交错多级内环流反应器气泡分布研究  

Research of bubble distribution ina staggered multistage internal airlift loop reactor

作　　者：潘庆鹏 王伟文[1] Pan Qingpeng;Wang Weiwen(College of Chemical Engineering,Qingdao University of Science&Technology,Qingdao,Shandong 266000)

机构地区：[1]青岛科技大学化工学院,山东省青岛市266000

出　　处：《炼油技术与工程》2024年第8期11-14,共4页Petroleum Refinery Engineering

基　　金：山东省自然科学基金面上项目(ZR2020MB143)。

摘　　要：环流反应器因其独特的循环特性和高效的传质效率,在生物工程、环境工程和化学工程等领域具有巨大的应用潜力。由于对其的研究聚焦于宏观流体力学行为上,针对气泡直径分布的研究对于反应器的设计优化与规模化放大具有深远意义。借助计算流体力学(CFD)与群体平衡模型(PBM),深入探究交错多级内环流反应器内气泡直径分布。研究发现:上升区和下降区存在明显的气含率差异;各级上升区气含率沿轴向表现出不同的变化趋势;对于下降区,气含率沿着轴向高度的增加而增加;反应器内大气泡(直径11.56~14.98 mm)主要集中在第二级和第三级上升区,较小尺寸的气泡(直径0.67~1.13 mm)主要存在于第一级和第三级下降区的底部。Due to its unique circulation characteristics and high mass transfer efficiency,the loop reactor has shown great application potential in the fields of bioengineering,environmental engineering and chemical engineering.The research on it focuses on macroscopic fluid dynamics behavior,and the study of bubble diameter distribution has profound significance for the design optimization and scale up of reactors.To investigate the diameter distribution of bubbles in a staggered multistage internal airlift loop reactor in depth,this paper utilizes computational fluid dynamics(CFD)and population balance model(PBM).Research has found that there is a significant difference in gas holdup between the rising and falling zones;the gas holdup in each stage of rising zone shows different changing trends along the axis,and the gas holdup in the falling zone increases along the axial height.The large bubbles(with a diameter of 11.56-14.98 mm)in the reactor are mainly concentrated in the rising zones of the second and third stages,while the smaller bubbles with a diameter of 0.67-1.13 mm mainly exist at the bottom of the falling zones of the first and third stages.

关 键 词：交错 多级 内环流反应器 气泡分布 气含率 气泡直径 流体动力学 群体平衡模型 

分 类 号：TQ021.1[化学工程]