Explosion Protection with Metal Dust Fuels: New Experimental Evidence

Taveau, Jérôme; Vingerhoets, J.W.A.; Snoeys, Jef; Going, John E.; Farrell, Thomas M.

doi:10.3850/978-981-07-5936-0_13-05

Cited by 4 publications

(5 citation statements)

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“…Pressure spikes up to 40 barg were measured just upstream of the closed valve, but did not damage it. (Taveau et al, 2013) The most recent large scale tests involving a 5-m 3 vented vessel (for a P red up to 0.9 barg) connected to a DN400 pipe and conducted with aluminum dust (K St = 450 bar.m/s, P max = 10.1 barg) were also successful ( Figure 14).…”

Section: Explosion Isolationmentioning

confidence: 96%

“…Published experiments of vented aluminum dust deflagrations, for volumes of 2.6 m 3 and 18.5 m 3 , have led to much higher reduced pressures than predicted by venting equations (Taveau et al, 2013;Taveau, 2013;Taveau, 2014).…”

Section: Explosion Ventingmentioning

confidence: 99%

“…This combination of chemical and mechanical isolation techniques was therefore proven to be a method to safely isolate a metal dust explosion without release of flame or combustion products. Further tests (Taveau et al, 2013) have been performed with aluminum dust (K St = 680 bar.m/s, P max = 11.6 barg) using a new version of the gate valve (with a stronger design and better sealing capabilities at high temperatures) first on a DN 150 pipe connected to a 1-m 3 contained vessel ( Figure 13). The valve was able to stop the explosion both for ignition near the pipe and ignition at the vessel center, without chemical isolation.…”

Section: Explosion Isolationmentioning

confidence: 99%

See 2 more Smart Citations

Explosion hazards of aluminum finishing operations

Taveau

Hochgreb

Lemkowitz

et al. 2018

Journal of Loss Prevention in the Process Industries

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Metal dust deflagrations have become increasingly common in recent years. They are also more devastating than deflagrations involving organic materials, owing to metals' higher heat of combustion, rate of pressure rise, explosion pressure and flame temperature. Aluminum finishing operations offer a particularly significant hazard from the very small and reactive aluminum particles generated, and thus require high attention to details of operation and explosion safety management. This paper presents available statistics on metal dust explosions and studies the specific explosion hazards of aluminum finishing operations. The analysis of seven case studies shows that the proper design, monitoring and maintenance of dust collection systems are particularly important. Furthermore, the isolation of deflagrations occurring in dust collection systems, as well as good housekeeping practices in buildings, are critical safeguards to avoid the occurrence of catastrophic secondary explosions.

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Section: Explosion Isolationmentioning

confidence: 96%

Section: Explosion Ventingmentioning

confidence: 99%

Section: Explosion Isolationmentioning

confidence: 99%

See 1 more Smart Citation

Explosion hazards of aluminum finishing operations

Taveau

Hochgreb

Lemkowitz

et al. 2018

Journal of Loss Prevention in the Process Industries

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“…Bulk material flow limitations such as inverse velocity at specific throw distances, discharge velocity, and injection profile will also exhibit an appreciable influence on system performance and the ability of the agent to suppress deflagrations at higher fuel concentrations. 15,16 Aside from this work, PK has not been investigated as extensively as SBC from an explosion inhibition standpoint; however, it does demonstrate adequate inerting performance when employed as a fire suppressant. 17 2.2.…”

Section: Inerting and Mitigation Studies On Keymentioning

confidence: 99%

Characterization of Thermal Stability and Heat Absorption for Suppressant Agent/Combustible Dust Mixtures via Thermogravimetric Analysis/Differential Scanning Calorimetry

Reding

Shiflett

2019

Ind. Eng. Chem. Res.

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Combustible dusts continue to present a critical threat toward personnel and process equipment in a wide variety of bulk solids processing industries. The addition of noncombustible inert material to combustible dust mixtures, either through premixing or high-rate injection as the flame front begins to develop, is common practice for preventative inhibition or explosion protection via active suppression, respectively. Metal dusts in particular present an extremely reactive explosion risk due to amplified heat of combustion, burning temperature, flame speed, explosibility parameters (K St and P max ), and ignition sensitivity. Establishment of proper prevention and mitigation designs for metal fuel deflagrations has posed challenging. The aim of this paper is to propose a method for the characterization of the inhibition efficiency of five suppressant agents (sodium bicarbonate [SBC], potassium bicarbonate [PK], monoammonium phosphate [MAP], diammonium phosphate [DAP], and sodium chloride-based [Met-L-X]) when mixed with both organic (cornstarch) and metallic (zinc) fuels. For each 1:1 wt % fuel/agent mixture, thermal stability and heat absorption have been evaluated using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC).

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“…This paper provides an overview of past (Going and Snoeys, 2002) and more recent (Taveau et al, 2013) suppression tests with metal dusts. Parameters such as explosibility characteristics (K St , P max ), dust concentration, vessel volume, suppressant type/ concentration, number and size of containers, and detector activation pressure were varied to determine their influence on suppression effectiveness.…”

Section: Introductionmentioning

confidence: 99%