Controlling Nitrogen Oxides from waste incineration by Selective Non Catalytic Reduction method

Nitrogen Oxides pollutants are serious threat of environment and health of human being. Selective Non Catalytic Reduction (SNCR) method is one of the Nitrogen Oxide reducing methods which its advantages are low cost, catalyst free, ease of installation and applicability to all types of stationary fired equipment. In this research, a municipal waste incinerator of Daejon city in South Korea was simulated and its predicted temperature field was validated by experimental data. Combustion of the same incinerator with Tehran waste quality and 40%, 80% and 120% excess air modelled and reduction efficiency of the SNCR method by applying 18% ammonia and urea solutions as reagents were studied. Effects of different parameters on Nitrogen Oxide reducing efficiency and suitable locations for injection of ammonia and urea solutions studied. Results show that reduction of output Nitrogen Oxide of incinerator strongly depends on mean temperature of injection location, reagent mass flow and droplet size.

Keywords:

Waste , Incineration , Nitrogen Oxide , SNCR , Droplet