Asme ptc 47 - igcc performance testing: air separation issues

摘要

Air separation units have been incorporated into the designs of may gasification combined cycle projects worldwide for the supply of pressurized oxygen and nitrogen. Pressurized gaseous oxygen at a purity usually above 95percent by volume is supplied to the gasification unit to partialy oxidize a hydrocabon feed to yield syngas. Nitrogen streams are used for purging and inerting purposes or for the pressurized transport of dry fuels for injection into the gasification reactor. Several facilities have incorporated "integration" of air and/or nitrogen streams between the gas turbine and the air separation unit to improve overall facility cost, power output and efficiency. Gasification processes that are based on air as the oxidant source may also require an air separation unit to supply pressurized nitrogen for inerting and dry fuel transport. This paper reports on the progress of PTC 47's air separation subcommittee in defining test measurement boundaries and perofrmance parameter definitions for the testing of an air separation unit as a subsystem of the gasification combined cycle facility.