300MW四角切圆燃烧锅炉结焦分析及改造  

Analysis and Retrofit of Coking in a 300 MW Tangentially Fired Boiler

作　　者：陈安合 陈金顺 林宗贺 张孝勇 朱宪然 王熙 Chen Anhe;Chen Jinshun;Lin Zonghe;Zhang Xiaoyong;Zhu Xianran;Wang Xi(North China Electric Power Test and Research Institute,China Datang Corporation Science and Technology General Research Institute Co.,Ltd.,Beijing 100040,China;Hebei Datang International Tangshan Thermal Power Co.,Ltd.,Tangshan 063000,Hebei Province,China)

机构地区：[1]中国大唐集团科学技术研究总院有限公司华北电力试验研究院,北京100040 [2]河北大唐国际唐山热电有限责任公司,河北唐山063000

出　　处：《发电设备》2023年第4期264-268,共5页Power Equipment

摘　　要：为解决某300 MW火力发电机组四角切圆燃烧锅炉自配煤掺烧后频繁出现结焦的问题,进行试验并开展燃烧系统的优化改造。试验结果表明:一次风喷口面积偏小导致磨煤机出力下降,进而造成水冷壁结焦等;通过减小一次风速度,可以使磨煤机出力升高,提高锅炉带负荷的能力,并且使炉膛壁面的还原性气氛浓度下降。改造取得了良好的效果,可以为解决同类型机组的问题提供参考。For a 300 MW thermal power unit,to solve the problem of the coking occurring in the tangentially fired boiler with coal blending,tests were conducted on the unit,and the combustion system was optimized and retrofitted.Test results show that the decrease of the coal mill output is caused by the the small area of the primary air nozzle,which leads to the coking of the water wall.Through improving the coal mill output with the decrease of the primary air velocity,the boiler load can be increased,while the concentration of the reducing atmosphere near the furnace wall can be decreased.The retrofit has a good effect,which can serve as a reference for the solution of the problem in similar units.

关 键 词：锅炉 四角切圆燃烧 结焦 燃烧器 燃烧优化 

分 类 号：TK227.2[动力工程及工程热物理—动力机械及工程]