A desulfurizing agent is added to 20% ammonia water, and the SO2 reacts with the ammonia water to produce ammonium sulfite seriflux, which is forcibly oxidized into ammonium sulfate seriflux. The ammonium sulfate seriflux turns chemical fertilizer, which, after being concentrated, centrifuged, dried and packaged, can be sold with a high economic value.

Ammonia/ammonium sulfate wet FGD is an economical and environmental process which meets the standards of circular economy.