Experimente zum Partikelfluss an einer neu entwickelten Geometrie für Dächerschachttrockner

Abstract

To preserve large mass flows of grain for long term storage, mixed-flow dryers (MFD) are increasingly used worldwide. Design elements which are unfavorably constructed or arranged can cause broad residence time distributions. Hence, locally different drying conditions occur followed by inhomogeneous drying. As a result, the specific energy consumption increases accompanied by economic and quality losses. With the objective of saving product quality and increasing energy efficiency a new dryer geometry was developed. To compare and evaluate the new design with the traditional geometry regarding solids transport, a series of semi-technical particle flow experiments were performed using wheat as bed material and colored tracer particles.