废旧塑料回收改性再造粒

本科毕业论文作者：杨成专业：高分子材料与工程指导教师：张军完成日期：2013年6月题目年产1200吨聚丙烯/聚乙烯混合废塑料分离及改性再造粒的生产车间的设计诚信承诺书本人承诺：所呈交的论文是本人在导师指导下进行的研究成果。除了文中特别加以标注和致谢的地方外，论文中不包含其他人已发表或撰写过的研究成果。参与同一工作的其他同志对本研究所做的任何贡献均已在论文中作了明确的说明并表示了谢意。签名：日期：本论文使用授权说明本人完全了解南通大学有关保留、使用学位论文的规定，即：学校有权保留论文及送交论文复印件，允许论文被查阅和借阅；学校可以公布论文的全部或部分内容。（保密的论文在解密后应遵守此规定）学生签名：指导教师签名：日期：南通大学化学化工学院毕业设计I摘要聚乙烯和聚丙烯树脂是应用非常广泛的高分子材料，其各类性能优良。因此在生活中充斥着大量的聚丙烯/聚乙烯的废旧塑料。本文介绍了国内外废旧塑料的回收利用现状，说明了聚乙烯/聚丙烯材料的性能及其应用，聚乙烯/聚丙烯材料的改性方法和挤出造粒工艺的选择。本设计采用聚乙烯/聚丙烯混合废塑料为原料，以密度分离法将其分离，采用填充改性法对其进行改性。设计出一条合理的分离、改性及挤出再造粒生产工艺流程。确定各个工艺参数和设备，以实现聚乙烯/聚丙烯废旧塑料的回收再利用。关键词：聚乙烯/聚丙烯，废旧塑料，挤出造粒，工艺流程南通大学化学化工学院毕业设计IIABSTRACTPolyethyleneandpolypropyleneresinarewidelyusedpolymermaterialswhichhavemanyexcellentproperties.Therefore,muchwastepolypropyleneandpolyethyleneplasticswaseverywhereinregularlife.thecurrentstatusofdomesticwasteplasticsrecyclingutilizationwereintroducedinthispaperbriefly.theperformance,theapplication,themodifiedmethodsandselectionofextrusiongranulationprocesswereillustrated.Thewastepolyethyleneandpolypropyleneplasticsmixtureweretakenasrawmaterialinthisdesign.Thewastepolyethyleneandpolypropyleneplasticswereseparatedbythedensityseparationmethodandmodifiedbyfillingmodificationmethod.Areasonableseparation,modificationandextrusionprocesswasdesigned.Theprocessparametersandequipmentsweredeterminedtorealizetherecyclingofthewastepolyethyleneandpolypropyleneplasticsmixture.Keywords:Polyethylene/polypropylene,wasteplastics,extrusion,process南通大学化学化工学院毕业设计III目录摘要.........................................................................................................................................IABSTRACT................................................................................................................................II第一章绪论.............................................................................................................................11.1项目要求............................................................................................................................11.2聚乙烯/聚丙烯...................................................................................................................11.3聚乙烯/聚丙烯的应用.......................................................................................................11.3.1聚乙烯产品用途......................................................................................................11.3.2聚丙烯产品用途.....................................................................................................21.4废旧塑料回收利用现状....................................................................................................31.4.1国内.........................................................................................................................31.4.2国外.........................................................................................................................4第二章生产工艺及设备参数.....................................................................................................62.1工艺选择............................................................................................................................62.1.1聚乙烯/聚丙烯混合废塑料的分离工艺选择.........................................................62.1.2聚乙烯/聚丙烯改性方法的比较与选择.................................................................82.1.3聚乙烯/聚丙烯的挤出造粒工艺选择..................................................................102.1.4工艺流程图...........................................................................................................112.2设备选型..........................................................................................................................122.2.1设备选型的总体原则...........................................................................................122.2.2挤出造粒设备选择...............................................................................................132.2.3高速混合机选择....................................................................................................142.2.4平板切粒机选择....................................................................................................142.3物料衡算..........................................................................................................................14第三章公用工程.......................................................................................................................163.1耗电..................................................................................................................................163.2排风设备..........................................................................................................................163.3噪音..................................................................................................................................163.4通风设计..........................................................................................................................16南通大学化学化工学院毕业设计IV3.5用水..................................................................................................................................163.6排水