| 摘要 |
<p>PURPOSE:To facilitate to get a low NOx and a combustion of a low not-yet burned component by a method wherein fuel is blown into gas containing NOx to ignite the fuel, the generated incomplete combustion gas is contacted with a catalyst of Ni system and thereafter the fuel and air are added to perform a complete combustion. CONSTITUTION:Nox contained in the exhaust gas discharged from a Diesel engine or a gas turbine or the like is reduced within a reducing atmosphere. In compensation for it, intermediate products such as NH3 and HCN or the like is produced. Reducing combustion gas 114 having the intermediate product such as NH3, HCN or the like generated in this way is fed to a catalyst chamber 117. Catalyst 118 is a metal of Ni system such as a stainless steel. Reducing combustion gas 114 passes in the catalyst 118, and when the combustion gas contacts the catalyst, NH3 and HCN contained in it are decomposed and cut down. A temperature within a catalyst chamber 117 is kept at 900 to 1150 deg.C. Decomposed combustion gas 123 fed while containing the not-yet burned fuel is blown into a hot combustion gas generated under a combustion of the fuel 124 for a boiler, oxygen in an additional air 111 is consumed and its combustion is completed together with the fuel 124 for the boiler.</p> |
