原料天然气初级旋流净化数值模拟研究  

NUMERICAL SIMULATION OF PRIMARY CYCLONE PURIFICATION OF FEED NATURAL GAS

作　　者：李煌[1] 任海波 闫渊 魏利平[3] Li Huang;Ren Haibo;Yan Yuan;Wei Liping(SINOPEC Dazhou Natural Gas Purification Co.,Ltd.,Dazhou,Sichuan,636156;Shaanxi Provincial Natural Gas Co.,LTD.,Xi'an,Shaanxi,710016;School of Chemical Engineering,Northwest University,Xi'an,Shaanxi,710069)

机构地区：[1]中国石化达州天然气净化有限公司天然气净化厂,四川达州636156 [2]陕西省天然气股份有限公司,陕西西安710016 [3]西北大学化工学院,陕西西安710069

出　　处：《石油化工设备技术》2022年第4期15-20,31,I0001,I0002,共9页Petrochemical Equipment Technology

基　　金：国家自然科学基金(51606153);中石化《高含硫气田平台期开发生产安全保障技术及工业化应用》(319022-12)子项目《高含硫天然气集输与净化装置腐蚀风险防控及安全运行关键技术研究》。

摘　　要：旋流管是高含硫天然气净化旋风分离器的分离单元,是实现高效气固分离的关键内构件。基于CFD-DPM方法对旋流管的结构参数进行了优化设计。首先将其关键结构参数归结为7个设计变量,建立优化物理模型,采用均匀设计法在可选范围内设置结构参数及多种型号,进而通过数值模拟获得流场分布、颗粒分离轨迹、压降及分离效率等流动信息。文章提出了一个无量纲参数Y作为综合考虑分离效率和压降影响的优化目标参数,利用该参数可有效获得在压降允许范围内最高分离效率对应的分离器型号及结构参数。此外,文章还进一步详细分析了最优结构的流场、分离轨迹等细节流动信息,可为初级旋流管优化设计提供重要参考。Swirl tube is the separation unit of cyclone separator for purification of high-sulfur natural gas,which is the key internal component to achieve efficient gas-solid separation.Based on CFD-DPM method,the structural parameters of cyclone tube are optimized.Firstly,the key structural parameters are characterized to seven design variables,and the optimized physical model is established.The structural parameters and various models are set within the optional range by means of uniform design method,and the flow field distribution,particle separation trajectory,pressure drop,separation efficiency and other flow information are obtained by numerical simulation.In this paper,nondimensionless parameter Y is proposed as the optimization objective parameter,which takes into account the influence of separation efficiency and pressure drop comprehensively,and can effectively help to obtain the model and structural parameters with the highest separation efficiency within the allowable range of pressure drop.The detailed flow information of the optimal structure,such as flow field and separation trajectory,is analyzed in detail,which can provide important reference for the optimization design of the primary swirl tube.

关 键 词：原料天然气 净化 旋风分离器 旋流管 CFD-DPM 压降 分离效率 无量纲参数 

分 类 号：TE644[石油与天然气工程—油气加工工程]