COMBUSTION BURNER AND COMBUSTION DEVICE PROVIDED WITH SAME

摘要

A combustion burner which comprises a mixture nozzle (2) defining a mixed fluid flow passage, through which a mixed fluid (1) containing pulverized coal and air for conveyance flows toward a furnace (4), a secondary air flow passage, through which a secondary air (6) flows, a tertiary air flow passage, through which a tertiary air (9) for combustion flows, both air flow passages being provided to surround the mixture nozzle (2), and an air jet nozzle (24) provided in the neighbourhood of an outer periphery of a tip end of the mixture nozzle (2). Air (21) is jetted through the air jet nozzle (24) to be directed toward a center of the mixture nozzle (2), whereby a high temperature gas near the outer periphery of the tip end of the mixture nozzle (2) is induced into the mixed fluid (1) near the outer periphery of the tip end.