外驱旋转式能量回收装置的设计和性能测试

Design and Performance Tests of Motor-Driven Rotary Energy Recovery Device

旋转式能量回收装置(RERD)作为反渗透海水淡化系统的节能设备,对于降低系统能耗和产水成本具有重要意义。设计和加工了一套新的外驱旋转式能量回收装置,建立了满足其性能评测要求的一套完整的反渗透海水淡化系统。当装置的性能很好地满足工业化运用需求时,对RERD与反渗透淡化系统的耦合运行性能进行了现场测试。实验结果表明:反渗透膜的操作压力为6.0 MPa、RERD的处理量为13 m^3/h及转子转速为500 r/min时,装置的泄漏量为0.57 m^3/h,能量回收效率达到91.2%。保持反渗透膜的操作压力和装置转速不变,当装置的处理量为16 m^3/h时,进出RERD的4股流体的流量和压力波动较小,装置的能量回收效率略有提高,达到92.5%。

Rotary energy recovery device（ RERD）,as the energy saving equipment of seawater desalination system,has a great significance on reducing the power consumption and permeate cost of the system. In this paper,a new motor-driven RERD was designed and manufactured,and a complete SWRO desalination system was also established in order to evaluate the performances of the device. When the RERD can satisfy well the requirement of industrial application,we made a on-site testing about performances of RERD coupled with SWRO system. The experimental results show that at the operating condition of RERD capacity 13 m^3/h,the rotating speed 500 r/min and the working pressure 6. 0 MPa,the leakage of the device is about 0. 57 m^3/h and energy recovery efficiency of the device can reach 91. 2%. When the operating capacity of the RERD is increased to 16 m^3/h,the flows and pressures of the fluids in and out of the device almost keep constant,the energy recovery efficiency is slightly increased to about 92. 5%.