| 摘要 |
<p>PURPOSE:To prevent choking of a catalyst with soot and dust and prevent lowering of denitriding efficiency and the increase of incurring of a pressure loss by a method wherein after soot and dust contained in exhaust gas from an internal combustion engine are removed by a soot and dust removing means, the exhaust gas is introduced in a denitriding device to remove NOx by using a catalyst. CONSTITUTION:Soot and dust and exhaust gas to be treated containing NOx discharged from an internal combustion engine, for example, a diesel engine 1 are first fed through a line 3 to a soot and dust removing means 6 to remove soot and dust. The exhaust gas is then introduced through a line 105 to a denitriding device 106, where NOx is removed. Consecutively, the exhaust gas is fed through a line 5 to the turbine 8 of a supercharger 7 and after the turbine is run thereby, the exhaust gas is lead through a line 9 and an exhaust gas economizer 11 out to a chimney 12. Meanwhile, combustion air is fed through a line 14 to a blower 13 rotationally driven by the turbine 8 of a supercharger 7. After air delivered from the blower 13 is introduced through a line 15 to a cooler 16 and cooled thereby, the air is fed through a line 17 to a diesel engine 1.</p> |
