PRESSURE-EXCHANGE ASSISTED CLOSED CIRCUIT DESALINATION SYSTEMS FOR CONTINUOUS DESALINATION OF LOW ENERGY AND HIGH RECOVERY UNDER FIXED FLOW AND VARIABLE PRESSURE CONDITIONS

摘要

The inventive system and method comprises one or more batch dosed circuit desalination (CCD) unit(s) linked by conducting lines and valves means to a pressure exchange (PE) means, such that each said CCD can be engaged periodically with said PE means for brine replacement by fresh pressurized feed, thereby, enable a continuous consecutive sequential batch desalination under fixed How and variable pressure conditions of low energy and high recovery of unchanged flux. The inventive system and method opens the door to large scale CCD systems operated by predetermined fixed set points of pressurized feed flow, cross-flow or module recovery, and system recovery, independent of each other, of infinite operational combinations and high flexibility for elective process optimization. The inventive system and method overcome former volume requirement limitations of large scale SWRO CCD installations.