1.前言工业炉燃料的选择,应该从经济性和减少公害等观点出发,进行综合性的考虑。工业用液化天然气有如下优点:(1)公害小;(2)便于自动控制;(3)供应稳定。另外,在新建炉子时,可以利用气体燃料的特点,设计高效率炉子。但是,对于实际生产的炉子,由油改换到气体燃料时,由于现有的煤气烧咀火焰辐射率低,估计效率是要降低 1. INTRODUCTION The choice of fuel for industrial furnaces should be comprehensively considered from the viewpoint of economy and pollution reduction. Industrial liquefied natural gas has the following advantages: (1) small pollution; (2) to facilitate automatic control; (3) supply stability. In addition, in the new furnace, you can use the characteristics of gaseous fuels, high-efficiency furnace design. However, for the furnace actually produced, when the oil is changed to gaseous fuel, the estimated ef? Ciency is reduced due to the low emissivity of the existing gas burner