Burner
AssigneeABB Research Ltd.
InventorsThomas Sattelmayer, Martin Valk
Life of this patent
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Abstract
In a burner (1) for a heat generator, having a throughflow passage (3) for the throughflow of a combustion-air flow (12), a hentral main fuel lance (5) acts inside the said throughflow passage (3). A number of mixing elements (6) are arranged in an annular manner around this main fuel lance (5), and the remaining annular throughflow cross section is covered concentrically hereto by swirl generators. The mixing elements (6) are fed with a fuel (13a) and a partial combustion-air quantity (12a). The mode of operation of these mixing elements (6) corresponds to that of a pilot stage, whereby the flame stability is increased, while the NOx emissions remain at a low level.
Claims7
A burner for a heat generator, comprising:
- an outer wall defining an axially directed throughflow passage for directing a combustion-air flow to an outlet of the burner,
- at least one main fuel lance mounted in the throughflow passage and having a fuel duct with a nozzle at the outlet of the burner,
- a plurality of swirl generator disposed in the throughflow passage in annular manner around the main fuel lance,
- a plurality of mixing elements disposed between swirl generators, which mixing elements are arranged in a circumferential manner around the main fuel lance, each mixing element having at least one mixture passage with a nozzle at the outlet of the burner, and
- means for feeding a fuel and a partial combustion-air quantity into the mixture passages of each mixing element.
Dependencies are inferred from the claim text.