PULVERIZED COAL FIRING BURNER AND OPERATING METHOD THEREOF

摘要

PURPOSE:To improve the combustion of pulverized coal while reducing the quantity of NOX generated by each mounting baffle plates, inner diameters thereof gradually increase in the direction of injection, to a nose section in the direction of injection of an injection nozzle for secondary air and a nose section in the direction of injection of an injection nozzle for tertiary air. CONSTITUTION:A baffle plate 5 inclining at a predetermined angle in the direction of injection (the axial direction of a secondary-air injection nozzle) of secondary air G2 is arranged to the nose of the injection nozzle 2. Mixing to a mixing flow of pulverized coal at a central section and primary air G1 is delayed in the greater part of secondary air G2 by the baffle plate 5. A baffle plate 6 inclining at a prescribed angle to the direction of injection (the axial direction of a tertiary-air injection nozzle 3) of tertiary air G3 is disposed to the nose of the injection nozzle 3. Accordingly, the combustibility of pulverized coal is improved while the quantity of NOX generated can be inhibited.