Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – For radioactive reactant or product
Patent
1977-03-07
1979-03-13
Padgett, Benjamin R.
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
For radioactive reactant or product
2523011W, 65142, G21F 914, G21F 916
Patent
active
041441869
ABSTRACT:
A method for processing aqueous radioactive wastes for noncontaminating and safe handling, transport and final storage wherein nitric acid and/or nitrate containing aqueous radioactive waste solutions are continuously denitrated with formic acid, spray-dried and calcinated in a spray dryer having a spray nozzle surrounded by a reaction chamber, the resulting calcinate is mixed with glass former substances, the mixture is melted and the melt is caused to solidify into a glass, glass ceramic or glass ceramic-like block and the waste gases produced during denitration-drying and calcination are conducted through a filter system in order to remove solid particles that have been carried along by the gas. The process steps of denitration, drying and calcination are effected simultaneously and are terminated with the aid of and the intimate energy exchange in the fine distribute droplets superheated steam in the vicinity of the spray nozzle. The resulting waste gases are cleaned within a filter chamber surrounding the reaction chamber with the spray nozzle. An apparatus is provided for practicing the method.
REFERENCES:
patent: 3101258 (1963-08-01), Johnson
patent: 3673086 (1972-06-01), Drobnik
patent: 3862296 (1975-01-01), Dotson et al.
Krause, H., "Die Verfestigung hochradioactiver Abfalle," Chemie-Ing.-Techn., vol. 45, No. 10a (May, 1973), pp. 648-663.
Drobnik Stefan
Hild Werner
Kaufmann Friedrich
Koschorke Herbert
Gesellschaft fur Kernforschung m.b.H
Kyle Deborah L.
Padgett Benjamin R.
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