A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Ignitability assessment of shredder dusts of refrigerator and the prevention of the dust explosion
Explosibility of polyurethane dusts produced in the recycling process of refrigerators and the ways to prevent the dust explosion were studied. In recent years, cyclopentane is often used as the foaming agent and this produces explosive atmosphere in the shredding process. The minimum explosive dust concentration decreased with the increase of cyclopentane concentration and increased with the increase of relative humidity. The minimum ignition energy was about 11 mJ. The ignition energy decreased with the increase of the cyclopentane gas concentration. Larger particle were more influenced by the increase than smaller ones. The cyclopentane gas concentration up to about 5300 ppm did not influence the explosion index and maximum explosion pressure very much. The minimum explosive concentration of polyurethane dust foamed by cyclopentane was approximately 40-190 g/m3. It will be appropriate to set the alarm level for cyclopentane gas at 1000-2000 ppm to prevent the dust explosion. Relative humidity will need to be increased up to about 95% to suppress the ignition. Applying water spray may be a practical way to prevent explosion.
Ignitability assessment of shredder dusts of refrigerator and the prevention of the dust explosion
Explosibility of polyurethane dusts produced in the recycling process of refrigerators and the ways to prevent the dust explosion were studied. In recent years, cyclopentane is often used as the foaming agent and this produces explosive atmosphere in the shredding process. The minimum explosive dust concentration decreased with the increase of cyclopentane concentration and increased with the increase of relative humidity. The minimum ignition energy was about 11 mJ. The ignition energy decreased with the increase of the cyclopentane gas concentration. Larger particle were more influenced by the increase than smaller ones. The cyclopentane gas concentration up to about 5300 ppm did not influence the explosion index and maximum explosion pressure very much. The minimum explosive concentration of polyurethane dust foamed by cyclopentane was approximately 40-190 g/m3. It will be appropriate to set the alarm level for cyclopentane gas at 1000-2000 ppm to prevent the dust explosion. Relative humidity will need to be increased up to about 95% to suppress the ignition. Applying water spray may be a practical way to prevent explosion.
Ignitability assessment of shredder dusts of refrigerator and the prevention of the dust explosion
Prüfung der Entzündbarkeit von Shredderstaub aus Kühlschrank-Altgeräten und Verhütung der Staubexplosion
Nifuku, M. (author) / Tsujita, H. (author) / Fujino, K. (author) / Takaichi, K. (author) / Barre, C. (author) / Paya, E. (author) / Hatori, M. (author) / Fujiwara, S. (author) / Horiguchi, S. (author) / Sochet, I. (author)
2006
6 Seiten, 10 Bilder, 1 Tabelle, 5 Quellen
Conference paper
English
Dust Explosion Quantitative Risk Management for Nontraditional Dusts
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