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<p>In order to solve the problems of unclear atomization pattern and unclear dust mist coagulation characteristics of the existing atomizing nozzles under high-pressure environments, we optimized the types of atomizing nozzles through the experiments of macro-atomization characteristics of the nozzles, fine-atomization characteristics of the nozzles and coagulation characteristics of the dust mist, analyzed the spray droplet size and velocity distribution patterns under different high-pressure environments, and clarified the coagulation and characteristics of the dust mist. The results show that A-2, B-1, C-2, E-2 nozzles are suitable for short and medium distance, short distance, wide range and long distance dust suppression or dust capture. Under spray pressure of 2, 4, 6 and 8&#xa0;MPa, the characteristic particle size and average particle size of droplets of all nozzles are less than 160&#xa0;µm; with the increasing of spray pressure, the average radial velocity of A-2 nozzle, for example, increases from 0.412&#xa0;m/s to 0.548&#xa0;m/s; when the particle size of the dust-free droplets (D-ΔD) is less than 40&#xa0;µm, the ΔD/D of all the nozzles is less than 3.5%; the nozzles for effectively capturing the coal dust particles were C-2, E-2, A-2, and B-1 in the order of the nozzles.</p>

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Study on the Nozzle High-Pressure Atomization Characteristics and the Influencing Factors of Dust Mist Coagulation Under Multi-Factor Perturbation Conditions

  • 期刊论文

  • 发表日期：

    2025年12月12日

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  • Biao Sun,
  • Chunxiu Liu,
  • Jianjun Yao,
  • Gang Zhou,
  • Jingxuan Jia,
  • Zengzhi Liu

摘要

In order to solve the problems of unclear atomization pattern and unclear dust mist coagulation characteristics of the existing atomizing nozzles under high-pressure environments, we optimized the types of atomizing nozzles through the experiments of macro-atomization characteristics of the nozzles, fine-atomization characteristics of the nozzles and coagulation characteristics of the dust mist, analyzed the spray droplet size and velocity distribution patterns under different high-pressure environments, and clarified the coagulation and characteristics of the dust mist. The results show that A-2, B-1, C-2, E-2 nozzles are suitable for short and medium distance, short distance, wide range and long distance dust suppression or dust capture. Under spray pressure of 2, 4, 6 and 8 MPa, the characteristic particle size and average particle size of droplets of all nozzles are less than 160 µm; with the increasing of spray pressure, the average radial velocity of A-2 nozzle, for example, increases from 0.412 m/s to 0.548 m/s; when the particle size of the dust-free droplets (D-ΔD) is less than 40 µm, the ΔD/D of all the nozzles is less than 3.5%; the nozzles for effectively capturing the coal dust particles were C-2, E-2, A-2, and B-1 in the order of the nozzles.