Method for improved efficiency for IGCC
OwnerWilliam C. Pfefferleinventor
Life of this patent
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Abstract
The invention provides a method for operating an oxygen blown integrated coal gasification combined cycle gas turbine (IGCC) system having a gasifier and an air separation unit. A supply of low pressure nitrogen is passed to a gas turbine compressor along with sufficient air to provide sufficient compressed air to the gas turbine combustor for gasified fuel combustion. Subsequently, at least a sufficient portion of the compressor discharge flow is passed to a combustor for combustion of the gasified fuel flow to the combustor. The gasified fuel is combusted to produce hot combustion gases and then the combustion gases are passed to a turbine.
Claims5
The method of operating an oxygen blown IGCC system having a fuel gasifier and an air separation unit comprising:
- a) obtaining a supply of low pressure nitrogen;
- b) passing the nitrogen to a gas turbine compressor along with sufficient air to provide sufficient compressed air to the gas turbine combustor for gasified fuel combustion;
- c) passing at least a sufficient portion of the compressor discharge flow to a combustor for combustion of the gasified fuel flow to the combustor;
- d) combusting the gasified fuel to produce hot combustion gases;
- and
- e) passing the combustion gases to a turbine.
Dependencies are inferred from the claim text.