Method for detecting quality characteristics of fired coal raw material

Abstract

The invention relates to a method for detecting quality characteristics of fired coal raw material. The method comprises the following steps of 1, using a coal stack as a sampling unit, and obtaininga coal sample with granularity smaller than 13mm; 2, putting the coal sample with granularity smaller than 13mm into an air drying box with temperature not higher than 40 DEG C to dry, and measuring the external moisture; crushing the coal sample until the granularity is smaller than 3mm, putting into the air drying box with temperature of 105 to 110 DEG C to dry, and measuring the internal moisture, so as to obtain the total moisture of the fired coal; 3, crushing the coal sample until the granularity is smaller than 0.15mm, drying for 0.5h in an oven with temperature of 50 DEG C, putting into the drying box with temperature of 105 to 110 DEG C to dry, and measuring the air dry base moisture; 4, putting the coal sample with granularity smaller than 13mm into an oxygen bomb with pressure of 2.8 to 3 MPa, measuring by a constant-temperature type oxygen bomb calorimeter, and measuring the air dry base low-grade heat value; 5, according to the total moisture of the fired coal, the air drybase moisture and the air dry base low-grade heat, judging whether the quality requirement standard of the coal is met or not. The method has the advantage that the actual moisture content and minimum heat value of the fired coal can be precisely measured, so as to more comprehensively and accurately judge the quality of the fired coal.

Description

technical field [0001] The invention relates to the technical field of coal combustion detection, in particular to a detection method for the quality characteristics of raw coal combustion. Background technique [0002] At present, in the production process of electric power, energy, building materials, metallurgy and other industries, it is often necessary to provide heat energy through the combustion of coal. In order to ensure the quality of coal to meet the needs of stable combustion, it is required to test the quality characteristics of coal before using it. However, at present, only a single parameter value of the water content of the coal is usually measured to determine the quality of the coal. This measurement method is often susceptible to the instability of the drying effect, and cannot accurately measure the moisture content of the coal. Water content, there is a large error in the judgment of the quality characteristics of the coal, and the quality and quality ...

AI Technical Summary

Problems solved by technology

However, at present, only a single parameter value of the water content of the coal is usually measured to determine the quality of the coal. This measurement method is often susceptible to the instability of the drying effect, and cannot accurately measure the moisture content of the coal. Water content, there is a large error in the judgment of the quality characteristics of the coal, and the quality and quality of the coal cannot be judged comprehensively and accurately, which finally leads to the problem that the fuel cost is greatly increased due to the judgment error of the quality characteristics of the coal