高温型CFB锅炉关键技术与设计方案研究  

Research on key technologies and design plan of high-temperature CFB boiler

作　　者：孙献斌[1] 林伟荣[1] 韩应[1] 刘海峰[1] 赵鹏勃[1] 金森旺[1] 时正海[1] 王海涛[1] SUN Xianbin;LIN Weirong;HAN Ying;LIU Haifeng;ZHAO Pengbo;JIN Senwang;SHI Zhenghai;WANG Haitao(Clean Energy Research Institute Co.,Ltd.,China Huaneng Group Co.,Ltd.,Beijing 102209,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

出　　处：《热力发电》2020年第5期1-6,共6页Thermal Power Generation

基　　金：国家“十二五”科技支撑计划课题资助(2012BAA02B02)。

摘　　要：为提高燃用难燃煤种的循环流化床(CFB)锅炉的燃烧效率,提出了高温型CFB锅炉的技术概念,建立了高温型CFB试验研究平台,在该CFB试验台上研究了难燃煤种的高温燃烧及污染物排放特性。试验结果表明,炉内燃烧温度提高可较明显地降低难燃煤种的飞灰可燃物质量分数,提高燃烧效率;但随着运行床温的升高,脱硫效率下降,NOx排放值有所增加。在试验研究的基础上,对高温型超超临界660 MW CFB锅炉技术方案进行了设计研究,并对锅炉方案中的6个旋风分离器的灰颗粒流量分配特性进行了数值模拟,确定了旋风分离器的优化布置方式,为后续的高温型超超临界660 MW CFB锅炉结构设计及工程应用奠定了技术基础。In order to improve the combustion efficiency of circulating fluidized bed(CFB)boiler firing hard-toburn coal,the technical concept of high-temperature CFB boiler was put forward,and a high-temperature CFB experimental research platform was established.Moreover,high-temperature combustion and pollutant emission characteristics were researched in the CFB test facility for hard-to-burn coal.The experimental research result shows that,increasing the combustion temperature can obviously reduce combustible matter mass fraction in fly ash and increase the combustion efficiency for hard-to-burn coal.However,as the operating bed temperature increases,the desulfurization efficiency decreases and the NOx emission increases.Based on experimental research result,technical plan of ultra-supercritical 660 MW high-temperature CFB boiler was designed and researched,and the distribution characteristics of ash particle flow of six cyclone separators in the boiler scheme was simulated numerically.Finally,the optimum layout of cyclone separators was determined,which laid a technical foundation for the subsequent structural design and engineering application of ultra-supercritical 660 MW high-temperature CFB boiler.

关 键 词：高温型 CFB锅炉 燃烧特性 污染物排放 超超临界参数 旋风分离器 灰颗粒流量 分配特性 

分 类 号：TK222[动力工程及工程热物理—动力机械及工程] TK223