东方660MW超超临界锅炉防止结焦措施
焦伟营，胡燕宾
大唐信阳发电有限责任公司，河南 信阳 464000
Measures to Prevent Coking for Dong Fang 660MW Supercritical Boiler
Jiao Wei-ying，Hu Yan-bin
DaTang XinYang Electric Power Generation Co.,Ltd. XinYang 464000，Henan Province，PRC
ABSTRACT: : The off-focus coke caused the negative pressure fluctuations in # 3 and # 4 boilers in a power plant for many times, and seriously even caused the boilers fire. Seriously, the boilers were outfired due to the coke dropping. Coking brought the serious threat to the safety in productions of the power plant. After the cause of coking was found and the corresponding measurements are taken, the coking problem in the boilers was solved.
KEY WORD: coking combustor measurement ash fusion point
摘要：某厂二期#3、#4锅炉自投产以来出现过多次掉焦引起炉膛负压波动，严重时出现因掉焦引起锅炉灭火。结焦给该厂的安全生产带来严重威胁，查找结焦原因并采取了相应的措施后解决了锅炉结焦问题。
关键词：结焦 燃烧器 措施 灰熔点
1 机组概况
某厂锅炉为东方锅炉股份有限公司生产的DG2000／26.15-II2型一次中间再热、超超临界参数变压运行，带内置式启动旁路系统的本生直流锅炉。型式为单炉膛、尾部双烟道结构、采用烟气挡板调节再热汽温、固态排渣、全钢构架、全悬吊结构、平衡通风、露天布置、前后墙对冲燃烧方式。炉膛
下部为螺旋水冷壁，上部为垂直水冷壁。制粉系统采用冷一次风机正压直吹式制粉系统，配6台ZGM-113G型中速磨，燃烧器为东锅公司自行开发设计的外浓内淡型低NOx旋流燃烧器（仿HT-NR3型），布置于螺旋水冷壁前后墙各3层，每层布置6只。在煤粉燃烧器的上方前、后墙各布置1层6只燃烬风及2只侧燃尽风。
该厂设计煤种为河南平顶山煤矿的混合煤种见表一：
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IP卡
狗仔卡
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
显身卡