Carbon-coated lithium orthosilicate tritium breeding agent and preparation method and preparation device system thereof

A tritium breeding agent and coating device technology, applied in the field of nuclear fusion, can solve the problems of cladding material corrosion, low release efficiency, and easy peeling off of the coating, and achieve uniform coating, simple method, and improved safety Effect

Inactive Publication Date: 2021-01-05
中科院过程工程研究所南京绿色制造产业创新研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as the service time increases, due to the large thermal stress between the oxide and the RAFM steel substrate, the coating is easy to fall off
[0005] CN108550404A discloses a kind of fluid state tritium breeding ceramic composite material, said fluid state tritium breeding ceramic composite material is formed by mixing liquid and solid two phases, which can eliminate the magnetohydrodynamics of existing liquid metal or molten salt tritium breeding agent The resistance effect and the corrosion effect on the cladding structure material can also eliminate the problems of low tritium release efficiency, low heat transfer, fragility, and blockage of the carrier gas channel caused by lithium volatilization.
However, the invention also has the problem that lithium titanate ceramic balls are in direct contact with the cladding material during use, which is likely to cause corrosion of the cladding material

Method used

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  • Carbon-coated lithium orthosilicate tritium breeding agent and preparation method and preparation device system thereof
  • Carbon-coated lithium orthosilicate tritium breeding agent and preparation method and preparation device system thereof
  • Carbon-coated lithium orthosilicate tritium breeding agent and preparation method and preparation device system thereof

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Effect test

Embodiment 1

[0050] This embodiment provides a C-coated Li 4 SiO 4 The preparation method of tritium multiplying agent, described preparation method provided in the present invention such as figure 1 Carry out in the shown device system, described preparation method comprises the following steps:

[0051] (1) Spherical Li with a particle size of 0.6mm 4 SiO 4 The particles are in a fluidized state in the protective atmosphere of argon;

[0052] (2) On the basis of continuing in step (1), pass carbon source gas methane into Li 4 SiO 4 In the protective atmosphere where the particles are located, the mixing temperature is 800°C, and the mixing time is 30 minutes; the gas flow rate of the carbon source gas is 125mL / min;

[0053] (3) C-coated Li was obtained after gravity sedimentation 4 SiO 4 Tritium breeder.

[0054] figure 2 The obtained C-coated Li by the preparation method provided by this embodiment 4 SiO 4 The EDS diagram of the tritium breeder, in which the C content reach...

Embodiment 2

[0058] This embodiment provides a C-coated Li 4 SiO 4 The preparation method of tritium multiplying agent, described preparation method provided in the present invention such as figure 1 Carry out in the shown device system, described preparation method comprises the following steps:

[0059] (1) Make spherical Li with an average particle size of 0.9mm 4 SiO 4 The particles are in a fluidized state in a protective atmosphere of nitrogen;

[0060] (2) On the basis of continuing in step (1), pass carbon source gas ethane into Li 4 SiO 4 In the protective atmosphere where the particles are located, the mixing temperature is 700°C, and the mixing time is 45 minutes; the gas flow rate of the carbon source gas is 160mL / min;

[0061] (3) C-coated Li was obtained after centrifugal sedimentation 4 SiO 4 Tritium breeder.

[0062] The obtained C-coated Li of the present embodiment 4 SiO 4 The C film thickness of the tritium breeder was 2.5 nm, and the resulting C coated Li 4 ...

Embodiment 3

[0064] This embodiment provides a C-coated Li 4 SiO 4 The preparation method of tritium multiplying agent, described preparation method provided in the present invention such as figure 1 Carry out in the shown device system, described preparation method comprises the following steps:

[0065] (1) Spherical Li with a particle size of 0.3mm 4 SiO 4 Particles are in a fluidized state in a protective atmosphere of helium;

[0066] (2) On the basis of continuing in step (1), pass carbon source gas ethylene into Li 4 SiO 4 In the protective atmosphere where the particles are located, the mixing temperature is 600°C, and the mixing time is 15 minutes; the gas flow rate of the carbon source gas is 85mL / min;

[0067](3) After filtration, C-coated Li 4 SiO 4 Tritium breeder.

[0068] The obtained C-coated Li of the present embodiment 4 SiO 4 The C film thickness of the tritium breeder was 1.5 nm, and the resulting C coated Li 4 SiO 4 The elemental composition and microscopi...

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Abstract

The invention provides a C-coated Li4SiO4 tritium breeding agent and a preparation method and a preparation device system thereof. The preparation method comprises the following steps: (1) enabling Li4SiO4 particles to be in a fluidized state in a protective atmosphere; (2) on the basis that the step (1) is continuously carried out, mixing Li4SiO4 particles and carbon source gas; and (3) carryingout gas-solid separation to obtain the C-coated Li4SiO4 tritium breeding agent. The preparation device system comprises a stock bin, a fluidized bed coating device, a tail gas treatment device and a product collection device. The corrosion of Li4SiO4 to a cladding material is overcome, and meanwhile, the stability of the lithium-based ceramic tritium breeding agent in a He-H2/H2O environment is improved.

Description

technical field [0001] The invention belongs to the field of nuclear fusion technology, and relates to a preparation method of an advanced lithium-based ceramic tritium multiplier with a core-shell structure, in particular to a C-coated Li 4 SiO 4 Tritium breeder and its preparation method and preparation device system. Background technique [0002] With the continuous growth of the world's energy demand, the consumption rate of fossil energy on the earth is accelerating, and it will only be used by human beings for another two to three hundred years, which has also brought a series of increasingly prominent environmental problems. Nuclear fusion energy has obvious advantages in terms of energy storage, cleanliness and environmental protection, and is one of the most promising ways for human beings to completely solve energy problems. However, the tritium fuel required for nuclear fusion is less abundant in nature and must be bombarded with neutrons. 6 Li's material acqui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/32G21B1/11
CPCC01B33/325G21B1/11Y02E30/10
Inventor 向茂乔朱庆山郑婕岳芬
Owner 中科院过程工程研究所南京绿色制造产业创新研究院
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