Transport Phenomena around Cylindrical Baffles in an Agitated Vessel Measured by an Electrochemical Method

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Noboru Kamei³  Young-Sei Lee²  Shuichi Iwata⁴  Yuichiro Nagatsu⁴  Yutaka Tada⁴  Song-Tae Koh¹  Yoshihito Kato⁴  Yushi Iwasaki⁴ 

[1] Department of Bio-Chemical Engineering, Dongyang University;Department of Chemical Engineering, Sangju National University;Daicel Chemical Ltd.;Department of Applied Chemistry, Nagoya Institute of Technology

关键词: Mixing;    Mass Transfer;    Heat Transfer;    Baffle;    Cylindrical Baffle;   

DOI  :  10.1252/jcej.40.611

来源: Maruzen Company Ltd

【 摘 要 】

References(10)Cited-By(5)The mass transfer coefficient of cylindrical baffles in an agitated vessel has been measured for the first time with the constant potential method using aqueous solution of 1 N-KOH + 0.2 N-K4Fe(CN)6 + 0.01 N-K3Fe(CN)6. The average mass transfer coefficient on the baffles was three to five times larger than that of the vessel wall based on the power consumption per unit volume. The average mass transfer coefficient on the baffles increased with decreasing baffle diameter. The number of baffles, the clearance between the baffles and vessel wall, the position of the baffles and the position of the impeller did not affect the average mass transfer coefficient of the baffles under these experimental conditions. The average mass transfer coefficient of the cylindrical baffles measured herein agrees with the value obtained by an equation based on one published before. The distributions of the local mass transfer coefficient of the cylindrical baffles are shown graphically for various impeller speeds. The local mass transfer coefficient of the baffles near the impeller was larger than those in other positions, and that near the liquid free surface increased up to the same level as that of the baffles near the impeller as the impeller speed increased.

【 授权许可】

Unknown