Sodium-limestone double alkali flue gas desulfurization method

Details Sodium-limestone double alkali flue gas desulfurization method Sodium-limestone double alkali flue gas desulfurization method

B - Operations, Transporting

01

D

23/349

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

Patent

CA 1182982

ABSTRACT: Sodium-Limestone Double Alkali Flue Gas Desulfurization Method A flue gas desulfurization method for efficiently removing sulfur oxides from a gas stream with an aqueous sodium sulfite- and sodium bisulfite-containing absorp- tion solution, in which absorber effluent solution at a pH of from 5.8 to 6.6 and having an active sodium concentration of from 0.5M to 0.9M is regenerated with sufficient ground limestone to yield a treated solution with a higher pH of from 6.3 to 7.0 and whose bisulfite concentration is reduced by from 35 to 70%.

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