浅析改进脱挥布流设计形式在聚苯乙烯生产的作用  

The Effect of Improved Devolatilization Flow Design in Polystyrene Production is Analyzed

作　　者：王伯廷 Wang Boting(Rastar Environmental Protection Materials Co.,Ltd.,Shantou 515041,China)

机构地区：[1]星辉环保材料股份有限公司,广东汕头515041

出　　处：《广东化工》2023年第19期72-74,共3页Guangdong Chemical Industry

摘　　要：聚苯乙烯所采用的连续本体法最终聚合转化率一般控制在80%左右,再通过真空脱挥去除未反应的苯乙烯单体及少量降低聚合物粘度的溶剂等进行冷凝回收利用并得到高纯度的聚苯乙烯。脱挥工段是将反应釜输送过来的物料进行真空环境下的提纯,基本原理就是加热物料到脱挥温度,利用苯乙烯、乙苯和低分子不完全反应物料的低沸点,在脱挥器中使其蒸发,从而留下高纯度的高分子聚合物,其中聚合物流体经过预热后通过布流方式进入脱挥器后,其布流设计合理与否是获得较好的脱挥效果的关键因素之一,本文针对脱挥布流系统分析提出了优化的布流设计并在实际生产中取得了较好效果。The final polymerization conversion rate of polystyrene by continuous bulk method is generally controlled at about 80%,and then through the devolatilization to remove the unreacted styrene monomer and a few of solvent that reduces the viscosity of the polymer and condensation recovery,obtain high purity polystyrene.The devolatilization section is to purify the materials from the reactor in a vacuum environment.The basic principle is to heat the materials to the devolatilization temperature,the low boiling point of styrene,ethylbenzene and low molecular incomplete reaction materials be evaporated in the devolatilizer,thus leaving high purity polymer.After the polymer fluid is preheated,it enters the devolatilizer through the flow distribution method.Whether the distribution design is one of the key factors to obtain a better devolatilization effect.This paper puts forward an optimized distribution design based on the analysis of the devolatilization flow system and has achieved a good effect in actual production.

关 键 词：聚苯乙烯 脱挥 布流 表面积 聚合物 

分 类 号：TQ[化学工程]