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Method for research carbocoal constriction performance in pyrogenation processing of coal

A technology of shrinkage characteristics and coal pyrolysis, applied in the fields of coal science and coal chemical industry, can solve problems such as unresolved shrinkage characteristics of semi-coke, achieve the effect of improving production efficiency and product quality, and avoiding delayed coking discharge

Inactive Publication Date: 2008-06-18
TAIYUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem of accurately obtaining the shrinkage characteristics of semi-coke in the process of coal pyrolysis by using image analysis methods on the basis of microscopic pictures has not been resolved, and the relevant technical solutions have not yet been reported or made public.

Method used

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  • Method for research carbocoal constriction performance in pyrogenation processing of coal
  • Method for research carbocoal constriction performance in pyrogenation processing of coal
  • Method for research carbocoal constriction performance in pyrogenation processing of coal

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Experimental program
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Effect test

specific Embodiment approach I

[0018] Sampling with a capillary tube to ensure that the research on each sample is comparable. Put the coal sample horizontally in the sample pool, and each sample has the same thickness. Adjust the light intensity of the microscope to 10, turn the hot stage into N 2 (The flow rate is 120mL / min), turn on the circulating cooling water, start the temperature rise and temperature control program, and heat from room temperature to the final temperature when the temperature rise rate is 5K / min; use the image analysis software configured by the microscope system, select the exposure time 51.5ms, gain 2.1, white balance 49, 2.90, 16 to make the image quality the best, every certain temperature is synchronously collected microscopic pictures by digital camera and saved for image analysis. The thermal decomposition of coal particles shrinks both horizontally and vertically, which is manifested in the reduction of the area of ​​coal particles on the micrograph. The micrographs collect...

specific Embodiment approach II

[0029] Place the platinum crucible containing Shendong raw coal particles in a micro-heating stage, the temperature rise rate is 10K / min, and the others are the same as the specific embodiment I. The end temperature of the semi-coke shrinkage of this sample is 650°C, and the calculation results of the kinetic parameters of the three stages during the semi-coke shrinkage process are shown in Table 3:

[0030] Table 3 Kinetic parameters of Shendong raw coal semi-coke shrinkage process at 1K / min

[0031]

specific Embodiment approach III

[0033] Place the platinum crucible with the Pingshuo vitrinite particles on a micro-heating stage with a heating rate of 20K / rain, and the others are the same as in Embodiment I. The semi-coke shrinkage end temperature of this sample is 790°C. C, The calculation results of the kinetic parameters of the three stages in the semi-focus contraction process are shown in Table 4:

[0034] Table 4 Kinetic parameters of the semi-focus contraction process of Pingshuo vitrinite at 20K / min

[0035]

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Abstract

This invention relates to one method to study coal pyrogenic semi-coking contract property, which is characterized by using microscope and heating bench as main test means and coal and microscope group particle as study subject and to catch microscope images through microscope to get sample under pyrogenic process dynamic property and using image analysis method to get semi-coking contracting method.

Description

technical field [0001] The invention discloses a method for studying the shrinkage characteristics of semi-coke in the process of coal pyrolysis, which belongs to the fields of coal science and coal chemical industry, and specifically relates to a method of accurately obtaining the shrinkage characteristics of semi-coke in the process of coal pyrolysis by using an image analysis method The technical scheme of the method. Background technique [0002] Because the pyrolysis of coal is an important and basic process in various thermal conversion processes of coal, it has become an important issue concerned by coal chemical research institutes. The semi-coke shrinkage characteristic of coal during pyrolysis is an important technical feature that needs to be mastered in coking technology. Thermogravimetric analysis is a common method for studying thermal decomposition of coal, which can obtain the kinetic characteristics of devolatilization in coal thermal decomposition, but it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/00G01N21/84G06F19/00
Inventor 谢克昌常海洲曾凡桂李文英王传格李军张代林
Owner TAIYUAN UNIV OF TECH
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