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Dust explosion

About: Dust explosion is a research topic. Over the lifetime, 1473 publications have been published within this topic receiving 16140 citations.


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Journal ArticleDOI
TL;DR: In this article, the authors present the state-of-the-art of dust explosion state of the art, and present the ways available to prevent dust explosion, and on cushioning the impact of a dust explosion by venting when the accident does take place.

406 citations

Journal ArticleDOI
TL;DR: In this paper, the authors provide information on the explosibility and ignitability properties of dust clouds that can be used to improve safety in industries that generate, process, use, or transport combustible dusts.
Abstract: This paper is an overview of and introduction to the subject of dust explosions. The purpose is to provide information on the explosibility and ignitability properties of dust clouds that can be used to improve safety in industries that generate, process, use, or transport combustible dusts. The requirements for a dust explosion are: a combustible dust, dispersed in air, a concentration above the flammable limit, the presence of a sufficiently energetic ignition source, and some confinement. An explosion of a fuel in air involves the rapid oxidation of combustible material, leading to a rapid increase in temperature and pressure. The violence of an explosion is related to the rate of energy release due to chemical reactions relative to the degree of confinement and heat losses. The combustion properties of a dust depend on its chemical and physical characteristics, especially its particle size distribution. In this paper, the explosion characteristics of combustible dusts will be compared and contrasted with those of flammable gases, using methane as an example. These characteristics include minimum explosible concentration, maximum explosion pressure, maximum rate of pressure rise, limiting oxygen concentration, ignition temperature, and amount of inert dust necessary to prevent flame propagation. The parameters considered include the effects of dust volatility, dust particle size, turbulence, initial pressure, initial temperature, and oxygen concentration. Both carbonaceous and metal dusts will be used as examples. The goal of this research is to better understand the fundamental aspects of dust explosions.

306 citations

Journal ArticleDOI
TL;DR: In this article, the authors evaluated explosion severity parameters using a 20-L spherical vessel and numerical simulation by the program FLUENT to reveal the explosion mechanism of coal dusts.

170 citations

Journal ArticleDOI
TL;DR: In this paper, the authors discuss influences of these factors on the ignition sensitivity and explosion violence of dust clouds, and the consequences of the mentioned factors in design of mitigatory measures such as explosion isolation, explosion venting, and automatic explosion suppression, are discussed.
Abstract: Dust explosions in the process industries practically always start inside process equipment such as mills, dryers, mixers, classifiers, conveyors, and storage silos and hoppers. For any given dust type the ease with which dust clouds ignite and the rates with which they burn, vary considerably with factors well known in powder science and technology. The key factors include the primary particle size distribution of the dust, the degree of de-agglomeration of the dust particles in the cloud, the dust concentration distribution in the cloud, and the cloud turbulence. The last three factors are entirely dependent on the actual process situation in which the dust cloud is generated and sustained. The paper first discusses influences of these factors on the ignition sensitivity and explosion violence of dust clouds. Secondly, the concept of inherently safer process design to prevent accidental dust explosions is discussed, using design of hoppers and silos as an example. Then some consequences of the mentioned factors in design of mitigatory measures such as explosion isolation, explosion venting, and automatic explosion suppression, are discussed. The role of powder science and technology in understanding development and propagation of secondary dust explosions is also considered.

164 citations

Journal ArticleDOI
TL;DR: A review of the use of inert dusts to reduce the risk of dust explosions through both prevention and mitigation schemes is presented in this paper, with appropriate reference to the work of other researchers.
Abstract: This paper is a review of the use of inert dusts to reduce the risk of dust explosions through both prevention and mitigation schemes. The review is conducted by referring primarily to the research results of the author and his colleagues in this area, with appropriate reference to the work of other researchers. A functional distinction is first made between inerting and suppression by explaining each term within the contexts of explosion prevention and explosion mitigation, respectively. The use of solid inertants is then described in terms of the various inhibitor and situation-specific parameters that can influence their effectiveness. Finally, application examples of the research results are given for research laboratories, test facilities, design engineers, and industrial practitioners.

161 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202354
2022122
202168
202076
201993
201867