Influence of Wash Liquid Properties on the Efficiency of Pulp Washing

Potuček, F. and Skotnicová, I. Influence of Wash Liquid Properties on the Efficiency of Pulp Washing Chemical Papers, Vol.56, No. 6, 2002, 369-373

Document type: Článok z časopisu / Journal Article
Collection: Chemical papers  
 
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Author(s) Potuček, F.
Skotnicová, I.
Title Influence of Wash Liquid Properties on the Efficiency of Pulp Washing
Journal name Chemical Papers
Publication date 2002
Year available 2002
Volume number 56
Issue number 6
ISSN 0366-6352
Start page 369
End page 373
Place of publication Poland
Publisher Versita
Collection year 2002
Language english
Subject 290000 Engineering and Technology
290600 Chemical Engineering
Abstract/Summary In a laboratory washing cell, the mechanism of the displacement washing of unbleached kraft pulp was investigated. Wash liquids with various pH values varying in the range from 2 to 11 were used to displace black liquor from the pulp bed. Using the step function input change method, the washing breakthrough curves obtained experimentally were described by the axially dispersed plug flow model. To characterize the displacement washing process, the wash yield, as well as the flow model parameters were evaluated. The effect of the superficial wash liquid velocity and of the mobility of displacing and displaced liquids upon the axial dispersion coefficient was discussed. A correlation between the wash yield, Peclet number, and pH of wash liquid was derived as well.
 
 
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