基于油浴程序升温试验系统的煤自燃特性研究

Study on Coal Spontaneous Combustion Features of Temperature Rising System Based on Oil Bathing Program

为了掌握煤自燃的规律,采用油浴程序升温试验系统,对亭南煤矿不同粒径煤样进行了程序升温试验,发现油浴程序升温试验系统比空气介质的程序升温系统稳定;可以采用CO和C2H4作为自燃预测预报的指标气体;亭南煤样自燃临界温度为55～70℃,干裂温度为90～110℃,煤样粒径越小则煤自燃的临界温度和干裂温度也越小;煤样耗氧速率、气体产生速率随煤温的升高而增大,煤样粒径分布范围越宽的煤样的耗氧速率越大。

In order to master the fire ignition law of the coal spontaneous combustion,a temperature rising experiment system was applied to coal samples with different particle from Tingnan Mine.It was found that the temperature rising experiment system with oil bathing was stabilizer than the one with air medium.CO and C2H4 could be used as forecast and prediction index gases for spontaneous combustion.The spontaneous combustion critical temperature of the Tingnan coal sample obtained was 55～70 ℃ and the dry crack temperature obtained was 90～110 ℃.The smaller particle size of coal sample was,the lower spontaneous combustion critical temperature and dry crack temperature was.The oxygen consumption ratio and gas production rate would be rising as the coal temperature get higher.The wider the coal sample distributing range was,the higher the oxygen consumption ratio would be.