Download Dust explosions in the process industries by Rolf K. Eckhoff PDF

By Rolf K. Eckhoff

ISBN-10: 0080488749

ISBN-13: 9780080488745

ISBN-10: 0750676027

ISBN-13: 9780750676021

Regrettably, airborne dirt and dust explosions are universal and dear in a wide range of industries resembling petrochemical, nutrition, paper and pharmaceutical. it really is critical that functional and theoretical wisdom of the starting place, improvement, prevention and mitigation of airborne dirt and dust explosions is imparted to the liable safeguard supervisor. the cloth during this publication deals an up to the moment review of commonly used actions, trying out equipment, layout measures and secure working thoughts. additionally supplied is an in depth and accomplished critique of the entire major stages on the subject of the possibility and keep an eye on of a dirt explosion. a useful reference paintings for undefined, security specialists and students.* a totally new bankruptcy on layout of electric gear for use in parts containing combustible/explosible airborne dirt and dust* A considerably prolonged and re-organized ultimate evaluate bankruptcy, containing approximately four hundred new literature references from the years 1997-2002* huge cross-referencing from the unique chapters 1-7 to the corresponding sections of the accelerated overview bankruptcy

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Extra resources for Dust explosions in the process industries

Example text

This is discussed in greater detail in Chapter 4. , the mass of dust per unit volume of dust clouds) is within certain limits. This is analogous to combustion of homogeneous mixtures of gas,eousfuels and air, for which the upper and lower flammability limits are well established. 3 shows the explosiblerange for a typical natural organic material, such as corn starch, in air at normal temperature and atmosphericpressure. The explosible range is quite narrow, extending over less than two orders of magnitude, from 50-100 g/m3 on the lean side to 2-3 kg/m3 on the rich one.

8 A smoldering nest in a dust or powder deposit in a silo can initiate a dust explosion if the nest is discharged into an explosible dust cloud. 9 Complex ignition sequence via gas explosion: Due to limited supply of oxygen, the smoldering nest develops CO and other combustible gases and creates an explosible mixture above the dust deposit. When the edge of the smoldering nest penetrates the top surface of the dust deposit, the gas ignites and the gas explosion blows up the silo roof, Dust deposits in the room above the silo are dispersed and a major secondary dust explosion results.

Reasonable agreement with experiments was found for a range of food and feedstuffs dust, fish meals, and cellulose. 18. The heats of combustion of PVC and polyethylene are not very different. Closed-bomb experiments also find about the same maximum pressure for very small particle sizes. I 8 The influence of chlorine in molecule of dust material on maximum explosion pressure an'd maximum rate of pressure rise in 1 m3 standard I S 0 vessels, for various particle sizes (From Bartknecht, 7978). 28 Dust Explosions in the Process Industries the rate of heat release as the median particle size increases beyond about 20 pm.

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Dust explosions in the process industries by Rolf K. Eckhoff

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