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US 10,758,863 B2Granted
Control of wet scrubber oxidation inhibitor and byproduct recovery
AssigneeADA-ES, Inc.
InventorsSharon Sjostrom, Kenneth E. Baldrey, Constance Senior
Life of this patent
Estimating the term…
Abstract
The present disclose is directed to a method for controlling iodine levels in wet scrubbers, and, in particular, recirculating wet scrubbers by removing the iodine from the scrubbing solution, such as by using ion exchange, absorption, adsorption, precipitation, filtration, solvent extraction, ion pair extraction, and an aqueous two-phase extraction.
Claims26
A method, comprising:
- receiving a waste gas comprising an acid gas and at least one of an elemental halogen and a halogen-containing composition;
- passing the waste gas through a wet scrubber to remove at least a portion of the acid gas and the at least one of the elemental halogen and the halogen-containing composition from the waste gas to form a scrubbing solution comprising at least a portion of at least one of an acid derived from the acid gas and a derivative thereof and at least one of the elemental halogen and the halogen-containing composition;
- and
- removing, from the scrubbing solution, at least a portion of the at least one of the elemental halogen and the halogen-containing composition, thereby reducing a concentration of the at least one of the elemental halogen and the halogen-containing composition in the scrubbing solution.
1 more element
A method, comprising:
- receiving a waste gas comprising elemental mercury;
- contacting a halogen-containing additive with the waste gas upstream of a wet scrubber to oxidize the elemental mercury in the waste gas to a non-elemental mercury;
- passing the waste gas through the wet scrubber to remove at least a portion of at least one of an elemental halogen and a halogen-containing composition derived from the halogen-containing additive and form a scrubbing solution comprising the removed at least a portion of the at least one of the elemental halogen and the halogen-containing composition;
- and
- removing, from the scrubbing solution, the removed at least a portion of the at least one of the elemental halogen and the halogen-containing composition, thereby reducing a concentration of the at least one of the elemental halogen and the halogen-containing composition in the scrubbing solution.
2 more elements
A method, comprising:
- receiving a waste gas comprising at least one of an elemental halogen and a halogen containing composition;
- passing the waste gas through a wet scrubber to remove at least a portion of the at least one of the elemental halogen and the halogen-containing composition from the waste gas and form a scrubbing solution comprising the removed at least a portion of the at least one of the elemental halogen and the halogen-containing composition;
- removing, from the scrubbing solution, the removed at least a portion of the at least one of the elemental halogen and the halogen-containing composition;
- and further comprising one of:
- (i) applying the removed at least a portion of the at least one of the elemental halogen and the halogen-containing composition to coal, wherein the coal and the removed at least a portion of the at least one of elemental halogen and a halogen-containing composition applied to the coal are combusted to form the received waste gas;
- and
- (ii) introducing the recovered at least a portion of the at least one of the elemental halogen and the halogen-containing composition into the waste gas as a halogen-containing additive.
4 more elements
Dependencies are inferred from the claim text.