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旋转式压力能交换器是反渗透海水淡化过程中的重要设备之一,在降低能耗及系统运行成本方面具有重要作用。本文针对具有双环、类扇形转子结构的旋转式压力交换器,运用Fluent软件对其内部质量传递过程进行了数值模拟,分析了转子孔道盐水浓度分布,及进口流速、转速和孔道长度对孔道浓度分布的影响规律。结果表明:在转子旋转的一个周期内,海水与盐水的混合区域在转子孔道内做一次上下往复运动,海水的品质受转子孔道中混合区域溢出程度的影响;进口流速越大、转子转速越小,混合区域流体溢出程度增大,出口海水品质降低;孔道长度越长,混合区域流体溢出程度及高压出口盐水浓度呈减小趋势。
Rotary pressure exchanger is one of the important equipment in reverse osmosis desalination, which plays an important role in reducing energy consumption and system operating costs. In this paper, a rotary pressure exchanger with a double-ring and fan-like rotor structure is used to simulate the internal mass transfer process with Fluent software. The concentration distribution of brine in the rotor channel and the effect of inlet velocity, The law of influence. The results show that the mixing area of sea water and salt water moves back and forth within the rotor channel in a cycle of rotor rotation. The quality of seawater is affected by the spillage of the mixing area in the rotor channel. The larger the inlet flow rate, the smaller the rotor speed , The fluid overflow in the mixing area increased and the quality of the outlet seawater decreased. The longer the channel length, the more the fluid overflow in the mixing area and the brine concentration at the outlet of the outlet pipe decreased.