Study of local powder mixing in a screw reactor using image processing
Résumé
Objectives
Screw reactors are largely used devices in the industry. Few studies focus on the
powder hydrodynamic in these reactors and even fewer at a local scale. Knowing the
exposure time of the bed to the gaseous atmosphere is crucial to understand gas/solid
mass and heat transfer. Therefore, a simple method is proposed to measure this
parameter. The heap surface of one pitch is sprinkled with the studied powder colored
in blue (Figure 1a). An optical device, moving at the screw speed, was developed in
order to focus on the sprinkled heap surface. Therefore, the camera follows the
renewal speed of this surface during the screw rotation (Figure 1b and c). Using an
image processing code, the blue proportion on the heap surface is determined over
time, giving the heap surface renewal speed
Domaines
Génie des procédésOrigine | Fichiers produits par l'(les) auteur(s) |
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