Electrolytic tank with hydrogen elimination function

Abstract

The utility model discloses an electrolytic bath with a hydrogen elimination function, which comprises an electrolytic bath, an isolation cover is arranged outside the electrolytic bath, a catalysis net is hung at the upper part of the isolation cover, and the catalysis net is a metal mesh coated with a noble metal catalyst; the original structure of the electrolytic cell does not need to be changed, leaked hydrogen and oxygen in air are subjected to catalytic compounding through the precious metal catalytic net, hydrogen can be rapidly eliminated, the product obtained after hydrogen elimination is water vapor, safety and no pollution are achieved, products generated by exothermic reaction can be directly discharged into the atmosphere through an upper channel, driving of power equipment such as a draught fan is not needed, and energy is saved. Air outside the isolation hood can be supplemented into the isolation hood through the shutter ventilation windows on the isolation hood to form natural convective circulation, and the whole hydrogen elimination process is completely and spontaneously carried out without externally inputting energy, so that the reliability is high, and the safety performance of the electrolytic cell is improved.

Description

Technical Field

[0001] The utility model relates to an electrolytic cell with a self-hydrogen removal function, and relates to the technical field of electrolytic cells. Background Art

[0002] As hydrogen energy becomes increasingly widely used, hydrogen production technology is maturing. Equipment such as alkaline ALK water electrolysis, proton exchange membrane (PEM) water electrolysis, solid oxide SOEC (SOEC) water electrolysis, and anion exchange membrane (AEM) water electrolysis have been deployed to varying degrees, and the scale of hydrogen production by individual equipment is also increasing. Regardless of the type of hydrogen production equipment, all utilize a stacked design. Due to the small size of hydrogen molecules, leakage is highly likely. Although various hydrogen monitoring methods have been developed, electrolytic cell leaks are unavoidable. Failure to promptly eliminate leaks poses a significant safety hazard.

[0003] Published utility model CN212158964U discloses a "test device for detecting the hydrogen leakage rate of an electrolytic cell." This device features a sealed hood outside the electrolytic cell, with a hydrogen collection sampling tube located at its upper end. This isolates the electrolytic cell from the environment, allowing real-time measurement of the hydrogen concentration using a hydrogen concentration sensor. However, when the electrolytic cell is operating, the electrolysis reaction releases heat. Especially for SOECs operating at temperatures reaching 1000°C, the sealed hood restricts air flow around the device, thus affecting heat dissipation. Building on this device, invention patent CN118549048A discloses a "device and method for monitoring the sealing performance of an electrolytic cell," which incorporates a fan mounted on the sealed hood. When hydrogen leaks, the gas gathers at the top of the sealed hood. When it reaches the threshold of the hydrogen concentration sensor within the hood, the fan is triggered to blow air into the sealed hood, causing the gas to flow upward toward the converging top of the sealed hood. Simultaneously, the centrifugal exhaust fan in the exhaust duct connected to the converging top is also triggered, discharging the gas. Although this patent can detect hydrogen concentration and discharge the gas, it requires multiple sensors for control and has a slow response speed. If a power outage or signal transmission abnormality occurs, affecting the response time of the control system, the hydrogen cannot be discharged in a timely manner. Utility Model Content

[0004] The utility model provides an electrolytic cell with a self-hydrogen elimination function, which is used to overcome the defect of hydrogen leakage in the prior art water electrolysis hydrogen production equipment.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] The utility model discloses an electrolytic cell with a self-hydrogen removal function, comprising an electrolytic cell, an isolation cover is arranged outside the electrolytic cell, a catalytic net is suspended on the upper part of the isolation cover, and the catalytic net is a metal mesh coated with a precious metal catalyst.

[0007] Furthermore, the electrolyzer is any one of an alkaline ALK, a proton exchange membrane PEM, a solid oxide SOEC or an anion exchange membrane AEM water electrolysis hydrogen production electrolyzer.

[0008] Furthermore, the noble metal of the noble metal catalyst is platinum, palladium, ruthenium, rhodium, gold, silver or alloys thereof.

