重型燃气轮机DLN2.0+系统燃烧调整实践

摘要

In order to improve the operation and maintenance quality of the gas turbine , and master the regularity of its DLN combustion tuning, in this paper, the tuning rules are summarized through the practice with DLN 2.0+ system of the gas turbine. The study shows that the dynamic pressure fluctuation in each frequency band and the NOxemission can be balanced by the adjustment of purge air quantity and the PM1 fuel ratio. When the content of NO2in the exhaust gas exceeds a certain concentration level during the gas turbine start-up, the visible "yellow plume" will appear. Through switching to the piloted premix mode as early as possible, and minimizing the fuel ratio of D5 and PM1, the impact of "yellow plume" during the gas turbine starting up process can be alleviated.%为提高燃气轮机运行维护水平,掌握燃气轮机干式低NOx(DLN)燃烧调整规律,通过燃气轮机DLN2.0+系统燃烧调整实践,总结了燃气轮机燃烧调整规律.研究表明通过对清吹空气量、预混燃料1(PM1)比例的调整可以平衡各频段的燃烧动态压力波动及NOx的排放水平;燃气轮机启动运行中出现可见"黄烟"是由于排烟中NO2的质量分数超过了一定数值,通过尽早切换到先导预混模式,以及在先导预混模式尽量减少扩散燃料(D5)和预混燃料1(PM1)的比例,可以减轻燃气轮机启动过程中"黄烟"的环境影响.