微油点火稳燃技术在600MW机组中的应用

Application of Least Oil Consumption Ignition Stabilizing Technology in 600MW Unit

文章针对扬州第二发电有限责任公司600MW机组微油点火稳燃技术的应用改造,介绍了微油点火技术的工作原理、改造方案、系统组成。具体采用的改造方案为:用气化小油枪代替启动油枪,在气化小油枪燃烧器中布置煤粉浓缩装置和分级燃烧筒,实现煤粉的浓缩分级燃烧,不影响原来燃烧器的性能。改造完成后,从启动升温、升压速率、炉膛出口烟温、煤粉燃烬率、燃烧器超温结焦、NO_x排放量、微油点火改造的经济性方面进行了分析,微油点火启动过程中助燃效果好,煤粉燃烬率在99%以上。最后指出了机组微油启动过程中需注意的问题。

In light of the application - retrofit of least oil consumption ignition stabilizing technology in the 600 MW unit of Yang zhou No. 2 Power Generation Corp. Ltd., the paper briefed the working prineiple, retrofitting scheme and system confignration of least oil consumption ignition technology. The concrete adopted retrofitting scheme involved：to adopt the small gasified oil gun to replace the starting - up oil gun,in the small gasified oil gun burner to arrange pulverized coal concentration device and staging combustion tube to realize the concentration - staged combustion of pulverized coal, with the performamce of original burners not influeneed.After the retrofit was completed,the start-up heating -up and pressure rising rates,flue gas temperature at furnace outlet,burn-out rate of pulverized coal, overheating - slagging of burner,NOx emission and the economics of least oil consumption ignition etc.were analyzed, the stabilization effect of least oil consumption ignition during start - up process was good,the bum - out rate of pulverized coal was more than 99%. Finally the paper indicated the matters needing attention during the least oil consumption ignition start - up process of unit.