge; and 6 is the concentration meter. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings.

[0021] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1 In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.

[0022] Example 1: like Figures 1-2As shown, the electrolyte level control device of the AEM water electrolysis hydrogen production system includes a storage tank 1. An inlet is located at the center of the top of the storage tank 1. A cylindrical protrusion is located on the top of the storage tank 1, coaxially aligned with the inlet. The top of the cylindrical protrusion has a shaft hole adapted to the inlet. A vertically oriented slide rod 2 is located inside the storage tank 1. The top of the slide rod 2 is slidably installed inside the inlet, and extends upwards into the shaft hole. Multiple leakage channels are evenly arranged axially at the bottom of the cylindrical protrusion. The bottom of the leakage channels communicates with the inlet, and the top of the leakage channels communicates with the top of the shaft hole. A piston block 3 is fixedly installed on the top of the slide rod 2, sliding vertically within the shaft hole. A float 4 located inside the storage tank 1 is fixedly installed at the bottom of the slide rod 2. A storage tank is fixedly installed on the top of the storage tank 1. The shaft hole connects to the storage tank. The internal structure is interconnected; the slide rod 2 is configured from top to bottom as a threaded surface, a smooth surface, and another threaded surface, with the axial length of the smooth surface being 1.2 times the thickness of the piston block 3; multiple sealing rings are fitted between the surfaces of the piston block 3 and the slide rod 2; a level gauge 5 is fixedly installed inside the liquid storage tank; a groove with internal and external communication is provided on one side of the liquid storage tank 1, and a transparent cover plate is fixedly installed in the groove to completely seal the groove, allowing workers to observe whether the liquid inside the liquid storage tank is above the warning line, facilitating regular inspection and recording. Because the outer wall of the piston block needs to be tightly fitted with the inner wall of the shaft hole, there will be a certain delay in closing and opening the liquid inlet channel. Therefore, it is acceptable as long as the liquid inside the liquid storage tank is within the range of the minimum and maximum liquid levels; a drain port is provided at the bottom of the liquid storage tank 1, and a valve is fixedly installed in the drain port; a pressure relief valve is provided at the top of the liquid storage tank.

[0023] Specific implementation process: During use, the storage tank needs to be filled with the standard solution for electrolysis. If there is no liquid inside the storage tank, the float cannot float. The slide rod drives the piston block to slide to the bottom of the shaft hole. The inside of the storage tank is connected to the inside of the storage tank through the liquid inlet, the liquid leakage channel, and the shaft hole. The liquid inside the storage tank is poured into the inside of the storage tank. When the solution inside the storage tank reaches the standard position, the float floats up. The piston moves upward to the top of the shaft hole under the push of the slide rod. The piston block blocks the connection between the liquid leakage channel and the storage tank. As the liquid inside the storage tank is consumed, the volume and concentration of the liquid inside the storage tank change. At this time, the automatic liquid replenishment can be achieved mechanically by using the fixed buoyancy required by the float.

[0024] The storage tank in this design is a closed box structure, its function being to replenish the electrolyte inside storage tank 1. A pressure relief valve on the top of the storage tank is used to periodically reduce the pressure inside the tank. During operation, the electrolyte flows out on one side and circulates back on the other, so a pipeline is needed to achieve this function. During electrolysis, the water exiting the electrolytic cell also contains oxygen; both oxygen and water return to the storage tank, so a gas-liquid separation module is needed in the middle, using a conventional gas-liquid separator.

[0025] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.

[0026] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. An electrolyte level control device for an AEM water electrolysis hydrogen production system, characterized in that: The system includes a liquid storage tank (1), with an inlet located at the center of the top of the liquid storage tank (1). A cylindrical protrusion is located on the top of the liquid storage tank (1), coaxially with the inlet. The top of the cylindrical protrusion has a shaft hole adapted to the inlet. A vertically oriented sliding rod (2) is located inside the liquid storage tank (1), with its top end slidably mounted within the inlet. The top end of the sliding rod (2) extends upwards into the shaft hole. Multiple leaks are evenly distributed axially at the bottom of the cylindrical protrusion. The liquid channel has a bottom that is connected to the liquid inlet and a top that is connected to the top of the shaft hole. A piston block (3) is fixedly installed on the top of the slide rod (2). The piston block (3) is installed in the shaft hole and slides up and down. A float ball (4) is fixedly installed at the bottom of the slide rod (2) inside the liquid storage tank (1). A liquid storage pool is fixedly installed on the top of the liquid storage tank (1). The liquid storage pool is a closed box structure. The shaft hole is connected to the inside of the liquid storage pool. A pressure relief valve is provided on the top of the liquid storage tank.

2. The electrolyte level control device for the AEM water electrolysis hydrogen production system according to claim 1, characterized in that: The slide bar (2) is configured from top to bottom as a threaded surface, a smooth surface, and a threaded surface, with the axial length of the smooth surface being 1.2 times the thickness of the piston block (3).

3. The electrolyte level control device for the AEM water electrolysis hydrogen production system according to claim 1, characterized in that: Multiple sealing rings are fitted between the surfaces of the piston block (3) and the slide rod (2).

4. The electrolyte level control device for the AEM water electrolysis hydrogen production system according to claim 1, characterized in that: A level gauge (5) is fixedly installed inside the liquid storage tank.

5. The electrolyte level control device for the AEM water electrolysis hydrogen production system according to claim 1, characterized in that: The liquid storage tank (1) has a groove that is connected to the inside and outside on one side, and a transparent cover plate for completely sealing the groove is fixedly installed in the groove.

6. The electrolyte level control device for the AEM water electrolysis hydrogen production system according to claim 1, characterized in that: The bottom of the liquid storage tank (1) is provided with a drain port, and a valve is fixedly installed inside the drain port.

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