摘要
针对220 t/h锅炉因燃用煤种变化出现较严重的结渣问题,提出了将燃烧器一次风反切的改造方案.用数值模拟的方法对改造前和改造方案在10000/BMCR负荷下的炉内燃烧参数进行研究.通过分析、比较改造前后炉内燃烧的速度场、温度场、氧量场以及煤粉颗粒分布,发现改造后水冷壁的结焦趋势小,论证了改造方案的可行性.
The coal shift in the 220 t/h power plant results in serious slagging in the furnace. To ease the slagging problem, a retrofit proposal was made to change the primary air jets in reverse tangential, arrangement to the secondary air jets. Numerical simulations were carried out to investigate the in-furnace combustion parameters at 100% BMCR （boiler maximum continuous rating） load of pre-and post-retrofit cases. Comparative analyse of the velocity, temperature, oxygen fields and coal dust distribution in pre- and post-retrofit cases show that the slagging tendency after retrofit proposal will come down, demonstrating the feasibility of the retrofit proposal.
出处
《燃烧科学与技术》
EI
CAS
CSCD
北大核心
2007年第1期91-95,共5页
Journal of Combustion Science and Technology
关键词
锅炉
燃烧
结渣
数值模拟
boiler
combustion
slagging
numerical simulation
