TiN/C coated lithium tritium orthosilicate breeding agent and preparation method and preparation device system thereof

Abstract

The invention provides a TiN / 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 the Li4SiO4 particles and carbon source gas to obtainC-coated Li4SiO4 particles; (3) on the basis that the step (1) is continuously carried out, mixing the C-coated Li4SiO4 particles obtained in the step (2), titanium source gas and nitrogen source gas;and (4) carrying out gas-solid separation to obtain the TiN / C coated Li4SiO4 tritium breeding agent. The device system comprises a stock bin, a fluidized bed coating device, a titanium source gasification device, a product collection device and a tail gas treatment 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 TiN / C-coated Li 4 SiO 4 Tritium breeder and its preparation method and preparation device system. Background technique [0002] Nuclear fusion energy has attracted more and more attention from humans due to its advantages of environmental protection, cleanliness, safety, and sustainability. Among them, deuterium-tritium fusion is considered to be one of the most easily realized reactions for humans. Deuterium is abundant in seawater and is very easy to obtain. However, tritium, as a non-naturally occurring isotope of hydrogen, must be obtained through a violent reaction between neutrons and lithium atoms under high temperature and high pressure environments. After decades of development, the current Li 4 SiO 4 Microspheres have been selected as on...

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Problems solved by technology

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

[0007] CN108550404A discloses a fluid tritium breeding ceramic composite material, the fluid tritium breeding ceramic composite material is formed by mixing liquid and solid phases, which can eliminate existing The magnetohydrodynamic resistance effect of some liquid metal or molten salt tritium breeders and the corrosion effect on the cladding structure materials can also eliminate the low efficiency of tritium release, low heat transfer, fragility and the carrier gas path caused by lithium volatilization Blockage and other problems

However, the cost of the invention is high, it is difficult to achieve large-scale mass production, and it is impossible to fundamentally avoid the element diffusion between the tritium breeder and the cladding material, and there is still the problem of cladding material corrosion in long-term use.

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