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Process method and device for recycling nitric acid from uranium-bearing wastewater

A process method and technology of nitric acid, applied in the directions of nitric acid, nitrogen oxides/oxyacids, fractionation, etc., can solve problems such as explosion of red oil

Active Publication Date: 2017-05-10
THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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Problems solved by technology

[0003] However, because the uranium-containing acidic waste liquid produced after extraction will contain a certain amount of TBP, directly evaporating and concentrating these waste liquids, there is a risk of "red oil explosion", so there is an urgent need for a method that can reduce production and operation costs. , environmental protection, emission reduction, and safe operation process for recovering nitric acid from uranium-containing acidic waste liquid

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  • Process method and device for recycling nitric acid from uranium-bearing wastewater

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Embodiment Construction

[0043] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0044] According to the technical scheme of nitric acid recovery in uranium-containing waste liquid, combined with the physical and chemical properties of nitric acid aqueous solution, the technical route of nitric acid recovery in uranium-containing waste liquid and the devices embodied are as follows: figure 1 shown.

[0045] A process for recovering nitric acid in uranium-containing waste liquid of the present invention comprises the following steps;

[0046] (1) The concentration of nitric acid produced in the uranium purification production is 1.0mol / L-2mol / L, and the uranium-containing acidic waste liquid with a uranium concentration of 0.01-0.10g / L enters the header tank,

[0047] A side feed port is set up at a horizontal height of 12000mm from the horizontal plane of the rectification tower;

[0048] The l...

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Abstract

The invention belongs to the technical field of nitric acid recycling processes, in particular to a process method and device for recycling nitric acid from uranium-bearing wastewater in uranium purifying-transforming and nuclear fuel posttreatment industry. According to the process method for recycling the nitric acid by rectifying under a reduced pressure, the nitric acid and water in the uranium-bearing wastewater are recycled, so that waste of the nitric acid is avoided, the volume of the wastewater is reduced greatly, and the risks of excessive corrosion of equipment and explosion caused by red oil are lowered, thereby fulfilling the aims of lowering uranium purifying production cost, protecting the environment, reducing emission and improving operation security.

Description

technical field [0001] The invention belongs to the technological field of nitric acid recovery, in particular to a process method and a device for recovering nitric acid from uranium-containing waste liquid in uranium purification conversion and nuclear fuel post-processing industries. Background technique [0002] The purification process of natural uranium at home and abroad mainly includes "dry method" and "wet method". , to remove impurities through processes such as dissolution, extraction or ion exchange. In this process, a large amount of acidic uranium-containing waste liquid will be produced. At present, there are no reports on the recovery of nitric acid from uranium-containing acidic waste liquid in domestic and foreign uranium purification production plants. Literature shows that most of the radioactive nitric acid waste liquid produced in the reprocessing process in foreign reprocessing plants adopts evaporation and concentration technology to reduce the volume...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D3/14B01D3/32B01D3/42C01B21/46
CPCB01D3/14B01D3/32B01D3/42C01B21/46
Inventor 李振峰张凯黄建茹发全朱盈喜冯怀全杨校铃侯彦龙杜长斌郁鄯德
Owner THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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