JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
Online ISSN : 1881-1299
Print ISSN : 0021-9592
EFFECTS ON EXPRESSION-RATE INCREASE OF SOLID-LIQUID MIXTURE WITH INSERTED STRINGS
MOMPEI SHIRATOTOSHIRO MURASENIICHI HAYASHITETSUO NOGUCHI
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1978 Volume 11 Issue 4 Pages 315-318

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Abstract

To improve deliquoring rates in batch-type expression equipment, expression experiments of thickend slurry and semi-solid materials were carried out at constant expression pressure by using a compression-permeability cell equipped with vertical, permeable strings. The experiments showed that filtration with strings can be represented by Ruth''s filtration equation and the successive consolidation processes by the consolidation equation based upon the Terzaghi-Voigt model. Consequently, the experimental values of filtration coefficient Ks and consolidation coefficient (Ce)s can be determined by using experimental data. The string effects on filtration and consolidation rates are evaluated in terms of the increase in K and Ce values. It has become apparent that the effects depend heavily on the ratio of radial to vertical maximum drainage distance iR/L0 and the increase in deliquoring rates is remarkable when iR/L0≤1.0.

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