Patent ID: 6574962
Filing Date: 2003-06-10
Classification: F23C,F23J,F23L,Y02E

Abstract:
A process, KOH flue gas recirculation power plant with waste heat and byproduct recovery, comprising:(a) at least an air separation unit; (b) a combustion furnace burning a fuel stream; (c) a combustion flue gas stream generated from said combustion furnace; (d) a superheated steam production and heat recovery system recovering heat from said combustion flue gas stream from said combustion furnace; (e) a combustion flue gas manifold splitting said combustion flue gas stream from said superheated steam production and heat recovery system into a combustion flue gas stream A and a combustion flue gas stream B, wherein said combustion flue gas stream A flowing from said combustion flue gas manifold to said combustion furnace for combustion temperature control; (f) a fly ash and acid gas removal system removing fly ash and acidic material found in said combustion flue gas stream B from said combustion flue gas manifold; (g) a condensation process and byproduct recovery system removing any condensable material found in said combustion flue gas stream B from said fly ash and acid gas removal system; (h) an oxygen-enriched stream manifold combining an oxygen-enriched stream from said air separation unit and said combustion flue gas stream B from said condensation process and byproduct recovery system to form a combined oxygen-enriched stream, wherein said combined oxygen-enriched stream flowing through said condensation process and byproduct recovery system and entering said combustion furnace for combusting said fuel stream and said combustion flue gas stream A; (i) a first flue gas recirculation loop comprising said combustion flue gas stream from said combustion furnace to said superheated steam production and heat recovery system, said combustion flue gas stream from said superheated steam production and heat recovery system to said combustion flue gas manifold, and said combustion flue gas stream A from said combustion flue gas manifold to said combustion furnace; and (j) a second flue gas recirculation loop comprising said combustion flue gas stream from said combustion furnace to said superheated steam production and heat recovery system, said combustion flue gas stream from said superheated steam production and heat recovery system to said combustion flue gas manifold, said combustion flue gas stream B from said combustion flue gas manifold flowing through said fly ash and acid gas removal system and said condensation process and byproduct recovery system and entering said oxygen-enriched stream manifold, and said combined oxygen-enriched stream from said oxygen-enriched stream manifold flowing through said condensation process and byproduct recovery system and entering said combustion furnace.