B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
161/31
B01D 1/00 (2006.01) B01D 1/14 (2006.01) B01D 1/28 (2006.01) B01D 3/06 (2006.01)
Patent
CA 1214719
Abstract The invention relates to a method for evaporation of a solution in a recompression evaporation plant. The solution (9) is evaporated first in known manner by indirect transfer of heat from the recompressed vapour (13) through condensation of said vapour in one or more evaporation units (1). After pre-evaporation in this fashion the solution (10) is finally evaporated by direct transfer of heat from the overheated vapour (8) which is obtained by recompression (6) of the vapour (15) formed in evaporation. According to the invention this final evaporation is achieved by mixing (7) the solution (10) in finely-divided form with the overheated vapour (8) and then after thermodynamic equilibrium between the vapour and liquid phases has been substantially attained separating (2) the solution (11) from the vapour (18). The solution (11) thereby obtained can be further evaporated without the addition of heat but with a reduction of pressure by means of conducting it to an expansion vessel (3) which is connected by a vapour line (20) to the suction line (15) of the compressor (6). (Figure 3)
436984
Fetherstonhaugh & Co.
Okono Oy
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