高温和高压下CBM的爆炸极限

利用自主开发的实验装置,测定了20,60,100,150,200℃及常压,100,200和300 kPa初始条件下煤层气(CBM)的爆炸极限值.结果表明,随初始温度和压力的增加,爆炸极限上限变大,下限变小,爆炸极限范围变大,危险性增加;初始温度和压力对爆炸极限上限的影响大于对爆炸极限下限的影响.研究结论为CBM开发使用过程安全工艺参数的确定提供了实验依据.

Explosion Limits of CBM at Elevated Pressure and Temperature

The explosion limits of CBM(coal-bed methane) were determined with the temperature respectively at 20,60,100,150,200 ℃ and pressure respectively at atmosphere pressure,100,200,300 kPa by using the self-developed experimental setup.The results showed that with the increase of the initial temperature and pressure,the upper limit of explosion limits will increase,but the lower limit of explosion limit will decrease,resulting in expanding of the scope of explosion limits and increasing of the risk.The effect of initial pressure and temperature on the upper limit of explosion limits is more obvious than that of the lower limit of explosion limits.The results are helpful for the determination of safety process parameters of CBM.