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The "true" pore size of textile filter media and its relevance for the filtration process with respect to the interaction with apparatus and suspension

Anlauf, Harald


The success of a filtration process depends on the filter medium itself but also on the apparatus design and the process conditions. Here the discussion is focussed on woven media for cake filtration, but the principle findings seem to be transferable to vleeces depth filter media or membranes. Particle retention and the flow resistance are representing the main properties of a filter medium relevant for the filtration process. For an optimal filter operation further properties like mechanical strength, physical and chemical environment, wettability, tailormade fabrication and regenerability are of influence Particle retention and resistance of a filter medium are determined by pore size and structure and the interaction with the slurry. To characterize the pore size, the pore size distribution and the flow resistance different measuring techniques are available. The pore size can be measured often not directly and the question has to be answered how to correlate an indirectly measured „hydraulic pore diameter“ and the „true“ pore size. The bubble point respresents a physically definite pore size measuring method enabling the direct correlation with a shpere of definite size. ... mehr

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DOI: 10.5445/IR/1000063399
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mechanische Verfahrenstechnik und Mechanik (MVM)
Publikationstyp Proceedingsbeitrag
Publikationsjahr 2016
Sprache Englisch
Identifikator urn:nbn:de:swb:90-633991
KITopen-ID: 1000063399
Erschienen in Filtech 2016, 11. - 13. Oktober 2016, Köln [L11 / F1- Short Oral + Poster Presentations - Filter Media - Pore Size Analysis]
Schlagwörter filter media, pore size analysis, bubble point, filter media resistance
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