不同浓度及循环量下MDEA法脱硫效果优选对比

为了优选出脱硫效果最好的MDEA溶液浓度及循环量组合,以我国南方某丘陵地区的含硫页岩气田为研究对象,通过HYSYS模拟MDEA法脱硫效果研究了一定温度和压力条件下的不同MDEA溶液浓度及循环量组合进行页岩气脱硫的效果。结果表明,"38%MDEA溶液浓度+72 m~3/h循环量"组合及"43%MDEA溶液浓度+62 m~3/h循环量"组合以及"45%MDEA溶液浓度+60 m~3/h循环量"组合都可以非常有效的提高页岩气脱硫效果,本着优中选优的原则,最终筛选出"43%MDEA溶液浓度+62 m~3/h循环量"组合。经过最优组合处理之后,页岩气中硫化物含量大幅下降,达到我国商品气二类标准。

Comparison of Desulfurization Efficiency of MDEA Process Under Different Concentration and Circulation Flow Rate

In order to optimize MDEA concentration and circulation flow rate, taking a sulfur-containing shale gas field in hilly area of southern China as the research object, desulfurization effect of MDEA process under certain temperature and pressure conditions was simulated by HYSYS, effect of different MDEA solution concentration and circulation flow rate on shale gas desulfurization efficiency was investigated. The results show that, "38% MDEA solution concentration + 72 m3/h circulating amount","43% MDEA solution concentration + 62m3/h circulating amount" and "45% MDEA solution concentration + 60 m3/h circulating amount" all can effectively improve the shale gas desulfurization effect. At last, "43% MDEA solution concentration + 62 m3/h circulating amount" combination was selected. After using the optimal combination to treat in shale gas, sulfide content can drop significantly, reaching our gas commodity class Ⅱ standard.