Concentrating evaporators – Film type – Moving film
Patent
1991-05-14
1993-09-21
Manoharan, Virginia
Concentrating evaporators
Film type
Moving film
159 271, 159 274, 159 31, 159 431, 159 49, 165115, 202197, 202236, 202237, 203 89, B01D 122
Patent
active
052465411
ABSTRACT:
A falling film evaporator includes a chamber having a top and bottom tube plate; a plurality of vertical tubes each having an interior and exterior surface and extending through the chamber and being supported by the top and bottom tube plates; an inlet at the chamber for feeding heating medium into the chamber; a distributor above the tubes for feeding liquid to be evaporated into the tubes and for causing the liquid to be distributed as a falling film along the interior surface of the tubes so as to evaporate the liquid and generate vapor as the liquid passes in heat exchanging relationship with a heating medium present at the exterior surface of the tubes; a vapor space defined by a circumferential wall below the tubes; a plurality of vertically elongated spaced elements having a substantially U-shaped cross-section with inwardly pointing vertical edges for receiving the evaporated liquid and the vapor, the elements being arranged in a circumferential wall below the tubes within the vapor space spaced from the wall of the vapor space and including a conical bottom; a drainpipe in the bottom for discharging the separated liquid into the vapor space and outlets in the vapor space for separately discharging the vapor and the liquid therefrom.
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A. Ahlstrom Corporation
Manoharan Virginia
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