Patent ID: 8795416
Filing Date: 2014-08-05
Classification: B01D,F23J,Y02E

Abstract:
1. A calcium-based, in-situ forced oxidation, gas-liquid contact apparatus for removing sulfur oxides from flue gas from an oxy-fuel combustion process, comprising: a tower having a gas inlet and a gas outlet; a gas scrubbing zone located between the inlet and the outlet, the gas scrubbing zone adapted to receive a calcium-based sulfur oxide absorbing liquid slurry reagent; means for supplying the calcium-based sulfur oxide absorbing liquid slurry reagent to the gas scrubbing zone; a reaction zone located within the tower subjacent to the gas scrubbing zone for collecting partially reacted liquid slurry reagent and scrubbed products from the gas scrubbing zone, the reagent and scrubbed products rising to a set level in the reaction zone; means for introducing oxidation air into the liquid slurry reagent in the reaction zone to force the in-situ oxidation of sulfur compounds collected in the reaction zone; a wall separating and communicating the gas scrubbing zone and the reaction zone, the wall preventing the oxidation air in the reaction zone from entering and mixing with the flue gas in the gas scrubbing zone, the wall extending into the liquid slurry reagent below a nominal depth required to establish and maintain a liquid slurry seal thereby substantially precluding the leakage of flue gas into the reaction zone while allowing the partially reacted liquid slurry reagent and scrubbed products to drain into the reaction zone; wherein the wall includes a perforated plate member extending across the tower between the gas scrubbing zone and the reaction zone; wherein the wall includes at least one drain pipe mounted on the plate member and extending into the liquid slurry reagent below said nominal depth; and including means for venting the oxidation air from the reaction zone to atmosphere.