POE溶液聚合反应器内混合与反应过程的CFD研究  

CFD studies on the mixing and reaction in a solution polymerization reactor for POE production

作　　者：麻雪怡 刘克勤[1] 胡激江[1,2] 姚臻[1,2] MA Xueyi;LIU Keqin;HU Jijiang;YAO Zhen(State Key Laboratory of Chemical Engineering,Zhejiang University,Hangzhou 310058,Zhejiang,China;Institute of Polymer and Polymer Engineering,College of Chemical and Biological Engineering,Zhejiang University,Hangzhou 310058,Zhejiang,China)

机构地区：[1]化学工程联合国家重点实验室,浙江大学,浙江杭州310058 [2]浙江大学聚合与聚合物工程研究所,化学工程与生物工程学院,浙江杭州310058

出　　处：《化工学报》2024年第1期322-337,共16页CIESC Journal

基　　金：国家自然科学基金重点项目(21938010)。

摘　　要：聚烯烃弹性体(POE)具有优异的性能而应用广泛,其工业生产通常采用溶液聚合方法。POE反应介质流变行为复杂,受温度、剪切速率、聚合物浓度等诸多因素影响。同时,反应介质的流变行为是决定混合效果的重要因素,进而影响反应进程。由于反应、流变和流场的相互作用,POE溶液聚合反应器的设计和生产过程控制面临着挑战。基于实测的动力学和流变数据,针对POE溶液聚合反应器建立了一个耦合计算流体力学(CFD)模型,综合考虑了流动、混合效率、反应动力学和流变特性等方面的影响,探究了不同工艺条件(搅拌转速、停留时间、进料温度)对速度场、温度场、浓度场、流变特性等参数的影响规律,为优化实际工业过程提供参考。Polyolefin elastomer(POE)has excellent properties and is widely used,and its industrial production usually adopts solution polymerization method.Industrial production of POE typically involves the solution polymerization process.The rheological behavior of the POE reaction medium is highly complex and influenced by several factors,including temperature,shear rate and polymer concentration.Moreover,the rheological behavior of the reaction medium significantly impacts the mixing efficiency,thereby affecting the reaction process.Due to the interaction of reaction,rheology,and flow field,the design and production process control of POE solution polymerization reactors are facing challenges.This study establishes a computational fluid dynamics(CFD)model that integrates flow dynamics,mixing efficiency,reaction kinetics and rheological properties for POE solution polymerization reactors,based on actual measured data for kinetics and rheology.The model enables a detailed investigation of the effects of various process conditions,such as stirring speed,residence time and feed temperature on the velocity field,temperature field,concentration field and rheological properties.The findings of this study provide valuable insights and guidance for optimizing actual industrial processes.

关 键 词：聚烯烃弹性体 反应器 计算流体力学 流变模型 聚合物 动力学模型 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业]