OIL BURNING LOW NOx BURNER

摘要

PROBLEM TO BE SOLVED: To provide a burner capable of effectively reducing NOx without increasing CO and soot in a combustion burner in which a face having an exhaust port opened long along a central axis of a furnace occupies 60% or more of a furnace cylindrical face. SOLUTION: In this burner comprising a spray nozzle 4 for spraying fuel toward the furnace, an inner cylinder 1 receiving a tip side of the spray nozzle, and an outer cylinder 2 disposed at an outer peripheral side of the inner cylinder, and further provided with a plurality of air nozzles 8 on a downstream end face 3 of the outer cylinder in a state of extending to a downstream side, the primary air is 10% or less of the total combustion air, and the air nozzle has an opening area of 50-110 mm2per 1 litter of fuel oil, and has the polygonal shape such that a face of the air nozzle at a furnace wall face side is directed to an inner side at an angle of 5-30°to the furnace central axis, a face at a central axis side is directed to an outer side at an angle of 0-5°, and its length L is 15 mm