Method for detecting calorific value characteristic of raw material fire coal

Abstract

A method for detecting a calorific value characteristic of raw material fire coal comprises the following steps: 1. taking a coal pile as a sampling unit to obtain a coal sample with a particle size less than 13mm; 2. adding the air-dried coal sample with the particle size less than 13mm into a combustion boat at 1140-1160 DEG C, and calculating total sulfur content; 3. breaking the air-dried coalsample to a particle size less than 0.2 mm, sending the coal sample to a constant temperature zone of a muffle furnace with temperature less than or equal to 100 DEG C, firing for 40 min at 805-825 DEG C, and measuring an air dry ash component; crushing the coal sample to a particle size of less than 0.2 mm, sending the coal sample to a furnace heated to 920 DEG C for heating for 7 min, and measuring an air dry volatile component; calculating air dry fixed carbon; 4. making burned coal ash into an ash cone, heating the ash cone in the furnace, and measuring ash fusibility by an ash fusibilitytester; and 5. according to the total sulfur, the air-dried fixed carbon and the ash fusibility of the fire coal, determining whether the total sulfur, the air-dried fixed carbon and the ash fusibility of the fire coal meet the calorific value requirements of coal. The method can accurately determine the actual total sulfur content, air-dried fixed carbon and ash fusibility of the fire coal so asto achieve more comprehensive and accurate determination of the calorific value of the coal.

Description

technical field [0001] The invention relates to the technical field of coal combustion detection, in particular to a detection method for the calorific value 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 calorific value characteristics of coal to meet the needs of stable combustion, it is required to detect the calorific value characteristics of coal before using it. However, at present, the calorific value characteristics of coal such as ash and volatile matter are measured at the same time at a single burning ambient temperature to determine the level of the calorific value characteristics of coal, but this measurement method is often susceptible to reaction temperature. Due to the influence of instability, it is impossible to accurat...

AI Technical Summary

Problems solved by technology

However, at present, the calorific value characteristics of coal such as ash and volatile matter are measured at the same time at a single burning ambient temperature to determine the level of the calorific value characteristics of coal, but this measurement method is often susceptible to reaction temperature. Due to the influence of instability, it is impossible to accurately measure the actual corresponding calorific value characteristics such as ash and volatile matter of coal combustion, and there are large errors in the determination of coal combustion calorific value, and it is impossible to fully and accurately determine the calorific value of coal combustion The high and low characteristics, finally lead to the problem that the fuel cost is greatly increased due to the judgment error of the coal calorific value characteristics