Stochastic Analysis of Gas-Liquid-Solid Flow in Three-Phase Circulating Fluidized Beds

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

PUNG SUP SONG¹  SUNG HOON KIM¹  YONG JUN CHO¹  SANG DONE KIM²  YONG KANG¹ 

[1] Department of Chemical Engineering, Chungnam National University;Department of Chemical Engineering, KAIST

关键词: Three-Phase;    Circulating Fluidized Bed;    Phase Holdup;    Pressure Fluctuations;    Stochastic Analysis;   

DOI  :  10.1252/jcej.34.254

来源: Maruzen Company Ltd

【 摘 要 】

References(21)Cited-By(19)Characteristics of gas-liquid-solid flow behavior in a riser are investigated in a three-phase circulating fluidized bed (0.102 m I.D.×3.5 m in height). Local gas holdup, solid holdup distribution, and pressure fluctuations in the riser have been measured and utilized to describe the gas-liquid-solid flow behavior more conveniently. The resultant pressure fluctuations have been analyzed by adopting the chaos method: The time series of pressure fluctuations have been interpreted by means of phase space portraits and Kolmogorov entropy. The effects of gas and liquid velocities and solid circulation rate on the local gas holdup, solid axial distribution, phase space portrait, and Kolmogorov entropy of pressure fluctuations, as well as on the flow behavior of gas-liqid-solid mixture in the riser are determined. It is found that pressure fluctuations can be a quantitative tool to characterize the flow behavior and flow regime transition of multiphases in the riser. The relations between the pressure fluctuations and the distribution of phase holdup and flow regime in the riser are also discussed.

【 授权许可】

Unknown