| 摘要 |
This soot blowing device is equipped with: a cylindrical lance tube (4), the tip of which is provided with a jet nozzle (7) that jets a jet medium; a jet medium supply pipe (3) which is inserted into the inner periphery of the lance tube (4) and supplies the jet medium to the lance tube (4); a drive device (5) which causes the lance tube (4) to move forward and backward in the axial direction of the lance tube (4); and a support roller (6) which supports the lance tube (4) so that the lance tube (4) is capable of moving forward and backward in the axial direction from below the lance tube (4). The lance tube (4) has a tapered portion (30) formed at a portion in the axial direction of the lance tube (4), the tapered portion (30) being formed by causing at least a circumferential portion of the lance tube (4) supported by the support roller (6) to gradually increase in outer diameter from the tip of the lance tube (4) to its base. |
