煤矿乏风瓦斯变压吸附技术操作条件优化试验研究

Experimental study on working parameters optimization of vacuum pressure swing adsorption technology for ventilation air methane in coal mine

为实现煤矿乏风瓦斯资源化利用,采用变压吸附技术,对变压吸附系统的可变试验参数进行了单因素试验及正交试验,分析了解吸压力、原料气浓度和吸附塔高径比等对甲烷富集效果的影响。试验结果表明:解吸压力越低,解吸气甲烷体积分数越高;原料气浓度越高,提升比率越小;不同因素对试验结果的影响,按重要程度由大到小依次为解吸压力、原料气甲烷体积分数、吸附塔高径比;最佳操作条件为:解吸压力取最小值0 k Pa,原料气甲烷体积分数取0.1%,吸附塔高径比取10.33,提升比率的最大值为1.68。

In order to realize ventilation air methane in coal mine recycling,the vacuum pressure swing adsorption technology was adopted. The single factor experiment and orthogonal experiment were carried out in view of the variable experimental parameters in the pressure swing adsorption system. The influences of desorption pressure,feed gas concentration and the height to diameter ratio of adsorption tower were analyzed. The experimental results show that the volume fraction of desorption methane gas is higher with the lower of the desorption pressure,and the lifting ratio is smaller with the higher of the feed methane gas. The influence of different factors has an order: desorption pressure > feed methane gas > lifting ratio. The best experimental working parameters are desorption pressure of 0 k Pa,and methane volume fraction of feed methane gas of 0. 1%,and the height to diameter ratio of adsorption tower of 10. 33,and the biggest lifting ratio of 1. 68.