Abstract
A fibrous filter is a common cleaning device often used to remove particles from industrial gas streams. A fundamental question concerns the evolution of the filter performance under aerosol load and the prediction of its life time. The purpose of this paper is to illuminate some of the issues involved, in presenting our experiments of solid and liquid particle filtration. The evolution of pressure drop of HEPA filters is described in both cases and the deposit structure is analysed as precisely as possible.
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