水冷壁管壁温度波动原因分析  

ANALYSIS ON CAUSES LEADING TO WALL-TEMPERATURE FLUCTUATION OF THE WATER-WALL TUBES

作　　者：刘勇[1] 唐必光[1] 熊立红[1] 熊光[1] 

机构地区：[1]武汉水利电力大学,湖北武汉430072

出　　处：《热力发电》2001年第2期15-17,33,共4页Thermal Power Generation

摘　　要：锅炉水冷壁金属管壁温度的波动与水冷壁管横向裂纹失效有很大的关系。以SG10 0 0锅炉和HG2 0 0 8锅炉水冷壁壁温测量结果为对象 ,根据不同的管壁温度波动特点 ,结合炉内、锅内传热分析 ,提出了不同的壁温波动原因 :炉内不稳定结渣的脱落造成了HG2 0 0 8控制循环锅炉水冷壁壁温的波动 ;蒸干传热恶化导致SG10 0The wall-temperature fluctuation of water-wall tubes is one of the important causes for transverse-cracking failure of water-wall tubes.Temperature measuring on the water-wall of HG 2008 and SG1000 boilers was carried out.Based on the results of temperature messuring and analysis on heat transfer in the boiler and furnace,different causes of wall-temperature fluctuation are proposed.For HG2008 boiler,the main cause was the shedding of unstable slag,whereas for SG1000 boiler the heat transfer deterioration due to dried-up evaporation in the tube was the main cause.

关 键 词：锅炉 不冷壁 管壁温度 横向裂纹 壁温峰值 

分 类 号：TK223.31[动力工程及工程热物理—动力机械及工程]