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Solid Waste Incineration Modelling for Advanced Moving Grate Incinerators

Author

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  • Mingtao Jiang

    (Environmental Process Modelling Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
    Mingtao Jiang and Adrian C. H. Lai contributed equally to this work as first authors.)

  • Adrian C. H. Lai

    (Environmental Process Modelling Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
    Mingtao Jiang and Adrian C. H. Lai contributed equally to this work as first authors.)

  • Adrian Wing-Keung Law

    (Environmental Process Modelling Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
    School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore)

Abstract

Currently, the design of advanced moving grate (AMG) incinerators for solid waste is aided by computational simulations. The simulation approach couples a waste bed model to characterize the incineration processes of the waste material on top of the moving grate, with a computational fluid dynamics (CFD) model to reproduce the heated air movement and reactions in the incinerator space above. However, the simulation results of AMG incinerators are rarely compared with actual field measurements for validation in the literature so far. In this study, we first examine the sensitivity of pyrolysis kinetics in the waste bed model using three existing alternatives. The predictions of combustion characteristics, including the bed height, flow and temperature distributions, composition of stack gases and gas emissions are obtained for the three alternatives and compared with measurements from a simple laboratory furnace. The results show that the pyrolysis kinetics mechanism can significantly affect the outputs from the waste bed model for incineration modelling. Subsequently, we propose a new coupling approach based on a recent AMG waste bed model (which includes the complex pyrolysis kinetics inside the waste bed on top of the moving grate) and the freeboard CFD simulations. The new approach is then used to predict the field performance of a large scale waste-to-energy (WTE) plant and the predictions are compared directly with the real measurements in various operational scenarios. The comparison shows an overall satisfactory agreement in terms of temperature and exit gases composition given the complexity of the real life operations, although the CO emission is slightly underpredicted.

Suggested Citation

  • Mingtao Jiang & Adrian C. H. Lai & Adrian Wing-Keung Law, 2020. "Solid Waste Incineration Modelling for Advanced Moving Grate Incinerators," Sustainability, MDPI, vol. 12(19), pages 1-15, September.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:19:p:8007-:d:420707
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    References listed on IDEAS

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    1. Petra Schneider & Le Hung Anh & Jörg Wagner & Jan Reichenbach & Anja Hebner, 2017. "Solid Waste Management in Ho Chi Minh City, Vietnam: Moving towards a Circular Economy?," Sustainability, MDPI, vol. 9(2), pages 1-20, February.
    2. Yin, Chungen & Rosendahl, Lasse & Clausen, Sønnik & Hvid, Søren L., 2012. "Characterizing and modeling of an 88 MW grate-fired boiler burning wheat straw: Experience and lessons," Energy, Elsevier, vol. 41(1), pages 473-482.
    3. Jihyun Kim & Sukjae Jeong, 2017. "Economic and Environmental Cost Analysis of Incineration and Recovery Alternatives for Flammable Industrial Waste: The Case of South Korea," Sustainability, MDPI, vol. 9(9), pages 1-16, September.
    4. Charles H. K. Lam & Alvin W. M. Ip & John Patrick Barford & Gordon McKay, 2010. "Use of Incineration MSW Ash: A Review," Sustainability, MDPI, vol. 2(7), pages 1-26, July.
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    Cited by:

    1. González-Núñez, Sofía & Guerras, Lidia S. & Martín, Mariano, 2023. "A multiscale analysis approach for the valorization of sludge and MSW via co-incineration," Energy, Elsevier, vol. 263(PE).
    2. Tomasz Jaworski & Agata Wajda & Łukasz Kus, 2023. "Model of Residence Time Distribution, Degree of Mixing and Degree of Dispersion in the Biomass Transport Process on Various Grate Systems," Energies, MDPI, vol. 16(15), pages 1-22, July.
    3. Michał Kozioł & Joachim Kozioł, 2023. "Impact of Primary Air Separation in a Grate Furnace on the Resulting Combustion Products," Energies, MDPI, vol. 16(4), pages 1-16, February.
    4. João Silva & Senhorinha Teixeira & José Teixeira, 2023. "A Review of Biomass Thermal Analysis, Kinetics and Product Distribution for Combustion Modeling: From the Micro to Macro Perspective," Energies, MDPI, vol. 16(18), pages 1-23, September.

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