Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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A Numerical Study on the Mitigation Effect of Water Curtain for SiCl4 Toxic Gas Release

SiCl4 누출 시 수막설비의 방재효과에 대한 수치 해석 연구

  • 류태인 (화학물질안전원 사고예방심사2과) ;
  • 이은미 (화학물질안전원 사고예방심사1과) ;
  • 김승하 (화학물질안전원 사고예방심사1과) ;
  • 강성미 ((주)앤플럭스 유동2팀) ;
  • 신창현 (화학물질안전원 사고예방심사2과) ;
  • 조승범 (화학물질안전원 사고예방심사2과)
  • Received : 2023.02.02
  • Accepted : 2023.06.13
  • Published : 2023.06.30
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Abstract

Silicone tetrachloride (SiCl4) leak accidents cause enormous human and environmental damage because it is highly toxic. Some handling facilities use water curtains to reduce the impact range of SiCl4. Although the water curtain is known as one of the most efficient technologies for post-release mitigation, its effect on reducing SiCl4 concentration needs to be investigated scientifically and quantitatively. In this study, three-dimensional computational fluid dynamics (CFD) was used to investigate the physical and chemical effects of water curtains as a release-mitigation system for SiCl4. SiCl4 is released and dispersed five seconds prior to the operation of the water curtain. Once the water curtain works, the SiCl4 reacts chemically with the water and its concentration decreases rapidly; it reaches an emergency response planning guidelines level 2 (ERPG-2) of 5 parts per million (ppm) at about 570 m. We observed, however, that the physical effect of water curtains on reducing SiCl4 concentration is insignificant when the chemical effect is eliminated. These results are crucial since they can be a scientific and quantitative basis for the 'technical guidelines for estimating the accident affected range'. In order to protect the public from chemical accidents, more toxic gas mitigation technologies need to be developed.

Keywords

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