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Membrane treatment process for purifying uranium-containing waste liquid

A membrane treatment and waste liquid technology, applied in the field of uranium conversion, can solve problems such as failure to meet discharge standards, and achieve the effects of less secondary waste, simple system and low energy consumption

Inactive Publication Date: 2017-12-12
THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] (2) After ion exchange adsorption treatment, the uranium content in the waste liquid can be reduced to about 1.0mg / L, which cannot meet the discharge standard

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Embodiment Construction

[0060] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0061] Such as figure 1 As shown, a membrane treatment process for purifying uranium-containing waste liquid of the present invention comprises the following steps: (1) establishing a membrane treatment and purification system for uranium-containing waste liquid

[0062] Uranium-containing waste liquid membrane treatment and purification system includes pretreatment devices, microfiltration devices, ultrafiltration devices, nanofiltration devices, and reverse osmosis devices;

[0063] 1. The pretreatment device includes raw liquid tank, raw material pump, disc filter, bag filter;

[0064] The raw liquid tank is used to receive uranium-containing waste liquid generated during the production process of uranium purification and conversion for sampling;

[0065] After sampling in the stock solution tank, open the manua...

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Abstract

The invention belongs to the field of uranium conversion, and particularly relates to a membrane purification treatment process for uranium-containing process waste liquid generated in a production process of uranic fluoride. The membrane purification treatment process comprises the following steps: (1) establishing a uranium-containing waste liquid treatment purification system; (2) carrying out pretreatment; (3) carrying out ultrafiltration; (4) carrying out nanofiltration; and (5) carrying out reverse osmosis. By establishment of the membrane purification treatment system for the uranium-containing waste liquid, after the uranium-containing waste liquid of which the uranium concentration is about 200-800 mg / L in a uranium purification and conversion system is separated by a nanofiltration unit (under the operation pressure of 0.3 MPa) and a reverse osmosis unit (under the operation pressure of 1.0 MPa), the concentration of uranium in permeate can be reduced to be 0.05 mg / L or below, and therefore the permeate reaches the emission standard. In addition, the membrane treatment technology has the advantages of low energy consumption, simple system, less secondary wastes and the like.

Description

technical field [0001] The invention belongs to the field of uranium conversion, and in particular relates to a membrane purification treatment process for producing uranium-containing process waste liquid in the production process of uranium hexafluoride. Background technique [0002] During the process of uranium purification and transformation to produce natural UF6, the process waste liquid usually still contains 200mg / L~800mg / L metal uranium. Therefore, the purification treatment of process waste liquid needs to recover metal uranium as much as possible to prevent uranium from polluting the environment. [0003] At present, domestic and foreign to UF 6 There are two main treatment measures for alkaline uranium-containing waste liquid generated in the production process: one is to use ion exchange method for exchange adsorption treatment. The second is to use Ca(OH) 2 Alkalization, FeSO 4 Neutralization and final addition of precipitating agent are used for treatment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/58C02F1/44
CPCB01D61/58C02F1/441C02F1/442C02F1/444
Inventor 李天福张慧忠魏刚马治军陈建勇任喜彦李贺成高兴星李立璟
Owner THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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