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    • 4. 发明申请
    • Exhaust Gas Purification Apparatus
    • 废气净化装置
    • US20070243115A1
    • 2007-10-18
    • US11574072
    • 2005-08-22
    • Ichiro TsumagariTakatoshi FurukawaYoshihide TakenakaKoichi MachidaShinya Sato
    • Ichiro TsumagariTakatoshi FurukawaYoshihide TakenakaKoichi MachidaShinya Sato
    • F01N3/00
    • F01N3/035B01D53/9431B01D2251/2067B01D2259/818F01N3/0814F01N3/206Y02T10/24
    • Excessive generation NO2 by oxidation catalyst arrangement upstream of a selective reduction catalyst is suppressed to prevent falling of NOx reduction rate. A selective reduction catalyst 4 capable of selectively reacting NOx with ammonia even in the presence of oxygen is incorporated in an exhaust pipe 3 from an engine 1. A pair of oxidation catalysts 5A and 5B are arranged in parallel with each other and upstream of the selective reduction catalyst. In an operation condition with low exhaust temperature, amounts of the exhaust gas 2 distributed to the oxidation catalysts 5A and 5B are adjusted so as to make NO/NO2 ratio in the exhaust gas 2 to about 1-1.5. In an operation condition with higher exhaust temperature where the NOx reduction rate is less affected by the NO/NO2 ratio, as a countermeasure against increasing, leaking ammonia, passage changeover is conducted to pass the exhaust gas 2 in backflow through the selective reduction catalyst 4 and the oxidation catalysts 5A and 5B, so that ammonia passing through the selective reduction catalyst 4 without reacted is oxidized in the oxidation catalysts 5A and 5B.
    • 通过选择性还原催化剂上游的氧化催化剂配置过量产生NO 2 2被抑制,以防止NO x降低率下降。 即使在有氧的情况下也能够使NO x选择性地与氨反应的选择还原催化剂4从发动机1中引入排气管3中。 一对氧化催化剂5A和5B在选择还原催化剂的彼此并排并排配置。 在排气温度低的运转条件下,分配到氧化催化剂5A和5B的废气2的量被调整为使废气2中的NO / NO 2比率达到约 1-1.5。 在NO x NO 2比率较小的NO x NO 2还原率较小的排气温度较高的运行条件下,作为增加氨泄漏的对策,通过转换 通过选择还原催化剂4和氧化催化剂5A和BB使废气2回流通过,使得在氧化催化剂5A和5B中氧气通过选择还原催化剂4而没有反应的氨被氧化。
    • 5. 发明申请
    • Exhaust gas purifier
    • 废气净化器
    • US20070017371A1
    • 2007-01-25
    • US10558705
    • 2004-06-02
    • Takatoshi FurukawaYoshihide TakenakaKoichi Machida
    • Takatoshi FurukawaYoshihide TakenakaKoichi Machida
    • B03C3/49
    • B03C3/363B03C3/366B03C3/49B03C2201/30F01N3/01Y02T10/20Y10S55/10Y10S55/30Y10S55/38
    • Arranged within a cylindrical housing 1 are capturing cells 2 each including a cylindrical outer electrode 7 capable of capturing particulates and an inner electrode 6 inserted into the outer electrode and lined at its outer surface with a dielectric 5. Exhaust divergent means 3 is arrange on an end of the housing 1 so as to guide exhaust G to interiors in the respective capturing cells 2; exhaust convergence means 4 is arranged on the other end of the housing 1 so as to communicate with a gap 14 between an inner surface of the housing and outer surfaces of the outer electrodes 7 in the respective cells 2. The inner and outer electrodes 6 and 7 are connected to an electric discharge controller 15. Thus, provided is an exhaust emission control device with high removal efficiency of particulates and with easiness in maintenance.
    • 在圆筒形壳体1内布置有捕获单元2,每个单元包括能够捕获微粒的圆柱形外部电极7和插入到外部电极中的内部电极6,并且在其外表面上用电介质5排列。 排气扩散装置3布置在壳体1的端部上,以将排气G引导到各个捕获单元2中的内部; 排气收敛装置4布置在壳体1的另一端上,以与壳体的内表面和各电池单元2中的外电极7的外表面之间的间隙14连通。 内电极6和外电极7连接到放电控制器15.因此,提供了具有高的微粒去除效率和易于维护的排气排放控制装置。
    • 9. 发明授权
    • Exhaust gas purification apparatus
    • 废气净化装置
    • US07765800B2
    • 2010-08-03
    • US11574072
    • 2005-08-22
    • Ichiro TsumagariTakatoshi FurukawaYoshihide TakenakaKoichi MachidaShinya Sato
    • Ichiro TsumagariTakatoshi FurukawaYoshihide TakenakaKoichi MachidaShinya Sato
    • F01N3/10
    • F01N3/035B01D53/9431B01D2251/2067B01D2259/818F01N3/0814F01N3/206Y02T10/24
    • Excessive generation NO2 by oxidation catalyst arrangement upstream of a selective reduction catalyst is suppressed to prevent falling of NOx reduction rate.A selective reduction catalyst 4 capable of selectively reacting NOx with ammonia even in the presence of oxygen is incorporated in an exhaust pipe 3 from an engine 1. A pair of oxidation catalysts 5A and 5B are arranged in parallel with each other and upstream of the selective reduction catalyst. In an operation condition with low exhaust temperature, amounts of the exhaust gas 2 distributed to the oxidation catalysts 5A and 5B are adjusted so as to make NO/NO2 ratio in the exhaust gas 2 to about 1-1.5. In an operation condition with higher exhaust temperature where the NOx reduction rate is less affected by the NO/NO2 ratio, as a countermeasure against increasing, leaking ammonia, passage changeover is conducted to pass the exhaust gas 2 in backflow through the selective reduction catalyst 4 and the oxidation catalysts 5A and 5B, so that ammonia passing through the selective reduction catalyst 4 without reacted is oxidized in the oxidation catalysts 5A and 5B.
    • 通过选择还原型催化剂上游的氧化催化剂配置产生的过量的NO 2被抑制,以防止NO x还原率下降。 即使在有氧的情况下也能够选择性地使NOx与氨反应的选择还原催化剂4从发动机1引入到排气管3中。一对氧化催化剂5A和5B彼此平行配置,并且在选择性 还原催化剂。 在排气温度低的运转条件下,分配到氧化催化剂5A,5B的废气2的量被调整为使废气2中的NO / NO2比例为约1-1.5。 在NO x NO 2比率较小的NOx还原率较高的排气温度的作业条件下,作为增加氨泄漏的对策,进行通过转换使废气2回流通过选择还原催化剂4 和氧化催化剂5A和5B,使得通过选择还原催化剂4而没有反应的氨在氧化催化剂5A和5B中被氧化。