摘要
[目的]为了解决电站锅炉深度调峰过程中出现稳燃差、水动力不稳定、SCR入口烟温过低等问题,锅炉稳燃改造势在必行。[方法]文章以某660 MW火电机组锅炉灵活性改造为例,提出了两种有效的稳燃改造方案,分析了燃烧及制粉系统改造后对炉膛和NO_(x)排放影响。[结果]两种改造方案均可提升锅炉超低负荷稳燃特性,燃烧及制粉系统改造后对炉膛和NO_(x)排放影响小,在技术可靠性、施工难度及工作量等方面水平相当,相比之下方案一略优。[结论]两种改造方案经理论验证切实可行,可为同类型机组进行灵活性改造提供技术参考。
[Introduction]In order to solve the problems of poor stable combustion,unstable hydrodynamics,and too low SCR inlet flue gas temperature during the deep peak shaving process of power station boilers,it is imperative to reform the boiler to stabilize combustion.[Method]In this paper,taking the flexibility transformation of a 660 MW thermal power unit boiler as an example,two effective stable combustion transformation schemes were proposed,and the effects of the combustion and pulverizing system transformation on the furnace and NOemissions were analyzed.[Result]Both retrofit schemes can improve the ultra-low load and stable combustion characteristics of the boiler.The retrofit of the combustion and pulverizing system has little impact on the furnace and NOemissions and is comparable in terms of technical reliability,construction difficulty,and workload.In contrast,scheme 1 is slightly better.[Conclusion]The two transformation schemes have been theoretically verified and feasible,and can provide technical reference for flexible transformation of the same type of units.
作者
陈江涛
李强
彭丹
吴珂
孙为民
CHEN Jiangtao;LI Qiang;PENG Dan;WU Ke;SUN Weimin(School of Energy and Power Engineering,Zhengzhou Electric Power College,Zhengzhou 450004,Henan,China;Power China Sinohydro Bureau 3 Co.,Ltd.,Xi'an 710024,Shanxi,China)
出处
《南方能源建设》
2022年第3期148-152,共5页
Southern Energy Construction
基金
河南省科技厅软科学研究项目“河南省热电联产余热利用及老旧城区供热能力提升实施路径研究”(202400410109)
河南省教育厅重点科研项目“吸收式大温差热力站运行特性及供热能力提升研究”(21B480005)
河南省社科联调研课题“河南省城镇供热热源供热能力和余热利用调研研究”(SKL-2020-2924)
校内科研项目“吸收式大温差热力站运行特性及性能优化研究”(ZEPCKY2021-14)。
关键词
电站锅炉
灵活性改造
锅炉稳燃
燃烧器改造
制粉系统改造
power station boiler
flexibility transformation
boiler stable combustion
burner retrofit
pulverizing system retrofit
