Development Of A Novel High Performance
Continuous Cake-less Filtration System
Author(s)
J. Tsubaki, T. Katsuoka, T. Yamada, H. Satone,
T. Mori & T. Sugimoto
Abstract
A new cake-less continuous filtration system has been developed for large-scale
treatment. Sericite slurries prepared by adding water glass as dispersant were
filtered by the developed filtration system. It was shown that a spiral guide rod
inserted into a ceramic tube filter is very effective for the cake-less continuous
filtration. This system achieves much higher filtration rate compared to a
conventional cross-flow filtration and we can collect much denser concentrate
continuously without any cake formation.
Keywords: dispersant, dynamic cross-flow filtration, purification, solid-liquid
separation, suspension, thickening, washing.
1 Introduction
Cake filtration is widely used in many industries to separate solid particles from
liquid. In cake filtration, a cake grows continuously on a filter media and the
filtration rate gradually decreases due to progressive increase in the cake
resistance. In order to reduce the resistance, flocculants are usually added in a
slurry. By adding flocculants, the filtration rate can be increased because the
formed cake has looser porous structure, therefore many researches have been
done to develop more effective flocculants. However, because of adding
flocculants, the packing fraction of the formed cake is always relatively low.
This means that the cake contains much water and the more time and cost are
spent for drying after filtration. In addition, the formed cake on the filter media
has to be scraped mechanically, which makes the system operate by batch
process.
Keywords
dispersant, dynamic cross-flow filtration, purification, solid-liquidseparation, suspension, thickening, washing.
Related Book
Other papers in this volume
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