PM2.5和PM10对输运管道的冲蚀失效数值模拟
|
摘要
为比较不同类型管道输运PM2.5和PM10的特点,采用CFD数值模拟方法,以某矿选矿厂输运管道为模型,基于气固两相流理论,应用Fluent模拟了不同风速下圆管和方管内冲蚀速率大小。结果表明,PM2.5和PM10对管壁最大冲蚀速率值出现位置为圆管较分散,方管较为集中且在管道进口端;圆管管壁最大冲蚀速率及平均冲蚀速率都比方管小,方管管壁最大冲蚀速率值是圆管管壁的3～6.5倍,因此选取管型时应考虑选取圆管作为输运部件;PM2.5和PM10可分别选用风速18、12m/s圆形管道输运较佳,其最大冲蚀速率值分别为1.8×10~(-12)、1.21×10~(-12) kg/(m~2·s);管壁最大冲蚀速率变化趋势,PM2.5比PM10更加具有规律性。
In order to compare the characteristics of PM2.5 and PM10 transported by different types of pipelines,the CFD numerical simulation method is adopted to model the transport pipeline of a certain ore dressing plant.Based on the gas-solid two-phase flow theory,the erosion rate value of circular and square tubes at different wind speeds was simulated by Fluent software.The results show that the appearance position of the maximum erosion rates of PM2.5 and PM10 on the pipeline wall is that the circular pipe is dispersed and the square pipe is more concentrated and at the inlet end of the pipe.Both the maximum erosion rate and average erosion rates of the circular tube wall are smaller,the maximum erosion rate of the square pipe wall is 3—6.5 times that of the circular tube pipe wall,so the circular tube can be considered as the transport part.PM2.5 and PM10 can be transported respectively in round pipe with a speed of 18 and 12 m/s respectively,the maximum erosion rate is respectively 1.8×10~(-12),1.21×10~(-12) kg/(m~2·s).The changing trend of the wall maximum erosion rate of PM2.5 is more regular than PM10
In order to compare the characteristics of PM2.5 and PM10 transported by different types of pipelines,the CFD numerical simulation method is adopted to model the transport pipeline of a certain ore dressing plant.Based on the gas-solid two-phase flow theory,the erosion rate value of circular and square tubes at different wind speeds was simulated by Fluent software.The results show that the appearance position of the maximum erosion rates of PM2.5 and PM10 on the pipeline wall is that the circular pipe is dispersed and the square pipe is more concentrated and at the inlet end of the pipe.Both the maximum erosion rate and average erosion rates of the circular tube wall are smaller,the maximum erosion rate of the square pipe wall is 3—6.5 times that of the circular tube pipe wall,so the circular tube can be considered as the transport part.PM2.5 and PM10 can be transported respectively in round pipe with a speed of 18 and 12 m/s respectively,the maximum erosion rate is respectively 1.8×10~(-12),1.21×10~(-12) kg/(m~2·s).The changing trend of the wall maximum erosion rate of PM2.5 is more regular than PM10
引文
[1]徐映如,王丹侠,张建文,等.PM 10和PM 2.5危害、治理及标准体系的概况[J].职业与健康,2013,29(1):117-119.XU Yingru,WANG Danxia,ZHANG Jianwen,et al.General situation for the hazards,control and evaluation standard system of PM 10and PM 2.5[J].Occupation and Health,2013,29(1):117-119.
[2]万义亮,王海宁,张迎宾.西安市的PM2.5污染特征分析研究[J].环境科学与技术,2016,39(8):89-93,98.WANG Yiliang,WANG Haining,ZHANG Yingbin.Pollution characteristics of PM2.5in Xi'an City[J].Environmental Science&Technology,2016,39(8):89-93,98.
[3]李翔,李介普,幺成,等.输气管道冲蚀磨损数值模拟研究[J].当代化工,2015,44(11):2714-2716.LI Xiang,LI Jiepu,YAO Cheng,et al.Numerical simulation investigation on erosion of the gas pipeline[J].Contemporary Chemical Industry,2015,44(11):2714-2716.
[4]彭文山,曹学文.管道参数对液/固两相流弯管流场及冲蚀影响分析[J].中国腐蚀与防护学报,2016,36(1):87-96.PENG Wenshan,CAO Xuewen.Influence of pipe parameters on flow field of liquid-solid two-phase flow and erosion of pipe bend[J].Journal of Chinese Society for Corrosion and Protection,2016,36(1):87-96.
[5]潘一,孙林,杨双春,等.国内外管道腐蚀与防护研究进展[J].腐蚀科学与防护技术,2014,26(1):77-80.PAN Yi,SUN Lin,YANG Shuangchun,et al.Research progress of pipeline corrosion and protection at home and abroad[J].Corrosion Science and Protection Technology,2014,26(1):77-80.
[6]偶国富,许根富,朱祖超,等.弯管冲蚀失效流固耦合机理及数值模拟[J].机械工程学报,2009,45(11):119-124,132.OU Guofu,XU Genlin,ZHU Zuchao,et al.Fluidstructure interaction mechanism and numerical simulation of elbow erosion failure[J].Journal of Mechanical Engineering,2009,45(11):119-124,132.
[7]宋金仓,张明星,林龙沅,等.基于计算流体动力学的颗粒磨蚀管道弯头研究[J].中国粉体技术2016,22(1):1-5.SONG Jincang,ZHANG Mingxing,LIN Longyuan,et al.Research on erosion of particles to pipeline elbow based on computational fluid dynamics[J].China Powder Science and Technology,2016,22(1):1-5.
