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Two-fluid simulation of moving grate waste incinerator: Comparison of 2D and 3D bed models

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  • Xia, Zihong
  • Long, Jisheng
  • Yan, Shuai
  • Bai, Li
  • Du, Hailiang
  • Chen, Caixia

Abstract

CFD-based simulation models of large-scale moving grate combustor for biomass and municipal solid waste are not well established. Although a 3D transient two-fluid model provides dynamic coupling between the fuel bed and the freeboard, simulation of a whole incinerator is extremely computational intensive and difficult for industrial applications. In this paper, an efficient computational method is proposed where a 2D bed model is combined with a 3D steady furnace model. In the new approach, the bed model includes a transient two-fluid simulation using realistic grate geometry cut by the incinerator throat, which includes a dynamic coupling of heat and mass transfers between the fuel bed and the lower combustion chamber. The simulated bedtop profiles are then used as inlet conditions to run a 3D steady simulation of turbulent gas combustion for the whole furnace. The simulation results are validated with our previous 3D transient full-incinerator results (Xia et al., 2020) [1] and on-site measurement data. In addition, effects of particle size, waste throughput, and residence time on the bed incineration performance are investigated. Overall, the current computational method highly promotes the efficiency of modelling industrial moving grate combustors.

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  • 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).
    • Handle: RePEc:eee:energy:v:216:y:2021:i:c:s0360544220323641
    DOI: 10.1016/j.energy.2020.119257
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    References listed on IDEAS

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    1. Karim, Md Rezwanul & Bhuiyan, Arafat Ahmed & Sarhan, Abd Alhamid Rafea & Naser, Jamal, 2020. "CFD simulation of biomass thermal conversion under air/oxy-fuel conditions in a reciprocating grate boiler," Renewable Energy, Elsevier, vol. 146(C), pages 1416-1428.
    2. Barroso, Gabriel & Roth, Simon & Nussbaumer, Thomas, 2019. "Investigation of biomass conversion on a moving grate by pyrolysis gas analysis and fuel bed modelling," Energy, Elsevier, vol. 174(C), pages 897-910.
    3. Gu, Tianbao & Yin, Chungen & Ma, Wenchao & Chen, Guanyi, 2019. "Municipal solid waste incineration in a packed bed: A comprehensive modeling study with experimental validation," Applied Energy, Elsevier, vol. 247(C), pages 127-139.
    4. 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.
    5. Costa, M. & Massarotti, N. & Indrizzi, V. & Rajh, B. & Yin, C. & Samec, N., 2014. "Engineering bed models for solid fuel conversion process in grate-fired boilers," Energy, Elsevier, vol. 77(C), pages 244-253.
    6. 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.
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    1. Gu, Tianbao & Ma, Wenchao & Berning, Torsten & Guo, Zhenning & Andersson, Ronnie & Yin, Chungen, 2022. "Advanced simulation of a 750 t/d municipal solid waste grate boiler to better accommodate feedstock changes due to waste classification," Energy, Elsevier, vol. 254(PB).
    2. Yongqi Liang & Jian Tang & Heng Xia & Loai Aljerf & Bingyin Gao & Mulugeta Legesse Akele, 2023. "Three-Dimensional Numerical Modeling and Analysis for the Municipal Solid-Waste Incineration of the Grate Furnace for Particulate-Matter Generation," Sustainability, MDPI, vol. 15(16), pages 1-22, August.
    3. Su, Xianqiang & Fang, Qingyan & Ma, Lun & Yin, Chungen & Chen, Xinke & Zhang, Cheng & Tan, Peng & Chen, Gang, 2024. "Mathematical modeling of a 30 MW biomass-fired grate boiler: A reliable baseline model taking fuel-bed structure into account," Energy, Elsevier, vol. 288(C).
    4. Jing Zhao & Zirui Zhang & Bo Li & Xiaolin Wei, 2021. "Formation and Growth Behavior Analysis of Slagging Rings in Rotary Kiln-Type Hazardous Waste Incineration Systems," Energies, MDPI, vol. 14(22), pages 1-14, November.

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