| 摘要 |
PURPOSE:To enable the stable feed of a combustion furnace by a method wherein at a V-shape part formed with a lowering duct and s rising duct for circulating ash collected by a separator, a fluidized air amount is regulated by means of a manifold and a porous ceramic filter. CONSTITUTION:A passage through which circulating ash 17 is recirculated from a separator and a vertical duct 14 to the interior of a combustion furnace 2 is formed with a duct 21 connected to a vertical duct 14 connected to the lower part of a separator, and ducts 22 and 23. Approximately V-shape is formed with a lowering duct 21 and a rising duct 22, and a storage part 24 for the circulating ash 17 is formed with the ducts. A porous ceramic filter 25 extending in the longitudinal direction and the direction of the width of the ducts 21 and 22 is mounted, a plurality of division manifolds 26 are mounted to the outer surface of the lower part of each of the ducts 21 and 22, and an air feed pipe 28 is coupled thereto through dampers 27. When air is fed to the air feed pipe 28, air flows through the fine pores of the ceramic filter 25 to the storage part 24, a fluidized air amount is regulated by means of the damper 27, and the stable feed of the circulating ash 17 can take place. |
