Patent ID: 9021810
Filing Date: 2015-05-05
Classification: F01K,Y02C,Y02E

Abstract:
1. A power plant comprising: a boiler configured to receive fuel, feed-water, and an air stream, to combust the fuel, vaporizing the feed-water into steam, and to discharge a flue gas that includes carbon dioxide; a steam turbine configured to receive the steam wherein the steam drives a load and said steam turbine discharges spent steam; and a post-combustion processing system configured to process the flue gas and including: a carbon dioxide scrubber for receiving the flue gas and contacting the flue gas with a reagent that absorbs carbon dioxide to form a spent absorbent reagent, a primary stripper for receiving the spent absorbent reagent and stripping at least a portion of the carbon dioxide from the spent absorbent reagent to form a first regenerated reagent; and a secondary stripper for receiving the first regenerated reagent and stripping at least a portion of the carbon dioxide from the first regenerated reagent to form a second regenerated reagent, said secondary stripper having a first line to return the second regenerated reagent to the carbon dioxide scrubber to be recycled as the reagent, and a second line to return at least a portion of the carbon dioxide stripped from the first regenerated reagent to the air stream being received by said boiler; wherein the secondary stripper is configured to receive ambient air of the power plant for contacting the first regenerated reagent with the ambient air, thereby stripping at least a portion of the carbon dioxide from the first regenerated reagent.