Method for oxidation of flue gas desulfurization absorbent...

Details Method for oxidation of flue gas desulfurization absorbent... Method for oxidation of flue gas desulfurization absorbent...

C - Chemistry, Metallurgy

10

K

23/103, 23/349

C10K 1/20 (2006.01) B01D 53/50 (2006.01) B01J 20/04 (2006.01) C01F 11/46 (2006.01)

Patent

CA 1224010

METHOD FOR OXIDATION OF FLUE GAS DESULFURIZATION ABSORBENT AND THE PRODUCT PRODUCED THEREBY ABSTRACT OF THE DISCLOSURE A method for treating the fine-grained spent absorbent (primarily calcium sulfite and calcium sulfate) from a dry flue gas desulfurization process. The absorbent, having a small amount of binder therein, is oxidized in a fluidized bed reactor at a temperature in the range from about 700°.C to about 1000°.C to produce a dry essentially fully oxidized pelletized calcium sulfate product. Calcium sulfate pellets having an average diameter of from about 0.5mm to 5mm and containing from about 1% to about 3%, by weight of binder constituents, are composed of agglomerated calcium surface particles having an average diameter of from about 50% to about 100µ bound to each other by the binder constituents .

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