The present invention relates a low fuel concentration low load even ignitability, excellent stability of the flame, at low cost, it is the provision of a solid fuel burner which is excellent in maintainability.
A provided around the burner center axis, a straight conduit 2 having an opening facing the furnace 13, and a bent tube portion 5 continuous to the straight pipe portion 2, and the solid fuel flowing through the curved pipe section 5 a nozzle 9 for injecting a fluid mixture of the carrier gas to the furnace 13 from the opening, the outlet outer periphery flame holder 10 of the nozzle 9, first swirler give turning to mixed fluid in the central axis of the burner side of the straight pipe section 2 6, the first swirler 6 to the mixed fluid downstream of the burner central axis side of the first swirler 6 provided with a second swirler 7 giving the inverse of the turning. The mixed fluid from the curved pipe portion 5, the first swirler 6 is moved from the center in the radial direction to increase the fuel concentration of the nozzle 9 near the inner wall, further pivoting strength by applying a reverse pivoting by the second swirler 7 There can be reduced. Therefore, without increasing the size of the nozzle 9, ignitability is improved by flame holder 10, thereby improving the stability of flame.
.FIELD 1