Gas micro burner
AssigneeBrown & Williamson Tobacco Corporation
InventorsFrank Kelley St. Charles, Kayyani C. Adiga
Life of this patent
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Abstract
A micro gas burner is provided that generates a stable, pre-mixed flame that produces little to no soot or unburned hydrocarbons. The gas burner includes a fuel inlet, nozzle, oxygenation chamber with at least one air inlet, a mixing chamber having a frustoconical inner wall, at least one permeable barrier and a flame holder. The gas burner thoroughly mixes fuel and entrained air to form a nearly stoichiometric mixture prior to combustion. The gas burner mixes the fuel and air so thoroughly that it requires a lower fuel flow rate than would otherwise be necessary to produce a stable, pre-mixed flame. The gas burner may include an optional flame tube in which a flame is contained and sequestered from diffusing air.
Claims31
A gas burner comprising:
- a nozzle;
- an oxygenation chamber in flow communication with said nozzle;
- at least one air inlet in flow communication with said oxygenation chamber;
- a mixing chamber in flow communication with said oxygenation chamber, said mixing chamber having a frustoconical inner wall;
- and
- a flame holder in flow communication with said mixing chamber, said flame holder having at least one opening therein.
A gas burner comprising:
- a venturi having a nozzle and an oxygenation chamber in flow communication with said nozzle, said oxygenation chamber having at least one air inlet;
- a mixing chamber in flow communication with said oxygenation chamber and having a frustoconical portion of an inner wall that diverges from said oxygenation chamber;
- at least one permeable barrier in flow communication with said mixing chamber and being disposed opposite said oxygenation chamber;
- and
- a flame holder in flow communication with said permeable barrier.
Dependencies are inferred from the claim text.