Analysis of Hydrodynamic Similarity of Pressurized Three-Phase Slurry Bubble Column for its Design and Scale-up

가압 삼상슬러리 기포탑의 설계 및 Scale-up을 위한 수력학적 Similarity 해석

  • Seo, Myung Jae (Department of Chemical Engineering, Chungnam National University) ;
  • Lim, Dae Ho (Department of Chemical Engineering, Chungnam National University) ;
  • Jin, Hae Ryong (Department of Chemical Engineering, Chungnam National University) ;
  • Kang, Yong (Department of Chemical Engineering, Chungnam National University) ;
  • Jung, Heon (Synfuel Research Group, Korea Institute of Energy Research) ;
  • Lee, Ho Tae (Synfuel Research Group, Korea Institute of Energy Research)
  • 서명재 (충남대학교 화학공학과) ;
  • 임대호 (충남대학교 화학공학과) ;
  • 진해룡 (충남대학교 화학공학과) ;
  • 강용 (충남대학교 화학공학과) ;
  • 정헌 (한국에너지기술연구원 청정화석연료연구센터) ;
  • 이호태 (한국에너지기술연구원 청정화석연료연구센터)
  • Received : 2009.08.13
  • Accepted : 2009.09.15
  • Published : 2009.12.31

Abstract

Hydrodynamic similarity was investigated in pressurized three-phase slurry bubble columns by selecting the bubble holdup and pressure drop as objective functions, for the effective design and scale-up of it. In addition, effects of operating variables on the bubble holdup with variation of column diameter were also analyzed. Gas velocity($U_G$), viscosity(${\mu}_{SL,eff}$) and surface tension(${\rho}_{SL}$) of slurry phase, density difference between the slurry and gas phases(${\rho}_{SL}-{\rho}_G$) depending on the operating pressure, pressure drop per unit length(${\Delta}P/L$), column diameter(D) and gravitational acceleration(g) were chosen as governing parameters in determining the bubble holdup and pressure drop in the column. From the dimensional analysis, four kinds of dimensionless groups were derived from the 7 parameters and 4 fundamental dimensions. Effects of dimensionless groups such as Reynolds, Froude and Weber numbers on the bubble holdup in the column were discussed. The pressure drop and bubble holdup could be predicted from the correlation of dimensionless groups effectively, which could be used as useful information for the design and scale-up of pressurized slurry bubble columns.

Acknowledgement

Supported by : 한국에너지기술연구원

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