Abstract:

Abstract:The NOx emission concentration of an air preheater is up to 655.7mg/m­­­­­­­³  for the No.6 unit of a certain power plant.In order to meet the emission requirement of new standard,a low NOx combustion retrofit of boiler burners conducted using a multi air stereo staged and horizontal bias coal combustion technology,which carries out a multi air stereo staged combustion along the vertical direction and horizontal direction in the chamber of a stove.The performance test of the retrofitted boiler shows that the retrofit effect is significant with the NOx emission concentration of an air preheater could be kept below 300mg/m­­­­­­­³ for a long time,and the boiler efficiency and combustible matter content in flue dust are also meeting the requirements.

Key words: Keywords:burner, low NOx combustion, NOx, air stereo staged combustion, horizontal bias