J. Phys. IV France
Volume 12, Numéro 7, August 2002
Page(s) 149 - 156

J. Phys. IV France
12 (2002) Pr7-149
DOI: 10.1051/jp4:20020278

Studies of dust explosion suppression by water sprays and extinguishing powders

M. Gieras and R. Klemens

Warsaw University of Technology, Institute of Heat Engineering, Nowowiejska 21-25, 00-665 Warsaw, Poland

A comparison of effectiveness of water sprays, neutral dusts and typical extinguishing powders in the suppression process of organic dust - air mixtures explosions is presented. The research was carried out in the 1.25 m 3 explosion chamber. The corn starch - air mixture of 175 g/m 3 concentration was used in the explosion processes. Three specially designed swirl nozzles were used for spraying the water and another nozzle was used for dispersion of the neutral and extinguishing powders It was found that the water spray could be more effective as dust explosion suppression medium than the typical extinguishing powders.

© EDP Sciences 2002