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1、兰州交通大学毕业设计(论文)摘要板式换热器是由一系列具有一定波纹形状的金属片叠装而成的一种新型高效紧凑换热器。各相邻板片之间形成薄矩形通道,通过板片进行热量交换。板式换热器的传热性能与板面的波纹形状、尺寸及流程组合方式都有密切关系。它与常规的管壳式换热器相比,在相同的流动阻力和泵功率消耗情况下,其传热系数高,结构紧凑,占地面积小,价格低,安装方便,易清洗,在适用的范围内有取代管壳式换热器的趋势。板式换热器应用很广,尤其是更适宜用于医药、食品、制酒、化工等工业,并且随着板型、结构上改进,正在进一步扩大它的应用领域。本文对板式换热器的
2、发展及应用领域作了简要的介绍,通过板式换热器的传热原理,进行板式换热器热力计算和阻力计算,在满足了校核条件下,设计出板片波纹形式为双人字形、板片数为149片的并联流程组合的可拆卸式板式换热器。在此基础上,用AutoCAD绘制板式换热器零件图及装配图。设计的换热器工艺性好,安全可靠,便于操作、安装,成本低。关键词:板式换热器;结构设计;传热计算;阻力计算Ⅰ兰州交通大学毕业设计(论文)AbstractPlateheatexchangerisanewcompactandefficientheatexchanger,consistsofa
3、seriesofcorrugatedsheetmetalwithacertainshapemadeofstacked.Formedthinrectangularchannelsbetweenadjacentplates,throughplatesexchangeheat.Plateheatexchangerheattransferperformancearecloselyrelatedwithplate’scorrugatedshape,sizeandprocesscombinations.Comparedwiththeconve
4、ntionalshellandtubeheatexchanger,atthesameflowresistanceandpumppowerconsumption,ithastheadvantagesofhighheattransfercoefficient,compact,smallfootprint,lowprice,easytoinstallandclean.Ithasthetrendsreplaceshellandtubeheatexchangerwithinapplicablerange.Plateheatexchanger
5、applicationsisverybroad,especiallymoresuitableformedicine,food,wine,chemicalandotherindustries.Withtheimprovementofplate’sshapeandstructural,itsfieldofapplicationisfurtherexpanding.Inthispaper,thedevelopmentandapplicationsofplateheatexchangerwasmadeabriefintroduction.
6、Throughtheprinciplesofheattransferoftheplateheatexchanger,performedthermalandresistancecalculations,undermeetingthecheckingconditions,designsdetachableplateheatexchanger,thatplate’scorrugatedshapeisdoubleherringbone,platenumberis149,processcompositionisparallel.Onthis
7、basis,usingAutoCADtodrawplateheatexchangerpartsandassemblydrawings.Designedheatexchangertechnologyisgood,safe,reliable,easytooperate,install,andlowcost.Keywords:plateheatexchanger;structuraldesign;heattransfercalculation;resistancecalculationⅡ兰州交通大学毕业设计(论文)目录摘要IAbstra
8、ctII1绪论11.1板式换热器的学术背景及意义11.2我国设计制造情况21.3国外著名厂家及其产品32板式换热器基本构造和工作原理62.1板式换热器基本构造和工作原理62.2板式换热器分类62.3流程组合方式72.4框架形式92.5板片92.6密