Online gas-solid two-phase detection method for coal characteristics based on laser induction, and apparatus thereof

A technology of laser induction and detection device, applied in the field of laser diagnosis and measurement, can solve problems such as complex device, and achieve the effects of improving reliability, enhancing spectral intensity, and improving action rate

Inactive Publication Date: 2012-04-25
SOUTH CHINA UNIV OF TECH +1
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Problems solved by technology

The detection method adopted has no mechanical transmission device, which is used to ensure the reliability of the long-term on-site operation of the analysis device, solves the problem of complex online detection and measureme

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  • Online gas-solid two-phase detection method for coal characteristics based on laser induction, and apparatus thereof
  • Online gas-solid two-phase detection method for coal characteristics based on laser induction, and apparatus thereof

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[0020] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings, but the implementation and protection scope of the present invention are not limited thereto.

[0021] like figure 1 Shown, the sampling part of the present invention is installed in the appropriate position of the air powder pipeline between the pulverizer outlet of the coal-fired power plant and the burner inlet, see figure 12 indicated in the. The sampling pipe 3 is connected with the air powder pipeline 1 through the sampling hole 2 . Utilizing the compressed air drawn from the compressed air box 4, a certain negative pressure is formed at the junction 6 of the sampling pipe 3 and the pulverized coal delivery pipe 7, so as to realize the continuous sampling of the pulverized coal in the pulverized air pipeline 1. The pulverized coal flow taken out is conveyed to the cyclone separator 8 through the pulverized coal delivery pipe 7 under...

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Abstract

The present invention provides an online gas-solid two-phase detection method for coal characteristics based on laser induction, and an apparatus thereof. The apparatus comprises a sampling pipe, a coal powder conveying pipe, a cyclone separator, a coal powder falling pipe, a measurement room and a spectrum detection system. The detection method comprises that: the coal powder is subjected to continuous sampling at a proper position on an air-powder pipeline by the sampling pipe, wherein the air-powder pipeline is arranged between a coal mill outlet and a burner inlet; a cycle process of sampling, measuring and returning of the coal powder is realized with the effect of compressed air. According to the present invention, with adopting the measurement system of the measurement method, the taken gas-solid two-phase coal powder particles can be subjected to laser detection only after the simple gas-solid separation by the cyclone separator, and the sample preparing is not required; the gas conveying manner is adopted, and the mechanical transmission apparatus is not used so as to contribute to long term and reliable operation of the whole apparatus in the field environment, and really realize the online detection of the coal characteristics.

Description

technical field [0001] The invention relates to the technical field of laser diagnosis and measurement, in particular to a gas-solid two-phase detection method and device based on online detection of laser-induced coal quality characteristics. Background technique [0002] With the continuous development of industry, coal energy has become increasingly scarce, resulting in higher and higher requirements for the quality and composition of coal and combustion efficiency. The traditional method is to conduct off-line analysis after sampling the raw coal. It generally takes several hours from sampling, sample preparation to reporting of test results, and the test results are seriously lagging behind the boiler combustion. This not only causes a waste of energy to a certain extent, but is not conducive to the real-time control and optimal operation of the unit. Therefore, it has become a top priority to adopt advanced and fast analysis methods, especially to develop an effective ...

Claims

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Application Information

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IPC IPC(8): G01N21/63G01N1/10G01N1/28
Inventor 陆继东董美蓉陈世和姚顺春潘凤萍李军李俊彦张曦钟子铭卢伟业
Owner SOUTH CHINA UNIV OF TECH
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