F - Mech Eng,Light,Heat,Weapons – 25 – J
Patent
F - Mech Eng,Light,Heat,Weapons
25
J
F25J 3/04 (2006.01)
Patent
CA 2323330
A double column air separation method in which a first stream of compressed air is cooled by passage through a main heat exchanger 6 from its warm end 8 countercurrently to a nitrogen stream withdrawn from the top of a lower pressure rectification column 22. The first stream of compressed air flows from the main heat exchanger 6 into a higher pressure rectification column 20 through and inlet 21. A second stream of compressed air is also passed into the warm end 8 of the main heat exchanger 6 and is cooled therein. The second stream of compressed air passes out of heat exchange with the nitrogen stream at a temperature lower than the exit temperature therefrom of the first stream of compressed air and at least 5K lower than the bubble point temperature of air at the pressure prevailing at the inlet 21. A stream of oxygen-enriched liquid passes isenthalpically from the bottom of the higher pressure column 20 to the lower pressure column 22.
Gowling Lafleur Henderson Llp
The Boc Group Plc
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