Electrolytic deep purification and sulfuric acid recovery method of radioactive waste resin Fenton oxidation waste liquid

Abstract

The invention belongs to the technical field of radioactive waste treatment, and relates to a method for deep electrolytic purification of radioactive waste resin Fenton oxidation waste liquid and recovery of sulfuric acid. The method comprises the following steps: (1) sending radioactive waste resin Fenton oxidation waste liquid into an electrolytic cell for electrolysis, the electrolytic cell is divided into an electrolytic cell cathode chamber and an electrolytic cell anode chamber on both sides, and an electrolytic cell cathode chamber is provided with an electrolytic cell; The cathode of the electrolytic cell concentrates the anions, and the anode of the electrolytic cell is arranged in the anode room of the electrolytic cell to concentrate the ions; (2) The electrolysis product in the cathode room of the electrolytic cell is sent to the reduction cell for reduction, and the reduction cell is divided into the cathode room of the reduction cell and the anode of the reduction cell. The cathode chamber of the reduction tank is provided with the cathode of the reduction tank to reduce the radioactive metal nuclide cations flowing into the cathode chamber of the reduction tank, and the anode of the reduction tank is set in the anode chamber of the reduction tank. By using the method of the invention, the purification treatment of radioactive waste resin oxidation waste liquid and the recovery and reuse of sulfuric acid can be better realized.

Description

technical field [0001] The invention belongs to the technical field of radioactive waste treatment, and relates to a method for deep electrolytic purification of radioactive waste resin Fenton oxidation waste liquid and recovery of sulfuric acid. Background technique [0002] Radioactive waste resin containing organic matter is one of the difficulties in the management of radioactive waste at home and abroad (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 processed by traditional cement curing process). [0003] There are currently two technical solutions for the treatment of radioactive waste resin oxidation waste liquid, one is cement solidification treatment, and the other is deep purification treatment. deal with. [0004] The advantages of cement curing treatment are that the process is simple and mature, the treatment cost is l...

AI Technical Summary

Problems solved by technology

[0004] The advantage of cement solidification treatment is that the process is simple and mature, and the treatment cost is low. After the waste liquid cement is solidified, it can directly meet the final disposal requirements. The liquid needs to be evaporated and concentrated for a long time before being solidified with cement, and there are technical bottlenecks in the expansion of waste and the long-term stability of the solidified body

There are two commonly used technical routes for the deep purification of radioactive waste liquid: one is the membrane treatment process. The disadvantage 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 and even ultrafiltration are required. The second is ion exchange and adsorption, which requires the use of adsorbents with high adsorption performance for different nuclides. Adsorption separation of Cs-137 and Sr-90 in radioactive wastewater)

Images