摘要
在煤矿开采过程中采出的煤层气因含有空气难以加工利用,直接放空,不仅污染大气环境,而且浪费燃气资源。针对某典型含氧煤层气气源,设计了一种氮—甲烷膨胀制冷的液化精馏工艺,并利用HYSYS进行了模拟计算,结果显示,该工艺可较彻底除去氮气、氧气等杂质,获得较高浓度的甲烷产品,甲烷回收率达到99.99%。同时分析了回流比、塔板数以及入塔温度对塔底产品含氧量和甲烷含量的影响。
The coal-bed methane ( CBM) extracted during coal mining contains oxygen and is difficult to be processed and utilized, if it is directly vented, it not only pollutes the environment but also causes the resources waste. Based on a typical oxygen-contained CBM source, a liquefaction rectification process by nitrogen-methane expansion refrigeration was designed and simulation computation was made with HYSYS. The results showed that the nitrogen and oxygen in CBM can be completely removed by this process, the methane product with relatively high concentration can be got, and the methane recovery rate can reach 99. 99%. In addition, analysis was made on the influence of the reflux ratio, plate number and feed temperature on the oxygen and methane content in the bottom products.
出处
《矿业安全与环保》
北大核心
2014年第1期12-15,共4页
Mining Safety & Environmental Protection
关键词
含氧煤层气
液化
分离
工艺模拟
HYSYS
oxygen-contained coal-bed methane
liquefaction
separation
HYSYS
process simulation