doiSerbia

Axial dispersion of the liquid phase on a three-phase Karr reciprocating plate column

Nikolić Ljubiša B. (Faculty of Technology, Leskovac)
Nikolić Vesna D. (Faculty of Technology, Leskovac)
Veljković Vlada B. (Faculty of Technology, Leskovac)
Lazić Miodrag L. (Faculty of Technology, Leskovac)
Skala Dejan U. (Faculty of Technology and Metallurgy, Belgrade, Serbia and Montenegro)

The influence of the gas flow rate and vibration intensity in the presence of the solid phase (polypropylene spheres) on axial mixing of the liquid phase in a three phase (gas-liquid-solid) Karr reciprocating plate column (RPC) was investigated. Assuming that the dispersionmodel of liquid flow could be used for the real situation inside the column, the dispersion coefficient of the liquid phase was determined as a function of different operating parameters. For a two-phase liquid-solid RPC the following correlation was derived: DL = 1.26(Af)1.42 UL 0.51 εS 0.23 and a similar equation could be applied with ± 30 % confidence for the calculation of axial dispersion in the case of a three-phase RPC: DL = 1.39(Af)0.47 UL0.42UG0.03 εS -0.26.

Keywords: Karr reciprocating plate column, three-phase column, axial dispersion, residence time distribution, dispersion model