Heat exchange method and apparatus

Details Heat exchange method and apparatus Heat exchange method and apparatus

1998-03-16

1999-07-20

Capossela, Ronald

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

62903, F25J 100

Patent

active

059243082

ABSTRACT:
A heat exchange apparatus, typically for use in association with a double rectification column for the separation of air, has a downflow reboiler with boiling passages. In addition, there is a condenser in a position at a higher elevation than the reboiler. The condenser is fed with liquefied gas to be reboiled from the sump of a lower pressure column forming part of the double rectification column. A first conduit feeds the liquefied gas under gravity to the reboiler. The feeding of the condenser is effected by a vapor lift pump comprising a second conduit and an expansion valve disposed therein. Some of the liquefied gas is vaporized by passage through the expansion valve, and this vapor provides the vapor lifting pumping effect. The vapor is recondensed in the condenser.

REFERENCES:
patent: 4599097 (1986-07-01), Petit et al.
patent: 4606745 (1986-08-01), Fujita
patent: 5071458 (1991-12-01), Grenier et al.
patent: 5337569 (1994-08-01), Darredeau
patent: 5537840 (1996-07-01), Srinivasan
patent: 5724834 (1998-03-01), Srinivasan et al.

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