电力学报2024，Vol.39Issue(6)：541-550,10.DOI:10.13357/j.dlxb.2024.056
掺烧烟煤对W型火焰锅炉运行性能影响的试验研究
Experimental Study on the Influence of Cofiring Bituminous Coal on the Operational Performance of a W-flame Boiler
摘要
Abstract
To obtain the influence on boiler operating parameters after cofiring bituminous coal in W flame boil-ers,and to analyze the factors which restrict the maximum cofiring burning proportion or all burning of bitumi-nous coal,the W flame boiler of a 660 MW coal-fired unit is taken as the research object,the combustion test is carried out under max load,which the cofiring ratios of bituminous coal are 0％,16.7％,33.3％,50％and 66.7％.Results show that with the burning ratio increased,smoke temperature,the furnace outlet flue gas tem-perature,reheat decrease water are increased,fly ash carbon content,SCR inlet NOx concentration,the fur-nace temperature level are decreased,boiler efficiency is falled and then lifted,and oven coking is increased.When it reached the maximum cofiring ratio 66.7％,the exhaust temperature is increased by 9.6℃,the carbon content of fly ash is reduced by 0.93％,the boiler efficiency is reduced by 0.36％,the flue gas temperature of the economizer outlet is nearly 420℃,which reaches the upper limit temperature of SCR denitration catalyst,the temperature reducing water increased by about 17 t/h,and the NOx emission concentration(standard condi-tions,mass concentration)is reduced by about 135 mg/m3.The early ignition of bituminous coal led to the up-ward shift of the flame center of the furnace,which is the main reason for the change of the temperature distribu-tion of flue gas and the heat absorption in the heated surface after the W flame boiler is mixed with bituminous coal.If the W flame boiler needs to reach the capacity of fully burning bituminous coal,the main and auxiliary systems of the boiler should be reformed.关键词
W型火焰锅炉/掺烧烟煤/运行参数/试验研究Key words
W-flame boiler/mixed with bituminous coal/operating parameters/experimental study分类
信息技术与安全科学引用本文复制引用
杨希刚,陈辉,赖金平,黄林滨,王睿..掺烧烟煤对W型火焰锅炉运行性能影响的试验研究[J].电力学报,2024,39(6):541-550,10.基金项目
国家能源集团2023年科技专项(GJNY-23-81). （GJNY-23-81）
