Fundamental study of agitated liquid-liguid column extractor with active turbine impellers

1.主动涡轮叶轮的液滴形成：设计了一种新型涡轮叶轮一级塔，其上装有多个静态混合通道。以水中不同有机液滴为对象，研究了分散相和连续相在通道中的流动行为、液滴形成机理和液滴大小。液滴的形成机理复杂，受分散相流量和叶轮转速的影响，液滴的大小分布随叶轮转速的增加而发生变化，从双峰型到单峰型。主动涡轮叶轮塔式萃取器的流动特性：对四级塔式萃取器的水动力学特性进行了研究。研究了叶轮转速、分散相流量和连续相流量对分散相轴向含率曲线和分散相临界驱油流量的影响。在一定的操作条件下，含率曲线呈凸形。临界淹水流量在2.67rps时最大，随连续相流量的增加而减小。色谱柱传质特性：采用甲苯（分散相）/丙酮（传递溶质）/水（连续相）测试系统，考察了不同操作条件对传质效率的影响。用每柱高的理论级数来评价柱的性能，实验结果表明，与其他常规柱相比，该柱的性能较高。

1.Drop formation from an active-turbine impeller : One stage column with new type turbine impeller which was equipped with several static mixer channels was devised. The flow behavior of dispersed and continuous phases through the channel, the mechanism of drop formation and the size of the drops were investigated esing the system of different organic drops in water. The mechanism of drop formation was complex depending on the flow rate of the dispersed phase and rotating speed of the impeller, and the size distribution of the drops changed with increasing the impeller speed from bimodal to unimodal patterns.2.Flow characterstics of a column extractor with active-turbine impellers : The hydrodynamics of the column extractor with 4 stages was studied for the system of toluene drops in water.The effects of rotational speed of the impller, and dispersed and continuous phase flow rates on axia holdup profiles of the disspersed phase and critical flooding flow rate of the dispersed phase were investigated. The holdup profile showed a cincave shape under a given operating condition. The critical flooding flow rats had maximum values at 2.67rps and decreased with increasing the continuous phase flow rate.3.Mass transfer characteristics of the column : The effects of different operating conditions on mass transfer efficiency wre investigated using toluene (dispersed phase)/acetone (transfer solute)/water (continuous phase) test system. The column performance was evaluated by the numbers of theoretical stage per column height, and it was shown experimentally that the performance of the present column was high compared with that of other conventional columns.