600MW超临界无烟煤“W”火焰锅炉低温过热器超温缘故分析Cause Analysis on Overheating in the Low Temperature super-heater for a W-shaped Flame Anthracite Coal Boiler of 600 MW Supercritical Unit黄伟 1，李文军 1，彭敏 1，熊蔚立 1，陈跃华 2，谢小红 2，邹自敏 21 湖南省电力公司试验讨论院，湖南 长沙市 410007 ；2 大唐华银金竹山火力发电分公司，湖南 冷水江市 417505HUANG Wei1, LI Wen-jun1, PENG Min1 , XIONG Wei-li1, CHEN Yue-hua2, XIE Xiao-hong2, ZOU Zi-min2,1 Hunan Electric Power Test and Research Institute, Changsha 410007, China2 Datang Huayin Jinzhushan Thermal Power Generation Branch Company, Lengshuijiang 417505,China关键词：600MW 超临界机组；“W”火焰锅炉；无烟煤；低温过热器；超温中图分类号：TK227.1 文献标识码： 文章编号：Abstract: Overheating existed in low temperature super-heater while debugging in W-shaped flame anthracite coal boiler of 600 MW supercritical unit of Datang Huayin Jinzhushan Thermal Power Generation Branch Company. Lower temperature, rich oxygen, bad combustion of reprocessing oil, thoroughly unburn-off of combustible matter collected on tail part However “secondary combustion” occurred when the heat released, which were caused low temperature super-heater overheating. Therefore, air register was turned 100mm（50%）into 130mm（65%）, inner-outer secondary air ratio was changed, secondary air box differential pressure was increased to 1.2～1.4kPa, air was controlled between 756 ～ 900t/h, meanwhile, measurements were taken by improving reprocessing oil combustion, increasing oil to 22 ～ 25t/h before coal combustion, improved furnace temperature, slowly open load door for reducing thermal increasing rate when the first mill operating, shutting down grading air and increasing upper air, lowering flame centre, enhancing horizontal and tail fl...
