摘要
为了分析生物质循环流化床锅炉的燃烧机理,实现燃烧控制优化,通过生物质燃料特性分析以及即燃碳燃烧理论的应用,对炉内燃烧过程以及燃烧机理进行分析,同时建立燃烧过程机理模型,研究了炉内即燃碳动态变化过程,实现对负荷、炉膛温度、一氧化碳排放以及烟气含氧量的预测。结果表明:入炉燃料脱挥发分后形成的即燃碳的燃烧速度比挥发分慢,给料的波动会直接影响炉内即燃碳存量;作为给料波动时主要热量来源,即燃碳燃烧所需氧量更少,燃烧更充分,此时烟气中的CO体积分数较低、含氧量较高;炉膛温度、负荷、CO体积分数和烟气含氧量的预测值与实际值的变化趋势基本相同。
In order to analyze the internal combustion mechanism of the biomass circulating fluidized bed boiler and realize the optimization of combustion control,the combustion process and combustion mechanism in the furnace were analyzed through the analysis of the characteristics of biomass fuel and the application of the instantaneous carbon combustion theory,and the combustion process was established.The dynamic change process of carbon burning in the furnace was analyzed to realized the prediction of load,furnace temperature,carbon monoxide emission and flue gas oxygen content.Results show that the combustion rate of instant carbon formed after the fuel devolatilization is slower than that of volatile matter,and the fuel feeding fluctuation directly affects the instant carbon stock in the furnace.As the main source of heat when the feed fluctuates,the oxygen required for instant carbon combustion is less and the combustion is more sufficient.At the same time,the CO valume fraction in the flue gas is lower and the oxygen content is higher.the predicted values of furnace temperature,furnace load,CO valume fraction and flue gas oxygen content are basically the same as the actual values.
作者
张开萍
高明明
龙江
张洪福
王亚柯
岳光溪
ZHANG Kaiping;GAO Mingming;LONG Jiang;ZHANG Hongfu;WANG Yake;YUE Guangxi(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China;Huaneng Renewables Corporation Limited,Beijing 100036,China;Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China)
出处
《动力工程学报》
CAS
CSCD
北大核心
2023年第4期452-460,共9页
Journal of Chinese Society of Power Engineering
基金
华能集团总部科技项目基础能源科技研究专项资助项目(二)(HNKJ21-H31)
山西省揭榜招标资助项目(20191101013)
中国华电集团有限公司重大科技项目计划资助项目(CHDKJ19-01-88)。
关键词
生物质
循环流化床
即燃碳
机理建模
负荷预测
烟气含氧量
biomass
circulating fluidized bed
instant burning carbon
mechanism modeling
load prediction
flue gas oxygen content
