真空变压吸附分离含氧煤层气的工艺参数实验研究

Experiment study on process parameters of coal-bed gas separation by vacuum pressure swing adsorption

针对真空变压吸附富集低浓度含氧煤层气,对工艺参数和吸附塔结构进行了优化试验研究。实验结果标明,在一定的时间范围内,随着吸附时间的延长,解吸气和排放气中甲烷体积分数逐渐增大,而排放气中的氧气体积分数则小幅度降低;反吹步骤可以降低排放气中甲烷和氧气的体积分数,但反吹步骤也会降低解吸气中甲烷的体积分数;保持吸附剂不变,吸附塔高径比由3.7增大到13.3,解吸气中甲烷体积分数增大了2.1%,排放气中甲烷体积分数降低了1%。可以为低浓度含氧煤层气富集的实际应用提供参考。

Oxygen-containing coal-bed gas recovery using vacuum pressure swing adsorption processes is investigated experimentally, the optimization experiment on process parameters and the structure of adsorption tower is carried out, The results show that the methane concentration in effluent gas and adsorption gas increases with the increase of adsorption time within a certain time, but the oxygen concentration in effluent gas decreases appreciably. Purge step decreases the methane and oxygen concentration of the effluent gas, but the methane concentration of desorption gas decreases with the increase of purge time. When the length-to-diameter ratio from 3.7 increased to 13.3 with the adsorbent weight constant, the methane concentration in product increases by 2. 1% , and the concentration of methane in effluent gas decreases by 1%. The results could provide reference for the industrial application in low concentration oxygen-containing coal-bed gas enrichment.