An Experimental Study on Nitric Oxide Reduction through Coal-Biomass Blend Reburning
Nitric oxide (NO) reduction through coal, biomass and their blend reburning is conducted on a drop tube furnace experimental system and it is proved to be feasible of using the coal-biomass blend as the reburning fuel. For a high NO reduction efficiency, the excess air ratio in the reburning zone should be less than 0.9 and the reaction temperature is required to be higher than 1373K. 50-60% of the biomass percentage in the blend is enough for an acceptable efficiency. At the same time, for a thorough NO reduction process, the reburning fuel fraction and the residence time in the reburning zone must be guaranteed about 20% and 0.6-0.8s, respectively. Also, when the initial NO concentration is excess 600ppm, the efficiency is varied little at different NO concentrations.
S. L. Niu et al., "An Experimental Study on Nitric Oxide Reduction through Coal-Biomass Blend Reburning", Advanced Materials Research, Vols. 383-390, pp. 3017-3021, 2012