Method for quickly searching for lowest melting point of ternary molten salt system

A technology with low melting point and melting point, which is applied in the field of finding the lowest melting point of ternary molten salt system and quickly finding the lowest melting point of ternary molten salt system. It can solve the problems of blind screening of molten salt formula, slow process, unreliability, etc. Eutectic point, reducing experimental workload and improving reliability

Inactive Publication Date: 2018-12-18
SHENZHEN ENESOON SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. To find the melting point of the multi-component molten salt system, it is necessary to test a large number of molten salt formulas. The process is slow, and there is no prior work to predict the formula corresponding to the corresponding lowest mel

Method used

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  • Method for quickly searching for lowest melting point of ternary molten salt system
  • Method for quickly searching for lowest melting point of ternary molten salt system
  • Method for quickly searching for lowest melting point of ternary molten salt system

Examples

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Embodiment 1

[0044] This embodiment provides a method for quickly finding the lowest melting point of the ternary molten salt system, including the following steps:

[0045] (1) Draw the component diagram of the ternary molten salt system (component A-component B-component C) (see figure 1 ), the component figure is marked as triangle A, and the three vertices of the triangle represent three kinds of pure substances (i.e. A substance, B substance and C substance), and the three sides represent the binary mixed molten salt of two components respectively, The points inside the triangle represent the ternary mixed molten salt;

[0046] (2) Measure the melting points at the 3 vertices, the melting points at 4 points on each side (these 4 points divide the side where it is located into 5 parts), and the melting points at the 6 points inside the triangle (these 6 points points are obtained by intersecting the parallel lines of the triangle through the points on each side);

[0047] (3) Use the...

Embodiment 2

[0049] (1) Draw the ternary molten salt system (Ca(NO 3 ) 2 -NaNO 2 -KNO 3 ), the composition graph is marked as a triangle A, and the three vertices of the triangle represent three pure substances (i.e. Ca(NO 3 ) 2 、NaNO 2 and KNO 3 ), the three sides represent the binary mixed molten salt of two components respectively, and the points inside the triangle represent the ternary mixed molten salt;

[0050] (2) Measure the melting points at the 3 vertices, the melting points at 4 points on each side (these 4 points divide the side where it is located into 5 parts), and the melting points at the 6 points inside the triangle (these 6 points points are obtained by intersecting the parallel lines of the triangle through the points on each side);

[0051] (3) Use the melting point temperature measured in step (2) as the data point, use the software to draw the isotherm curve, so as to predict the changing law of the melting point of the ternary molten salt system with the comp...

Embodiment 3

[0054] This embodiment provides a method for quickly finding the lowest melting point of the ternary molten salt system, including the following steps:

[0055] (1) Draw the ternary molten salt system (NaNO 3 -NaNO 2 -KNO 3 ) component diagram (see image 3 ), the composition diagram is marked as triangle A, and the three vertices of the triangle represent three pure substances (i.e. NaNO 3 、NaNO 2 and KNO 3 ), the three sides represent the binary mixed molten salt of two components respectively, and the points inside the triangle represent the ternary mixed molten salt;

[0056] (2) Measure the melting points at the 3 vertices, the melting points at 4 points on each side (these 4 points divide the sides equally), and the melting points at the 6 points inside the triangle (these 6 points are These data points are distributed at equal intervals (that is, the distances between adjacent points are the same);

[0057] (3) Use the melting point temperature measured in step (...

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Abstract

The invention discloses a method for searching for the lowest melting point of a ternary molten salt system, comprises the steps: 1) drawing a component diagram of the ternary molten salt system; 2) measuring a melting point at three vertices in the component diagram, wherein at least one melting point of points on each side, and at least one melting point of point inside the triangle; 3) drawingan isothermal curve by using software based on the measured melting-point temperatures which are used as data points, so that the change rule of the melting point of the ternary molten salt system changing with the component is pre-judged; and 4) measuring data and further reducing the prediction range in the low melting component area by using the above same method until the lowest melting pointof the ternary molten salt system is finally found. According to the method for searching for the lowest melting point of the ternary molten salt system, the lowest melting point of the ternary moltensalt can be quickly found by reasonably arranging the experimental points, determining the low melting-point component area, and simulating and drawing the isotherm curve. In respect of the ternary molten salt system with a eutectic point, the eutectic point can be quickly reduced to the range of the lowest melting point, which facilitates finding the eutectic point quickly.

Description

technical field [0001] The invention belongs to the technical field of melting point measurement of ternary molten salt systems, and relates to a method for finding the lowest melting point of ternary molten salt systems, in particular to a method for quickly finding the lowest melting point of ternary molten salt systems. Background technique [0002] At present, in the field of industrial energy storage and high-temperature solar heat utilization, the nitric acid molten salt system is the main body used for heat transfer and heat storage media, and the binary molten salt KNO 3 -NaNO 3 Although the system has a high melting point, it is easy to cause blockage of the pipeline and affect the safety of the system. Therefore, it is very urgent to develop low melting point molten salt. Hitec and Hitec XL are ternary molten salt systems that have been reported, they have a ratio of KNO 3 -NaNO 3 The lower melting point of the system provides a basis for the development of othe...

Claims

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Application Information

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IPC IPC(8): G01N25/04
CPCG01N25/04C09K5/12G01N25/02
Inventor 曾智勇曾帆崔小敏
Owner SHENZHEN ENESOON SCI & TECH
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