公开(公告)号：WO2021174344A1

公开(公告)日：2021-09-10

申请号：PCT/CA2021/050259

申请日：2021-03-01

Applicant: SALTWORKS TECHNOLOGIES INC.

Inventor： SPARROW, Benjamin ,  LOW, Megan

IPC: C01D7/24 ,  B01D9/02 ,  C01D5/16 ,  C01D7/22 ,  C02F1/44 ,  C02F1/52 ,  C02F9/10

Abstract: Zero liquid discharge systems, processes, and techniques for treating a saltwater without evaporative crystallization. The saltwater is treated by a fluidic circuit comprising a high-pressure reverse osmosis ("HPRO") unit configured to operate at a hydraulic pressure of at least 1,500 psi, a cooling crystallizer, and a solids-liquid separator. The saltwater is first concentrated by the HPRO unit to produce an HPRO brine, which is subsequently cooled to a designated crystallization temperature by the cooling crystallizer. The cooling crystallizer crystallizes salt crystals from the cooled HPRO brine and produces a salt-diminished brine. The solids-liquid separator separates the salt-diminished brine from the salt crystals. The salt-diminished brine from the solids-liquid separator is returned to the HPRO unit for further treatment, which allows additional salts to be crystallized from the returned salt-diminished brine.