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Pilot-Scale Experiences on a Plasma Ignition System for Pulverized Fuels

Author

Listed:
  • Reyhane Youssefi

    (Institute of Combustion and Power Plant Technology, University of Stuttgart, Pfaffenwaldring 23, 70569 Stuttgart, Germany)

  • Jörg Maier

    (Institute of Combustion and Power Plant Technology, University of Stuttgart, Pfaffenwaldring 23, 70569 Stuttgart, Germany)

  • Günter Scheffknecht

    (Institute of Combustion and Power Plant Technology, University of Stuttgart, Pfaffenwaldring 23, 70569 Stuttgart, Germany)

Abstract

The need for flexible power generation is growing worldwide as the energy transition is altering the operational regimes of thermal power plants. Plasma ignition systems, as an alternative technology to the conventional start-up method with natural gas or oil firing, offer a cost- and energy-efficient start-up process in pulverized fuel power stations. The application of plasma ignition systems for cold start-ups using different qualities of pre-dried lignite is investigated in a pilot-scale combustion facility. A plasma integrated swirl burner is developed and validated using highly ignitable lignite dust. Eight pre-dried lignite qualities with a moisture content of up to 30% and a broad particle size distribution are investigated for this application to determine the applicability and limitations of the plasma ignition system with regard to the fuel quality. The performance of lignites for cold start-up in the plasma ignition system are categorized based on their ignition and combustion performance. All lignite qualities were ignited under the cold-start-up condition with a plasma power of 4 kW to 7 kW. Lignite qualities with a moisture content of up to 20% and a median particle size of below 450 μm form a self-sustained flame with short-time plasma-supported combustion, while flame blow-out is observed for lignites with lower qualities.

Suggested Citation

  • Reyhane Youssefi & Jörg Maier & Günter Scheffknecht, 2021. "Pilot-Scale Experiences on a Plasma Ignition System for Pulverized Fuels," Energies, MDPI, vol. 14(16), pages 1-17, August.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:16:p:4726-:d:608138
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    References listed on IDEAS

    as
    1. Tadeusz Mączka & Halina Pawlak-Kruczek & Lukasz Niedzwiecki & Edward Ziaja & Artur Chorążyczewski, 2020. "Plasma Assisted Combustion as a Cost-Effective Way for Balancing of Intermittent Sources: Techno-Economic Assessment for 200 MW el Power Unit," Energies, MDPI, vol. 13(19), pages 1-16, September.
    2. Youssefi, Reyhane & Maier, Joerg & Scheffknecht, Guenter, 2021. "Experimental investigations on plasma-assisted wood pellet ignition for the start-up of biomass-fired power stations," Renewable and Sustainable Energy Reviews, Elsevier, vol. 138(C).
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    Cited by:

    1. Reyhane Youssefi & Tom Segers & Frederik Norman & Jörg Maier & Günter Scheffknecht, 2021. "Experimental Investigations of the Ignitability of Several Coal Dust Qualities," Energies, MDPI, vol. 14(19), pages 1-15, October.

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