Dynamic Characteristics of Bed Collapse in Three-phase Fluidized Beds

Dong Hyun Lee, Sung Soo Park, Won Woong Choi, Duk Joon Kim, Ji Heung Kim, Young Kwan Lee, Sang Jun Sim, Sang Done Kim

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Transient behavior of the bed collapse after shut-off the gas supply into a three-phase fluidized bed was determined. Experiments were carried out in a 210-mm diameter half-tube acrylic column having a 1.8 m-high test section. The polymer beads (dp=3.2 mm, ρs=1,280kg/m3) were fluidized by cocurrent flow of deionized water and air. The transient behavior of the bed collapse after cut-off the gas supply to the bed was monitored by a video camera (30 frames/s). The dense bed surface height was measured from the image of videotape. At lower liquid velocity, the dense bed surface increases with the elapsed time and then reaches a bed height, whereas at higher liquid velocity the dense bed surface increases sharply with the elapsed time, then decreases and reaches the bed height corresponding to the liquid-solid fluidized beds (water-polymer beads).

Original languageEnglish
Pages (from-to)1166-1169
Number of pages4
JournalKorean Journal of Chemical Engineering
Volume20
Issue number6
DOIs
Publication statusPublished - 2003 Nov
Externally publishedYes

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Keywords

  • Bed Collapse
  • Dense Bed Height
  • Dynamic Characteristics
  • Three-Phase Fluidized Beds

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Lee, D. H., Park, S. S., Choi, W. W., Kim, D. J., Kim, J. H., Lee, Y. K., Sim, S. J., & Kim, S. D. (2003). Dynamic Characteristics of Bed Collapse in Three-phase Fluidized Beds. Korean Journal of Chemical Engineering, 20(6), 1166-1169. https://doi.org/10.1007/BF02706956