The Resident Time Distribution of Injected Dispersed Drops in Stirred Extraction Columns  

作　　者：尤学一 李丹 李胜华 

机构地区：[1]School of Environmental Science and Engineering,Tianjin University,Tianjin 300072,China [2]School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China

出　　处：《Chinese Journal of Chemical Engineering》2005年第6期726-731,共6页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China (No. 20376053).

摘　　要：A resident time model is proposed to evaluate the performance of agitated extraction columns. In this model, the resident time of dispersed drops is simulated with the discrete phase modeling, where the continuous phase and the dispersed phase （drops） are described by the single-phase Navier-Stokes （turbulence） model and Lagrangian model, respectively. The interaction of dispersed phase and continuous phase is neglected for the low concentration of drop in the cases studied. The statistical parameters of drops （the average resident time and standard deviation） under different operation conditions are computed for four columns. The relation of the above statistical parameters with the performance of columns is discussed and the criterions for an optimal compartment are outlined. Our results indicate that the resident time model is useful to evaluate the performance and optimize the design of extraction columns.一个居民时间模型被建议评估鼓动的抽提塔的表演。在这个模型，驱散的落下的居民时间被模仿，分散相当模特儿，在连续相和分散相(落下)被thesingle阶段海军司烧(骚乱)描述的地方模型和 Lagrangian 模型，分散相和连续相的 respectively.The 相互作用在 casesstudied.The 为落下的低集中被忽视在不同操作条件下面的落下(普通居民时间和标准误差)的统计参数为四列被计算。有列的表演的上述统计参数的关系被讨论，为最佳的分隔空间的标准被构画出。我们的结果显示居民时间模型是有用的评估表演并且优化抽提塔的设计。

关 键 词：resident time stirred extraction column discrete phase modeling computational fluid dynamics 

分 类 号：TQ028[化学工程]