催化裂化沉降器新型高效旋流快分器内气固两相流动  

Numerical simulation of gas-particles flow field in new vortex quick separation system for FCC disengager

作　　者：孙凤侠[1] 卢春喜[2] 时铭显[2] 

机构地区：[1]中国石油化工股份有限公司上海石油化工研究院,上海201208 [2]中国石油大学(北京)化工学院,北京102249

出　　处：《化工学报》2005年第12期2280-2287,共8页CIESC Journal

基　　金：中国石化集团公司基础研究基金项目.

摘　　要：用CFX软件对催化裂化沉降器新型旋流快分器的气相流场进行了三维模拟,湍流模型采用雷诺应力输运方程模型.计算结果与用五孔探针测试的气相流场实验结果吻合很好.采用离散轨道模型对该旋流快分器内颗粒的运动情况进行了计算,并由此估算了旋流快分器的分级效率和总分离效率.模拟结果表明:该新型旋流头可消除现有旋流头喷出口附近的短路流,更有利于提高旋流快分器的效率.两种结构形式的旋流快分器分离效率的计算对比说明:在旋流头处加入一个内构件,是很有价值的改进.Three-dimensional gas flow field in the new vortex quick separation system with an inner component of FCC disengager was simulated based on the Reynolds stress model （RSM） provided by CFX. Predictions with the Reynolds stress model （RSM） were in reasonable agreement with experimental results measured by intelligent five-hole probe. The trajectory of the particles was computed by introducing the discrete random walk tracking model, through which the grading efficiency and general efficiency of the vortex quick separator could be simulated. Numerical calculation showed that the inner component could eliminate the short-circuit flow near the vortex head and help to improve the separation efficiency of the vortex quick separator. Comparison of the particle trajectory and separation efficiency between the generally used VQS system and this new system with an inner component showed the performance of the latter better than the former.

关 键 词：旋流快分器 数值模拟 流场 分离效率 

分 类 号：TQ051.8[化学工程]