PLASMA SHAFT FURNACE FOR PROCESSING OF RADIOACTIVE WASTE Russian patent published in 1994 - IPC

FIELD: equipment for processing of radioactive waste. SUBSTANCE: plasma generator 10 installed in oxidation zone in PLASMA shaft furnace is used for burning of solid unidentified waste. Liquid noncombustible waste is fed into zone 5 of pyrolysis with the aid of circular feeder 6 for stabilization of process of pyrolysis and decrease of carry-over of radionuclides. Unit 14 of slag formation is provided with homogenization chamber 15 where slag 27 is produced and is held in reduction atmosphere of plasma flame 29 generated with plasma reactor 16 from liquid combustible waste. Additional suppression of volatilization of radionuclides from slag 27 is performed thanks to electrokinematic effect with the use of code electrode 23 and anode 19 connected to source 24. By-pass conduit 11 coupled with the help of holes 12 with diameter 0.05-0.12 of diameter of shaft with zone 3 of drying, zone 5 of pyrolysis and zone 8 of burning is used to avoid emergency situations. Invention makes it possible to prevent uncontrolled ejection of radionuclides into surrounding environment. EFFECT: increased radiation safety. 2 dwg, 1 tbl