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过程工程学报 ›› 2017, Vol. 17 ›› Issue (4): 725-731.DOI: 10.12034/j.issn.1009-606X.216340

• 反应与分离 • 上一篇    下一篇

O2/CO2气氛下单颗粒焦炭燃烧竞争效应的数值模拟

曲 践12  李保卫1  龚志军12  武文斐12*     

  1. 1. 内蒙古自治区白云鄂博矿多金属资源综合利用国家重点实验室,内蒙古 包头 014010; 2. 内蒙古科技大学能源与环境学院,内蒙古 包头 014010
  • 收稿日期:2016-10-26 修回日期:2017-01-03 出版日期:2017-08-20 发布日期:2017-08-16
  • 通讯作者: 武文斐 wwf@imust.cn
  • 基金资助:
    内蒙古应用技术研发与开发基金资助项目;内蒙古高校创新团队研究计划资助项目

Numerical Simulation of the Competition Effect of Single Particle Coke Combustion in O2/CO2 Atmosphere

Jian QU1,2,  Baowei LI1,  Zhijun GONG1,2,  Wenfei WU1,2*   

  1. 1. Key Laboratory of Integrated Exploitation of Bayan Obo Multi-metal Resources, Baotou, Inner Mongolia 014010, China;
    2. School of Environment & Energy, Inner Mongolia University of Science & Technology, Baotou, Inner Mongolia 014010, China
  • Received:2016-10-26 Revised:2017-01-03 Online:2017-08-20 Published:2017-08-16
  • Contact: WU Wen-fei wwf@imust.cn

摘要: 基于O2/CO2气氛下焦炭燃烧的复杂气固反应,提出多种碳基随机孔模型(Various Char-RPM)模拟焦炭颗粒燃烧过程,对影响其竞争效应的因素进行分析. 结果表明,焦炭燃烧竞争效应主要发生在动力扩散控制区,此时颗粒孔隙中的气体浓度明显波动,燃烧不稳定. 提高环境中O2浓度和减小焦炭颗粒粒径均可弱化和消除竞争效应,减小粒径的效果更明显.

关键词: 单颗粒焦炭, 多孔介质, 传质, 随机孔模型, 竞争效应

Abstract: Based on the complex gas solid reaction of coke combustion in O2/CO2 atmosphere, the various char random pore model (Various Char-RPM) was proposed to simulate char particle combustion process. The influencing factors of competition effect in the char particle combustion process were analysed. The results showed that the competition effect of coke combustion was mainly in the dynamic diffusion control area. The gas concentration in the pores of the particles was obviously fluctuating, and the combustion was extremely unstable. Increasing of the concentration of O2 of the environment and decreasing of the particle size of the coke can weaken or eliminate the competition effect, the latter more obvious.

Key words: Single particle coke, porous media, mass transfer, random pore model, competitive effect