PULVERIZED COAL/BIOMASS MIXED-COMBUSTION BURNER AND FUEL COMBUSTION METHOD

摘要

Provided is a pulverized coal/biomass mixed-combustion burner capable of combusting large volumes of biomass fuel as an auxiliary fuel, and capable of combusting only pulverized coal if there is insufficient biomass fuel. The pulverized coal/biomass mixed-combustion burner (1) comprises: a biomass fuel jet nozzle (20) that follows the axis of the pulverized coal/biomass mixed-combustion burner (1); a pulverized coal fuel jet nozzle (30) that surrounds the biomass fuel jet nozzle; a secondary air nozzle (40) that surrounds the pulverized coal fuel jet nozzle; and a tertiary air nozzle (50) that surrounds the secondary air jet nozzle. The pulverized coal/biomass mixed-combustion burner is configured so as to jet a biomass fuel flow to the inner side of a pulverized coal fuel flame having good ignition and flame stability and formed inside a furnace.