Patent ID: 7445445

Claim:
A burner comprising: a swirl generator for a combustion airflow having a conical swirl chamber and means for admitting fuel into the combustion airflow, the swirl generator including combustion air inlet openings for the combustion airflow tangentially entering into the conical swirl chamber, and wherein the means for admitting fuel into the combustion airflow comprises a first fuel feeding means, a second fuel feeding means, and a series of fuel outlet openings substantially disposed in the direction of the burner axis along the combustion air inlet openings configured and arranged to inject a fuel into the stream of air when entering the swirl chamber though said air inlet openings, the series of fuel outlet openings being subdivided at least into a first group and a second group of fuel outlet openings, said first group of outlet openings being supplied with a first fuel by the first fuel feeding means, and said second group of fuel outlet openings being supplied with a second fuel by the second fuel feeding means independently from the first fuel feeding means; a burner lance along a burner axis with a round outer contour projecting from the side of the swirl chamber with the smallest swirl chamber cross section into the swirl chamber over at least 50% of the axial length of the swirl chamber; and wherein the means for admitting fuel into the combustion airflow further comprises at least one fuel outlet opening within the burner lance though which liquid fuel is dischargeable along the burner axis.