低温阶段程序升温法对煤氧化过程影响的研究

Effect of Temperature Rising Programmed Test on Process of Coal Oxidation in Low Temperature Stage

基于温控方式对煤氧化指标测试的重要性,采用自主研制的煤氧化模拟试验系统,通过与恒温测试法对比煤氧化升温过程中CO的生成量,研究低温阶段程序升温法对煤氧化过程的影响。结果表明:程序升温法能较好地表现出煤的氧化能力,但程序升温会造成煤样罐中温度场分布不均匀,温度梯度逐渐增大,煤体氧化程度不相同。低温条件下,程序升温法对煤氧化过程的影响总体上还比较小,且程序升温法采用程序控制温升,升温连续性好,操作简单,是一种可靠的温控方式,可以替代恒温测试法进行测试,有很好的应用价值。

Based on the importance of temperature control mode to coal oxidation index test,and adopting a self-made coal oxidation simulation test system,the effect of temperature rising programmed test on process of coal oxidation was studied by comparing the amount of carbon monoxide produced in coal oxidation with that obtained by constant temperature test.It was found out that temperature rising programmed test can show well oxidation of coal,but with the temperature rising,it can result in uneven temperature distribution in the coal tank,a gradual increase of temperature gradient and an uneven coal oxidation.The impact on process of coal oxidation made by temperature rising programmed test is little on the whole in the low temperature stage.Meanwhile,this method operates simply and has a good continuity of temperature rising due to adopting program to control temperature.Therefore,in the low temperature stage,temperature rising programmed test is a reliable temperature control mode,which can replace constant temperature test with good application value.