| 摘要 |
PURPOSE:To enable a pressure between window boxes to be always kept uniformly even if an amount of air is varied in response to a variation of load of a boiler by a method wherein a uniform pressure pipe for connecting a pair of window boxes is formed with a nozzle with a nozzle hole to be communicated with a medium extracting pipe. CONSTITUTION:A fluidized-bed boiler is provided with a uniform pressure pipe 11 for connecting each of a pair of window boxes 4 and 5 is provided, and the uniform pressure pipe 11 is formed with a nozzle hole 12 communicated with a medium extracting pipe 8. Air for fluidized bed may enter four pairs of window boxes 4 and 5 by an air blower 6. At this time, a pressure between a pair of right and left window boxes 4 and 5 becomes equal by the uniform pressure pipe 11. Even in case that a load within the boiler is varied and an amount of air fed from each of the window boxes 4 and 5 into the fluidized bed, pressure within a pair of right and left window boxes 4 and 5 become equal without having any relation with a variation of pressure loss. Air is injected into the medium extracting pipe 8 through the nozzle hole 12 of the uniform pressure pipe 11 to enable it to act ss an air nozzle and so an extraction of medium can be activated. |
