Efficient adsorption treatment method for radioactive waste resin Fenton oxidation waste liquid

A radioactive waste resin and Fenton oxidation technology, which is applied in radioactive purification, nuclear engineering, etc., can solve the problems of large amount of secondary waste and many process links, and achieve the effect of low cost, simple process and strong applicability

Pending Publication Date: 2019-10-22
CHINA INST FOR RADIATION PROTECTION
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Problems solved by technology

The advantages of the former are that the process is mature, the treatment cost is low, and the stabilization treatment of cement solidification can directly meet the final disposal requirements. , after a long time of evaporation and concentration, the cement is solidified
[0009] There are two technical routes for the deep purification of radioactive waste liquid: one is to use advanced membrane treatment technology, the disadvantage of this method is that the high selectivity of the membrane is closely related to the characteristics of the waste liquid, and filtration, ion exchange, micro Filtration or even ultrafiltration and other pretreatments have many process steps and a large amount of secondary waste; the second is ion exchange and adsorption. This method requires the use of highly adsorbent adsorbents, especially inorganic ion exchangers. Molecular sieves have better The physical and chemical structure is stable, and the molecular sieve adjusted by the appropriate silicon-aluminum ratio shows efficient ion-selective adsorption for metal ions

Method used

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  • Efficient adsorption treatment method for radioactive waste resin Fenton oxidation waste liquid
  • Efficient adsorption treatment method for radioactive waste resin Fenton oxidation waste liquid

Examples

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Effect test

Embodiment 1

[0040] Example 1: High-efficiency adsorption treatment of radioactive waste resin Fenton oxidation waste liquid (1)

[0041] The characteristic composition of radioactive waste resin Fenton oxidation waste liquid is as follows:

[0042] SO 4 2- The concentration is 47g / L, Fe 2+ The concentration is 175mg / L, Fe 3+ The concentration is 1300mg / L, the COD value is 200mg / L, the pH value is 2.5, and the conductivity is 80ms / cm; the radioactive levels of Co-60, Cs-137, and Sr-90 three kinds of nuclides in the oxidation waste liquid are respectively ( 1.5-9.0)×10 6 Bq / L, 1.0×10 4 -2.0×10 5 Bq / L, 1.0×10 3 -1.0×10 4 Bq / L.

[0043] The steps of the efficient adsorption treatment method of the radioactive waste resin Fenton oxidation waste liquid are as follows:

[0044] (1) Radioactive waste resin Fenton oxidation waste liquid is filtered to remove the residue and insoluble matter (filtered by a filter with a pore size of 10-100 μm, the proportion of insoluble matter in the oxi...

Embodiment 2

[0047] Example 2: High-efficiency adsorption treatment of radioactive waste resin Fenton oxidation waste liquid (two)

[0048] The characteristic composition of radioactive waste resin Fenton oxidation waste liquid is as follows:

[0049] SO 4 2- The concentration is 47g / L, Fe 2+ The concentration is 175mg / L, Fe 3+ The concentration is 1300mg / L, the COD value is 200mg / L, the pH value is 2.5, and the conductivity is 80ms / cm; the radioactive levels of Co-60, Cs-137, and Sr-90 three kinds of nuclides in the oxidation waste liquid are respectively ( 1.5-9.0)×10 6 Bq / L, 1.0×10 4 -2.0×10 5 Bq / L, 1.0×10 3 -1.0×10 4 Bq / L.

[0050] The steps of the efficient adsorption treatment method of the radioactive waste resin Fenton oxidation waste liquid are as follows:

[0051] (1) Radioactive waste resin Fenton oxidation waste liquid is filtered to remove the residue and insoluble matter (filtered by a filter with a pore size of 10-100 μm, the proportion of insoluble matter in the o...

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Abstract

The invention belongs to the technical field of radioactive waste treatment, and relates to an efficient adsorption treatment method for a radioactive waste resin Fenton oxidation waste liquid. The method comprises: (1) filtering a radioactive waste resin Fenton oxidation waste liquid to remove the residue and the insoluble matter, and adsorbing with a molecular sieve; and (2) measuring the nuclide radioactivity concentration of the waste liquid adsorbed by the molecular sieve, directly discharging the waste liquid if the measured value is lower than a set value, and making the waste liquid return to the molecular sieve and be adsorbed if the measured value is higher than or equal to the set value. According to the present invention, with the method, the deep purification treatment of thekey feature nuclides Co-60, Cs-137 and Sr-90 can be achieved while the characteristics of the original waste liquid are substantially unchanged, and the treated waste liquid can meet the direct discharge requirement (the total nuclide radioactivity concentration is less than 500 Bq/L).

Description

technical field [0001] The invention belongs to the technical field of radioactive waste treatment, and relates to a high-efficiency adsorption treatment method for radioactive waste resin Fenton oxidation waste liquid. Background technique [0002] The inorganic volume reduction treatment of radioactive waste resin containing organic matter is one of the difficulties in the management of radioactive waste at home and abroad. The fields and scope involved include: [0003] (1) Safe disposal of waste resin temporarily stored in nuclear JG units; [0004] (2) Upgrading of existing resin cement solidification treatment systems in nuclear power plants and JG units; [0005] (3) Safe disposal of waste resins that will be produced in the decommissioning of nuclear facilities in the future. [0006] At present, the waste resin produced by nuclear military units is mostly in a temporary storage state, and the waste resin produced by nuclear power plants is mostly treated with trad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F9/12
CPCG21F9/12
Inventor 郭喜良闫文付闫晓俊白璞郝文峰崔安熙郭宵斌安鸿翔柳兆峰薛海龙冯文东高超刘建琴
Owner CHINA INST FOR RADIATION PROTECTION
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