Explosibilty Characterization of Combustible Dusts from Italian Industries
| Autor: | Marmo L., Di Benedetto A., R. Sanchirico, Di Sarli V., Danzi E. |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | ECCE12, The 12th EUROPEAN CONGRESS OF CHEMICAL ENGINEERING, Florence (IT), 15-19/09/2019 info:cnr-pdr/source/autori:Marmo L., Di Benedetto A., R. Sanchirico, Di Sarli V., Danzi E./congresso_nome:ECCE12, The 12th EUROPEAN CONGRESS OF CHEMICAL ENGINEERING/congresso_luogo:Florence (IT)/congresso_data:15-19%2F09%2F2019/anno:2019/pagina_da:/pagina_a:/intervallo_pagine |
| Popis: | The first documented dust explosion in the world is that occurred in Turin (Italy) in 1785. Many years have passed since then, but dust explosion phenomena are still being investigated as they pose several open issues. Literature studies have been mostly focused on how to deal and protect industrial equipment, where fine solid particles are involved, both as processing powder and as waste material to be disposed. Powdered materials could also be produced accidentally, due to mechanical or thermal stress, such as working operations aiming to refine or reduce shape of raw materials, but also when brittle solid materials are handled or stored. Most of the dusts generated by these operations are heterogeneous in shape and particle size distribution, as well as in volatile content and chemical composition. Testing combustible dusts coming from industries means to deal with samples which are mostly not pure, but mixture of combustible and inert materials. The assessment of the likeliness of a combustible dust to explode in certain conditions is not an easy task, even though several standards could be used to determine the explosive properties, such as the recent ISO 80079-20-2:2016. Nevertheless, dust explosion hazard is based on the known "pentagon", a side of which represents the dispersibility of the material that often plays a critical role. Non-spherical dusts, such as fibers, scraps or shavings from finishing operations are difficult to disperse with traditional testing procedures, but this could not a priori exclude their unsafe behavior in industrial equipment, or in peculiar conditions: dispersibility dynamics of such type of dusts is not well understood. This paper summarizes results and draw conclusions obtained from the testing of over two hundred of dust samples, collected in industrial facilities from all over Italy, deriving from different type of processes, with different chemical nature and morphology. |
| Databáze: | OpenAIRE |
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