新型管式搅拌反应器的气液传质特性
Gas-liquid mass transfer characteristics of a new tubular stirred reactor
李天赐 1赵秋月 1朱帅 1郑明昭 1张廷安2
作者信息
- 1. 东北大学冶金学院,辽宁 沈阳 110819;多金属共生矿生态化冶金教育部重点实验室,辽宁 沈阳 110819
- 2. 东北大学冶金学院,辽宁 沈阳 110819;多金属共生矿生态化冶金教育部重点实验室,辽宁 沈阳 110819;中铝东南材料院(福建)科技有限公司,福建 福州 350015
- 折叠
摘要
多相体系的混合与传质性能直接影响多相反应过程,团队开发了从搅拌桨叶端出气的新型管式搅拌反应器.采用稳态亚硫酸盐法(FSM)研究反应器的气液传质性能,考察了通气流量Q、搅拌弗劳德数Fr和液含量ε对体积传质系数kLa的影响.结果表明:增大Q和Fr可以有效提高kLa;新型搅拌桨从桨叶端进气方式可以增强kLa,相较传统反应器最大增强约2 倍.反应器的气液传质性能在ε = 0.5、Fr =0.054、Q =1.6 m3·h-1时最高,此时kLa =0.032 4 s-1.依据试验数据建立了关于kLa的无量纲关联式,误差基本在25%以内,对后续反应器的改进和应用具有参考意义.
Abstract
The mixing and mass transfer performance of the multiphase system directly affects the multiphase reaction process.The team developed a new type of tubular stirred reactor that discharges gas from the impeller end.The steady-state sulfite method(FSM)was used to study the gas-liquid mass transfer performance of the reactor.The effects of ventilation flow rate Q,stirring Froude number Fr and liquid content on the volumetric mass transfer coefficient kLa were investigated.The results show that increasing Q and Fr can effectively improve kLa.The new inlet mode can enhance kLa,which is about 2 times higher than that of the traditional reactor.The gas-liquid mass transfer performance of the reactor is highest at ε =0.5,Fr =0.054,Q =1.6 m3·h-1,with kLa = 0.032 4 s-1.Based on the experimental data,a dimensionless correlation for kLa was established,and the error was basically within 25%,which has reference significance for improvement and application of the subsequent reactor.
关键词
多相反应器/曝气/弗劳德数/气液系统/气液传质/冶金设备Key words
multiphase reactor/aeration/Froude number/gas-liquid system/gas-liquid mass transfer/metallurgical equipment引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据