CO2 recovery system and CO2 recovery method

摘要

[Title of Document] Abstract [Abstract] [Object] To further reduce the concentrations of basic amine compounds remaining in decarbonated flue gas. [Means of Solution] A C02 recovery system includes an absorber 2 and a regenerator 3. The absorber 2 includes a C02 absorbing section 21 and a water-washing section 22. The C02 absorbing section 21 allows flue gas 101 to come into contact with a basic amine compound absorbent 103 so that the basic amine compound absorbent 103 absorbs CO 2 in the flue gas 101. The water-washing section 22 allows the decarbonated flue gas 101A in which the amount of C02 has been reduced in the C02 absorbing section 21 to come into contact with circulating wash water 104 and to be washed with the wash water 104 so that the amounts of the basic amine compounds entrained in the decarbonated flue gas 101A are reduced. The regenerator 3 releases C02 from the basic amine compound absorbent 103 the C02 absorbed therein. The C02 recovery system further includes a concentrating unit 24 for concentrating the wash water 104 from the water-washing section 22. Condensed water generated during concentration is returned to the water-washing section 22. [Representative Drawing] Fig. 1 -0 a) 0 0c m0 C)/ L)U<