| 摘要 |
PROBLEM TO BE SOLVED: To provide a burner for pulverized coal blowing combustion which is good in combustibility, is capable of blowing a large mount of pulverized coal, is high in the oxygen ratio of the pulverized coal and can reduce the consumption of gaseous oxygen. SOLUTION: This nozzle is provided with an in-furnace observation hole 1' and a plurality of pulverized coal blowing nozzles 2 and tuyere end temperature regulating gas nozzles 3 lined up concentrically on the outer side thereof and is provided with a plurality of gaseous oxygen nozzles 4 on the concentric circle. At least either of the tuyere end temperature regulating gas nozzles and the gaseous oxygen nozzles are composed of circular pipes. The pulverized coal blowing nozzles and the gaseous oxygen nozzles are positioned with the intersection points of the injection direction of the cylindrical pulverized coal fluid injected from the pulverized coal blowing nozzles and the injection direction of the gaseous oxygen in the position nearer the inner side direction of the furnace than the inside surface front end P of the tuyeres disposed at the forward front end of the pulverized coal burners. |
