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Two-Phase Flow Characteristics in a Coalescence-Dispersion Pulsed-Sieve-Plate Extraction
Column

TANG Xiaojin; LUO Guangsheng; LI Hongbo; WANG Jiading   

  1. The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering,
    Tsinghua University,Beijing 100084, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2004-02-28 Published:2004-02-28
  • Contact: TANG Xiaojin

聚合-分散脉冲筛板萃取塔两相流动特性

唐晓津; 骆广生; 李洪波; 汪家鼎

  

  1. The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering,
    Tsinghua University,Beijing 100084, China
  • 通讯作者: 唐晓津

Abstract: A study on two-phase flow characteristics in a coalescence-dispersion pulsed-sieve-plate
extraction column of 150mm in diameter was carried out with a working system of 30% tri-
butyl-phosphate (TBP) (in kerosene)nitric acid-water. The influence of operation conditions
on the holdup of the dispersed phase was investigated.According to the analysis of the
experimental data, there was a turning point on the curve of ln(Vs) versus ln(1-φ)under
certain pulse intensity. When the holdup is higher than the value at the turning point, the
two-phase flow characteristics can be described with the modified Pratt’s equation,
otherwise a new relation in the form of φ =1/2.75uk (uc + 4ud) may be used, which is
proposed by this study.

Key words: pulsed-sieve-plate column, coalescence-dispersion, hydrodynamics, holdup

摘要: A study on two-phase flow characteristics in a coalescence-dispersion pulsed-sieve-plate
extraction column of 150mm in diameter was carried out with a working system of 30% tri-
butyl-phosphate (TBP) (in kerosene)nitric acid-water. The influence of operation conditions
on the holdup of the dispersed phase was investigated.According to the analysis of the
experimental data, there was a turning point on the curve of ln(Vs) versus ln(1-φ)under
certain pulse intensity. When the holdup is higher than the value at the turning point, the
two-phase flow characteristics can be described with the modified Pratt’s equation,
otherwise a new relation in the form of φ =1/2.75uk (uc + 4ud) may be used, which is
proposed by this study.

关键词: pulsed-sieve-plate column;coalescence-dispersion;hydrodynamics;holdup