LDPE稀相输送系统中弯头的磨损与选型对产品质量的影响  

Effects of Wear and Selections of Elbows in LDPE Dilute Phase Conveying Systems on Product Qualities

作　　者：高翔 苟荣恒 杜振国 张箭飞 闫帅 张金龙 易奇 陈鹏 王丹 GAO Xiang;GOU Rongheng;DU Zhenguo;ZHANG Jianfei;YAN Shuai;ZHANG Jinlong;YI Qi;CHEN Peng;WANG Dan(China National Energy Group Xinjiang Chemical Co.,Ltd.,Urumqi 831400,China)

机构地区：[1]国家能源集团新疆化工有限公司,新疆乌鲁木齐831400

出　　处：《塑料工业》2024年第7期112-118,共7页China Plastics Industry

摘　　要：低密度聚乙烯(LDPE)装置气力输送系统常采用稀相输送,物料在输送管路中以“悬浮式”前进,该输送方法具有易于维护、适用范围广、经济性高、流速快等特点。但正是因为输送速度快,物料在较长的输送管路上摩擦,容易导致物料损失和输送设备的磨损。一方面,输送时高速流动的粒子与管壁、弯头相互摩擦、碰撞,产生细粉和丝团料。另一方面高速运动的粒子持续撞击和摩擦输送管道,导致输送管道磨损和寿命变短。因此,本文通过工程实践采用对比分析的方法从聚乙烯颗粒稀相输送的磨损机理和输送弯头的选型两个方面展开探讨,总结和分析了输送弯头选型对LDPE颗粒产品质量的影响,为同类装置稀相输送系统弯头选型提供一定的理论支持。The low density polyethylene(LDPE)pneumatic conveying system often adopts dilute phase conveying,and the materials move in a suspended manner in the conveying pipelines.This conveying method has the characteristics of easy maintenance,wide applicability,high economy,and fast flow rate.Because of the fast conveying speeds,the material frictions on longer conveying pipelines could easily lead to the material losses and the wear of conveying equipment.On the one hand,high-speed particles during transportation rub and collide with pipe walls and elbows,producing fine powders and silk pellets.On the other hand,high-speed particles continuously collide and rub against the conveying pipelines,leading to the wear and shortened service life of conveying pipelines.Therefore,this article adopted a comparative analysis method through the engineering practices to explore the wear mechanisms of dilute phase conveying of polyethylene particles and the selections of conveying elbows.The effects of conveying elbow selections on the quality of LDPE particle products were summarized and analyzed,providing theoretical supports for the elbow selections in the similar dilute phase conveying systems.

关 键 词：低密度聚乙烯 稀相输送 弯头 产品质量 

分 类 号：TQ320.5[化学工程—合成树脂塑料工业]