Pressure and flow characteristics of a gas phase spout‐fluid bed and the minimum spout‐fluid condition

Abstract

Abstract Spoutfluidization is a new technique for solid‐fluid contact which aims at incorporating the advantages of spouted bed and fluidized bed technique. The characteristics of physical state of the bed with the variation of the variables which include flow of fluid, particle diameter, orifice diameter, bed height, are studied in this investigation. Experimental study of minimum spoutfluidizing velocity using glass beads with mean particle diameters from 0.254 to 0.600 mm has been carried out in a 90 mm glass column with three spouting inlet orifice sizes at different bed heights. Phase diagrams indicate that the minimum spout‐fluid flow rate in a gas‐solid system may be a point property for a given bed. A correlation is presented in which the standard deviation of experimental from calculated minimum spoutfluidizing velocity is within 5%.