Patent ID: 6615589
Filing Date: 2003-09-09
Classification: F01K,Y02E

Abstract:
A process for generating power comprising:generating exothermically a first fuel gas; compressing an oxidant gas to produce compressed oxidant gas; combusting a second fuel gas in the presence of at least a portion of said compressed oxidant gas to produce combustion product gas, wherein the second fuel gas comprises at least a portion of the first fuel gas or a gas derived therefrom; expanding at least a portion of said combustion product gas to produce expanded combustion product gas; at least partially vaporizing pre-heated water by heat exchange against at least a portion of said first fuel gas to produce an at least partially vaporized water stream; heating said at least partially vaporized water stream by heat exchange against expanded combustion product gas to produce a heated first steam stream at a pressure of from 10 MPa (100 atm.) to 20 MPa (200 atm.); and expanding said heated first steam stream in the highest pressure stage of a steam turbine system having more than one pressure stage to generate power and an expanded steam stream.