前言燃烧器的型式按照其出口气流的特点,可分为直流和旋流两大类。前者常以四角布置、气流在炉内形成切圆流动而相互引燃;后者则以气流本身造成的高温烟气回流来稳定燃烧。实践证明,这两类燃烧器对于不同煤种以及气体、液体燃料都是适用的。本文仅介绍目前在大、中型锅炉上常见的直流式煤粉燃烧器的气流特点及设计计算的原则方法。 Foreword Burner type in accordance with the characteristics of its outlet airflow can be divided into two categories DC and cyclone. The former is often arranged in four corners. The airflow forms a tangential flow in the furnace and ignites each other. The latter stabilizes the combustion with the high-temperature flue gas backflow caused by the airflow itself. Practice has proved that these two types of burners for different coal and gas, liquid fuel are applicable. This article only introduces the current characteristics and design and calculation principle of DC pulverized coal burners commonly found on large and medium-sized boilers.