Back to results
US 6,295,838 B1Granted
Cryogenic air separation and gas turbine integration using heated nitrogen
AssigneePraxair Technology, Inc.
InventorsMinish Mahendra Shah, Raymond Francis Drnevich, Nancy Jean Lynch, Kevin William Mahoney
Life of this patent
Estimating the term…
Abstract
An integrated cryogenic air separation gas turbine system wherein heat of compression within the feed air is provided to nitrogen produced in the cryogenic air separation plant and the heated nitrogen is provided to a gas turbine along with combustion reaction products to produce power.
Claims12
A method for operating a cryogenic air separation and gas turbine system comprising:
- (A) compressing feed air in a non-intercooled feed air compressor to produce compressed feed air having heat of compression, and cooling the compressed feed air;
- (B) passing the compressed feed air into a cryogenic air separation plant and producing nitrogen by the cryogenic rectification of the feed air within the cryogenic air separation plant;
- (C) withdrawing nitrogen from the cryogenic air separation plant and heating the withdrawn nitrogen by indirect heat exchange with the compressed feed air having heat of compression to produce heated nitrogen;
- (D) turboexpanding the heated nitrogen in a gas turbine;
- and
- (E) compressing air in a gas turbine compressor and passing at least some of the resulting compressed air into a combustor.
3 more elements
Cryogenic air separation and gas turbine apparatus comprising:
- (A) a non-intercooled feed air compressor, a high level heat exchanger, means for passing feed air to the feed air compressor, and means for passing feed air from the feed air compressor to the high level heat exchanger;
- (B) a cryogenic air separation plant and means for passing feed air from the high level heat exchanger to the cryogenic air separation plant;
- (C) means for passing nitrogen from the cryogenic air separation plant to the high level heat exchanger;
- (D) a gas turbine and means for passing nitrogen from the high level heat exchanger to the gas turbine;
- and
- (E) a gas turbine compressor, a combustor, means for passing air to the gas turbine compressor, and means for passing air from the gas turbine compressor to the combustor.
3 more elements
Dependencies are inferred from the claim text.