Integrated air separation plant and power generation system

摘要

In an air separation plant (1) integrated with another process, work is recovered from a nitrogen enriched stream (3) produced by an air separation process either by expanding the nitrogen enriched stream directly in a turbine (21,150) or by combustion of the nitrogen enriched stream with a fuel stream and expanding gas produced by the combustion. The work produced by the expansion is maximised by mixing the nitrogen enriched stream before the expansion step with a further gas stream (5,31) which may be air or may contain at least 2mol.% oxygen and/or at least 2mol.% argon and/or at least 10mol% carbon dioxide.