Dry carbon dioxide capturing device with improved energy efficiency

Abstract

Disclosed is a dry COcapturing device with improved energy efficiency, which utilizes a difference in temperature between a regeneration operation of isolating COfrom an sorbent containing COabsorbed therein and a pre-treatment operation of allowing HO to be adsorbed to CO. The dry carbon dioxide (CO) capturing device, includes a recovery reactor for recovering CO, a recovery cyclone for discharging a gas while separating the CO-captured solid sorbent only, a regenerator for receiving the CO-captured solid sorbent and separating COcaptured in the solid sorbent, and a pre-treatment reactor for cooling the solid sorbent free from CO, wherein a first heat exchanger is provided between the recovery cyclone and the regenerator to pass the CO-captured solid sorbent therethrough, and a second heat exchanger is provided between the pre-treatment reactor and the regenerator to pass the solid sorbent free from COtherethrough. The first and second heat exchanger include a first and second heat exchange jacket mounted thereon which are connected to each other in a closed loop state.