| 摘要 |
PROBLEM TO BE SOLVED: To prevent the reduction of heat exchange efficiency caused by deformation of fins or the increase of abrasion wear at weld zones between the fins and heat-transfer tubes from occurring by limiting an incident angle of a fluid jetted from a lance tube of a soot blower. SOLUTION: A soot blower 18, for inserting a lance tube 16 into a flue 11 having heat-transfer tubes 13 with fins 12 disposed therein and jetting a fluid 17 from the tip end portion of the lance the 16 in directions perpendicular to the axial direction thereof to remove soot adhering to the heat-transfer tubes 13, is configured such that the lance tube 16 in inserted and extracted substantially at right angles to the fins 12 of the heat-transfer tubes 13 and the lance tube 16 can be rotated about an axis along the direction of the insertion and extraction.
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