Estimation of Local Superficial Gas Velocity in Slurry Bubble Columns Using a Triple Electroresistivity Probe

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Makoto Yoshimoto²  Katsumi Nakao²  Tetsuya Imura²  Fumio Azakami²  Keiji Furumoto¹  Toru Hasuoka² 

[1] Oshima National College of Maritime Technology;Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering, Yamaguchi University

关键词: Triple Electroresistivity Probe;    Local Gas Velocity;    Slurry Bubble Column;    External Loop Airlift.;   

DOI  :  10.1252/jcej.07WE104

来源: Maruzen Company Ltd

【 摘 要 】

References(6)Cited-By(1)In the present study, the local superficial gas velocity was calculated as a sum of the contributions of the size and frequency, or the rise velocity and gas holdup, of the individual bubbles rising vertically through the probe. A correction factor αi for any detected bubble i was needed to take into account the probability that some of the bubbles vertically approaching the probe might not be detected due to the chaotic behaviors of bubbles and liquid. The reciprocal of αi was regarded as the bubble detection efficiency of the probe. The value of αi was assumed to be specific to the gas–liquid flow pattern, i.e., the bubble, churn-turbulent or slug flow. As a result, the effects of the various operating conditions on the radial distribution of the gas velocity were determined. The distribution was found to be more remarkable for the higher superficial gas velocity and for the smaller column diameter.

【 授权许可】

Unknown