| 摘要 |
PROBLEM TO BE SOLVED: To provide a pulverized coal burner capable of reducing a black zone and adjusting a frame position by a simple control method.SOLUTION: In this pulverized coal burner 100 in which a primary air jetting port 11 at a radial inner side and a secondary air jetting port 31 at a radial outer side of a pulverized coal jetting port 21 disposed along the circumferential direction, are concentrically cylindrically disposed to a central axis O, the primary air jetting port 11 is constituted by disposing a plurality of swirl vanes 13 for swirling and jetting the primary air, between a pair of shield plates 12 conically disposed for jetting the primary air radially outward, and the secondary air jetting port 31 is disposed to jet the secondary air straight or inward. |
