Pressure drop in pulsed extraction columns with internals of discs and doughnuts

George Angelov (1) , Christophe Gourdon (2)

1 BAS - Bulgarian Academy of Sciences
2 LGC - Laboratoire de Génie Chimique

A study on the pressure drop in pulsed extraction columns with internals of immobile discs and rings, usually called Discs and Doughnuts Columns (DDC) is carried out. The local pressure at a desired level of the column is obtained by resolving of turbulent flow model based on Reynolds equations coupled with k-ε model of turbulence. Consequently, the pressure drop for a column stage or for a unit of column length is determined. The results are used for development of correlations for determination of pressure drop as a function of plate free area, interplate distance and pulsation parameters - amplitude and frequency. Good correspondence to experimental data is observed. The developed quantitative relations are useful for non-experimental numerical optimization of stage geometry in view of lesser energy consumption.

Mots clés: Pressure drop; Pulsed flow; Discs and doughnuts column

Domaines: Génie chimique; Mécanique [physics]

George Angelov, Christophe Gourdon. Pressure drop in pulsed extraction columns with internals of discs and doughnuts. Chemical Engineering Research and Design, 2012, vol. 90, pp. 877-883. ⟨10.1016/j.cherd.2011.10.011⟩. ⟨hal-00880484⟩