Desulfurization

What is desulfurization?

Desulfurization—also known as flue gas desulfurization (FGD)—removes SOx (SO₂/SO₃ ) from flue gas by contacting it with an alkaline scrubbing solution in a wet scrubber. We engineer modular systems that use either a wet scrubber or a venturi scrubber and add mist eliminator as required—typically a fiber bed mist eliminator for fine acid aerosol/sulfuric acid mist capture, with vane mist eliminator or mesh pad mist eliminator only where bulk droplets need pre-separation—to ensure reliable emissions compliance.

Why it matters

Reducing SOx (SO₂/SO₃) keeps plants within emissions compliance under EU Industrial Emissions Directive (IED) and BAT-AEL thresholds, as well as U.S. EPA standards. It prevents sulfuric acid dewpoint corrosion in stacks, ducts, and heat exchangers, protects catalysts, and stops acid aerosol/sulfuric acid mist carryover that causes visible plumes (opacity) and health risks. The result is safer operation, longer equipment life, and fewer unplanned shutdowns—verified through emissions measurements and dewpoint monitoring.

How we treats emissions

Our flue gas desulfurization (FGD) technology prioritizes sizing and optimization: we tune gas–liquid contact and residence time to meet permit limits with low pressure drop. An alkaline scrubbing liquid converts sulfur compounds into reusable salts, minimizing waste and supporting circular-economy goals. The FGD system is engineered to maintain emissions compliance, verified by emissions measurements and dewpoint monitoring.

Applications

FGD Scrubbers with high-efficiency mist eliminators remove sulfuric-acid droplets and fine acid aerosol/sulfuric acid mist from flue gas. In sulfuric acid plants, tail-gas scrubbers cut SOx (SO₂/SO₃) and recover value. Metal off-gases with SO₂ and dust are cleaned in packed-bed or venturi scrubber trains to reduce emissions and odors while protecting downstream equipment.