气体搅拌的萃取塔中轴向混合性质的研究  

A Study on Axial Backmixing Characteristics in a Gas Agitated Extractor

作　　者：李素君 任晓光[2] 宋永吉[2] 刘长厚[3] 

机构地区：[1]辽阳石油化工高等专科学校化工系,辽宁辽阳111003 [2]北京石油化工学院,北京102600 [3]大连理工大学化工学院,辽宁大连116012

出　　处：《高校化学工程学报》2002年第3期281-286,共6页Journal of Chemical Engineering of Chinese Universities

摘　　要：在内径为50mm的气体搅拌萃取塔中,研究了空气-水-煤油系统的轴向混合特征。实验以水为连续相,煤油为分散相,以空气为搅拌动力源,采用脉冲应答技术,分别测定了连续相和分散相的轴向扩散系数,并讨论了连续相流速、分散相流速、气相流速及在塔内装入静态混合器时对塔内轴向混合性质的影响,得到了在操作范围内的经验关联式。Experiments and studies on axial backmixing were carried out in a gas agitated extractor with air-water-kerosene three phase system, the extract tower抯 internal diameter was 50 mm. In the system, water was the continuous phase, kerosene was the dispersed phase and the air was used for agitation. By using the impulse response method, the axial dispersion coefficient of the continuous phase and the dispersed phase were measured respectively, and the experimental ranges of those parameters are following, dispersion phase velocity ud=0~5mms-1, continuous phase velocity uc=0~13mms-1, water phase velocity ug=0~36 mms-1. The effects of water phase velocity, oil phase velocity, gas phase velocity on axial backmixing were discussed. Empirical correlations describing axial backmixing were obtained.

关 键 词：萃取塔 气体搅拌 轴向混合 轴向扩散系数 静态混合器 液液萃取 分离 

分 类 号：TQ051.83[化学工程] TQ027.35