不同油气参数下SVQS系统内颗粒浓度场的模拟  

Numerical simulation of particle concentration field in a super vortex quick separation system under different oil steam parameters

作　　者：张智亮[1,2,3] 陈海军 陈涛 牟沛 李安军 李文军 Zhiliang ZHANG;Haijun CHEN;Tao CHEN;Pei MOU;Anjun LI;Wenjun LI(School of Mechanical Engineering,Southwest Petroleum University,Chengdu,Sichuan 610500,China;Engineering Technology Research Institute of CNPCWestern Drilling Engineering Co.,Ltd.,Urumqi,Xinjiang 830011,China;Sichuan Zhongliyuan Construction Engineering Co.,Ltd.,Chengdu,Sichuan 610044,China;Sichuan Gem Machinery Drilling and Mining Equipment Co.,Ltd.,Guanghan,Sichuan 618300,China;China National Pipeline Network GroupWestern Pipeline Co.,Ltd.,Urumqi,Xinjiang 831400,China;Urumqi Petrochemical Company of China Petroleum,Urumqi,Xinjiang 831400,China)

机构地区：[1]西南石油大学机电工程学院,四川成都610500 [2]中国石油集团西部钻探工程有限公司工程技术研究院,新疆乌鲁木齐830011 [3]四川中利源建设工程有限公司,四川成都610044 [4]四川宝石机械钻采设备有限责任公司,四川广汉618300 [5]国家管网集团西部管道有限责任公司,新疆乌鲁木齐831400 [6]中国石油乌鲁木齐石化分公司,新疆乌鲁木齐831400

出　　处：《过程工程学报》2022年第1期50-61,共12页The Chinese Journal of Process Engineering

基　　金：国家重点基础研究发展计划(编号:2012CB215004);国家科技重大专项课题(编号:2011ZX05021-001);中国博士后科学基金(编号:2019M663865)。

摘　　要：为研究提升管出口旋流快分(SVQS)系统中催化剂颗粒的运动规律与浓度分布特征,对不同油气参数下SVQS系统的气固分离进行了数值流动模拟,从粒径、浓度分布和颗粒返混三个方面进行了分析。结果表明,在入口浓度一定的情况下,油气密度越大或黏度越小,封闭罩壁面处颗粒浓度越大,呈螺旋状分布的细带带宽和螺距不同;在隔流筒盖板处有颗粒大量聚集,并形成具有周期脱落特点的颗粒环带;隔流筒底部出现的“短路流”现象,削弱了SVQS系统的分离性能;不同粒径的颗粒下行时始终处于螺旋分层排列状态,且SVQS系统对直径为0.013 mm以下的细小颗粒的分离性能较弱。油气密度越大或黏度越小,颗粒间的跟随性更佳,浓度分布更均匀,SVQS系统对中、细颗粒的捕捉能力变强。SVQS系统中存在颗粒返混现象,且随油气密度增大或黏度减小而削弱。削弱颗粒返混、抑制颗粒高峰是提高该系统分离性能的重要方式。In order to investigate the movement and concentration distribution characteristics of catalyst particles in the riser outlet super vortex quick separation(SVQS)system,the gas-solid two-phase flow under different oil steam parameters was numerically simulated.Whereafter,particle size,concentration distribution and particles back mixing were analyzed.The simulation result showed that under a certain entrance concentration the particle concentration on the wall of the closing cylinder was greater with the greater density of oil steam or the smaller viscosity of oil steam,and distributed in a spiral strip with different bandwidth.A large number of particles gathered at the cover plate of the flow partition cylinder and formed a particle belt with periodic shedding characteristics.Moreover,the phenomenon of short circuit flow at the bottom of flow partition cylinder that weakened the separation performance of SVQS system.Particles with different sizes were always in a spiral layered arrangement when moving in a downspin,and the separation performance of SVQS system for fine particles with diameter below 0.013 mm was weak.With the increase of oil steam density or the decrease of viscosity,the particles following behavior became better,the particles concentration distribution was more uniform,and the SVQS system had a stronger ability to capture medium and fine particles.Particles back mixing also existed in SVQS system and decreased with the increase of oil steam density or the decrease of viscosity.Meanwhile,reducing particle back mixing and inhibiting particle concentration peak were important ways to improve the separation performance of the system.

关 键 词：提升管 数值模拟 油气密度 黏度 颗粒 浓度分布 

分 类 号：TE96[石油与天然气工程—石油机械设备]