[8]唐婵,张靖周.含微小颗粒气流横掠圆管束表面的沉积特性[J].中南大学学报(自然科学版),2015,46(12):4679-4685.TANG Chan,ZHANG Jingzhou.Deposition characteristics of tube bundles in particulate cross-flow[J].Journal of Central South University(Science and Technology),2015,46(12):4679-4685.
[9]高德真,李佳璐,李德臣,等.基于FLUENT气固两相流数值模拟与分析[J].辽宁石油化工大学学报,2015,35(4):5-8,15.GAO Dezhen,LI Jialu,LI Dechen,et al.Numerical analysis of the gas-solid two-phase based on FLUENT[J].Journal of Liaoning Shihua University,2015,35(4):5-8,15.
[10]张利珍,李运泽,王浚.气固两相流风洞内颗粒运动特性研究[J].系统仿真学报,2007(14):3200-3202.ZHANG Lizhen,LI Yunze,WANG Jun.study on particle flow character in gas/solid two-phase wind tunnel[J].Journal of System Simulation,2007(14):3200-3202.
[11]王海宁,王花平.矿用空气幕数值模拟研究[J].中国钨业,2009,24(4):13-16.WANG Haining,WANG Huaping.The numerical simulation research of mining air curtain[J].China Tungsten Industry,2009,24(4):13-16.
[12]许小媛,于本成.基于Fluent的复杂边界条件流动传热数值模拟[J].信息与电脑(理论版),2016(1):1-2.XU Xiaoyuan,YU Bencheng.Numerical simulation of flow heat transfer in complex boundary conditions based on Fluent[J].China Computer&communication(Theory version),2016(1):1-2.
[2]万义亮,王海宁,张迎宾.西安市的PM2.5污染特征分析研究[J].环境科学与技术,2016,39(8):89-93,98.WANG Yiliang,WANG Haining,ZHANG Yingbin.Pollution characteristics of PM2.5in Xi'an City[J].Environmental Science&Technology,2016,39(8):89-93,98.
[3]李翔,李介普,幺成,等.输气管道冲蚀磨损数值模拟研究[J].当代化工,2015,44(11):2714-2716.LI Xiang,LI Jiepu,YAO Cheng,et al.Numerical simulation investigation on erosion of the gas pipeline[J].Contemporary Chemical Industry,2015,44(11):2714-2716.
[4]彭文山,曹学文.管道参数对液/固两相流弯管流场及冲蚀影响分析[J].中国腐蚀与防护学报,2016,36(1):87-96.PENG Wenshan,CAO Xuewen.Influence of pipe parameters on flow field of liquid-solid two-phase flow and erosion of pipe bend[J].Journal of Chinese Society for Corrosion and Protection,2016,36(1):87-96.
[5]潘一,孙林,杨双春,等.国内外管道腐蚀与防护研究进展[J].腐蚀科学与防护技术,2014,26(1):77-80.PAN Yi,SUN Lin,YANG Shuangchun,et al.Research progress of pipeline corrosion and protection at home and abroad[J].Corrosion Science and Protection Technology,2014,26(1):77-80.
[6]偶国富,许根富,朱祖超,等.弯管冲蚀失效流固耦合机理及数值模拟[J].机械工程学报,2009,45(11):119-124,132.OU Guofu,XU Genlin,ZHU Zuchao,et al.Fluidstructure interaction mechanism and numerical simulation of elbow erosion failure[J].Journal of Mechanical Engineering,2009,45(11):119-124,132.
[7]宋金仓,张明星,林龙沅,等.基于计算流体动力学的颗粒磨蚀管道弯头研究[J].中国粉体技术2016,22(1):1-5.SONG Jincang,ZHANG Mingxing,LIN Longyuan,et al.Research on erosion of particles to pipeline elbow based on computational fluid dynamics[J].China Powder Science and Technology,2016,22(1):1-5.
[8]唐婵,张靖周.含微小颗粒气流横掠圆管束表面的沉积特性[J].中南大学学报(自然科学版),2015,46(12):4679-4685.TANG Chan,ZHANG Jingzhou.Deposition characteristics of tube bundles in particulate cross-flow[J].Journal of Central South University(Science and Technology),2015,46(12):4679-4685.
[9]高德真,李佳璐,李德臣,等.基于FLUENT气固两相流数值模拟与分析[J].辽宁石油化工大学学报,2015,35(4):5-8,15.GAO Dezhen,LI Jialu,LI Dechen,et al.Numerical analysis of the gas-solid two-phase based on FLUENT[J].Journal of Liaoning Shihua University,2015,35(4):5-8,15.
[10]张利珍,李运泽,王浚.气固两相流风洞内颗粒运动特性研究[J].系统仿真学报,2007(14):3200-3202.ZHANG Lizhen,LI Yunze,WANG Jun.study on particle flow character in gas/solid two-phase wind tunnel[J].Journal of System Simulation,2007(14):3200-3202.
[11]王海宁,王花平.矿用空气幕数值模拟研究[J].中国钨业,2009,24(4):13-16.WANG Haining,WANG Huaping.The numerical simulation research of mining air curtain[J].China Tungsten Industry,2009,24(4):13-16.
[12]许小媛,于本成.基于Fluent的复杂边界条件流动传热数值模拟[J].信息与电脑(理论版),2016(1):1-2.XU Xiaoyuan,YU Bencheng.Numerical simulation of flow heat transfer in complex boundary conditions based on Fluent[J].China Computer&communication(Theory version),2016(1):1-2.