CO2 RECOVERY DEVICE AND CO2 RECOVERY METHOD

摘要

The CO 2 recovery apparatus is provided with a CO 2 absorption portion 13A for absorbing CO 2 in a CO 2 -containing exhaust gas 11A by a CO 2 absorbing liquid 12, a water washing portion 13B provided on the upper portion side of the CO 2 absorption portion 13A so as to cool a CO 2 -removed exhaust gas and also recover the accompanying CO 2 absorbing liquid 12, a washing liquid circulation line L 1 for directly circulating a washing liquid 20 containing the CO 2 absorbing liquid 12 recovered in the water washing portion 13B from the top of the water washing portion 13B, an extraction line L 2 for extracting part of the washing liquid 20 containing the CO 2 absorbing liquid 12 as an extracted liquid 21 from the washing liquid circulation line L 1 , a concentration portion 22 for separating a gas component (water vapor) 24 from the extracted liquid 21 while concentrating the CO 2 absorbing liquid, and a concentrated liquid feed line L 3 for feeding a concentrated liquid 23 concentrated in the concentration portion 22 to the side of an absorbing liquid regeneration tower 14.