聚丙烯由于其优异的热性能和机械性能,已成为最重要的热塑性产品之一,国内外聚丙烯产能迅速增长。中国石化(SINOPEC)共有35套聚丙烯生产装置,分布在24个炼化生产企业,总生产能力达到404×104t/a,可生产聚丙烯均聚物、共聚物、抗冲共聚物等产品。应用流程模拟技术建立的聚丙烯装置模型,可用于工程师研究聚合物产量和质量与聚合物密度、熔体流动速率、等规度等聚合物属性同各操作条件之间的关系,从而优化操作,特别是聚合反应参数,提高产品产量和质量。探讨了聚丙烯聚合过程反应机理,并应用美国AspenTech公司的Aspen Polymers Plus软件,对聚丙烯聚合过程进行模拟,通过调整聚合反应动力学参数,如活化能和指前因子,模拟每个牌号的熔融指数、等规度、每个活性中心上的产量、数均分子量、重均分子量,模拟误差可控制在4%以内,模型能够准确反映聚合反应动力学机理,应用模型,可以指导聚丙烯装置操作的优化、产品牌号的切换,实现装置节能降耗、挖潜增效。 Polypropylene has become one of the most important thermoplastic products due to its excellent thermal and mechanical properties, and its polypropylene capacity at home and abroad has been rapidly increasing. SINOPEC has a total of 35 polypropylene production plants distributed in 24 refining and chemical enterprises with a total production capacity of 404 × 104t / a, which can produce polypropylene homopolymer, copolymer, impact copolymer and other products. The PP device model established by the flow simulation technology can be used by engineers to study the relation between polymer properties such as polymer yield and quality, polymer density, melt flow rate, isotacticity and other operating conditions with each operating condition to optimize operation, In particular, polymerization parameters, improve product yield and quality. The reaction mechanism of polypropylene polymerization process was discussed. Aspen Polymers Plus software was used to simulate the polymerization process of polypropylene. By adjusting the polymerization kinetic parameters such as activation energy and pre-exponential factor, the melting of each grade Index, and isotacticity. The yield, number average molecular weight, weight average molecular weight, and simulation error of each active site can be controlled within 4%. The model can accurately reflect the polymerization kinetic mechanism and the application model to guide the operation of the polypropylene plant Optimization, switching of product grades, saving energy and reducing consumption of equipment, tapping potential and improving efficiency.