锅炉低氮燃烧改造对煤灰熔融特性影响  

Effect of low NOx combustion retrofit on coal ash fusion behavior of coal-fired boilers

作　　者：项群扬 殷志源 邱波 竺浩炜 裘立春 沈利 XIANG Qunyang;YIN Zhiyuan;QIU Bo;ZHU Haowei;QIU Lichun;SHEN Li(Zhejiang Provincial Key Laboratory of Energy Conservation&Pollutant Control Technology for Thermal Power,Hangzhou 311121,China;Zhejiang Zheneng Technology Research Institute Co.,Ltd.,Hangzhou 311121,China;Zhejiang YUehua Energy Testing Co.,Ltd.,Ningbo 315221,China;Zhqiang Zheneng Electric Power Co.,Ltd.,Hangzhou 310007,China)

机构地区：[1]浙江省火力发电高效节能与污染物控制技术研究重点实验室,浙江杭州311121 [2]浙江浙能技术研究院有限公司,浙江杭州311121 [3]浙江越华能源检测有限公司,浙江宁波315221 [4]浙江浙能电力股份有限公司,浙江杭州310007

出　　处：《热力发电》2020年第1期104-108,共5页Thermal Power Generation

摘　　要：为研究低氮燃烧改造对锅炉主燃区气氛以及对煤灰熔融特性的影响规律,首先对2台完成低氮燃烧改造的燃煤锅炉主燃区烟气成分进行测试,得出烟气成分分布范围;然后搭建一套气氛可调节的煤灰熔点测试系统,依据炉膛烟气成分测试结果,配制相应模拟气氛进行灰熔点测试,研究气氛变化对煤灰熔融特性的影响规律。结果表明:锅炉低氮燃烧改造后,主燃区CO体积分数由2%~3%上升至7%~15%,燃烧气氛由弱还原性气氛转变为强还原性气氛,煤灰熔点明显下降。In order to study the efifects of low NOX combustion retrofit on the atmosphere in main combustion zone of the boiler and on the coal ash fusion behavior, the compositions of flue gas in main combustion zone of two coalfired boilers after low NOX combustion retrofit were tested and the flue gas composition distribution range was obtained. Then, an atmosphere-adjustable ash fusion test system was built up. The atmosphere of the ash fusion tests were prepared to simulate the combustion area flue gas atmosphere of ttie boilers studied・ The results show that, after the low NOx combustion retrofit, the volume fraction of CO in the main combustion area increased from 2%~3% to 7%~15%, the combustion atmosphere changed from weak reducing atmosphere to strong reducing atmosphere, and the ash fusion point decreased obviously.

关 键 词：燃煤锅炉 低氮燃烧 灰熔点 熔融特性 气氛可调节 强还原性气氛 CO 

分 类 号：TK16[动力工程及工程热物理—热能工程]