| 摘要 |
PROBLEM TO BE SOLVED: To achieve the flame temperature in flat distribution which is the same as the time when the length of a furnace is long even if the length of the furnace is short, and besides, to burn the fuel completely, and also, to apply a regenerative burner technique to a furnace even if it is short. SOLUTION: Air for combustion under the logical quantity of air is injected into a furnace so that the specific surface area may form a large cross section of a jet as compared with the case where only the same flow is supplied from a right circular throat, and also fuel is injected toward this air jet so that it may mix in the air jet with strong disturbance before the fuel looses its velocity energy. To be concrete, the air throat 13 and a fuel nozzle 11 are arranged so that the nozzle may jet fuel, with the ratio de/Dpcd of the corresponding diameter de of the opening 13a of the air throat 13 to the interval 1/2 Dpcd between the center of the air throat 13 and the center of a fuel nozzle 11 being in the range of 0.1 to 0.5, and the ratio La/de of the corresponding diameter de of the air throat to the distance La from the intersecting point between the jet axis of the fuel and the plane on the center axis in the longitudinal direction of the air throat 13 to the outlet face of the air throat being in the range of 1.0 to 5.0, and more preferably, the air throat 13 should have a flat rectangular opening 13a. |
