基于AspenPlus的低浓度含氧煤层气低温精馏的模拟研究  

Simulation Study on Cryogenic Distillation Process of Low-concentration Oxygen-containing Coal-bed Methane Based on Aspen Plus

作　　者：马代辉[1,2] 

机构地区：[1]瓦斯灾害监控与应急技术国家重点实验室,重庆400037 [2]中煤科工集团重庆研究院有限公司,重庆400039

出　　处：《矿业安全与环保》2016年第1期38-40,共3页Mining Safety & Environmental Protection

基　　金："十二五"国家科技重大专项(2011ZX05041-004-002)

摘　　要：针对低浓度煤层气深冷液化工艺,使用化工流程模拟软件Aspen Plus,对低温精馏过程进行了模拟研究,发现当原料气入口流量为552 kmol/h,精馏塔压力为0.34 MPa时,塔底液态甲烷的纯度为99%。分析了抽采煤层气流量波动对低温精馏效果的影响,发现当煤层气流量降低时,塔顶氮氧尾气中的甲烷含量增加,并且处于爆炸界限内;随着煤层气流量增加,塔底甲烷的纯度和回收率均降低。To aim at the cryogenic liquefaction technology of low-concentration coal-bed methane, simulation study was made on the cryogenic distillation process with Aspen Plus software. It was found from the study that when the inlet flow rate of the feed gas was 552 kmol/h and the pressure of the distillation column was 0. 34 MPa, the purity of the liquid methane at the column bottom was 99%. Analysis was carried out on the influence of the coal-bed methane flow rate fluctuations on the cryogenic distillation. When the flow rate of coal-bed methane decreased, the methane content in nitrogen oxide gases at the top of the column increased and was within the explosion limit;with the increase of the flow rate of coal-bed methane, the purity and recovery of the methane at the column bottom decreased.

关 键 词：低浓度煤层气 液化 精馏塔 甲烷纯度 回收率 

分 类 号：TD712.67[矿业工程—矿井通风与安全] TE644[石油与天然气工程—油气加工工程]