低NO_x切向燃烧系统的改造及性能优化试验  

Retrofit and Performance Optimization Test of the Low NO_x Tangential Firing System

作　　者：宁新宇[1] 梁绍华[1] 岳峻峰[2] 张恩先[1] 黄磊[1] 

机构地区：[1]江苏方天电力技术有限公司,南京211102 [2]江苏省电力试验研究院有限公司,南京210029

出　　处：《动力工程学报》2010年第7期502-507,共6页Journal of Chinese Society of Power Engineering

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.

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 

分 类 号：TK223.23[动力工程及工程热物理—动力机械及工程]