能量回收装置在海水纳滤脱盐系统中的应用分析

Application Analysis of Energy Recovery Device in Seawater Nanofiltration System

纳滤膜分离技术对2价离子的独特分离功能,使其在海水淡化脱盐、水软化处理等领域具有广泛的市场应用。针对实际工程中海水纳滤脱盐系统的节能需求,建立了"纳滤+能量回收"耦合工艺流程;研究分析了自主开发的能量回收装置产品与纳滤脱盐系统的耦合运行特性,及能量回收装置对系统运行能耗降低的实际贡献率。结果表明,自主开发的能量回收装置与海水纳滤脱盐系统的耦合运行稳定性良好,装置能量回收效率高达96.28%,对纳滤脱盐系统本体运行能耗的降低幅度可达44%。

Due to the unique separation functions of divalent ions,nanofiltration membrane separation technology has extensive market application in seawater desalination,water softening treatment and other fields. In this paper,a hybrid desalination process of 'nanofiltration plus energy recovery device' was developed according to the energy-saving requirement of a practical seawater nanofiltration engineering. Operating characteristics of the hybrid desalination system were studied and analyzed by adopting the proprietary energy recovery device. What's more,the actual contribution of the integrated energy recovery device to the nanofiltration system was evaluated. The results indicate that the operation stability of the hybrid system is good,the efficiency of the energy recovery device can be up to 96. 28%,which dramatically reduces the power consumption of the seawater nanofiltration system by about 44%.