PGE/REWE 2015

Sessions Speakers Exhibitors Products Press Releases Show Specials Floor Plan

How Installed Plant Equipment and Emission Limits Guide Mercury Removal Technology Choices (Room G109, Auditorium Centre, First Floor)

Different technologies are available for mercury emission reduction from coal-fired power plant stack gas. Some of the most common technologies are halogen addition to the coal for mercury oxidation; various sorbents added to the coal and/or injected into the flue gas; the addition of chemicals and/or sorbents into the WFGD absorber tanks and Dry FGD vessels. These choices should be driven by the equipment in place. A plant that has only a cold-side ESP and no FGD would favor one approach, whereas a dry FGD with bag house would favor another. Data from a number of tests during the past few years will be presented showing the relationship between the type of equipment, and how the technology choice was driven by the site-specific aspects of each plant. Cost comparison analysis will also be presented for different technologies for mercury emission compliance.
Data from recent testing using the electrochemical noise (ECN) probe technique to determine rate of air heater corrosion when adding halogen for mercury oxidation will also be presented.