July 19, 2012
ICAC and MARAMA collaborated to address the latest issues and technologies available to control SO2 and HCL. Three technologies were covered on this webinar. They included:Note: Click on the presenters name to view their bio.
WET FLUE GAS DESULFURIZATION UPGRADES
Amy Evans of MET will discuss the Wet Flue Gas Desulfurization Upgrades for MATS Regulatory Compliance. She will review the different approaches to improving SO2 control efficiency in existing wet flue gas desulfurization systems to achieve compliance with the pending Utility Mercury and Air Toxics Standard.
DRY SORBENT INJECTION (DSI)
Dry Sorbent Injection of Trona or Sodium Bicarbonate for Air Pollution Control
Yougen Kong, Ph.D., P.E., Solvay Chemicals Inc.
This presentation describes dry sorbent injection (DSI) technology with trona or sodium bicarbonate to mitigate SO2, SO3 and HCl. It starts with the sorbents: trona and sodium bicarbonate, and then followed by the mitigation performance of SO2, SO3 and HCl. This technology has been used successfully for over 20 years at many utility and industrial boilers.
Dry Sorbent Injection of Hydrated Lime for Acid Gas Control
Howard B. Fitzgerald, Lhoist North America
This presentation describes dry sorbent injection (DSI) technology with hydrated lime as a sorbent to SO2, HCl, SO3 and HF. The presentation will describe the sorbents effectiveness with mitigation of each acid gas at different temperature regions and particulate collection devices, as well as, a comparison of the performance of hydrates with differing properties. A discussion of dry sorbent injection systems and manufacturers will be provided.
CIRCULATING DRY SCRUBBERS
Circulating Dry Scrubbers (CDS) is a cost-effective, highly efficient system designed to remove acid gas constituents, including SO2, SO3, HCl, HF, mercury, and other trace pollutants from flue gas streams. It is ideally suited for coals with sulfur contents below 3.0% with typical acid gas removal efficiencies greater than 97%. CDS technology provides enhanced contact of finely atomized water, hydrated lime and flue gas through high levels of solid recirculation, within a fluid bed reactor. Lime and finely atomized water are injected independently into the reactor to lower the flue gas temperature and enhance acid gas absorption capacity. The fluid bed material is comprised of solids, including calcium hydroxide, fly ash from the combustion process, and solid reaction products recycled from the flue gas particulate collection device. Upon leaving the reactor, the solid particles are separated from the flue gas in a fabric filter baghouse and recycled back to the reactor.
The operation principles of the various technologies;
Maintenance requirements and operation and maintenance costs and;