二级旋流气液分离装置设计与流场特性模拟

doi:10.12034/j.issn.1009-606X.218124

过程工程学报 ›› 2018, Vol. 18 ›› Issue (6): 1198-1209.DOI: 10.12034/j.issn.1009-606X.218124

二级旋流气液分离装置设计与流场特性模拟

杨兆铭¹，陈建磊³，韩云蕊¹，何利民^1,2*，罗小明^1,2

1. 中国石油大学(华东)储运与建筑工程学院，山东青岛 266580 2. 中国石油大学(华东)山东省油气储运安全省级重点实验室，山东青岛 266580 3. 中石化石油工程设计有限公司，山东东营 257000

收稿日期:2018-01-22 修回日期:2018-03-19 出版日期:2018-12-22 发布日期:2018-12-19
通讯作者: 何利民 upcmpfs@163.com
基金资助:
国家科技重大专项课题子课题-深水天然气凝析液控砂与射流清管技术

Design of two-stage swirling gas?liquid separator and simulation of flow field characteristics

Zhaoming YANG¹, Jianlei CHEN³, Yunrui HAN¹, Limin HE^1,2*, Xiaoming LUO^1,2

1. College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao, Shandong 266580, China 2. China University of Petroleum?Shandong Provincial Key Laboratory of Oil and Gas Storage and Transportation Security, Qingdao, Shandong 266580, China 3. SINOPEC Petroleum Engineering Corporation, Dongying, Shandon

Received:2018-01-22 Revised:2018-03-19 Online:2018-12-22 Published:2018-12-19
Contact: Li-min He upcmpfs@163.com

摘要/Abstract

摘要： 通过有效体积转化进行分离器尺寸设计，针对高气液比工况设计了一种二级旋流气液分离装置，基于液滴在旋流场中的破碎特性及Navier?Stocks方程的简化求解建立一种分离器直径的校核方法，通过实验验证了该校核方法有效. 通过CFD方法对简化的分离装置内部流场的非对称性进行分析. 结果表明，旋转流场的不稳定程度随入口面积和升气管直径减小而减小，入口速度不影响流场的不稳定程度，不同的长宽比在相同的入口面积下对内部流场的非轴对称性无显著影响，但单独增加入口的长、宽或二者同时增加使入口面积增大，将使分离器筒体横截面与入口截面的面积比KA减小，增加内部流场的非轴对称性.

关键词: 高气液比, 旋流分离, 校核方法, 数值模拟, 非对称性

Abstract: The undersea separation was widely used in the petroleum industry to improve the efficiency and keep the well pressure. High gas?liquid ratio condition exists in offshore gas field frequently and for this condition, a novel two-stage gas and liquid cylindrical cyclone was designed. In order to increase the separation efficiency, some parts had been added in the separator. The size parameters of the separator were designed by using effective volume transformation methods, and a method for diameter determination was also proposed based on the characteristics of liquid drop breaking in swirl field. This determination described the liquid drop’s changing shape and breaking in the gas cyclone field and the critical relative velocity of the gas phase and liquid phase when the liquid drops started to break had also been calculated. The model based on the pressure field by the solution of Navier?Stocks equation and had also been verified by the experiments which had measured the liquid drops diameters by using Malvern laser particle size analyzer and the data from model and experiments kept high consistency. Different turbulence models, different meshing schemes and different discrete formats had been compared in order to choose the best numerical simulation plan and this plan also had been validated by existing experimental data. The characteristics of asymmetry were analyzed by CFD about the internal flow field of the simplified model and the influence of structural parameters and operational parameters were also obtained. The results of the models showed that it was very diffcult for oil drops in different diameters to break in the gas cyclone fields. The results of the numerical simulation showed that the length of the separator had little effect on the asymmetry characteristics of the internal flow field and the inlet velocity and the ratio of the length and width of inlet would not make the internal flow field become unstable.

Key words: high gas-liquid ratio, cyclone separation, determination method, numerical simulation, asymmetry

杨兆铭陈建磊韩云蕊何利民罗小明. 二级旋流气液分离装置设计与流场特性模拟[J]. 过程工程学报, 2018, 18(6): 1198-1209.

Zhaoming YANG Jianlei CHEN Yunrui HAN Limin HE Xiaoming LUO. Design of two-stage swirling gas?liquid separator and simulation of flow field characteristics[J]. Chin. J. Process Eng., 2018, 18(6): 1198-1209.

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二级旋流气液分离装置设计与流场特性模拟

Design of two-stage swirling gas?liquid separator and simulation of flow field characteristics

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