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US 9,409,123 B2Granted
Control of wet scrubber oxidation inhibitor and byproduct recovery
AssigneeASA-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.
Claims15
A system, comprising:
- an input to receive a waste gas comprising an acid gas and at least one of elemental iodine and an iodine-containing composition;
- a wet scrubber to treat the waste gas to remove at least a portion of the acid gas and the at least one of the elemental iodine and iodine-containing composition from the waste gas and form a scrubbing solution comprising at least one of an acid derived from the acid gas and a derivative thereof and at least one of the elemental iodine and iodine-containing composition;
- and
- a carbonaceous material to remove, from the scrubbing solution, at least a portion of the at least one of the elemental iodine and iodine-containing composition, thereby reducing a concentration of the at least one of the elemental iodine and iodine-containing composition in the scrubbing solution.
1 more element
A system, comprising:
- a thermal unit to combust a mercury-containing feed material and produce a mercury-containing gas stream, wherein the mercury-containing feed material comprises a halogen and the mercury-containing gas stream comprises the halogen, an acid gas, and particulates;
- a particulate removal device to remove most of the particulates from the mercury-containing gas stream and form a treated gas stream;
- a wet scrubber to contact the treated gas stream with a scrubber solution and remove the acid gas from the treated gas stream and in a scrubber slurry, the scrubber slurry comprising the halogen;
- and
- a regeneration facility comprising a carbonaceous material to remove the halogen from at least part of the scrubber slurry and form a halogen-containing carbonaceous material for recycle to the thermal unit.
2 more elements
Dependencies are inferred from the claim text.