中国电机工程学报2018，Vol.38Issue(4)：1111-1118,后插16,9.DOI:10.13334/j.0258-8013.pcsee.170420
天然气燃料预混水蒸气的燃气轮机低氮燃烧研究
Study on DeNOxCombustion of Gas Turbine by Natural Gas Premixed With Steam
摘要
Abstract
Gas turbine power plants are confronted with the tougher NOx emission standards, and fluctuations in combustion characteristics resulted from gas source diversity. This paper studied the combustion characteristics and NOx emission in the case of an in-service F class heavy-duty gas turbine fired by natural gas premixed with steam. Based onK-ε turbulence model and finite/Eddy-Dissipation combustion model, CFD numerical simulation was carried out and validated by the field combustion adjustment data. The results show that: at the rated power load, gas temperature near the pilot nozzle is as high as about 1900 K; and gas temperature near the main combustion nozzles is as low as about 1200 K; the gas velocity of the main combustion nozzle inlet is up to 40 m/s, while 140 m/s in the outlet section. The NO concentration at standard condition and 15％ O2 reaches about 335mg/m3 near the pilot combustion nozzle, while it is significantly lower near the main combustion nozzles. In the case of natural gas premixed with steam, when the steam premixed ratio increases fromRf = 0 toRf= 0.5, the flue gas average velocity decreases from 125.3 m/s to 121.5m/s, and the average temperature decreases from 1606 K to 1594K. NO average concentration of the combustion chamber outlet gradually decreases from 24.94mg/m3 atRf = 0 to 11.79mg/m3 atRf = 0.5. At the same time, some adverse effects are produced, for example, the gas velocity is affected, the flame length becomes longer.关键词
燃气轮机/天然气预混水蒸气/燃烧特性/低氮燃烧Key words
gas turbine/natural gas premixed with steam/combustion characteristics/low-nitrogen combustion分类
能源科技引用本文复制引用
杨承,丁苏,任洪运,黄曼曼,马晓茜..天然气燃料预混水蒸气的燃气轮机低氮燃烧研究[J].中国电机工程学报,2018,38(4):1111-1118,后插16,9.基金项目
广东省能源高效清洁利用重点实验室项目(2013A061401005). Project Supported by Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization (2013A061401005). （2013A061401005）
