A fuel cell exhaust hydrogen elimination device

Abstract

The invention discloses a fuel cell tail gas hydrogen elimination device, which belongs to the field of fuel cell tail gas treatment. Through the setting of a hydrogen sensor, when there is hydrogen in the tail gas discharged from the device body, the tail gas is controlled to pass into the device body again through a return pipe for catalysis. At the same time, during this process, when the exhaust gas moves into the device body along the return gas pipe, under the gas squeezing force, the pneumatic early warning pipe is partially displaced, so that the end of the gas collapsed sealing rod is removed from the pneumatic early warning pipe. The inside of the tube falls off. On the one hand, it can be observed that the internal air-collapse sealing rod collapses. On the other hand, during the local displacement of the pneumatic early warning tube, the rotating color spheres are dislocated and ruptured, which in turn makes multiple color strips on the surface of the color-transparent layer appear. The state of obvious color blocks, and then visually has a double early warning effect for the staff on site, so that the staff can replace and supplement the catalyst in time, effectively ensure the continuous elimination of hydrogen, and effectively reduce potential safety hazards.

Description

technical field [0001] The invention relates to the field of fuel cell exhaust gas treatment, and more particularly, to a fuel cell exhaust gas hydrogen elimination device. Background technique [0002] The fuel cell uses hydrogen as fuel to electrochemically react with oxygen to generate electricity and water. There is a small amount of hydrogen in the exhaust gas emitted during the reaction process. In a poorly ventilated underground environment, hydrogen may accumulate at the top and cause combustion or even explosion. It is necessary to ensure safety. The hydrogen concentration in the exhaust gas is reduced as much as possible by technical means. In the prior art, the hydrogen and oxygen in the exhaust gas are generally catalytically reacted to generate liquid water, which can eliminate more than 90% of the hydrogen. Then, the liquid water is separated by the steam-water separator and discharged into the water storage tank of the fuel cell, and the exhaust gas after dehy...

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Problems solved by technology

[0003] However, in the above-mentioned dehydrogenation process, due to the long-term use of the catalyst, although the catalyst is inconvenient before and after the chemical equation, there is still a certain loss, and the catalytic performance of the catalyst decreases. However, when the above phenomenon occurs before the catalyst replacement time is reached, in this case, there is still a certain amount of hydrogen in the tail gas discharged from the hydrogen elimination device, and there is still a certain potential safety hazard

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