Quantitative Charakterisierung der inhomogenen Anströmung der Filterschicht bei der Staubabscheidung mit Oberflächenfiltern unter Verwendung von Markerpartikeln – Teil 1: Das methodische Vorgehen Quantitative Characterization of the Inhomogeneous Inflow of the Filter Layer During Dust Collection with Surface Filters Using Marker Particles – Part 1: Methodical Approach

Abstract

During dust separation with surface filters, the inhomogeneous structure of the filter medium leads to corresponding local inhomogeneous inflow conditions over the surface of the filter layer. These local inhomogeneous inflow conditions change with increasing dust loading on the filter layer, since the deposition of gas-borne dust particles on the filter layer causes additional flow resistance, thus evening out the local differences. A new approach for the experimental investigation of these inhomogeneous inflow conditions during dust collection with surface filters, which includes a targeted sample preparation with so-called marker particles, a coordinated image analysis, and a correspondingly developed evaluation method, is presented and discussed using the example of a selected needled felt filter medium.