PROCESS FOR DRY DESUIFURIZATION OF FLUE GAS

摘要

Sulfur oxides in coal-fired boiler fine gas are adsorbed by an adsorbent prepd. by dry-distilling a portion of fuel coal having an ash content lower than 15 wt. and/or fixed C content of at least 50 wt.%. The semi-coke is activated by steam and the S oxides-adsorbed adsorbent is heated to desorb the adsorbed S oxides at a high concn. Desorbed S oxides are passed through a bed of semi-coke before activation to recover S oxides as S.