气相法聚乙烯工艺静电产生及控制  

Generation and control of static in gas-phase polyethylene reactor

作　　者：宋伊梦 张云龙 刘正家 苏锋 郭亚民 张永海[1] Song Yimeng;Zhang Yunong;Liu Zhengjia;Su Feng;Guo Yamin;Zhang Yonghai(CNPC Dushanzi Petrochemical Company,Karamay 833699,China)

机构地区：[1]中国石油天然气股份有限公司独山子石化分公司,新疆克拉玛依833699

出　　处：《合成树脂及塑料》2024年第1期52-56,共5页China Synthetic Resin and Plastics

摘　　要：气相法聚乙烯装置运行中,静电造成的反应器内结片是导致反应器停车的最主要原因。通过分析树脂颗粒性质、流化床操作参数、系统内杂质水平、原辅材料输送带电等影响静电产生的主要因素,围绕降低流化床主体电荷量的途径,结合理论和实际生产经验,提出反应器器壁沉积光滑涂层、开车期间彻底置换反应器并进行床层预处理、进入冷凝态运行、控制系统内杂质水平、控制反应器运行参数稳定、外加介质抑制静电等控制手段,减少了静电造成的反应器内结片、结块,有利于装置的长周期运行。The main reason of reactor shutdown is the agglomeration caused by static during the industrial production in gas-phase polyethylene plant.The main factors that affect the generation of static electricity were analyzed,including the properties of resin particles,fluidized bed operating parameters,impurities in the system,and electrification of raw and auxiliary materials during transportation.The ways to reduce the charge amount in the fluidized bed were combined with theoretical and practical production experience to propose the control methods which include forming a smooth coating on the inside surface of the reactor,thoroughly displacing the reactor and pre-treating the bed during start-ups,operating in condensed mode,controlling the concentration of the impurities,operating the reactor under stable process parameters,and adding continuous additives.The methods reduce the agglomeration caused by static in the reactor,which is beneficial for the long-term operation of the plant.

关 键 词：气相法聚乙烯工艺 反应器静电 结片 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]