Regeneration technology of hydrogen-generation adsorbent

Abstract

The invention provides a regeneration technology of a hydrogen-generation adsorbent. A hydrogen-generation operation system is removed from a pretreater with an inactive adsorbent, and other pretreaters of the operation system operate normally; superheated steam generated by a power plant are treated to be regenerative steam, then the regenerative steam is uninterruptedly fed into the pretreaterfrom the top of the pretreater, the regenerative steam regenerates the adsorbent in the pretreater and then is discharged from the bottom of the pretreater, and after the adsorbent is regenerated to be qualified, feeding of the regenerative steam is stopped; hot regenerative gas and cold regenerative gas generated by the operation system are introduced from the top of the pretreater, the hot regenerative gas passes through the interior of the pretreater to remove moisture of the adsorbent, and an adsorption tower with the moisture being removed is cooled to the operation temperature of the adsorption tower by the cold regenerative gas; and the adsorption ability of the pretreater is restored, and the pretreater enters a stand-by pretreater or is merged into the operation system. Accordingto the regeneration technology, the adsorbent in the pretreater is regenerated through the high-temperature steam of the power plant, regenerative desorbed gas generated by the operation system coolsthe pretreater and then is fed to a boiler of the power plant to be subjected to blending combustion, the regeneration cost is saved, and waste heat of the power plant and the waste regenerative desorbed gas are utilized in a mode of turning waste into wealth.

Description

technical field [0001] The invention relates to the field of activated carbon adsorbent regeneration, in particular to a hydrogen production adsorbent regeneration process. Background technique [0002] The temperature swing adsorption pretreatment process of oxygen-containing hydrogen from raw coal gas refers to the selective adsorption of organic impurities such as tar and naphthalene in raw coal gas through physical adsorption in a pretreatment tower filled with activated carbon adsorbents. [0003] According to the actual production and operation experience, after about half a year of use, the activity of activated carbon adsorbent will be significantly exhausted, and the adsorption efficiency will drop significantly. The regeneration temperature under the operating condition of 150 ° C cannot achieve a good regeneration effect. For this reason, the only option is to replace the activated carbon adsorbent or entrust an external unit to regenerate it. However, it takes a ...

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Problems solved by technology

[0003] According to the actual production and operation experience, after about half a year of use, the activity of activated carbon adsorbent will be significantly exhausted, and the adsorption efficiency will drop significantly. The regeneration temperature under the operating condition of 150°C cannot achieve a good regeneration effect.

For this reason, the only option is to replace the activated carbon adsorbent or entrust an external unit to regenerate it. However, it takes a long time to replace the adsorbent, and the use of anaerobic reinstallation in the tower for the adsorbent filling has a high safety risk, and the high cost of outsourced regeneration leads to disadvantages such as hydrogen production. very costly

[0004] In view of this, it is necessary to use the existing resources in the plant area to develop a hydrogen production adsorbent regeneration process to solve the problem of activated carbon adsorbent regeneration

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