EXPERIMENTAL STUDIES OF ELECTRIC CONDUCTIVITY DISTRIBUTION ALONG THE HEIGHT OF THE FLUIDIZED BED

Abstract

This work is focused on the experimental research into the electrical conductivity of a fluidized bed with graphite particles. The aim of the study is to determine the change in electrical conductivity along the height of the fluidized bed. The study was carried out on a chamber-type unit with a working space diameter 110 mm at a fluidization index 2-3. As a result of the experimental research, during heating in electrothermal fluidized bed, the uneven distribution of electrical resistance along the bed height was confirmed for the first time. The resistivity value increases 3-5 times with the depth of immersion into the bed from its surface. The unevenness of the resistivity along the height of the bed decreases with increasing temperature. The difference in power distribution due to uneven electrical resistance along the bed height can lead to a temperature difference of several tens of degrees.