Method for use in recompression evaporation of a solution

Details Method for use in recompression evaporation of a solution Method for use in recompression evaporation of a solution

1983-09-20

1985-07-23

Kratz, Peter

Concentrating evaporators

Processes

159 473, 159 482, F26B 300

Patent

active

045307377

ABSTRACT:
The invention relates to a method for evaporation of a solution in a recompression evaporation plant. The solution is evaporated first in known manner by indirect transfer of heat from the recompressed vapor through condensation of said vapor in one or more evaporation units. After pre-evaporation in this fashion the solution is finally evaporated by direct transfer of heat from the overheated vapor which is obtained by recompression of the vapor formed in evaporation. According to the invention this final evaporation is achieved by mixing the solution in finely-divided form with the overheated vapor and then after thermodynamic equilibrium between the vapor and liquid phases has been substantially attained separating the solution from the vapor. The solution 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 which is connected by a vapor line to the suction line of the compressor.

REFERENCES:
patent: 2822038 (1958-02-01), Kennedy et al.
patent: 3290153 (1966-12-01), Bayne et al.
patent: 3396086 (1968-08-01), Starmer
patent: 3463216 (1969-08-01), Miles
patent: 3475281 (1969-10-01), Rosenblad
patent: 3514375 (1970-05-01), Dambrine
patent: 3635790 (1972-01-01), Heath
patent: 3661778 (1972-05-01), Pradt
patent: 4137129 (1979-01-01), Bjorklund
patent: 4284480 (1981-08-01), Sterlini
patent: 4303468 (1981-12-01), Lagvilharre et al.

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