IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v238y2022ipcs0360544221022313.html
   My bibliography  Save this article

Effects of the gas/particle flow and combustion characteristics on water-wall temperature and energy conversion in a supercritical down-fired boiler at different secondary-air distributions

Author

Listed:
  • Li, Xiaoguang
  • Zeng, Lingyan
  • Zhang, Ning
  • Zhang, Xin
  • Song, Minhang
  • Chen, Zhichao
  • Li, Zhengqi

Abstract

To alleviate the over-temperature of water-wall and increase the energy conversion efficiency of supercritical down-fired boilers, cold-model air/particle flow experiments and in-situ trials were performed to investigate the effects of the secondary-air distribution wall-side deflection coefficient (ws) on air/particle flow and combustion characteristics. As ws increased from 0 to 0.33, the amount of air/particle flow diffused toward water-wall and the corresponding particle concentration both decreased, while the velocity decay was accelerated. At a ws of 0.16, due to prior ignition of fuel-rich flow and a longer flame stroke in lower furnace, the carbon in fly ash and slag were lowest. As ws increased, the thermal load was gradually focused at the furnace center, and the maximum value and deviation of water-wall temperature in lower furnace decreased. Consequently, the temperatures of superheated and reheated steam respectively increased from 542.7 °C to 543.9 °C–560.2 °C and 560.1 °C, respectively. Furthermore, increasing ws from 0 to 0.28 decreased the specific coal consumption from 346.29 to 341.09 g (kW h)−1, indicating the energy conversion efficiency was improved. However, adjusting ws had only a minimal effect on NOx emissions. A ws of 0.28 is recommended to optimize the water-wall temperature, pulverized-coal burnout, and economic performance.

Suggested Citation

  • Li, Xiaoguang & Zeng, Lingyan & Zhang, Ning & Zhang, Xin & Song, Minhang & Chen, Zhichao & Li, Zhengqi, 2022. "Effects of the gas/particle flow and combustion characteristics on water-wall temperature and energy conversion in a supercritical down-fired boiler at different secondary-air distributions," Energy, Elsevier, vol. 238(PC).
  • Handle: RePEc:eee:energy:v:238:y:2022:i:pc:s0360544221022313
    DOI: 10.1016/j.energy.2021.121983
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544221022313
    Download Restriction: Full text for ScienceDirect subscribers only

