| 摘要 |
Radioactive waste is disposed of by incineration with addition of an oxidising agent in an electric furnace with two temperature zones; the first at 200-400 det. C in which the gas is removed; and the second at 800 deg. C or higher, where the degassed solid waste is further heated. - Gaseous prods. from the first stage pass also through the second stage. Waste gases are pref. washed, esp. by water introduced into the first stage and passing through into the second stage at higher temperature. After this the waste gases, after discharge from the furnace, are burnt. After this combustion, the gases may be at least partly recycled into the furnace, and used for preheating the gases before combustion. The preheated gases are pref. passed through an aerosol filter. (0/2) EPAB- EP-143364 B A process for eliminating toxic, particularly but not exclusively radioactive wastes, through incineration with the addition of an oxidising agent, in which gaseous end products are subjected to further treatment in a flue gas installation and solid residues are filled into containers, characterised in that the wastes are firstly de-gassed in an electrically-heated furnace in a first temperature zone of 200-400 deg. C; that the de-gassed wastes are led through a second temperature zone at more than 800 deg. C; that the gases from the first temperature zone are led through the second temperature zone; and that the flue gases are burned with excess oxygen outside the furnace. (9pp)w USAB- US4655968 A Toxic and partic, radioactive wasts contg. oxidisable components are treated, to form solid residues of reduced vol. and gaseous prods. free of toxic constituents, by degasifying the waste at 200-400 deg.C in an electric furnace, passing to a second furnace zone at above 800 deg.C, and passing gases from the first zone into the second in intimate contact with the wastes. - In the second zone the waste is pyrolysed and reacted with the gases to gasify a substantial part and leave a reduced vol. of solids containing the toxic constituents which are discharged from the furnace. The gases are burned outside the furnace with oxygen, pref. after scrubbing with water, the scrubbing water being passed into the first and then the second zone of the furnace.
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