As the heat supplier of the spent acid decomposition furnace,the construction approach and combustion performance of the burner poses a significant impact on the safety,environmental performance and stable operation of the spent acid decomposition furnace.The generation mechanism and control measures of nitrogen oxides in burner are examined,and the spent acid decomposition furnace is taken as an example to present the technical prin-ciple,equipment construction and application of super low nitrogen burner,in order to contribute to the environmental protection endeavor.