年产六万吨聚苯乙烯聚合工段工艺设计.

河南城建学院本科毕业设计设计说明I设计说明可发性聚苯乙烯（ExpandablePolyStyrene，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DesignnotesIIDesignnotesExpandablePolystyrene(ExpandablePolyStyrene,referredtoasEPS)commonlyknownastheDepartmentofpolystyreneandstyrenecopolymerisakindofmixturewithresinthephysicalblowingagentandotheradditivesmixture.Themostcommonistobemadeofpolystyrenewithn-pentaneasablowingagentaggregatesoftransparentPS.Thedesignisaboutofpolystyrenepolymerizationprocesssectionthattheannualproductioncapacityis60,000tons,Thereactionmechanismisfreeradicalpolymerization,suspensionpolymerizationprocessusedstyreneasmonomer,watersuspensionmediumdoneusingone-stepproductionoflow-temperaturesuspensionpolymerizationprocess.Thismethodisaddingstyrenemonomer,initiator,dispersingagent,water,blowingagentandotherauxiliariestoreactor,thepolymercontainingafoamingagent,aftertheresinparticlesbywashing,centrifugalseparationanddrying,thesystemmaybemadeofpolystyrenebeadsproducts;mainlycontraposethepolymerizationreactorcarriedoutformaterialbalance,heatbalance,inthisbasedontheanalysisprocesstoselectoutoftheprocessequipmentandcalculateanddrawtheflowchartwithcontrolpoints.Andthepreparationofthedesignspecificationsandcalculationsofthebook.KeyWords：ExpandablePolyStyreneSuspensionTechniqueCraftcalculationTechnologicaldesign河南城建学院本科毕业设计目录ii目录1绪论.....................................................11.1概述........................................................................11.1.1聚苯乙烯简介..............................................................11.1.2聚苯乙烯的基本物性........................................................11.1.3国内外的现状及发展前景....................................................21.2设计依据....................................................................21.3指导思想....................................................................21.4厂址的选择..................................................................31.5节能与环境保护..............................................................31.5.1节能......................................................................31.5.2环境保护..................................................................31.6安全防火....................................................................31.6.1消防设施..................................................................31.6.2灭火程序..................................................................42工艺论证..................................................52.1工艺原理....................................................................52.1.1生产方案..................................................................52.1.2工艺路线.................................................................52.1.3工艺流程..................................................................52.1.4反应原理[9]................................................................52.2聚苯乙烯的生产技术..........................................................62.3发泡聚苯乙烯技术工艺比较....................................................62.3.1塔式本体聚合技术..........................................................62.3.2添加少量溶剂的单釜连续本体聚合技术........................................72.3.3苯乙烯的悬浮聚合..........................................................72.3.4苯乙烯种子法悬浮聚合......................................................72.4发泡聚苯乙烯生产工艺........................................................82.4.1一步法聚合工艺............................................................82.4.2二步法聚合工艺............................................................82.4.3一步法工艺与二步法工艺的比较..............................................82.5可发性聚苯乙烯基本性能......................................................92.5.1力学性能..................................................................9河南城建学院本科毕业设计目录iiii2.5.2绝热性能..................................................................92.5.3化学性能..................................................................93聚合工段工艺和生产流程.................................113.1聚合工段工艺过程叙述.......................................................113.2生产流程...................................................................113.3产品规格、原料及公用工程条件...............................................113.3.1产品规格.................................................................113.3.2生产方式及规模...........................................................123.3.3原料.....................................................................123.3.4工艺控制条件.............................................................134物料衡算...............................................154.1计算依据...................................................................154.2聚合工段物料衡算...........................................................154.2.1进料阶段.................................................................154.2.2出料阶段.................................................................165聚合工段