聚乙烯配方设计及模拟.pdfVIP

聚乙烯配方设计及模拟 摘 要 聚乙烯 （PE ）是通用合成树脂中产量最大的品种，主要包括低密度聚乙烯 （LDPE ）、线型低密度聚乙烯 （LLDPE ）、高密度聚乙烯 （HDPE ）及一些具有 特殊性能的产品。其特点是价格便宜，性能较好，可广泛应用于工业、农业、包装 及日常生活中，在塑料工业中占有举足轻重的地位。 本文首先对聚乙烯进行了全面的介绍，从目前的发展现状、国内外的研究现 状、生产工艺的进展到催化剂研究的新进展，再到Aspen Plus 化工模拟软件的介 绍。接下来进行了低密度聚乙烯聚合工艺的Aspen 流程模拟，并运用其Polymer 模块中的灵敏度分析功能对分子量及产量的影响因素进行了探索分析。最后，根 据Aspen 流程模拟所得到的数据对本工艺进行了物料衡算和热量衡算，并进行了 釜体的设计和其工艺装配图的绘制，检验其在实际中的可应用性。 本次设计与模拟的意义在于，通过对低密度聚乙烯聚合工艺流程的模拟与理 论学习，更加深入地理解了低密度聚乙烯聚合过程中分子量分布及产量的影响因 素，熟悉了釜体结构，也学会了应用Aspen 化工模拟软件，这些都为以后的工作 与实践奠定了良好的基础。 关键词：低密度聚乙烯、流程模拟、分子量、影响因素、灵敏度分析 I 聚乙烯配方设计及模拟 Abstract PE is the most products in the current synthetic resin. It mainly includes LDPE, LLDPE, HDPE and some products with special characters. It has a lot of advantages, such as low price, good capability, can be widely used in industry, agriculture, packaging and our daily life and, it plays an important role in the plastic industry. The main of present design first introduced the polyethylene fully, from the current status of polyethylene to the status of research on LDPE in domesticity and abroad. At the same time, the processes of LDPE and the new catalyst is mentioned. Aspen Plus, popular chemical technology simulation software in the world was also introduced. After These, the simulation of ethylene bulk polymerization process was finished, and then I the studied how those factors in the polymerization workshop section lead to the affection trend in the polystyrene yield by the sensitivity analysis in the polymer model of Aspen. At last, the material calculation and thermal calculation are done which base on the data of the simulation and the polymerization kettle technical assem