Liquid Circulation Flow in a Rectangular Airlift Bubble Column

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Lingguang Meng¹  Masaaki Nakamura¹  Shin-ichi Hamano¹  Yoshiyuki Bando¹  Yusuke Oura¹ 

[1] Department of Chemical Engineering, Nagoya University

关键词: Rectangular Bubble Column;    Airlift;    Gas Holdup;    Liquid Circulation Flow Rate;    Energy Balance;   

DOI  :  10.1252/jcej.38.1015

来源: Maruzen Company Ltd

【 摘 要 】

References(14)Cited-By(1)The effects of equipment dimensions and operation conditions on the liquid circulation flow rate in a rectangular airlift bubble column were investigated at relatively low gas velocities, at which few bubbles were entrained into the downcomer. The gas holdup in the downcomer was almost zero, and the gas holdup in the riser decreased with increasing length between the upper end of the partitioning plate and the liquid surface during aeration (upper clearance) and with increasing length of the partitioning plate. The liquid circulation flow rate increased with increasing upper clearance, and became constant when the clearance exceeded a certain value. The loss coefficient in the zone above the upper end of the partitioning plate was a function of the upper clearance and the riser width. By using the energy balance and experimental equations the liquid circulation flow rate was calculated, and the results agreed with the measured data within an error of +30%.

【 授权许可】

Unknown