气相乙烯丙烯共聚及熔体流动指数软测量的研究

Study of Modeling for Gas-Phase Propylene-Ethylene Copolymerization and MI Soft-Sensing

以Hypol工艺为研究对象,根据相平衡、物料平衡和聚合反应动力学,建立了乙烯丙烯共聚反应机理模型。通过聚丙烯生产过程中的丙烯进料、乙烯进料、催化剂进料、反应温度、压力、丙烯分析值、乙烯分析值以及氢气分析值等物理量,实现对聚丙烯的熔体流动指数(MI)的软测量。利用工业现场数据对建立的模型进行验证,针对聚丙烯PP1647牌号的计算结果显示,该模型的预报误差为8.27％,可以用来指导实际生产。

Based on the Hypol process, along with phase equilibrium, material balance and propylene polymerization kinetics, a theoretically - based model of propylene - ethylene co - polymerization was set up to calculate the melt index (MI) of PP. Result of simulation with industrial data showed MI prediction of the model was quite satisfactory. The model can be used to instruct the industrial operation.