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首页> 外文期刊>Thermochimica Acta: An International Journal Concerned with the Broader Aspects of Thermochemistry and Its Applications to Chemical Problems >STUDYING THE MECHANISMS OF IGNITION OF COAL PARTICLES BY TG-DTA
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STUDYING THE MECHANISMS OF IGNITION OF COAL PARTICLES BY TG-DTA

机译：TG-DTA研究煤颗粒着火机理

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摘要

The mechanisms of ignition of coal of different quality, such as anthracite, bituminous coal and lignite, were studied by thermogravimetry (TG) and differential thermal analysis (DTA). Experiments on coal ignition were carried out at a low heating rate (10 K min(-1)) with particle sizes ranging from 37 to 4000 mu m. It is concluded from this experimental work that (1) ignition measurement by TG-DTA is an excellent method for accurate determination of the ignition temperature of coal particles; (2) with increasing coal quality from lignite through bituminous coal to anthracite, the type of ignition changes from homogeneous ignition through hetero-homogeneous ignition to heterogeneous ignition, and the ignition temperatures also increase; (3) with increasing coal particle size, the type of ignition of Kaipin bituminous coal changes from hetero-homogeneous to homogeneous ignition, and ignition of the char separates from that of the volatile matter and shifts to a higher temperature, whereas both types of ignition of Loy Yang lignite coal and Hongay anthracite coal are not effected by particle size. [References: 9]
机译：通过热重分析（TG）和差热分析（​​DTA）研究了无烟煤，烟煤和褐煤等不同质量煤的着火机理。在较低的加热速率（10 K min（-1））下进行了燃煤实验，粒径范围为37至4000μm。从本实验工作可以得出以下结论：（1）TG-DTA着火测量是精确测定煤粉着火温度的极好方法; （2）随着煤质的提高，从褐煤到烟煤再到无烟煤，点火类型从均质点火通过异质点火转变为异质点火，点火温度也随之升高; （3）随着煤颗粒尺寸的增加，开平烟煤的着火类型从异质着火变为均质着火，炭的着火与挥发性物质分开，并转移到更高的温度，而两种着火Loy Yang褐煤和Hongay无烟煤的粒度不受粒度的影响。 [参考：9]

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