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    • 7. 发明申请
    • DIESEL PARTICULATE MATTER REDUCTION SYSTEM
    • 柴油颗粒物减少系统
    • WO2006115629A1
    • 2006-11-02
    • PCT/US2006/010161
    • 2006-03-20
    • DONALDSON COMPANY, INC.ZHANG, WenzhongIMES, Julian, A.TAUBERT, Todd, R.RICKE, Timothy, L.ANGELO, Theodore, G.
    • ZHANG, WenzhongIMES, Julian, A.TAUBERT, Todd, R.RICKE, Timothy, L.ANGELO, Theodore, G.
    • F01N3/035B01D53/94F01N3/023
    • F01N3/0231B01D53/9459B01D2255/102B01D2255/50B01D2255/915B01D2258/012F01N3/035F01N13/009F01N13/0093F01N2250/02F01N2330/02F01N2330/12F01N2330/325F01N2330/38F01N2330/42
    • A diesel exhaust treatment system is disclosed that includes first and second diesel particulate reduction devices. The first diesel particulate reduction device is located upstream in the exhaust flow and contains an oxidation catalyst coating. The second particulate reduction device is located downstream from the first particulate reduction device and is generally non-catalyzed or lightly catalyzed. Each particulate reduction device comprises a flow-through fabric-type filtration media with substantial internal turbulence. As exhaust gas passes through the catalyzed upstream particulate reduction device, nitric oxide (NO) is oxidized to form nitrogen dioxide (NO 2 ), a portion of which interacts with the particulate trapped within the upstream diesel particulate reduction device to regenerate the upstream device. A remaining portion of exhaust gas containing NO 2 enters the downstream diesel particulate reduction device, where an additional portion interacts with the trapped particulate to regenerate the device. The relative volume weighted efficiency of the upstream particulate reduction device and of the downstream particulate reduction device are selected to optimize the overall system particle capture efficiency and backpressure, as well as to balance the amount of NO 2 made with the amount of NO 2 consumed so as to minimize NO 2 emissions.
    • 公开了一种包括第一和第二柴油颗粒减少装置的柴油机排气处理系统。 第一柴油颗粒减少装置位于废气流的上游并且包含氧化催化剂涂层。 第二颗粒减少装置位于第一颗粒还原装置的下游,并且通常是非催化的或轻微的催化的。 每个颗粒还原装置包括具有实质内部湍流的流通织物型过滤介质。 当废气通过催化的上游颗粒还原装置时,一氧化氮(NO)被氧化以形成二氧化氮(NO 2 H 2),其一部分与捕获在上游柴油颗粒还原物内的颗粒相互作用 设备重新生成上游设备。 含有NO 2 N 2的排气的剩余部分进入下游柴油颗粒还原装置,其中附加部分与捕获的颗粒相互作用以再生装置。 选择上游颗粒还原装置和下游颗粒还原装置的相对体积加权效率以优化整个系统颗粒捕获效率和背压,以及平衡由下列颗粒还原装置制备的NO 2 2 / 消耗的NO 2量的量以使NO 2排放最小化。