Dust emission in powder handling: Free falling particle plume characterisation

Renaud Ansart (1) , Alain de Ryck (1) , John A. Dodds (1)

1 RAPSODEE - Centre de recherche d'Albi en génie des procédés des solides divisés, de l'énergie et de l'environnement

Dust generation during solids handling, principally from the free falling of bulk materials and their impact on stockpiles, can be a health threat for operators and a cause of dust explosions. The proper design of a dust emission control system requires knowledge of the behaviour of the free falling jet, in particular the amount of air entrained by the falling powder and the concentration of dust liberated. The focus in this present paper is on the effect of drop height of a free falling jet on segregation by particle size, particle velocity, changes in particle concentration and entrained air in the dust plume. This gives a quantification of the important parameters and the concentration of dust emitted during a free fall.

Mots clés: Plume characterisation; Dust emission; Particle size; Dust concentration; Particle velocity

Domaines: Mécanique des fluides [physics.class-ph]; Mécanique des fluides [physics.class-ph]; Génie des procédés

Renaud Ansart, Alain de Ryck, John A. Dodds. Dust emission in powder handling: Free falling particle plume characterisation. Chemical Engineering Journal, 2009, vol. 152, pp. 415-420. ⟨10.1016/j.cej.2009.04.070⟩. ⟨hal-00744704⟩