基于Aspen HYSYS的沼气中CO_2气体低温液化分离技术  

Low Temperature Liquid Separation Technology of CO_2 from Biogas Based on Aspen HYSYS

作　　者：周淑霞[1] 董玉平[1] 张玉林 孙宏宇[1] 

机构地区：[1]山东大学高效洁净机械制造教育部重点实验室,济南250061 [2]山东绿能燃气实业有限责任公司,菏泽274000

出　　处：《农业机械学报》2011年第8期111-116,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：山东省自然科学基金资助项目(ZR2009EZ001)

摘　　要：基于沼气主要成分CH4气体和CO2气体物理性质的差异,利用PR方程,得出不同CH4体积分数下,沼气泡点和露点的温度和压力;在Aspen HYSYS平台中,设计了低温液化分离沼气中CO2气体的流程,仿真分析了低温液化对CH4体积分数和CO2体积分数的影响。根据低温液化分离沼气中CO2气体的流程,对沼气进行纯化实验,结果表明:实验结果与模拟结果相吻合;液化分离后CH4体积分数从58.2%升至82.8%,CO2体积分数由36.4%降至8.8%,N2+O2体积分数小于4.0%。According to the differences in physical properties between CO2 and CH4,the temperature and pressure of bubble point and dew point of the biogas with different volume fractions could be obtained with PR equation.Based on Aspen HYSYS,the liquefaction process of separating CO2 from biogas was designed.The effects of low temperature liquid separation on CO2 and CH4 from biogas were analyzed.The experiment of biogas purification was carried out and the result was consistent with that of simulation.The results of the experiment showed that the volume fraction of CH4 increased from 58.2% to 82.8%,the volume fraction of CO2 decreased from 36.4% to 8.8%,and the volume fraction of N2＋O2 was less than 4.0%.

关 键 词：沼气 液化流程 杂质分离 气液相平衡 ASPEN HYSYS 

分 类 号：TK6[动力工程及工程热物理—生物能]