[0009] Furthermore, the isolation cover is provided with louvered ventilation windows on both sides of the electrolytic cell for replenishing air into the isolation cover. The top of the isolation cover is a gathering slope, and a grid is provided above the slope. A catalytic mesh is hung on the grid to allow leaked hydrogen to react with oxygen to produce a hydrogen-oxygen complex reaction to eliminate hydrogen. The top of the isolation cover is directly connected to the atmosphere.

[0010] Furthermore, the louver ventilation window is a louver structure, and the louver blades have an inclined angle with the wall surface of the isolation cover and are inclined inwardly.

[0011] Furthermore, the isolation cover is made of stainless steel and is covered with a hydrophobic anti-corrosion coating.

[0012] Furthermore, the hanging height of the catalytic screen is:

[0013]

[0014] Wherein, ΔP is the pressure difference, Pa; Ks is the characteristic coefficient; T0 is the absolute temperature of the outside air, K; T1 is the absolute temperature of the inside air, K; h is the height of the catalytic mesh, m.

[0015] The beneficial effects achieved by the present invention are as follows: without changing the original structure of the electrolyzer, the leaked hydrogen and oxygen in the air are catalytically compounded by using the precious metal catalytic mesh 3, so that the hydrogen can be quickly eliminated. The product after the hydrogen is eliminated is water vapor, which is safe and pollution-free. The products generated by the exothermic reaction can be directly discharged into the atmosphere through the upper channel without the need for power equipment such as a fan. The air outside the isolation cover can be replenished into the isolation cover through the louvered ventilation windows on the isolation cover, forming a natural convection cycle. The entire hydrogen elimination process is completely spontaneous and does not require external energy input. Therefore, the reliability is high, and the safety performance of the electrolyzer is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 It is a side view schematic diagram of the utility model;

[0019] Figure 3 It is a top view schematic diagram of the present utility model.

[0020] In the figure: 1. electrolytic cell; 2. isolation cover; 201. louvered ventilation window; 202. grid; 3. catalytic mesh. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0022] Example 1

[0023] like Figures 1 to 3 As shown, an electrolytic cell with a self-hydrogen removal function includes an electrolytic cell 1, an isolation cover 2 is provided on the outside of the electrolytic cell 1, and a catalytic mesh 3 is suspended on the upper part of the isolation cover 2.

[0024] The electrolytic cell 1 can be any one of an alkaline ALK, a proton exchange membrane PEM, a solid oxide SOEC or an anion exchange membrane AEM water electrolysis hydrogen production electrolytic cell.

[0025] The isolation cover 2 is provided with louvered ventilation windows 201 on both sides of the electrolytic cell 1 for replenishing air into the isolation cover 2. A converging slope is located above the isolation cover 2, and a grid 202 is provided above the slope. A catalytic mesh 3 is suspended on the grid 202 to allow leaked hydrogen to react with oxygen to eliminate the hydrogen. The top of the isolation cover 2 is directly connected to the atmosphere.

[0026] The catalytic mesh 3 is a metal mesh coated with a precious metal catalyst, and the precious metal is platinum, palladium, ruthenium, rhodium, gold, silver or an alloy thereof.

[0027] The hanging height of the catalytic screen 3 can be calculated by the following formula:

[0028]

[0029] Where ΔP is the pressure difference, Pa; K s is the characteristic coefficient; T0 is the absolute temperature of the outside air, K; T1 is the absolute temperature of the inside air, K; h is the height of the catalytic net, m.

[0030] The louver ventilation window 201 is a louver structure, and the louver blades are inclined at a certain angle to the wall of the isolation cover 2 and are inclined inwardly, which is conducive to the flow of outdoor air into the isolation cover 2.

[0031] The isolation cover 2 is made of stainless steel and is covered with a hydrophobic anti-corrosion coating, which is conducive to the condensed water vapor flowing downward on the wall so that it can be discharged on the ground.

