Method for reducing oxygen content in halide molten salt

A technology of halide and oxygen content, applied in the preparation of fluoride, chloride, bromide, etc., can solve the problems of strong equipment corrosion, low treatment efficiency, long time consumption, etc., and achieve weak equipment corrosion and treatment. Efficient effect

Active Publication Date: 2021-06-04
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0008] The technical problem to be solved by the present invention is that the method for reducing the oxygen content in molten halide salts in the prior art has strong corrosiveness to equipment and low processing efficiency, especially when processing molten halide salts with high oxygen content time-consuming problem, and provides a method to reduce the oxygen content in molten halide salts

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  • Method for reducing oxygen content in halide molten salt
  • Method for reducing oxygen content in halide molten salt
  • Method for reducing oxygen content in halide molten salt

Examples

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Embodiment 1～5

[0107] The halide molten salt in embodiment 1, 3 and 4 is the self-made simulated molten salt reactor fuel carrier salt; The halide molten salt in embodiment 2 is the used halide molten salt of molten salt battery; Molten salt is the halide molten salt used in molten salt reactors.

[0108] Among the embodiments 1-5, the method for reducing the oxygen content in the halide molten salt comprises the following steps:

[0109] (1) After pulverizing the halide molten salt, under an inert atmosphere, fill the furnace cavity of the evaporation furnace body with inert gas, and place the pulverized halide molten salt in the evaporation crucible of the distillation equipment In, sealed;

[0110] (2) Set the vacuum degree of the distillation equipment;

[0111] (3) The distillation temperature, condensation temperature and distillation time of the distillation equipment are set, and the halide molten salt is distilled;

[0112] (4) After the distillation process is finished, the o...

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Abstract

The invention discloses a method for reducing oxygen content in a halide molten salt. The method comprises the following steps of: carrying out distillation treatment on the halide molten salt under a vacuum condition; wherein the vacuum degree of the vacuum condition is 10<-5>-10<3>Pa; in the distillation treatment, the distillation temperature is at least 200DEG C higher than the condensation temperature, and the distillation temperature is 400-1200DEG C. According to the method for reducing the oxygen content in the halide molten salt, the oxygen content in the halide molten salt can be effectively reduced by 70% or above; the oxygen content in the treated distillation product can be as low as 560mg / Kg or below, and even as low as 200mg / Kg or below; the treatment efficiency is high, and the corrosion to equipment is relatively weak.

Description

technical field [0001] The invention relates to a method for reducing the oxygen content in molten halide salts. Background technique [0002] Molten salt energy storage technology can be combined with solar thermal power generation systems to meet the peak-shaving needs of the power grid. Among them, halide molten salt has certain application potential. For example, chloride molten salt is cheap and has a large latent heat of phase change; fluoride molten salt has a high melting point, large latent heat of fusion, and good heat transfer performance. However, the halide may absorb water and deliquescence to generate oxygen during the production process, or may be polluted by oxygen during the storage process, so that the halide molten salt inevitably contains oxygen, and the corrosion of the halide molten salt with high oxygen content Sex will be significantly enhanced. [0003] In the research of nuclear power reactors, the dry reprocessing technology with molten salt as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D3/10B01D3/42C01B9/02C01B9/04C01B9/06C01B9/08
CPCB01D3/10B01D3/42C01B9/02C01B9/04C01B9/06C01B9/08
Inventor 耿俊霞窦强付海英李晴暖
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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