某600 MW超超临界对冲锅炉二次风配风方式对燃烧及排放特性影响的数值模拟  

Numerical Simulation on Influence of Secondary Air Distribution on Coal Combustion Characteristic and NO_x Emission in 1000 MW ULTRA-Supercritical Opposed Firing Boiler

作　　者：李怀强[1] 袁宏伟[1] 马仑[2,3] 刘森 张成 谭鹏[2] 方庆艳[2] 夏季[3] LI Huaiqiang;YUAN Hongwei;MA Lun;LIU Sen;ZHANG Cheng;TAN Peng;FANG Qingyan;XIA Ji(Guangdong Red Bay Power Generation Co.,Ltd.,Shanwei Guangdong 516623,China;State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology,Wuhan Hubei 430074,China;Wuhan Huazhong Sineng Technology Co.,Ltd.,Wuhan Hubei 430074,China)

机构地区：[1]广东红海湾发电有限公司,广东汕尾516623 [2]华中科技大学煤燃烧国家重点实验室,湖北武汉430074 [3]武汉华中思能科技有限公司,湖北武汉430074

出　　处：《湖北电力》2020年第5期83-87,共5页Hubei Electric Power

基　　金：中国博士后科学基金(项目编号:2019M652639);武汉市企业技术创新项目(项目编号:2020020602012150)。

摘　　要：对某600 MW对冲锅炉不同二次风配风方式下炉内燃烧及排放特性开展了数值模拟研究。实验结果表明:不同配风方式下炉内温度分布差异性较小;收腰配风方式下炉膛出口氧量最高,正宝塔配风方式较高,倒宝塔配风方式次之,均等配风方式下最低;虽然不同二次风配风方式下出口CO存在轻微差异,但都处于较低水平;均等配风方式下煤粉燃尽程度最高(99.22%),倒宝塔配风方式较高,正宝塔配风方式次之,收腰配风方式下最低;均等配风方式下NOx排放量最高,正宝塔配风方式较高,缩腰配风方式次之,倒宝塔配风方式最低(146 ppm)。This paper numerically simulates the combustion and emission characteristics of a 600 MW opposed firing boiler under different secondary air distribution modes.The simulation results are shown as follows:The difference of temperature distribution in the furnace is relatively small under different air distribution modes.The oxygen at the outlet of furnace is the highest under the"shrunk-middle"air distribution mode,relatively higher under the"upright pagoda"mode,followed by"inverted pagoda"and the equal air distribution mode.Although the CO emissions are slightly different under different secondary air distribution modes,they are all at a low level.The highest burning-out degree of pulverized coal(99.22%)is achieved under the equal air distribution mode,followed by the"inverted pagoda"air distribution mode,the"upright pagoda"and the"shrunk-middle"mode.NOx emission is the highest under the equal air distribution mode,which is followed by the"upright pagoda"mode,the"shrunkmiddle"and the"inverted pagoda"mode(146 ppm).

关 键 词：对冲燃烧锅炉 二次风配风 燃烧特性 NOX排放特性 数值模拟 

分 类 号：TM621.2[电气工程—电力系统及自动化]