Method for igniting a burner
AssigneeAga AB
InventorMats Gartz
Life of this patent
Estimating the term…
Abstract
A method for igniting a fuel/oxidant mixture in an industrial furnace. At least one fuel supply conduit and at least one oxidant supply conduit is provided, each conduit having an opening that opens on a side of the burner head that faces the furnace interior space. Fuel and oxidant are supplied to the burner head, and a light detector for detecting ultraviolet light, or other light wavelengths, is provided for detecting light that indicates the presence of a flame. A laser is positioned to emit a laser beam onto a point on the burner head adjacent the conduit outlets and to heat that point to a temperature exceeding the ignition temperature of the fuel/oxidant mixture. When the burner has ignited, the detector emits a signal to a control circuit that extinguishes the laser beam.
Claims6
A method for igniting a burner in an industrial furnace, said method comprising the steps of:
- supplying fuel and oxidant to a burner head including at least one conduit for the supply of fuel and at least one conduit for the supply of oxidant, wherein the conduits extend to respective conduit outlets at a burner head outer surface that faces a furnace interior space;
- directing a laser beam onto a point on the burner head adjacent to the conduit outlets to heat the point to a temperature that exceeds the ignition temperature of a fuel/oxidant mixture;
- detecting the existence of a flame by a light detector;
- emitting a signal from the light detector to a control circuit when the fuel/oxidant mixture has been ignited and a flame is detected by the light detector;
- and providing a signal from the control circuit to turn off the laser beam after a flame is detected.
Dependencies are inferred from the claim text.