FIELD: power industry.
SUBSTANCE: burner with burner head includes mixing tube (3) for pre-mixing of air and fuel; at that, pilot burner system is provided in lower part of mixing tube (3); besides, pilot burner system includes annular mixing cavity (10) with inlet for auxiliary air and for fuel for pilot burner and with outlet nozzles (7), mixing cavity (10) is equipped at least with two swirling blades (18) located near each outlet nozzle (7). Swirling blades (18) at least almost fully cutout the height of mixing cavity (10) relative to axial direction of outlet nozzles (7). Swirling blades (18) are located as pairs of swirling blades (18). One swirling blade (18) of pair of swirling blades (18) is located on outer part, and the second swirling blade (18) is located on inner part of mixing cavity (10) if to see in radial burner direction. Swirling blades (18) are fully integrated with tip (1) of burner. Burner head includes tip (1), intermediate ring (2) and mixing tube (3), which are assembled with each other in order to form the burner head. In circumferential direction of intermediate ring (2) there located are air inlet holes (15) connected to air channels (14). On outlet end of each air channel (14) there located is one or more reflecting holes (16) and reflecting holes (16) open to mixing cavity (10). Outlet nozzle (7) has round or conical or elliptical cross section.
EFFECT: invention allows preventing the flame propagation against the flow direction.
12 cl, 6 dwg
