Patent ID: 7198660
Filing Date: 2007-04-03
Classification: B01J,B03C,Y02A

Abstract:
1. An ionic emission electrostatic device ( 1 ) for depositing on the surface (sp) of a multitude of aerosol particles (p 1 , p 2 , pn) within a fluid (F), of the same class of diameter (dp), a quasi-homogeneous quantity of ions (i q ) of a charge (q), said electrostatic device ( 1 ) comprising: a) a conductive discharge corona electrode (EC), subjected to an electric discharge potential (V b) a non-corona conductive receptor electrode (ER), subjected to an electric receptor potential (V exhibiting a pseudo-planar active face (SA), located opposite the corona electrode (EC) and at a distance (di) from the discharge zone (D), and whose free space (H) separating the active face (SA) from the corona electrode (EC) is free, c) a multitude of through channels of fluid (C passing through the receptor electrode (ER), terminating in a multitude of orifices (O ensuring, in the vicinity of the active face (SA), a flow of fluid (F) according to veins passing through the receptor electrode (ER) and overall substantially parallel to the axis (xx′) of flow (K) of fluid (F), d) means ( e) a source of electric current ( f) at least two conductors ( each connected at one end ( to subject the two electrodes (EC, ER) to a difference in electric potential (V said ionic emission electrostatic device ( on the one hand, the pseudo-planar active face (SA) of its receptor electrode (ER) is covered by a quasi-uniformly distributed plurality of craters ( exhibiting on their end edges (Al) a section of minimum bend radius (ra), enclosing the orifices (O and terminating towards the outside of the active face (SA), according to a substantially perpendicular axis (xx′), in the direction of the discharge zone (D), on the other hand these craters ( so as to establish a surface flow (Is (r)) of ions (i the corresponding projection point (P(r)) of the active face (SA) of the receptor electrode (ER), and the main ionic action zone (A) surrounding the geometric centre ( in a wide effective zone (S) surrounding the geometric centre (O); such that in this effective zone (S) a quasi uniform quantity of ions (i