Industrial Wet Scrubbers for Acid Gas Removal

Counter-Current Alkaline Absorption

Hot off-gas is drawn upward through the scrubber vessel against a descending spray of alkaline solution. The fine droplets give a large surface area for gas-liquid contact, so acid gas molecules dissolve into the liquid and the gas stream cools rapidly as it passes through, before continuing on to the stack.

The alkaline reagent, typically sodium hydroxide, reacts with hydrogen chloride, sulphur dioxide and hydrogen fluoride to form soluble salts, which collect in the vessel sump. A pH-controlled dosing loop keeps reagent concentration matched to the inlet acid-gas loading, and an optional downstream activated carbon reactor can be added where trace organics or heavy metals also need to be captured.

Because the process uses water and produces a reaction liquor, wet scrubbing suits sites with a reliable water supply and a route for treating the resulting effluent. Where water is scarce or effluent handling is impractical, our ceramic filtration system reaches comparable compliance using a dry process instead.

The vessel, spray stages and dosing skid are supplied as a standalone system, engineered around your gas volume and inlet loading, and retrofitted to an existing furnace, boiler or thermal process off-gas duct, not only supplied as part of a new Macrotec incinerator.