摘要
对催化裂化提升管反应器内气体流经颗粒聚团的流体力学特性进行了数值模拟研究。研究结果表明,气体流经颗粒聚团时,由于聚团的阻力作用,进入聚团的气体流量较少,大部分气体从聚团两侧绕流过去,聚团内部不同位置的颗粒所受到的力不同。颗粒聚团性质对气体流经时的流体力学特性影响很大,聚团空隙率越大,穿过聚团的气体流量越大,聚团内颗粒所受到的力也越大;聚团尺寸越大,聚团内颗粒所受到的力越小。气体速度对其流经颗粒聚团时的流体力学特性影响不大。
The flow behavior of gas going through particle clusters in FCC risers was simulated. The results showed that the flux of gas getting into the cluster was much less than that flowing around the cluster due to the resistance of cluster. The force acting on each particle of cluster was different from each other. The characteristics of clusters had great effects on the flow behavior of gas going through clusters. It was found that the flux of gas getting into a cluster and the total force acting on particles increased with the increase of cluster porosity; while they decreased with increasing the size of cluster. The gas velocity had a minor impact on the flow behavior of gas going through clusters.
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
2014年第1期41-47,共7页
Chemical Reaction Engineering and Technology
基金
国家重点基础研究发展计划(973计划)(2012CB215000)
国家自然科学基金(91334104)
关键词
气固流动
提升管
颗粒聚团
流动特性
气固作用力
gas-solid flow
riser
particle cluster
flow behavior
gas-solid drag force
