气相流化床聚乙烯工艺乙烯单耗高的原因及调控措施  

Reasons and Control Measures for High Ethylene Consumption in Gas-phase Fluidized Bed Polyethylene Process

作　　者：尚鹏 Shang Peng(CHN Energy Baotou Coal Chemical Co.,Ltd.,Baotou Inner Mongolia 014000,China)

机构地区：[1]国能包头煤化工有限责任公司,内蒙古包头014000

出　　处：《山西化工》2024年第12期183-186,共4页Shanxi Chemical Industry

摘　　要：气相流化床聚乙烯生产工艺以聚合级乙烯为主要原料,聚合级1-丁烯或1-己烯为共聚单体,氢气作为分子量调节剂,通过高效催化剂在温度85~110℃和压力约2MPa条件下进行操作,通过造粒系统成型。该工艺生产线性低密度聚乙烯由于其主链上存在着支链,降低了聚乙烯的结晶度,与高密度聚乙烯相比拥有更好韧性,其与低密度聚乙烯相比,刚性、抗撕裂强度、拉升强度都比较好,主要的应用领域在注塑、吹膜等方面。本文主要讲了气相流化床聚乙烯工艺乙烯单耗高的原因,通过工艺调控达到降低乙烯单耗的目的,既能达到节能减排、环保要求,又能提高经济效益。The production process of gas-phase fluidized bed polyethylene mainly uses polymer grade ethylene as the main raw material,polymer grade 1-butene or 1-hexene as the comonomer,hydrogen as the molecular weight regulator,and operates under the conditions of temperature of 85~110℃and pressure of about 2 MPa through efficient catalysts.It is formed by a granulation system.This process produces linear low-density polyethylene due to the presence of side chains on its main chain,which reduces the crystallinity of the polyethylene.Compared with high-density polyethylene,it has better toughness.Compared with low-density polyethylene,it has better rigidity,tear resistance,and tensile strength.Its main application areas are injection molding,blown film,etc.This article mainly discusses the reasons for the high ethylene consumption in the gas-phase fluidized bed polyethylene process.By adjusting the process,the goal of reducing ethylene consumption can be achieved,which not only meets the requirements of energy conservation,emission reduction,and environmental protection,but also improves economic benefits.

关 键 词：乙烯单耗 产品出料系统 催化剂 循环气在线色谱 膜回收 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]