超超临界压力切圆燃烧锅炉掺煤高钠煤NO_x排放特性试验研究  

Experimental Study on NO_x Emission of an Ultra-Supercritical Pressure and Tangentially-Fired Boiler with Mixture of High Sodium Coal

作　　者：何洪浩 李文军 程刚 曾俊 HE Hong-hao;LI Wen-jun;CHENG Gang;ZENG Jun(Hunan Xiangdian Test & Research Institute Co.Ltd.,Changsha,China,Post Code:410000;Hunan Province KeyLaboratory of Efficient & Clean Thermal Power Generation Technologies,Changsha,China,Post Code:410000)

机构地区：[1]湖南省湘电试验研究院有限公司,湖南长沙410000 [2]高效清洁火力发电技术湖南省重点实验室,湖南长沙410000

出　　处：《热能动力工程》2019年第3期109-113,共5页Journal of Engineering for Thermal Energy and Power

摘　　要：以660 MW超超临界压力切圆燃烧直流锅炉为对象,对掺烧高钠煤时的NO_x排放特性进行了试验研究。结果表明:NO_x排放值随SCR入口处氧量的增加而增加,100%额定负荷下,高钠煤掺烧比例为80%时,O_2体积分数控制在3%为宜; 50%额定负荷下,高钠煤掺烧比例为50%时,O_2体积分数控制在4.7%为宜;随着分离式燃尽风(SOFA)的增加,NO_x排放值降低;调节燃烧器摆角可改变分级燃烧效果,提高高钠煤掺烧比例和采用下5台磨运行组合方式能有效降低NO_x排放浓度。With a 660 MW ultra-supercritical pressure once-through boiler,a series of experiments on NOx emission were conducted with coal-feed composed of certain proportion of Shenhua coal.The experiment results revealed that NOx emission increases with O2(measured at SCR entrance).O2 content is recommended to be 3% at 100% load with the proportion of Shenhua coal being 80%,and 4.7% at 50% load with proportion of Shenhua coal being 50%.NOx emission increases with seprate-over-fire(SOFA) as expected.The angle of combustor can also alter air-staged combustion,facilitating the control of NOx emission.I Increasing proportion of Shenhua coal and using bottom group of coal mill could reduce NOx emission as while.

关 键 词：超超临界压力 高钠煤 NOX排放 试验研究 

分 类 号：TK227.1[动力工程及工程热物理—动力机械及工程]