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Structure Optimization of Gliding Arc Electrodes for Seed Treatment Based on the Study of Plasma Distribution Characteristics

Author

Listed:
  • Linjie Hao

    (College of Engineering, China Agricultural University, Beijing 100083, China)

  • Yong You

    (College of Engineering, China Agricultural University, Beijing 100083, China)

  • Yunting Hui

    (College of Engineering, China Agricultural University, Beijing 100083, China)

  • Decheng Wang

    (College of Engineering, China Agricultural University, Beijing 100083, China)

  • Changyong Shao

    (College of Engineering, China Agricultural University, Beijing 100083, China
    Shandong Province Seeds Group Co., Ltd., Jinan 250100, China)

Abstract

Plasma seed pretreatment is an important means to rapidly improve seed quality. The studies on plasma-generating devices suitable for continuous seed pretreatment at atmospheric pressure have been relatively limited. Gliding arc discharge can generate atmospheric pressure plasma at room temperature, which provides a new way to use plasma to treat seeds at ambient temperature and pressure. By analyzing the influence of structural characteristics, such as gliding arc electrode shape, discharge distance, and electrode opening angle on plasma distribution, a plasma seed treatment method based on negative pressure guidance was proposed, and the electrode structure was optimized. The results show that the reasonable matching of electrode structure parameters can improve the gliding arc guiding ability of the discharge electrode. Comparing the three electrode shapes, it was found that the triangular electrode had the best gliding arc guiding ability, and it had the potential to further increase the plasma size with the increase in the electrode size. The discharge distance and electrode opening angle had a significant impact on the gliding arc guiding ability of the discharge electrode. When the discharge distance was 15 mm and the electrode opening angle was 76°, the structure parameters of the plasma seed treatment electrode were matched with each other, and the best processing capacity was achieved. After 10 s of gliding arc plasma treatment with the optimized triangular electrode structure, the seed germination rate and germination index of Leymus chinensis ((Trin.) Tzvel) increased by 33.3% and 13.8%. This study provides a theoretical basis for the design and optimization of gliding arc electrode structures and serves as a reference for the research and development of plasma generators for continuous seed treatment at atmospheric pressure.

Suggested Citation

  • Linjie Hao & Yong You & Yunting Hui & Decheng Wang & Changyong Shao, 2024. "Structure Optimization of Gliding Arc Electrodes for Seed Treatment Based on the Study of Plasma Distribution Characteristics," Agriculture, MDPI, vol. 14(8), pages 1-15, August.
  • Handle: RePEc:gam:jagris:v:14:y:2024:i:8:p:1379-:d:1457688
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    References listed on IDEAS

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    1. Salit Supakitthanakorn & On-Uma Ruangwong & Choncharoen Sawangrat & Wimada Srisuwan & Dheerawan Boonyawan, 2023. "Potential of Nonthermal Atmospheric-Pressure Dielectric Barrier Discharge Plasma for Inhibition of Athelia rolfsii Causing Southern Blight Disease in Lettuce," Agriculture, MDPI, vol. 13(1), pages 1-14, January.
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