Envitech NOx Scrubber Uses a Multi-Stage Packed Bed Absorber

When concentrations of both NO & NO2 are significant, a multi-stage scrubbing system is required. The Envitech NOx Scrubber removes NOx in a three stage packed bed absorber system. The hot gas passes to the first absorber, where NaOH removes the majority of NOx. In the second absorber, NaOCl oxidizes NO to NO2. Finally, in the third absorber, NaOH combines with NO2, leaving only nitrogen and eliminating any visible emissions.

The Envitech NOx scrubber is designed to perform at greater than 99% removal efficiency. The stack gas is clean, and no toxic byproducts are present in the blowdown.