喷淋塔的参数化设计及数值模拟分析

学校代码10530学号200907031469分类号X5密级硕士学位论文喷淋塔的参数化设计及数值模拟分析学位申请人潘文惠指导教师罗显光副教授、刘吉普教授学院名称机械工程学院学科专业化工过程机械研究方向过程装备新技术与CAD二零一二年五月二十一日ParametricDesignandNumericalSimulationofSprayTowerCandidatePanWenhuiSupervisorProf.LuoXianguangandLiuJipuCollegeCollegeofMechanicalEngineeringProgramChemicalProcessMachinerySpecializationANewTechnologyofProcessEquipmentandCADDegreeMasterofEngineeringUniversityXiangtanUniversityDateMay21,2012湘潭大学学位论文原创性声明本人郑重声明：所呈交的论文是本人在导师的指导下独立进行研究所取得的研究成果。除了文中特别加以标注引用的内容外，本论文不包含任何其他个人或集体已经发表或撰写的成果作品。对本文的研究做出重要贡献的个人和集体，均已在文中以明确方式标明。本人完全意识到本声明的法律后果由本人承担。作者签名：日期：年月日学位论文版权使用授权书本学位论文作者完全了解学校有关保留、使用学位论文的规定，同意学校保留并向国家有关部门或机构送交论文的复印件和电子版，允许论文被查阅和借阅。本人授权湘潭大学可以将本学位论文的全部或部分内容编入有关数据库进行检索，可以采用影印、缩印或扫描等复制手段保存和汇编本学位论文。涉密论文按学校规定处理。作者签名：日期：年月日导师签名：日期：年月日摘要I摘要吸收塔是脱硫系统的核心设备，喷淋塔作为我国最早引用的塔型，因其工艺成熟、结构简单和运行可靠而一直被我国脱硫领域所广泛应用。在对喷淋塔进行设计时，相关参数主要依靠各公司设计者的经验和反复的模拟优化确定，此过程工作量大、设计周期长且效率低下。因此，本文以提高喷淋塔的设计效率及优化其性能为出发点，进行了如下研究：首先，选择vb语言在SolidWorks平台上开发出集喷淋塔设计及三维绘图于一体的喷淋塔参数化设计系统。该系统包括自动设计计算模块、数据库模块、模型库模块和参数化驱动模块四大模块。运用该系统，可自动完成喷淋塔设计与绘图工作，从而有效的提高设计开发效率，减轻大量重复劳动量。其次，在Fluent软件中，采用Euler-Lagrange模型模拟喷淋塔内两相流场。通过研究入口烟道长度、入口烟道倾角、入口烟道底部距浆液池液面高度、空塔气速和液气比对喷淋塔性能的影响，发现：在采取塔前喷淋塔降温措施时，需要增加喷淋的入口烟道长度以增强降温效果；入口烟道倾角的最佳取值为6-12°；入口烟道底面距浆液池液面高度取值在2.7m左右范围时，塔内整体性能较好；提高空塔气速对整个塔内的流场趋势影响不大，但随着速度增大，塔内压力损失及颗粒的逃逸量都会随之增大，因此，在某种特定情况下，可采取提高空塔气速的方法来减少设备投资和占地面积；塔内压力损失随液气比增大而增大，但液气比在10.8—13.4L/m3范围内变化时，塔内压力损失的变化不太明显，此时，采取增加液气比来提高脱硫率的方法比较可行。关键词：脱硫；喷淋塔；参数化设计；模型；数值模拟。AbstractIIAbstractAbsorptiontoweristhecoreequipmentofdesulfurizationsystem.AsthefirsttypeadoptedinChina,spraytowerhasbeenalwayspopularinChina’sdesulfurizationfieldforitsmaturetechnology,simplestructureandreliableoperation.Atpresent,whenspraytowerisbeingdesigned,theoptimizationanddeterminationofrelatedparametersreliesontheexperienceofdesignersandrepeatedsimulation,whichdemandsgreatworkloadandlongdesigncyclebutleadstolowefficiency.Therefore,inordertoraisethedesigningefficiencyofspraytowerandoptimizeitsperformance,thisthesisconductsresearchesasfollows:First，applyVBLanguagetothesecondarydevelopmentofSolidWorkstodevelopparameterizeddesignsystemofspraytowerwhichcombinesspraytowerdesigningand3Ddrawing.Includingsuchfourmodulesasautomadesigncomputingmodule,databasemodule,modelbasemoduleandparameterizeddesigningmodule.Thissystemcanautomaticallycompletespraytowerdesigninganddrawing,whichwillnotonlyraisetheefficiencyofdesigninganddevelopmentbutalsoavoidalotofwastefulduplicationofeffort.Second，whenFluentsoftwareisused,Euler-Lagrangemodelcansimulatethetwo-phaseflowfield.Thisthesisexplorestheinfluenceoflengthofinletfluegasduct、inclinationangleofinletfluegasduct、thedistance、gasspeedinemptytowerandliquid-gasratioontheperformanceofspraytower,andobtainsthefollowingfindings:Intemperaturereductionofspraytowerbeforethegascomeintothetower,suitableincreaseoflengthofinletfluegasductcanraiseefficiencyofthereduction;Theoptimalvalofinclinationangleis6°-12°;Whenthedistancebetweenthebottomofinletfluegasductandthefluidlevelofslurrypondisabout2.7m,thewholeperformanceisrelativelygood;raisingthegasspeedinemptytowercanreduceequipmentinvestmentandfloorarea;andwhenliquid-gasratiorangesfrom10.8-14L/m3,thelossofresistanceinthetowerisnotobvious,inwhichcaseraisingtheliquid-gasratiocanraisethedesulfurizationdegree.Keywords:desulfurization;spraytower;parametricdesign;model;numericalsimulation.目录III目录摘要······························································································IAbstract···························································································II目录····························································································III第一章绪论·····················································································11.1二氧化硫现状与烟气脱硫····························································11.1.1二氧化硫污染及现状·························································11.1.2燃煤脱硫技术··································································11.2喷淋吸收塔简介········································································31.3国内外研究现状········································································41.3.1参数化设计在塔设计应用上的研究现状··································41.3.2喷淋塔的数值模拟分析研究现状···········································61.4课题研究的主要背景、意义及内容················································6第二章喷淋塔的参数化设计································································82.1参数化设计概述·······································································82.2SolidWorks二次开发方法简介······················································82.2.1SolidWorks软件二次开发技术··············································82.2.2利用VB实现SolidWorks二次开发·····································92.3喷淋塔参数化设计系统开发······················································102.3.1喷淋塔设计计算模块的建立[56]··········································102.3.2喷淋塔零件模型库的建立··················································112.3.3喷淋塔参数数据库的建立·················································122.3.4喷淋塔各零件参数化建模的实现········································132.4零件的参数化设计实现··········