Using a Burning Rate Model for Deflagration Vent Sizing

NFPA 68 provides simplified calculation methods for sizing deflagration vents for combustible dust explosions. These simplified methods apply to a limited set of process parameters and equipment. For applications outside those limitations, full-scale testing or a performance based approach is needed. This paper presents a methodology for using burning rate models to predict explosion behavior in enclosed vessels. Measured KSt values are used to determine an estimate of the burning rate. Once the burning rate of a material is known, application to various process parameters and equipment can be made using dynamic simulation. Predicted burning rates for one material will be presented.

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