Heat exchanger and double distillation column

Distillation: apparatus – Apparatus – Systems

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165166, 62643, B01D 302

Patent

active

056676433

ABSTRACT:
A heat exchanger is provided which is suitable for use as a condenser/reboiler in a double distillation column. The heat exchanger has alternating first and second passages and a reservoir located above the first and second passages for receiving a first fluid and for containing a froth. A series of orifices can be provided by a distributor tray to provide flow communication between the reservoir and the first passages to allow at least a liquid phase of the froth to weep into the first passages and to be partly vaporized through indirect heat exchange with a second fluid flowing through the second passages. The partial vaporization produces a vapor phase of the froth which can at least in part escape from the orifices and interact with the first fluid to thereby form the froth. A remaining part of the liquid phase, not vaporized through the indirect heat exchange, is discharged from the bottom of the first passages into a sump. The weeping inlet of the liquid phase into the first passages allows for the automatic replenishment of the first passages due to flow mal-distribution.

REFERENCES:
patent: Re33026 (1989-08-01), Petit et al.
patent: 3992168 (1976-11-01), Toyama et al.
patent: 4372818 (1983-02-01), Kaganovsy et al.
patent: 4599097 (1986-07-01), Petit et al.
patent: 5354428 (1994-10-01), Clark et al.

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