Gas purification equipment for hydrogen production based on high-temperature fuel waste heat utilization

Abstract

The invention discloses gas purification equipment for hydrogen production based on high-temperature fuel waste heat utilization, which belongs to the field of hydrogen production. The gas purification equipment comprises a purification box with a gas outlet formed in the upper end, one side of the purification box is communicated with a gas inlet pipe, and the bottom of the purification box is filled with sodium hydroxide absorption liquid; and the gas outlet end of thegas inlet pipe is located at the bottom of the sodium hydroxide absorption liquid. According to the scheme, the saturated sodium hydroxide solution is firstly used for absorbing carbon dioxide, and sodium hydroxide can be added into the solution through pulling of the suspension balls in the absorption process, so that the effective concentration of the sodium hydroxide is kept, and the removal rate of the carbon dioxide is effectively increased; the selective adsorption resin on the intercepting net absorbs a hydrochloric acid solution of cuprous chloride from the inside, carbon monoxide penetrating through the intercepting net is absorbed by the selective adsorption resin, and therefore the purpose of purification is achieved, the removal rate of the carbon monoxide is effectively increased, doped water vapor is removed through the water-absorbent resin, and the gas purification effect is further improved.

Description

technical field [0001] The invention relates to the field of hydrogen production, more specifically, to a gas purification device for hydrogen production based on high-temperature fuel waste heat utilization. Background technique [0002] Hydrogen production, the process of producing hydrogen. Hydrogen energy is a secondary energy source. From a long-term perspective, hydrogen production from water is the most promising method. The raw materials are inexhaustible, and water is generated after hydrogen combustion releases energy, which does not cause environmental pollution. Commonly used hydrogen production methods include: hydrogen production from various fossil fuels, hydrogen production from electrolyzed water, hydrogen production from biomass, hydrogen production from other hydrogen-combining substances, and recovery of by-product hydrogen from various chemical processes. Hydrogen production from various fossil fuels is the most important hydrogen production method, but...

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Problems solved by technology

[0004] In addition to the required hydrogen, the gas coming out of the shift tower also contains carbon dioxide and a small amount of unreacted carbon monoxide, so it needs to be purified. The current method of removing carbon dioxide is to press the gas into water to dissolve CO2, and then pass through the ammonia-containing cuprous formate (or containing cuprous ammonia acetate) solution to remove residual CO to obtain pure hydrogen, but the dissolution rate of carbon dioxide in water is low, the purification is not thorough enough, and after absorbing carbon monoxide with the solution, the concentration of the solution will gradually decrease, and the absorption effect getting worse gradually

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