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Assessment of primary air on corn straw in a fixed bed combustion using Eulerian-Eulerian approach

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  • Meng, Xiaoxiao
  • Sun, Rui
  • Ismail, Tamer M.
  • El-Salam, M. Abd
  • Zhou, Wei
  • Zhang, Ruihan
  • Ren, Xiaohan

Abstract

In this paper, mathematical modelling is conducted on the combustion of corn straw in a one-dimensional bench combustion test rig, and the effects of the primary air flow rate are assessed over a wide range. Due to complex solid combustion mechanisms and inadequate knowledge of the process, the development of such combustion system is limited. Numerical modelling of this combustion system has some advantages over experimental analysis, although the development of a complete model for this type of combustion system remains a challenge. Due to its characteristic properties, modelling of biomass combustion has to overcome many difficulties. One such problem is displaying the process of initiating the combustion in numerical modelling. This study finds that the volatile release and combustion of char increases, thus increasing the amount of primary air up to a critical point, where the starting time of ignition becomes shorter as the primary air flow rate increases. The peak concentration of NO decreases with the increase of primary air, whereas with the increase in the amount of air, there is a reduction in the release of SO2 as well as a reduction in CO emissions in the bed.

Suggested Citation

  • Meng, Xiaoxiao & Sun, Rui & Ismail, Tamer M. & El-Salam, M. Abd & Zhou, Wei & Zhang, Ruihan & Ren, Xiaohan, 2018. "Assessment of primary air on corn straw in a fixed bed combustion using Eulerian-Eulerian approach," Energy, Elsevier, vol. 151(C), pages 501-519.
    • Handle: RePEc:eee:energy:v:151:y:2018:i:c:p:501-519
    DOI: 10.1016/j.energy.2018.03.081
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    Cited by:

    1. Meng, Xiaoxiao & Zhou, Wei & Yan, Yonghong & Ren, Xiaohan & Ismail, Tamer M. & Sun, Rui, 2020. "Effects of preheating primary air and fuel size on the combustion characteristics of blended pinewood and corn straw in a fixed bed," Energy, Elsevier, vol. 210(C).
    2. Zhou, Anqi & Xu, Hongpeng & Xu, Mingchen & Yu, Wenbin & Li, Zhenwei & Yang, Wenming, 2020. "Numerical investigation of biomass co-combustion with methane for NOx reduction," Energy, Elsevier, vol. 194(C).
    3. Meng, Xiaoxiao & Sun, Rui & Ismail, Tamer M. & Zhou, Wei & Ren, Xiaohan & Zhang, Ruihan, 2018. "Parametric studies on corn straw combustion characteristics in a fixed bed: Ash and moisture content," Energy, Elsevier, vol. 158(C), pages 192-203.
    4. Jiao, Long & Kuang, Min & Chen, Yangyang & Liu, Sheng & Wang, Xiu, 2021. "Detailed measurements of in-furnace gas temperature and species concentration distribution regarding the primary-air distribution mode in a spreader and reversal chain-grate furnace," Energy, Elsevier, vol. 235(C).
    5. Costa, Michela & Curcio, Christian & Piazzullo, Daniele & Rocco, Vittorio & Tuccillo, Raffaele, 2018. "RDF incineration modelling trough thermo-chemical conversion and gaseous combustion coupling," Energy, Elsevier, vol. 161(C), pages 974-987.
    6. Xia, Zihong & Long, Jisheng & Yan, Shuai & Bai, Li & Du, Hailiang & Chen, Caixia, 2021. "Two-fluid simulation of moving grate waste incinerator: Comparison of 2D and 3D bed models," Energy, Elsevier, vol. 216(C).
    7. Turkyilmazoglu, Mustafa, 2020. "Combustion of a solid fuel material at motion," Energy, Elsevier, vol. 203(C).

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