Removal of Mercury from SBW Vitrification Off-Gas by Activated Carbon

Deldebbio, John Anthony ; Watson, T. T. ; Kirkham, Robert John

Idaho National Laboratory

关键词: Removal;    Calcination;    Sbw;    Off-Gas;    Activated Carbon;   

DOI  :  10.2172/910982
RP-ID  :  INEEL/EXT-01-01227
RP-ID  :  DE-AC07-99ID-13727
RP-ID  :  910982

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来源: UNT Digital Library

【 摘 要 】

Radioactive, acidic waste stored at the Idaho Nuclear Technology and Engineering Center (INTEC) have been previously converted into a dry, granular solid at the New Waste Calcining Facility (NWCF). As an alternative to calcination, direct vitrification of the waste, as well as the calcined solids in an Idaho Waste Vitrification Facility (IWVF) is being considered to prepare the waste for final disposal in a federal repository. The remaining waste to be processed is Sodium-Bearing Waste (SBW). Off-gas monitoring during NWCF operations have indicated that future mercury emissions may exceed the proposed Maximum Achievable Control Technology (MACT) limit of 130 ug/dscm (micrograms/dry standard cubic meter) @ 7% O2 for existing Hazardous Waste Combustors (HWC) if modifications are not made. Carbon monoxide and hydrocarbon emissions may also exceed the MACT limits. Off-gas models have predicted that mercury levels in the off-gas from SBW vitrification will exceed the proposed MACT limit of 45 ug/dscm @ 7% O2 for new HWCs. NO2/44% H2O.