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本文提出将无烟煤、贫煤直流式燃烧器的燃烧过程划分成着火区、前燃烧区、后燃烧区和燃尽区,并提出前燃烧区存在一个极限燃烧率的概念,根据国内实践经验将前燃区的极限燃烧率定为35～50%。从而,除限制着火区的风量外,着火后在前燃烧区只能配以35～50%的风量(包括着火区的风量).本文总结了各种配风的作用,并提出了控制着火区、前燃烧区、后燃烧区及燃尽区风量的措施以及控制各种配风与煤粉火炬混合的方法。
In this paper, the combustion process of anthracite and lean coal direct current burner is divided into the ignition zone, the front combustion zone, the post combustion zone and the burnout zone, and the concept of a limit burning rate exists in the front combustion zone. According to the domestic practical experience, Burning zone set the limit of combustion rate of 35 to 50%. Thus, in addition to limiting the amount of air in the fire area, after the fire in the pre-combustion zone can only be allocated with 35 to 50% of the air volume (including the fire area of the air volume.) This paper summarizes the role of various air distribution and proposed control of the fire area , The pre-combustion zone, the post-combustion zone and the burnout zone air volume control measures and various gas distribution and pulverized coal torch mixing method.