STEAG SCR-Tech, Inc.

SO2 Emission Control

In the 1970s, power plant emissions from southern and central Europe began impacting Scandinavian forests. As a result, regulations took effect in countries like Germany restricting the emission of sulfur dioxide, the primary component of acid rain.

The major type of control installed to reduce sulfur dioxide is wet flue-gas desulfurization (FGD), although there are many types of reagents that can be used in FGD systems. One common method uses a limestone slurry that reacts with sulfur dioxide to form calcium sulfite and carbon dioxide; in some cases, the FGD system further oxidizes the calcium sulfite to produce marketable gypsum, a material often used in drywall in other products. An FGD can also use lime or magnesium hydroxide to scrub out the SO2.

STEAG SCR-Tech began operating its FGD pilot project in 1968, giving us over 4 million hours of experience with the technology. Since then, our SO2 removal rate has been 95%. We have provided engineering and consulting services for over 27,000 MW of FGD capacity, more than 25,000 MW of which were FGD retrofits.

Whether you need a lime or limestone system, dry sorbent or ammonia injection system, STEAG SCR-Tech can work with you and your project

Roughly 85% of FGDs in the US are wet scrubbers.

Efficient dry scrubbers for a variety of power plant configurations




Mark Ehrnschwender
Vice President
(704) 734-0688 x228

Go to top   |    Send Page   |    Print