Experimental study on treatment technique of reverse osmosis drainage with high salt content in a power plant was conducted.The vapour compression distillation combined with single effect vertical tube evaporation technology was selected.The results showed that

when several compounds were added into the drainage water

like the solid calcium sulfate

solid brine mixture evaporated and crystallized from the reverse osmosis water and the TPRI-1-3bittern stabilizing agent

by keeping the pH of drainage water within the range from 5.0to 6.0

a turbid liquid with excellent stability and fluidity could be formed during the evaporation and crystallization of the reverse osmosis water.After evaporation

the formed recrystallization mixture had a loose structure and was easily crushed

which can be recycled.