闭式涡轮转盘塔中液滴大小的研究

Investigation of Mean Drop Diameter in CTRDC

用拍照法研究了闭式涡轮转盘塔（ＣＴＲＤＣ）中液滴平均直径ｄｐ与转速ＮＲ、总通量Ｖ、流比Ｌ等操作条件的关系，并与普通转盘塔（ＲＤＣ）作了比较。由于闭式涡轮的强烈搅拌作用，ＮＲ和ｄｐ均比ＲＤＣ大大降低，且由于ＮＲ小于临界转速ＮＲｃ，液滴上升过程中被转盘进一步分散的几率很小，因而ｄｐ轴向分布较均匀。实验结果与理论分析预测相吻合。

The relation of mean drop diameter (dp) with the operating conditions,such as the rotor speed (NR),the phase ratio and the total flow rate (V) in CTRDC (Rotating Disk Contactor with Closed Turbine) near the dispersed phase inlet,has been investigated photographically.Compared with RDC (Rotating Disk Contactor),because of strong agitation of the closed turbine (s),NR and dp decrease sharply.Moreover as NR<NRc(critical rotor speed),the droplets dispersed can hardly be redispersed when they ascend.The experimental results fit well with the theoretical prediction.