Advanced integration for improved integrated gasification combined cycle efficiency
AssigneeSiemens Power Generation, Inc.
InventorsMichael Briesch, Philip Deen, Terrence Sullivan
Life of this patent
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Abstract
A system and method for increasing the efficiency and/or power produced by an integrated gasification combined cycle system by increasing the integration between the air separation unit island of the integrated gasification combined cycle system and the remainder of the system. By integrating one or more of the nitrogen and oxygen gas product streams from the air separation unit in the remainder of the integrated gasification combined cycle system, heat may be utilized that helps to increase the efficiency of the combustion reaction and/or the gasification reaction used to produce the syngas utilized in the system.
Claims15
A method for increasing efficiency of an integrated gasification combined cycle system comprising the steps of:
- producing a nitrogen gas product stream and an oxygen gas product stream using an air separation unit;
- feeding the oxygen gas product stream to a gasifier;
- producing a syngas stream in the gasifier using the oxygen gas product stream and coal;
- and
- heating at least a portion of at least one of the nitrogen gas product stream, the oxygen gas product, or both using the syngas stream.
A system for increasing efficiency of an integrated gasification combined cycle system comprising:
- an air separation unit for producing a nitrogen gas product stream and an oxygen gas product stream;
- a gasifier for producing a syngas stream in the gasifier using the oxygen gas product stream and coal;
- and
- a syngas cooler for cooling the syngas using at least a portion of at least one of the nitrogen gas product stream, the oxygen gas product, or both.
A method for increasing power generated by an integrated gasification combined cycle system comprising the steps of:
- producing a nitrogen gas product stream and an oxygen gas product stream using an air separation unit;
- feeding the oxygen gas product stream to a gasifier;
- producing a syngas stream in the gasifier using the oxygen gas product stream and coal;
- and
- expanding at least a portion of the nitrogen gas product stream apart from the syngas stream using a turbine to produce power.
Dependencies are inferred from the claim text.