Consequence Modelling of Dust Explosion

Consequence Modelling of Dust Explosion

N.A. Rahman M.S. Takriff 

Department of Chemical and Process Engineering, Universiti Kebangsaan Malaysia, Malaysia

Page: 
212-219
|
DOI: 
https://doi.org/10.2495/SAFE-V3-N3-212-219
Received: 
N/A
| |
Accepted: 
N/A
| | Citation

OPEN ACCESS

Abstract: 

Dust explosion is a serious hazard in process industries where combustible dust is handled. Dust explo-sion commonly occurs in a confined space such as a silo, a vessel or a warehouse. Based on industrial accidents involving dust explosion, it may cause fatality, injury and property damage. Therefore, a practical approach for integrated risk management of dust explosion hazards is required. This research focuses on the development of a spreadsheet tool for predicting the severity of dust explosion. The consequence modelling is required to enable the assessment of risk associated with dust explosion. Various published models were studied for initial work of consequence modelling. Parameters con-sidered were the dust deflagration index (Kst), the maximum explosion pressure (Pmax), the maximum rate of pressure rise (dP/dt)max and the laminar burning velocity (Slbv). Reliable value for these dust explosion parameters has been tabulated based on closed vessel laboratory tests. A case study of dust explosion involving maize starch in closed vessel was used to test and validate the developed conse-quence modelling tool. The modelling result was discussed by comparing the predicted value against experimental value. The spreadsheet tool that was developed in this work can be used for the purpose of risk management of a facility associated with dust explosion hazards. It can be used to assist the application to combustion suppressant agent and design of explosion venting to prevent and mitigate the consequence of dust explosion.

Keywords: 

Consequence modelling, dust explosion, risk assessment

  References

[1] Combustible Dust in Industry: Preventing and Mitigating the Effects of Fire and Explosions; Safety and Health Information Bulletin, SHIB 07-31-2005, available at www.osha.gov/dts/shib/shib073105.html

[2] Combustible Dust Explosion; Department of Occupational Safety and Health, Min-istry of Human Resources, Malaysia, available at http://www.dosh.gov.my/index. php?option=com_content&view=article&id=103:combustible-dust-explosion&catid= 440&Itemid=1127&lang=en

[3] Combustible Dust Explosion at Motorcycle Rim Manufactured Factory; Department of Occupational Safety and Health, Ministry of Human Resources, Malaysia, available at http://www.dosh.gov.my/index.php?option=com_content&view=article&id=295:co mbustible-dust-explosion-at-motorcycle-rim-manufactured-factory&catid=439&Itemi d=1126&lang=en

[4] Dahoe, A.E., Zevenbergen, J.F., Lemkowitz, S.M. & Scarlett, B., Dust explosions in spherical vessels: The role of flame thickness in the validity of the ‘cube-root law’. Journal of Loss Prevention in the Process Industries, 9(1), pp. 33–44, 1996. doi: http:// dx.doi.org/10.1016/0950-4230(95)00054-2

[5] Di Benedetto, A. & Russo, P., Thermo-kinetic modelling of dust explosions. Journal of Loss Prevention in the Process Industries, 20, pp. 303–309, 2007. doi: ttp://dx.doi.org/ 10.1016/j.jlp.2007.04.001

[6] Eckhoff, R.K., Dust Explosions in the Process Industries, 3rd edn., Gulf Professional Publishing: Houston, Texas, USA, 2003.

[7] Crowl, D.A. & Louvar, J.F., Chemical Process Safety - Fundamentals with Applica-tions, 2nd edn., Prentice-Hall, 2002.

[8] Nagy, J. & Verakis, H.C., Development and Control of Dust Explosions, Marcel Dekker, Inc.: New York, 1983.

[9] Namura, S.I. & Tanaka, T., Prediction of maximum rate of pressure rise due to dust explosion in closed spherical and non-spherical vessels. Industrial Engineering Chemi-cal Process Design and Development, 19, pp. 451–459, 1980. doi: http://dx.doi.org/ 10.1021/i260075a021

[10] Nagy, J., Seiler, E.C. & Conn, J.W., Explosions Development in Closed Vessel. Report Inv. No. 7507. U.S. Bureau of Mines: Washington, DC, 1971.

[11] Silvestrinia, M., Genovaa, B. & Leon Trujillo, F.J., Correlations for flame speed and ex-plosion overpressure of dust clouds inside industrial enclosures. Journal of Loss Preven-tion in the Process Industries, 21, pp. 374–392, 2008. doi: http://dx.doi.org/10.1016/j. jlp.2008.01.004

[12] GESTIS-DUST-EX Database, Combustion and Explosion Characteristics of Dusts, available at http://dguv.de/ifa/Gefahrstoffdatenbanken/GESTIS-STAUB-EX/index-2.jsp