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Analysis of a double-pressure double-extraction (DPDE) control dust removal system and optimal installation position of an air curtain generator

Author

Listed:
  • Cheng, Chuanxing
  • Liu, Qiang
  • Hua, Yun
  • Guo, Lidian
  • Zhang, Haonan
  • Zhu, Zilian
  • Nie, Wen

Abstract

To reduce dust pollution during the excavation process of coal mine tunnels, this study combines theoretical analysis, numerical simulation, and on-site measurements to study the distribution of the wind flow field and the diffusion of dust pollution in the double-pressure double-extraction (DPDE) ventilation control and dust removal system. The double longitudinal fan-shaped wind screen generator creates two fan-shaped wind screens that form a wind field directed toward the working surface after hitting the tunnel wall. This setup blocks the dust at the front end of the tunnel. The dust-containing wind flow is jointly pumped by the double extractor cylinders and then absorbed and purified by the double-cylinder convective onboard dust removal fan. The dust concentration behind the wind screen was close to 0 mg/m3 and the dust concentration in the breathing area of the roadheader driver was 218.44 mg/m3. Additionally, we examined the effect of the installation position (L) of the double longitudinal fan-shaped air curtain generator on dust control. The results of the study show that L = 30m is the optimal installation position and the dust concentration at the driver of the roadheader is reduced to less than 5 mg/m3.

Suggested Citation

  • Cheng, Chuanxing & Liu, Qiang & Hua, Yun & Guo, Lidian & Zhang, Haonan & Zhu, Zilian & Nie, Wen, 2024. "Analysis of a double-pressure double-extraction (DPDE) control dust removal system and optimal installation position of an air curtain generator," Energy, Elsevier, vol. 313(C).
    • Handle: RePEc:eee:energy:v:313:y:2024:i:c:s0360544224038003
    DOI: 10.1016/j.energy.2024.134022
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