Hydrodynamics in a new liquid–solid circulating conventional fluidized bed

Jingya Fu, Xinyu Pan, Zeneng Sun, Ruoting Liu, Ying Zheng, Jesse Zhu

Research output: Journal PublicationArticlepeer-review

1 Citation (Scopus)


A new type of liquid–solid fluidized bed, named circulating conventional fluidized bed (CCFB) which operates below particle terminal velocity was proposed and experimentally studied. The hydrodynamic behavior was systematically studied in a liquid–solid CCFB of 0.032 m I.D. and 4.5 m in height with five different types of particles. Liquid–solid fluidization with external particle circulation was experimentally realized below the particle terminal velocity. The axial distribution of local solids holdup was obtained and found to be fairly uniform in a wide range of liquid velocities and solids circulation rates. The average solids holdup is found to be significantly increased compared with conventional fluidization at similar conditions. The effect of particle properties and operating conditions on bed behavior was investigated as well. Results show that particles with higher terminal velocity have higher average solids holdup.

Original languageEnglish
Pages (from-to)20-29
Number of pages10
Publication statusPublished - Nov 2022
Externally publishedYes


  • Circulating conventional fluidized bed (CCFB)
  • Operating conditions
  • Particle properties
  • Solids circulation rate
  • Solids holdup
  • Superficial liquid velocity

ASJC Scopus subject areas

  • Chemical Engineering (all)
  • Materials Science (all)


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