催化裂化沉降器内料腿-翼阀排料区域的气相流场的数值模拟  

NUMERICAL SIMULATION OF GAS FLOW FIELD AROUND DIPLEG-TRICKLE VALVE IN FCC DISENGAGER

作　　者：李晓曼[1] 严超宇[1] 孙国刚[1] 魏耀东[1] 

机构地区：[1]中国石油大学(北京)重质油国家重点实验室,北京102249

出　　处：《石油炼制与化工》2015年第6期74-78,共5页Petroleum Processing and Petrochemicals

基　　金：国家自然科学基金资助项目(21176250);中国石油大学(北京)基本科研基金资助项目(KYJJ2012-03-13)

摘　　要：采用计算流体力学软件Fluent6.2对催化裂化装置沉降器内旋风分离器下部的料腿-翼阀排料区域周围的气相流场进行了数值模拟,主要分析翼阀阀板表面产生磨损的原因。计算结果表明,沉降器内油气在料腿负压差的作用下会通过开启阀板与阀口的间隙反窜进入料腿形成漏风,漏风量随着阀板开度和负压差的增大而增大。这种漏风携带催化剂颗粒冲击阀板是导致冲蚀磨损的主要原因,同时影响到旋风分离器的分离效率。The numerical simulation of the gas flow field around the trickle valve of cyclone in FCC disengager was conducted by CFD software Fluent6.2, and the erosion cause of trickle valve plate sur- face was analyzed. The calculation results indicate that the oil gas is entrained into the dipleg through the clearance between the valve plate and the valve port due to the negative pressure of the dipleg. The amount of oil gas increases with increasing the valve plate opening and the negative pressure. The oil gas carries catalyst particles to impact on the valve plate,which is the main reason of the erosion. The up- flow of oil gas through the dipleg also reduces the separation efficiency of the cyclone separator.

关 键 词：沉降器 翼阀 磨损 流场 数值模拟 

分 类 号：TE966[石油与天然气工程—石油机械设备]