Hydraulic behavior of synthetic non-woven filter fabrics

Authors

  • A. L. Rollin,

    Corresponding author
    1. Chemical Engineering Department, Ecole Polytechnique de Montréal, C.P. 6079, Station “A”, Montreal, Quebec H3C 3A7
    • Chemical Engineering Department, Ecole Polytechnique de Montréal, C.P. 6079, Station “A”, Montreal, Quebec H3C 3A7
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  • R. Denis,

    1. Chemical Engineering Department, Ecole Polytechnique de Montréal, C.P. 6079, Station “A”, Montreal, Quebec H3C 3A7
    Current affiliation:
    1. working for Bell Canada, Montreal.
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  • L. Estaque,

    1. Chemical Engineering Department, Ecole Polytechnique de Montréal, C.P. 6079, Station “A”, Montreal, Quebec H3C 3A7
    Current affiliation:
    1. working for General Food, Montreal.
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  • J. Masounave

    1. Chemical Engineering Department, Ecole Polytechnique de Montréal, C.P. 6079, Station “A”, Montreal, Quebec H3C 3A7
    Current affiliation:
    1. Metallurgical Department at E.P.M.
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Abstract

The filtration performance of non-woven thick synthetic membranes used as filter fabrics is predicted from a proposed analytical method. The morphological analysis of many commercial fabrics has been utilized to identify internal structure parameters responsible for their hydraulic properties and also to predict the water permeability and the retention of particles in these fabrics.

Experimental filtration tests were performed to gather data on the water permeability used in predicting clogging level. Also fibres' density and pore size histograms of fabrics were measured with an Image Analyser and a relationship was developed between the water permeability and the fibres' density.

Finally it was found that the pore size histogram of non-woven fabrics of thickness greater than 1.5 mm could be calculated simply by measuring its water permeability and using an empirical correlation.

Abstract

On propose une méthode analytique permettant de prédire la performance comme filtres de toiles de fibres synthétiques non tissées, épaisses. On a utilisé l'analyse morphologique d'un grand nombre de toiles commerciales pour identifier les paramètres de la structure interne, responsables de leurs propriétés hydrauliques et prévoir la perméabilité à l'eau ainsi que la rétention des particules dans ces toiles.

On a fait des essais expérimentaux de filtration pour obtenir les données sur la perméabilité à l'eau, nécessaire pour prévoir le degré d'obturation. On a mesuré, avec un analyseur d'images, la densité des fibres et les histogrammes des dimensions des pores et l'on a établi une relation entre la perméabilité à l'eau et la densité des fibres.

On a également établi que pour les toiles non tissées d'épaisseur supérieure à 1.5 mm, l'histogramme de la distribution de dimension des pores pouvait ětre calculé grǎce à une mesure simple de perméabilité, en employant une corrélation empirique.

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