四角切圆燃烧锅炉主、再热蒸汽汽温偏差和管壁超温的分析及处理  

TEMPERATURE DEVIATION BETWEEN MAIN AND REHEAT STEAM AND TUBE-WALL OVERTEMPERATURE FOR TANGENTIALLY-FIRED BOILER: ANALYSIS AND TREATMENT

作　　者：孙育英[1] 王志刚[2] 陈国辉[2] 

机构地区：[1]北京工业大学建工学院,北京100124 [2]西安热工研究院有限公司,陕西西安710032

出　　处：《热力发电》2012年第8期48-50,共3页Thermal Power Generation

摘　　要：对A电厂660MW机组和B电厂680MW机组四角切圆燃烧锅炉采用调整燃尽风水平摆角方法解决锅炉主、再热蒸汽温度偏差和管壁超温的措施进行试验。结果表明,调整燃尽风水平摆角改变了燃尽风的切圆大小,进而改变了烟气流在出炉膛时的流场分布。A电厂6号机组和B电厂5号机组调整AA风摆角后,两侧主蒸汽温度差消除,过热器壁温降低,且不再超温。To solve the problems like temperature deviation between main and reheat steam and tube-wall overtemperature,experiment about regulating the horizontally offset angle of over-fire air was conducted,on tangentially-fired boiler for 660 MW unit in power plant A and 680 MW unit in power plant B.Results show that,regulating the horizontally offset angle of over-fire air can alter the size of tangential circle,so as to change the flow field distribution of flue gas at the outlet of furnace.For No.6 unit in power plant A and No.5 unit for power plant B,after the regulation,temperature deviation between main and reheat steam is eliminated,besides,the wall temperature of superheater decreases.

关 键 词：锅炉 四角切圆 燃尽风 水平摆角 汽温偏差 超温 

分 类 号：TK16[动力工程及工程热物理—热能工程]