Patent ID: 8398758

Claim:
A CO 2 recovery system comprising: an absorber including a CO 2 absorbing section and a water-washing section, the CO 2 absorbing section allowing flue gas to come into contact with a basic amine compound absorbent so that the basic amine compound absorbent absorbs CO 2 in the flue gas, the water-washing section allowing the decarbonated flue gas from which CO 2 has been absorbed in the CO 2 absorbing section to come into contact with circulating wash water and to be washed with the wash water so that basic amine compounds entrained in the decarbonated flue gas are reduced in amount; a regenerator releasing the CO 2 from the basic amine compound absorbent containing the CO 2 absorbed into; and a concentrating unit for concentrating the wash water from the water-washing section, the concentrating unit returning condensed water generated during concentration to the water-washing section.