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

作　　者：唐晓津 骆广生 李洪波 汪家鼎 

机构地区：[1]The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

出　　处：《Chinese Journal of Chemical Engineering》2004年第1期1-6,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. 29236122).

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(l-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 ofΦ=1/2.75uk(uc + 4ud) may be used, which is proposed by this study.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 

分 类 号：TQ028[化学工程]