Moreover , the system of powdered coal conveying with primary air is the most important tache , whether the distribution of primary air is even or not directly relates to whether the distribution of powdered coal is even or not in all firing implement and nozzles , sequentially directly relates to whether it is hard to take fire , whether the fire is stable , whether there is coking and how about the heat efficiency of the boiler , hi addition , if there is jamming and deflagrate in the system of powdered coal conveying with primary air , severe safety accident can be resulted 良好的煤粉配风是建立合理的炉内空气动力工况和稳定燃烧的必要条件。而其中一次热风送粉系统又是最重要的一个环节，一次风配风是否均匀直接关系到煤粉在各燃烧器和各喷嘴中的分布是否均匀，从而直接关系到着火是否困难、火焰是否稳定、局部是否结焦以及锅炉的热效率高低。若一次风送粉系统发生堵塞和煤粉爆燃则可能引发严重的安全事故。
