Patent ID: 8808429
Filing Date: 2014-08-19
Classification: B01D,Y02C

Abstract:
1. A method for reclaiming one or more CO 2 absorbing chemical(s) from a lean aqueous CO 2 absorbent leaving a regeneration column in which CO 2 has been released, or desorbed, from the lean aqueous CO 2 absorbent, and the released CO 2 is withdrawn from a top of a regeneration column for further treatment, and the lean aqueous CO 2 absorbent, or CO 2 depleted absorbent, is collected at a bottom of the regeneration column and withdrawn therefrom, where at least a part of the lean aqueous CO 2 absorbent leaving the regeneration column is introduced into a reboiler where the lean aqueous CO 2 absorbent is heated to generate steam and vaporized absorbent that is introduced into the regeneration column as stripping gas, where the lean aqueous CO 2 absorbent is withdrawn and is returned to an absorption column, and where a part of the lean aqueous CO 2 absorbent is withdrawn and introduced into a reclaimer in which the lean aqueous CO 2 absorbent is boiled to generate a gas phase that is withdrawn and returned into the regeneration column as reclaimed absorbent, and a liquid phase containing impurities, heat stable salts, and degradation products from absorbing chemical(s) and other chemicals that are withdrawn from the reclaimer for deposition, wherein the lean aqueous CO 2 absorbent withdrawn from the regeneration column is flashed to generate a vapour that is compressed and returned into the regeneration column as stripper gas, and a liquid phase that is returned to the absorption column, where the gaseous phase that is withdrawn from the reclaimer is compressed together with a vapour part from flashing of the lean absorbent, to generate a pressure in the reclaimer that is lower than a pressure in the regeneration column.