硫磺粉尘燃爆危险性研究  

Study on sulphur dust explosive hazard

作　　者：王振刚[1,2] 张帆[1,2] 赵琳[1,2] 霍明甲[2] 

机构地区：[1]青岛科技大学,山东青岛266042 [2]中石化青岛安全工程研究院

出　　处：《无机盐工业》2015年第2期56-59,共4页Inorganic Chemicals Industry

摘　　要：为预防硫磺粉尘的燃爆危险性,测试了硫磺的自燃温度、自热特性、热稳定性、最小点火能、爆炸下限质量浓度、爆炸压力和爆炸指数,根据实验结果对硫磺粉尘危险性做了分级。结果表明,随着粒径的减小,硫磺粉尘的自燃温度、最小点火能和爆炸下限质量浓度相应降低,爆炸压力和爆炸指数则升高;70μm以下粒径的硫磺粉尘的自燃温度(AIT)为220℃,最小点火能(MIE)为0.14 m J,爆炸下限质量浓度(MEC)为17.5 g/m3,最大爆炸压力(pmax)为1.15 MPa,最大爆炸指数(Kmax)为39.87 MPa·m/s,因此燃爆危险性最高;450μm以下粒径的硫磺粉尘爆炸危险性等级均为St3级。For the purpose of preventing sulphur dust explosive risk, the autoignition temperature （ AIT ）, self-heating properties, thermal stability,minimum ignition energy （MIE）, minimum explosion concentration （MEC）, explosion pressure, and explosion index of sulphur dust were tested.The risk degree of explosion was graded based on the experimental data.Results showed that with the decrease of the particle size,the autoignition temperature,minimum ignition energy,and minimum explosion concentration of sulphur dust decreased, but the explosion pressure and explosion index increased ;the explosive hazard of sulphur dust with particle size under 70 μm was the most dangerous ,because its autoignition temperature was 220 ℃ ,minimum ignition energy was 0.14 m J, and minimum explosion concentration was 17.5 g/m3.Furthermore ,the maximum explosion pressure reached 1.15 MPa and the dust explosion index peaked 39.87 MPa·m/s.The explosion risk levels of sulphur dusts with particle size above 375 μm were all St3.

关 键 词：硫磺 自燃温度 最小点火能 爆炸下限 爆炸指数 

分 类 号：TQ125.11[化学工程—无机化工]