Holdup of Dispersed Phase in a Mixer-Settler Extraction Column
Holdup of Dispersed Phase in a Mixer-Settler Extraction Column
复制标题
混合沉降器萃取塔中分散相的滞留量
DOI：
10.1252/jcej.23.12
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发表时间：
1990
影响因子：
0.8
通讯作者：
H. Takeuchi
中科院分区：
文献类型：
--
作者：
Katsuroku Takahashi;H. Takeuchi
在配备有提升涡轮叶轮的单级混合沉降器塔中测量搅拌的液-液分散体中的滞留量。叶轮上方和下方局部位置的分散相持留率存在较大差异。叶轮下方的滞留数据通过基于由于滞留差异引起的分散相传递的模型来描述，而叶轮上方的滞留数据则通过分散相和连续相之间的相对速度来描述。分散相的传递系数作为搅拌速度的函数给出，相对速度与搅拌速度、界面张力和相之间的密度差相关。
Holdups in a stirred liquid-liquid dispersion were measured in a single-stage mixer-settler column equipped with a lifter turbine impeller. There was a large difference in dispersed phase holdup between the local positions above and below the impeller. The data of holdup below the impeller are described by a model based on a dispersed-phase transfer due to the holdup difference, those of holdup above the impeller by the relative velocity between the dispersed and the continuous phases. The transfer coefficient of the dispersed phase is given as a function of the agitation speed, the relative velocity being correlated with the agitation speed, the interfacial tension and the density difference between the phases.