DEVELOPMENT OF LIQUID-LIQUID EXTRACTORS WITH ELECTROSTATIC FIELD

将新的喷雾柱（9cm直径）和40 cm高），垂直平行板电极，用于静电液体萃取器。本文利用水滴在环己烷中的体系，从分散相含率、液滴速度、液滴粒径分布和连续相轴向混合等方面研究了直流电场中分散液滴的粒子数行为。碘从碘水溶液的分散相到连续相的传质也被测量在施加电压高达37 kV的范围内。持液率特性显着依赖于分散相的进料速率和施加电压。在分散相含率较低的情况下，液滴的运动速度可以用单液滴的半经验方程来估算。结果表明，外加电压使液滴粒径分布变宽，有利于连续相的轴向混合，同时也有效地提高了分散相的总体积传质系数。

A new spray column(9 cm dia. and 40 cm height) with vertical parallel plateelectrodes was deviced for an electrostatic liquid extractor. The population behavior of dispersed drops in a d.c. electric field was studied on dispersed phase holdup, drop velocity, drop size distribution and axial mixing of continuous phase by use of the system of water drops in cyclohexane. Mass transfer of iodine from dispersed phase of aqueous iodine solution into continuous phase was also measured in a range of applied voltage up to 37 kV.The holdup characteristic depended significantly on the feed rate of dispersed phase and the applied voltage. In a low holdup of the dispersed phase, the moving velocity of the drops could be estimated satisfactorily by a semi-empirical equation proposed for single drops. The drop size distribution was found to be wider with the applied voltage.The axial mixing of continuous phase was influenced favorably by the applied voltage, and the overall volumetric mass transfer coefficient based on dispersed phase was also effectively improved with the applied voltage.