摘要
反应釜是气液两相反应过程中的核心设备,其内部复杂的流场特性对反应效率和产品质量有着至关重要的影响。由于实验手段在捕捉和分析反应釜内气液两相流的细微特征上存在一定局限,因此数值模拟方法成为研究该领域的重要工具。文中建立了气液两相反应釜的两种不同叶浆的三维模型,利用FLUENT软件进行了气液两相流仿真模拟,在模拟湍流运动时选用了K-epsilon湍流模型。重点分析了两种组合四层桨叶装置在反应釜内的流场特性和气体分布情况,基于两种叶浆的气液两相分布变化、气相均匀性、流场速度分布变化以及速度矢量分布变化等进一步分析了四宽叶浆和四斜叶浆的差异。最终得出在同一搅拌釜、同一转速、相同桨径条件下,四宽叶桨在排量、平均速度和功耗方面均优于四斜叶桨,且四宽叶桨还有助于提高釜内的流动均匀性,可进一步促进气液两相的混合。
The reactor is the core equipment in the gas-liquid two-phase reaction process,and the complex flow field characteristics inside it have a crucial impact on the reaction efficiency and product quality.Due to the limitations of experimental methods in capturing and analyzing the subtle features of the gas-liquid two-phase flow within the reactor,numerical simulation methods have become an important tool for researching this field.In this paper,two different impeller models of gas-liquid two-phase reactors were established,and gas-liquid two-phase flow simulation was carried out using FLUENT software.The K-epsilon turbulence model was selected for simulating turbulent motion.The flow field characteristics and gas distribution in the reactor of two types of four-layer impeller devices were analyzed in detail.Based on the changes in gas-liquid two-phase distribution,gas uniformity,flow field velocity distribution and velocity vector distribution of the two impellers,the differences between the four wide-blade impeller and the four inclined-blade impeller were further analyzed.Finally,it was concluded that under the same reactor,the same rotational speed and the same impeller diameter,the four wide-blade impeller is superior to the four inclined-blade impeller in terms of discharge,average velocity and power consumption,and the four wide-blade impeller also helps to improve the flow uniformity in the reactor,which can further promote the mixing of gas-liquid two phases.
作者
孔峻松
李梦丽
白晨辉
张明
廉哲
孙奎峰
宿艳彩
国洪猛
KONG Junsong;LI Mengli;BAI Chenhui;ZHANG Ming;LIAN Zhe;SUN Kuifeng;SU Yancai;GUO Hongmeng(Faculty of Mechanical Engineering,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250353,China;School of Mechanical Engineering,Hefei University of Technology,Hefei,230002,China;Weihai Chemical Machinery Co.,Ltd.,Weihai 264203,China;Weihai Xintai Chemical Machinery Co.,Ltd.,Weihai,264203,China)
出处
《齐鲁工业大学学报》
2025年第5期10-19,共10页
Journal of Qilu University of Technology
基金
山东省重点研发计划资助项目(2024TSGC0700)
校(院)地产学研协同创新基金项目(2022CXY-02)
威海市科技发展计划项目(2022KC02)
齐鲁工业大学(山东省科学院)科教产融合试点工程基础研究类培新项目(2023PX036)。
关键词
搅拌反应釜
CFD方法
四层浆叶装置
气液两相
流场特性
stirred reaction kettle
CFD method
four-impeller device
gas-liquid two phases
flow field characteristics
