低密度聚乙烯生产过程中粘壁现象产生的原因及对策

由德国BASELL公司提供的管式法低密度聚乙烯生产工艺;在中国内地已建成并投产数套,在生产过程中,每套装置都出现过粘壁现象。兰州石化公司20万吨/年高压低密度聚乙烯装置(LDPE)自开工以来,曾出现了数次反应粘壁的现象,使装置的小时平均产量比设计值低3-7吨(根据生产牌号)。通过对反应粘壁的深入分析及多次的经验摸索,总结出了一套相应的对策,最大限度的降低了粘壁产生的几率,保证了装置的正常运行。

Analysis of the Reasons for Fouling of the Reactor During LDPE Production and Countermeasures to Minimize the Possibility of Fouling

Several LDPE plants which use the Basell tubular technology have been built and put into production in China.During the start-up or normal production,every plant has experienced fouling of the reactor,which makes the decrease of capacity of the plant lower than the design capacity by 3 to 7 tons.Through the analysis of the reasons for fouling of the reactor form different aspects,and on the basis of experience obtained form many years of work in LDPE plant,we work out a series of countermeasures to minimize the possibility of fouling and ensure the stable running of the LDPE plant.