Flue gas desulfurization process

Details Flue gas desulfurization process Flue gas desulfurization process

B - Operations, Transporting

01

D

23/349

B01D 53/14 (2006.01) B01D 53/34 (2006.01) B01D 53/50 (2006.01)

Patent

CA 2032573

IMPROVED FLUE GAS DESULFURIZATION PROCESS ABSTRACT OF THE DISCLOSURE A wet, calcium-based, flue gas desulfurization process for reliably and cost effectively removing sulfur dioxide from the flue gas generated by the combustion of fossil fuels containing sulfur includes the step of contacting the combustion flue gas preferably as a part of the scrubbing liquor, with an aqueous solution containing formate ions and a dissolved calcium concentration reduction agent. The latter reduces the dissolved calcium concentration present in the flue gas which, in turn, reduces the coprecipitation and loss of formate within and from the system. Also, by contacting the flue gas with an aqueous solution comprising formate and thiosulfate ions, the formate coprecipitation within the system is reduced independent of the calcium concentration level within the system.

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