Bubble formation and detachment behaviors on surface layer of packed particles

被引：0
|
作者：
Wei N. [1 ]
Wu X. [1 ]
Bo Y. [1 ]
Liu P. [1 ]
Ma J. [1 ]
机构：
[1] School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2021年 / 40卷 / 02期
关键词：
Bubble; Bubble column reactor; Detachment diameter; Formation period; Multiphase flow;
D O I：
10.16085/j.issn.1000-6613.2020-0671
中图分类号：
学科分类号：
摘要：
The bubble formation and detachment behaviors on the surface layer of packed particles were studied experimentally. The effects of nozzle diameter, packed bed height and particle size on the bubble detachment diameter and the formation period were revealed by using the high-speed camera technology. The differences of bubble formation and detachment behaviors on the surface layer of packed bed and the nozzle were analyzed. The results showed that the initial shape of the bubble generated on the surface of packed bed with the particle size in the range of 1500-3000μm was relatively flat and small, and the evolution of bubble to flat shape was faster. The effect of intake flow rate on the bubble shape was weakened with the increase of particle size. And the increase of nozzle diameter and packed bed height could effectively promote the growth of bubble detachment diameter, but delayed the formation and detachment of bubble and increased the bubble formation period. The effect of particle size on the bubble formation period diminished gradually with the increase of intake flow rate. There was a significant difference between the bubble formation and detachment behaviors on the surface of packed bed and the nozzle. In contrast, the packed bed with the particle size in the range of 150-300μm had a more obvious hindering effect on the formation and detachment of bubble, and the detachment diameter and the formation period of bubble were relatively large. © 2021, Chemical Industry Press Co., Ltd. All right reserved.
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页码：678 / 687
页数：9
相关论文
共 33 条
  • [1] CHAO Cong, XU Xu, KWELLE S O, Et al., Significance of gas-liquid interfaces for two-phase flows in micro-channels, Chemical Engineering Science, 192, pp. 114-125, (2018)
  • [2] YAO Chao, LI Huixiong, XUE Yuqing, Et al., Investigation on the frictional pressure drop of gas liquid two-phase flows in vertical downward tubes, International Communications in Heat and Mass Transfer, 91, pp. 138-149, (2018)
  • [3] ALIYU M A, BABA Y D, LAO L Y, Et al., Interfacial friction in upward annular gas-liquid two-phase flow in pipes, Experimental Thermal and Fluid Science, 84, pp. 90-109, (2017)
  • [4] LIU Chun, WANG Congcong, CHEN Xiaoxuan, Et al., Biological nitrogen removal process in a microbubble-aerated biofilm reactor treating low C /N wastewater, Environment Science, 40, 2, pp. 754-760, (2019)
  • [5] ZHAN Junwei, CHEN Zhuo, ZHAN Xu, Et al., Studies on the performance of bionic aquatic filler biological contact oxidation tank for wastewater treatment based on microbubble aeration, Environmental Pollution & Control, 40, 2, pp. 217-221, (2018)
  • [6] SU Yanqi, Measures on improving yield of flotation deinking, Oversea Technology, 31, 16, pp. 78-81, (2010)
  • [7] WANG Shuai, LI Pan, YU Shuili, Characteristics of microbubbles and their applications in environmental management, China Water and Wastewater, 29, 20, pp. 22-25, (2013)
  • [8] HUBER M, DOBESCH D, KUNZ P, Et al., Influence of orifice type and wetting properties on bubble formation at bubble column reactors, Chemical Engineering Science, 152, pp. 151-162, (2016)
  • [9] LI Meng, LI Xiangyang, WANG Hongzhi, Et al., Numerical simulation of different traction force models for gas-liquid two-phase flow in bubble tower, The Chinese Journal of Process Engineering, 15, 2, pp. 181-189, (2015)
  • [10] ZIEGENHEIN T, LUCAS D., Observations on bubble shapes in bubble columns under different flow conditions, Experimental Thermal and Fluid Science, 85, pp. 248-256, (2017)
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