Mean Residence Time and Residence Time Distribution When Sawdust Is Dried in Continuous Dryers

Abstract

Information on the mean residence time and the residence time distribution is of importance when optimizing a continuous dryer. In this study, an industrial method for determining the mean residence time is developed. The produced method is benchmarked on a laboratory scale against the stop-and-empty method. The method, which uses LiCl as the tracer does not cause any disturbances in the biofuel drying or pelleting processe.

Keywords:

• Biomass
• Industrial dryer
• Residence time
• Sawdust
• Spouted bed
• Stop and empty
• Tracer