Solids mixtures produced in different fields of chemical engineering may be separated in their components by means of several techniques. Separation processes based on fluidization technology result promising. This contribution reports recent advances in the study of binary solids mixtures segregation in fluidized bed. It regards segregation assessment in a tapered fluidized bed and segregation modelling by adopting CFD simulation. A lab scale tapered fluidized bed was operated with bidisperse mixtures of particles characterized by equal densities and different sizes. The attention was focused on solids distribution in the classification apparatus and on the effects of the operating conditions. Components of binary mixtures may be successfully separated. The simulation of the segregating fluidized mixtures was carried out by means of commercial computing code as FLUENT 6.3, implementing a multi-fluid model. The simulation results were focused on the dynamics of the binary mixtures in a cylindrical column. Results of the experimental investigation and of the simulations have been critically analysed.
Solids mixtures segregation in fluidized bed / Olivieri, Giuseppe; A., Casillo; Marzocchella, Antonio; Salatino, Piero; P., Lettieri; L., Mazzei. - (2011), pp. 31-31. ( 12th Int. Conf. on Multiphase Flow in Industrial Plants. Ischia (NA) September 21-23, 2011).
Solids mixtures segregation in fluidized bed
OLIVIERI, GIUSEPPE;MARZOCCHELLA, ANTONIO;SALATINO, PIERO;
2011
Abstract
Solids mixtures produced in different fields of chemical engineering may be separated in their components by means of several techniques. Separation processes based on fluidization technology result promising. This contribution reports recent advances in the study of binary solids mixtures segregation in fluidized bed. It regards segregation assessment in a tapered fluidized bed and segregation modelling by adopting CFD simulation. A lab scale tapered fluidized bed was operated with bidisperse mixtures of particles characterized by equal densities and different sizes. The attention was focused on solids distribution in the classification apparatus and on the effects of the operating conditions. Components of binary mixtures may be successfully separated. The simulation of the segregating fluidized mixtures was carried out by means of commercial computing code as FLUENT 6.3, implementing a multi-fluid model. The simulation results were focused on the dynamics of the binary mixtures in a cylindrical column. Results of the experimental investigation and of the simulations have been critically analysed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
