催化裂化再生器树枝状气体分布器的气相流场CFD模拟

发布时间：2018-09-14 15:54

【摘要】：催化裂化装置再生器的气体分布器通常采用树枝状气体分布器,这种分布器存在着气体分布不均匀和喷嘴的冲蚀磨损问题。为此,对树枝状气体分布器区域进行计算流体力学(CFD)模拟,重点考察分布器内气相流场的特征。计算结果表明:树枝状气体分布器的各分支管内气体速度根据分支管的长度不同存在很大的变化,而且分支管沿程各喷嘴出口的气体流量也不同,导致喷嘴出口气流平均速度存在很大的不均匀性;此外,气体在分支管入口处以及近分支管入口端的喷嘴处存在偏流现象,压力分布不均匀,易产生催化剂倒吸现象,造成喷嘴的冲蚀磨损。
[Abstract]:Dendritic gas distributor is usually used in regenerator of FCC unit, which has the problems of uneven gas distribution and erosion wear of nozzle. For this reason, computational fluid dynamics (CFD) simulation is carried out in the dendritic gas distributor region, and the characteristics of the gas phase flow field in the distributor are investigated. The results show that the gas velocity in each branch of the dendritic gas distributor varies greatly according to the length of the branch tube, and the gas flow rate of the nozzle outlet along the branch tube is different. In addition, the gas flow at the inlet of the branch tube and the nozzle near the inlet end of the branch tube is biased, the pressure distribution is not uniform, and the phenomenon of catalyst suction is easy to occur. Causes erosion wear of nozzle.
【作者单位】：中国石油大学(北京)重质油国家重点实验室;
【基金】：国家自然科学基金资助项目(21176250) 中国石油大学(北京)科研基金资助项目(2462015YQ0301)
【分类号】：TE96

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