改张伟日-毕业计1.docVIP

学 号：201143200402 毕业论文 设计题目：年产6万吨聚甲醛工厂的初步设计 学生姓名：张伟日 专业班级：11化专4班 学院系部：迁安学院化工与环境系 指导教师：白娣斯 2014年05月20日 .本文章主要简单明要的介绍了聚甲醛的特性、生产工艺及广泛用途；分析了我国聚甲醛的生产现状、生产企业及发展前景；并对未来聚甲醛的发展提出建议。在世界上聚甲醛是非常重要的材料，具有优越的金属性能，广泛应用于各行各业。 关键词： 三聚甲醛； 二氧戊环； 共聚甲醛； 工艺流程； 反应器 Abstract Abstract:Polyoxymethylene(POM) is the third largest engineering plastic, which is widely applied in many fields because of its superior performances. In this paper, productiontechnology of copolyoxymethylene(co-POM) was introduced by comparing production technology and characteristicsof acetal homopolymer and co-POM. The process includes formaldehyde unit, trioxymethylene(TOX)unit,dioxolame(DOX) unit and polymerization unit.Molybdenum catalyst is used in the formaldehyde unit. During polymerization,TOX and DOX are used as reactive monomers , boron trifluoride is used as catalyst，co-POM is synthesized under the conditions of 150 ℃and 0.01 MPa. The polymer reactor is a horizontal vessel with multi-axial screwmachine, which is made by 304 stainless steel.This paper introduced the characterristics,production process and wide application of POM briefly ;also the production enterprises and development prospects in our country were analyzed .Finally ,some suggestions for the develpoment of the POM industry were put forward.Polyoxymethylene(POM) is the most important engineering plastic, which is widely applied in many fields because of its superior performances. Key words:Trioxane; Dioxolane; Co-POM; Technological process; Reactor 目 录 摘 要 I Abstract II 第1章 绪论 1 1.1 聚甲醛的现状 1 1.1.1 聚甲醛在国外的发展状况 1 1.1.2 聚甲醛在国内的发展状况 2 1.1.3 聚甲醛的性质及用途 4 1.2 聚甲醛的市场需求 7 1.3.三聚甲醛法制取聚甲醛综述 10 1.3.1均聚甲醛 10 1.3.2共聚甲醛 11 1.4本章小结 12 1.5本章小结 13 第2章聚甲醛的工艺生产流程 13 2.1生产方法的确定 13 2.1.1国内生产情况 13 2.1.2 方法的确定 14 2.2 工艺流程的叙述 14 2.2.1 甲醛工艺 15 2.2.2TOX工艺 16 2.2.3 POX工艺 16 2.3 其余工艺 16 2.3.1 聚合工艺 17 2.3.2 研磨钝化单元 17 2.3.3 脱除单体单元 17 2.3.4掺混单元 17 2.3.5POM工艺 17 2.4 工艺控制 18 2.4.1POM工艺的控制 18 2.4.2 关键设备 19 2.5本