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利用变压吸附分离技术,富集分离煤矿采煤矿井的巷道内部乏风瓦斯,目的在于保证煤炭生产安全,同时实现低浓度甲烷资源再利用。实验采用自行设计的双塔式变压吸附设备和改性活性炭吸附剂,整个流程由常压吸附联合真空解吸2个部分构成。实验比较了2种不同的活性炭吸附剂对瓦斯的吸附性能,通过调整切换时间、改变反吹流量等参数考察了吸附分离前后甲烷浓度的变化规律,进一步优化了工况参数。结果表明,变压吸附法能够有效实现乏风瓦斯的分离与富集。
The use of pressure swing adsorption separation technology enriches and separates the gas inside the roadway of coal mining coal mines, with the purpose of ensuring the safety of coal production and at the same time, reusing low-concentration methane resources. Experiments using self-designed double-tower pressure swing adsorption equipment and modified activated carbon adsorbent, the entire process by atmospheric pressure adsorption vacuum desorption of two parts. The adsorption performance of two kinds of activated carbon adsorbents on methane was experimentally compared. The changes of methane concentration before and after adsorption separation were investigated by adjusting the switching time and changing the backflushing flow rate, and the working parameters were further optimized. The results show that the pressure swing adsorption method can effectively realize the separation and enrichment of the gas with no gas.