摘要
采用欧拉模型对超短接触旋流反应器内的气固两相流场进行了数值模拟,主要研究了分离腔内气固两相的分离过程。具体考察了导叶下部柱段与锥段分离空间以及排剂口附近固相体积分数的分布情况,评估气固两相在分离腔不同部位的分离效果,重点对比分析了固相粒径差异对流动情况以及颗粒聚集的影响规律。计算结果表明:5μm颗粒在分离腔的浓度分布规律不同于10μm和30μm颗粒,由于颗粒粒径较小易被气流携带,在分离空间以及排剂口都出现了不同程度的返混,对分离不利。
Gas-solid two-phase flow of the quick-contact cyclone reactor was simulated with the Eulerian model, especially about separation process in the separation space. The volume fraction of cylindrical and conic sections under the guide vane and the dust mouth was investigated specificly. The separation effect of gas-solid around separation space was evaluated, and the key point was on how the particle size differences impact on the flow and particles gathering pattern. The results showed that the concentration distribution pattern about particle size of 5μm was different from that 10μm and 30μm, the reason was that the small size particles followed gas more easily, it caused different degree of backmixing in both separation space and dust mouth, this phenomenon was bad for separation effect.
出处
《流体机械》
CSCD
北大核心
2012年第2期24-29,45,共7页
Fluid Machinery
基金
重质油国家重点实验室开放基金资助项目
中国石油科技创新基金(W1003003)
中国石油大学研究创新基金
