600MW超临界CFB锅炉炉内稀相区燃烧均匀性的实炉试验研究  

Field Tests on Combustion Uniformity of the Dilute Phase in a 600MW Supercritical CFB Boiler

作　　者：严谨[1] 卢啸风[1] 王泉海[1] 李建波[1] 李瑞欣 雷秀坚 陈晔[1] 刘昌旭 

机构地区：[1]低品位能源利用技术及系统教育部重点实验室(重庆大学),重庆市沙坪坝区400044 [2]神华国能集团有限公司,北京市西城区100033 [3]四川白马循环流化床示范电站有限责任公司,四川省内江市641005

出　　处：《中国电机工程学报》2018年第2期397-405,共9页Proceedings of the CSEE

基　　金：国家重大研发计划(2016YFB0600200)~~

摘　　要：在一台600MW超临界循环流化床锅炉上进行了炉内稀相区燃烧均匀性的实炉试验研究,测量了不同负荷下一、二次风优化后距布风板25和38m沿炉膛四周的烟气成分分布及炉膛出口的氧量分布。研究表明：给煤分布决定了烟气的主要分布趋势,二次风标高处的炉内烟气成分分布对炉膛出口烟气成分分布有重要影响。当距布风板25m处的炉膛前后墙烟气氧量标准差达到2.8%时,烟气向上流动到距布风板38m处后仍存在1.8%烟气氧量的标准差。在60%至75%的中低负荷时,距布风板25~38m区域内炉膛单位高度（1m）的耗氧量约为0.13%。通过补充试验与回归分析,得到了炉膛稀相区氧量扩散速率的计算关联式。Field tests were carried out on a 600MW supercritical circulating fluidized bed （CFB） boiler. The flue gas components at 25m and 38m above the air distributors and at the furnace outlets were obtained and analyzed after air optimization. Results imply that the distribution trend of coal gas is determined by the distribution of coal. The distribution of flue gas composition at the secondary air elevation has an important influence on that at the furnace outlets. When the standard deviation of oxygen concentration between the front wall and rear wall at 25m above the air distributors reaches 2.8%, this value would still be 1.8% when flue gas flowed upward to 38m above the air distributors. When the boiler run between 60% BMCR and 75% BMCR, the oxygen consumption per unit height （lm） is about 0.13% in the region from 25m to 38m above the air distributor. Through the supplementary test and the regression analysis, the correlation formula for the oxygen diffusion rate in the dilute phase of the furnace is obtained.

关 键 词：循环流化床(CFB)锅炉 二次风 烟气成分 燃烧份额 600MW 

分 类 号：TM0[电气工程—电工理论与新技术]