Patent ID: 6976440

Claim:
A fuel distributor for a fuel supply duct, comprising a fuel supply duct, which supplies a mixed fluid, comprised in turn of a solid fuel and a carrier gas, to each of one or more burners disposed at walls or corner parts formed by walls of a furnace, a plurality of branch ducts, which branch out from a branching part provided in said fuel supply duct and each of which is connected to a corresponding burner, and a single damper, which is disposed inside the fuel supply duct at an upstream side of the branching part and can be changed in a tilt angle with respect to a direction of a flow of the mixed fluid, wherein a damper pivoting axis, for changing the tilt angle of said damper, is provided near an end part of the damper or a central part of the damper and the damper pivoting axis is disposed at or in the vicinity of a central part of the fuel supply duct with an arrangement by which the following relationship holds for a distance L, from the damper pivoting axis to the branching part in the direction of flow of the mixed fluid, and a diameter D of the fuel supply duct: L/D=0.4 to 2, so that a mutual difference will arise in solid fuel concentrations of the mixed fluid supplied to the respective branch ducts at a part that is located upstream of the branching part, and allowing for maintaining a high concentration of solid fuel toward a specified burner of the one or more burners.