Journal of the Korean Institute of Gas (한국가스학회지)

The Korean Institute of GAS (한국가스학회)
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The Measurement of Minimum Ignition Energy and Explosion Limit for Pine Tree Dust

소나무 분진의 최소착화에너지와 폭발한계 측정에 관한 연구

  • Choi Il-Gon (Dongkwang Chemical) ;
  • Cho Il-Keon (Dept. of Safety Engineering, Pukyong National University) ;
  • Mok Yun-Soo (Dept. of Safety Engineering, Pukyong National University) ;
  • Lee Dong-Hoon (Dept. of Safety Engineering, Pukyong National University) ;
  • Choi Jae-Wook (Dept. of Safety Engineering, Pukyong National University) ;
  • Ha Dong-Myeong (Dept. of Industrial Safety Engineering, Semyung University)
  • Published : 1998.06.01
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Abstract

In this study, we investigated the dust explosion characteristics by determining minimum ignition energy and explosion limit for this experiment, we used pine-tree dust which was used widely for the filler of thermosetting resin. The experiment was accomplished according to the variation of discharge gap, dust concentration, particle size and humidity. The result of this experiment are as follows; (1) The relation between the discharge gap and ignition energy was that ignition energy decreased according as the discharge gap became small, but increased when the discharge gap was below 4mm and suddenly became infinite when the discharge gap was below. So, we knew that this infinite value was limit discharge gap. (2) When the dust concentration increase and the particle size became microscopic it was easy to explore and in the same particle size, if the humidity increase the minimum ingnition energy decreased.

열경화성 수지의 충전제로 많이 사용되고 있는 소나무 분진을 시료로 분진폭발의 최소착화에너지와 폭발한계를 측정하여 분진폭발 특성을 고찰하였다. 실험은 전극간 거리, 분진운 농도, 분진입도 및 수분 등에 대한 실험을 행하였다. 그 결과 전극간 거리가 4mm 이하로 되면 증가하는 경향을 나타내었으며, 2mm 이하에서는 착화에너지가 갑자기 무한대로 되어 이 값이 한계전극 거리임을 알았다. 또한 분진운 농도가 증가하고 분진 입도가 미세할수록 폭발성이 용이하였으며, 동일한 입도의 분진에서 수분 함유량이 증가할수록 최소착화에너지가 증가하였다.

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