| 摘要 |
PURPOSE:To unify the quantity of NOX and CO generated, by a mthod wherein, in the titled device provided below a dispersion plate with an air chamber partitioned by the dispersion plate located at the bottom of a fluidized bed, the inside of an air chamber is divided into an air feed chamber with a high oxygen partial pressure and an air feed chamber with a low oxygen partial pressure. CONSTITUTION:In a fluidized bed device 1, a fluidized bed 4 is formed above a dispersion plate 2 located at the bottom thereof, and a heat transfer pipe 5 is installed within the fluidized bed 4. A part below the dispersion plate 2 forms an air chamber 11. In which case, a partition 19 divides the air chamber 11 into an air feed chamber 20 having a high oxygen partial pressure and an feed chamber 21 having a low oxygen partial pressure. Exhaust gas in a flue duct is guided into the air feed chamber 21 through a gas circulating duct 22, and meanwhile, the air passing through a preheater is guided into the air feed chamber 20 through an air duct 10. This suppresses combustion at the center of a furnace through the supply of inactive gas (exhaust gas) from the air feed chamber 21 to the center of the furnace, and reduces the production of NOX by means of CO, HC, etc. generated as a result of pyrolysis of coal. |
