APPARATUS FOR AND METHOD OF REMOVING ACIDIC GAS FROM A GASEOUS STREAM AND REGENERATING AN ABSORBENT SOLUTION

摘要

An apparatus for and method of removing acidic gas from a gaseous stream and regenerating an aqueous solution allows for the recovery of waste heat of stripping steam and more economical regeneration of the aqueous solution. In at least one embodiment, one or more rich solvent bypasses combine with a rich solvent heat exchanger to recover waste heat. In another embodiment, the apparatus and method include one or more rich solvent bypasses and a heater positioned upstream of the stripper to more economically regenerate an aqueous solution.

主权项

1. An apparatus comprising:
a stripper including at least one inlet for receiving a rich solvent to be regenerated, a first outlet for releasing lean solvent, and a second outlet for releasing vapor containing stripped acidic gas; a first flow path delivering at least some of the rich solvent to the inlet of the stripper; a second flow path removing at least some of the lean solvent from the first outlet of the stripper; at least one heat exchanger connecting the first flow path to the second flow path, the heat exchanger permitting heat transfer between the rich solvent and the lean solvent; at least one heater positioned in the first flow path, the heater being upstream of the stripper and downstream of the heat exchanger; and at least one bypass connecting an upstream location in the first flow path to at least one of a rich solvent heat exchanger and a predetermined point on the stripper.