LNG冷能空分系统多工况操作的分析  

Exergy analysis of LNG cold energy air separation system under multiple working conditions

作　　者：魏林瑞[1] 王德鹏[1] 李亚军[2] 

机构地区：[1]中海油能源发展股份有限公司北京冷能利用研究所,北京100015 [2]华南理工大学传热强化与过程节能教育部重点实验室,广州510641

出　　处：《低温与超导》2015年第6期23-28,32,共7页Cryogenics and Superconductivity

摘　　要：空分装置是高耗能过程,系统所需的温度比LNG温度还低,因此空分装置不仅使LNG冷能得到最佳利用,同时也大大降低了系统能耗。文中针对LNG夜间输气负荷降低、LNG冷量波动影响空分装置连续稳定性操作的问题,通过改变冷能空分装置的操作参数,在变负荷和产品分布等工况下进行系统的分析,揭示空分装置随LNG冷量负荷变化的系统能量的分布和利用率,从而指导空分装置如何在LNG冷能供应波动时,改变装置生产负荷及气液产品量,来维持空分装置连续稳定运行。Air separation is an energy- intensive process,which requires lower temperature than LNG temperature. Therefore,air separation unit can make the best of LNG cold energy as well as reduce the system energy consumption greatly. Considering that the fluctuation of LNG cold energy influences the continuously stable operation of the air separation unit,the research made an exergy analysis to acquire distribution and utilization ratio of system energy under different LNG output load through changing operating parameters of air separation unit such as load and production distribution. The research can guide to maintain continuously stable operation of air separation process via the change of load and vapor- liquid production ratio when LNG output load fluctuates.

关 键 词：空分 LNG 冷能 波动 分析 

分 类 号：TQ051.3[化学工程]