摘要
研究了淤浆法生产聚乙烯工艺中后续造粒过程及不同操作方式对聚乙烯产品质量的影响,建立了符合工艺特点的造粒机内产品的熔体流动速率预测模型,并用实际生产数据对模型进行优化拟合,得到模型参数。在并联切换和串联切换下,预测模型的产品熔体流动速率计算值和分析值间的平均相对误差分别为8.3%,5.7%。该模型预测了淤浆工艺的最终树脂质量,准确度高于现有文献中提出的造粒后产品质量经验模型,有助于对淤浆聚合工艺的产品质量软测量及牌号切换的研究。
The effects of pelletizing process and operation modes on properties of polyethylene in slurry polymerization process were studied. The mathematical models of melt flow rate of polyethylene in a pelletizer were established according to process characteristics. Furthermore, dynamic production data were used to fit the model parameters. The average relative errors between the model prediction and the practical analysis are 8.3% in parallel operation and 5.7% in serial operation, which indicates that the models proposed are more accurate than those published in the present documents, and that they could be a great help to the soft-sensor design and the optimization of grade transition.
出处
《合成树脂及塑料》
CAS
北大核心
2010年第1期43-47,共5页
China Synthetic Resin and Plastics
基金
国家自然科学基金资助(20409205)
关键词
聚乙烯
淤浆聚合
熔体流动速率
质量模型
造粒机
操作方式
polyethylene
slurry polymerization
melt flow rate
property model
pelletizer
operation mode
