Carbon dioxide recovery apparatus and method

摘要

An apparatus for separating and recovering CO2 from a CO2 absorbent, includes: a regeneration tower for regenerating the absorbent that has absorbed CO2 by heating it to separate and remove CO2 therefrom and to exhaust CO2 gas; a compressor for compressing the CO2 gas exhausted from the tower; and a heat exchanger for heating the absorbent in the tower by exchanging heat with a part of the compressed CO2 by the compressor which is introduced into the tower. The apparatus may include a plurality of the compressors and a plurality of the heat exchangers. The plurality of compressors is arranged in series to sequentially compress the CO2 gas exhausted from the tower. The plurality of heat exchangers is configured so that each part of the CO2 compressed by the plurality of compressors is introduced to the tower in parallel to exchange heat with the absorbent in the tower.

主权项

1. An apparatus for separating and recovering CO2 from a CO2 absorbent that has absorbed CO2, comprising:
a regeneration tower for regenerating the CO2 absorbent that has absorbed CO2 by heating it to separate and remove CO2 therefrom and to exhaust CO2 gas; a compressor for compressing the CO2 gas exhausted from the regeneration tower to yield compressed CO2; a heat exchanger for heating the CO2 absorbent in the regeneration tower by executing heat exchange with a part of the compressed CO2 introduced into the regeneration tower; and a reboiler for heating a part of the CO2 absorbent extracted from a bottom portion of the regeneration tower, the reboiler being different from the heat exchanger, wherein the heat exchanger is located in the regeneration tower and has a shape of a gas pipe through which the compressed CO2 flows to exchange heat between the compressed CO2 and the absorbent flowing in an outer periphery of the gas pipe.