Pulverized coal burner for burning fuel supplied in dense phase conveying

摘要

A pulverized coal burner (1) having a fuel delivery pipe (7) and a primary air pipe (9) arranged concentrically therein to form an annular fuel passage cross section or fuel delivery space (13), the primary air pipe (9) being spaced from the burner exit side to form a mixing passage cross section or mixing space (10) Muzzle end of the fuel delivery pipe (7) ends and inside the combustion chamber mouth side end of the fuel delivery tube (7) is a radially inwardly extending, teeth having stabilizing ring (14) is arranged, characterized in that the radial gap height of the fuel delivery cross section or fuel delivery chamber (13) defining radial distance between the outside of the primary air tube (9) and the inside of the fuel delivery tube (7) is about as large as the length with which the teeth of the stabilizing ring (14) radially einw rts extend in the direction of the burner longitudinal axis (3).