文丘里洗涤器本科毕业论文-刘付杰成

本科生毕业论文题目文丘里洗涤器的实验研及CFD模拟学院名称化学工程学院专业名称化学工程与工艺学生姓名刘付杰成指导教师曹睿副教授起止时间：2016年3月1日至2016年6月10日单位代码：11414学号：2012010562摘要I摘要我国化学工业实现可持续发展现状，我国化学工业经历了半个世纪的发展,已经形成了门类比较齐全、品种大体配套并基本可以满足国内需要的化学工业体系，但随之而来的是严重的空气污染。在工业生产加工过程中会产生大量的带尘烟道气，是给大气带来严重污染的主要因素之一，但目前关于这方面的研究较少，本文是在煤化工除尘条件下对影响文丘里洗涤器水力性能的结构参数及工作状态进行研究，通过CFD计算流体力学软件对文丘里洗涤器内部流场进行探究。以进口管直径50mm的文丘里管作为研究对象，进行单变量研究。运用实验和CFD流体力学数值模拟相结合的方法，研究不同进流量、喉管长度和扩张段锥度等结构参数对文丘里洗涤器出口断面流速、管内压力分布和内部流动均匀性的影响。对喉管长度分别为50mm，75mm和100mm的文丘里管进行单空气和空气—水两相实验，并且在实验的基础上分析流场分布。再对单空气相进气的文丘里管进行数值模拟验证，对比数值模拟和实验分析的结果，最终确定文丘里管优质运行状态下进气量、喉管长度和扩张段锥度的选取。关键字：除尘；文丘里洗涤器；压降ABSTRACTIIVenturiscrubberexperimentalstudyandCFDsimulationABSTRACTThechemicalindustrytorealizethesustainabledevelopmentofourcountry,thedevelopmentofchemicalindustryinChinahasexperiencedhalfacenturyandhasformedarelativelycompletecategories,varietiesingeneralandbasiccanmeettheneedsofthedomesticchemicalindustrysystem.Butwhatfollowedwasaseriousairpollution.Intheprocessofindustrialproductionwillproducelargeamountsofdustfluegas,isoneofthemainfactorsthatbringtheatmosphereseriouspollution,butatpresenttheresearchaboutthisaspectisless,Thisarticleisbasedonresearchthatstudythestructureparametersofinfluence_venturiscrubberhydraulicperformance,ToexploreinternalflowfieldofventuriscrubbersbyCFDcomputationalfluiddynamicssoftware.Inthispaper,basedontheimportofpipediameterof50mmventuritubeastheresearchobject,carriesonthesinglefactorstudy.CombiningexperimentalandCFDnumericalsimulationmethodtoexplorehowdifferentinletflowrate,throatpipelength,expansiontaperandotherstructureparameterseffectonexportsectionvelocity,pressuredistributionandtheinternalflowuniformitywithinthetube.Thelengthofthechokesareprovided50mm,75mm,100mmventuritubeforsingleairandair-watertwo-phaseexperiments,meanwhileanalyzetheflowfieldontheexperimentalbasis.Forsinglephaseairintakeventuritubeisusedtonumericallysimulatetestandverify,comparingtheresultsofnumericalsimulationresultsandexperimentalanalysis,andfinallydeterminetheairinflow，throatpipelength,expansiontapertoensureVenturiscrubberinafineoperation.KeyWords：dustfluegas；venturiscrubber；pressuredrop目录III目录摘要...........................................................................................................................IABSTRACT.............................................................................................................II前言..................................................................................................................-1-第1章文献综述..................................................................................................-2-1.1课题背景...............................................................................................-2-1.1.1我国煤化工发展现状................................................................-2-1.1.2煤化工加工流程........................................................................-2-1.1.3减少空气污染的措施................................................................-4-1.2除尘.......................................................................................................-4-1.2.1工艺除尘技术应用现状............................................................-4-1.2.2除尘方式....................................................................................-5-1.3流体流动[15]..........................................................................................-6-1.3.1流体及其特点............................................................................-6-1.3.2流体的性质................................................................................-6-1.4文丘里洗涤器的除尘机理...................................................................-7-1.4.1文丘里管....................................................................................-7-1.4.2除尘机理....................................................................................-8-1.5压降模型...............................................................................................-9-1.5.1Calvert压降模型........................................................................-9-1.5.2环状流压降模型......................................................................-10-1.5.3段振亚模型..............................................................................-14-1.6液滴模型.............................................................................................-18-1.6.1Nukiyama和Tanasawa液滴直径关联式...............................-18-1.6.2Bolletal液滴直径关联式.......................................................-18-1.7软件介绍.............................................................................................-19-1.7.1FLUENT介绍..........................................................................-19-1.7.2GAMBIT介绍..........................................................................-19-1.7.3ORIGIN介绍...........................................................................-20-1.8本章小结.............................................................................................-20-第2章文丘里洗涤器扩张角...........................................................................-21-目录IV2.1文丘里洗涤器扩张角度确定..........