摘要
基于高压聚乙烯(LDPE)聚合条件苛刻,伴随着较大的失控分解和燃爆风险这一现状,对LDPE的聚合过程及失控分解模型进行了详细介绍,重点对乙烯分解综合模型、LDPE产品分子量分布模型、乙烯分解CFD模型的计算验证以及反应器内部热点的识别模型进行了探讨,并进行了总结和展望。模型研究加强了对LDPE合成过程中乙烯燃爆风险的边界分析,提高了局部热点预测能力和风险识别能力,为我国LDPE的工业安全生产提供借鉴。
Based on the harsh polymerization conditions of high pressure polyethylene(LDPE)and the high risk of uncontrolled decomposition and explosion,the polymerization process and uncontrolled decomposition model of LDPE were introduced in detail.The comprehensive model of ethylene decomposition,the molecular weight distribution model of LDPE products,the calculation and verification of the CFD model of ethylene decomposition and the identification model of hot spots inside the reactor were discussed,and the prospects were summarized.The model study strengthens the boundary analysis of ethylene explosion risk during LDPE synthesis,improves the local hot spot prediction ability and risk identification ability,and provides reference for the industrial safety production of LDPE in China.
作者
张智琛
Zhang Zhichen(State Key Laboratory of Chemical Safety,Shandong,Qingdao,266104;SINOPEC Research Institute of Safety Engineering Co.,Ltd.,Shandong,Qingdao,266104)
出处
《安全、健康和环境》
2023年第10期61-69,共9页
Safety Health & Environment
关键词
高压聚乙烯
乙烯聚合
CFD模型
局部热点
失控分解
high pressure polyethylene
ethylene polymerization
CFD modeling
local hot spots
runaway decomposition
