A Study on The Spontaneous Ignition of a Hydroxy Propyl Methyl Cellulose Dust Cloud

Hydroxy Propyl Methyl Cellulose 분진의 운상자연발화에 관한 연구

  • Lim, Woo-Sub (Department of Safety Engineering, Graduate school, Pukyong National University) ;
  • Mok, Yun-Soo (Department of Safety Engineering, Pukyong National University)
  • 임우섭 (부경대학교 안전공학과 대학원) ;
  • 목연수 (부경대학교 안전공학과)
  • Published : 2004.03.01

Abstract

The minimum ignition temperature at which the dust cloud can spontaneously ignite is considered to be very important in industries to prevent explosion occurring in hot surfaces. This paper has dealt with the experimental study of the determination of minimum ignition temperature of Hydroxy Propyl Methyl Cellulose (HPMC) dust cloud. We have used the Godbert-Greenwald Furnace Apparatus to determine the ignition temperature and limiting oxyten concentration for dust could. The experimental determinations on the minimum ignition temperature were carried out with various particle size with nominal diameters 45, 75 and 106${\mu}m$. The limiting oxygen concentration of dust cloud was determinated for the smaller size(45${\mu}m$) HPMC. Minimum ignition temperature of dust cloud was at 364$^{\circ}C$ for the concentration of 2.5g/L in the air and became higher with the increasing of nitrogen concentration. It was also found that the ignition didn't occur when the oxygen concentration was below 10%, and limiting oxygen concentration is at 11%.

Keywords

dust cloud;minimum ignition temperature;limiting oxygen concentration;Hydroxy Propyl Methyl Cellulose;Godbert-Greenwald Furnace Apparatus

References

  1. P. Field, 'Dust Explosion', Elsevier Sci. Pub., Amsterdam, 1982
  2. Waylcrnd C. Griffith, 'Dust Explosion' Ann. Rev. Fluid Mech, 1978
  3. Manju Mittal, B.K. Guha, 'Study of Ignition Temperature of a Polyethylene Dust Cloud', Fire and materials, Vol. 20, pp. 97-105, 1996 https://doi.org/10.1002/(SICI)1099-1018(199603)20:2<97::AID-FAM568>3.0.CO;2-L
  4. Norbert Jaeger, Richard Siwek, 'Prevent Explosion of Combustible Dust', Chem. Eng. Prog., Vol. 3, pp. 25-37, 1999
  5. Richard E. Cocks, 'Dust Explosion: Prevention and control', Chemical engineering, pp. 94, 1979
  6. Y.S. Mok, J. S. Kim, S.H. Park, 'A Study on the Ignition Energy of MBS Dust Explosion', Proceeding of the 1st Conference of the Association of Korean-Japanese Safety Engineering Society, pp. 172-175, 1999