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On-line measuring device for fly ash carbon content of flue

A fly ash carbon content and measurement device technology, applied in the direction of material excitation analysis, can solve the problems of large maintenance, large impact on measurement accuracy, unsatisfactory measurement stability and accuracy, and achieve the goal of ensuring high-precision measurement Effect

Active Publication Date: 2013-12-11
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ash blocking of the sampling gun is one of the main problems of this type of fly ash carbon content online measurement device. In addition, the measurement accuracy is greatly affected by the change of coal type, the measurement stability and accuracy are not ideal, and the maintenance is relatively large. Therefore, it is difficult to meet the user's requirements for long-term stable, reliable and accurate operation of the fly ash carbon content online measurement device

Method used

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  • On-line measuring device for fly ash carbon content of flue
  • On-line measuring device for fly ash carbon content of flue
  • On-line measuring device for fly ash carbon content of flue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An online measurement device for carbon content in fly ash of flue, such as figure 1 As shown, it includes a measurement probe 1 and a measurement analysis unit 2. The measurement analysis unit includes a laser, a spectrometer, and a control device. The control device (ie, an industrial-grade micro industrial computer) is connected to the laser and the spectrometer; the measurement probe includes a housing , A laser focusing module and a spectral signal collecting module, the laser focusing module and the spectral signal collecting module are installed in the housing, the laser focusing module is connected to a laser, and the spectral signal collecting module is connected to a spectrometer; the housing of the measuring probe It is opened on the inner wall of the flue 4, and the edge of the opening of the shell is provided with a gas purging device, which blows out gas to form a gas curtain 5, and the focusing area of ​​the laser focusing module and the spectral signal coll...

Embodiment 2

[0037] The on-line measuring device for carbon content of fly ash in the flue of this embodiment is basically the same as that of embodiment 1, except that:

[0038] The amount of gas blown by the gas purging device is 10 L / min.

[0039] There is an angle of 30° between the laser light generated by the laser focusing module and the signal collection optical path of the spectral signal collection module.

[0040] The gas purging device is only provided with a set of blowing ports, and since the gas purging direction of the gas purging device is parallel to the opening surface of the housing, the opening surface of the measuring probe housing is parallel to the flue axial direction. The air port is blowing from top to bottom.

Embodiment 3

[0042] The on-line measurement device for carbon content in fly ash of the flue in this embodiment is basically the same as that in embodiment 2, except that:

[0043] The amount of gas blown by the gas purging device is 10 L / min.

[0044] The laser light generated by the laser focusing module and the signal collection optical path of the spectral signal collection module form an angle of 60°.

[0045] The gas purging device is only provided with a set of blowing ports, and since the gas purging direction of the gas purging device is parallel to the opening surface of the housing, the opening surface of the measuring probe housing is parallel to the flue axial direction. The air port is blowing from bottom to top.

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Abstract

The invention discloses an on-line measuring device for a fly ash carbon content of a flue, and belongs to the technical field of fly ash detection of boiler flues. The measuring device comprises a measuring probe and a measuring and analyzing unit, wherein the measuring and analyzing unit comprises a laser device, a spectrograph and control equipment; the control equipment is connected with the laser device and the spectrograph; the measuring probe comprises a housing, a laser focusing module and a spectral signal collection module; the laser focusing module and the spectral signal collection module are mounted in the housing; the laser focusing module is connected with the laser device; the spectral signal collection module is connected with the spectrograph; an opening of the housing of the measuring probe is formed in an inner wall of the flue; a gas blowing device is arranged on the edge of the opening of the housing; gas blown out by the gas blowing device forms a gas curtain; and focusing areas of the laser focusing module and the spectral signal collection module are located in the flue on the outer side of the gas curtain. The measuring device solves the problem that fly ash blocks a sampling gun due to the fact that the fly ash is required to be taken out of the flue by the sampling gun.

Description

Technical field [0001] The invention relates to the technical field of boiler flue fly ash detection, in particular to an online measurement device for the carbon content of the flue fly ash. Background technique [0002] The carbon content of fly ash, as an important economic and technical indicator for boiler operation, directly reflects the combustion efficiency of the boiler, and to a certain extent reflects the management level of the power plant and the operating status of the equipment. Real-time monitoring of the carbon content of fly ash is helpful to guide operation to adjust the air-to-coal ratio and reasonable coal fineness, improve boiler combustion control level, reduce mechanical incomplete combustion loss, improve boiler combustion stability and economy, and guarantee Safe operation of pulverizing system and air supply system. With the continuous development of thermal power generating units in the direction of high parameters and large capacity, the measurement ...

Claims

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Application Information

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IPC IPC(8): G01N21/63
Inventor 沈跃良陆继东朱志飞徐齐胜姚顺春李壮扬张博潘刚
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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