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气力输送装置较其它形式的机械输送具有一系列的优点:如生产率较高、设备构造简单、管理方便、机械化和连续化程度高、省劳力等等。因而气力输送成为输送散装物料的重要方法。气力输送固体物料的有效范围可从粉状到0.5厘米的颗粒状,比重从0.1～3.5克/厘米~3。所以被广泛地应用工业生产的许多方面,而煤的气力输送装置也日益增多。 众所周知,煤是易燃物。煤在气力输送过程中,悬浮的煤尘容易急剧氧化燃烧,同时产生大量的热和出现高压现象,这将要发生煤尘爆炸。如果发生爆炸,必须达到起爆温度,并且煤尘浓度必须在引起爆炸的上、下极限以内。中山浩男的文章较为详尽的论述了关于煤尘爆炸的问题。所以对煤的
Pneumatic conveyors offer a number of advantages over other forms of mechanical conveying: high productivity, simple equipment construction, easy management, high degree of mechanization and continuity, labor saving and more. Therefore, pneumatic conveying has become an important method of conveying bulk materials. The effective range of pneumatic conveying of solid material can be from powder to 0.5 cm granular, the proportion of from 0.1 to 3.5 g / cm ~ 3. Therefore, many aspects of industrial production are widely used, and pneumatic conveying devices for coal are also increasing. It is well known that coal is combustible. Coal in the process of pneumatic conveying, the suspension of coal dust easily oxidized and flamed quickly, while generating a lot of heat and the phenomenon of high pressure, which will happen coal dust explosion. In the event of an explosion, the detonation temperature must be reached and the concentration of dust must be within the upper and lower limits of the explosion. Zhongshan Hao men’s article discusses in more detail on the issue of coal dust explosion. So for coal