Fuel cell tail gas dehydrogenation device

Abstract

The invention discloses a fuel cell tail gas dehydrogenation device and belongs to the field of fuel cell tail gas treatment.The fuel cell tail gas dehydrogenation device is characterized in that by arranging a hydrogen sensor, when hydrogen exists in tail gas discharged by a device body, the tail gas is controlled to be introduced into the device body again through a gas return pipe to be subjected to a catalytic reaction, and circulating treatment of the tail gas is achieved; when tail gas moves into the device body along the gas return pipe, the pneumatic early warning pipe locally displaces under gas extrusion force, so that the end part of the gas collapse sealing rod falls off from the pneumatic early warning pipe, on one hand, collapse of the internal gas collapse sealing rod can be observed, and on the other hand, in the local displacement process of the pneumatic early warning pipe, the rotation color balls are staggered and broken, and the gas collapse sealing rod is prevented from falling off. According to the invention, the color-permeable layer is arranged on the surface of the catalyst, so that a plurality of color overflow strips on the surface of the color-permeable layer are in a state of obvious color blocks, a double early warning effect is visually achieved for on-site workers, the workers can replace and supplement the catalyst in time, continuous elimination of hydrogen is effectively ensured, and potential safety hazards are effectively reduced.

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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