摘要
针对某电厂将亚临界直流锅炉改为亚临界控制循环锅炉,对燃烧器进行了相关改造,研究分析了燃烧器改造前、后机组运行的变化,并根据改造前、后的机组运行结果进行了改变省煤器出口氧量、改变二次风配风方式和改变SOFA风风门开度等试验.结果表明:机组在300 MW负荷下,宜采用较高的运行氧量,二次风宜采用均布配风方式,SOFA风风门宜全开以及在燃烧器布置时,底层起转二次风的偏转角与位置需与一次风的假象切圆大小相配合等.同时,对机组运行存在的塌焦现象进行了初步分析,并提出了相关解决方案.
The subcritical once-through boiler was retrofitted into a controlled circulating boiler in certain power plant,and correlative retrofit was also performed to the burners.The operational variation of the unit before and after retrofit of the burners was studied and analyzed.Based on the operational results before and after retrofit,some tests were conducted,such as changing the oxygen content at the exit of the economizer,changing the mode of secon-dary air distribution and changing the opening of the SOFA damper.Results show that under the load of 300 MW,the unit should adopt higher oxygen content,the secondary air should take uniform air distribution mode,and the SOFA damper should be completely opened.For the arrangement of the burners,the deflection angle and position of the bottom layer secondary air should be matched with the size of the imagined tangential circle of the primary air.Primary analysis was carried out for the slagging phenomena of the unit during operation,and correlative countermeasures were presented.
出处
《动力工程学报》
CAS
CSCD
北大核心
2010年第7期502-507,共6页
Journal of Chinese Society of Power Engineering
关键词
亚临界直流锅炉
亚临界控制循环锅炉
改造
低NOx切向燃烧系统
燃烧优化
飞灰含碳量
塌焦
subcritical once-through boiler
subcritical controlled circulating boiler
retrofit
low NO_x tangential firing system
combustion optimization
carbon content in fly ash
slagging
