Device and method for combustion of fuel

An apparatus for burning a liquid fuel said apparatus comprising:

• a fuel-ejection means comprising a plurality of liquid fuel-spraying pipes (25a) each having a liquid fuel-spraying opening (26a) for radially spraying fuel in a fuel-election direction, each of plurality of liquid fuel-spraying opening (26a) being positioned on a first circumference having a center point (31);
• an outer primary air-ejection pipe (23) positioned outside and about the first circumference and having a plurality of outer primary air-ejection openings (24) therein through which primary air is ejected in parallel to the fuel-ejection direction from the liquid fuel-spraying openings (26a), wherein the air-ejection openings (24) are positioned on a second circumference positioned to extend about the first circumference;
• and
• an inner primary air-ejection pipe (27) positioned inside the first circumference and having a least one inner primary air-ejection opening (28) through which primary air is ejected in parallel to the fuel-ejection direction from the liquid fuel-spraying openings (26a), wherein the at least one inner primary air-ejection opening (28) is positioned on a third circumference extending within the first circumference;
• wherein the second and third circumferences are positioned concentrically with the first circumference with each having a center point being the center point (31) of the first circumference on which the plurality of liquid fuel-spraying openings (26a) are positioned.