锅炉再热器管壁超温问题分析及其对策  

Analysis and solution to overheating of boiler final reheater tubes

作　　者：赵小峰[1] 沈跃良[2] 

机构地区：[1]湛江发电厂,广东湛江524099 [2]广东省电力试验研究所,广东广州510600

出　　处：《广东电力》2004年第4期82-85,共4页Guangdong Electric Power

摘　　要：对湛江发电厂第一期锅炉高温再热器管壁超温问题进行分析,得出炉膛出口局部烟气流速不均匀、流速过高和三次风的燃烧问题是引起高温再热器管壁超温的主要原因,为此,提出解决问题的对策:采用顶二次风反切技术来减少炉膛出口烟气流速偏差问题;采用三次风浓淡分离燃烧技术降低炉膛出口烟气温度,从而降低高温再热器的壁温和减温水用量。The overheating of boiler final reheater tubes in PhaseⅠof Zhanjiang Power Plant is investigated in this paper. The uneven and exceedingly high flue gas velocity in some area in the boiler outlet and the poor tertiary air combustion are deemed to be the main reasons of the problem. Two solutions are presented: one is to reverse the top secondary air nozzle by a certain angle to reduce the variation of flue gas velocity in the boiler outlet, and the other is to adopt tertiary^air bias combustion technique to decrease the exhaust gas temperature.

关 键 词：高温再热器 管壁 超温 浓淡分离 

分 类 号：TK223.3[动力工程及工程热物理—动力机械及工程]