催化裂化沉降器新型高效旋流快分器的结构优化与分析  

Configuration optimization and analysis of newly developed vortex quick separator for FCC disengager

作　　者：孙凤侠[1] 卢春喜[1] 时铭显[1] 

机构地区：[1]中国石油大学化学科学与工程学院

出　　处：《中国石油大学学报（自然科学版）》2007年第5期109-113,共5页Journal of China University of Petroleum(Edition of Natural Science)

摘　　要：在CFX软件平台上,采用RSM模型对两种结构的新型旋流快分器内流场进行了三维数值模拟,考察了该旋流快分器的内插筒状物的结构参数对旋流快分器内流场的影响规律。采用随机轨道模型对该快分器内颗粒的运动情况进行了计算,估算了该旋流快分器的分级效率和总分离效率。结果表明,该新型旋流快分器的压降随内插筒状物直径的增大而减小,随内插筒状物长度的增大变化很小;小于8μm的颗粒的分级效率随内插筒状物直径的增大而减小,小于3μm的颗粒的分级效率随内插筒状物长度的减小而减小;总分离效率随内插筒状物直径的增大先增大后减小,随其长度的增大而增大。II型结构的性能优于I型结构的性能。由此可获得在处理不同粒径粉料时,最佳的内插筒状物结构参数与型式,供工程设计参考。The influence of the inner cylinder configuration on the flow field in the newly developed vortex quick separation system for FCC disengager was studied. Three-dimensional flow field in the newly developed vortex quick separator was simulated based on the Reynolds stress model（ RSM）provided by CFX software. The trajectory of the particles was computed by introducing the discrete random walk tracking model, through which the grade efficiency and the general efficiency of the separator can be simulated. Numerical calculation results show that the pressure drop of the new vortex quick separator decreases with the diameter of the inner cylinder （ De ） increasing and changes a little with the length of the inner cylinder （ He ） increasing. The grade efficiency of the particle with diameter being less than 8 μm decreases with De increasing, and the grade efficiency of the particle with diameter being less than 3 μm decreases with He decreasing. The general separation efficiency increases firstly and then decreases with De increasing, and increases with He increasing. The performance of type Ⅱ is better than that of type Ⅰ. Thereby the optimal configuration of the inner cylinder is obtained When disposing of power is composed of different diameter particles, which can be used in engineering design.

关 键 词：旋流快分器 数值模拟 流场 分离效率 压降 

分 类 号：TQ050.2[化学工程]