Process and equipment for removing CO2 in flue gas by utilizing amine solid adsorbent

Abstract

The invention belongs to the technical field of separation of CO2 in flue gas discharged during s combustion process, and in particular relates to a process and equipment for removing CO2 in flue gas by utilizing an amine solid adsorbent. In the process, the CO2 gas in the flue gas is fully contacted with the amine solid adsorbent so that CO2 gas molecules are rapidly diffused into pores of the solid adsorbent to react with amine liquids in the pores and then the CO2 is rapidly adsorbed by the adsorbent, and meanwhile the amine solid adsorbent adsorbed with the CO2 is regenerated by utilizing one or more regeneration methods such as thermal regeneration, vacuum regeneration, steam regeneration, amine steam regeneration and gas introduction regeneration. The adopted main equipment consists of a CO2 absorption reactor using the amine solid adsorbent, a regeneration reactor, a gas-solid separator, a gas-liquid separator and the like. The process and equipment provided by the invention have the advantages of simple and compact overall design, low investment and operating cost, stable and reliable operating performance and capability of efficiently separating the CO2 in the flue gas with low cost.

Description

technical field [0001] The present invention relates to CO in the flue gas emitted by combustion 2 The technical field of separation and treatment, specifically referring to the use of amine solid adsorbents to remove CO in flue gas 2 process and equipment. Background technique [0002] The increasing greenhouse gas emissions caused by the extensive use of fossil fuels has caused many major disasters around the world. my country's current CO 2 Emissions rank second in the world and are still growing rapidly. my country will inevitably become the focus of global compliance, and the international pressure it will bear will increase. The current mainstream traditional CO 2 The separation technologies are the liquid physical absorption method before combustion, the liquid chemical absorption method after combustion, and the oxygen separation method of cryogenic air separation. 2 / CO 2 Combustion, although these technologies are relatively mature and can be put into use in ...

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Problems solved by technology

[0005] It can be seen from the content of the above-mentioned patent that the above-mentioned technical scheme is mainly aimed at the preparation of amine solid adsorbents, mainly involves how to prepare solid adsorbent materials, and does not involve how to treat CO in flue gas. 2 The process and equipment for removal, especially the lack of research on how to effectively regenerate amine solid adsorbents

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