Method for preparing ternary nitric acid molten salt phase change heat storage material

A phase-change heat storage material and molten salt technology are applied in heat exchange materials, chemical instruments and methods to achieve the effects of low preparation cost, easy realization and simple preparation method.

Active Publication Date: 2016-03-23
辽宁卓仑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Molten salt phase-change heat storage materials have been tested and applied in the field of solar thermal power generation abroad for nearly 30 years, but domestic solar thermal power plants that use mixed molten salt as heat absorption and heat storage media have not yet been put into operation

Method used

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  • Method for preparing ternary nitric acid molten salt phase change heat storage material
  • Method for preparing ternary nitric acid molten salt phase change heat storage material
  • Method for preparing ternary nitric acid molten salt phase change heat storage material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Weigh sodium nitrate, potassium nitrate and neodymium nitrate respectively according to the mass ratio of 54:45:1; wherein, the purity of sodium nitrate, potassium nitrate and salt neodymium nitrate are all greater than 99%, and the sum of impurity ions is less than 1%; the weighed Sodium nitrate is put into mortar, adopts mechanical grinding mode to grind 35min, waits to pass through sieve (average aperture of sieve is 1mm) after grinding, obtains sodium nitrate powder; Grind in a mortar for 35 min, and pass through a sieve (the average aperture of the sieve is 1 mm) after the grinding is completed to obtain potassium nitrate powder; put the neodymium nitrate taken into a mortar, grind for 35 min in a mechanical grinding mode, and pass through a sieve ( The average aperture of the sieve is 1 mm) to obtain neodymium nitrate powder; the sodium nitrate powder, potassium nitrate powder and neodymium nitrate powder are placed in a vacuum drying oven for drying independently,...

Embodiment 2

[0056] Weigh sodium nitrate, potassium nitrate and neodymium nitrate respectively according to the mass ratio of 53:44:3; wherein, the purity of sodium nitrate, potassium nitrate and salt neodymium nitrate are all greater than 99%, and the sum of impurity ions is less than 1%; the weighed Sodium nitrate is put into mortar, adopts mechanical grinding mode to grind 40min, passes through sieve (average aperture of sieve is 2mm) after grinding, obtains sodium nitrate powder; Grind for 40min, pass through a sieve (the average aperture of the sieve is 2mm) after the completion of the grinding, and obtain potassium nitrate powder; put the neodymium nitrate taken by weight into a mortar, grind for 40min by mechanical grinding, pass through a sieve (sieve) after the completion of the grinding The average pore diameter is 2mm), to obtain neodymium nitrate powder; the sodium nitrate powder, potassium nitrate powder and neodymium nitrate powder are independently placed in a vacuum drying o...

Embodiment 3

[0060] Weigh sodium nitrate, potassium nitrate and neodymium nitrate respectively according to the mass ratio of 52:43:5; wherein, the purity of sodium nitrate, potassium nitrate and salt neodymium nitrate are all greater than 99%, and the sum of impurity ions is less than 1%; Sodium nitrate is put into the mortar, adopts mechanical grinding mode to grind 45min, passes through the sieve (the average aperture of sieve is 1.5mm) after the grinding is finished, obtains sodium nitrate powder; The grinding mode grinds for 45min, and passes through a sieve (the average aperture of the sieve is 1.5mm) after the grinding is completed to obtain potassium nitrate powder; the neodymium nitrate taken by weighing is put into a mortar, and the mechanical grinding method is used to grind for 45min, and after the grinding is completed, pass Sieve (the average aperture of the sieve is 1.5mm) to obtain neodymium nitrate powder; sodium nitrate powder, potassium nitrate powder and neodymium nitrat...

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Abstract

The invention discloses a method for preparing a ternary nitric acid molten salt phase change heat storage material. The method comprises the steps of 1, weighing sodium nitrate, potassium nitrate and neodymium nitrate, and crushing sodium nitrate, potassium nitrate and neodymium nitrate through a mechanical crushing method to obtain sodium nitrate powder, potassium nitrate powder and neodymium nitrate powder; 2, mixing the sodium nitrate powder, the potassium nitrate powder and the neodymium nitrate powder to obtain a ternary nitric acid molten salt phase change heat storage material prefabricated body; 3, first melting the ternary nitric acid molten salt phase change heat storage material prefabricated body and then sequentially performing drying and ball milling crushing treatment to obtain the ternary nitric acid molten salt phase change heat storage material. According to the method for preparing the ternary nitric acid molten salt phase change heat storage material, the problems that an existing molten salt phase change heat storage material is high in cost, long in production cycle and complex in process in the preparation process are solved, and the prepared ternary nitric acid molten salt phase change heat storage material has the advantages of being wide in use temperature range, high in heat storage capability, low in corrosiveness and good in liquidity.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of phase change heat storage materials, and in particular relates to a preparation method of phase change heat storage materials of ternary nitric acid molten salt. technical background [0002] Solar energy is affected by the rotation of the earth, the intensity of light, the alternation of day and night, the change of climate and seasons, and the difference in geographical location. There are discontinuous and unstable defects. Heat storage technology can effectively store intermittent heat, and at the same time The heat will be released again in time to make up for the lack of heat and realize the effect of "shaving peaks and filling valleys". [0003] As the core of heat storage technology, heat storage materials can store temporarily unused industrial waste heat or unstable and discontinuous heat (such as: solar energy, geothermal heat, etc.) Released continuously, this can reduc...

Claims

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Application Information

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IPC IPC(8): C09K5/12
Inventor 王俊勃宋宇宽徐洁刘松涛贺辛亥胡新煜姜凤阳
Owner 辽宁卓仑科技有限公司
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