摘要
为解决某165t/h循环流化床(CFB)锅炉低负荷运行灰渣碳含量高、锅炉效率低、调峰负荷受限等问题,进行锅炉燃烧优化研究。研究结果表明,通过设计和增加循环灰排灰系统,锅炉低负荷运行工况得到改善,80 t/h负荷下,锅炉床温由724℃升至861℃,灰渣平均可燃物含量由24.85%降至5.65%,锅炉热效率提高3.27%,NO_(x)排放量保持平稳,SO2含量略有增加。燃烧优化还使锅炉调峰能力增强,安全负荷由80 t/h降至60 t/h,可节约生产成本4 464万元/a,锅炉运行安全性和经济性进一步提高。
A circulating fluidized bed( CFB) boiler of the 165t/h unit had problems such as high carbon content in bottom ash and fly ash,low boiler thermal efficiency and limited peak load and so on,combustion optimizing was carried out to solve these problems. The results show that the low load operation condition of the boiler is improved by adding circulating ash discharge system. Under 80 t/h load,the bed temperature of the boiler increases from 724℃ to 861℃,the average carbon content in bottom ash and fly ash decreases from24.85% to 5.65%,the boiler thermal efficiency of the boiler increases by 3.27%,the NO_(x) emission remains stable and the SO2 increases slightly. Combustion optimization also enhances the peak load regulation capacity of the boiler. The safe load is reduced from 80 t/h to60 t/h. The annual production cost can be saved by 44.64 million yuan.
作者
袁文杰
贾小平
李楠
孙献斌
赵鹏勃
YUAN Wenjie;JIA Xiaoping;LI Nan;SUN Xianbin;ZHAO Pengbo(Jiangxi Yichun Jingneng Thermal Power Co.,Ltd.,Yichun 336000,China;Huaneng Clean Energy Research Institute Co.,Ltd.,Beijing 102209,China;State Key Laboratory of Coal Based Clean Energy,Beijing 102209,China)
出处
《洁净煤技术》
CAS
2020年第S01期172-175,共4页
Clean Coal Technology
关键词
循环流化床锅炉(CFB)
燃烧优化
灰渣平均可燃物
锅炉热效率
循环灰
circulating fluidized bed boiler
combustion optimizing
average carbon content in bottom ash and fly ash
boiler thermal efficiency
circulating ash
