A study of the hydrodynamics of steam-assisted coal particles removal

International Journal of Energy and Environmental Engineering (2021)Cite this article

Abstract

The presence of coal particles, as well as the acidic aerosol in the exhaust gases from the coal-fired power plants, present a major threat to the global atmosphere. Here, the hydrodynamics of the orthogonal injection of the steam into the square duct flow channel through which the air containing coal particulates has been investigated. The steam was injected into the flow channel to wet the coal particles to enable their separation from the air based on the particles becoming heavier. The experimental setup used in the present study consisted of the 2 cm × 2 cm square flow duct made of the transparent Perspex and was 50 cm long. The mixture of air and coal particles was introduced at one end of the duct, and a centrifugal rotator was located at the other end of the duct, which was used to separate the coal particles from the wet coal particles from the air. And swirling steam was injected into the duct by two nozzles located at lower and upper surfaces of the duct. PIV images of the flow field at varying steam and air pressure and making use of the measurements of the turbulent fluctuating velocities, relative velocity and transient analysis, spike in removal efficiency of the coal particles from the air was found as 4–7%, corresponding to the range of particle sizes, 0.30–0.45 μm, inlet steam pressure of 1.5 bars and air pressure varying from 0.4 to 3.0 bars. However, the overall separation efficiency was obtained as 51%.

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Acknowledgement

The authors are thankful to the Russian Government and Institute of Engineering and Technology, Department of Hydraulics and Hydraulic and Pneumatic Systems, South Ural State University, Lenin prospect 76, Chelyabinsk, 454080, Russian Federation for their support to this work through Act 211 Government of the Russian Federation, contract No. 02. A03.21.0011.

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Affiliations

  1. Institute of Engineering and Technology, Department of Hydraulics and Hydraulic and Pneumatic Systems, South Ural State University (SUSU), Lenin Prospect 76, Chelyabinsk, 454080, Russian Federation

    Afrasyab Khan, Spiridonov Evgeny Konstantinovich & Khabarova Darya Fedorovna

  2. Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Vietnam

    Khairuddin Sanaullah

  3. Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam

    Khairuddin Sanaullah

  4. Department of Mechanical and Manufacturing Engineering, Faculty of Engineering, University Malaysia Sarawak (UNIMAS), 94300, Kota Samarahan, Sarawak, Malaysia

    Andrew Ragai Henry Rigit

  5. Department of Chemical Engineering, Pakistan Institute of Engineering & Applied Sciences (PIEAS), PO Box Nilor, Islamabad, 44000, Pakistan

    Atta Ullah

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  1. Afrasyab Khan
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  2. Khairuddin Sanaullah
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  3. Spiridonov Evgeny Konstantinovich
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  4. Khabarova Darya Fedorovna
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  5. Andrew Ragai Henry Rigit
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  6. Atta Ullah
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Correspondence to Afrasyab Khan.

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Khan, A., Sanaullah, K., Konstantinovich, S.E. et al. A study of the hydrodynamics of steam-assisted coal particles removal. Int J Energy Environ Eng (2021). https://doi.org/10.1007/s40095-020-00368-8

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Keywords

  • Steam-water flow
  • Coal particles
  • Hydrodynamics
  • Steady flow
  • Transient flow
  • Efficiency