EXHAUST EMISSION CONTROL DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an exhaust emission control device capable of efficiently purifying noxious component in exhaust gas.

SOLUTION: A heat exchanger 5 is disposed in a first exhaust gas channel 31 which exhaust gas from an engine 1 pass through. The heat exchanger 5 is divided into a high temperature side channel 5a and a low temperature side channel 5b by a bulkhead 5c. Heat is exchanged between the high temperature side channel 5a and the low temperature side channel 5b. Fluid passing through the high temperature side channel 5a is cooled and fluid passing through the low temperature side channel 5b is re-heated. A first exhaust gas channel 31 includes a plasma processing part 4 as a first reaction part. A first catalyst part 6 containing catalyst purifying NOx is disposed at a downstream side of the plasma processing part 4 as a second reaction part inducing next step reaction following the reaction in the first reaction part based on it. An upstream side of the plasma processing part 4 and the high temperature side channel 5a of the heat exchanger 5 are connected to keep flow, and a downstream side of the plasma processing part 4 and an upstream side of the first catalyst part 6 are connected via the low temperature side channel 5b of the heat exchanger 5 to keep flow.

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