FlowVision A/S products

The SNCR + SCR Hybrid system utilizes the advantages of the SNCR system as well as those of the SCR concept. The objective of the hybrid system is to allow the SNCR section to operate at the top of the optimum curve to achieve maximize possible NOx removal, while NH3 slip is purposely kept high. The excessive NH3 slip allows for the installation of an SCR catalyst layer downstream, however, as a relatively high NOx removal efficiency is already being achieved by the upstream SNCR section (compared with conventional SNCR system), a significantly lower NOx removal efficiency is required by the SCR section.