摘要
利用计算流体动力学方法对组合式搅拌器作用下聚合釜内固-液两相流的流场进行数值模拟。分析了不同固相颗粒粒径对液相速度分布、固相颗粒体积分数分布及搅拌功率的影响。数值模拟结果表明,颗粒粒径的变化对液相速度的影响较小,对釜内固相颗粒分布影响较大;颗粒粒径越大,聚合釜釜底固相颗粒沉积越明显,但颗粒体积分数增大会导致聚合釜釜内固相颗粒的分散更为均匀,颗粒粒径的改变对搅拌功率的影响不显著。研究结果可为聚合釜内固-液两相流的工程应用提供理论依据。
Computational fluid dynamics method was used to simulate the flow field of the solid-liquid two-phase in a polymerizer under the action of a combined stirrer. The influence to liquid velocity distribution and solid content distribution were analyzed and the influence of stirring power on solid particle diameter was studied. The simulation results show that the change of particle diameter has little effect on the liquid velocity with a great influence on the solid particle distribution. The bigger particle diameter, the effect of solid-liquid deposition is more obvious. The bigger particle concentration will result in more uniform dispersion of the solid particle in polymerization reactor. The result will be provided a theoretical basis for engineering applications of solid-liquid two-phase flow in stirred tanks.
作者
崔锋
董金善
曹宇
CUI Feng;DONG Jin-shan;CAO Yu(School of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211816, China)
出处
《石油化工设备》
CAS
2019年第3期18-23,共6页
Petro-Chemical Equipment
关键词
聚合釜
固-液两相流
组合式搅拌器
颗粒
粒径
影响
polymerization reactor
solid-liquid two-phase flow
combined agitator
particle
diameter
effect
