| 摘要 |
PROBLEM TO BE SOLVED: To provide a burner that has high durability.SOLUTION: A burner 3 includes a burner body 5 provided by penetrating through an opening part 11 formed in a furnace wall of a combustion furnace, and cooling pipes 7 for cooling the burner body 5 by a cooling medium circulating in the inside. The cooling pipes 7 include: first cooling pipes 7a provided to surround the burner body 5, while coming into contact with the circumference of the burner body 5, from a tip 5a inside the furnace of the burner body 5 toward a furnace wall side; and second cooling pipes 7b provided to surround the burner body 5 along with the first cooling pipes 7a from the vicinity of the opening part 11 to the outside of the furnace, and provided so that a distance r2 from the central axis C of the burner body 5 becomes larger than the first cooling pipes 7a. |
