In the SNCR process, a reductant is injected into the boiler where the temperature of the flue gas is between 800 and 1100 ℃. The reductant reacts with NOx and produce N2 and H2O without the presence of catalyst. The reductant can be anhydrous ammonia, aqueous ammonia or urea.
For a typical SNCR process, the reductant solution is atomized and introduced by the injector into the high-temperature flue gas close to the outlet of the boiler. The following figure shows the process flow:
Desulfurization efficiency: 40-65%
Ammonia slip ≤ 10 ppm
Boiler efficiency reduction <0.5%
System utilization >98%