MULTIPLE-CHAMBER DEVICE FOR FRACTIONATED EVAPORATION AND SEPARATION OF A SOLUTION

摘要

The invention concerns an evaporation device (10) of a liquid solution (SO) based on solvent and compounds or solutes inside an envelope (11, 111, 211), comprising various evaporation zones separated by separating partitions (14) into several distinct elementary chambers (12A, 12B, , 12N) enabling fractionated evaporation through outlets S1, S2, Sn generating a plurality of separate flows of vapour specific to each constituent. The solution (SO) is injected into the first chamber (12A) subjected to the lowest temperature T1, so as to impregnate a mobile porous element (16), which passes through the various partitions (14), while being successively in contact with said chambers heated at increasing temperatures T1, T2, , Tn. A neutral carrier gas (GV) is injected in the vicinity of the partitions (14) for controlling of pressure losses in the gas flows between the different chambers.