| 摘要 |
<p>Fuel is burned in accordance with a burning method and apparatus in two stages (62,64) and in the presence of first and second oxygen-containing gases, respectively. The second oxygen-containing gas (B) has a higher concentration of oxygen than the first oxygen-containing gas. The fuel stream is burned in a first (62) of the two stages at a first equivalence ratio sufficiently greater than 1.0, so that thermal NOx formation is inhibited, a more heat transfer effective luminous flame is achieved and a combustible mixture comprising unburned and partially oxidised fuel and fuel radicals is are produced for combustion in the second (64) of the two stages. The combustible mixture is burned in the second of the two stages at an equivalence ratio of no greater than about 1.0 so that maximum heat is transferred to the first of the two stages to stabilise combustion therein, and the fuel radicals are sufficiently oxidised by the second oxygen-containing gas to inhibit formation of prompt NOx. <IMAGE></p> |
