Patent ID: 9688548
Date: 2017-06-27
CPC Classifications: B01D,C02F,Y02A,Y02W

Claim:
1. A process for desalinating water comprising the steps of: passing a feed stream of saline solution in a first desalination step through a reverse osmosis membrane desalination plant comprising at least one reverse osmosis desalination unit to form a first product water stream having a reduced salt concentration relative to that of the feed stream of saline solution and a first byproduct stream having an increased salt concentration relative to that of the feed stream of saline solution, wherein the first byproduct stream is passed in a second desalination step through a first suspension crystallization unit to form a second product water stream having a reduced salt concentration relative to that of the first byproduct stream and a second byproduct stream having an increased salt concentration relative to that of the first byproduct stream, wherein the second byproduct stream is passed in a third desalination step through a static crystallization unit to form a third product water stream having a reduced salt concentration relative to that of the second byproduct stream and a third byproduct stream having an increased salt concentration relative to that of the second byproduct stream, and wherein the salt concentration of the first byproduct stream is between about 3 to about 7 weight %.