化工学报2011，Vol.62Issue(5)：1471-1477,7.DOI:10.3969/j.issn.0438-1157.2011.05.044
含氧煤层气液化流程爆炸极限分析
Analysis of flammability limits for liquefaction process of oxygen-bearing coal-bed methane
摘要
Abstract
Most of oxygen-bearing coal-bed methane (CBM) has not been utilized due to the limit in technique for production. The discharged gas leads to not only the waste of resources but also environmental pollution. In this study, a liquefaction process is proposed and designed for the typical CBM. HYSYS software is adopted to simulate the process. The flammability limits are analyzed and calculated based on the flammability limit theory and the simulated results of HYSYS. The results indicate that no flammable hazards exist in the processes of compression, liquefaction and throttling but they may appear at the top of the distillation tower. A method, in which oxygen is first removed from the feed gas with the control of the bottom flowrate (flowrate of the liquid product at column bottom), is adopted to ensure that the methane content is always higher than the flammability limit in the whole liquefaction and distillation processes, so that the operation safety of the whole process is very high. The methane recovery rate and the purity of liquid product are high with low energy consumption. Furthermore, the liquefaction process has good applicability for other gas resources. The simulation results can offer references for the separation of oxygen from CBM and security analysis of liquefied process.关键词
含氧煤层气/液化/精馏/爆炸极限Key words
oxygen-bearing coal-bed methane/ liquefaction/ rectification/ flammability limits分类
能源科技引用本文复制引用
李秋英,王莉,巨永林..含氧煤层气液化流程爆炸极限分析[J].化工学报,2011,62(5):1471-1477,7.基金项目
哈尔滨市科技创新人才研究专项资金项目(RC2008QNOOT002) （RC2008QNOOT002）
教育部新世纪优秀人才支持计划项目(NCET-07-0544). （NCET-07-0544）
