THERMAL INTEGRATION OF OXYGEN PLANTS

摘要

A process for the integration of a cryogenic air separation plant and an oxy- combustion power plant is presented. This process also includes heating a pressurized nitrogen stream and a pressurized oxygen stream with a compressed air stream that is extracted from the air compressor of a cryogenic air separation plant, thereby forming a heated pressurized nitrogen stream and a heated pressurized oxygen stream. This process also includes burning a fuel stream with said heated pressurized oxygen stream to produce a flue gas stream, heating said heated pressurized nitrogen stream to form a hot pressurized nitrogen stream, then work expanding said hot pressurized nitrogen stream to a lower pressure thereby forming a hot exhaust nitrogen stream and recovering energy. And this process also includes heating said boiler feed water stream by indirect heat exchange with said hot exhaust nitrogen stream.