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Sodium transformation simulation with a 2-D CFD model during circulating fluidized bed combustion

机译：循环流化床燃烧过程中具有2-D CFD模型的钠转化模拟

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摘要

Investigation of the release behaviors of alkali and alkaline earth metals is necessary to understand the mechanisms of ash-related problems such as fouling, slagging, and corrosion when burning fuel with high alkali contents. Using a 2-D circulating fluidized bed (CFB) combustion model combined with a sodium migration model, sodium transformation was predicted in a 30 kW CFB combustor. Simulation results from the 2-D model are in agreement with those from the 3-D model and experiments. Calculations and analysis of sodium transformation with different parameters, including furnace temperature, excess air, and secondary air ratio, were performed. The results show that a higher furnace temperature leads to a higher number of deposited sodium and ash particles on the probe surface. Increasing the amount of excess air or decreasing the secondary air ratio may reduce the amounts of deposited sodium and ash particles.
机译：需要调查碱和碱土金属的释放行为，是理解灰烬相关问题的机制，如燃烧燃料，燃烧有高碱含量时的污垢，粘接和腐蚀。使用2-D循环流化床（CFB）燃烧模型与钠迁移模型结合，在30kW CFB燃烧器中预测了钠转化。二维型号的仿真结果与3-D模型和实验一致。进行了不同参数的计算和分析，包括炉温，过量空气和二次空气比例。结果表明，较高的炉温导致探针表面上较多的沉积钠和灰分颗粒。增加过量空气量或减少二次空气比率可以减少沉积的钠和灰分颗粒的量。

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  • 来源
    《Fuel》 |2020年第may1期|117175.1-117175.7|共7页
  • 作者

    Ji Jieqiang; Cheng Leming; Nie Li; Li Liyao; Wei Yangjun;

  • 作者单位

    Zhejiang Univ Inst Thermal Power Engn State Key Lab Clean Energy Utilizat Hangzhou 310027 Peoples R China;

    Zhejiang Univ Inst Thermal Power Engn State Key Lab Clean Energy Utilizat Hangzhou 310027 Peoples R China;

    Zhejiang Univ Inst Thermal Power Engn State Key Lab Clean Energy Utilizat Hangzhou 310027 Peoples R China|Dongfang Boiler Grp Co Ltd Zigong 643001 Peoples R China;

    Zhejiang Univ Inst Thermal Power Engn State Key Lab Clean Energy Utilizat Hangzhou 310027 Peoples R China;

    Zhejiang Univ Inst Thermal Power Engn State Key Lab Clean Energy Utilizat Hangzhou 310027 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Sodium transformation; Circulating fluidized bed; Numerical simulation;

    机译：钠转化;循环流化床;数值模拟;

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