Process for removing contaminants from an aqueous stream

摘要

The invention provides a process for removing contaminants from an aqueous stream comprising the steps of:
(a) providing the aqueous stream which comprises contaminants;
(b) subjecting the aqueous stream to a separation treatment in a separation unit to obtain a contaminants-rich first vapour fraction and a contaminants-lean first liquid fraction;
(c) subjecting at least part of the contaminants-rich first vapour fraction as obtained in step (b) to a first condensation treatment to obtain a second vapour fraction which comprises contaminants and a second liquid fraction which comprises contaminants;
(d) recovering at least part of the contaminants-lean first liquid fraction as obtained in step (b) from the separation unit; and
(e) recycling at least part of the second liquid fraction which comprises contaminants as obtained in step (c) to step (b).