منابع مشابه
Frequency and Causes of Grain Dust Explosions
Grain dust explosions at elevators are in reality a series of explosions. The first explosion referred to as the "primary explosion" is usually small with pressures less than 2 pounds per square inch, (psi). It propagates a pressure wave and fire front. The pressure wave moves away from the location of the primary explosion at a speed of about 1000 feet per second (fps) while the fire front fol...
متن کاملEffect of Radiation Heat Loss and Ventilation on Dust Explosions in Spherical Vessels
The flame propagation through a coal dust-air mixture in a spherical vessel was studied by means of a one-dimensional, Arrhenius-type kinetics and quasi-steady model. The model includes the evaporation of the volatile matter of dust particles into a known gaseous fuel (methane) and the single-stage reaction of the gas-phase combustion. Effect of venting devices as safety idea and the radiation ...
متن کاملHybrid Mixtures Explosions: When Vapours Met Dusts
The aim of this work is to demonstrate the peculiar aspects of hybrid mixtures explosion as regard to vapours or dusts explosions. This work has been focused on pharmaceutical products from excipients (magnesium stearate), vitamins (niacin) to active principles (antibiotics) and their associated solvants (ethanol, diisopropyl ether, toluene. . .). Explosion spheres have been used to determined ...
متن کاملTransition from Deflagration to Detonation in Layered Dust Explosions
Dust layers on the bottom of mine tunnels, on fac toy floors, or on the floors of gruin elevator passages are the most frequent cause of highly destructive dust explosions. Typically, such layered dust explosions involve a high velocity, acceleruting, turbulent flame which is fed by the dust layer and results in high clestructivt' static and dynamic pressures. In some cases transition to detona...
متن کاملHow does limestone rock dust prevent coal dust explosions in coal mines?
Coal dust explosions in underground coal mines are pre vented by a generous application of rock dust (usually lime stone). If an explosion should occur, the rock dust disperses, mixes with the coal dust and prevents fl ame propagation by acting as a thermal inhibitor or heat sink. To investigate this process in more detail, a number of ex plosion experiments using various coal dust and limes...
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ژورنال
عنوان ژورنال: Combustion and Flame
سال: 1993
ISSN: 0010-2180
DOI: 10.1016/0010-2180(93)90045-5