SMR-LNG联合液氢制取系统模拟与效益评价
Simulation and Benefit Evaluation of SMR-LNG Combined Liquid Hydrogen Production System
吴小平 1杨罗 1景秀 2沈杨旭 2黄小美2
作者信息
- 1. 中国市政工程西南设计研究总院有限公司,四川成都 610218
- 2. 重庆大学土木工程学院,重庆 400000
- 折叠
摘要
提出了一种基于LNG接收站冷能与甲烷蒸汽重整制氢过程的协同制取液氢工艺系统——SMR-LNG联合液氢制取系统,利用多流LNG换热器实现甲烷蒸汽重整制氢工艺与LNG预冷液化氢气工艺的耦合.通过Aspen HYSYS软件对所提出的工艺系统进行建模与模拟计算.当LNG供应量为50 t/h时,系统能够产出质量流量为5.89 t/h、纯度为99.99％的液氢.氢气液化子系统比能耗比传统氢气提纯及液化工艺低,利用LNG冷能具有良好的节能效益.系统中所有LNG换热器的㶲损失率为28.0％,所有反应器的㶲损失率为26.4％,所有冷却器的㶲损失率为13.3％,所有压缩机的㶲损失率为8.2％,所有膨胀机的㶲损失率为7.0％.这5类设备的㶲损失率很高,隐含着系统的节能改进机会.
Abstract
A collaborative liquid hydrogen pro-duction process system based on LNG receiving station cold energy and steam methane reforming(SMR)hy-drogen production process,SMR-LNG combined liquid hydrogen production system,is proposed.The system utilizes a multi flow LNG heat exchanger to achieve coupling between steam methane reforming hydrogen production process and LNG pre cooled liquefied hy-drogen production process.The proposed process sys-tem is modeled and simulated by Aspen HYSYS soft-ware.When the LNG supply is 50 t/h,the system can produce liquid hydrogen with a mass flow rate of 5.89 t/h and a purity of 99.99％.The hydrogen liquefac-tion subsystem has lower specific energy consumption compared to traditional hydrogen purification and lique-faction processes,and the use of LNG cold energy has good energy-saving benefits.The exergy loss rate of all LNG heat exchangers in the system is 28.0％,the ex-ergy loss rate of all reactors is 26.4％,the exergy loss rate of all coolers is 13.3％,the exergy loss rate of all compressors is 8.2％,and the exergy loss rate of all expanders is 7.0％.The exergy loss rate of these 5 types of equipment is very high,which implies the op-portunity for energy saving improvement in the system.
关键词
LNG冷能/甲烷蒸汽重整/能量效益评价/流程模拟Key words
LNG cold energy/steam methane reforming(SMR)/energy efficiency evaluation/process simulation引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据