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Method for rapidly detecting total moisture of coal based on low-field nuclear magnetic resonance

A technology of low-field nuclear magnetic resonance and low-field nuclear magnetic resonance, which is applied in the fields of analysis by nuclear magnetic resonance, material analysis through resonance, and measuring devices. problems, to achieve the effect of reducing manpower, improving efficiency and ensuring normal production

Active Publication Date: 2020-03-13
CHINA UNIV OF MINING & TECH
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Problems solved by technology

Although this detection method can obtain accurate moisture content, it takes a long time and it is difficult to realize online detection, which is obviously not conducive to the realization of automation in the future coal preparation plant

Method used

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  • Method for rapidly detecting total moisture of coal based on low-field nuclear magnetic resonance
  • Method for rapidly detecting total moisture of coal based on low-field nuclear magnetic resonance
  • Method for rapidly detecting total moisture of coal based on low-field nuclear magnetic resonance

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Embodiment 1

[0037] 1) Put the coal with known different total moisture into the measuring cylinder, and test it in the low-field nuclear magnetic field. It takes about 4 minutes to obtain the T of coal with different total moisture. 2 Atlas, T 2 Spectrum such as figure 1 shown, based on T 2 Schematic diagram of the first peak point value of different full-moisture coals obtained from the map and software, such as figure 2 As shown, there is a good positive correlation between the first peak point value of NMR test and the total moisture of coal, which shows that the difference of total moisture in coal can be judged with the help of NMR test results, and it is necessary to establish the relationship between the results of NMR test and the total moisture of coal. Models provide important guidance.

[0038] 2) With the help of Origin 9.0 software, establish the relationship between the first peak point value and the total moisture content of coal, such as image 3 As shown, the second-...

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Abstract

The invention relates to a method for rapidly detecting total moisture of coal based on low-field nuclear magnetic resonance. The method is suitable for detecting total moisture of coal quality and comprises steps of taking to-be-tested total-moisture coal for testing under a nuclear magnetic testing condition, obtaining a first peak point value through nuclear magnetic testing software and the T2atlas, and substituting the first peak point value into a relational expression between the first peak point value of the nuclear magnetic signal and the total moisture of the coal to obtain the total moisture. The detection speed is high, the precision is high, the time and labor costs of coal total moisture testing are greatly reduced, and important reference and guiding significance is provided for realizing total moisture online detection; the used low-field nuclear magnetic resonance equipment has the advantages of safety, miniaturization, low cost, easiness in operation, high test speedand the like, can meet various requirements of a coal preparation plant, and has good adaptability.

Description

technical field [0001] The invention relates to a method for detecting total moisture in coal, and is especially suitable for detecting the total moisture in coal with small particle diameters in the coal industry based on low-field nuclear magnetic resonance for rapidly detecting total moisture in coal. Background technique [0002] As a fossil energy, coal has very rich reserves in the world. It has been widely used in steel, chemical, thermal power and other industries. The total moisture content of coal produced in a coal preparation plant is a very important parameter for determining the subsequent use of coal products. In the production process of the coal preparation plant, if the total moisture contained in the clean coal is too high, it will not only seriously reduce the calorific value of the clean coal, but also cause the unloading of coal products. These clean coals with high moisture content are likely to be returned by customers, which not only affects the re...

Claims

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Application Information

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IPC IPC(8): G01N24/08
CPCG01N24/082
Inventor 毛玉强谢广元夏文成彭耀丽沙杰梁龙李懿江郑康豪
Owner CHINA UNIV OF MINING & TECH
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