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

主动涡轮叶轮搅拌式液-液柱萃取器的基础研究

基本信息

批准号：
08650891
负责人：
YAMAGUCHI Manabu
金额：
$ 1.28万
依托单位：
Himeji Institute of Technology Faculty of Engineering, Professor (1997)Osaka University (1996)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

项目摘要

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.

1.主动涡轮叶轮的液滴形成：设计了带有多个静态混合器通道的新型涡轮叶轮的一级塔。在不同有机水滴体系中，研究了分散相和连续相在流道中的流动行为、液滴的形成机理和液滴的大小。液滴的形成机理与分散相的流量和叶轮的转速有关，液滴的尺寸分布随叶轮转速的增加而从双峰型向单峰型变化。2.主动涡轮叶轮柱萃取器的流动特性：针对甲苯水滴体系，研究了四级塔萃取器的流体力学特性，考察了进料器转速、分散相流量和连续相流量对分散相含液率分布和分散相临界液泛流量的影响。在给定的操作条件下，持液率曲线呈凹陷状。塔柱的传质特性：采用甲苯(分散相)/丙酮(传质溶质)/水(连续相)实验系统考察了不同操作条件对传质效率的影响。以每柱高的理论级数来评价该塔的性能，实验结果表明，与其他常规塔相比，该塔的性能较高。