FUEL DISTRIBUTION DEVICE FOR FUEL FEED DUCTS, AND METHOD OF OPERATING THE DISTRIBUTION DEVICE

摘要

A fuel distribution device for fuel feed ducts, comprising a branching point in a fuel feed duct for feeding a mixed fluid of solid fuel and carrier gas to one or more burners installed in the wall surface of a furnace, a plurality of branch ducts branching off from the branching point and having the corresponding burners connected thereto, and a damper disposed in the fuel feed duct on the upstream side of the branching point and capable of changing the angle of inclination with respect to the direction of flow of the mixed fluid in such a manner as to cause the solid fuel concentrations in the mixed fluid fed to the branch ducts to deviate from each other. The angle of inclination of the damper is adjusted to increase the solid fuel concentration of the mixed fluid in a particular burner. The burner having a high solid fuel concentration fed thereto ensures ignition stability and stabilized combustibility of ignited flames during low loading.