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Method for detecting coal clinkering property by testing chromatic aberration value of coal ash

A technology of color difference value and coal-fired ash is applied in the field of detection of coal-fired slagging in power plant boilers, which can solve problems such as boiler slagging, and achieve the effects of high accuracy, simple test and low cost.

Inactive Publication Date: 2011-02-02
XIAN THERMAL POWER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Method 1 is a verification scheme. The real furnace test firing may cause accidents such as serious slagging of the boiler and affecting operation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] In this example, the slagging properties of coal in the Carboniferous Permian coal accumulation area (Shenfu-Dongsheng) in North China were predicted.

[0044] 1) First, coal is divided into A-F areas according to coal quality and origin:

[0045] Area A: lignite in the Late Jurassic coal-accumulating area of ​​Northeast Inner Mongolia and the Carboniferous-Permian coal-accumulating area in North China;

[0046] Area B: Bituminous coal, lean coal, and anthracite in the Late Jurassic coal accumulation area of ​​Inner Mongolia in Northeast China and the Carboniferous Permian coal accumulation area in North China;

[0047] Area C: Northwest Early and Middle Jurassic Coal Accumulation Area, North China Carboniferous Permian Coal Accumulation Area, Yunnan-Tibet Middle and Cenozoic Era Coal Accumulation Area, South China Late Permian Coal Accumulation Area Junction, Shenfu-Dongsheng Bituminous Coal;

[0048] Area D: Bituminous coal from the Early and Middle Jurassic coal acc...

Embodiment 2

[0069] Using the same steps and methods to predict the slagging property of a lignite in area A, the coal-fired slagging index Sc = 0.684, the test result of the lignite slagging test in the laboratory is Sc = 0.66, high slagging, and the prediction result is consistent with the trend of the test result .

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PUM

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Abstract

The invention relates to a method for detecting the clinkering property of fire coal by testing the chromatism value of fire coal ash, which comprises the following steps: a color difference meter undergoes zero adjustment and calibration by a standard black barrel and a setting ceramic chip at first; residual ash is loaded into a test vessel and then placed on the color difference meter for test; three tristimulus values X, Y and Z, the red component A, the yellow component B, the white content L and the yellow content YI of the coal ash are measured; a fire coal region is selected; the clinkering index Sc is obtained by calculation; and the clinkering tendency of the coal is determined according to the clinkering index Sc of the fire coal. The predicted clinkering index of the fire coaland the clinkering tendency result are notified to boiler operators who then implement preventive measures. The method has the characteristics of convenience, quickness and safety, and does not increase extra labor for laboratory assistants; and the forecast accuracy reaches more than 80 percent.

Description

technical field [0001] The invention relates to a detection method for coal combustion slagging in power plant boilers, in particular to a method for detecting coal combustion slagging by testing the color difference value of coal ash. Background technique [0002] The slagging characteristic of coal is closely related to the safety of boiler operation, and it is a coal characteristic that must be involved in boiler design, transformation and operation adjustment. Since the 1970s and 1980s, a large number of researches on coal slagging performance have been carried out at home and abroad. The more intuitive method for predicting coal slagging characteristics is trial firing on actual boilers, but the results of trial firing are often More generally, the conclusion is often the adaptability of a certain coal to the existing boiler, and it is not easy to draw a numerical index. [0003] The second way is to carry out the pulverized coal combustion test on the test furnace, wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/25G01N33/22
Inventor 相大光薛宁姚伟
Owner XIAN THERMAL POWER RES INST CO LTD