Experimental investigation of the effects of particle properties on solids holdup in an LSCFB riser

Long Sang, Jesse Zhu

Research output: Journal PublicationArticlepeer-review

18 Citations (Scopus)

Abstract

The effects of particle properties (density and size) on solids holdup (e{open}s) in the riser of a Liquid-Solid Circulating Fluidized Bed (LSCFB) were investigated experimentally based on three parameters: the superficial liquid velocity (Ul), the normalized superficial liquid velocity (Ul/. Ut) and the excess superficial liquid velocity (Ul- Ut). The results showed that the excess superficial liquid velocity (Ul- Ut) among those three parameters is a more appropriate parameter to evaluate the effects of the particle properties on the solids holdup (e{open}s), facilitating general and direct comparisons for different types of particles. A discussion on the force balance of the particles revealed that the excess superficial liquid velocity (Ul- Ut) is approximately equivalent to the average particle velocity (VP) when the solids holdup (e{open}s) is less than 0.1. Also the solids holdup (e{open}s) is a function of superficial solids velocity (Us) and particle velocity (Vp), expressed quantitatively in terms of average value as εs=Us/VP=Us/(Ul-Ut) when εs<0.1.

Original languageEnglish
Pages (from-to)322-329
Number of pages8
JournalChemical Engineering Journal
Volume197
DOIs
Publication statusPublished - 15 Jul 2012
Externally publishedYes

Keywords

  • Excess superficial liquid velocity
  • Liquid-Solid Circulating Fluidized Bed (LSCFB)
  • Normalized superficial liquid velocity
  • Particle properties
  • Particle velocity
  • Solids holdup
  • Terminal velocity

ASJC Scopus subject areas

  • Chemistry (all)
  • Environmental Chemistry
  • Chemical Engineering (all)
  • Industrial and Manufacturing Engineering

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