| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a black smoke removing device which effectively rise the temperature, even if the exhaust gas temperature of a diesel engine is low, and surely combusts the black smoke caught by a filter. SOLUTION: A black smoke removing device is provided with a filter which catches black smoke in exhaust gas from a diesel engine 1, a fuel and air spray nozzle which feeds the fuel and the air to exhaust gas before fed to the filter, a catalytic combustion device which is provided between the spray nozzle and the filter and combusts the exhaust gas, and a precombustion device 11 which heats and rises the temperature of the exhaust gas to a prescribed temperature, before the fuel and the air are fed from the spray nozzle, and the precombustion device 11 is formed of a double cylinder of an outer cylinder 26 where the exhaust gas is rotationally introduced and an inner cylinder 25 where a part of the exhaust gas introduced in the outer cylinder is rotationally introduced from a plurality of nozzle holes 27 formed in the circumferential wall part.</p> |
