Development of a Bubble Column with a Gas–Liquid Simultaneous Injection Nozzle and a Downcomer for the Ozone Oxidation Method

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Keiji Yasuda²  Masaaki Nakamura¹  Yoshiyuki Bando¹  Kazuyoshi Doi¹  Tetsuhiro Sasagawa¹ 

[1] Department of Chemical Engineering, Nagoya University;Waste Treatment Facility, Nagoya University

关键词: Bubble Column;    Simultaneous Injection Nozzle;    Downcomer;    Ozone Oxidation;    Dye Decomposition;   

DOI  :  10.1252/jcej.37.1062

来源: Maruzen Company Ltd

【 摘 要 】

References(10)For the enhancement of ozone oxidation performance, a gas–liquid simultaneous injection nozzle was set at the upper end of the downcomer of bubble column. The flow characteristics and the decomposition performance were examined. Gas and liquid from the nozzle flowed downward in the downcomer and upward in the annulus between the column and the downcomer. A part of liquid in the annulus was entrained into the downcomer. Both the liquid circulation flow rate and volumetric mass transfer coefficient increased with increasing downcomer diameter and with decreasing nozzle diameter. In the dye decomposition by means of air containing ozone, the decomposition conversion of dye was enhanced by the liquid entrained from the annulus to the downcomer at the upper end of the downcomer. On the basis of the balance equations of ozone and dye, the concentration distributions of ozone and dye, and the decomposition conversion of dye were calculated by using the flow characteristics.

【 授权许可】

Unknown