| 摘要 |
The burner is designed for combustion of one or more fuels, particularly gas, oil or coal, and comprises an outer primary air pipe (3), an inner primary air pipe (2) arranged in the outer primary air pipe, a secondary air pipe (4) arranged coaxially with the other primary air pipe and surrounding it for supply of combustion air to the burner tip (10), a tertiary air pipe (5) arranged coaxially with and surrounding the secondary air pipe (4), and a flame-stabilizing member (9) for establishing an ignition zone for the flame. The said member (9) is positioned on the inner primary air pipe (2) and provides an ignition zone where the ignition takes place from the core of the flame instead of from the outer rim, as is the case in conventional burners. This results in a more complete combustion, as the coal particles near the core ignite first and achieve a better combustion compared with conventional burners. Furthermore this provides an axial velocity profile in the primary pipe which is favourable at combustion of low-reactive fuels.
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