开式涡轮转盘塔用于液-液-固系时的固相滞留率及轴向混合

Solid-Phase Holdup and Axial Mixing in Open Turbine Rotating Disc Contactor for Liquid-Liquid-Solid System

用石英砂-水(连续相)-煤油(分散相)系,在直径0.152m的开式涡轮转盘塔中进行了实验,证明该塔用于含固量较高的液-液-固系是可行的。研究了转速、隔室高度、定环开孔直径和各相表观流速对固相滞留率及轴向混合的影响,给出了固相滞留率及返流此的关联式。

The open turbine rotating disc contactor (OTRDC) has been constructed by adding three narrow strips to the lower surface of each rotating disc in the rotating disc contactor (RDC), so that it can be used for liquid-liquid-solid system with high solid particle content. Experiments were carried out in a 0.152 m diameter contactor using quartz particles, tap water (continuous phase) and kerosene (dispersed phase). The variables studied were the rotor speed, compartment height, stator ring opening, and the superficial velocities. Correlations for predicting holdup and backflow ratio of solid phase have been given.Experimental results have shown that (1) OTRDC is feasible for liquid-liquid-solid system; (2) the solid phase axial mixing is mainly determined by the particle size distribution and rotor speed.