CO2 RECOVERY APPARATUS AND CO2 RECOVERY METHOD

摘要

The present invention is a CO2 recovery device provided with: a CO2 absorption tower (13) that contacts a CO2-containing exhaust gas (11A) to a CO2-absorbing liquid (12), eliminating the CO2 and resulting in purified exhaust gas (11B); and an absorbing liquid regeneration tower (14) that separates the CO2 from the CO2-absorbing liquid to regenerate the CO2-absorbing liquid (12); and the lean solution (12B) from which the CO2 has been eliminated in the absorbing liquid regeneration tower (14) is reused at the CO2 absorption tower (13). A cooling tower (70) that cools the CO2-containing exhaust gas that contains CO2 is provided to the upstream side of the CO2 absorption tower (13); the temperature (T2) of the purified exhaust gas (11B) discharged from the CO2­ absorption tower is set lower (T1 > T2) than the temperature (T1) of the CO2-containing exhaust gas (11A) containing CO2 and cooled at the cooling tower; and the condensed water (44) resulting from condensing water vapor discharged from the absorbing liquid regeneration tower (14) is vaporized at an evaporator (90).