Dust Explosion - an overview | ScienceDirect Topics
Dust explosion may happen when these five factors occur together (Fig. 10): (i) the presence of combustible dust in a finely divided form; (ii) availability of oxidant; (iii) presence of an ignition source; (iv) some degree of confinement; and (v) state of mixed reactants (Abbasi & …
Dust Explosion - an overview | ScienceDirect Topics
Dust explosions occur when combustible dusts are suspended in air or some other flammable atmosphere and are subjected to a source of ignition. The severity of a dust explosion depends on many factors, but a principal influence is the particle size becausethe consequences of a dust explosion worsen with decrease in particle size.
Dust explosions: Fundamentals - ScienceDirect
2019年1月1日 · The dust explosion was initiated by a local hydrogen/oxygen explosion at the bottom tube end. At an oats dust concentration of 250–270 g/m 3 (slightly below stoichiometric) the measured detonation front velocity was 1540 m/s, which is somewhat lower than the theoretical Chapman-Jouguet velocity at stoichiometric concentration of about 1800 m/s.
Dust Explosion - an overview | ScienceDirect Topics
Polanczyk et al. (2013) replaced dust with a flammable gas-air mixture to evaluate the performance of venting devices in an industrial countercurrent spray tower during a dust explosion, using a CFD model. Song et al. (2019) modeled the aluminum dust explosion venting using the 2D rotational-axis symmetric CFD simulation method. The simulations ...
Dust explosions: An overview - ScienceDirect
2019年1月1日 · Within the broad field of dust explosion risk reduction, the current book is aimed at providing readers with a roadmap for gaining an appreciation of the veracity of the above points. Motivation for its preparation comes from the ongoing challenge of effectively communicating the process safety nature of dust explosions to stakeholders most ...
CCOHS: Combustible Dust
2024年5月10日 · The primary dust explosion is the first explosion. It occurs when there is a dust suspension in a confined space (such as a container, room, or piece of equipment) that is ignited and explodes. The primary explosion will shake other dust that has accumulated. When this dust becomes airborne, it also ignites. This secondary dust explosion is ...
Dust explosions–Cases, causes, consequences, and control
2007年2月9日 · A dust explosion, which was caused during the welding of a spout, excessively worn by the flow of grain, occurred in the Kampffmeyer grain silo at Albern near Vienna, Austria, 4 July 1960. The welding was being performed in the elevator pit, when a spark ignited the dust in the running bucket elevator.
Dust explosion risk in polymer powder processing: review and …
2024年12月8日 · The rubber sector is recognized as being subject to a high risk of dust explosion due to the nature of the materials used (rubber compounds and additives), the presence of activities involving the generation of fine particles (such as during milling, grinding, or transport operations), and specific equipment that could allow dust accumulation ...
Dust explosion risk in metal workings - ScienceDirect
2019年9月1日 · The welding process in itself is an efficient ignition source for a dust explosion if any combustible dust cloud is present nearby. The American Welding Society (2013) published a bulletin in which the hazards of welding procedures, with respect to the occurrence of dust explosions, are illustrated. Dust trails on the surface of workbenches and ...
Dust Explosion Dynamics | ScienceDirect
Dust fire and explosion dynamics is the investigation of the physical and chemical phenomena that govern combustible dust hazards. This chapter explores the use of fundamental principles of combustion to evaluate the magnitude of combustible dust hazards in a variety of settings.