Page 123 - Packed bed columns for absorption, desorption, rectification and direct heat transfer

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Fig. 13. Installation for determination of the axial mixing in the liquid phase,
a- packed bed column; b- packing; c~ column bottom; d- regulation valve for water flow; e- liquid
flow meter; f- liquid phase distributor, g- ventilator, h- gas flow meter; i- valve; k- tracer pressure
tank; 1- tracer valve; m- tracer distribution; n- conductivity measurement cell; conductivity
meaiurement device.

The signal for measuring of the conductivity of the liquid is taken by a
sensor of two platinum rings, mounted in a special measurement cell, Fig, 14,
constructed to ensure a small liquid phase volume in it, and thus to reduce the
influence of the cell on tr , Eq. (13), for the packing. This is because
practically the value of the dispersion of the tracer retention time is measured
not only for the packing but for both packing and measurement cell.