燃气成分的变化将引起燃气燃烧特性的改变，燃具热负荷、一次空气系数、火焰结构及燃烧稳定性发生变化。分析了当燃气成分发生变化时，配有大气式燃烧器的民用燃具在不加任何调整的情况下，其运行工况的变化规律，这对燃气互换性和燃具适应性的研究以及燃具的设计均有实际意义 Changes in the gas composition will cause changes in the combustion characteristics of the gas, changes in the thermal load of the burner, primary air coefficient, flame structure and combustion stability. Analyzed the changes in the operating conditions of civil burning appliances equipped with atmospheric burners without any adjustment when the gas composition changes, which is a study of gas interchangeability and gas appliance adaptability. The design of burning appliances has practical significance