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    • 5. 发明申请
    • METHOD FOR PURIFICATION OF AN EXHAUST GAS FROM A DIESEL ENGINE
    • 从柴油发动机净化排气的方法
    • US20090260346A1
    • 2009-10-22
    • US12421947
    • 2009-04-10
    • Ioannis GekasKeld Johansen
    • Ioannis GekasKeld Johansen
    • F01N3/20
    • F01N3/2066F01N3/0253F01N3/035F01N13/0097F01N2610/02F01N2610/03Y02T10/24
    • A method for removing impurities in exhaust gas from a diesel engine, where the impurities comprise nitrogen oxides, carbon monoxide, particulate matter and incompletely combusted hydrocarbons. The method comprises the steps of injection of a reductant comprising urea or ammonia into the exhaust gas from the engine, selective catalytic reduction of the nitrogen oxides in the exhaust gas by the reductant, and intermittent injection of a hydrocarbon into this effluent. The succeeding steps are oxidation of carbon monoxide, particulate matter, incompletely combusted hydrocarbons and injected hydrocarbon to carbon dioxide and water, and in selectively oxidising possible excess of reductant to free nitrogen, and finally filtration of the effluent by passing the gas through a catalysed filter. The remaining particulate matter is retained in the filter, and the carbon monoxide, particulate matter and hydrocarbons are oxidixed to carbon dioxide and water, and the reductant is selectively oxidixed to nitrogen, creating a purified exhaust gas.
    • 一种从柴油发动机中除去废气中的杂质的方法,其中杂质包括氮氧化物,一氧化碳,颗粒物质和不完全燃烧的烃。 该方法包括以下步骤:将来自发动机的废气中含有尿素或氨的还原剂注入,通过还原剂选择性地催化还原废气中的氮氧化物,并将烃间歇地注入该流出物。 后续步骤是将一氧化碳,颗粒物质,不完全燃烧的烃和注入的烃氧化成二氧化碳和水,以及选择性氧化可能过量的还原剂到游离氮,最后通过使气体通过催化过滤器过滤流出物 。 剩余的颗粒物质保留在过滤器中,一氧化碳,颗粒物质和烃类被氧化成二氧化碳和水,还原剂选择性地被氧化成氮气,产生净化的废气。
    • 8. 发明授权
    • Method and system for purification of exhaust gas from diesel engines
    • 柴油发动机废气净化方法及系统
    • US08127535B2
    • 2012-03-06
    • US12342924
    • 2008-12-23
    • Jesper NorskKeld JohansenIoannis Gekas
    • Jesper NorskKeld JohansenIoannis Gekas
    • F01N3/00F01N3/10F28F3/00
    • F01N3/206F01N3/0231F01N3/2066F01N2240/02Y02T10/24
    • The invention provides a method and system for purification of a carbon monoxide, nitrogen oxides, incompletely combusted hydrocarbons and soot containing exhaust gas from a combustion engine comprising the steps of catalytically oxidizing the carbon monoxide in the exhaust gas, retaining soot and remaining amounts of hydrocarbons in the oxidised exhaust gas in a filter, addition of a reducing agent to gas and catalytically reducing nitrogen oxides, and obtaining a purified exhaust gas. The invention further comprises the steps of controlling a temperature in the oxidising catalyst by passing at least a part of the gas from the engine through a first side of a heat exchanger, and passing at least a part of the purified exhaust gas through a second side of the heat exchanger, and leading the remaining amount of the gas from the engine through a by-pass across the first side of the heat exchanger and leading the remaining amount of the purified exhaust gas through a by-pass across the second side of the heat exchanger.
    • 本发明提供一种用于净化来自内燃机的一氧化碳,氮氧化物,不完全燃烧的烃和含有废气的烟炱的方法和系统,包括以下步骤:催化氧化废气中的一氧化碳,保留烟灰和剩余量的烃 在过滤器中的氧化废气中,向气体中加入还原剂并催化还原氮氧化物,并获得纯化的废气。 本发明还包括以下步骤:通过使来自发动机的至少一部分气体通过热交换器的第一侧来控制氧化催化剂中的温度,并使纯化废气的至少一部分通过第二侧 并且引导来自发动机的剩余量的气体经过热交换器的第一侧的旁路,并导致净化废气的剩余量穿过第二侧的旁路 热交换器。