Patent ID: 8963347
Filing Date: 2015-02-24
Classification: F01K,F22B,F23J,F23L,F25J,Y02E

Abstract:
1. A method for efficiently generating power from a turbine using nitrogen, comprising: providing a gas stream that includes nitrogen and oxygen; condensing at least a portion of the nitrogen in the gas stream to form liquid nitrogen and separated liquid nitrogen; separating at least a portion of the liquid nitrogen from the carbon dioxide and/or oxygen to produce a separated nitrogen-rich stream comprised of liquid nitrogen and a separated oxygen-rich stream; using the separated oxygen-rich stream in an oxy-fired hydrocarbon processing plant, gasifier or furnace to produce steam; pressurizing the separated nitrogen-rich stream comprised of liquid nitrogen to a pressure of at least 1.8 atmosphere; heating the pressurized nitrogen-rich stream in a heat exchanger using a portion of the steam and further heating the nitrogen-rich stream from the heat exchanger in a furnace to form a heated nitrogen-rich stream comprised of gaseous nitrogen and having a temperature greater than 100° C.; and expanding the heated, separated nitrogen-rich stream in a turbine to produce power.