RESUMO

The pilot engineering project of a new plasma-fire shaft furnace for mixed toxic-radiowaste incineration both for solid and liquid waste is designed and numerically studied. The typical waste multi-steps pyrolysis processing is finally accompanied with a thermal plasma afterburning of produced gases, including air quenching of them against the secondary toxic postformation. The waste processing is performed under a fill-fixed bed of such well combustable and filtering material as wood sawdust which loads cross along with waste. Provided to sufficient proportion of them as well as gas filtration flow rate is optimally low and waste charge with filtering material bed are sufficiently height, in project it numerically results in not less then 95-97 % of flying ashes and aerosols reached the filtering material. The furnace is equipped with two liquid fuel jets and four air plasma torches (electric arc plasmatrons) which of them two ones are installed in afterburner above the furnace. Toxic organic liquids can be combusted as such of fuels. When liquid aqueous waste is to be processed the jets are used for its pulverization and vaporization under the thermal action of plasma torches in the furnace. In all cases the filtering material is proposed to be used. For toxic metals capture and calcination with ash for disposal the proper sorbent saturation of filtering material is proposed to be used and studied. The project is officially approved with all safety and environmental standards observed.