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<p>The rotary kiln has been widely used in the&#xa0;chemical pyrolysis industry for decades. This study focused on elucidating the impact of incorporating baffles on the motion of pesticide waste salt (WS) particles during pyrolysis in a rotary kiln. Through discrete element method software simulation, the effects of different baffle lengths (75&#xa0;cm, 120&#xa0;cm, and 150&#xa0;cm) and baffle angles (0°, 15°, and 45°) were investigated to provide valuable insights into predicting the movement and heat transfer of WS. The simulation results indicated that the length of the baffle had a significant impact on the behavior of WS particles with longer baffles resulting in enhanced mean residence time and velocity of particles but the reduced temperature variations. These changes were accompanied by a cyclic pattern of initially rising and subsequently falling velocities. Conversely, the baffle setting angle exhibits an insignificant impact in most cases. Notably, the inclusion of baffles enhanced the elastic forces generated by particle collisions, as well as friction from rolling and relative sliding, which led to enhanced particle dispersion and rotation of WS particles. The findings confirmed that incorporating baffles positively affected both particle movement and heat transfer, thereby relieving the burden associated with subsequent management and disposal processes.</p>

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Impacts of baffle setting in rotary kiln on pyrolysis movement of pesticide waste salt particles

  • 期刊论文

  • 发表日期：

    2025年3月18日

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  • Yueyan Song,
  • Wenjun Shang,
  • Miao Shang,
  • Zhaomin Wang,
  • Di He

摘要

The rotary kiln has been widely used in the chemical pyrolysis industry for decades. This study focused on elucidating the impact of incorporating baffles on the motion of pesticide waste salt (WS) particles during pyrolysis in a rotary kiln. Through discrete element method software simulation, the effects of different baffle lengths (75 cm, 120 cm, and 150 cm) and baffle angles (0°, 15°, and 45°) were investigated to provide valuable insights into predicting the movement and heat transfer of WS. The simulation results indicated that the length of the baffle had a significant impact on the behavior of WS particles with longer baffles resulting in enhanced mean residence time and velocity of particles but the reduced temperature variations. These changes were accompanied by a cyclic pattern of initially rising and subsequently falling velocities. Conversely, the baffle setting angle exhibits an insignificant impact in most cases. Notably, the inclusion of baffles enhanced the elastic forces generated by particle collisions, as well as friction from rolling and relative sliding, which led to enhanced particle dispersion and rotation of WS particles. The findings confirmed that incorporating baffles positively affected both particle movement and heat transfer, thereby relieving the burden associated with subsequent management and disposal processes.