摘要 |
A method for treating the fine-grained spend 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 DEG C. to about 1000 DEG C. to produce a dry essentially fully oxidized pelletized calcium sulfate product. Calcium sulfate pellets having an average diameter of from about 0.5 mm to 5 mm and containing from about 1% to about 3%, by weight, of binder constituents, are composed of agglomerated calcium sulfate particles having an average diameter of from about 50 mu to about 100 mu bound to each other by the binder constituents. |
申请人 |
DORR-OLIVER INC., STAMFORD, CONN., US |
发明人 |
ANGEVINE, PETER ALLEN, RIDGEFIELD CT 06877, US;BENGTSSON, SUNE, W-6350 BAD NAUHEIM, DE;KOUDIJS, GEORGE P., NL 1175 LJ LIJNDEN (POST BADHOEVENDORP), NL |