| 摘要 |
PURPOSE:To reduce a content of NOx in an exhaust gas by supplying a gaseous NOx reducing agent mixed with a combustion air previously in a fluidized-bed combustion chamber. CONSTITUTION:An air flow amount signal (a) generated from an air flow amount arithmetic unit 21 through an air flow amount detecting part 13 is changed, when a flow amount of combustion air supplied in an air duct 12 by a forcing fan 11 is increased or decreased. An anmonia suction amount setting signal (b) generated from an anmonia flow amount arithmetic unit 22 is changed, when an air flow amount signal (a) from the air flow amount arithmetic unit is changed, therewith an opening grade of an anmonia flow amount control valve is adjusted and changed by an anmonia suction amount regurator 23. Thereby, a reduction reaction of NOx is promoted, a denitration efficiency is improved by NOx reducing agent, and NOx content in an exhaust gas can be reduced. |
