不同粒径锌粉尘爆炸特性研究  

Study on Explosion Characteristics of Zinc Powder Dust with Different Particle Sizes

作　　者：杨瑞霞 于秋 Yang Ruixia;Yu Qiu(School of Resources,Environment and Materials,Guangxi University,Guangxi,530004)

机构地区：[1]广西大学资源环境与材料学院,广西530004

出　　处：《当代化工研究》2022年第11期21-23,共3页Modern Chemical Research

摘　　要：为研究锌粉尘爆炸特性,采用特殊条件下气体/粉尘爆炸参数实验装置,对三种粒径分别为0.1μm、1μm和10μm的锌粉尘进行粉尘爆炸特性实验研究。结果表明,在环境温度为20~25℃,相对湿度为50%~60%的条件下,粒径为0.1μm、1μm和10μm的锌粉尘爆炸下限分别为250~500g/m^(3)、500~1000g/m^(3)和500~1000g/m^(3)。粉尘最大爆炸压力随质量浓度的增大呈先增后减的趋势,分别为0.847MPa、0.503MPa和0.488MPa,对应的质量浓度为4000g/m^(3)、4500g/m^(3)和5500g/m^(3)。在相同质量浓度下,爆炸压力和爆炸指数随粒径增大而减小,粒径为0.1μm、1μm和10μm锌粉尘的最大爆炸指数分别为17.92MPa·m·s^(-1)、13.03MPa·m·s^(-1)、12.21MPa·m·s^(-1),粉尘爆炸危险性均为St1级。In order to study the explosion characteristics of zinc dust,the gas/dust explosion parameter experimental device under special con-ditions is used to study the effect of zinc powder with the diameters of 0.1μm、1μm and 10μm.The result shows:In the condition of temperature of 20~25℃and humidity of 50%~60%,the minimum explosion concentrations of 0.1μm、1μm and 10μm zinc dust are 250~500g/m^(3)、500~1000g/m^(3)and 500~1000g/m^(3).The maximum explosion pressure increases first and then decreases with the increase of dust concentration.The maximum explosion pressure 0.847MPa、0.563MPa and 0.488MPa,the corresponding concentrations are 4000g/m^(3)、4500g/m^(3)and 5500g/m^(3).In the same concentration,the explosion pressure and explosion index increase first and then decrease with different particle size.The maximum explosion in-dex of 0.1μm、1μm and 10μm are 17.92MPa·m·s^(-1)、13.03MPa·m·s^(-1)、12.21MPa·m·s^(-1),the explosion risk class of zinc dusts are all St1.

关 键 词：锌粉尘 爆炸下限 最大爆炸压力 爆炸指数 

分 类 号：X932[环境科学与工程—安全科学]