Against the features of industrial waste water in Shenhua Yili Energy Co.

Ltd.

the lime treatment combined with high efficient reverse osmosis technology was employed.The treated water was used for replenishment water of the auxiliary cooling system and the feed water.The process equipment system was introduced and operation economic analysis was conducted.The system operation showed that

the recovery rate of high efficient reverse osmosis was 90%

about 15% higher than that of the ordinary reverse osmosis

which can maximize the recovery of industrial waste water

making the water quality reach the requirement of reuse.Furthermore

the remaining 10%reverse osmosis water with high salt content was used for wetting the slag

which helped realizing the zero emission of waste water.Meanwhile

water consumption for power generation was decreased by 0.21kg/(kW·h)

and the cost can be saved by 8.259×106 yuan every year.