| 摘要 |
PROBLEM TO BE SOLVED: To reduce a heat flow-out from a gap of openings by providing an enlarged part having a winding diameter at a remote part from a furnace core of a water-cooled coil, and arranging the enlarged part so as to reduce a gap between a furnace wall and the coil in a furnace wall opening. SOLUTION: The water-cooled coil 6 is constituted so that a outside of furnace side 6-2 of a part of a farther side from the core has a larger winding diameter than that of the core side surrounding a burner 1. According to this constitution, since an opening gap 5 formed between a furnace wall 2 and the coil 6 is blocked by the side 6-2 of the coil 6 in the state as seen from the core side, the gap 5 is largely reduced. Accordingly, since flow-out of the heat in the furnace from the gap 5 between the coil 6 and the wall 2 can be remarkably reduced, a burning damage of an outdoor structure of the furnace such as a heat insulator can be prevented to prevent damage of an equipment, thereby improving its durability.
|
