Patent ID: 6389998
Filing Date: 2002-05-21
Classification: F23C,F23D,F23G

Abstract:
An apparatus for burning a liquid fuel, comprising: a powder fuel-ejection means comprising a powder fuel-ejection pipe (25) having an annular ejection opening (26) for ejecting a powder fuel together with air for conveying the powder fuel;an outer primary air-ejection pipe (23) arranged on an outer side of the fuel-ejection means and having a plurality of outer primary air-ejection openings (24) through which primary air is ejected in parallel to a fuel-ejection direction of the fuel-ejection means; an inner primary air-ejection pipe (27) arranged on an inner side of the fuel-ejection means and having a plurality of inner primary air-ejection openings (28) through which primary air is ejected in parallel to the powder fuel-ejection direction of the fuel-ejection means; and a liquid fuel-ejecting means arranged on the inner side of the inner primary air ejection pipes (27) and comprising at least one liquid fuel-spraying pipe (39) having a liquid fuel-spraying opening (38) through which a liquid fuel is radially sprayed, wherein the plurality of outer primary air ejection openings (24) of the outer primary air-ejection pipe (23) and the plurality of inner primary air-ejection openings (28) of the inner primary air-ejection pipe (27) are respectively arranged on outer and inner concentric circumferences between which the annular ejection opening (26) of the powder fuel-ejection pipe (25) is located, and the inner primary air-ejection openings (28) are positioned apart from straight lines extending through center points of the outer primary air-ejection openings (24) and the center point of the concentric circumferences.