Experimental study on ultrafiltration-reverse osmosis desalination of highly mineralized mine water
In order to realize the comprehensive utilization of highly mineralized mine water,the experimental study was made on using ultrafiltration(UF)-reverse osmosis(RO)process for desalination of deeply processed mine water in Wutongzhuang Mine.The research of ultrafiltration pretreatment system included the determination of membrane pressure difference and optimal parameters of ultrafiltration membrane backwash cycle.The research of reverse osmosis system included the influence of pressure and temperature on the system and the removal rate of related ions.The test results showed that the membrane pressure difference of ultrafiltration system should be controlled at 0.122 MPa,and the backwash cycle should be controlled at 30 min-45 min.The operating pressure of the reverse osmosis system should be controlled within 1.4 MPa-2.0 MPa,the operating temperature should be controlled within the range of 14℃-24℃,and the optimal temperature was about 22℃.The removal rate of divalent ions such as Ca2+,Mg2+,SO42-by the reverse osmosis system was more than 98%,the removal rate of monovalent Cl-was more than 96%,and the removal rate of total hardness was more than 97%.In order to avoid membrane fouling and blockage and ensure the stable and continuous operation of the reverse osmosis system,the desalination rate of the reverse osmosis system in the engineering design was generally designed as 97%.
万方数据
维普
