| 摘要 |
PURPOSE:To suppress variation in assembly and prevent abnormal heating of the drum and also flame interference by providing means to pass the secondary air on the burner side of an air control plate that connects with the combustion section and the drum and fixes them and providing a circulating area of the secondary air on the drum side of the air control plate. CONSTITUTION:An air control plate 10 is bent in L-shape to provide two steps, and its lower section has screw holes 8, holes 11 and 12 corresponding to projections 9, air holes 13 on the side close to a burner 1, a circulating section 14 forming a circulating area on the side close to a drum 5, and its upper section has a plurality of holes 15 pierced through it to be fixed on the drum 5. A nozzle holder 3 is fixed with a burner holder 2 and made one body on the air control plate 10 which is placed on both sides by means of the screw holes 8 and the holes 11, and projections 9 and the hole 12. Part of the secondary air through the air holes 13 makes a circulating area in the circulating section 14, making the flow of the secondary air biased to the side of the drum 5, and the flames formed on the burners 1 at both ends of the combustion section are deflected along the flow of this secondary air flow, making larger the distance between the flames formed on the adjacent burners 1 and preventing flame interference.
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