摘要
根据炉内燃烧和传热特点,分析了锅炉节油启动时屏式过热器底部烟气温度升高原因,并以某公司制造的600MW超临界锅炉为计算模型,对不同的入炉风量、给水温度和煤种工况下锅炉屏底烟气温度场进行了数值模拟。指出点燃褐煤,通过邻炉加热、常规油枪暖炉等方法提高炉膛温度和给水温度,适度提高入炉风量,是避免节油启动阶段屏式过热器超温及发生高温受热面氧化皮爆管的有效措施。
According to characteristics of combustion and heat transfer in boiler, the reasons for gas temperature of platen superheater bottom rise was pointed out. By means of calculation model of 600 MW supercritical boiler manufactured by Shanghai Boiler Works, temperature field in different condition of total air capacity, feed water temperature and coal rank was numerically simulated. It was found that firing lignite, raising furnace temperature and feed water temperature with neighboring boiler heating and conventional oil burner warming-up, appropriately increasing the total air capacity, were valid to prevent platen superheater from overheating and avoid the happening of high-temperature heater tube rupture because of oxide skin in period of oil-saving starting.
出处
《锅炉技术》
北大核心
2010年第6期6-10,共5页
Boiler Technology
关键词
超临界锅炉
节油
屏式过热器
烟温
数值模拟
supercritical boiler
oil saving
platen superheater
gas temperature
numerical simulation
