Patent ID: 9360251
Filing Date: 2016-06-07
CPC Classification: F25J

Claim Text:
1. An integrated method for separation of air and heating of an air gas produced by separation of air, the method comprising the steps of: compressing air in a compressor: cooling the air in a water preheating exchanger: feeding the air to an air separation device under conditions effective to separate the air in the air separation device to produce at least an oxygen enriched gas and a nitrogen enriched gas; introducing the oxygen enriched gas from the air separation device to an oxycombustion boiler; and heating either the nitrogen enriched gas or the oxygen enriched gas coming from the air separation device by indirect exchange of heat with liquid water in an air gas heat exchanger, wherein the air gas heat exchanger is in fluid communication with a hot water source selected from the group consisting of the water preheating exchanger, a water de-aerator, and combinations thereof, wherein the water preheating exchanger and the water de-aerator are in fluid communication with the oxycombustion boiler, such that the oxycombustion boiler is configured to receive a hot water stream originating from the deaerator and the water preheating exchanger is configured to receive a cold water stream originating from the oxycombustion boiler.