[0032] When hydrogen leaks, due to its small size, it naturally flows upward and converges at the top of isolation hood 2. Under the action of the precious metal catalyst on catalytic mesh 3, the hydrogen reacts with oxygen in the air to form water vapor, releasing a large amount of heat. This causes the surrounding air temperature to rise and the density to decrease. The hydrogen then flows directly into the atmosphere through the channel above the grid 202. At this time, due to the pressure differential, air outside isolation hood 2 is replenished into isolation hood 2 through the louvered ventilation windows 201, forming a natural convection circulation flow within isolation hood 2.

[0033] This solution can be used in various electrolytic water electrolysis hydrogen production electrolyzers 1 without changing the original structure of the electrolyzer 1; the precious metal catalytic mesh 3 is used to catalytically recombine the leaked hydrogen and oxygen in the air, which can quickly eliminate the hydrogen. The product after the hydrogen is eliminated is water vapor, which is safe and pollution-free, and the products generated by the exothermic reaction can be directly discharged into the atmosphere through the upper channel without the need for power equipment such as a fan. Due to the pressure difference in the isolation cover 2, the air outside the isolation cover 2 can be replenished into the isolation cover 2 through the louvered ventilation windows 201 on the isolation cover 2, forming a natural convection cycle. The entire hydrogen elimination process is completely spontaneous and does not require external energy input. Therefore, it has high reliability and increases the safety performance of the electrolyzer 1.

[0034] It should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will appreciate that they may modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, improvements, and the like that fall within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention. The terms used in the description of this application are intended only to describe specific embodiments and are not intended to limit the exemplary embodiments of the present invention. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to scale. Technologies, methods, and devices known to persons skilled in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely illustrative and not limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters denote similar items in the following figures. Therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0035] It should be noted that the terms "first," "second," etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than those illustrated or described herein, and that the objects distinguished by "first," "second," etc. are generally of the same type, and do not limit the number of objects. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0036] It should be noted that, in the description of this application, the directions or positional relationships indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional terms do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional terms "inside and outside" refer to the inside and outside relative to the outline of each component itself.

Claims

1. An electrolyzer with self-hydrogen removal function, characterized in that: The invention comprises an electrolytic cell, an isolation cover is provided on the outside of the electrolytic cell, a catalytic mesh is suspended on the upper part of the isolation cover, and the catalytic mesh is a metal mesh coated with a precious metal catalyst; the precious metal of the precious metal catalyst is platinum, palladium, ruthenium, rhodium, gold, silver or an alloy thereof.

2. The electrolyzer with self-hydrogen removal function according to claim 1, characterized in that: The electrolyzer is any one of an alkaline ALK, a proton exchange membrane PEM, a solid oxide SOEC or an anion exchange membrane AEM water electrolysis hydrogen production electrolyzer.

3. The electrolyzer with self-hydrogen removal function according to claim 1, characterized in that: The isolation cover is provided with louvered ventilation windows on both sides of the electrolytic cell for replenishing air into the isolation cover; The top of the isolation cover is a gathering slope, and a grid is provided above the slope. A catalytic mesh is hung on the grid to allow leaked hydrogen to react with oxygen to produce a hydrogen-oxygen compound reaction and eliminate hydrogen. The top of the isolation cover is directly connected to the atmosphere.

4. The electrolyzer with self-hydrogen removal function according to claim 3, characterized in that: The louver ventilation window is a louver structure, and the louver blades have an inclined angle with the wall surface of the isolation cover and are inclined inwardly.

5. The electrolyzer with self-hydrogen removal function according to claim 1, characterized in that: The isolation cover is made of stainless steel and is covered with a hydrophobic anti-corrosion coating.

6. The electrolyzer with self-hydrogen removal function according to claim 1, characterized in that: The hanging height of the catalytic screen is: Where ΔP is the pressure difference, Pa; K s is the characteristic coefficient; T0 is the absolute temperature of the outside air, K; T1 is the absolute temperature of the inside air, K; h is the height of the catalytic net, m.

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