Patent ID: 8715379
Filing Date: 2014-05-06
Classification: F01K,F02C,F25J,Y02E,Y02P

Abstract:
1. A system for increasing efficiency of an integrated gasification combined cycle system comprising: a feedstock source; an air separation unit configured to produce a nitrogen gas product stream and an oxygen gas product stream; a gasifier in fluid communication with the air separation unit and the feedstock source configured to produce a syngas stream in the gasifier using the oxygen gas product stream and feedstock; a mixing valve in fluid communication with the gasifier and air separation unit configured to form a fuel mixture stream using the syngas stream and at least a portion of the nitrogen gas product stream; a heated regenerative steam generator in fluid communication with the air separation unit and/or gasifier configured to provide heat to at least one of the oxygen gas product stream, the fuel mixture stream, or both; a heat exchanger in thermal communication with the heated regenerative steam generator configured to heat the nitrogen gas product stream using heat from the heated regenerative steam generator; and a heat exchanger downstream of the mixing valve and in fluid communication with the air separation unit configured to heat the fuel mixture stream using the heated nitrogen gas product stream.