Burner apparatus for pulverized coal.

摘要

A burner comprises a pulverized coal supply pipe (73), a starter oil burner (71) extending within the pulverized coal supply pipe (73) to define therebetween a tubular passage through which a mixture of combustion air and pulverized coal passes into a furnace (11), a flame holder provided at an outer periphery of one end of the pulverized coal supply pipe (73) facing to the furnace (11), a cylindrical member (74) disposed in the tubular passage for dividing a part thereof into two coaxial passage parts (731,732), and a valve (75) adapted to close an axial end opening of the cylindrical member for varying a concentration of pulverized coal in a radial outer passage part (731) of the coaxial passage parts.