摘要
用数值模拟的方法对某电厂锅炉改造前和改造方案在100%BMCR负荷下的炉内燃烧进行研究。通过分析比较改造前后炉内燃烧的速度场、温度场和氧量场,得出了改后燃烧稳定性好,水冷壁结焦趋势和水冷壁发生高温腐蚀的趋势小的结论,论证了改造方案的可行性。同时根据计算中发现的改后炉膛出口烟气温度分布不均匀的现象,提出了降低分段风射入高度和提高分段风风速的改进建议。
By using a numerical simulation method a study was conducted of the in-furnace combustion at 100% BMCR(boiler maximum continuous rating) for a power station boiler prior to and after its retrofitting. Through an analysis and a comparison of field velocity, temperature and oxygen content of the boiler in-furnace combustion prior to and after its retrofitting it has been ascertained that as a result of the boiler retrofitting the in-furnace combustion is stable, the slagging and high-temperature corrosion tendency of the water wall becomes weaker. An argumentation of the boiler retrofitting has confirmed the feasibility of the adopted version of retrofitting. Meanwhile, concerning the phenomenon of non-uniform distribution of flue gas temperature at the furnace outlet after boiler retrofitting, as discovered by relevant calculations, several proposals are put forward to cope with the situation. They consist in lowering the height of injection of zoned air supply and in increasing the zoned air velocity.
出处
《热能动力工程》
EI
CAS
CSCD
北大核心
2005年第2期197-200,共4页
Journal of Engineering for Thermal Energy and Power
关键词
锅炉
燃烧
数值模拟
boiler, combustion, numerical simulation
