晃动对规整填料吸收塔压降影响
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摘要
将内径为600 mm,填装有Mellapak350Y型金属孔板波纹填料的塔固定在可实现6个自由度晃动的平台上,分别进行静止和晃动在不同气速、喷淋密度下对填料层压降影响的试验研究。研究晃动时填料塔整体以及填料层流道内的压力分布规律,对Mellapak350Y型填料分别建立二维、三维的CFD模型,通过添加UDF程序实现模型晃动条件的引入。结果表明:晃动对填料层的整体压降无显著影响,但较大幅度摇摆或摇摆+摇摆耦合晃动在气速较大时会一定程度上增大压降;晃动会虚化静止时填料层压降在轴向上的带状分布状态,甚至呈现块状式或区域式分布。
An experimental study on the pressure drop in a column of inner diameter 600 mm,packed with Mellapak350 Y metal corrugated plate structured packing,is carried out.The column is fixed on a swaying platform,which can achieve six degrees of freedom swaying.We study the influence of the packing pressure drop in the stationary state and shaking state with different gas velocities and different spray densities.The 2D and 3D CFD models based on the Mellapak350 Y packing are established,to study the pressure distribution of the packing column and flow path of the packing under the conditions of shaking.In the modeling process,we add the UDF program to achieve the shaking condition of the model.The results show that the shaking has no significant effect on the overall pressure drop of the packing,but the larger pitching or pitching-rolling coupling sloshing will increase the pressure drop to a certain extent when the gas velocity is large.At the same time,the strip distribution of the pressure drop of the packing will be changed in the axial direction,and even demonstrate the form of block or regional distribution.
An experimental study on the pressure drop in a column of inner diameter 600 mm,packed with Mellapak350 Y metal corrugated plate structured packing,is carried out.The column is fixed on a swaying platform,which can achieve six degrees of freedom swaying.We study the influence of the packing pressure drop in the stationary state and shaking state with different gas velocities and different spray densities.The 2D and 3D CFD models based on the Mellapak350 Y packing are established,to study the pressure distribution of the packing column and flow path of the packing under the conditions of shaking.In the modeling process,we add the UDF program to achieve the shaking condition of the model.The results show that the shaking has no significant effect on the overall pressure drop of the packing,but the larger pitching or pitching-rolling coupling sloshing will increase the pressure drop to a certain extent when the gas velocity is large.At the same time,the strip distribution of the pressure drop of the packing will be changed in the axial direction,and even demonstrate the form of block or regional distribution.
引文
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[2]MEEK H,WCV W,SCHIER M.The generic LNG FPSO a quick&cost-effective way to monetize stranded gas field[R].SPE 115295-MS,2008.
[3]YAN G,JU Y.LNG-FPSO:offshore LNG solution[J].Frontiers in Energy,2008,2(3):249-255.
[4]张春.南海荔湾气田浮式LNG预处理技术研究[D].青岛:中国石油大学,2011.ZHANG Chun.Studies on floating LNG pretreatment technology of Liwan gas field in the South China Sea[D].Qingdao:China University of Petroleum,2011.
[5]CULLINANE J,YEH N,GRAVE E.Effects of tower motion on packing efficiency[R].SPE 143766-MS,2011.
[6]朱建鲁,李玉星,王武昌,等.海上天然气液化工艺流程优选[J].天然气工业,2012,32(3):98-104,133.ZHU Jianlu,LI Yuxing,WANG Wuchang,et al.Optimal selection of natural gas liquefaction process for an LNGFPSO unit[J].Natural Gas Industry,2012,32(3):98-104,133.
[7]TANG Jianfeng,ZHANG Chun,GUO Qing,et al.Studies on simulation and optimization of gloating LNG acid gas removal process with mixed amine solvent:International Conference on Electrical and Control Engineering,2011[C].Yichang:IEEE,2011.
[8]晏莱,周三平.现代填料塔技术发展现状与展望[J].化工装备技术,2007,28(3):29-34.YAN Lai,ZHOU Sanping.Research progress actually and expectation of modern packed column technology[J].Chemical Equipment Technology,2007,28(3):29-34.
[9]王闯,张客厅,刘猛杰,等.填料塔发展与现状[J].河南科技,2013(10):92,142.WANG Chuang,ZHANG Keting,LIU Mengjie,et al.Development and present situation of packed tower[J].Journal of Henan Science and Technology,2013(10):92,142.
[10]李雪锋.立装规整填料的性能实验研究[D].西安:西北大学,2011.LI Xuefeng.Experimental study on vertical load performance of structured packing[D].Xian:Northwest University,2011.
[11]罗文媛.规整填料塔内气-液两相并流流动的传递性能研究[D].天津:天津大学,2010.LUO Wenyuan.Study on transport phenomena about gasliquid co-current flow in structured packing column[D].Tianjin:Tianjin University,2010.
[12]CULLINANE J T,YEH N,GRAVE E.Effects of tower motion on packing efficiency:Society of Petroleum Engineers-Brazil Offshore Conference,2011[C].Brazil,2011.
[13]崔静,董岸杰,张世地,等.新型高效规整填料的性能研究[J].化学工程,2008(3):1-5.CUI Jing,DONG Anjie,ZHANG Shidi,et al.Study on performance of new high-efficiency structured packing[J].Chemical Engineering,2008(3):1-5.
[14]张鹏,刘春江,唐忠利,等.规整填料塔内气相流动的计算流体力学模拟[J].天津大学学报,2005,38(6):503-507.ZHANG Peng,LIU Chunjiang,TANG Zhongli,et al.CFD simulations of single-phase gas flow in a structured packing column[J].Journal of Tianjin University,2005,38(6):503-507.
[15]冯换春.填料塔内两相流动与相界面传质的数值模拟研究[D].西安:西安建筑科技大学,2014.FENG Huanchun.The numerical simulation study about the two phase flow dynamics and mass transfer in the packed column[D].Xian:Xian University of Architecture and Technology,2014.
[16]RAYNAL L,BOYER C,BALLAGUET J P.Liquid holdup and pressure drop determination in structured packing with CFD simulations[J].Canadian Journal of Chemical Engineering,2008,82(5):871-879.