摘要
利用具有滴管炉和固定床特点的试验反应系统,研究了3种典型原煤样品在热解和燃烧过程中硫的析出和迁移特性,得到煤种、温度、升温模式和过量空气系数对硫析出特性的影响规律.通过煤粉燃烧模拟电站锅炉烟气气氛,研究了硫及其化合物对水冷壁管高温腐蚀的影响.对腐蚀试样表面的微观分析表明:温度越高、过量空气系数越小,腐蚀试样表面氧化皮越厚;随着温度升高,气相含硫产物转化率提高.
Making use of an experimental system, which combines features of drop-tube furnace and fixed bed, sulfur release and migration characteristics of three typical coal samples during pyrolysis and combustion process were studied, while the law, how coal category, temperature, heat-up pattern and excess air coefficient influence the sulfur release characteristics, obtained. By simulating flue gas atmosphere of power plant boilers, the high-temperature corrosion influence of sulfur and sulfide on water wall tubes was analyzed. Results of micro-analysis on corroded surface of test samples show that the higher the temperature, the smaller the excess air coefficient, the thicker the oxide scale will be; with the rise of temperature, more gaseous-state sulfur-containing compounds will be generated.
出处
《动力工程》
CAS
CSCD
北大核心
2009年第9期868-874,共7页
Power Engineering
基金
"十一五"国家科技支撑计划课题资助项目(2006BAK02B03)
关键词
热解
燃烧
硫的析出和迁移特性
高温腐蚀
锅炉水冷壁
pyrolysis
combustion
sulfur release and migration characteristic
high-temperature corrosion
boiler water walls
