新型天然气过滤分离器内部流场模拟研究
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摘要
为了研究过滤分离器结构及内部流场对过滤分离性能的影响,提出了一种新型天然气过滤分离器结构。采用流体动力学软件FLUENT,通过设置合理的物理模型、网格类型、守恒方程、湍流模型、初始及边界条件,建立分离器过渡段、分离器内部流场模拟的数值模型,基于数值模拟结果分析了分离器过渡段和分离器内部的流场特性。结果表明,过滤分离器管束过渡段的设置对进入分离器的气体起到了很好的粗滤和再分配作用;每根滤芯的天然气流量较为均匀,但对气体的过滤不均匀,越靠近分离器过渡段,通过的气体流量越大;滤芯的有效过滤面积远小于滤芯的实际过滤面积。因实际使用滤芯数量远大于工艺计算数量,在过滤分离器设计时应适当考虑设计裕量,以达到过滤分离器滤芯寿命的要求。
In order to study the effect of the filter separator structure and inner flow field on filter separation performance,a new type of filter separator structure for natural gas is designed. By using the fluid dynamics software FLUENT and setting proper physical models, network types, conservation equations,turbulent models,the initial and boundary conditions,the numerical models of transition section and the inner flow field of the filter separator are built. The flow field characteristics of separator transition section and inner part are analyzed based on the numerical simulation results. The results indicate that the setting of the tube bundle transition section of the filter separator has a significant collating and re-distributing effect on the gas entering the separator. The flow rate of each filter element is even,but their filter performance is not even. Filter elements closing to transition section understand larger flow rate,and the effective filtration area is less than the actual filter area of the filter elements. Because the actual amount of filter elements is far more than the value calculated by the process equation, the design allowance should be considered properly when filter separators are designed, so as to satisfy the requirements of filter element service life.
In order to study the effect of the filter separator structure and inner flow field on filter separation performance,a new type of filter separator structure for natural gas is designed. By using the fluid dynamics software FLUENT and setting proper physical models, network types, conservation equations,turbulent models,the initial and boundary conditions,the numerical models of transition section and the inner flow field of the filter separator are built. The flow field characteristics of separator transition section and inner part are analyzed based on the numerical simulation results. The results indicate that the setting of the tube bundle transition section of the filter separator has a significant collating and re-distributing effect on the gas entering the separator. The flow rate of each filter element is even,but their filter performance is not even. Filter elements closing to transition section understand larger flow rate,and the effective filtration area is less than the actual filter area of the filter elements. Because the actual amount of filter elements is far more than the value calculated by the process equation, the design allowance should be considered properly when filter separators are designed, so as to satisfy the requirements of filter element service life.
引文
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[18]金俊卿,郑云萍.FLUENT软件在油气储运工程领域的应用[J].天然气与石油,2013,31(2):27-30.JIN Junqing,ZHENG Yunping.Application of FLUENTsoftware in oil and gas storage and transportation engineering design[J].Natural Gas and Oil,2013,31(2):27-30.
[19]谢绪扬.组合式三相分离器内气液分离元件的开发研究[D].东营:中国石油大学(华东).2015.XIE Xuyang.Development and research of gas-liquid separation elements in combined three-phase separator[D].Dongying:China University of Petroleum(East China).2015.
[20]袁惠新,方毅,付双成.天然气脱蜡旋风分离器分离效率的模拟[J].化工进展,2014,33(1):43-49.YUAN Huixin,FANG Yi,FU Shuangcheng.Numerical simulation of the separation efficiency of natural gas dewaxing cyclone separator[J].Chemical Industry and Engineering Progress,2014,33(1):43-49.
[21]刘兴伟,黄玲艳,鲍玲玲,等.旋流器位置对超音速分离管内部流场影响的研究[J].工程热物理学报,2014,35(9):1817-1820.LIU Xingwei,HUANG Lingyan,BAO Lingling,et al.Investigation of flow characteristic inside the supersonic separator with different swirler position[J].Journal of Engineering Thermophysics,2014,35(9):1817-1820.
[2]曹文全,韩晓兰,刘钊,等.旋流分离技术在高含硫天然气净化厂的应用[J].天然气与石油,2017,35(2):47-52.CAO Wenquan,HAN Xiaolan,LIU Zhao,et al.Application of cyclone separation technology in natural gas purification plant with high sulfur content[J].Natural Gas and Oil,2017,35(2):47-52.
[3]王保群,林燕红,焦中良.我国天然气管道现状与发展方向[J].国际石油经济,2013,21(8):76-79.WANG Baoqun,LIN Yanhong,JIAO Zhongliang.Status and development direction of china's natural gas piplines[J].International Petroleum Economics,2013,21(8):76-79.
[4]张剑波,翁军利,宋丽丽,等.不同类型溶液过滤器在天然气净化装置中的应用[J].天然气工业,2006,26(9):147-149.ZHANG Jianbo,WENG Junli,SONG Lili,et al.Application of different solution filters in natural gas purification units[J].Natural Gas Industry,2006,26(9):147-149.
[5]杨福武.高含硫天然气过滤单元提升优化研究[J].低碳世界,2017(3):100-101.YANG Fuwu.Study on lifting optimization of natural gas filtration unit with high sulphur content[J].Low Carbon World,2017(3):100-101.
