F - Mech Eng,Light,Heat,Weapons – 25 – J
Patent
F - Mech Eng,Light,Heat,Weapons
25
J
162/120
F25J 3/04 (2006.01)
Patent
CA 1217710
ABSTRACT A plant for producing gaseous nitrogen, which plant comprises a heat exchanger (6) for cooling feed air, a distillation column (8) for receiving at least part of said feed air, a vessel (21), a reflux condenser (12) disposed in said vessel (21) and arranged to receive, in use, vapour from said distillation column (8) and return liquid reflux thereto, a line (18,20) connecting the lower portion of said distillation column (8) to said vessel (21) and having an expansion valve (19) mounted therein, a line (14) for withdrawing nitrogen product from said distillation column (8) and bringing said nitrogen product into heat exchange with said feed air, a crude liquid oxygen (LOX) storage tank (27) communicating with said vessel (21), a liquid nitrogen (LIN) storage tank (34) communicating with said distillation column (8), a line (22) for conveying waste gas from said vessel (21), means to warm said waste gas, an expander (24) to expand said waste gas, means to control the flow of waste gas through said expander, and means to effect heat exchange between, the expanded waste gas and the feed air.
438245
Air Products And Chemicals Inc.
Mcfadden Fincham
LandOfFree
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