SELECTIVE SEPARATION AND CONCENTRATION SYSTEM FOR WATER SOLUBLE SALTS

摘要

A direct contact liquid concentrator selectively separates and concentrates water soluble salts from a wastewater stream containing two or more water soluble salts by concentrating the wastewater stream until the concentrated wastewater stream approaches or reaches a saturation level of the first water soluble salt; delivering the concentrated wastewater to a first settling tank, where the first water soluble salt begins to precipitate out of solution in solid form; drawing a first liquid solution from the first settling tank and sending the liquid solution to a second settling tank; and drawing a second liquid solution from the second settling tank, the second liquid solution having a higher ratio of a second water soluble salt to the first water soluble salt than the first liquid solution.

主权项

1. A selective separation and concentration system for water soluble salts, the system comprising:
a holding tank for containing a feed liquid that includes at least two water soluble salts dissolved therein in a first concentration ratio; a liquid concentrator, the liquid concentrator evaporating a portion of the feed liquid, thereby concentrating the dissolved salts while maintaining the first concentration ratio; a first partially concentrated feed line adapted to extract partially concentrated feed liquid from the concentrator, a first settling tank connected to the first partially concentrated feed line, the first settling tank being adapted to hold a volume of partially concentrated feed liquid; a second partially concentrated feed line connected to the first settling tank and adapted to extract partially concentrated feed liquid from the first settling tank; a second settling tank connected to the second partially concentrated feed line, the second settling tank being adapted to hold a volume of partially concentrated feed liquid; and a return line fluidly connected to the second settling tank and to the concentrator, the return line being adapted to return partially concentrated feed liquid to the concentrator.