330MW CFB锅炉中心筒改造研究与应用  

Research and Application on the Retrofitting of Central Cylinder of 330MW CFB Boiler

作　　者：李楠[1] 周小根 施起荣 施斌 李昱喆[1] 赵鹏勃[1] 钟毅 高洪培[1] 孙献斌[1] LI Nan ZHOU Xiaogen SHI Qirong SHI Bin LI Yuzhe ZHAO Pengbol ZHONG Yi GAO Hongpei SUN Xianbin(Huaneng Clean Energy Research Institute Co. Ltd., Beijing 102209, China FENYI Power Plant, SPIC JIANGXI Electric Power Co. Ltd., Fenyi 336607, China)

机构地区：[1]中国华能集团清洁能源技术研究院有限公司,北京102209 [2]国家电投集团江西电力有限公司分宜发电厂,江西分宜336607

出　　处：《工业加热》2017年第3期58-60,共3页Industrial Heating

摘　　要：某循环流化床(CFB)锅炉的问题主要表现在:中心筒变形严重;旋风分离器效率低,飞灰含碳量大;炉内温度场分布不合理。电厂2016年对中心筒实施了改造,主要措施有:提升中心筒材质等级;用自由悬挂安装方式替代挂钩式安装;末节中心筒采用渐缩型结构,并设置偏心;采用迷宫式密封结构。改造后结果表明:床温降低30℃,稀相区差压提高500 Pa,氮氧化物减排50%。研究成果可在同类型CFB锅炉上推广。A circulating fluidized bed （CFB） boiler had the following problems： Boiler had inefficient cyclone separators and high carbon content in fly ash; central cylinders were deformed seriously; distribution of temperature in the furnace was unreasonable. Power plant retrofitted the central cylinders in 2016, the main measures included： improved the material level of the central cylinders; free hanging installation replaced the hook installation; last sections of the central cylinders with eccentric were tapered structure; central cylinders had labyrinthine sealing structure. The result indicates that： the bed temperature is reduced by 30℃ ;dilute phase pressure dfference increases 500 Pa; nitrogen oxide emission decreases by 50%. The method can be popularized on the same type of CFB boiler.

关 键 词：循环流化床锅炉 中心筒 自由悬挂 床温 稀相区 

分 类 号：TK229.66[动力工程及工程热物理—动力机械及工程]