喷淋散射塔鼓泡区域的气液两相流动特性  

Gas-liquid Flow Characteristics in the Bubbling Region of Spray Scattering Column

作　　者：张忠培 董美蓉[1,2] 冯哲愚 李晓静 陆继东 ZHANG Zhong-pei;DONG Mei-rong;FENG Zhe-yu;LI Xiao-jing;LU Ji-dong(School of Electric Power,South China University of Technology,Guangdong Guangzhou 510641,China;Guangdong Province Engineering Research Center of High Efficient and Low Pollution,Guangdong Guangzhou 510640,China)

机构地区：[1]华南理工大学电力学院,广东广州510641 [2]广东省能源高效低污染转化工程技术研究中心,广东广州5106401

出　　处：《当代化工》2020年第3期539-543,共5页Contemporary Chemical Industry

基　　金：国家重点研发计划项目,项目号:2016YFB0600704.

摘　　要：为了探究喷淋散射脱硫塔鼓泡区域的气液两相流动特性,搭建了鼓泡塔实验台,在不同表观气速和气体分布器浸没深度的条件下进行了实验。实验结果表明:气体分布器表面形成的气泡直径约12 mm;气泡溢出液面时有小气泡形成,并随着返混的液相运动,且液相的返混剧烈程度与表观气速和气体分布器浸没深度正相关;液相在散射管管壁和鼓泡池壁面间形成大尺度循环;随着表观气速增大,气泡直径和气泡运动速度均增大,使得气含率增大,气液两相湍动加剧;随着气体分布器浸没深度增大,鼓泡床床层气含率降低,表观气速对气含率的影响效果减弱。实验结果对喷淋散射脱硫塔的设计和运行有一定参考价值。In order to explore the gas-liquid two-phase flow characteristics in the bubbling region of spray scattering desulfurization column,a bubbling tower experimental platform was built.Experiments were carried out under the conditions of different superficial gas velocity and gas distributor submersion depth.The results showed that,the diameter of bubbles formed on the surface of gas distributor was about 12 mm.Small bubbles formed when bubbles overflowed the liquid surface,and they moved along with the backmixing liquid phase,and the backmixing intensity of liquid phase was positively correlated with the superficial gas velocity and the immersion depth of gas distributor.The liquid phase circulated between the scattering tube wall and the bubbling pool wall.With the increase of superficial gas velocity,bubble diameter and bubble velocity increased,which made the gas holdup increase and the turbulence of gas-liquid two phases intensify.As the immersion depth of gas distributor increased,the gas holdup of bubbling bed decreased,and the effect of superficial gas velocity on gas holdup decreased.The experimental results are valuable for the design and operation of spray scattering desulfurization tower.

关 键 词：鼓泡塔 气液两相流 气体分布器 气泡 表观气速 

分 类 号：TQ021.1[化学工程]