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Rapid detection method of ash in coal samples

A technology for coal samples and detection methods, applied in measurement devices, analysis materials, material analysis by optical means, etc., can solve problems such as no rapid detection method, few research reports on NIRS technology, and no quantitative analysis proposed. The effect of saving on acquisition, saving time and labor, and reducing the cost of analysis

Inactive Publication Date: 2017-11-03
中华人民共和国黄埔出入境检验检疫局
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few research reports on NIRS technology in coal
[0009] According to the data, there are many difficulties in using NIRS technology to detect coal in foreign reports. In China, Fourier transform near-infrared spectroscopy is used to establish a coal volatile and moisture measurement model, but there is no specific method for using NIRS technology to quantitatively analyze coal moisture and volatile. Technical solutions
After a long period of extensive research, the applicant concluded that it is feasible to use near-infrared analysis technology to establish a rapid detection method for coal-related quality items. However, the following key technical problems have not been effectively resolved: (1) looking for coal NIRS Appropriate mathematical conversion form of spectral data; (2) Find a reliable functional relationship between the NIRS detection data with appropriate mathematical conversion and the detection data of conventional methods for coal quality components; (3) Further correct and verify the obtained functional relationship
There is no technical report on the establishment of a rapid detection method for coal ash content using near-infrared analysis technology

Method used

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  • Rapid detection method of ash in coal samples
  • Rapid detection method of ash in coal samples
  • Rapid detection method of ash in coal samples

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] This embodiment provides a novel rapid detection method for ash content in a coal sample, comprising the following steps:

[0069] S1. collect and prepare several coal samples, measure the ash content of each sample respectively by conventional method;

[0070] S2. scan and collect spectral data and curves of the coal sample with a NIRS analyzer;

[0071] S3. Mathematically process the spectral data of the sample obtained in S2, generate an ash calibration equation through regression calculation, correct and verify the ash calibration equation, and establish a detection model;

[0072] S4. Fill the sample injector of the NIR instrument directly with the coal samples to be tested (no weighing is required), start the scan button, and the NIR instrument will automatically record and store the sample spectrum. After judging the spectrum type of the sample, click the corresponding detection model to obtain the detection result.

[0073] Among them, the method of collecting...

Embodiment 2

[0129] Embodiment 2 application evaluation experiment

[0130] In this embodiment, the detection model established in the embodiment is used to detect the ash content in a group of coal samples with unknown components to be measured, and then the detection value obtained by the NIRS method is compared and evaluated with the detection value obtained by the conventional physical and chemical method. The comparison results of the two methods are measured by the standard deviation of prediction (SEP, Standard Error of Prediction) and the corresponding coefficient of determination (RSQp) or correlation coefficient Rp.

[0131] Randomly select some coal samples without weighing, and directly fill the sampler of the NIRS instrument one by one, start the scan button, and the NIRS instrument will automatically record and store the sample spectrum. After judging the type of spectrum that the sample belongs to, click on the corresponding detection model to print the detection result and ...

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Abstract

The invention discloses a quick detection method for ash in a coal sample. The method includes the following steps: S1. collect and prepare several coal samples, and measure the ash content of each sample by conventional methods; S2. use NIRS analyzer to scan and collect the spectral data and curves of the coal samples; S3. pair S2 Process the spectral data of the obtained sample, obtain the ash calibration equation through regression calculation, correct and verify the ash calibration equation, and establish a detection model; S4. Fill the sample injector of the NIRS instrument directly with the coal samples to be tested, and start scanning key, the NIRS instrument will automatically record and store the sample spectrum, determine the type of the sample's spectrum, select the corresponding detection model, and obtain the detection result. The accuracy of the coal ash detection method established by the invention meets the requirements of the current standard method for reproducibility tolerance, and the operation is very simple and fast, and the scanning detection of a sample can be completed in about 50 seconds, including the output of data. During the entire detection operation, there is no need to weigh samples, no need to add any chemical reagents, and it is fast, convenient and pollution-free.

Description

technical field [0001] The invention relates to the technical field of coal analysis and detection, and more particularly relates to a novel rapid detection method for ash in coal samples. Background technique [0002] Coal resources are my country's largest energy source and the basic energy material required for industrial development. my country's coal resources are very rich, accounting for about 70% of my country's total energy. [0003] Coal resources are my country's largest energy source and the basic energy material required for industrial development. my country's coal resources are very rich, accounting for about 70% of my country's total energy. [0004] According to international coal testing standards, coal usually needs to be tested for quality items such as fixed carbon. According to my country's national regulations and trade needs, coal usually needs to be tested for indicators such as internal water, total sulfur, volatile matter, ash, calorific value, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/3563G01N21/359
Inventor 苏彩珠李国伟郑建国蔡英俊姚柏辉
Owner 中华人民共和国黄埔出入境检验检疫局