生物质振动炉排炉燃烧过程建模及动态特性分析  

Modeling and Dynamic Characteristic Analysis of Combustion Process of Biomass Vibrating Grate Furnace

作　　者：蒋海威 高明明 李杰 于浩洋 岳光溪[2] 黄中[2] JIANG Haiwei;GAO Mingming;LI Jie;YU Haoyang;YUE Guangxi;HUANG Zhong(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(North China Electric Power University),Changping District,Beijng 102206,China;Department of Energy and Power Engineering,Tsinghua University,Haidian District,Beijing 100084,China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京市昌平区102206 [2]清华大学能源与动力工程系,北京市海淀区100084

出　　处：《发电技术》2024年第2期250-259,共10页Power Generation Technology

基　　金：国家自然科学基金项目(62276096)。

摘　　要：为探究生物质振动炉排炉的炉内燃烧特性,实现机组燃烧过程的控制优化,通过对生物质燃料特性以及燃烧机理的分析,建立炉排炉燃烧过程的机理模型,研究炉排燃料量的动态变化,并预测炉膛温度、烟气含氧量等关键参数,探讨炉排的周期性振动对炉内燃烧状态的影响。结果表明:炉排燃料量与当前给料速度、燃料燃烧速度相关,且燃料在炉排上有较大的存储量,导致燃料着火燃烧与当前给料存在较大的迟延;炉膛温度与烟气含氧量的预测值能较好地跟随实测值的变化,其变化情况与燃烧特性一致;炉排的周期性振动会引起炉内燃烧状态的周期性变化,当炉排振动时,燃料燃烧速度、炉膛温度、炉膛压力都会随之升高,而烟气含氧量则有所降低,随着炉排的停振,这些参数又恢复到稳态水平。In order to explore the combustion characteristics of the biomass vibrating grate furnace and realize the control and optimization of the unit combustion process,the mechanism model of the grate combustion process was established through the analysis of the biomass fuel characteristics and combustion mechanism.Moreover,the dynamic change of the grate fuel amount was studied,and the key parameters such as furnace temperature and flue gas oxygen content were predicted.The influence of periodic vibration of grate on combustion state in furnace was discussed.The results show that the amount of fuel in the grate is related to the current feed rate and fuel burning rate.The fuel has a large storage capacity on the grate,which leads to a large delay between the fuel burning and the current feeding.The predicted values of furnace temperature and flue gas oxygen content can follow the measured values well,and their changes are in accord with the combustion characteristics.The periodic vibration of the grate will cause the periodic change of the combustion state in the furnace.When the grate vibrates,the fuel combustion speed,furnace temperature,furnace pressure will increase,and the oxygen content of the flue gas will be reduced.As the vibration of the grate stops,these parameters return to the steady state level.

关 键 词：火力发电 生物质直燃发电 炉排炉 燃烧特性 动态特性 

分 类 号：TK22[动力工程及工程热物理—动力机械及工程]