Plate evaporator

Details Plate evaporator Plate evaporator

B - Operations, Transporting

01

D

161/10

B01D 1/22 (2006.01) F28F 3/08 (2006.01)

Patent

CA 1189439

ABSTRACT OF THE DISCLOSURE A plate evaporator of the rising film type and/or the falling film type comprises several heat exchange plates essentially vertically arranged in spaced face-to-face relationship to define evaporation passages alternating with heating medium passages. Evaporation passages with in- creasing cross-sectioned area and decreasing perimeter in the flow direction of the feed liquid are formed by pro- viding adjacent plates encompassing one evaporation passage with bulges (for example, ridges) which bulges, compared with imaginary planar plates, entail reduced volume of the evaporation passages. The size of said bulges (that is, the volume-reducing effect of said bulges) is gradually reduced in the flow direction of the medium to be evaporated. Thus, the cross-sectional area of the evaporation passages is increased while their perimeter is reduced in said direction.

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