电力科技与环保2024，Vol.40Issue(1)：60-67,8.DOI:10.19944/j.eplep.1674-8069.2024.01.008
不同负荷工况下660MW循环流化床锅炉脱硝特性研究
Study on denitration characteristic of 660 MW circulating fluidized bed boiler under different load condition
摘要
Abstract
In order to reveal the operating characteristics of circulating fluidized bed under different loads,a 660 MW cir-culating fluidized bed boiler was taken as the research object.Under full load and 75%load,the effects of bed tempera-ture fluctuation,air volume ratio,flue gas oxygen content and air-coal ratio on ammonia injection and denitrification effect of selective non-catalytic reduction technology were studied.The results showed that during full load operation,the am-monia injection projected by SNCR maintained the same trend as the coal feed of the circulating fluidized bed boiler in the oxygen deficient zone.If the ammonia injection is continuously increased,it would lead to significant ammonia es-cape and reduce the SNCR denitrification capacity.If the coal feeding amount remained stable in the furnace,increasing the secondary air volume(oxygen content)in the oxygen deficient reduction zone appropriately would promote the reduc-tion reaction of volatile nitrogen.During 75%running load,to meet the denitrification requirements,when the bed temper-ature fluctuation exceeds 110℃,it was necessary to increase the primary air volume,reduce the secondary air volume and spray ammonia appropriately.When the bed temperature fluctuation was below 50℃,the primary air volume and am-monia injection amount should be decreased appropriately.If the fluctuation range of bed temperature was higher than 50℃and lower than 100℃,the secondary air volume and ammonia injection amount should be reduced appropriately.In the oxygen deficient zone,the ammonia injection amount was increased when the total coal amount was increases.The research results can guide the optimal operation of circulating fluidized bed to reduce nitrogen oxide emissions.关键词
循环流化床/脱硝/床温/风量配比/烟气含氧量/风煤配比Key words
circulating fluidized bed/denitrification/bed temperature/air amount/flue gas oxygen content/total coal amount分类
能源科技引用本文复制引用
张文祥,徐文韬,黄亚继,金保昇..不同负荷工况下660MW循环流化床锅炉脱硝特性研究[J].电力科技与环保,2024,40(1):60-67,8.基金项目
江苏省科技成果转化专项资金(BA2020001) （BA2020001）
