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Distributors and Dispersers

Special attention has to be given to the end compartments of an extraction column, since the phase inlet and outlet points are usually located at different points of the column and are complicated by the presence of phase distributors and at one end by the coalescence zone for the dispersed phase droplets. [Pg.194]

The spray column, shown schematically in Fig. 4.29, is the simplest of the contactors. The heavy aqueous phase enters the top of the vertical cylinder through a distributor and flows downward under gravity, usually as the continuous phase. A distributor at the bottom of the column disperses the entering organic phase into small drops, which rise throu the continuous heavy phase and collect in a layer at the top. Coalescence of the dispersed phase drops and axial circulation and mixing of the continuous phase result in relatively low efficiency of contacting. Very tali columns may be required to obtain only a few theoretical stages. [Pg.206]

FIGURE 4.4 Hot air dispersers for spray drying in food products (a) rotating distributor, (b) plug flow distributor and (c) central pipe distributor. [Pg.54]


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