基于Aspen Adsorption的He/N2变压吸附过程模拟优化
安杰 , 刘霄 , 李凌云 , 吴学谦 , 林洪南 , 范峥
现代化工 ›› 2026, Vol. 46 ›› Issue (5) : 204 -210.
基于Aspen Adsorption的He/N2变压吸附过程模拟优化
Simulation and optimization of pressure swing adsorption process for He/N2 using Aspen Adsorption
针对液化天然气蒸发气(BOG)中氦气精制的技术难题,基于Aspen Adsorption软件,建立了包含质量、能量和动量守恒方程的多尺度耦合模型的新型变压吸附(PSA)氦气精制工艺。系统地对吸附剂进行对比筛选,继而考察了操作参数对分离性能的影响。在工艺设计方面,拓展性地提出了双塔PSA工艺方案,引入均压和真空解吸步骤。结果表明,CMS-5000-A型碳分子筛的孔径范围及适用条件均符合N2/He分离条件,表现出优异的分离性能,其对N2/He的选择性吸附比达到87.5∶1。当吸附压力控制在0.3~0.4 MPa时,氦气回收率可提高15%以上;吸附床高度在1.0~1.1 m范围内时,既能保证产品纯度 >99.99%,又能使能耗维持在较低水平。使氦气回收率从单塔系统的84.7%提升至89.8%。结合贝叶斯算法优化方法,新工艺能耗较传统深冷法降低52%~68%。该工艺具有启动时间短、操作弹性大等优势,为工业级氦气提纯提供了可靠的技术方案。
To address the technical challenges of helium purification from liquefied natural gas boil-off gas (BOG),a novel pressure swing adsorption (PSA) helium refining process was developed based on Aspen Adsorption software,incorporating a multi-scale coupled model that includes mass,energy,and momentum conservation equations.A systematic comparison and screening of adsorbents were conducted,followed by an investigation of the impact of operational parameters on separation performance.In terms of process design,an innovative dual-tower PSA process was proposed,incorporating pressure equalization and vacuum desorption steps.The results demonstrate that the CMS-5000-A carbon molecular sieve exhibits excellent separation performance,with its pore size range and operating conditions well-suited for N2/He separation,achieving a remarkable selectivity ratio of 87.5∶1 for N2/He.When the adsorption pressure is maintained between 0.3-0.4 MPa,helium recovery rate increases by over 15%.With an adsorption bed height of 1.0-1.1 m,the product purity >99.99% while maintaining low energy consumption.The dual-tower PSA process improves helium recovery from 84.7% in a single-tower system to 89.8%.Combined with Bayesian algorithm optimization,the new process reduces energy consumption by 52%-68% compared to traditional cryogenic methods.This process offers advantages such as short startup time and large operational flexibility,providing a reliable technical solution for industrial-scale helium purification.
氦气精制 / 贝叶斯算法 / Aspen Adsorption / 碳分子筛 / 变压吸附
helium purification / bayesian algorithm / Aspen Adsorption / carbon molecular sieve (CMS) / pressure swing adsorption (PSA)
| [1] |
陈兵, 任金平, 孟国亮, |
| [2] |
周起忠, 闫卫东, 胡容波, |
| [3] |
肖永厚, 肖红岩, 李本源, |
| [4] |
|
| [5] |
王鹏, 刘京雷, 张胜中, |
| [6] |
王金波, 白宸瑞, 宋晓娟, |
| [7] |
张丽萍, 巨永林. 基于深冷—膜分离的天然气蒸发气联合提氦流程模拟与效果对比[J]. 天然气工业, 2023, 43(8):170-182. |
| [8] |
卜令兵, 伍毅, 殷文华, |
| [9] |
刘本旭, 宋宝东. 用Aspen Adsorption模拟氯化氢脱水[J]. 化学工业与工程, 2012, 29(2):58-62. |
| [10] |
|
| [11] |
|
| [12] |
|
| [13] |
刘其武, 高卓然, 胡亚琼, |
| [14] |
李均方, 张瑞春, 何伟. 变压吸附在粗氦纯化工艺中的流程优化研究[J]. 石油与天然气化工, 2022, 51(3):47-55. |
| [15] |
孙康. 基于人工神经网络的多层床变压吸附氢气纯化性能的优化[D]. 武汉: 武汉理工大学, 2022. |
| [16] |
|
| [17] |
张妍, 李洪峻, 董志明, |
| [18] |
孙琳, 刘志雄, 罗文波, |
| [19] |
高虹雷, 门昌骞, 王文剑. 多核贝叶斯优化的模型决策树算法[J]. 国防科技大学学报, 2022, 44(3):67-76. |
| [20] |
黄晓芙. 基于贝叶斯优化的成矿动力学数值模型参数校正及条件推断[D]. 长沙: 中南大学, 2022. |
| [21] |
张晶, 裴东兴, 马瑾, |
| [22] |
朱博文, 龚懿, 陈再扬, |
| [23] |
朱博文. 基于Pareto最优解的调水泵站多目标优化运行方法研究[D]. 扬州: 扬州大学, 2023. |
国家自然科学基金项目(22308277)
中国国家留学基金项目(201908610135)
/
| 〈 |
|
〉 |