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Method for deeply purifying and recovering hyperhaline fluoric-u radioactive waste solution

A radioactive waste liquid, deep purification technology, applied in radioactive purification, chemical instruments and methods, water/sludge/sewage treatment, etc.

Active Publication Date: 2015-08-12
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the defects of the existing fluorine-containing and uranium-containing waste liquid treatment methods and methods, and provide a method for efficiently and quickly treating high-salt fluorine-containing-uranium waste liquid and recycling uranium

Method used

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  • Method for deeply purifying and recovering hyperhaline fluoric-u radioactive waste solution

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Example 1 High-salt fluorine-containing uranium radioactive wastewater with an initial influent salt content of 8%, an initial uranium concentration of 900 mg / L, and a fluorine concentration of 15 g / L enters a high-salt fluorine-containing uranium wastewater of the present invention The deep purification and recovery method of (liquid), which includes three processing sections of pretreatment A, enrichment and separation of uranium-fluorine B and recovery of uranium C in sequence. The salt content in the final wastewater after treatment is ≤0.1%, the uranium concentration is - ≤10mg / L.

[0031] ①Pretreatment A The pretreatment section includes low-temperature volume reduction separation, chemical sedimentation and membrane filtration units connected in sequence. The low-temperature treatment temperature of the low-temperature volume reduction separation unit is -70°C and the treatment time is 2 hours; The agent is soluble phosphate, uranium: phosphate=20:1 (mass concent...

Embodiment 2

[0034] Example 2 The fluorine-uranium-containing radioactive wastewater with an initial influent salt content of 2%, an initial uranium concentration of 800 mg / L, and a fluorine concentration of 8 g / L enters a high-salt fluorine-containing-uranium wastewater of the present invention (liquid ) deep purification and recovery method, which includes three processing sections of pretreatment A, enrichment and separation of uranium-fluorine B and recovery of uranium C in sequence. The salt content in the final wastewater after treatment is ≤0.1%, the uranium concentration is - ≤10mg / L.

[0035] ①Pretreatment A The pretreatment section includes low temperature volume reduction separation, chemical sedimentation and membrane filtration units connected in sequence, in which the low temperature treatment temperature of the low temperature volume reduction separation unit is -25°C, and the low temperature treatment time is 0.5h; The precipitating agent is soluble vanadate, uranium: vanad...

Embodiment 3

[0038] Example 3 High-salt fluorine-containing uranium radioactive wastewater with an initial influent salt content of 4%, an initial uranium concentration of 500 mg / L, and a fluorine concentration of 5 g / L enters a high-salt fluorine-containing uranium wastewater of the present invention The deep purification and recovery method of (liquid), which includes three processing sections of pretreatment A, enrichment and separation of uranium-fluorine B and recovery of uranium C in sequence. The salt content in the final wastewater after treatment is ≤0.1%, the uranium concentration is - ≤10mg / L.

[0039] ①Pretreatment A The pretreatment section includes low temperature volume reduction separation, chemical sedimentation and membrane filtration units connected in sequence, in which the low temperature treatment temperature of the low temperature volume reduction separation unit is -50°C, and the low temperature treatment time is 1.5h; The precipitating agent is soluble silicate, ur...

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Abstract

The invention discloses a method for deeply purifying and recovering hyperhaline fluoric-U radioactive waste solution. The method comprises three sequent treatment phases including pretreatment, enrichment and separation of U-F and recovery of U, and can be further finely divided into 7 treatment units, including lower temperature reduction separation, chemical sedimentation, film filtering, step-grade organism enrichment-film filtering separation or step ion exchange, deposit fluorine removal solid-liquid separation, microwave tower treatment and resource recovery of U; under the condition that the salinity of waste solution to be treated is 0.1-10%, the initial U concentration is 0.1-1000mg / L, and the fluorine concentration is 0.01-15g / L, after treatment, the concentration of U is not larger than 0.05mg / L, the concentration of the fluorine is not higher than 10mg / L, and the recovery rate of U is larger than 90%. The method for deeply purifying and recovering hyperhaline fluoric-U radioactive waste solution is suitable for treating hyperhaline fluoric-U radioactive waste solution and the resource recovery of radioactive U.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a deep purification and recovery method of high-salt fluorine-uranium radioactive waste liquid, which is mainly used for removing inorganic salts in waste water, removing uranium and fluorine in waste water, and treating uranium Recycling. Background technique [0002] Uranium and its compounds are one of the important raw materials in the nuclear industry and the basis for nuclear power applications and military nuclear weapons. Therefore, the sustainable development of uranium resources is very necessary, and the prevention and control of environmental pollution in the mining and utilization of uranium resources is the key . During the mass production and utilization of uranium resources, the types and quantities of uranium-containing wastewater produced are increasing, and the potential threats to human health and the natural ecological environment are increasing day b...

Claims

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Application Information

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IPC IPC(8): G21F9/12C02F9/14
CPCC02F1/42C02F1/44C02F1/52C02F1/5272C02F1/542C02F1/545C02F3/34C02F9/00G21F9/12G21F9/125
Inventor 董发勤秦永莲聂小琴王彬郭玉婷覃贻琳王孝强
Owner SOUTHWEAT UNIV OF SCI & TECH
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