碳酸氢盐抑制乙烯/聚乙烯两相爆炸特性研究  

Investigation on inhibition characteristics of bicarbonate on hybrid explosion of ethylene/polyethylene mixture

作　　者：纪文涛[1,2,3] 徐子晖 毛文哲 杨帅帅 张国涛 王燕 JI Wentao;XU Zihui;MAO Wenzhe;YANG Shuaishuai;ZHANG Guotao;WANG Yan(College of Safety Science and Engineering,Henan Polytechnic University,Jiaozuo Henan 454003,China;Explosion Dynamic Disaster Early Warning and Emergency Engineering Technology Research Center of Henan Province,Jiaozuo Henan 454003,China;Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization,Jiaozuo Henan 454003,China)

机构地区：[1]河南理工大学安全科学与工程学院,河南焦作454003 [2]河南省燃爆动力灾害预警与应急工程技术研究中心,河南焦作454003 [3]煤炭安全生产与清洁利用省部共建协同创新中心,河南焦作454003

出　　处：《中国安全科学学报》2024年第8期138-146,共9页China Safety Science Journal

基　　金：国家自然科学基金资助(52374197);国家重点研发计划(2022YFC3080700);河南省优秀青年科学基金资助(212300410042)。

摘　　要：为防治乙烯/聚乙烯两相体系爆炸危害,选取碳酸氢盐作为抑爆粉体,在20 L球型爆炸装置内开展抑爆试验,探究不同碳酸氢盐对乙烯/聚乙烯两相体系的爆炸抑制效果及机制,并讨论不同碳酸氢盐对两相体系爆炸抑制性能之间的差异性。结果表明:两相体系较单相聚乙烯更难抑制,且随着乙烯体积分数的增加,两相体系爆炸抑制难度增大;碳酸氢盐对不同质量浓度的乙烯/聚乙烯两相体系均具有抑制作用,其抑制效率受乙烯体积分数和碳酸氢盐质量浓度的综合影响;碳酸氢盐均能在聚乙烯爆炸过程中通过物化反应抑制乙烯/聚乙烯两相爆炸,碳酸氢钾的分解吸热性能及其对聚乙烯热解的延缓作用均优于碳酸氢钠,故碳酸氢钾对乙烯/聚乙烯两相体系爆炸的抑制效果优于碳酸氢钠。In order to prevent and control the explosion hazards of ethylene/polyethylene hybrid mixture,bicarbonate was selected as the explosion suppression powder,and the explosion suppression experiment was carried out in a 20 L spherical explosion device to explore the explosion inhibition effect and mechanism of different bicarbonate on ethylene/polyethylene hybrid mixture.The differences of explosion inhibition performance of different bicarbonate on the hybrid mixture were discussed.The results show that the hybrid mixture is more difficult to inhibit than the single-phase polyethylene.With the increase of ethylene concentration,the explosion inhibition of the hybrid mixture becomes more difficult.The bicarbonate has an inhibitory effect on the ethylene/polyethylene hybrid mixture with different concentrations,and the inhibition efficiency is affected by the concentration of ethylene and bicarbonate.Bicarbonate can inhibit the ethylene/polyethylene hybrid explosion through physicochemical reaction during the polyethylene explosion.The decomposition and endothermic properties of potassium bicarbonate and its retardation effect on polyethylene pyrolysis are better than those of sodium bicarbonate,so the inhibition effect of potassium bicarbonate on the explosion of ethylene/polyethylene hybrid mixture is better than that of sodium bicarbonate.

关 键 词：碳酸氢盐 乙烯 聚乙烯 两相体系 抑爆特性 

分 类 号：X937[环境科学与工程—安全科学]