中文摘要：

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，气体在分支管人口处以及近分支管人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。

英文摘要：

A gas pipe distributor is widely used in regenerator of FCCU. However, there are problems of gas maldistribution and nozzle erosion in the pipe distributor. Therefore, the gas flow field in pipe distributor was simulated by using the CFD commercial software. The result shows that the gas velocity in each branch tube is different, depending on the length of the tube. The gas flow rate through each nozzle is also different which leads to a big inhomogeneity of gas distribution. In addition, there exists an obvious deflective flow at the inlet side of nozzle tube and a non-uniform of pressure distribution, which may cause low pressure drop of nozzle, leading to catalyst entrainment into banching pipe and erosion.