| 摘要 |
<p>PURPOSE:To decrease the rate of nitrogen oxides in combustion gas, by providing a porous framework in the zone of combustion flames, and by burning fuel together with combustion air, on the burner port plate of a burner. CONSTITUTION:A framework 2, which is provided with a number of square or cylindrical ports, consisting of multi-ply thin walls 1, having a honeycomb or checker-like section, is mounted on framework holding metals 4, provided to the inside of a cylindrical burner 3. A flame pattern immediately after ignition is so that the tip of an outside flame does not come into contact with the back surface of a framework 2, and combustion is performed in this state for a while. When the rate of combustion air is increased after the framework 2 is red- heated, combustion is continued with the flame without contacting closely to a burner port plate 6, but being in the lifted up state, so as to enclose the framework 2. With such an arrangement, the generation rate of nitrogen oxides in exhaust gas can be extremely decreased.</p> |
