导流筒结构对气升式反应器传质性能的影响研究  

Study on the effect of draft tube structure on mass transfer performance of airlift loop reactor

作　　者：李亮 郝润秋 郝亚超 师晓光 张成凯 LI Liang;HAO Runqiu;HAO Yachao;SHI Xiaoguang;ZHANG Chengkai(National Engineering&Technological research center for Industry Water Treatment,CNOOC Tianjin Chemical Research&Design Institute,Tianjin 300131,China)

机构地区：[1]中海油天津化工研究设计院有限公司国家工业水处理工程技术研究中心,天津300131

出　　处：《化学工业与工程》2024年第1期144-150,共7页Chemical Industry and Engineering

基　　金：重大科技项目(NOOC-KJ 145 FZDXM 00 TJY 003 TJY 2021)。

摘　　要：气升式环流反应器广泛应用于化工、环境等领域,深入研究反应器内气-液两相流体流动行为对提高其传质性能具有重要意义。通过分别建立气-液两相流模型和气泡粒群衡算模型并实现二者的耦合求解,研究了单个方形导流筒、单个圆形导流筒和6个圆形导流筒结构对气-液两相流体流动特性、气泡尺寸分布和气-液相间传质的影响。研究表明,含6个圆形导流筒结构的气升式环流反应器气含率和液相速度分布趋于均匀,平均气含率更大,气泡尺寸更小,传质速率更大,反应器的综合性能得到显著提升。相关模拟结果为气升式环流反应器结构优化和放大指明了方向。The airlift loop reactor is widely used in chemical industry,environment and other fields.It is important to study the gas-liquid two-phase flow behavior in the airlift loop reactor to improve its mass transfer performance.In this study,the gas-liquid two-phase flow model and bubble population balance model were developed to investigate the effects of a single square draft tube,a single circular draft tube and six circular draft tubes on the gas-liquid two-phase flow characteristics,bubble size distribution and gas-liquid mass transfer.The results show that the airlift loop reactor with six circular draft tubes has lar-ger average gas holdup and smaller bubble size,thus providing improved mass transfer rate.The relevant simulation results are useful for the structural optimization and scale-up of the airlift loop reactor.

关 键 词：气升式环流反应器 计算流体力学 传质 数值模拟 

分 类 号：O359.1[理学—流体力学]