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西南科技大学本科毕业设计Southwestuniversityofscienceandtechnology本科毕业设计水泥厂通风除尘设计与计算学院名称环境与资源学院专业名称安全工程学生姓名田亮学号20110970指导教师魏勇讲师二〇一五年六月西南科技大学本科毕业设计1水泥厂通风除尘设计与计算摘要：在水泥生产过程中，每生产1t水泥，大约要产生10多立方米的废气，这其中含有5.5~10kg的粉尘颗粒，这些粉尘将对人体、工农业生产、企业经济效益带来消极影响。我国水泥厂行业通风除尘处于起步阶段。在技术和器材方面缺乏，以导致大部分工厂设备简陋。执行能力差，管理水平低。保护自身安全和健康的意识较弱，相关职业病危害着群众。资源利用率低，产品质量没有保证。世界发达国家对水泥窑的排放要求愈来愈严格，欧盟IPPC(综合污染预防与控制)指令(96、61、EC)关于《水泥制造业的最佳可用技术(BAT)与污染物排放指南》指出：采用袋除尘和电除尘技术，对应的排放控制水平为20一30mg／Nm3这份文件将成为欧洲各国制定排放标准的依据。(如德国、荷兰)水泥工业粉尘排放甚至要求达10mg／Nm3，尤其近年来“趋零排放”已为一种主流。本文设计对系统粉尘的类型和特点，通过计算风量和阻力等因素。在窑尾设计了4个排风罩，利用9根风管连接除尘器和通风机设计出一个完整的通风除尘系统。主要应用阻力平衡法，即以环路的阻力计算，打到支路和干路的阻力平衡来设计管路。通过粉尘量的多少选择排风罩。通过系统水力计算和滤料，阻力，风量选择合适的除尘器。通过风量和风压的计算选择通风机。关键字：排风罩；风管；除尘器；排风机。西南科技大学本科毕业设计2DesignandcalculationofventilationanddustremovalincementplantAbstract:inthecementproductionprocess,eachproduction1tcement,abouttoproducemorethan10cubicmetersofwastegas,thisContains5.5~10kgdustparticles,thesedustwillbethehuman,industrialandagriculturalproduction,enterpriseeconomicbenefitsbringNegativeinfluence.TheventilationanddustremovalofcementplantindustryinChinaisintheinitialstage.LackoftechnologyandequipmenttoguideMostofthefactoryequipmentsimple.Poorexecutiveability,lowlevelofmanagement.ProtecttheconsciousnessofselfsafetyandhealthWeak,therelevantoccupationaldiseasesendangerthemasses.Theutilizationofresourcesislowandthequalityoftheproductsisnoguarantee..WorlddevelopedcountriesTheemissionsofcementkilnsarebecomingstricterandstricter,EUIPPC(comprehensivepollutionpreventionandcontrol)instruction(96,61,EC)Thebestavailabletechnology(BAT)andpollutantdischargeguideforcementmanufacturingindustry:theuseofbagdustandelectricityBasisfordischargestandards.(suchasGermany,Holland)cementindustrydustemissionsevenupto10mg/Nm3,especiallyInrecentyears,thezeroemissionshasbecomeamainstream.Thispaperdesignsthetypeandcharacteristicsofthedust,andthroughcalculatingtheairquantityandresistancefactor.ChooseappropriateTakewindcover,dustremoverandfantosolvethewasteanddustofcementkilntail.Mainapplicationofresistancebalancemethod,Theloopresistancecalculation,hitthetrunkandbranchresistancebalance.Throughdustamountofchoiceexhausthood.Throughthesystemhydrauliccalculation,selecttheappropriatedustcollectorandventilator.Keywords:exhausthood，airduct，dustremover，exhaustfan西南科技大学本科毕业设计3目录第一章绪论..............................................................................................11.1选题背景.......................................................................................11.2设计依据......................................................................................11.3设计主要内容.................................................................................2第二章工厂状况及粉尘特点.....................................................................32.1企业概况.......................................................................................32.2工艺流程.......................................................................................32.3窑尾概况.......................................................................................42.4水泥厂窑尾粉尘的来源...................................................................52.5粉尘的特点....................................................................................52.6水泥厂窑尾除尘难点与措施.............................................................72.7粉尘的危害....................................................................................8第三章通风除尘系统设计与计算..............................................................103.1局部排风罩.................................................................................103.1.1决定排风罩控制有害物的效果的主要因素：.................................103.1.2设计原则...................................................................................103.1.3分类及其特点............................................................................103.1.4设计局部排风罩.........................................................................11西南科技大学本科毕业设计43.2风管的设计..................................................................................163.2.1材料和设计................................................................................163.2.2管径和单位长度摩擦阻力............................................................163.2.3合流三通局部阻力系数...............................................................173.2.4局部阻力与摩擦阻力..................................................................193.2.5对并联管路进行阻力平衡............................................................243.2.6系统总阻力计算.........................................................................25第四章除尘器和通风机选择.....................................................................274.1除尘器类型..................................................................................274.2除尘器选择..................................................................................274.2.1处理气体量................................................................................284.2.2过滤风速的选取.........................................................................294.2.3过滤面积计算.........................................................................