一、引言自从1875年意大利都灵一家磨粉厂发生粉尘爆炸以来,世界各地的粉尘爆炸事故屡有发生。近几十年来,面粉、巧克力粉尘、糖粉尘、粮食粉尘的爆炸事故不断,其中尤以粮食筒仓的粉尘爆炸为最甚。随着农业的发展和人口集中于城市、粮食储运业发展很快,粮食筒仓越来越多,储量越来越大,筒仓的利用率也不断提高。但是,粉尘爆炸事故也大有上升的趋 I. Introduction Since the dust explosion in a mill in Turin, Italy, in 1875, dust explosions around the world have occurred frequently. In recent decades, the explosions of flour, chocolate dust, sugar dust and grain dust have been continuously occurring, especially the dust explosion of grain silos. With the development of agriculture and the concentration of population in the cities, the grain storage and transportation industry is developing rapidly with more and more grain silos, more and more reserves, and ever-increasing utilization of silos. However, the dust explosion accident is also on the rise