氧浓度对松散煤耗氧速率影响的实验研究

Experiment Study on Oxygen Concentration Affected to Oxygen Consumption Rate of Loose Coal

文章设计了松散煤在不同供氧条件下的程序升温实验,并应用气相色谱仪对温升过程中特定温度下的出口气体氧浓度进行分析。计算了不同氧浓度下煤样在特定温度的耗氧速率,比较了在几种不同氧浓度条件下煤样在各个温度点耗氧速率的大小,并对一定温度下的耗氧速率与氧浓度进行拟合。结果表明:在不同氧气浓度条件下,松散煤的耗氧速率均随温度升高而增大,氧气浓度会影响耗氧速率大小,而对耗氧速率随温度的变化趋势无明显影响;相同温度下,煤样的耗氧速率随氧气浓度的升高而增大,且耗氧速率与供氧浓度间满足对数关系。

The paper had a design on the programmed temperature rising experiment of the loose coal under the different oxygen supply conditions. A gas chromatograph chromatography was applied to the analysis on the oxygen concentration of the outlet air under the rated temperature during the temperature rising process. The oxygen consumption rate of the coal sample with different oxygen concentration and under the rated temperature was calculated, a comparison was conducted on the oxygen consumption rates of the coal samples at each temperature point and under the different oxygen concentration condition and a fitting was conducted on the oxygen consumption rate and oxtgen concentration under the certain temperature. The results showed that under the different oxygen concentration condition, the oxygen consumption rate of the loose coal would be increased with the temperature increased. The oxygen concentration would affect the oxygen consumption rate and would have no obvious influence to the oxygen consumption rate with the temperature varied. Under the same temperature, the oxygen consumption rate of the coal sample would be increased with the oxygen concentration increased and the oxygen consumption rate and the logarithmic relationship between the oxygen supplied concentration could be met.