Study of two-stage-type electrostatic precipitator in axisymmetric configuration applied to finely ground lignocellulosic materials

The main objective of this paper is to develop a novel two-stage-type electrostatic precipitator to collect finely ground lignocellulosic particles. To prevent the danger of explosion of such a powdery material, ion generation and particle charging processes are separated. Main results show that the particles can be highly charged in a two-coaxial cylinders triode-type device, which also facilitates their collection. For instance, the collection efficiency reaches 92 % for particle size of about 0.3 mu m, and exceeds 99% for particle size greater than 2 mu m.