氮气对放置单层金属丝网条件下甲烷爆炸的影响研究  

Study on the Influence of Nitrogen on Methane Explosion under the Condition of Single-Layer Metal Wire Mesh Placement

作　　者：郁佳 翟志 许灵钧 张增亮 Yu Jia;Zhai Zhi;Xu Lingjun;Zhang Zengliang(College of Environmental and Safety Engineering,Qingdao University of Science and Technology,Qingdao 266000,China)

机构地区：[1]青岛科技大学环境与安全工程学院,山东青岛266000

出　　处：《山东化工》2024年第16期227-229,232,共4页Shandong Chemical Industry

摘　　要：为了减少化工生产中甲烷爆炸导致的巨大损失,通过实验研究了放置金属丝网的密闭管道内氮气对甲烷爆炸的影响。通过搭建3 m长的密闭管道,在距离点火源1.9 m处放置10目(孔径:2 mm)、16目(孔径:1.18 mm)、20目(孔径:0.85 mm)、30目(孔径:0.6 mm)的单层金属丝网,对比分析了添加体积分数10%的氮气与未添加氮气对体积分数10%甲烷/空气预混气体的爆炸影响规律。实验结果表明,添加10%的氮气能够有效地降低火焰强度、减小火焰速度、衰减爆炸超压,延缓爆炸达到峰值超压的时间,值得注意的是,添加氮气以及改变金属丝网目数均不会改变最大火焰速度出现的位置。这将为受限空间内的安全设计提供理论参考。In order to reduce the significant losses caused by methane explosions in chemical production,this study experimentally investigated the effect of nitrogen in a closed pipe containing metal wire mesh on methane explosions.By constructing a 3 m long closed pipe,single-layer metal wire mesh with mesh sizes of 10 mesh,16 mesh,20 mesh,and 30 mesh were placed at a distance of 1.9 m from the ignition source to analyze the impact of adding 10%nitrogen on the explosion characteristics of 10%methane/air premixed gas compared to without nitrogen.The experimental results show that adding 10%nitrogen effectively reduces flame intensity,decreases flame speed,attenuates explosion overpressure,delays the time to peak overpressure during the explosion.Importantly,adding nitrogen and changing the mesh size of the metal wire mesh do not alter the position of the maximum flame speed.This study provides theoretical insights for safety design in confined spaces.

关 键 词：甲烷爆炸 预混气体 氮气 金属丝网 

分 类 号：TQ086[化学工程] X932[环境科学与工程—安全科学]