Patent ID: 6800120
Filing Date: 2004-10-05
Classification: B01D,Y02C

Abstract:
A recovery plant that recovers a gaseous component from a process gas having a pressure of between about 2 psig and less than 20 psia, comprising:an absorber employing a lean solvent and a semi-lean solvent that absorb the gaseous component from the process gas, thereby producing a rich solvent, a semi-rich solvent, and a lean process gas, wherein both of the lean solvent and the semi-lean solvent are produced by a regenerator; wherein the regenerator is fluidly coupled to the absorber, wherein the regenerator receives at least part of the rich solvent and extracts the gaseous component from the rich solvent, thereby regenerating the lean solvent and the semi-lean solvent; a solvent flow control element, fluidly coupled to the absorber, that combines at least part of the semi-rich solvent with at least part of the semi-lean solvent to form a mixed solvent; an optional cooler fluidly coupled to the absorber, the cooler cooling the mixed solvent; and a connecting element that feeds the cooled mixed solvent into the absorber.