爆燃现象及一起爆燃事故的调查

Deflagration Phenomenon and Accident Site Investigation

我国北方部分农村地区冬季火炉引火仍存在使用汽油等易燃类助燃剂的问题,一旦使用不当极易造成汽油挥发泄漏,形成爆炸性气体环境,引发爆燃甚至爆炸。爆燃作为特殊的燃烧现象,调查难度较大,极容易与爆炸混淆。从爆燃现象入手,辨析了爆燃与爆炸、爆轰的关联,分析了爆燃机理,归纳了可燃易燃液体(气体)挥发(泄漏)量的估算方法,给出了现场调查工作的思路和重点勘验的关键痕迹物证,对提升爆燃类事故调查工作和改进农村火炉引(助)燃物具有重要意义。

There is still the problem of using gasoline and other combustible accelerants to ignite furnaces in some rural areas of north China in winter.Once used improperly,it will easily cause gasoline volatilization and leakage,form explosive gas environment,and cause explosion or even explosion.As a special combustion phenomenon,deflagration is difficult to investigate and is easily confused with explosion.In this paper,the relationship between deflagration,explosion and detonation is analyzed,the deflagration mechanism is analyzed,and the estimation method of volatile (leakage) amount of flammable liquid (gas) is induced,the idea of on-site investigation and the key trace material evidence are given,which is of great significance to the investigation of deflagration accidents and the improvement of the guiding (supporting) fuel of rural furnaces.