Application of permeable collectors in deep-bed filtration

Abstract

A study on the possible use of media composed of permeable spheres in deep-bed filtration was conducted. The permeable spheres were made of thin fibers and have different porosities. With such media, particle retention takes place at the outside surfaces as well as throughout the entire body of the spheres. Theoretical analysis based on trajectory calculations using cell models to characterize both the interphere and intrasphere flow fields was carried out for estimating the particle collection efficiency. A parametric study was made to examine the effect of the various operating variables. In contrast to conventional deep-bed filtration using impermeable grains, filtration using permeable spheres performs better in particle collection. This conclusion was confirmed by experiments presented in the second part of this study.