| 摘要 |
PURPOSE:To effect combustion efficiently even in case of solid fuel having and burning by a method wherein solid gas mixture, ascending inner space of a tower in the upper portion of the fluidized-bed, is induced so as to flow to a lower direction by air current injected at high speed toward the lower direction, rough particles accompanied by gas are returned into the fluidized-bed, at the same time, the flow velocity of the gas at the inner space of the tower is reduced and the fine particles only are accompanied with the gases. CONSTITUTION:In the fluidized-bed combustion furnace 1 utilizing two stage combustion method, a primary combustion chamber 3 is provided on the fluidized-bed 2 and the tower space portion 2a of directly above the fluidized-bed, a secondary chamber 4, having a secondary air supplying port 5 and a combustion gas exhaust port 6, is provided on the side part of tower space portion in the primary combustion chamber 3, the secondary air supplying port 5 is arranged at the cieling near the primary combustion chamber 3 so as to be injected the secondary air toward the lower direction. The combustion gas exhaust port 6 is arranged at fan side from the primary combustion chamber 3, the combustion gas, ascending along the inner side of the primary combustion chamber 3, is induced to the secondary chamber 4 so as to change from ascending flow to descending flow by the secondary air current 11 and the secondary combustion may be effected. |
