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Radioactive waste liquid glass curing method

A radioactive waste liquid and vitrification technology, applied in radioactive purification, nuclear engineering, etc., can solve the problems of economic feasibility, limited application of operability, high investment in vitrification technology equipment, restrictions on radioactive waste vitrification, etc., and achieve high application Prospects and socio-economic benefits, low-temperature safe and efficient vitrification treatment, and the effect of strong operability of equipment

Pending Publication Date: 2022-03-25
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The investment in vitrification technology equipment is high, generally one billion yuan is invested; the operating cost is high; at the same time, because the equipment is in a high temperature environment (generally higher than 1000 ° C), extremely high requirements are placed on the furnace material, and the life of the equipment is short, which restricts vitrification of radioactive waste
[0004] Vitrification is an ideal treatment method for radioactive waste treatment, but its economic feasibility and operability limit its application in radioactive waste treatment

Method used

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  • Radioactive waste liquid glass curing method

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Effect test

Embodiment 1

[0050] A method for vitrification of radioactive waste liquid, comprising the steps of:

[0051] S1. Freezing of radioactive waste liquid: After stirring the formed radioactive waste liquid evenly, it is frozen in a low temperature environment of -10°C to form a radioactive waste liquid frozen body;

[0052] S2. Frozen body crushing: the radioactive waste liquid frozen body formed in step S1 is crushed in a low temperature environment of 0° C., and crushed into a powder with a particle size ranging from 1 to 100 μm to form a powdery radioactive waste liquid frozen body;

[0053] S3. Mixing materials: mixing the powdery frozen radioactive waste liquid formed in step S2 with low-temperature glass frit (melting point is 300° C.) to obtain a premixed material;

[0054] S4. freeze-drying: the premix obtained in step S3 is 0.1~1×10 -3 Under Pa vacuum environment, first dry at below 0°C for about 10h, then control the temperature at 80°C, and continue drying for 10h to obtain a dry ...

Embodiment 2

[0059] A method for vitrification of radioactive waste liquid, comprising the steps of:

[0060] S1. Freezing of radioactive waste liquid: After stirring the formed radioactive waste liquid evenly, it is frozen at a low temperature of 0°C to form a radioactive waste liquid frozen body;

[0061] S2. Frozen body crushing: crush the radioactive waste liquid frozen body formed in step S1 at a low temperature of -10°C, and crush it into a powder with a particle size ranging from 1 to 100um to form a powdery radioactive waste liquid frozen body ;

[0062] S3. Mixing materials: mixing the powdery frozen radioactive waste liquid formed in step S2 with low-temperature glass frit (melting point is 600° C.) to obtain a premixed material;

[0063] S4. freeze-drying: the premix obtained in step S3 is 0.1~1×10 -3 Under a Pa vacuum environment, first dry at a temperature below 0°C for about 10 hours, then control the temperature at 30°C, and continue drying for 20 hours to obtain a dry mix...

Embodiment 3

[0068] A method for vitrification of radioactive waste liquid, comprising the steps of:

[0069] S1. Freezing of radioactive waste liquid: After stirring the formed radioactive waste liquid evenly, it is frozen in a low temperature environment of -5°C to form a frozen body of radioactive waste liquid;

[0070] S2. Frozen body crushing: crush the radioactive waste liquid frozen body formed in step S1 at a low temperature of -5°C, and crush it into a powder with a particle size ranging from 1 to 100um to form a powdery radioactive waste liquid frozen body ;

[0071] S3. Mixing materials: mixing the powdery frozen radioactive waste liquid formed in step S2 with low-temperature glass frit (melting point is 450° C.) to obtain a premixed material;

[0072] S4. freeze-drying: the premix obtained in step S3 is 0.1~1×10 -3 Under a Pa vacuum environment, first dry at a temperature below 0°C for about 10 hours, then control the temperature at 55°C, and continue drying for 15 hours to o...

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Abstract

The invention relates to the technical field of radioactive waste treatment and disposal, and discloses a radioactive waste liquid glass curing method which comprises the following steps: S1, freezing radioactive waste liquid to form a radioactive waste liquid frozen body; s2, crushing the radioactive waste liquid frozen body formed in the step S1 to form a powdery radioactive waste liquid frozen body; s3, mixing the powdery radioactive waste liquid frozen body formed in the step S2 with glass base material powder to obtain a premix; s4, carrying out freeze drying on the premix obtained in the step S3 to obtain a dried mixed powder material; and S5, melting the mixed powder material subjected to freeze drying in the step S4 to form a glass solidified body. The radioactive waste liquid glass curing treatment technology provided by the invention is simple in process flow, high in equipment operability, low in energy consumption and higher in safety and stability of the glass curing body, realizes low-temperature safe and efficient glass curing treatment of the radioactive waste liquid, and has extremely high application prospects and social and economic benefits.

Description

technical field [0001] The invention relates to the technical field of radioactive waste treatment and disposal, in particular to a vitrification method for radioactive waste liquid. Background technique [0002] Nuclear energy has become an important strategic energy source because of its cleanliness and high efficiency. During the development of nuclear energy and the operation of nuclear facilities, a large amount of radioactive waste will be generated. Because its radioactivity will endanger the environment and ecological safety, it needs to be safely disposed of. Liquid radioactive waste (medium-low and high-level radioactivity) is the largest and most complex radioactive product in radioactive waste. Due to its instability, radioactive waste liquid needs to be processed to form a stable solidified body, and the solidified body will eventually enter the underground disposal site for permanent disposal to achieve safe isolation from the ecological circle. The treatment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F9/16G21F9/30G21F9/36
CPCG21F9/162G21F9/305G21F9/36
Inventor 王烈林谢华丁聪聪唐梅
Owner SOUTHWEAT UNIV OF SCI & TECH
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