PARTICLE TRAJECTORIES IN A PLATE - PLATE ELECTROSTATIC PRECIPITATOR WITH HORIZONTAL IONIZING BLADES

摘要

The trajectories of fine particles (≤ a few μm) in an electrostatic precipitator (ESP) are modelled taking into account the secondary gas flow induced by horizontal ionizing electrodes. In particular, in an electrostatic precipitator with horizontal ionizing blades, the secondary flow in the form of axial rolls can be vigorous and the resultant gas flow inside the precipitator can be considered as axially invariant to a first approximation. A numerical simulation of charging, transport and collection of fine particles is presented, based on the approximation of a gas flow independent of the axial variable. The bi-dimensional character of the distributions of electric field E and ionic space charge q which plays an important role in the charging of particles is taken into account. This allows simulating the particles trajectories and the dynamics of their charging.