The Chemistry of Scrubbing Ammonia (NH3)
In chemical and fertilizer manufacturing, the release of fugitive ammonia (NH3) gas poses severe respiratory hazards and environmental compliance issues. Because ammonia is highly water-soluble, Packed Bed Wet Scrubbers are the most efficient extraction technology. The exhaust gas is driven upward through a deep bed of structured or random packing media, creating a highly turbulent, high-surface-area environment.
Liquid-to-Gas (L/G) Ratio and Reagent Dosing
To maximize the mass transfer coefficient, the scrubbing liquid (typically water dosed with dilute sulfuric acid to form ammonium sulfate) is sprayed counter-currently over the packing. Engineers must strictly calculate the Liquid-to-Gas (L/G) ratio to ensure the packing remains fully wetted without flooding the column, guaranteeing a destruction and removal efficiency (DRE) of 99.9% before atmospheric discharge.