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Method for measuring calorific value of high volatile coal

A measurement method and technology of volatile content, which is applied in the field of calorific value measurement of high volatile coal, can solve problems such as splashing and low test results, and achieve accurate and timely calorific value

Inactive Publication Date: 2016-07-20
BENGANG STEEL PLATES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the sample (high volatile matter) that is easy to splash when burning, when the oxygen filling pressure is still (2.8-3.0) MPa, operate according to the method stipulated in the national standard, sometimes it will cause the sample to ignite and burn in the oxygen bomb. Splash phenomenon, so that the test results are low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A calorific value determination method for high volatile coal, comprising the following steps:

[0015] First measure the value of the volatile content of the coal to be 28%, and the oxygen filling pressure in the oxygen bomb is 2.5MPa, and then detect the accurate value of the calorific value.

[0016] Among them, coal with a volatile content of 28% to 37%; coal with a volatile content of 38% to 45%, the oxygen filling pressure in the oxygen bomb is 2.0 to 2.2Pa; coal with a volatile content greater than 45% is charged in the oxygen bomb The oxygen pressure is 1.8-2.0 MPa.

Embodiment 2

[0018] A calorific value determination method for high volatile coal, comprising the following steps:

[0019] Firstly, the value of the volatile content of the coal is determined to be 37%, and the oxygen filling pressure in the oxygen bomb is 2.8MPa, and then the accurate value of the calorific value is detected.

Embodiment 3

[0021] A calorific value determination method for high volatile coal, comprising the following steps:

[0022] Firstly, the value of the volatile content of the coal is determined to be 32%, and the oxygen filling pressure in the oxygen bomb is 2.7MPa, and then the accurate value of the calorific value is detected.

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PUM

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Abstract

The invention relates to a method for measuring calorific value of high volatile coal. The method is mainly used for solving the problem of lower accuracy of a testing result caused by the splashing of specimens during ignition and combustion in an oxygen bomb due to the inaccurate oxygen filling pressure in the existing coal calorific value measuring process. The method for measuring the calorific value of the high volatile coal specifically comprises the following steps of firstly, measuring the value of a volatile matter of the coal; according to the value of the volatile matter, controlling the magnitude of oxygen filling pressure; detecting the accurate value of the calorific volume. The method has the advantage that the calorific values of lignite with low metamorphic grade, and high volatile coals of gas coal, gas-fat coal and the like can be accurately and timely detected.

Description

technical field [0001] The invention relates to a method for measuring the calorific value of high volatile coal, belonging to the technical field of coal production. Background technique [0002] Calorific value is one of the most important items in coal quality analysis, the main indicator for judging the economic value of power fuels, and the main basis for pricing in coal trade. Its measuring principle is to measure the calorific value of coal in an oxygen bomb calorimeter. That is, the analytical sample is burned in an oxygen bomb filled with excess oxygen, and the heat capacity of the oxygen bomb calorimeter is determined by burning a certain amount of reference calorimeter benzoic acid, according to the temperature rise generated by the calorimetric system before and after the sample is ignited, and After correcting the additional heat such as ignition heat, the barrel heating value of the sample can be obtained. After deducting the heat of formation of nitric acid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/26
CPCG01N25/26
Inventor 张朋云王刚随月斯
Owner BENGANG STEEL PLATES