    File URL: https://libkey.io/10.1016/j.energy.2021.121983?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Wang, Qingxiang & Chen, Zhichao & Han, Hui & Tu, Yaojie & Liu, Guangkui & Zeng, Lingyan & Li, Zhengqi, 2019. "Detailed gas/particle flow characteristics of an improved down-fired boiler with respect to a critical factor affecting coal burnout: Vent-air inclination angle," Energy, Elsevier, vol. 182(C), pages 570-584.
    2. Lin, Xiaolong & Li, Qinlun & Wang, Lukai & Guo, Yifan & Liu, Yinhe, 2020. "Thermo-economic analysis of typical thermal systems and corresponding novel system for a 1000 MW single reheat ultra-supercritical thermal power plant," Energy, Elsevier, vol. 201(C).
    3. Zhang, Zhongxiao & Zhou, Rongcan & Ge, Xueli & Zhang, Jian & Wu, Xiaojiang, 2020. "Perspectives for 700 °C ultra-supercritical power generation: Thermal safety of high-temperature heating surfaces," Energy, Elsevier, vol. 190(C).
    4. Zhao, Yongliang & Wang, Chaoyang & Liu, Ming & Chong, Daotong & Yan, Junjie, 2018. "Improving operational flexibility by regulating extraction steam of high-pressure heaters on a 660 MW supercritical coal-fired power plant: A dynamic simulation," Applied Energy, Elsevier, vol. 212(C), pages 1295-1309.
    5. Wu, Haiqian & Kuang, Min & Wang, Jialin & Zhao, Xiaojuan & Yang, Guohua & Ti, Shuguang & Ding, Jieyi, 2020. "Lower-arch location effect on the flow field, coal combustion, and NOx formation characteristics in a cascade-arch, down-fired furnace," Applied Energy, Elsevier, vol. 268(C).
    6. Zeng, Lingyan & Song, Minhang & Li, Xiaoguang & Liu, Yibo & Li, Zhengqi & Chen, Zhichao, 2017. "Factors affecting the downward flame depth in a 600 MW down-fired boiler incorporating multiple-injection and multiple-staging technology," Energy, Elsevier, vol. 118(C), pages 333-344.
    7. Wang, Jialin & Kuang, Min & Zhao, Xiaojuan & Wu, Haiqian & Ti, Shuguang & Chen, Chuyang & Jiao, Long, 2020. "Trends of the low-NOx and high-burnout combustion characteristics in a cascade-arch, W-shaped flame furnace regarding with the staged-air angle," Energy, Elsevier, vol. 212(C).
    8. Wang, Qingxiang & Chen, Zhichao & Han, Hui & Zeng, Lingyan & Li, Zhengqi, 2019. "Experimental characterization of anthracite combustion and NOx emission for a 300-MWe down-fired boiler with a novel combustion system: Influence of primary and vent air distributions," Applied Energy, Elsevier, vol. 238(C), pages 1551-1562.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Yuan, Zhenhua & Chen, Zhichao & Bian, Liguo & Li, Zhengqi, 2023. "Influence of over-fired air location on gas-particle flow characteristics within a coal-fired industrial boiler under radial air staging," Energy, Elsevier, vol. 283(C).
    2. Xin Guo & Liangwei Xia & Guangbo Zhao & Guohua Wei & Yongjie Wang & Yaning Yin & Jianming Guo & Xiaohan Ren, 2022. "Steam Temperature Characteristics in Boiler Water Wall Tubes Based on Furnace CFD and Hydrodynamic Coupling Model," Energies, MDPI, vol. 15(13), pages 1-28, June.
    3. Essossinam Beguedou & Satyanarayana Narra & Komi Agboka & Damgou Mani Kongnine & Ekua Afrakoma Armoo, 2023. "Alternative Fuel Substitution Improvements in Low NO x In-Line Calciners," Clean Technol., MDPI, vol. 5(2), pages 1-31, June.
    4. Zeng, Guang & Zhou, Anqi & Fu, Jinming & Ji, Yang, 2022. "Experimental and numerical investigations on NOx formation and reduction mechanisms of pulverized-coal stereo-staged combustion," Energy, Elsevier, vol. 261(PB).

