A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Dust explosions: Is your safety blanket in place?
Some of the most spectacular industrial catastrophes have been caused by the accidental ignition of dusts, moving the prevention of that problem into the forefront of process safety planning. Engineers must first determine a facility's susceptibility to explosion and then take the appropriate measures to ensure that one does not occur. The first stage of the hazard assessment is to determine whether the dust is combustible and will explode when dispersed. In an explosion screening test, the flame propagation is analyzed to determine whether or not a suspended dust is capable of initiating and sustaining an explosion under the process conditions. The ignition sensitivity of a dust cloud or layer is determined by the Minimum ignition energy (MIE), Minimum ignition temperature (MIT), Minimum explosive concentration (MEC), and the Limiting oxygen concentration (LOC). The next step calls for a measurement of the dust explosion severity to determine the need for explosion protection measures. When powders are exposed to elevated temperatures, for example during drying operations, the following thermal stability tests could be conducted: bulk solid screening test, aerated powder screening test, powder layer screening test. Dust explosion hazards ca be reduced by avoiding the formation of dust clouds. there are two main methods of ventilation for controlling flammable atmospheres: dilution ventilation and local exhaust ventilation. When combustible dusts are handled in closed systems, explosions may be prevented by controlling the oxygen content of the enclosed atmosphere. The techniques that are commonly used to achieve an inert atmosphere in a vessel include pressure purging, vacuum purging and flow-through purging. If the formation of a flammable atmosphere cannot be prevented, measures must be taken to protect against ensuring consequences. Methods of protecting process vessel against the consequences of a dust explosion inside it are explosion relief venting, explosion suppression, containment and isolation.
Dust explosions: Is your safety blanket in place?
Some of the most spectacular industrial catastrophes have been caused by the accidental ignition of dusts, moving the prevention of that problem into the forefront of process safety planning. Engineers must first determine a facility's susceptibility to explosion and then take the appropriate measures to ensure that one does not occur. The first stage of the hazard assessment is to determine whether the dust is combustible and will explode when dispersed. In an explosion screening test, the flame propagation is analyzed to determine whether or not a suspended dust is capable of initiating and sustaining an explosion under the process conditions. The ignition sensitivity of a dust cloud or layer is determined by the Minimum ignition energy (MIE), Minimum ignition temperature (MIT), Minimum explosive concentration (MEC), and the Limiting oxygen concentration (LOC). The next step calls for a measurement of the dust explosion severity to determine the need for explosion protection measures. When powders are exposed to elevated temperatures, for example during drying operations, the following thermal stability tests could be conducted: bulk solid screening test, aerated powder screening test, powder layer screening test. Dust explosion hazards ca be reduced by avoiding the formation of dust clouds. there are two main methods of ventilation for controlling flammable atmospheres: dilution ventilation and local exhaust ventilation. When combustible dusts are handled in closed systems, explosions may be prevented by controlling the oxygen content of the enclosed atmosphere. The techniques that are commonly used to achieve an inert atmosphere in a vessel include pressure purging, vacuum purging and flow-through purging. If the formation of a flammable atmosphere cannot be prevented, measures must be taken to protect against ensuring consequences. Methods of protecting process vessel against the consequences of a dust explosion inside it are explosion relief venting, explosion suppression, containment and isolation.
Dust explosions: Is your safety blanket in place?
Staubexplosion: Ist ihre Gesamtsicherheit in Ordnung?
Ebadat, V. (author) / Laing, C. (author)
Chemical Engineering, New York ; 110 ; 50-54
2003
5 Seiten, 8 Bilder, 2 Tabellen, 1 Quelle
Article (Journal)
English
| Springer Verlag | 2016
Engineering Index Backfile | 1957
| Engineering Index Backfile | 1933
| Engineering Index Backfile | 1945