MULTI STAGE COLUMN DISTILLATION (MSCD) METHOD FOR OSMOTIC SOLUTE RECOVERY

摘要

A method and apparatus for separating draw solution solutes and product s olvent from a draw solution using a plurality of distillation columns. In on e embodiment, the draw solution is used in a Forward Osmosis (FO) water desa lination process. In this embodiment, the draw solution is directed to the p lurality of distillation columns in parallel while the energy stream (heat) is directed to the plurality of distillation columns in series such that the efficiency of heat use is improved and in turn the cost of the heat is redu ced.