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首页> 外文会议>Proceedings of the 11th International Conference on Fluidized Bed Technology >STUDY ON NUMERICAL SIMULATION OF COAL COMBUSTION IN THE FLUIDIZED BED FURNACE UNDER O2/CO2 ATMOSPHERES
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STUDY ON NUMERICAL SIMULATION OF COAL COMBUSTION IN THE FLUIDIZED BED FURNACE UNDER O2/CO2 ATMOSPHERES

机译：O2 / CO2气氛下流化床炉内煤燃烧的数值模拟研究

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摘要

Oxy-fuel fluidized bed combustion technology is considered to be one of the most promising technologies to reduce the CO2 emissions from power plants.In this paper, regarding a 6 kWth bubbling fluidized bed, numerical simulation method for coal combustion process in fluidized bed under O2/CO2 atmospheres was discussed, and char combustion models were modified by adding calculation model of char gasification reactions.Simulations results of flow field, temperature field, species concentrations, combustion characteristics in fluidized bed and the influence of gasification reactions were analyzed.The accuracy of numerical simulation results were validated by comparing with experimental data.The results reveal that the flow and combustion in the furnace were in good condition, conforming to typical rules of bubbling fluidized bed.The process of char consumption was significantly influenced by char gasification reactions.The prediction error of the CO concentration at outlet was reduced by 30％ under the O2/CO2 atmosphere when adding the char gasification reactions into the model.The experimental results agreed with simulations well, proving that the coal combustion calculating model was reliable.
机译：氧燃料流化床燃烧技术被认为是减少发电厂CO 2排放的最有前途的技术之一。本文针对6 kWth的鼓泡流化床，在O 2条件下流化床中煤燃烧过程的数值模拟方法讨论了/ CO2气氛，并通过添加焦炭气化反应的计算模型来修改焦炭燃烧模型，分析了流场，温度场，物质浓度，流化床燃烧特性以及气化反应的影响的模拟结果。通过与实验数据的比较验证了数值模拟结果，结果表明炉内的流动和燃烧状况良好，符合鼓泡流化床的典型规则，焦炭气化反应对焦炭消耗过程有显着影响。出口处CO浓度的预测误差减少了在模型中加入焦炭气化反应时，在O2 / CO2气氛下的燃烧率为30％。实验结果与模拟结果吻合良好，证明了燃煤计算模型的可靠性。

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  • 会议地点 Beijing(CN)
  • 作者

    Lei Zhong; Lingling Zhao; Bo Fang; Qing Jia; Changsui Zhao;

  • 作者单位

    Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education,School of Energy and Environment,Southeast University,Nanjing,210096,China;

    Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education,School of Energy and Environment,Southeast University,Nanjing,210096,China;

    Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education,School of Energy and Environment,Southeast University,Nanjing,210096,China;

    Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education,School of Energy and Environment,Southeast University,Nanjing,210096,China;

    Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education,School of Energy and Environment,Southeast University,Nanjing,210096,China;

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  • 正文语种 eng
  • 中图分类 化工通用机械与设备;
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