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A Mean Phi model for pressure filtration of fine and colloidal suspensions

DSpace at IIT Bombay

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Title A Mean Phi model for pressure filtration of fine and colloidal suspensions
 
Creator RAHA, S
KHILAR, KC
PRADIP
KAPUR, PC
 
Subject compression-permeability cells
side-wall friction
cake filtration
constant-pressure
flocculated suspensions
filter cakes
yield-stress
palm-oil
consolidation
expression
pressure filtration
compressible filter cake
yield rheology
particulate processing
mathematical modelling and simulation
pareto profile
 
Description A working model for engineering analysis of pressure filtration is presented. Based on the filtration characteristics of fine and colloidal suspensions, the process was divided into two stages. A time-invariant spatially uniform volume fraction of solids approximation is invoked in the growing filter cake stage (stage 1). A time-dependent spatially uniform volume fraction of solids assumption is made in the cake consolidation stage (stage 2). The two models, named collectively as Mean Phi (M-P) model, have a common physical basis, seamless continuity between the stages and internal consistency. The M-P model has only three parameters: terminal or equilibrium volume fraction of solids in the filter cake that is related to its compressive yield stress, critical volume fraction of solids, which joins stage 1 and stage 2, and a permeability factor, which is common to stages 1 and 2. The model is validated with a large number of colloidal suspensions filtered under highly diverse physical-chemical process conditions. A Pareto profile is identified that relates the timescale of filtration and the extent of dewatering achieved, the two most important performance indices of the process.
 
Publisher CANADIAN SOC CHEMICAL ENGINEERING
 
Date 2011-07-19T11:49:34Z
2011-12-26T12:51:11Z
2011-12-27T05:37:39Z
2011-07-19T11:49:34Z
2011-12-26T12:51:11Z
2011-12-27T05:37:39Z
2006
 
Type Article
 
Identifier CANADIAN JOURNAL OF CHEMICAL ENGINEERING, 84(1), 83-93
0008-4034
http://dspace.library.iitb.ac.in/xmlui/handle/10054/5288
http://hdl.handle.net/10054/5288
 
Language en