Radioactive waste resin Fenton oxidation waste liquid drying and volume-reducing treatment device and method

Abstract

The invention discloses a radioactive waste resin Fenton oxidation waste liquid drying and volume-reducing treatment device and method. The device comprises a waste liquid conveying and metering unit,a drying unit and a tail gas treatment unit, the waste liquid conveying and metering unit comprises a waste liquid temporary storage tank, a conveying pump and a constant-volume metering tank; and the drying unit comprises an electric heater, a drying barrel, a sealing top cover, a temperature sensor, a temperature controller and a pressure sensor. The provided radioactive waste resin Fenton oxidation waste liquid drying and volume-reducing treatment device and method can minimize the radioactive wastes generated in Fenton oxidation process of waste resin, and the subsequent processing cost is reduced.

Description

technical field [0001] The invention relates to the technical field of radioactive waste volume reduction treatment, in particular to a device and method for drying volume reduction treatment of radioactive waste resin Fenton oxidation waste liquid. Background technique [0002] The radioactive waste resin containing organic matter is one of the difficulties in domestic radioactive waste management. At present, the radioactive waste resin produced by nuclear military units is mostly in a temporary storage state, and the radioactive waste resin produced by nuclear power plants is mostly treated by traditional cement curing process. The solidification of waste resin cement has the advantages of simple process, mature technology, and low processing cost, but there are technical bottlenecks in waste volume expansion and long-term stability of the solidified body. [0003] At present, the inorganic volume reduction treatment technology of radioactive waste resin is a research ho...

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Problems solved by technology

The advantage of cement solidification treatment is that the process is mature, the treatment cost is low, and the waste liquid cement can directly meet the final disposal requirements after solidification; but the disadvantage is that the oxidized waste liquid needs to use a large amount of chemical reagents for pH adjustment before curing, and the waste liquid is returned after modulation. It must be evaporated and concentrated for a long time before the cement is solidified

There are two commonly used technical routes for the deep purification of radioactive waste liquid: one is the membrane treatment process. The disadvantage of this method is that the high selectivity of the membrane is closely related to the characteristics of the waste liquid. Before membrane treatment, filtration, ion exchange, microfiltration or even Ultrafiltration and other pretreatments require many process steps and a large amount of secondary waste

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