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Yin, Linfei & Xie, Jiaxing, 2022. "Multi-feature-scale fusion temporal convolution networks for metal temperature forecasting of ultra-supercritical coal-fired power plant reheater tubes," Energy, Elsevier, vol. 238(PA).
    2. Wang, Qingxiang & Chen, Zhichao & Li, Liankai & Zeng, Lingyan & Li, Zhengqi, 2020. "Achievement in ultra-low-load combustion stability for an anthracite- and down-fired boiler after applying novel swirl burners: From laboratory experiments to industrial applications," Energy, Elsevier, vol. 192(C).
    3. Wang, Anming & Liu, Jiping & Liu, Ming & Li, Gen & Yan, Junjie, 2019. "Dynamic modeling and behavior of parabolic trough concentrated solar power system under cloudy conditions," Energy, Elsevier, vol. 177(C), pages 106-120.
    4. Mauger, Gedeon & Tauveron, Nicolas & Bentivoglio, Fabrice & Ruby, Alain, 2019. "On the dynamic modeling of Brayton cycle power conversion systems with the CATHARE-3 code," Energy, Elsevier, vol. 168(C), pages 1002-1016.
    5. Igor Donskoy, 2023. "Techno-Economic Efficiency Estimation of Promising Integrated Oxyfuel Gasification Combined-Cycle Power Plants with Carbon Capture," Clean Technol., MDPI, vol. 5(1), pages 1-18, February.
    6. Wu, Chunying & Sun, Lingfang & Piao, Heng & Yao, Lijia, 2024. "Adaptive fuzzy finite time integral sliding mode control of the coordinated system for 350 MW supercritical once-through boiler unit to enhance flexibility," Energy, Elsevier, vol. 302(C).
    7. Zhao, Yongliang & Song, Jian & Liu, Ming & Zhao, Yao & Olympios, Andreas V. & Sapin, Paul & Yan, Junjie & Markides, Christos N., 2022. "Thermo-economic assessments of pumped-thermal electricity storage systems employing sensible heat storage materials," Renewable Energy, Elsevier, vol. 186(C), pages 431-456.
    8. Wu, Haiqian & Kuang, Min & Wang, Jialin & Zhao, Xiaojuan & Yang, Guohua & Ti, Shuguang & Ding, Jieyi, 2020. "Lower-arch location effect on the flow field, coal combustion, and NOx formation characteristics in a cascade-arch, down-fired furnace," Applied Energy, Elsevier, vol. 268(C).
    9. Wang, Qingxiang & Chen, Zhichao & Han, Hui & Zeng, Lingyan & Li, Zhengqi, 2019. "Experimental characterization of anthracite combustion and NOx emission for a 300-MWe down-fired boiler with a novel combustion system: Influence of primary and vent air distributions," Applied Energy, Elsevier, vol. 238(C), pages 1551-1562.
    10. Garcet, J. & De Meulenaere, R. & Blondeau, J., 2022. "Enabling flexible CHP operation for grid support by exploiting the DHN thermal inertia," Applied Energy, Elsevier, vol. 316(C).
    11. Wang, Di & Zhou, Yu & Si, Long & Sun, Lingfang & Zhou, Yunlong, 2024. "Performance study of 660 MW coal-fired power plant coupled transcritical carbon dioxide energy storage cycle: Sensitivity and dynamic characteristic analysis," Energy, Elsevier, vol. 293(C).
    12. Haijiao Wei & Yuanwei Lu & Yanchun Yang & Yuting Wu & Kaifeng Zheng & Liang Li, 2024. "Research on Thermal Adaptability of Flexible Operation in Different Types of Coal-Fired Power Units," Energies, MDPI, vol. 17(9), pages 1-19, May.
    13. Chen, Chen & Liu, Ming & Li, Mengjie & Wang, Yu & Wang, Chaoyang & Yan, Junjie, 2024. "Digital twin modeling and operation optimization of the steam turbine system of thermal power plants," Energy, Elsevier, vol. 290(C).
    14. Wei Wang & Yang Sun & Sitong Jing & Wenguang Zhang & Can Cui, 2018. "Improved Boiler-Turbine Coordinated Control of CHP Units with Heat Accumulators by Introducing Heat Source Regulation," Energies, MDPI, vol. 11(10), pages 1-15, October.
    15. Lin, Xiaolong & Meng, Xianchen & Song, Huchao & Liu, Yinhe, 2024. "Efficiency improvement and flexibility enhancement by molten salt heat storage for integrated gasification chemical-looping combustion combined cycle under partial loads," Energy, Elsevier, vol. 303(C).
    16. Xingshuo Li & Jinfu Liu & Jiajia Li & Xianling Li & Peigang Yan & Daren Yu, 2020. "A Stacked Denoising Sparse Autoencoder Based Fault Early Warning Method for Feedwater Heater Performance Degradation," Energies, MDPI, vol. 13(22), pages 1-21, November.
    17. Zhao, Haitao & Jiang, Peng & Chen, Zhe & Ezeh, Collins I. & Hong, Yuanda & Guo, Yishan & Zheng, Chenghang & Džapo, Hrvoje & Gao, Xiang & Wu, Tao, 2019. "Improvement of fuel sources and energy products flexibility in coal power plants via energy-cyber-physical-systems approach," Applied Energy, Elsevier, vol. 254(C).
    18. Brändle, Gregor & Schönfisch, Max & Schulte, Simon, 2020. "Estimating Long-Term Global Supply Costs for Low-Carbon Hydrogen," EWI Working Papers 2020-4, Energiewirtschaftliches Institut an der Universitaet zu Koeln (EWI), revised 10 Aug 2021.
    19. Shan, Shiquan & Tian, Jialu & Chen, Binghong & Zhang, Yanwei & Zhou, Zhijun, 2023. "Theoretical and technical analysis of the photo-thermal energy cascade conversion for fuel with high-temperature combustion," Energy, Elsevier, vol. 263(PD).
    20. Yan, Hui & Liu, Ming & Wang, Zhu & Zhang, Kezhen & Chong, Daotong & Yan, Junjie, 2023. "Flexibility enhancement of solar-aided coal-fired power plant under different direct normal irradiance conditions," Energy, Elsevier, vol. 262(PA).

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:energy:v:238:y:2022:i:pc:s0360544221022313. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.