| 摘要 |
FIELD: power industry.SUBSTANCE: invention relates to power industry. Reheat burner (1) includes channel (2) with pipe (3), located in channel with possibility of fuel injection in plane (4), perpendicular to longitudinal axis (15) of the channel; the end (14) of pipe (3) is located downstream before high speeds area (16), and swirlers (7) protrude from each of the channels walls; channel (2) has side walls (10) and upper and lower walls (11) and it has rectangular, square or trapezoid section; channel (2) and pipe (3) restrict eddy formation area (6) in direction of hot gases (G) flow before plane (4) of injection, and area (9) of mixing after plane (4) of injection; area (9) of mixing includes high speeds area (16) with constant cross-section and slowdown area (17) with expanding cross-section, this area being located after the previous one in direction of hot gases (G) flow; and burner in high speeds area (16) of area (9) of mixing has smallest cross-section. Width (w) and height (h) of slowdown area (17) increase in direction of burner outlet (19). Inner wall (20) of slowdown area (17) has a protrusion (21), forming a section in which hot gases separate from inner wall (20) in slowdown area. Protrusion (21) is located in a circumferential direction on inner wall (20) of slowdown area. Eddy formation area (6) has at least one section in which its width (w) and height (h) increase in direction of burner outlet (19).EFFECT: invention provides prevention of backflash in burner, reduction of NOand CO atmospheric emissions.6 cl, 8 dwg |
