Numerical study of an 870MW wall-fired boiler using De-NOx burners and an air staging system for low rank coal
Numerical study of an 870MW wall-fired boiler using De-NOx burners and an air staging system for low rank coal
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使用脱硝燃烧器和低阶煤空气分级系统的 870MW 壁燃式锅炉的数值研究
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
C. Jeon
中科院分区：
文献类型：
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作者：
Min;Seokgi Ahn;Ho;Gyu;C. Jeon
在韩国，煤粉锅炉已用于发电数十年。最近，一个870兆瓦的墙烧锅炉与De-NOxTM燃烧器和空气分级系统的建设使用低阶煤。其燃烧特性的全尺寸模拟的结果与在正常操作条件下获得的温度，未燃碳和一氧化氮的测量结果一致。对比未燃烧的碳和氮氧化物的排放量的趋势进行了观察，这取决于颗粒大小和备用燃烧器在锅炉内的位置。燃烧也被发现转移与小颗粒尺寸和大颗粒尺寸向后。热机械分析（TMA）结果表明，实际粘结温度低于初始变形温度（ASTM）标准所建议的温度。使用逻辑函数来描述TMA收缩。受高沉积电位的位置进行了预测，参考吹灰现象。
Pulverized coal-fired boilers have been used for power generation in Korea for decades. Recently, an 870-MW wall-fired boiler with De-NOxTM burners and an air staging system was constructed for use with low-rank coal. The results of a full-scale simulation of its combustion characteristics agreed well with measurements obtained under normal operating conditions for temperature, unburned carbon, and nitric oxide. Contrasting trends in unburned carbon and NOx emissions were observed, depending on the particle size and the location of the standby burner within the boiler. Combustion was also found to shift forward with small particle sizes and backward with large particle sizes. The results of a Thermo-mechanical analysis (TMA) indicated that the actual sticking temperature was lower than that suggested by the initial deformation temperature (ASTM) criteria. A logistic function was used to describe TMA shrinkage. Locations subject to high deposition potential were predicted with reference to soot-blowing phenomena.