Patent ID: 7665291
Filing Date: 2010-02-23
Classification: F02C,F05D,Y02E

Abstract:
1. An integrated gasification power plant including: a heat recovery unit comprising a heat exchanger for recovering heat from produced gaseous fuel, in advance of gaseous fuel purification with a gaseous fuel purifier to produce clean fuel gas, by elevating the temperature of the produced clean fuel gas through heat exchange with the gaseous fuel, a compressor for elevating the pressure of said clean fuel gas upstream of the heat exchanger to a pressure greater than a pressure of the gaseous fuel in the heat exchanger such that, in the heat exchanger, the clean gas is always at a higher pressure than the gaseous fuel, a flow path being defined for feeding the pressurized clean fuel gas directly from the compressor to the heat exchanger without any intervening mechanical structure, so that the pressurized clean fuel gas that flows into the heat exchanger is always at a higher pressure than the gaseous fuel in the heat exchanger, and a clean fuel gas expander downstream of the heat recovery unit for recovering pressure energy from the pressurized and heated clean fuel gas upstream of the power plant.