Abstract
Solid–liquid mixing is a common industrial operation conducted in processes, such as slurry preparation, polymerization, and crystallization. Thus, many studies have investigated the just suspension speed, solid concentration distribution and solid–liquid mass transfer. However, most were done for single impeller systems and few for multi-stage impeller ones. In this study, we examined the suspension of solid particles in a vessel equipped with dual traditional impellers. The combination of the impellers and the optimal installed position were investigated. As a result, it was found that the optimal combination of traditional impellers is one of a pitched paddle pumping down in the lower position and a pitched paddle pumping up in the upper one, and that the optimal clearance of dual impellers is equal to vessel diameter.
