Patent ID: 8075740

Claim:
A system for treating feedwater comprising: a fluidized bed heat exchanger unit connected to receive feedwater; means for pre-concentrating feedwater received by said fluidized bed heat exchanger unit; a flash concentrator column connected to receive feedwater discharged from said fluidized bed heat exchanger unit, said flash concentrator column including a first inlet for receiving feedwater from said means for pre-concentrating, a second inlet for receiving feedwater discharged from said fluidized bed heat exchanger unit, a first outlet for discharging vapor, a second outlet for discharging feedwater, and a third outlet for discharging a solids/liquid slurry, wherein said fluidized bed heat exchanger unit includes an inlet for receiving feedwater discharged from said second outlet of said flash concentrator column and an outlet for discharging heated feedwater; a spray dryer connected to receive said solids/liquid slurry discharged from said flash concentrator column, and a flash device located between said outlet of said fluidized bed heat exchanger unit and said second inlet of said flash concentrator column.