【摘要】 针对CO₂-EOR采出气（CO₂摩尔分数为88.15%）,应用HYSYS软件数值研究低温分馏四塔双产品回收工艺。设计了三种增压方案并进行了对比分析,确定了最优增压方案;分析了乙烷回收塔、添加剂回收塔塔底温度与单位能耗和CO₂产量之间的关系,以及添加剂循环量对CO₂产量、CO₂产品纯度的影响。在该模拟条件下,乙烷回收塔和添加剂回收塔塔底最优温度分别为130℃和135℃,最优添加剂循环量为64.64kmol/h,此时,CO₂产品纯度最高为99.04%。更多还原

【Abstract】 Using HYSYS software,simulated analysis was carried out on cryogenic fractional distillation process for CO₂-EOR associated gas（88.15% CO₂ molar fraction）to realize double products recovery.Three kinds of pressurization scheme were designed and analyzed to determine the optimal scheme.The relationships between cold/heat load and the CO₂ output and column bottom temperature of ethane recovery tower and additive recovery tower were analyzed.The influence of additive circulation flow rate on CO₂ product output and purity was also analyzed.Under the simulated conditions,the numerical results indicated that column bottom optimal temperature was 130℃for ethane recovery tower and 135 ℃ for additive recovery tower respectively,optimal additive circulation flowrate was 64.64kmol/h and CO₂ product purity was up to 99.04%.更多还原