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CN105026528B 甲烷气体浓缩方法 有权

甲烷气体浓缩方法
摘要：
在通过PSA将甲烷气体浓缩的情况下，使甲烷浓度进一步提高。在设置填充有吸附煤矿气体中的甲烷气体的吸附材料（A11～A41）的吸附塔（A1～A4）来进行PSA循环的情况下，对于吸附塔（A1～A4）分别作为中间压状态而设定吸附塔（A1～A4）内压力不同的多个压力状态；作为均压（降压）工序而进行：初级均压（降压）工序，将高压状态的吸附塔（A1～A4）内的气体向比该吸附塔（A1～A4）上部低压的中间压状态的其他吸附塔（A1～A4）上部移送，使吸附塔（A1～A4）内的压力成为高压侧的中间压状态；和最终均压（降压）工序，将处于比低压状态高压的高压侧的中间压状态的吸附塔（A1～A4）内的气体向低压状态的其他吸附塔（A1～A4）移送，使吸附塔（A1～A4）内的压力成为低压侧的中间压状态。
摘要（英）：

Adsorption towers are filled with adsorbents that adsorb methane gas in coal mine gas and perform a PSA cycle. For each of adsorption towers, a plurality of different pressure states of the internal pressure of the adsorption tower are set as an intermediate pressure state. As a pressure equalization step, an initial pressure equalization step of transferring the gas in one of the adsorption towers that is in a high pressure state to another one of the adsorption towers that is in an intermediate pressure state, and a final pressure equalization step of transferring the gas in one of the adsorption towers that is in the high pressure-side intermediate pressure state to another one of the adsorption towers that is in the low pressure state are performed.

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