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The use of rice husks as biomass boiler fuel carries the risk of dust explosions due to suspended rice husk dust forming a dust cloud in the air, which can cause an explosion at certain concentrations if an ignition source is present. Between January 1 and July 1, 2023, there were 159 fire incidents, 32 explosions, 71 injuries, and 48 deaths related to dust explosions in the industry. This study conducted numerical simulations to analyze the impact of airflow velocity on the dispersion of rice husk dust concentration in the air to identify potential dust explosion hazards in rice husk storage areas. Numerical simulations based on Computational Fluid Dynamics (CFD) were conducted using SALOME software for 3D modeling and pre-processing, OpenFoam for solving processes, and Paraview for post-processing. The simulation results show that high wind speeds can disperse dust concentrations widely enough to not reach the Minimum Explosive Concentration (MEC). The research results show that there are areas with high dust concentrations, especially in the area around the right side of the moving floor with a dust concentration of around 56–198 g/m3 which meets the Minimum Explosive Concentration (MEC), thereby creating a risk of dust explosions. The CFD simulation results were then processed using the Hazardous Area Classification (HAC) method to classify dust explosion hazards in the rice husk storage area. Based on HAC, the moving floor area is classified as zone 21, while other warehouse areas are classified as zone 22.

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Hazardous Area Classification (HAC) in the Biomass Warehouse Using Study Numeric to Identify the Zone of Dust Explosion Risk

  • 会议论文

  • 发表日期：

    2025年

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  • Akhmad Rizky Tofan Hari Saputra,
  • Aulia Yasfa Azzahra,
  • Burniadi Moballa,
  • Wiwik Dwi Pratiwi,
  • Agung Nugroho

摘要

The use of rice husks as biomass boiler fuel carries the risk of dust explosions due to suspended rice husk dust forming a dust cloud in the air, which can cause an explosion at certain concentrations if an ignition source is present. Between January 1 and July 1, 2023, there were 159 fire incidents, 32 explosions, 71 injuries, and 48 deaths related to dust explosions in the industry. This study conducted numerical simulations to analyze the impact of airflow velocity on the dispersion of rice husk dust concentration in the air to identify potential dust explosion hazards in rice husk storage areas. Numerical simulations based on Computational Fluid Dynamics (CFD) were conducted using SALOME software for 3D modeling and pre-processing, OpenFoam for solving processes, and Paraview for post-processing. The simulation results show that high wind speeds can disperse dust concentrations widely enough to not reach the Minimum Explosive Concentration (MEC). The research results show that there are areas with high dust concentrations, especially in the area around the right side of the moving floor with a dust concentration of around 56–198 g/m3 which meets the Minimum Explosive Concentration (MEC), thereby creating a risk of dust explosions. The CFD simulation results were then processed using the Hazardous Area Classification (HAC) method to classify dust explosion hazards in the rice husk storage area. Based on HAC, the moving floor area is classified as zone 21, while other warehouse areas are classified as zone 22.