| 摘要 |
PURPOSE:To attain a favourable combustion condition covering a wide load range, by providing plural number of secondary air chambers each of which is provided with an injection nozzle in a crossing direction with a flame on the external circumference of a combustion chamber a part of which is made up of a water cool wall and by making a rate of secondary air supply from each of the chambers vary corresponding to a quantity of combustion. CONSTITUTION:In this combustor of a forced air supply method a part of a wall of a combustion chamber 15 is constituted with a water cool wall which serves as a heat exchanger, and the combustor is constituted by providing plural number of secondary chambers 8 and 9 (two chambers in a sketch) which are independent of each other on the external circumference of the combustion chamber 15 so that the chambers 8 and 9 touch to the water cool wall 16. Air for combustion by means of a fan 1 is supplied to the secondary air chambers 8 and 9 through ducts 3 and 4 diverged from a duct 2 which supplies the air for combustion to a burner body 13 and is spurted out from each of discharge nozzles so that the air crosses a flame to be formed at a flame nozzle. The above ducts 3 and 4 are provided with movable dampers 6 and 7 respectively, and a rate of air supply for combustion from each of the chambers 8 and 9 is made to vary corresponding to a variation of a combustion quantity. |
