低碳化学与化工2026，Vol.51Issue(4)：145-154,10.DOI:10.12434/j.issn.2097-2547.20250083
LNG冷能驱动的轻烃回收与空气分离集成工艺设计与优化
Design and optimization of integrated process of light hydrocarbon recovery and air separation driven by LNG cold energy
摘要
Abstract
To improve the ethane recovery rate,cold energy utilization rate and exergy efficiency in light hydrocarbon recovery processes,and to enhance the comprehensive utilization efficiency of LNG cold energy,an integrated process of light hydrocarbon recovery and air separation driven by LNG cold energy was proposed.Using ethane recovery rate,system power consumption,cold energy utilization rate,exergy efficiency and net present value as evaluation indicators,the effects of key parameters on system performance were investigated,along with multi-objective optimization,exergy analysis,and comprehensive economic(net present value)evaluation.The results show that the demethanizer inlet pressure and temperature,the inlet temperature of distillation column 1 and the air mass flow rate have significant impacts on system performance.After multi-objective optimization,the process achieves an ethane recovery rate of 94.79%,a system power consumption of 4.27×104 kW,a cold energy utilization rate of 88.20%,an exergy efficiency of 84.66%and a net present value of 294.8×108 CNY.Exergy analysis of equipment indicates that the combined exergy losses of compressors,distillation columns and heat exchangers account for more than 85%of the total losses,representing key links for improving system energy efficiency.The proposed process demonstrates significant advantages in cold energy cascade utilization,ethane recovery and exergy efficiency,while exhibiting both technical feasibility and economic competitiveness,thus can provide a new approach for coupling LNG cold energy with chemical separation processes.关键词
LNG冷能驱动/轻烃回收/冷能利用率/多目标优化/㶲分析/净现值Key words
LNG cold energy-driven/light hydrocarbon recovery/cold energy utilization rate/multi-objective optimization/exergy analysis/net present value分类
化学化工引用本文复制引用
屈乐,刘元杰,潘杰,唐斐然,李冉..LNG冷能驱动的轻烃回收与空气分离集成工艺设计与优化[J].低碳化学与化工,2026,51(4):145-154,10.基金项目
国家自然科学基金(52274064,51774237). （52274064,51774237）
