Falling-film process for the cocurrent evaporation of a solution

Details Falling-film process for the cocurrent evaporation of a solution Falling-film process for the cocurrent evaporation of a solution

1986-03-06

1988-05-31

Bashore, S. Leon

Distillation: processes, separatory

Filming of distilland for vaporization

159 131, 159 472, 159 49, 159DIG10, 202236, 165115, 564 73, B01D 122, B01D 300

Patent

active

047479159

ABSTRACT:
A falling-film process and apparatus for the cocurrent evaporation of a solution is disclosed. The process utilizes a tube-bundle heat exchanger in which the upper ends of the individual tubes of the tube-bundle are closed. Apertures, preferably in the form of slots, are formed adjacent the closed-end of the individual tubes. A liquid heel is maintained above the highest of said apertures and flows into the interior of the tubes through said apertures. Upon entering the tubes the liquid and any vapor released therefrom flows cocurrently in a downward direction. The vapors released from the liquid are recycled to a point above the liquid heel through conduit means separate from the individual tubes.

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