By Nicholas P. Cheremisinoff
This convenient quantity is a prepared “go to” reference for the chemical engineer, plant supervisor, method engineer, or chemist operating in commercial settings the place dirt explosions can be a drawback, reminiscent of the method industries, coal undefined, steel undefined, and others. notwithstanding dirt explosions were round because the Earth first shaped, they usually were studied and written approximately because the 1500s, they're nonetheless an ongoing situation and take place virtually day-by-day someplace on the earth, from bakeries to fertilizer plants.
Dust explosions could have devastating effects, and, lately, there were new commercial criteria and directions that mirror more secure, extra average tools for facing fabrics to avoid dirt explosions and resultant fires. This booklet not just provides those new advancements for engineers and bosses, however it deals an intensive and deep assurance of the topic, beginning with an entire assessment of dirt, the way it types, whilst it really is at risk of exploding, and the way this chance could be mitigated. there's additionally a normal insurance of explosions and the environments that foster them.
Further chapters conceal person industries, comparable to steel and coal, and there's an appendix that outlines most sensible practices for fighting dirt explosions and hearth and the way those dangers might be systematically mitigated by means of those implementations. there's additionally a convenient thesaurus of phrases for simple entry, not just for the veteran engineer or chemist, yet for the coed or new hire.
This prepared reference is without doubt one of the most beneficial texts that an engineer or chemist may have at their side. With such a lot of injuries nonetheless taking place in this day and such a lot of risks, this quantity pinpoints the most typical and least difficult methods for the engineer to move approximately his day-by-day enterprise competently, successfully, and profitably, with out extraneous tables or theoretical treatises. a must-have for any engineer, scientist, or chemist operating with fabrics that may lead to dirt explosions or fire.
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Additional info for Dust Explosion and Fire Prevention Handbook: A Guide to Good Industry Practices
Examples of equivalent diameter definitions are as follows: • Sieve equivalent diameter – diameter equal to the diameter of a sphere passing through the same sieve aperture as a particle. • Surface area equivalent diameter – diameter equal to the diameter of a sphere with the same surface area as a particle. • Aerodynamic diameter – diameter of a unit density sphere having the same terminal settling velocity as the particle being measured. This diameter is very important for describing particle motion in impactors and cyclone separators.
Additional definitions are necessary, especially when considering powders. • Bed or bulk density - mass of particles in a bed or other sample volume occupied by particles and voids between them. 28 Dust Explosion and Fire Prevention Handbook • Tap density - density after being “packed”, mass/volume. • Void fraction - volume of voids between particles volume occupied by particles and voids between them. Particle size- equivalent diameters – There are several definitions that one may apply. Examples of equivalent diameter definitions are as follows: • Sieve equivalent diameter – diameter equal to the diameter of a sphere passing through the same sieve aperture as a particle.
Hot temperatures, burning embers and agglomerates, self-heating, impact/friction, electrical equipment and electrostatic discharges. 1 Hot Surfaces An example of a hot surface is a dust cloud accidentally entering a hot oven or furnace. In a plastics plant a phenolic resin dust explosion incident 34 Dust Explosion and Fire Prevention Handbook occurred because a resin dust cloud was generated during the cleaning of fugitive dust from the area around the oven. In an application like this it is important to know the minimum dust cloud oven ignition temperature, which can be determined by oven tests described in ASTM E1491.