各地消防杂志多次运用了“超过爆炸浓度极限的混合物不爆但能燃烧”的概念,消防队伍中对这个基础理论问题的认识也很不一致。在此,谈点个人看法,与大家商榷。 可燃气体、液体蒸气与空气混合后遇火种能引起爆炸的浓度范围,称为爆炸范围。每一种可燃物质在空气中的爆炸范围各有一定数值,低于或高于此范围的浓度均不燃不爆。当空气中气体或蒸气的浓度低于爆炸范围的最低浓度时,接触火种不燃不爆,这一最低浓度称为爆炸下限;当空气中该物质的 Fire magazines throughout the country have repeatedly used the concept of “a mixture that does not exceed the explosive concentration limit but can burn.” The understanding among firefighters about this basic theoretical issue is also very inconsistent. Here, talk about personal views, to discuss with you. Combustible gases, liquid vapors and air mixed case of fire can cause the explosion concentration range, known as the explosion range. Each combustible material in the air explosion range has a certain value, below or above this range of concentrations are non-flammable. When the concentration of gas or vapor in the air is lower than the lowest concentration in the explosion range, the contact flame is non-flammable and non-explosive, and this lowest concentration is called the lower explosion limit; when the concentration of the substance