Gas–Liquid–Solid Fluidization Engineering by Liang-Shih FAN, Howard Brenner

By Liang-Shih FAN, Howard Brenner

This booklet presents a entire mechanistic interpretation of the shipping phenomena desirous about a variety of easy modes of gas-liquid-solid fluidization. those modes comprise, for instance, these for three-phase fluidized beds, slurry columns, turbulent touch absorbers, and three-phase fluidized beds, slurry columns, turbulent touch absorbers, and three-phase delivery. It summarizes the empirical correlations necessary for predicting shipping houses for every mode of of operation.

Gas-Liquid-Solid Fluidization Engineering presents a complete account of the cutting-edge functions of the three-phase fluidization structures which are very important in either small-and large-scale operations. those purposes contain fermentation,
biological wastewater remedy, flue gasoline desulfurization and particulates removing, and resid hydrotreating. This e-book highlights the commercial implications of those purposes. additionally, it discusses info gaps and destiny instructions for
research during this field.

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The bed height can be determined either from visual observation or from the pressure distribution curves as reported by Kim et al. (1972) and Bhatia and Epstein (1974). The determination of bed height based on visual observation is reasonably accurate for large/heavy particle beds due to existence of a distinct bed surface. In contrast, visual observation becomes quite subjective and unreliable for small/light particle beds due to an indistinct bed surface caused by the considerable entrainment of particles into the freeboard region.

6 5 + 20 d /D P c n = ( 4 . 4 + 18d /D )Re ' p c t n = ( 4 . 4 + 18d /D )Re,. p c t n = 4 . 4 Re. 2 < Re 1 < Re < 1 < 200 200 < Re < 500 500 < Re, where Re t = U t d p p ^ u , Several investigators considered the effect of particle shape on the solids holdup behavior (Soung, 1978; Saberian-Broudjenni et al. , 1987). For systems using nonspherical particles, such as extrudates in cylindrical shape, Song and Fan (1986b) reported that Begovich and Watson's (1978a) correlation can be modified to account for the bed expansion characteristics by replacing the particle diameter d by a product of the equivalent particle diameter and sphericity, (d ).

1 Pressure Drop The pressure drop through the bed is strongly related to the individual phase holdups in the bed. 5), the volume fraction of the solids, or solids holdup, can be expressed in terms of the total mass of solids (W ), the solid density (p ), the cross section of the column (A), and the effective bed height (H) as 1: Throughout this chapter, small or small/light particles refer to fluidized bed particles with a terminal velocity in water of less than about 30 cm/s, whereas large or large/heavy particles refer to fluidized bed particles with a terminal velocity in water of larger than about 30 cm/s, unless otherwise noted.

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