F - Mech Eng,Light,Heat,Weapons – 28 – B
Patent
F - Mech Eng,Light,Heat,Weapons
28
B
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F28B 7/00 (2006.01) F27D 99/00 (2010.01) B01D 5/00 (2006.01) F26B 21/14 (2006.01) F26B 25/00 (2006.01) F27D 17/00 (2006.01)
Patent
CA 1227709
DUAL VESSEL HEAT EXCHANGE SYSTEM ABSTRACT OF THE DISCLOSURE A vapor component of a gas mixture is separated by condensation and is recovered for further use. A solvent vapor mixed with inert gas is condensed in a multistage heat exchange system in a manner which utilizes a first refrigerant to condense a portion of the vapor in a first heat exchange device, a second refrigerant, typically cold inert gas, for condensing a further portion of the vapor in a second heat exchanger and a third heat exchange device wherein chilled liquid is utilized to condense a still further portion of the vapor. In a fourth heat exchange device, a cryogenic liquid is passed in heat exchange relation with the liquid passed thereto from the third heat exchange device. The cryogenic liquid is vaporized to form an essentially pure inert gas which is supplied to the vicinity of the oven exit and entrance, but exteriorly of the oven to form inert gas barriers. The fourth heat exchange device may effect direct or indirect heat exchange with the cryogenic liquid. By maintaining the vaporized inert gas separate from the inert gas separated from the condensed solvent vapor, a mass balance between gas flows in and out of the oven is readily maintained.
450846
Kearns Patrick J.
Mukerjee Ajit K.
Rieman Davis J.
Gowling Lafleur Henderson Llp
The Boc Group Inc.
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