LM2500+G4型燃气-蒸汽联合循环机组余热加热天然气的技术经济分析

Technical and economic analysis of natural gas heating by waste heat of LM2500 + G4 gas-steam combined cycle generator

LM2500+G4型燃气-蒸汽联合循环发电机组利用余热锅炉尾部余热加热天然气进气系统,天然气进气温度按照常规20℃计,分别将燃气温度加热到30~80℃。通过对比分析,将天然气加热至80℃时技术经济性能最优,不仅显著提高了以LM2500+G4燃机为核心的分布式能源系统的综合能源利用率,还提高了机组运行的经济性、可靠性及安全性,有效防止了低温腐蚀。

The LM2500 + G4 gas-steam combined cycle generator makes use of the waste heat from the HRSG to heat the natural gas intake system. The intake gas temperature is 20 ℃ normally and will be heated to 30 ～ 80 ℃. Through comparative analysis,the technical and economic performance is optimalwhen heating natural gas to 80 ℃,which not only significantly improves the comprehensive energy utilization efficiency of distributed energy system with LM2500 + G4,but also improve the economy,reliability and safety of the generator. Low temperature corrosion can be effectively prevented.