| 摘要 |
PROBLEM TO BE SOLVED: To increase the exhaust heat recovery percentage, and perform a highly efficient heating by arranging a fuel feeding pipe on a burner central axis, arranging an air passage on the outside of the fuel feeding pipe, setting a swirler on the burner tile side of the air passage, and concentrically setting an air heat storage body which is constituted into a hollow cylindrical shape, with the fuel feeding pipe, in a wind box. SOLUTION: A fuel feeding pipe 1 is arranged on a burner central axis through a wind box 2, and an air passage 3 is arranged on the outer periphery of the fuel feeding pipe 1. On the front side of the wind box 2, a burner tile 4 is provided, and the burner tile 4 has a cylindrical tapered-out arc surface 5 the same as one for a normal flat frame burner. Also, no the burner tile 4 side of the air passage 3, a swirler 6 is set, and one the tip end side of the fuel feeding pipe, a flame holder 7 is provided. In the wind box 2, an air heat storage body 8 which is constituted into a hollow cylindrical shape is concentrically set with the fuel feeding pipe 1. The air heat storage body 8 has air permeability between the inside and the outside of the hollow cylindrical shape. |
