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Research on the Arrangement Scheme of Spirally Twisted Tape Inserts in a Grate Furnace

Author

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  • Chen Yang

    (China Ship Scientific Research Center, Wuxi 214082, China)

  • Jingxian Kong

    (Institute of Process Equipment, College of Energy Engineering, Zhejiang University, Hangzhou 310027, China)

  • Xinji Chen

    (Institute of Process Equipment, College of Energy Engineering, Zhejiang University, Hangzhou 310027, China)

  • Zhijiang Jin

    (Institute of Process Equipment, College of Energy Engineering, Zhejiang University, Hangzhou 310027, China)

  • Jinyuan Qian

    (Institute of Process Equipment, College of Energy Engineering, Zhejiang University, Hangzhou 310027, China)

Abstract

To eliminate the flow dead zone and homogenize the asymmetric flow field of a grate furnace, spirally twisted tape inserts (STTIs) with a pitch ratio of 1.5 were installed in the vertical flues of an SCL1000-13.5/450 grate boiler. The arrangement schemes found to be present inside the chosen 1000 t/d grate furnace, determined using the orthogonal experimental method, included separate installation in chamber II, separate placement in chamber III, and simultaneous arrangement in both chamber II and chamber III. The effects of row spacing H , column spacing W , and mounting angle φ were investigated by means of the practicable and feasible numerical simulation method. With a focus on the uniformity degree of the flue gas, the results showed that temperature distribution is directly correlated with the velocity field. When it comes to the uniformity of the flow field, the exclusive use of STTIs in chamber II was better than that in chamber III. Under the optimal combination scheme of STTIs in both chamber II and chamber III (scheme N 3 23 ), the exhaust gas temperature reached the minimum value and the uniformity index of temperature increased to the range of 0.994~0.997. The findings in this work could provide a reference for the optimization of the flow field in a grate furnace.

Suggested Citation

  • Chen Yang & Jingxian Kong & Xinji Chen & Zhijiang Jin & Jinyuan Qian, 2024. "Research on the Arrangement Scheme of Spirally Twisted Tape Inserts in a Grate Furnace," Energies, MDPI, vol. 17(21), pages 1-23, October.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:21:p:5292-:d:1505920
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    References listed on IDEAS

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    1. Peiyuan Pan & Meiyan Zhang & Gang Xu & Heng Chen & Xiaona Song & Tong Liu, 2020. "Thermodynamic and Economic Analyses of a New Waste-to-Energy System Incorporated with a Biomass-Fired Power Plant," Energies, MDPI, vol. 13(17), pages 1-20, August.
    2. 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).
    3. Zadravec, Tomas & Yin, Chungen & Kokalj, Filip & Samec, Niko & Rajh, Boštjan, 2020. "The impacts of different profiles of the grate inlet conditions on freeboard CFD in a waste wood-fired grate boiler," Applied Energy, Elsevier, vol. 268(C).
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