微曝氧化沟气液两相传质模型构建及传质影响因素分析

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刘凤霞，李永强，许晓飞，董鑫，刘志军*

大连理工大学

收稿日期:2018-11-01修回日期:2018-12-12出版日期:2019-08-22发布日期:2019-08-15
通讯作者:李永强

基金资助:国家自然科学基金项目;教育部留学回国人员科研启动基金项目;辽宁省博士科研启动基金项目

Model construction and influence factor analysis of gas-liquid mass transfer in a fine-bubble oxidation ditch

Fengxia LIU, Yongqiang LI, Xiaofei XU, Xin DONG, Zhijun LIU*

Research & Design Institute of Fluid and Powder Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China

Received:2018-11-01Revised:2018-12-12Online:2019-08-22Published:2019-08-15

摘要/Abstract

摘要： 基于ANSYS Fluent软件建立了微曝氧化沟气–液两相流动和溶解氧输运模型，对比不同工况下氧体积传质系数的实验测量值和模拟结果，误差在7%以内。采用验证可靠性的模型模拟研究了气泡直径、曝气量和横向流动速度对微曝氧化沟内氧传质的影响。结果表明，气泡直径由1.5 mm增至3 mm时，氧体积传质系数由15.80 h?1降低至5.83 h?1；曝气量由0.5 m3/h增大至2 m3/h时，氧体积传质系数由4.21 h?1增至14.15 h?1，减小气泡直径和增大曝气量能明显提高氧体积传质系数。微曝氧化沟内气–液相间传质及溶解氧的分布受横向流动影响，开启单台和两台推流泵时，氧体积传质系数分别比无横向推流工况增大27.7%和42.4%，横向流动能有效提高气泡羽流内的气含率，增强氧传质效果。

引用本文

刘凤霞李永强许晓飞董鑫刘志军. 微曝氧化沟气液两相传质模型构建及传质影响因素分析[J]. 过程工程学报, 2019, 19(4): 676-684.
Fengxia LIU Yongqiang LI Xiaofei XU Xin DONG Zhijun LIU. Model construction and influence factor analysis of gas-liquid mass transfer in a fine-bubble oxidation ditch[J]. Chin. J. Process Eng., 2019, 19(4): 676-684.

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