Abstract:

Reburning of flue gas is an effective method for NO_x emission control in furnace during combustion of coal. The conventional reburning fuel，i.e.，natural gas and coal，was discussed with respect to their bottlenecks of reburning. Then the merit of waste tire as an alternative reburning fuel was analyzed and the state-of-the-art waste tire reburning was reviewed. The results showed that 86% original NO_x was reduced when waste tire combined with lignite ash was used as reburning fuel. NO_x reduction efficiency was as high as 88% when waste tire mixed with Fe₂O₃ was used for reburning，which was much higher than that of coal and natural gas. Waste tire has important engineering application advantage when it is used as reburning fuel，which is helpful for both its utilization as a new energy source and the reduction of NO_x pollutant emission.