漆包线生产中挥发性有机溶剂回收工艺

作者:李明旭漆包线生产中挥发性有机溶剂回收工艺学士学位论文指导教师：葛红光专业名称：化学工程与工艺2012年6月8日陕西理工学院毕业设计第1页共47页漆包线生产中挥发性有机溶剂回收工艺李明旭（陕西理工学院化学与环境科学学院化学工程与工艺专业081班，陕西汉中723001）指导教师：葛红光[摘要]本设计是500t/年漆包线生产中废气处理工段有机溶剂回收的工艺设计。主要包括四部分:一、绪论。二、工艺方法的论证及选择(废气的冷凝，吸收及吸收剂解吸等工艺),工艺流程详述和说明。三、主要设备的计算，论证和选型(空气冷却器，水冷凝器，吸收塔，膜蒸发器，吸附器等等)。四、非工艺部分要求（防火防爆，给水排水，供电，土建，安全与劳保等）。本设计所采用的工艺流程分三部分：冷却冷凝部分、吸收分离部分和吸附净化部分。冷凝冷却部分以冷空气和冷水为介质，使废气温度降低到沸点之下，并有效的利用其带有的大量热量。吸收分离部分，以白矿油为介质，回收废气中含有的挥发性有机溶剂，达到回收目的。吸附净化部分是以活性碳为吸附剂，对已经过吸收的废气进行进一步的净化处理，以达到排废要求，减少环境污染。[关键词]漆包线；二甲苯；甲酚；白矿油；废气回收陕西理工学院毕业设计第2页共47页EnameledwireproductionvolatileorganicsolventrecoveryprocessLiMingxuTheinstituteofchemistryandchemicalengineeringofHunanUniversityofChemicalengineeringandprocessengineeringTeacher:GeHongguangAbstract:Thisdesignisthedesignoforganicsolventrecoveryprocess,inthetreatmentingsectionofwastegasfora500t/yearenameledwireproduction.Itmainlyincludes4parts:A,theintroduction.Second,thecomparisonandselectionofprocessmethod,thetechnicalprocessdescribedanddiscussed.Three,thecalculation,argumentationandselectionofmainequipment.Five,therequirementsofprocess.Thisdesignusingtheprocessflowofthreeparts:coolingandcondensationpart,absorptionandseparationpartandpurificationofadsorptionpart.Condensationandcoolingusingcoldairandcoldwaterformedium,madethewastegas'stemperaturereducedtoundertheboilingpoint,andeffectiveuseditwithalotofheat.Absorptionandseparationpart,usingwhitemineraloilasmedium,recyclingvolatileorganicsolventinwastegas.Adsorptionandpurificationusingactivatedcarbonasthemedium,forthefurtherpurification,inordertoachievetherowofwasterequirements,todecreaseenvironmentalpollution.Keywords:enameled;dimethylbenzene;cresol;whitemineraloil;recyclingofwastegas陕西理工学院毕业设计第3页共47页1绪论....................................................71.1漆包线...................................................71.2我国有机溶剂使用现状.....................................71.2.1工业有机溶剂的分类....................................71.2.2工业有机溶剂的特性....................................81.3二甲苯苯酚等物质的危害及国家规定..........................91.4废有机溶剂处理方法的国内外现状分析........................91.4.1国内外处理现状........................................91.4.2处理方法分析..........................................91.4.3回收方法的分析.......................................101.4.4回收技术的选择.......................................111.4设计任务................................................112废气回收工段的工艺过程及工艺选择.......................132.1本设计工艺路线祥述......................................132.2废气空气冷凝工艺........................................132.3废气水冷凝工艺..........................................132.4吸收工艺................................................132.5蒸发分离工艺............................................142.6吸附排废工艺............................................143主要设备论证及选型.....................................153.1换热器..................................................153.1.1换热器类型...........................................153.1.2流程安排.............................................153.1.3加热剂和冷却剂的选择.................................153.1.4流体进出口温度的确定.................................163.2吸收塔..................................................163.2.1吸收塔类型...........................................163.2.2填料的类型...........................................163.2.3填料塔附属结构.......................................163.3蒸发器..................................................173.3.1循环型蒸发器.........................................173.3.2单程型蒸发器.........................................173.4吸附器..................................................173.4.1吸附剂...............................................173.4.2吸附剂的种类.........................................17陕西理工学院毕业设计第4页共47页4主要设备工艺计算、选型.................................194.1总工艺的处理量计算......................................194.2空气冷凝器计算..........................................194.2.1求总热交换量Q.......................................194.2.2求平均传热温差mt....................................204.2.3确定传热系数K.......................................204.2.4求传热面积pA.........................................204.2.5选择所用换热器型号...................................214.3水冷凝器1计算..........................................214.3.1求总的热交换量Q.....................................214.3.2确定换热器的总传热系数K.............................224.3.3确定冷却水的用量L...................................224.3.4废气的冷凝量L.......................................224.3.5求平均传热温差mt....................................224.3.6求总传热面积A.......................................234.3.7选择管径及管速.......................................234.3.8选取管长、确定管程数和总管数.........................234.3.9平均传热温差校正及壳程数.............................244.3.10管子排列............................................264.3.11管心距..............................................274.3.12壳体内径............................................274.3.13折流板和支撑板......................................274.3.14选择换热器的型号....................................284.4吸收塔设计计算..........................................284.4.1填料的特性...........................................284.4.2进出塔个组分计算.....................................284.4.3求吸收剂的流量LG.....................................29