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煤粉炉是将磨得很细的煤粉用空气送入炉膛,在悬浮状态下着火燃烧。由于煤粉与空气的接触面积大,致使燃烧强化,煤粉燃烧比较完全,因而煤粉炉的效率较高。大、中型燃烧固体燃料的火力发电厂,几乎无一例外地采用煤粉炉;对工业规模较大的锅炉房,煤粉炉也有所采用。鉴于煤的特性不同,各炉要求煤粉细度也不一样,另一方面,粉碎会使电耗增加,而且煤粉愈细,愈易自燃,在贮存、输送过程中极易发生爆炸。关于固体燃料按爆炸危险性大小进行分类的方法,国外也很少见研究。因此在设计
Pulverized coal pulverized coal is very fine pulverized coal with air into the furnace, burning in the suspension state of fire. As coal and air contact area, resulting in enhanced combustion, relatively complete combustion of pulverized coal, pulverized coal and therefore higher efficiency. Large and medium-sized coal-fired thermal power plant, almost invariably used pulverized coal furnace; for large-scale industrial boiler room, pulverized coal was also used. In view of the different characteristics of coal, the furnace requires fineness of coal is not the same, on the other hand, the crushing will increase the power consumption, and the finer the coal, the more likely to spontaneous combustion, storage, transportation is extremely explosive. On the classification of solid fuels according to the size of the explosion risk, very few overseas studies. So in design