摘要
利用计算流体动力学(CFD)方法计算了四叶片倾斜涡轮结晶器内流体混合过程的流动场和浓度场,考察了搅拌桨在不同位置对搅拌混合流场及混合时间的影响,并结合电导率实验对模拟结果进行了验证。结果表明:当搅拌桨离底高度为液体高度的1/3时,结晶器内流场分布比较均匀,混合时间较短,适合工业上底部进料的结晶器。
The flow and concentration fields of mixing process in the crystallizer with a four-pitched-blade turbine were simulated by computational fluid dynamics(CFD),the effects of the impeller location on flow field and mixing time in the crystallizer were investigated,and the simulated results were verified through the conductivity experiments.The results showed that the distribution of the flow field in the crystallizer was uniform and the mixing time was short when the distance from the impeller to the bottom of the crystallizer was 1/3 height of the liquid in the crystallizer,which was quite suitable to the industrial bottom-feed crystallizer.
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
2009年第6期508-512,共5页
Chemical Reaction Engineering and Technology
基金
国家科技支撑计划项目(2007BAI46B04)
关键词
结晶器
搅拌桨
计算流体力学
混合时间
crystallizer
impeller
computational fluid dynamics
mixing time
