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XRF-NIRS combined coal calorific value high-repeatability detection method

A technology of 1. XRF-NIRS and detection method, which is applied in the field of analysis and detection, to achieve the effect of precise detection, good measurement repeatability and high repeatability

Pending Publication Date: 2022-03-01
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In summary, the current rapid methods for various types of coal calorific value have deficiencies

Method used

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  • XRF-NIRS combined coal calorific value high-repeatability detection method
  • XRF-NIRS combined coal calorific value high-repeatability detection method
  • XRF-NIRS combined coal calorific value high-repeatability detection method

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Embodiment 1

[0038] A high repeatability detection device for coal calorific value combined with XRF-NIRS such as figure 1 As shown, the X-ray tube 1 and the SDD 3 of the XRF detection module are respectively sealed and installed at both ends of the vacuum chamber 4, the angle between the optical paths of the two devices is 45°, and the generated X-rays are emitted from the beryllium window 5, The coal sample is located 2 mm below the beryllium window 5 , and the generated fluorescent signal is collected by the SDD 3 , and the signal output end of the SDD 3 is connected to the signal input end of the computer 13 . The vacuum chamber 4 is connected to a vacuum pump 2 and a vacuum gauge 6. The vacuum pump 2 is used to maintain the vacuum of the entire vacuum chamber, and the vacuum gauge 6 is used to monitor the vacuum degree in the vacuum chamber.

[0039] When measuring the XRF spectrum of coal samples, the X-ray tube 1 works at 12kV / 200μA, and its internal filament works at 0.5V / 0.8A. SDD...

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Abstract

The invention discloses an XRF-NIRS combined coal calorific value high-repeatability detection method, and belongs to the technical field of analysis and detection. The invention develops a set of XRF-NIRS combined coal calorific value high-repeatability detection device and method by combining the characteristics that NIRS can analyze various organic groups positively correlated with calorific value in coal and water molecules negatively correlated with calorific value and XRF can analyze inorganic ash-forming elements negatively correlated with calorific value in coal. The XRF spectrum and the NIRS spectrum of the coal are combined for modeling analysis, and high-repeatability detection of the calorific value of the coal can be achieved. The calorific value of an unknown coal sample is accurately predicted, the measurement repeatability is good, and rapid, high-repeatability and accurate detection of the calorific value of the coal can be realized.

Description

technical field [0001] The invention belongs to the technical field of analysis and detection, and in particular relates to a high-repeatability detection method for coal calorific value combined with XRF-NIRS. Background technique [0002] Promoting the clean and efficient utilization of coal is the only way for the sustainable development of the coal industry and an important part of preventing air pollution and realizing green development. The key lies in the rapid or online accurate detection of coal quality in the process of coal utilization. The main indicators that characterize coal quality include calorific value, ash, moisture, sulfur, volatile matter, etc. Among them, calorific value is an important indicator for evaluating coal quality, which is defined as the total energy released by the unit mass of coal completely combusted with oxygen under certain conditions, and the combustion products are cooled to room temperature. [0003] At present, the detection of co...

Claims

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Application Information

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IPC IPC(8): G01N21/3563G01N21/359G01N23/223G01N25/20
CPCG01N21/3563G01N21/359G01N23/223G01N25/20G01N2201/088G01N2201/129G01N2223/076G01N2223/3303G01N2223/617
Inventor 李佳轩张雷尹王保肖连团贾锁堂
Owner SHANXI UNIV