By utilising the SCR (Selective Catalytic Reduction) denitrification method, the two hot water boilers at the Kaweczyn Heating Plant in Poland, where ORGREZ implemented this technology, now emit significantly fewer nitrogen emissions (NOx), thus complying with the strictest legal standards for such equipment.
The SCR technology installed reduces nitrogen oxide emissions produced during fuel combustion inside the boiler. Flue gases produced by coal combustion, into which an aqueous ammonia solution is dosed in a controlled manner by the SCR system, are directed to the catalyst, where the final chemical reaction occurs. The key difference between SCR and the more commonly used non-catalytic SNCR method is that SCR guarantees compliance with applicable emission limits during future boiler operation while significantly reducing the residual ammonia content in the flue gases. The theoretical efficiency of SCR technology in reducing NOx in flue gases is around 80–90%.
