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    • 3. 发明申请
    • FLUE GAS PURIFYING DEVICE
    • 燃气净化装置
    • US20110252771A1
    • 2011-10-20
    • US13133588
    • 2009-12-08
    • Takashi FujinagaMasazumi TanouraDaishi UenoYasushi Mitsuyama
    • Takashi FujinagaMasazumi TanouraDaishi UenoYasushi Mitsuyama
    • F01N3/10F01N11/00
    • F01N3/208B01D53/90B01D53/9477B01D53/9495B01D2251/2067B01D2255/1021B01D2255/20723B01D2255/50F01N13/0093F01N2560/021F01N2610/02Y02T10/24
    • An object of the present invention is to provide a flue gas purifying device that can suppress leakage of ammonia and can efficiently decrease nitrogen oxides in flue gas. The object is achieved by including: an exhaust pipe that guides flue gas discharged from an internal combustion engine; a urea-water injecting unit that injects urea water into the exhaust pipe; a catalyst unit that includes a urea SCR catalyst that promotes a reaction between ammonia produced from injected urea water and nitrogen oxides and a support mechanism arranged inside of the exhaust pipe on a downstream side to a position where urea water is injected in a flow direction of the flue gas to support the urea SCR catalyst; an ammonia-concentration measuring unit that measures an ammonia concentration in flue gas at a measurement position in a region where the SCR catalyst is arranged; and an injection control unit that controls injection of urea water based on a measurement result acquired by the ammonia-concentration measuring unit.
    • 本发明的目的是提供一种能够抑制氨的泄漏并能够有效地降低烟道气中的氮氧化物的烟道气净化装置。 该目的通过包括:引导从内燃机排出的烟气的排气管; 尿素水喷射单元,其将尿素水喷射到排气管中; 催化剂单元,其包括促进由注入的尿素水和氮氧化物产生的氨之间的反应的尿素SCR催化剂和在排气管的下游侧的排气管的内部的尿素水沿着流动方向喷射的位置的支撑机构 烟气支持尿素SCR催化剂; 测定在SCR催化剂的区域的测定位置的烟气中的氨浓度的氨浓度测定单元, 以及喷射控制单元,其基于由氨浓度测量单元获取的测量结果来控制尿素水的喷射。