Patent ID: 6889619
Filing Date: 2005-05-10
Classification: F23C,F23D

Abstract:
1. A burning method using a solid fuel burner having a fuel nozzle for ejecting a mixed fluid of a solid fuel and a transporting gas, an additional air nozzle for ejecting air into said fuel nozzle in a direction nearly perpendicular to a flow direction of said mixed fluid, said additional air nozzle having an exit arranged at a position in the burner upstream of an exit of said fuel nozzle, and at least one outer-side air nozzle for ejecting air, said outer-side air nozzle being arranged outside of said fuel nozzle, said method comprising: increasing an oxygen concentration in the outer peripheral portion on an exit cross-sectional plane of said fuel nozzle to an amount that is higher than an oxygen concentration in the central portion.