Bed expansion of liquid‐solid inverse fluidization

Abstract

The bed expansion characteristics of two-phase inverse fluidization were studied.

Hydrodynamic characteristics of a three‐phase inverse fluidized‐bed column

“…The minor differences between the operating regimes reported in these publications can be attributed to differences in equipment, such as the gas and liquid distributors. Investigation of the bed-expansion characteristics has led to the development of some semiempirical models for two-phase beds (Fan et al, 1982a;Karamanev and Nikolov, 1992) and three-phase beds (Legile et al, 1988). Bed voidage and phase holdups were also measured in a limited number of particle systems (Fan et al, 1982a;Legile et al, 1988).…”

“…In all of the studies just cited, the expanded bed height was obtained from either visual observations (Legile et al, 1988;Karamanev and Nikolov, 1992), or from the static pressure profile (Fan et al, 1982a;Legile et al, 1988). Visual observations may be suitable when the bed surface fluctuations are moderate, that is, in the absence of gas.…”

Free rising spheres do not obey newton's law for free settling

“…Recently, hydrodynamic investigations of a newly invented multiphase system, the inverse fluidized bed, were performed (Karamanev and Nikolov, 1992). The inverse fluidized bed consists of fluid (usually liquid) and light solid particles.…”

Modified gas‐perturbed liquid model (GPLM) for minimum fluidization velocity in a two‐phase inverse fluidized bed reactor with Newtonian and non‐Newtonian systems

“…2,3 Inverse fluidization plays an important role in achieving biofilm thickness control in a very narrow range. 4 Karamanev and Nikolov 5 studied the bed expansion characteristics of two-phase inverse fluidization using 12 different spheres with diameters from 1.31 to 7.24 mm and densities between 75 and 930 kg m −3 and water. The hydrodynamics of two-phase and three-phase inverse fluidized bed reactors have been reported in the literature.…”