Patent ID: 9440164
Filing Date: 2016-09-13
CPC Classification: B01D,C02F

Claim Text:
1. A method of treating waste water comprising the steps of: (a) receiving waste water at a first pressure between 11.8-17.6 psia and a first temperature between 48-72° F., the waste water comprising dissolved solids and volatile organic compounds; (b) pressurizing the received waste water to a second pressure between 120-180 psia; (c) preheating the pressurized waste water to a second temperature between 68-140° F., wherein said preheating step produces a distilled water and a pressurized/preheated waste water without boiling of the waste water across heat transfer surfaces; (d) heating the pressurized/preheated waste water to a third temperature between 286-430° F. to produce a pressurized/heated waste water without boiling of the waste water across heat transfer surfaces; (e) evaporating the pressurized/heated waste water in an evaporator to remove dissolved solids by evaporation caused by depressurization of the waste water to produce a first steam and a brine water, wherein the brine water has a total dissolved solids content greater than a total dissolved solids content of the received waste water; and (f) crystallizing the brine water to produce a solid mass of waste product and a second steam, wherein the second steam produced by step (f) is used as a heat source in at least one of steps (c) and (d), and wherein step (f) uses a plasma torch to crystallize the brine water.