| 摘要 |
PURPOSE:To make the flow velocity of an exhaust gas uniform and to make the injection of NH3 uniform by providing a gas rectifier to a flue in a front or rear flow side near to an NHapprox.=3 injection apparatus. CONSTITUTION:A rectifier 5 used with a material having resistance such as a steel pipe and a net is provided to a front flow side and/or a rear flow side near to an NH3 injection nozzle 2. The flow velocity of an exhaust gas fed from a gas generation source 1 is made uniform with the rectifier 5 and the NH3 concn. is made uniform by injecting NH3 through the nozzle 2 to the uniformed place. NH3 made to the uniform concn. is sent to a denitration apparatus 4 and efficiently allowed to react with NOx. |
