COMBUSTION CHARACTERISTICS OF A RADIANT TUBE BURNER WITH CIRCULATING FLUIDIZED-BED

With a view to improving the performance of a radiant tube burner used as a heating source in industrial furnace, a new combustion technique is proposed in the present study. The technique allows heat-resistent particles to circulate within the burner. The fundamental combustion characteristics of this new combustion technique and the effect of the amount of circulating particles on burner performance are studied using a trial gas burner. Stable combustion of methane gas is confirmed in the stable region of solid circulation, resulting in an increase in heating efficiency and in an improvement in the temperature uniformity of the radiant tube surface. The relation between burner performance and amount of circulating particles is also confirmed in this study.