[6]刘震,姬忠礼,吴小林,等.高含硫天然气过滤单元性能优化[J].天然气工业,2016,36(3):87-92.LIU Zheng,JI Zhongli,WU Xiaolin,et al.Performance improvement of a high-sulfur natural gas filtration unit[J].Natural Gas Industry,2016,36(3):87-92.
[7]肖连,古自强,常程,等.天然气净化用过滤元件性能测定与分析[J].石油机械,2015,43(12):81-85.XIAO Lian,GU Ziqiang,CHANG Cheng,et al.Performance test of filter cartridge for natural gas purification[J].China Petroleum Machinery,2015,43(12):81-85.
[8]李春亮,张丽凤,曹国军,等.天然气净化脱硫装置过滤器的应用与优化[J].石化技术,2017,24(3):267.LI Chunliang,ZHANG Lifeng,CAO Guojun,et al.Application and optimization of filter in natural gas purification and desulfurization unit[J].Petrochemical Industry Technology,2017,24(3):267.
[9]邵春明.天然气压缩机干气密封滤芯性能测定与分析[J].石油机械,2017,45(4):102-106.SHAO Chunming.Measurement and analysis on the performance of dry-gas-seal filter cartridge of natural gas compressor[J].China Petroleum Machinery,2017,45(4):102-106.
[10]姬忠礼.天然气输送用过滤分离设备性能测定与分析[J].中国石油大学学报(自然科学版),2013,37(5):145-150.JI Zhongli.Performance measurement and analysis of filtration and separation equipment for natural gas transportation[J].Journal of China University of Petroleum,2013,37(5):145-150.
[11]何策,刘幕双,张海龙.复合金属滤材过滤性能试验研究[J].石油机械,2006,34(6):1-3.HE Ce,LIU Mushuang,ZHANG Hailong.Test on filtration performance of composite-metal filtration materials[J].China Petroleum Machinery,2006,34(6):1-3.
[12]宋双和,周欣.圆筒折叠式滤芯在高清洁度液压油生产中的应用[J].合成润滑材料.2013,40(2):19-21.SONG Shuanghe,ZHOU Xin.Application of cylindrical folded filter on production of high cleanliness hydraulic oils[J].Synthetic Lubricant,2013,40(2):19-21.
[13]张昱威,李方俊.天然气滤芯性能试验方法的探讨[J].当代化工,2016,45(12):2856-2858.ZHANG Yuwei,LI Fangjun.Discussion on test method for performance of natural gas filter[J].Contemporary Chemical Industry,2016,45(12):2856-2858.
[14]李熹,郭益,米力田.新型过滤器结构分析及改进[J].天然气与石油,2005,23(1):1-6.LI Xi,GUO Yi,MI Litian.Analysis and improvement of new-style filter structure[J].Natural Gas and Oil,2005,23(1):1-6.
[15]邓国强,董守平.气液两相水平管流流态可视化分析[J].石油机械,1999,27(12):21-23.DENG Guoqiang,DONG Shouping.Visualization analysis of gas-liquid two-phase horizontal pipe flow[J].China Petroleum Machinery,1999,27(12):21-23.
[16]刘志刚,赵耀华.微管内流场的可视化实验研究[J].中国科学(E辑:工程科学材料科学),2005,35(7):717-724.LIU Zhigang,ZHAO Yaohua.Visualization of flow field in microtubes[J].Science in China(Serial E:Engineering&Materials Science),2005,35(7):717-724.
[17]贾晓林,陈宇波,李珣,等.天然气管道内流场测试系统配套关键技术研究[J].工业计量,2015,25(增刊2):5-9.JIA Xiaolin,CHEN Yubo,LI Xun,et al.Research on key technologies of Internal flow field testing system for natural gas pipeline[J].Industrial Metrology,2015,25(S2):5-9.
[18]金俊卿,郑云萍.FLUENT软件在油气储运工程领域的应用[J].天然气与石油,2013,31(2):27-30.JIN Junqing,ZHENG Yunping.Application of FLUENTsoftware in oil and gas storage and transportation engineering design[J].Natural Gas and Oil,2013,31(2):27-30.
[19]谢绪扬.组合式三相分离器内气液分离元件的开发研究[D].东营:中国石油大学(华东).2015.XIE Xuyang.Development and research of gas-liquid separation elements in combined three-phase separator[D].Dongying:China University of Petroleum(East China).2015.
[20]袁惠新,方毅,付双成.天然气脱蜡旋风分离器分离效率的模拟[J].化工进展,2014,33(1):43-49.YUAN Huixin,FANG Yi,FU Shuangcheng.Numerical simulation of the separation efficiency of natural gas dewaxing cyclone separator[J].Chemical Industry and Engineering Progress,2014,33(1):43-49.
[21]刘兴伟,黄玲艳,鲍玲玲,等.旋流器位置对超音速分离管内部流场影响的研究[J].工程热物理学报,2014,35(9):1817-1820.LIU Xingwei,HUANG Lingyan,BAO Lingling,et al.Investigation of flow characteristic inside the supersonic separator with different swirler position[J].Journal of Engineering Thermophysics,2014,35(9):1817-1820.