聚并破碎模型对T型管分离器流场特性及分离性能影响  

Impact of Coalescence and Breakage Models on Flow Field Characteristics and Separation Performance in T-junction

作　　者：李枫[1,2] 高金明 邢雷 刘彩玉[1] 关大亮 Li Feng;Gao Jinming;Xing Lei;Liu Caiyu;Guan Daliang(School of Mechanical Science and Engineering,Northeast Petroleum University,Daqing 163318,China;Heilongjiang Key Laboratory of Petroleum and Petrochemical Multiphase Treatment and Pollution Prevention,Daqing 163318,China;Zhejiang TUNA Environmental Science&Technology Co.,Ltd.,Shaoxing 312000,China)

机构地区：[1]东北石油大学机械科学与工程学院,黑龙江大庆163318 [2]黑龙江省石油石化多相介质处理及污染防治重点实验室,黑龙江大庆163318 [3]浙江德创环保科技股份有限公司,浙江绍兴312000

出　　处：《流体机械》2020年第11期17-24,共8页Fluid Machinery

基　　金：国家863计划课题项目(2012AA061303);大庆市指导性科技计划项目(ZD-2019-19)。

摘　　要：目前对T型管的报道多集中于分离性能研究及流场特性分析,而关于T型管内油滴聚并与破碎模型的选型研究尚未见报道。为了确定出适用于模拟T型管内油滴粒度分布特性的聚并破碎模型,以双支管T型管为研究对象,采用Euler-Euler多相流模型与群体平衡模型(Population Balance Model,PBM)耦合方法,采用多种不同聚并破碎组合模型对T型管内流场进行数值模拟分析,研究不同模型组合方案时T型管内的浓度场分布、油滴聚并破碎特性及分离性能,并开展室内试验研究,对不同模型组合方案的准确性进行筛选。研究表明:turbulent-luo模型组合方案所得T型管出口处的油滴粒度分布在300~600μm范围内,室内试验获得相同参数下出口处油滴粒度分布在200~600μm,呈现出了较好的一致性。同时turbulent-luo模型组合方案模拟的分流比在20%~60%范围内,处理量在2~4 m3/h范围内时T型管分离效率与试验效率变化规律相同,分离效率都随分流比增大而先增大后减小,在分流比为50%时达到了效率最大值。模拟与试验结果显示随处理量的增大T型管分离性能逐渐降低,且模拟值与试验值吻合良好。Currently,most studies on T-junction are focused on study of separation performance and analysis of flow field characteristics,while studies on the type selection of oil droplet coalescence and breakage models in T-junction have not been reported.In order to identify the coalescence and breakage models suitable for simulation of the droplet size distribution characteristics of T-junction,the method of coupling Euler-Euler model with population balance model(PBM)and combination of various different coalescence and breakage models were used to numerically simulate analyze the flow field in the T-junction,study the concentration field distribution and oil droplets breakage-coalescence and separation characteristics in the T-junction,and experimental studies were conducted to select exact combination scheme in laboratory.The studies indicate that the diameter of oil droplets at the outlet of T-junction by the turbulent-luo model combination scheme was distributed within 300~600μm,and the diameter of oil droplets at the outlet of T-junction was distributed within 200~600μm under the same parameters obtained by laboratory experiment,showing a good consistency.Meanwhile,when the processing capacity is within 2~4 m3/h and split ratio within 20%~60%in the turbulentluo model combination scheme simulation,the separation efficiency has same change law with experiment efficiency.The separation efficiency increases with the increase of flow ratio at first and then decreases,and reaches the maximum efficiency when the flow ratio is 50%.The simulation and experimental results show that the separation efficiency of T-junction gradually reduces with the increase of processing capacity,and the simulation values are in good agreement with experimental data.

关 键 词：T型管 数值模拟 流场特性 油滴粒度 分离性能 

分 类 号：TH138[机械工程—机械制造及自动化] TQ028.4[化学工程]