Concentration method for nuclear-pure uranyl nitrate solution

A technology of uranyl nitrate and solution, applied in the field of uranium purification, can solve the problems of increased enterprise burden and high steam operation cost

Inactive Publication Date: 2017-11-17
THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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Problems solved by technology

Regardless of whether it is single-effect evaporation or multi-effect evaporation, the heat source of evaporation operation mainly adopts a steady stream of raw steam. For materials with low concentration and large processing capacity, the en

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  • Concentration method for nuclear-pure uranyl nitrate solution

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Embodiment Construction

[0076] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0077] Such as figure 1 Shown, a kind of enrichment method for nuclear pure grade uranyl nitrate solution of the present invention comprises the following steps:

[0078] (1) Determine the system used in this method

[0079] The system used in the method includes a feed unit, a primary nanofiltration unit, a secondary nanofiltration unit, and a reverse osmosis unit;

[0080] 1. The feeding unit includes raw liquid tank, raw liquid pump and feeding tank;

[0081] After the uranyl nitrate solution is sampled and analyzed, it is poured into the stock solution tank, and a manual valve is set at the bottom of the stock solution tank;

[0082] When starting to concentrate, open the manual valve at the bottom of the stock solution tank, and the uranyl nitrate solution enters the feed tank through the stock soluti...

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Abstract

The invention belongs to the field of uranium purification, and concretely relates to a concentration method for a uranyl nitrate solution. The method comprises the following steps: 1, determining a system used by the method; 2, carrying out water test; 3, verifying the performances of membranes; 4, carrying out nanofiltration membrane concentration; and 5, carrying out reverse osmosis membrane concentration. The method has the advantages of simplicity in membrane separation concentration technology and device, normal temperature operation, no chemical reaction, low energy consumption, cleanness and no pollution.

Description

technical field [0001] The invention belongs to the field of uranium purification, in particular to a method for concentrating uranyl nitrate solution. Background technique [0002] When uranyl nitrate undergoes pyrolysis denitration reaction, it needs to absorb a large amount of heat, which makes the heat load of the denitration fluidized bed reactor very large. In order to reduce the heat required for pyrolysis and denitrification and reduce the heating power of the reaction equipment, it is necessary to concentrate the uranyl nitrate solution with a low uranium concentration to increase the uranium concentration of the solution. At present, the uranyl nitrate enrichment process of the domestic spent fuel reprocessing plant adopts single-effect evaporation, and the externally heated evaporator is the key equipment. In the field of uranium purification and conversion, the enrichment process uses multiple-effect evaporation technology. Regardless of whether it is single-ef...

Claims

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Application Information

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IPC IPC(8): B01D61/58B01D65/10C02F1/44
CPCB01D65/10C02F1/441C02F1/442C02F2101/006B01D61/026
Inventor 李天福马治军张慧忠魏刚陈建勇高兴星李子云李贺成王晓东
Owner THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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