600MW燃煤机组降低NO_x调整及技术改进

发布时间：2018-01-11 01:04

本文关键词：600MW燃煤机组降低NO_x调整及技术改进　出处：《华北电力大学》2015年硕士论文　论文类型：学位论文

【摘要】：某公司2×600MW汽轮发电机组,锅炉为上海锅炉厂设计和制造,型号为SG2059/17.5-M915。在正常运行时NOx排放在650mg/m3以上,NOx不能达到国家排放标准,故对2台机组进行低氮燃烧运行调整、低氮燃烧器改造。经过改造和运行试验,实现了NOx排放在260mg/m3以下,达到降低NOx排放的要求。本文在绪论部分阐述了低氮改造的背景意义,介绍了国内外先进的低氮燃烧器改造技术。针对燃烧器低氮改造后,对机组进了一个多月的燃烧热态调试实验,在热态实验中,通过对该炉热态过程中的燃烧调整性试验及相关数据采集、分析及调整,使低氮改造后的机组燃烧器处于最佳运行状态,锅炉各项性能指标达到甚至优于设计要求。为今后锅炉低氮燃烧器改造后的长期稳定、经济、环保运行提供可靠的数据支持。对锅炉改造后,配合电科院进行了多次试验,对锅炉超温超越进行了分析,针对具体原因采取具体对应措施,有效控制了超限次数。通过燃烧器低氮改造,NOx的排放量平均下降约40%、炉渣含碳量明显降低、锅炉结焦问题得到了极大的改善、吹灰次数明显减少,通过优化运行调整,汽温汽压壁温运行超限次数逐月减少,得到了很好的控制。最后,本文提出了对燃烧器低氮改造的技术展望。
[Abstract]:The boiler of 2 脳 600MW steam turbine generator set in a certain company is designed and manufactured by Shanghai Boiler Plant. Model SG2059 / 17.5-M915. at normal operation, NOx emissions above 650 mg / m ~ 3 can not meet the national emission standards. Therefore, the operation adjustment of low nitrogen combustion and the revamping of low nitrogen burner are carried out on two units. Through the revamping and operation test, the NOx emission is below 260 mg / m 3. In the introduction part, the background significance of low nitrogen revamping is expounded, and the advanced low nitrogen burner revamping technology at home and abroad is introduced. In the hot state experiment, the combustion adjustment test and related data acquisition, analysis and adjustment are carried out for more than one month. The burner of low nitrogen revamping unit is in the best operation condition, and the performance index of the boiler is even better than the design requirement, which is the long-term stability and economy of the boiler low nitrogen burner revamping in the future. The environmental protection operation provides reliable data support. After retrofitting the boiler, several tests have been carried out in cooperation with the Institute of Electric Science, and the boiler overtemperature surpassing has been analyzed, and specific corresponding measures have been taken in view of the specific reasons. The emission of no _ x is reduced about 40%, the carbon content of slag is obviously reduced, the problem of boiler coking has been greatly improved, and the number of soot blowing has been obviously reduced. By optimizing operation adjustment, the number of excess operation of steam temperature and steam pressure wall temperature is reduced month by month, and good control is obtained. Finally, the technical prospect of low nitrogen revamping of burner is put forward in this paper.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM621

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