SYSTEM FOR REMOVING MINERALS FROM A BRINE

摘要

A system includes an ion exchange softener fluidly coupled to a wastewater treatment system. The first ion exchange softener may receive a first brine stream from the wastewater treatment system and to remove a plurality of minerals from the first brine stream to generate a second brine stream including the plurality of minerals and a third brine stream. The system also includes a mineral removal system disposed downstream from the ion exchange softener and that may receive the second brine stream and to generate a sodium chloride (NaCl) brine stream and an acid and caustic production system disposed downstream from and fluidly coupled to the mineral removal system. The acid and caustic production system includes a first electrodialysis (ED) system that may receive the NaCl brine stream from the mineral removal system and to generate hydrochloric acid (HCl) and sodium hydroxide (NaOH) from the NaCl brine stream. The system also includes a second ED system disposed downstream from the ion exchange softener and upstream of the acid and caustic production system. The second ED system is fluidly coupled to the ion exchange softener and to the acid and caustic production system, and the second ED may generate desalinated water from the third brine stream and an ED concentrate stream. The second ED system may direct the ED concentrate stream to the acid and caustic production system.

主权项

1. A system, comprising:
an ion exchange softener fluidly coupled to a wastewater treatment system, wherein the first ion exchange softener is configured to receive a first brine stream from the wastewater treatment system and to remove a plurality of minerals from the first brine stream to generate a second brine stream comprising the plurality of minerals and a third brine stream; a mineral removal system disposed downstream from the ion exchange softener and configured to receive the second brine stream and to generate a sodium chloride (NaCl) brine stream; an acid and caustic production system disposed downstream from and fluidly coupled to the mineral removal system, wherein the acid and caustic production system comprises a first electrodialysis (ED) system configured to receive the NaCl brine stream from the mineral removal system and to generate hydrochloric acid (HCl) and sodium hydroxide (NaOH) from the NaCl brine stream; and a second ED system disposed downstream from the ion exchange softener and upstream of the acid and caustic production system, wherein the second ED system is fluidly coupled to the ion exchange softener and to the acid and caustic production system, and the second ED is configured to generate desalinated water from the third brine stream and an ED concentrate stream, wherein the second ED system is configured to direct the ED concentrate stream to the acid and caustic production system.