Method for regenerating ammonia water after capturing carbon dioxide with ammonia water and method for capturing carbon dioxide with ammonia water

摘要

A method for regenerating ammonia water after capturing carbon dioxide with aqueous ammonia includes steps as follow. An ammonia water regenerating system is provided, wherein the ammonia water regenerating system includes a heat exchanger, a stripper, a second pump, a first flash drum, a first compressor, a second flash drum and a second compressor. A first flashing step is performed, wherein the rich solvent is flashed to form a first steam and a first flash liquid. A first compressing step is performed, wherein the first steam is compressed. A stripping step is performed, wherein the first flash liquid is stripped. A second flashing step is performed, wherein the lean solvent is flashed to form a second steam and a second flash liquid. A second compressing step is performed, wherein the second steam is compressed.