袁慎峰,李志鹏,尹红,陈志荣

• 1:浙江大学 化学工程与生物工程学院，浙江省化工高效制造技术重点实验室，浙江 杭州 310027

摘要(Abstract)：

为明确萃取塔对不同体系、不同操作条件下的性能，在内径为50 mm的三级搅拌筛板萃取塔中，针对7个不同物性特点的体系进行了液泛特性研究，液泛点采用观察法判断。实验结果表明，穿流式筛板的过孔阻力和过度搅拌是液泛产生的两个原因；萃取塔的两相总空塔流速与搅拌转速关系曲线将塔的操作区域分为搅拌不足液泛区、正常操作区、搅拌过度液泛区和流速过高液泛区等区域；增大分散相流速比增大连续相流速更容易造成液泛。通过比较不同界面张力、两相密度差、连续相黏度体系的液泛特性可知，该萃取塔适合中、低界面张力体系在低流速下操作。

关键词(KeyWords)： 搅拌筛板萃取塔;液泛;两相流;体系物性

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 袁慎峰,李志鹏,尹红,陈志荣

DOI: 10.3969/j.issn.1003-9015.2021.04.003

参考文献(References)：

• [1] 费维扬. 面向21世纪的溶剂萃取技术[J]. 化工进展, 2000, 19(1):11-13. FEI W Y. Solvent extraction technology for the 21st century[J]. Chemical Industry and Engineering Progress, 2000, 19(1):11-13.
  [2] 汪家鼎, 陈家镛. 溶剂萃取手册[M]. 北京:化学工业出版社, 2001. WANG J D, CHEN J Y. Manual of solvent extraction[M]. Beijing:Chemical Industry Press, 2001.
  [3] 戴猷元. 液液萃取化工基础[M]. 北京:化学工业出版社, 2015. DAI Y Y. Fundamentals of liquid-liquid extraction[M]. Beijing:Chemical Industry Press, 2015.
  [4] SCHEIBEL E G, KARR A E. Semicommercial multistage extraction column-performance characteristics[J]. Industrial & Engineering Chemistry, 1950, 42(6):1048-1057.
  [5] HONEKAMP J R, BURKHART L E. Role of the packing in a Scheibel extractor[J]. Industrial & Engineering Chemistry Process Design & Development, 1960, 1(3):176-184.
  [6] BONNET J C, JEFFREYS G V. Hydrodynamics and mass transfer characteristics of a Scheibel extractor. Part II:Backmixing and stage efficiency[J]. AIChE Journal, 1985, 31(5):795-801.
  [7] 陈真生, 袁慎峰, 尹红, 等. 改进的Scheibel萃取塔的性能研究[J]. 浙江化工, 2010, 41(4):27-30. CHEN Z S, YUAN S F, YIN H, et al. Study on a modified Scheibel extraction tower[J]. Zhejiang Chemical Industry, 2010, 41(4):27-30.
  [8] ROCHA J A, CARLOS CARDENAS J, SOSA C, et al. Preliminary design of sieve tray extraction columns. 1. Determination of the column diameter. Flooding velocities in sieve tray extractors[J]. Industrial & Engineering Chemistry Research, 1989, 28(12):1873-1878.
  [9] SMOOT L D, MAR B W, BABB A L. Flooding characteristics and separation efficiencies of pulsed sieve-plate extraction columns[J]. Industrial & Engineering Chemistry, 1959, 51(9):1005-1010.
  [10] ASADOLLAHZADEH M, HAGHIGHI-ASL A, SAFDARI J, et al. Flooding characteristics in pulsed packed extraction columns[J]. Brazilian Journal of Chemical Engineering, 2011, 28(4):625-638.
  [11] SHIRVANI A R, GHAEMI A, TORAB-MOSTAEDI M. Experimental investigation of flooding and drop size in a Kuhni extraction column[J]. International Journal of Engineering, 2016, 29(3):288-296.
  [12] BONNET J C, JEFFREYS G V. Hydrodynamics and mass transfer characteristics of a Scheibel extractor. Part I:Drop size distribution, holdup, and flooding[J]. AIChE Journal, 1985, 31(5):788-794.
  [13] YADAV R L, PATWARDHAN A W. Design aspects of pulsed sieve plate columns[J]. Chemical Engineering Journal, 2008, 138(1):389-415.
  [14] KARR A E. Performance of a reciprocating-plate extraction column[J]. AIChE Journal, 1959, 5(4):446-452.
  [15] HAFEZ M M, BAIRD M H I, NIRDOSH I. Flooding and axial dispersion in reciprocating plate extraction columns[J]. The Canadian Journal of Chemical Engineering, 1979, 57(2):150-158.
  [16] 金双凤. 改进Scheibel萃取塔停留时间分布研究[D]. 杭州:浙江大学, 2015 JIN S F. Study on residence time distribution in the modified Scheibel extraction column[D]. Hangzhou:Zhejiang University, 2015.
  [17] 石一. 改进Scheibel萃取塔分散相行为研究[D]. 杭州:浙江大学, 2012. SHI Y. Study on dispersed phase behavior in the modified Scheibel extraction column[D]. Hangzhou:Zhejiang University, 2012.
  [18] YUAN S, JIN S, CHEN Z, et al. An Improved correlation of the mean drop size in a modified Scheibel extraction column[J]. Chemical Engineering & Technology, 2014, 37(12):2165-2174.
  [19] PANAHINIA F, GHANNADI-MARAGHEH M, SAFDARI J, et al. Experimental investigation concerning the effect of mass transfer direction on mean drop size and holdup in a horizontal pulsed plate extraction column[J]. RSC Advances, 2017, 7(15):8908-8921.