IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v12y2019i20p3807-d274400.html
   My bibliography  Save this article

Explosion Characteristics and Flame Propagation Behavior of Mixed Dust Cloud of Coal Dust and Oil Shale Dust

Author

Listed:
  • Junfeng Wang

    (College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

  • Yansong Zhang

    (College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, China
    Key Laboratory of Ministry of Education for Mine Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao 266590, China)

  • Huifeng Su

    (College of Transportation, Shandong University of Science and Technology, Qingdao 266590, China)

  • Jinshe Chen

    (College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, China
    Key Laboratory of Ministry of Education for Mine Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao 266590, China)

  • Bo Liu

    (College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

  • Yuyuan Zhang

    (College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

Abstract

Coal and oil shale are often mined and utilized together, and mixed dust is easily formed in these processes. In order to ensure safe production in these processes, the explosion characteristics of mixed dust were studied. Using a Godbert-Greenwold (G-G) Furnace experimental device, Hartmann tube experimental device, and 20 L explosion vessel, the oil shale and coal mixed dust ignition sensitivity experiment, flame propagation experiment, and explosion characteristics experiment were carried out. The minimum ignition temperature (MIT), minimum ignition energy (MIE), maximum explosion pressure ( P max ), maximum rate of pressure rise (( dp/dt ) max ), and explosibility index ( K St ) parameters and the flame propagation behavior of the mixed dust were analyzed in detail. A scanning electron microscope (SEM) analysis of the coal and oil shale dust before and after the explosion was carried out to study the changes in the microscopic morphology of the dust particles. The results show that due to the oil shale having a high volatile content and low moisture content, in the mixture, the greater the percentage of oil shale, the more likely the dust cloud is to be ignited and the faster the explosion flame is propagated; the greater the percentage of oil shale, the greater the ( dP/dt ) max and K St will be and, under a high dust concentration, a greater P max will be produced. During explosion, coal dust will experience particle pyrolysis and the gas phase combustion of the volatile matter, followed by solid phase combustion of coal char, whereas oil shale dust will only experience particle pyrolysis and the gas phase combustion of the volatile matter.

Suggested Citation

  • Junfeng Wang & Yansong Zhang & Huifeng Su & Jinshe Chen & Bo Liu & Yuyuan Zhang, 2019. "Explosion Characteristics and Flame Propagation Behavior of Mixed Dust Cloud of Coal Dust and Oil Shale Dust," Energies, MDPI, vol. 12(20), pages 1-13, October.
  • Handle: RePEc:gam:jeners:v:12:y:2019:i:20:p:3807-:d:274400
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/12/20/3807/pdf
    Download Restriction: no

    File URL: https://www.mdpi.com/1996-1073/12/20/3807/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Yan Wang & Xiangqing Meng & Wentao Ji & Bei Pei & Chendi Lin & Hao Feng & Ligang Zheng, 2019. "The Inhibition Effect of Gas–Solid Two-Phase Inhibitors on Methane Explosion," Energies, MDPI, vol. 12(3), pages 1-10, January.
    2. Jan Skřínský & Tadeáš Ochodek, 2019. "Explosion Characteristics of Propanol Isomer–Air Mixtures," Energies, MDPI, vol. 12(8), pages 1-15, April.
    3. Yimin Zhang & Yan Wang & Ligang Zheng & Tao Yang & Jianliang Gao & Zhenhua Li, 2018. "Effect of Pristine Palygorskite Powders on Explosion Characteristics of Methane-Air Premixed Gas," Energies, MDPI, vol. 11(10), pages 1-12, September.
    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. Timur Valiullin & Ksenia Vershinina & Pavel Strizhak, 2019. "Ignition of Slurry Fuel Droplets with Different Heating Conditions," Energies, MDPI, vol. 12(23), pages 1-18, November.
    2. Dongmei Wu & Jie Gao & Ke Lu, 2022. "Dust Control Technology in Dry Directional Drilling in Soft and Broken Coal Seams," Energies, MDPI, vol. 15(10), pages 1-11, May.

    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. Tadeáš Ochodek & Emmanouil Karampinis & Artur Pozarlik, 2022. "Contemporary Problems in Combustion—Fuels, Their Valorisation, Emissions, Flexibility and Auxiliary Systems," Energies, MDPI, vol. 15(5), pages 1-4, February.
    2. Yan Wang & Xiangqing Meng & Wentao Ji & Bei Pei & Chendi Lin & Hao Feng & Ligang Zheng, 2019. "The Inhibition Effect of Gas–Solid Two-Phase Inhibitors on Methane Explosion," Energies, MDPI, vol. 12(3), pages 1-10, January.
    3. Xiaohong Gui & Haiteng Xue & Junwei Zhu & Xingrui Zhan & Fupeng Zhao, 2022. "Study on Inhibition Characteristics of Composite Structure with High-Temperature Heat Pipe and Metal Foam on Gas Explosion," Energies, MDPI, vol. 15(3), pages 1-26, February.
    4. Yan Wang & Hao Feng & Yimin Zhang & Chendi Lin & Ligang Zheng & Wentao Ji & Xuefeng Han, 2019. "Suppression Effects of Hydroxy Acid Modified Montmorillonite Powders on Methane Explosions," Energies, MDPI, vol. 12(21), pages 1-12, October.

    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:gam:jeners:v:12:y:2019:i:20:p:3807-:d:274400. 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: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    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.