Movable minitype medium-low radioactive waste gasification and melting treatment system and method thereof

Abstract

The invention discloses a movable minitype medium-low radioactive waste gasification and melting treatment system and method thereof. The movable minitype medium-low radioactive waste gasification andmelting treatment system comprises a crusher, a pneumatic diaphragm pump, a plasma gasification and melting furnace, a melting vitreous body receiver, a burning chamber, a primary direct heat exchanger, a ceramic filter, a secondary direct heat exchange, an activated carbon adsorption tower, a deacidification washing tower, an efficient air filter, a chimney and mobile equipment. The waste is subjected to pretreatment and is conveyed into the plasma gasification and melting furnace, and then gasification reaction is carried out in an in-furnace gasification area so as to produce synthetic gas; the synthetic gas is introduced into the burning chamber, is fully burned and decomposed, and then is fed into a flue gas purification treatment system; ash residues enter into a melting area and are subjected to vitrification melting treatment so that radioactive nuclide is fixed in a melting vitreous body, and the vitreous body is cooled, is barreled and stored by an automatic receiving systemand is subjected to landfilling in a near surface area of a medium-low radioactive waste landfill. The movable minitype medium-low radioactive waste gasification and melting treatment system disclosed by the invention has the advantages of being good in volume reduction effect, high in safety and reliability, high in nuclide stability and high in process integration of the system.

Description

technical field [0001] The invention relates to a gasification and melting treatment system and a method thereof, in particular to a mobile small-scale gasification and melting treatment system for medium and low radioactive waste and a method thereof. Background technique [0002] Nuclear facilities produce several tons of low- and medium-level radioactive waste every year. Solid waste is treated by super compression + cement solidification, and liquid waste is treated by evaporation + cement solidification technology, and finally stored in 200L steel drums. Although the cement solidification technology can achieve harmless treatment of radioactive waste, and although the super compressor can further compress and reduce the waste, cement solidification is a capacity-enhancing technology, and the space of offshore nuclear facilities is limited. However, it cannot fundamentally solve the problem of nuclide leaching and diffusion in waste. Although the incineration method for...

AI Technical Summary

Problems solved by technology

Although the cement solidification technology can achieve harmless treatment of radioactive waste, and although the super compressor can further compress and reduce the waste, cement solidification is a capacity-enhancing technology, and the space of offshore nuclear facilities is limited. pressure, and cannot fundamentally solve the problem of nuclide leaching and diffusion in waste

Although the incineration method has a significant volume reduction effect on combustible waste, the problem of dioxin pollution generated during the incineration process has always been the focus of attention

And because the incineration produces a large amount of flue gas, it not only increases the burden and cost of tail gas treatment, but also easily causes the further diffusion of radionuclides with the flue gas, which is not conducive to the capture and control of radionuclides. The slag cannot be melted, and radionuclides and other heavy metals that seriously pollute the environment cannot be captured and solidified.

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