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Method for treating uranium-containing waste water

A treatment method and waste water technology, applied in water/sewage multi-stage treatment, neutralized water/sewage treatment, water/sludge/sewage treatment, etc., can solve the difficulties of ion exchanger regeneration and disposal, and high raw water quality requirements , The removal rate is not ideal, etc., to achieve the effect of easy operation, good removal effect, and large decontamination multiple

Inactive Publication Date: 2009-12-09
NANHUA UNIV
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AI Technical Summary

Problems solved by technology

The disadvantage of the ion exchange method is that it has high requirements on the quality of raw water; for the treatment of wastewater containing high concentrations of competing ions, it is often necessary to use a secondary ion exchange column, or to attach electrodialysis equipment in front of the ion exchange column to remove constant competition. Ions; regeneration and disposal of ion exchangers are difficult
The disadvantages of the membrane treatment method are: the compatibility of the membrane is related to many factors such as the size of the pores, the pH value of the water, and the temperature, and the investment cost is relatively high. In some cases, it is easy to scale, making this method difficult to popularize and apply.
However, it has been found through tests that magnesium hydroxide is only effective in treating low-concentration uranium-containing wastewater with a uranium concentration of ≤ 1mg / L. This method is not suitable for uranium-containing wastewater higher than 10mg / L. Large, the removal rate is not ideal

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  • Method for treating uranium-containing waste water
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Effect test

Embodiment 1

[0059] Embodiment 1, a treatment method for uranium-containing wastewater, the concentration of uranium in the uranium-containing wastewater is 0.1-1000 mg·L -1 , its technological process is as follows:

[0060] 1. Dosing uranium removal agent

[0061] Potassium dihydrogen phosphate is directly added to the uranium removal pool 1 of the uranium-containing wastewater according to the mass concentration ratio: uranium:potassium dihydrogen phosphate=2~20:1;

[0062] 2. Stirring treatment

[0063] In the uranium removal pool 1, the uranium-containing wastewater added with potassium dihydrogen phosphate is stirred using the stirrer 6, and the stirring parameters are: stirring time 30min, stirring speed 250-300rpm, stirring temperature 10-30°C;

[0064] 3. Settlement treatment

[0065] After stirring, the uranium-containing wastewater in the uranium removal pool 1 is subjected to sedimentation treatment, and polyacrylamide or polyferric sulfate is added in a ratio of 1:800-1000;...

Embodiment 2

[0078] Embodiment 2, a treatment method for uranium-containing wastewater, the uranium concentration of the uranium-containing wastewater is 0.1-1000 mg·L -1 , its technological process is as follows:

[0079] 1. Dosing uranium removal agent

[0080] The sodium dihydrogen phosphate is directly added to the uranium removal pool 1 of the uranium-containing wastewater according to the mass concentration ratio: uranium: sodium dihydrogen phosphate=2~20:1;

[0081] 2. Stirring treatment

[0082] In the uranium removal pool 1, the uranium-containing wastewater added with sodium dihydrogen phosphate is stirred using the stirrer 6. The stirring parameters are: stirring time 30min, stirring speed 250-300rpm, stirring temperature 10-30°C;

[0083] 3. Settlement treatment

[0084] After stirring, the uranium-containing wastewater in the uranium removal pool 1 is subjected to sedimentation treatment, and polyacrylamide or polyferric sulfate is added in a ratio of 1:800-1000;

[0085] ...

Embodiment 3

[0097] Embodiment 3, a treatment method for uranium-containing wastewater, the uranium concentration of the uranium-containing wastewater is 0.1-1000 mg·L -1 , its technological process is as follows:

[0098] 1. Dosing uranium removal agent

[0099] Potassium hydrogen phosphate is directly added to the uranium removal pool 1 of the uranium-containing wastewater according to the mass concentration: uranium:potassium hydrogen phosphate=2~20:1;

[0100] 2. Stirring treatment

[0101] In the uranium removal pool 1, the uranium-containing wastewater added with potassium hydrogen phosphate is stirred using the stirrer 6, and the stirring parameters are: stirring time 30min, stirring speed 250-300rpm, stirring temperature 10-30°C;

[0102] 3. Settlement treatment

[0103] After stirring, the uranium-containing wastewater in the uranium removal pool 1 is subjected to sedimentation treatment, and polyacrylamide or polyferric sulfate is added in a ratio of 1:800-1000;

[0104] 4. S...

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Abstract

A method for treating uranium-containing waste water comprises uranium removal and phosphorus removal two techniques, firstly adding uranium removing agent in a uranium removal tank of uranium-containing waste water according to that the mass concentration ratio of uranium to uranium removing agent is 2-20 to 1, stirring and settling the uranium-containing waste water in the uranium removal tank, processing solid-liquid separation to the flocculated waste water through plate sedimentation tank to remove the uranium in the uranium-containing waste water, so that the uranium removal reaches up to 99%, and then, adding lime milk clarifying solution in the flocculation basin, stirring, settling and solid-liquid separation to remove the phosphorus in the waste water, in which the phosphorus removal reaches up to 99.99%. At last, supernatant is added with acid to regulate the pH value to 6 to 9 in the regulating tank.

Description

technical field [0001] The invention relates to a treatment method for radioactive waste water, in particular to a treatment method for uranium-containing waste water. Background technique [0002] At present, radioactive elements have been widely used in military, energy, industry, agriculture, medicine and other scientific research. At the same time, the amount of radioactive waste gas, waste liquid and solid waste produced during the whole development and utilization process is increasing, and the hazards are also increasing, which cannot but arouse people's deeper concern. Among the radioactive "three wastes", the total amount of radioactivity contained in radioactive wastewater accounts for a considerable proportion of the total amount of original radioactive waste, so special attention should be paid to its treatment. [0003] As an important radioactive element, uranium releases alpha rays, which can cause radioactive radiation damage to the human body. Through drin...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/66C02F1/56C02F101/10
Inventor 丁德馨李光悦聂小琴胡南公新忠陈祥王永东刘玉龙王有团
Owner NANHUA UNIV
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