化工学报2025，Vol.76Issue(2)：564-575,12.DOI:10.11949/0438-1157.20241048
气液搅拌釜多层桨叶相互作用及组合优化
Interaction of multiple impellers for gas-liquid stirred tank and optimization of their combinations
摘要
Abstract
The impeller is one of the most important components of gas-liquid stirred tank,and its structure and combination significantly affect the gas-liquid dispersion and mass transfer performance.Combining the cold mold experiment and CFD-PBM numerical simulation,the interaction relationship between the multi-layer blades of the gas-liquid stirring tank and the optimal blade combination form were obtained.The research results indicate that the radial impeller,as the bottom impeller,has the greatest impact on gas dispersion and bubble breakage,the middle axial flow impeller has a relatively small effect on the shear stress of the bottom impeller,while the axial convergence generated by the top axial flow impeller would weaken the shear stress of the middle impeller.The arrangement and combination of multiple impellers can affect the power consumption of each impeller,with the top impeller having the most significant impact on the power of the middle impeller.HEDT,as the bottom impeller,has low power consumption and good gas dispersion effect.KYA,as the middle impeller,can enhance axial convergence,reduce local eddies,and further crush bubbles.PBT,as the top impeller,has low power consumption and control large circulation flow structures.The HEDT+KYA+PBT impeller combination balance power consumption,gas phase dispersion,and gas-liquid mass transfer,and has the highest unit power consumption gas holdup and average volumetric mass transfer coefficient,making it the optimal impeller combination.These research results can provide some theoretical guidance for the design and optimization of multiple impellers in gas-liquid stirred tanks.关键词
气液搅拌釜/计算流体力学/多层桨叶/气液传质/优化Key words
gas-liquid stirred tank/computational fluid dynamics/multiple impellers/mass transfer between gas and liquid/optimization分类
化学化工引用本文复制引用
谢楠楠,陈和,叶光华,束忠明,傅送保,周兴贵..气液搅拌釜多层桨叶相互作用及组合优化[J].化工学报,2025,76(2):564-575,12.基金项目
国家自然科学基金项目(22378115) （22378115）
中海油集团公司科技项目(KJZH-2022-0026) （KJZH-2022-0026）
