LOCAL IMPROVEMENT OF AIR AND FUEL MIXING IN BURNERS SUPPLIED WITH SWIRLERS WITH BLADE ENDS CROSSED AT OUTER AREA Russian patent published in 2017 - IPC F23D14/46 F23R3/14 

FIELD: power industry.

SUBSTANCE: burner (1), having a substantially annular air supply and premixing channel (4) in the cross-section for air and fuel during operation, which is formed with external enclosure (5) and the bushing (6), in which a plurality of swirler blades are installed (7), extending from the bushing (6) to the external enclosure (5) in radial direction and having a guiding surface, characterized in that only in the radial outer area of the swirler blades (7), the outflow angle (α) relative to the main flow direction at the end of the outflow of the guide surface in radial direction is increased at least once and decreased once. On the radially inner end of the outflow of the guide surface, the outflow angle (α₁) lies between the outflow angle (α₃) of the end of the outflow, located radially from the outside, and the outflow angle (α₂) of the end of the outflow, located between them. The outflow angles (α) of the neighboring swirler blades (7) have different radial directions. The swirler blades (7) are at least partially formed as hollow blades with outlet holes (8) for fuel.

EFFECT: improvement of air and fuel mixing quality.

5 cl, 4 dwg