Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture
Patent
1997-05-05
1999-10-12
Straub, Gary P.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
4232155, 4232421, 42324301, 423508, B01D 5346
Patent
active
059650958
ABSTRACT:
A process is provided for removing vapor phase selenium species produced by the combustion of selenium and sulfur-containing fuel of the kind used to generate electric power in conjunction with a flue gas desulfurization process. In one process embodiment the flue gas leaving the combustion system is humidified by the injection of atomized water or a dilute alkaline slurry at a selected location upstream of the flue gas desulfurization system to cool the flue gas from a temperature of about 300.degree. F. to a temperature of about 280.degree. F. so as to enhance the selenium removal efficiency. In another process embodiment the flue gas leaving the combustion system is first humidified to cool the flue gas from a temperature of about 300.degree. F. to a temperature of about 200.degree. F. so as to enhance the selenium removal efficiency, and then an alkaline sorbent material is injected into the humidified flue gas. Selenium species are removed from the flue gas with the particulates in a particulate control device between the combustion system and the flue gas desulfurization system.
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Hargrove, Jr. Oliver W.
Owens David R.
Peterson Joseph R.
Seeger David M.
Skarupa Ron C.
Electric Power Research Inst.
Straub Gary P.
Studebaker Donald R.
Vanoy Timothy C
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