DIESEL ENGINE EXHAUST GAS TREATMENT APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a diesel engine exhaust emission control device for reducing the size of a cyclone and achieving a high PM collection rate and a low fuel cost.

SOLUTION: A diesel engine exhaust gas treatment apparatus includes a tubular collection part having a discharge electrode 1-2 for charging particulate matters contained in exhaust gas from a diesel engine using fuel having lower quality than heavy oil and a dust collecting electrode for collecting the charged particulate matters, and a cyclone type classifying collection means for classifying and collecting the particulate matters separated from the tubular collection part. In a high-concentration exhaust gas delivery part for the particulate matters, provided near the inner surface on the downstream side of the tubular collection part, a cyclone collection means 2-1 is provided which is constituted by one or more tangential cyclones. This actualizes such a system that a high-concentration exhaust gas flow exhausted from the high-concentration exhaust gas delivery part is selectively introduced into the tangential cyclones 2-1a depending on the flow amount of the exhaust gas.

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