Dry carbon dioxide capturing device with improved energy efficiency

摘要

Disclosed is a dry CO2 capturing device with improved energy efficiency, which utilizes a difference in temperature between a regeneration operation of isolating CO2 from an sorbent containing CO2 absorbed therein and a pre-treatment operation of allowing H2O to be adsorbed to CO2. The dry carbon dioxide (CO2) capturing device, includes a recovery reactor for recovering CO2, a recovery cyclone for discharging a gas while separating the CO2-captured solid sorbent only, a regenerator for receiving the CO2-captured solid sorbent and separating CO2 captured in the solid sorbent, and a pre-treatment reactor for cooling the solid sorbent free from CO2, wherein a first heat exchanger is provided between the recovery cyclone and the regenerator to pass the CO2-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 CO2 therethrough. 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.

主权项

1. A dry carbon dioxide (CO2) capturing device, comprising:
a recovery reactor to recover CO2 by contacting a solid sorbent with exhaust gas, which is fed from outside and contains CO2; a recovery cyclone connected to the recovery reactor to discharge a gas while separating the solid sorbent capturing CO2 (‘CO2-captured solid sorbent’) only; a regenerator connected to the recovery cyclone to receive the CO2-captured solid sorbent and separate CO2 captured in the solid sorbent through a fluidized gas; and a pre-treatment reactor connected to the regenerator to cool the solid sorbent free from CO2 and feedback the cooled solid sorbent to the recovery reactor, wherein a first heat exchanger is provided between the recovery cyclone and the regenerator to pass the CO2-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 CO2 therethrough, and wherein the first and second heat exchanger include a first and second heat exchange jacket mounted thereon, respectively, which are connected to each other through a loop pipe to form a closed loop enabling a heat transfer medium to flow therein.