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A fluidized bed device for preparing uranium nitride and method of using the same

A fluidized bed, uranium nitride technology, applied in the field of nuclear engineering, can solve the problems of less research on special equipment, and achieve the effect of thorough exhaust gas disposal and high reaction yield

Active Publication Date: 2022-07-08
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above research mainly focuses on method research, and there are few researches on special equipment for the preparation of uranium nitride, and all of them are intermittent production equipment.

Method used

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  • A fluidized bed device for preparing uranium nitride and method of using the same
  • A fluidized bed device for preparing uranium nitride and method of using the same
  • A fluidized bed device for preparing uranium nitride and method of using the same

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Embodiment 1

[0031] A fluidized bed device for preparing uranium nitride, comprising a gas system 1, a material mixing system 2, a low temperature fluidized bed 3, a high temperature fluidized bed 4, a tail gas treatment device 5 and an absorption tower 6; the gas system 1 It is connected with the low temperature fluidized bed 3 and the high temperature fluidized bed 4 respectively, the mixing system 2 is connected with the low temperature fluidized bed 3, the low temperature fluidized bed 3 is connected with the high temperature fluidized bed 4, and the low temperature fluidized bed 3. The high temperature fluidized bed 4 is respectively connected with the tail gas treatment device 5 , and the tail gas treatment device 5 is connected with the absorption tower 6 .

[0032] In this example, the reaction steps are controlled to be carried out in a low-temperature fluidized bed and a high-temperature fluidized bed respectively, so as to ensure the smooth progress of the reaction under differen...

Embodiment 2

[0046] In order to achieve the above purpose, the present embodiment also provides a method for using a fluidized bed device for preparing uranium nitride, comprising the following steps:

[0047] S1, UO 2 with NH 4 HF 2 In molar ratio 1:4~1:8 or U 3 O 8 with NH 4 HF 2 At a molar ratio of 1:12 to 1:24, put it into a mixing device, and mix and grind in the mixing device for 30-60 minutes to obtain ground powder particles;

[0048] S2. Pour argon into the low-temperature fluidized bed, and repeat the cleaning 3 times;

[0049] S3, the ground powder particles after mixing and grinding are transferred to the low temperature fluidized bed, heated to 20-125 ° C by the first heating device and the first temperature control sensor, and reacted for 3-12 hours to obtain the reaction product;

[0050] S4, transfer the reaction product to the high temperature fluidized bed, pass Ar, NH 3 , N 2 , H 2 The combined gas mixture is heated to 700-1000 ℃ by the second heating device an...

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Abstract

The invention provides a fluidized bed device for preparing uranium nitride, including a gas system, a material mixing system, a low temperature fluidized bed, a high temperature fluidized bed, a tail gas treatment device and an absorption tower; the gas system is connected to a low temperature fluidized bed. The fluidized bed and the high temperature fluidized bed are respectively connected, the mixing system is connected with the low temperature fluidized bed, the low temperature fluidized bed is connected with the high temperature fluidized bed, and the low temperature fluidized bed and the high temperature fluidized bed are respectively connected with the tail gas treatment The device is connected, and the tail gas treatment device is connected with the absorption tower. The present invention also provides a method for using the fluidized bed device for preparing uranium nitride. By controlling the reaction steps to be carried out in the low temperature fluidized bed and the high temperature fluidized bed respectively, the invention ensures the smooth progress of the reaction under different temperature requirements; the tail gas is purified in the tail gas treatment device to ensure that the discharged gas is harmful to the environment No pollution. The invention can ensure high reaction yield of uranium nitride preparation and complete exhaust gas disposal.

Description

technical field [0001] The invention relates to the technical field of nuclear engineering, in particular to a fluidized bed device for preparing uranium nitride and a method for using the same. Background technique [0002] Nuclear energy is a clean, efficient and safe energy source, and currently occupies an important position in the world's energy structure. In recent years, with the development of the nuclear industry, various advanced reactors have been extensively studied. The gradual miniaturization of the reactor, the long refueling period and the cooling of metals, etc., constantly put forward new requirements for the nuclear fuel as the core material of the reactor: high melting point, high thermal conductivity, high atomic density of heavy metals, compatibility with cladding materials and coolants High and low expansion, low fission gas release and manufacturability, i.e. good fuel breeding properties, high thermal conductivity, high thermal stability, good chemi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/26B01F33/80B01D53/68B01D53/58B01D53/18B01D53/30C01B21/06G21C3/58
CPCB01J8/26B01J8/1872B01J8/1836B01D53/68B01D53/58B01D53/18B01D53/30C01B21/063G21C3/58B01J2208/00061B01J2208/00884B01D2257/2047B01D2251/404B01D2251/304B01D2251/604B01D2251/502B01F33/80B01F33/8362B01F33/83613Y02E30/30
Inventor 孙永菊梅华平李桃生
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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