Boiling liquefied gas

Details Boiling liquefied gas Boiling liquefied gas

F - Mech Eng,Light,Heat,Weapons

25

J

F25J 3/04 (2006.01) B01D 5/00 (2006.01) F25J 3/00 (2006.01) F28D 9/00 (2006.01) F28F 13/18 (2006.01)

Patent

CA 2048254

MW/JLB/90B126 ABSTRACT BOILING LIQUEFIED GAS In a double rectification column 2 for separating air, liquid oxygen from a lower pressure rectification column 6 is collected in a tank 25 and flows out of the tank 25 under gravity and passes downwardly through a heat exchanger or condenser-reboiler 16 in which falling films of the liquid oxygen are reboiled by heat exchange with condensing nitrogen vapour from a higher pressure rectification column 4. Unboiled liquid oxygen flows out of the bottom condenser-reboiler 16 and falls into a volume 66 of liquid oxygen in a sump 68 of the lower pressure rectification column 6. Heat exchangers 70 and 72 are partially immersed in the volume 66 of liquid oxygen and boil thermosiphoning liquid oxygen by heat exchange with condensing nitrogen vapour.

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