Experimental study on NO reduction by reburning of biomass wastes
Abstract：The NO reduction by reburning of biomass wastes, i. e. , wood bark, wood fine and paper mill sludge, was ex- perimentally studied in a two-stage furnace with simulated flue gas. NO reduction efficiency was tested at reburning temperature of i 250 ℃and burnout temperature of i 150 ℃ respectively. The results show that NO reduction efficien- cy during reburning of these biomass wastes achieves 90% when the reburning stoichiometrie ratio is in the range of 0. 90-0.95. The intermediate products during reburning,HCN/NH3 ,were examined and Fe203 was selected to con- trol the formation of HCN/NH3. A further test on both reburning and burnout was conducted by mixing Fe2O3 with above biomass fuels. The results show that the final NO reduction efficiency after reburning and burnout of wood fine and paper mill sludge exceeds 70% and finally comes close to the efficiency of methane when the mole fraction of Fe2O3 is higher than 4×10-3 ,which demonstrates that the biomass wastes can be used as alternative reburning fuels.
Keywords：biomass wastesNO reduction by reburningcombustion pollutant controlnitrogen oxide
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 1201-1204 )