Vacuum dewatering and residual saturation of incompressible filter cakes |
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| Authors: | RJ Wakeman |
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| Institution: | Department of Chemical Engineering, University of Exeter Great Britain |
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| Abstract: | Fundamental data on the residual saturation of incompressible filter cakes which have been drained by vacuum have been measured. The effects of varying particle size, shape and distribution, type of wetting fluid and cake size have been assessed. A modified ‘threshold pressure’, below which dewatering will not occur, has been defined and an index reflecting the nature of the particles and their packing has been used to represent reduced saturation data. Irreducible saturation levels have been correlated against a capillary number, and by careful definition of the driving force term data scatter have been substantially reduced. |
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