引用本文:张足斌,王冬旭,王海琴,范美玉,潘俐敏. CO2-EOR采出气双产品回收工艺分析与优化[J]. 石油与天然气化工, 2016, 45(2): 39-42.
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CO2-EOR采出气双产品回收工艺分析与优化
张足斌1,2,王冬旭2,王海琴1,2,范美玉2,潘俐敏2
1.中国石油大学(华东)储运与建筑工程学院;2.山东省油气储运工程重点实验室
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64.64 kmol/h,此时,CO2产品纯度最高为99.04%。 
关键词:  低温分馏  数值分析  参数优化  双产品回收 
DOI：10.3969/j.issn.1007-3426.2016.02.008
分类号:TE99
基金项目:国家自然科学基金项目“海上天然气净化脱CO2过程吸附/脱附特性研究”(51306210)。
Numerical analysis and optimization of double products recovery process for CO2-EOR associated gas
Zhang Zubin1,2, Wang Dongxu2, Wang Haiqin1,2, Fan Meiyu2, Pan Limin2
(1. College of Pipeline and Civil Engineering of China University of Petroleum, Qingdao 266580, China;2. Provincial Key Laboratory of Oil & Gas Storage and Transportation Engineering, China University of Petroleum, Qingdao 266580, China)
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 64.64 kmol/h and CO2 product purity was up to 99.04%.
Key words:  cryogenic fractionation  numerical analysis  parameter optimization  double product recovery