Absorption liquid regeneration apparatus, COSub2 /Subrecovery apparatus including the same, and absorption liquid regeneration method

摘要

An absorption liquid regeneration apparatus includes: a regeneration tower for regenerating a CO2 absorption liquid; a reflux water drum configured to separate released gas from the regeneration tower into CO2 gas and condensed water, and return the condensed water to the regeneration tower; and a cleaning part installed in a gas-phase part of the reflux water drum or in a CO2 flow passage through which the CO2 gas having flowed from the gas-phase part flows, and configured to remove a CO2 absorption agent contained in the CO2 gas by using a cleaning liquid. The cleaning liquid has a lower concentration of the CO2 absorption agent than the condensed water stored in a liquid-phase part of the reflux water drum.