The Analysis of Slugging Phenomena in Fluidized Beds

Abstract

This paper is concerned with the behavior of slugs and pressure pulsation in slugging beds.
A slugging state, which is composed of a pair of slugs, namely a stationary slug and a dynamic slug, and hence is different from that defined by Stewart and Davidson, was newly found and the following results were obtained.
(1) The frequency of slug formation can be determined by the rising velocity of a dynamic slug, the height of formation of a stationary slug and the height of a fixed bed.
(2) The periodical motion of these slugs can be explained by assuming that there is a part of non-fluidized state just under the rising dynamic slug.
A theoretical equation for predicting pressure fluctuation at the bottom of the bed was derived, based on these results and confirmed by experiment.