| 摘要 |
An improved exhaust treatment apparatus includes a particulate filter assembly connected to the exhaust system of a diesel engine for removing the solid particulate soot matter entrained in the engine exhaust. The particulate filter assembly includes a disposable low-temperature filter element that can be readily replaced when it becomes clogged. Heat insulated catalyst assemblies located upstream of the particulate filter assembly reduce the amounts of solid particulate matter and other gaseous pollutants in the engine exhaust. A self-cleaning exhaust gas heat exchanger located between the catalyst assemblies and the particulate filter cools the hot, catalyzed exhaust gases before they reach the low temperature filter element. The self-cleaning heat exchanger also includes an intermittent water injection system for periodically removing soot accumulations from the heat exchanger.
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