Tri-Mer Air Pollution Control Systems

- Sulfur Dioxide (SO2) Scrubbers

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Sulfur dioxide (SO2) is a colorless, toxic gas that is formed from burning sulfur. Exposure to high levels of SO2 can be life threatening to human and environmental health. Control measures by the EPA, for SO2 pollution, specify amounts of sulfur dioxide to be present in the air. Tri-Mer’s SO2 scrubbers are custom-built UltraCat systems that use dry sorbent injection of calcium or sodium-based sorbents (hydrated lime, sodium bicarbonate or trona) to control the pollution of sulfur oxides (SO2, SO3), hydrochloric acid (HCl) and hydrogen fluoride (HF) with ultra-high efficiencies.

The ceramic surface provides a stable foundation for the sorbent cake for maximum SO2 removal.

With dry sorbent injection in the duct, upstream of the filters, the additional particulate from the sorbent is captured easily along with the other pollutants. The SO2 removal reaction occurs within the duct prior to the filter and at the filter cake that accumulates on the filters’ surface.

The reaction of the sorbent with the acid gas creates a solid particle that is also captured on the filters along with the unreacted sorbent and the process particulate.

With dry sorbent injection, SO2 removal is typically 90% or higher, with removal efficiencies as high as 97%. HCl removal is typically 95%, and often as high as 99%. Temperature range for effective removal is 300°F to 1500°F.

Dry sorbent injection and new engineered sorbents have revolutionized dry removal of SO2, SO3, HCI and HF. Hydrated lime sorbents are easy to dispose of in landfills because of minimal leaching. High SO2 removal is possible without the cost and complexities of spray-drying or wet waste.

SO2 scrubbers that remove acid gases such as SOx and HCl also capture all PM in the process gas to very low levels. These systems can also be configured to simultaneously remove NOx, dioxins, O-HAPs, and mercury.

Want a simple, cost-effective, retrofit for dry sorbent injection? Check out our patented SorbSaver technology for a solution.

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