Study of Distribution and Stability of Solid Particles in a Spouted Bed

Abstract

The present work is a part of scale-up methodology. the selected key parameter of the scale-up process is the solid particles' concentration distribution in the spouted bed. Steady-state measurements were carried out to study the solid particle's behaviors in the 60° conical shape spout-air bed with the diameter of 3 inches and height of 36 inches. Radial concentration of particles (glass and steel beads) at various elevations of the bed under different flow patterns were measured using sophisticated optical probes. the superficial air velocity and particles' densities were selected as the effective variables on the particles' distribution and stability into the spouted bed. the hydrodynamic parameters of the spouted process are difficulty to be measured at the unstable conditions. a stable bed is obtained when the beads can fluidize homogenously. the stable spouting is distinguished by the formation of the stable fountain. Unstable spouting is characterized by swirling and pulsation of the spout. the homogeneity and stability of solid particles appeared at the annular region within the position of 5.5 inches above the conical base. the results showed that decreasing in superficial air velocity could promote the solids' concentration, uniformity and stability in the annular region of the bed. in addition, it has been found that high beads' concentration and stable flow can be obtained with high-density particles.

Department(s)

Chemical and Biochemical Engineering

Keywords and Phrases

Solid particles' distribution; Spouted bed; Stability

International Standard Book Number (ISBN)

978-081691073-1

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 American Institute of Chemical Engineers, All rights reserved.

Publication Date

01 Dec 2012

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