旋转式能量回收装置的启动与运行特性

摘要

能量回收装置是降低反渗透海水淡化（SWRO）系统运行能耗和制水成本的关键设备之一。本文开发并试制了一种具有新型端盘结构的旋转式能量回收装置，并对其启动方式进行了研究优化，测试分析了装置的动密封性能和效率特性，并对装置连续运行稳定性进行了考核。结果表明，旋转式能量回收装置在转速增至额定值后再进行升压操作的启动方式下驱动扭矩最小；装置泄漏量随操作压力增高而增大，在6.0 MPa 时，为0.58 m3/h；在转速为500 r/min、处理量为8.0 m3/h及操作压力为6.0 MPa时，装置连续运行稳定，能量回收效率为93%。这些研究结果对旋转式能量回收装置的开发和工程应用具有一定的指导意义。%Energy recovery device (ERD) is one of the key apparatus to reduce the energy consumption and the costs of water production in seawater reverse osmosis (SWRO) system. This research developed a rotary energy recovery device (RERD) with innovative endplates. Optimization of the start-up modes of the RERD under different operational conditions,dynamic sealing performances, energy recovery efficiencies and operating stabilities were tested and evaluated. The results showed that the optimal start-up speed of the device before boosting the system to the working pressure level was 500 r/min. The system leakage increased with the increase of pressure. The system leakage was 0.58 m3/h at the pressure of 6.0 MPa. Under the testing conditions of rotating speed of 500 r/min, working capacity of 8.0 m3/h and the operating pressure of 6.0 MPa,the operation of the RERD was stable with an energy recovery efficiency of 93%. The results could be helpful in the development and industrial application of RERDs in future research.