年产六万吨聚苯乙烯聚合工段工艺设计.docxVIP

PAGE \* ROMAN PAGE \* ROMAN II 河南城建学院本科毕业设计 设计说明 设计说明 可发性聚苯乙烯（Expandable PolyStyrene，简称 EPS）通称聚苯乙烯和苯乙烯系共聚物，是一种树脂与物理性发泡剂和其它添加剂的混合物。最常见的可发性聚苯乙烯是含有作为发泡剂的戊烷的透明 PS 粒料。 本设计为年产 6 万吨可发性聚苯乙烯聚合工段工艺设计，反应机理是自由基聚合，采用悬浮聚合工艺，以苯乙烯为单体，水做悬浮介质，采用低温悬浮聚合一步法生产工艺。此方法是将苯乙烯单体、引发剂、分散剂、水、发泡剂和其他助剂一起加入反应釜内 ,聚合后得含发泡剂的树脂颗粒,经洗涤、离心分离和干燥,制得可发性聚苯乙烯珠粒产品；针对聚合反应釜进行了物料衡算、热量衡算，在此基础上通过分析工艺流程，选择出了工艺设备并计算，绘制了带控制点的流程图、并编制了设计说明书和计算书。 关键词：可发性聚苯乙烯 悬浮聚合 物料衡算 工艺设计 河南城建学院本科毕业设计 Design notes Design notes Expandable Polystyrene (Expandable PolyStyrene, referred to as EPS) commonly known as the Department of polystyrene and styrene copolymer is a kind of mixture with resin the physical blowing agent and other additives mixture. The most common is to be made of polystyrene with n-pentane as a blowing agent aggregates of transparent PS. The design is about of polystyrene polymerization process section that the annual production capacity is 60,000 tons, The reaction mechanism is free radical polymerization, suspension polymerization process used styrene as monomer, water suspension medium done using one-step production of low-temperature suspension polymerization process. This method is adding styrene monomer, initiator, dispersing agent, water, blowing agent and other auxiliaries to reactor, the polymer containing a foaming agent, after the resin particles by washing, centrifugal separation and drying, the system may be made of polystyrene beads products; mainly contrapose the polymerization reactor carried out for material balance, heat balance, in this based on the analysis process to select out of the process equipment and calculate and draw the flow chart with control points. And the preparation of the design specifications and calculations of the book. Key Words：Expandable PolyStyrene Suspension Technique Craft calculation Technological design 河南城建学院本科毕业设计目录 河南城建学院本科毕业设计 目录 i i 目 录 1 绪论 1.. 1.1 概述1 1.1.1聚苯乙烯简介1 1.1.2聚苯乙烯的基本物性1 1.1.3国内外的现状及发展前景2... 1.2 设计依据2 1.3 指导思想2 1.4 厂址的选择3 1.5 节能与环境保护3 1.5.1节能3 1.5.2环境保护