High-heat-conductivity metal-carbonate molten salt material and preparation method and application thereof

A carbonic acid molten salt, high thermal conductivity technology, applied in heat exchange materials, chemical instruments and methods, bulk chemical production, etc. Achieve the effect of overcoming unfavorable heat transfer, improving the thermal conductivity of high-temperature liquids, and improving thermal conductivity

Pending Publication Date: 2017-09-19
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the addition of solid particles or solid nanoparticles, when this type of composite molten salt is in operation for a long time, there is a defect that the solid / liquid separation will lose heat transfer enhancement characteristics due to solid particle agglomeration; area, which may lead to the risk of local overheating of the heat absorber or a decrease in the heat transfer efficiency of the heat exchanger or even blockage of the pipe

Method used

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  • High-heat-conductivity metal-carbonate molten salt material and preparation method and application thereof
  • High-heat-conductivity metal-carbonate molten salt material and preparation method and application thereof
  • High-heat-conductivity metal-carbonate molten salt material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A magnesium-carbonate molten salt heat transfer heat storage material, the preparation method is as follows:

[0040] Using pure salts of potassium carbonate, sodium carbonate and lithium carbonate extracted from salt lakes as raw materials, carbonate molten salt was prepared according to the composition and method provided in Example 7 of Chinese invention patent ZL200910037348.7.

[0041] Mix magnesium powder and carbonate molten salt according to 1.0:99.0 (mass ratio) and stir evenly, and statically heat to 650°C at a heating rate of 4°C / min under the protection of an inert atmosphere (argon) until the magnesium-molten salt is completely Melt, then keep warm for 12 hours, so that the added magnesium is evenly dispersed in the molten salt liquid in the form of "mist", then naturally cooled to 25 ° C, mechanically crushed and dried, and the magnesium-carbonate molten salt heat transfer and heat storage material is obtained.

[0042] Using a differential scanning calori...

Embodiment 2

[0046] A magnesium-carbonate molten salt heat transfer heat storage material, the preparation method is as follows:

[0047] Using pure salts of potassium carbonate, sodium carbonate and lithium carbonate extracted from salt lakes as raw materials, carbonate molten salt was prepared according to the composition and method provided in Example 7 of Chinese invention patent ZL200910037348.7.

[0048] Mix magnesium powder and carbonate molten salt according to 0.1:99.9 (mass ratio) and stir evenly, and statically heat to 650°C at a heating rate of 8°C / min under the protection of an inert atmosphere (argon) until the magnesium-molten salt is completely Melting, and then keeping warm for 10 hours, so that the added magnesium is evenly dispersed in the molten salt liquid in the form of "mist", then naturally cooled to 25 ° C, mechanically crushed and dried, and the magnesium-carbonate molten salt heat transfer and heat storage material is obtained.

[0049] The measuring method is th...

Embodiment 3

[0051] A magnesium-carbonate molten salt heat transfer heat storage material, the preparation method is as follows:

[0052] Using pure salts of potassium carbonate, sodium carbonate and lithium carbonate extracted from salt lakes as raw materials, carbonate molten salt was prepared according to the composition and method provided in Example 7 of Chinese invention patent ZL200910037348.7.

[0053] Mix magnesium powder and carbonate molten salt according to 1.5:98.5 (mass ratio) and stir evenly, and statically heat to 650°C at a heating rate of 5°C / min under the protection of an inert atmosphere (argon) until the magnesium-molten salt is completely Melting, and then keeping it warm for 14 hours, so that the added magnesium is evenly dispersed in the molten salt liquid in the form of "mist", and then naturally cooled to 40°C, mechanically crushed and dried, and the magnesium-carbonate molten salt heat transfer and heat storage material is obtained.

[0054] The test method is th...

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Abstract

The invention discloses a high-heat-conductivity metal-carbonate molten salt material and a preparation method and application thereof; the high-heat-conductivity metal-carbonate molten salt material comprises, by weight, 0.05-2.6% of magnesium powder, and 97.4-99.95% of carbonate molten salt. The high-heat-conductivity metal-carbonate molten salt material has significantly improved heat conduction coefficient of high-liquid liquid, maintains low melting point and high specific heat capacity in carbonate molten salt, and has higher heat-conducting and heat-storing properties; the magnesium added is in 'mist' uniform distribution in the carbonate molten salt, and the 'mist' state is not affected by repeated cooling/heating conditions. The applicable range of the molten salt is further widened to the field of renewable energy sources and high-temperature industrial waste heat recovery, and the material has a promising application prospect in terms of comprehensive development and utilization of saline lake resources.

Description

technical field [0001] The invention belongs to the field of large-scale utilization of renewable energy and thermal energy storage and transmission, and in particular relates to a metal-carbonate molten salt material with high thermal conductivity and its preparation method and application. Background technique [0002] The large-scale utilization of renewable energy and high-efficiency energy storage and transmission technology, as strategic energy technologies supporting the sustainable development of my country's national economy, are included in the Medium and Long-Term Development Plan for Renewable Energy and the Twelfth Five-Year Plan for Energy Development. It is the direction of priority development. High-efficiency heat transfer and heat storage technology can effectively solve the intermittent and unstable problems of energy supply in the process of large-scale utilization of solar energy and recovery of industrial waste heat, and can effectively improve energy co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/12
CPCC09K5/12Y02P20/54
Inventor 魏小兰丁静田禾青王维龙黄成龙杜丽婵
Owner SOUTH CHINA UNIV OF TECH
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