Method for controlling gaseous mercury emission between two or more coal-fired combustion units
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United States of America Patent
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Oct 24, 2017
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Mar 25, 2016
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Mar 25, 2015
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Abstract
The present invention relates to coal-fired power plants and flue gas emissions and more specifically, to controlling gaseous mercury emissions in the flue gas between two or more coal fired electric generating units within a contiguous power plant site to achieve environmental regulation limits for mercury emissions. This is accomplished by continuously adjusting the application rates of mercury oxidant, which is added to a coal feed to oxidize elemental mercury for improved mercury capturability and aqueous mercury precipitant (liquid), which is added to a scrubber liquor of a wet Flue Gas Desulfurization (FGD) unit to precipitate out oxidized mercury into solid form for improved capture and disposal.
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