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Hydrodynamic regimes in spray extraction columns

  • B. G. Varfolomeev
  • V. L. Pebalk
Article
  • 40 Downloads

Abstract

The loose- and close-drop-packing regimes in spray extraction columns are discussed. The turbulent close-packing regimes in columns with jet or mechanical dispersion and in pulse columns are described for the first time.

Keywords

Continuous Phase Close Packing Hydrodynamic Regime Mechanical Dispersion Heavy Phase 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notation

A

pulse amplitude, m

D

column diameter, m

d

average drop diameter, m

f

pulsation frequency, s-1

J

Af-puise rate, m/s

L

height of the working zone of the column, m

ud

peripheral velocity of the blades of a disperser, m/s

ut

peripheral velocity of the blades of a turbulizing stirrer, m/s

v

volume of the working zone of the column, m3

δV

specific flow rate of a phase, m3/(m2 h)

δV

flow-rate disbalance of a phase, m3/(m2 h)

z

fraction of the working height of the column

xin, xeq

initial and equilibrium concentrations of the component being transferred, respectively, g/1

υ

viscosity of a phase, Pa s

p

density of a phase, kg/m3

Ο

interfacial tension, N/m

Τ

time, s

Φ

dispersed-phase holdup, m3/m3

Subscripts

cont

continous phase

disp

dispersed phase

c

close packing of drops

l

loose packing of drops

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References

  1. 1.
    Fernando, R.S., Hydraulic Characteristics of Spray Extraction Columns with Closely Packed Drops,Cand. Sci. (Eng.) Dissertation, Moscow: Moscow Inst. Fine Chem. Technol., 1986.Google Scholar
  2. 2.
    Chigogidze, K.Sh., Hydraulic and Mass-Exchange Characteristics of Modified Spray Extraction Columns with Closely Packed Drops,Cand. Sci. (Eng.) Dissertation, Moscow: Moscow Inst. Fine Chem. Technol., 1983.Google Scholar
  3. 3.
    Osnovy zhidkostnoi ekstraktsii (Principles of Liquid Extraction), Yagodin, G.A., Ed., Moscow: Khimiya, 1981.Google Scholar
  4. 4.
    Nguen Ngok Lan, Hydraulic and Mass-Exchange Characteristics of Pulse Spray Extraction Columns with Closely Packed Drops,Cand. Sci. (Eng.) Dissertation, Moscow: Moscow Inst. Fine Chem. Technol., 1990.Google Scholar
  5. 5.
    Zelenchev, A.V., Mass Exchange in a Spray Column with Closely Packed Drops,Cand. Sei. (Eng.) Dissertation, Moscow: Moscow Inst. Fine Chem. Technol., 1986.Google Scholar
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    Sucin, P., Smigelskhi, O., and Ruckenstein, E., Some Experiments on the Marangoni Effect,AIChE J., 1967, vol. 13, no. 6, p. 1120.CrossRefGoogle Scholar
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    Olander, D.R. and Reddy, L.B., Effect of Concentration Driving Force on Liquid-Liquid Mass Transfer,Chem. Eng. Sci., 1964, vol. 19, no. 1, p. 67.CrossRefGoogle Scholar

Copyright information

© MAIK “Nauka/Interperiodica” 2000

Authors and Affiliations

  • B. G. Varfolomeev
    • 1
  • V. L. Pebalk
    • 1
  1. 1.Lomonosov State Academy of Fine Chemical TechnologyMoscowRussia

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