Patent ID: 8337600
Filing Date: 2012-12-25
Classification: B03C

Abstract:
1. An electrostatic precipitator for removing solid and liquid components from an aerosol, comprising: a precipitator housing having a raw gas inlet for an aerosol to be cleaned, a clean gas outlet for cleaned aerosol, and at least one aerosol supply channel flange-mounted to the raw gas inlet; a drain device for solid and liquid components that are separated from the aerosol; an ionization stage externally powered via a high-voltage bushing and including at least one metallic high-voltage rod that extends into a flow path of the aerosol and to which high voltage is applyable; and a collector stage disposed in the flow path downstream of the ionization stage; wherein: the at least one high-voltage rod extends into the gas flow path from a high-voltage insulator disposed outside the flow path in a pot-shaped insulator housing that is not traversed by the aerosol, the insulator housing connected to an electrical reference potential; the high-voltage rod has a high-voltage electrode disposed at a free end of the high-voltage rod and a protective electrode disposed at a distance d from an opening to the insulator housing, the high-voltage and protective electrodes being disk-shaped and including radially oriented tips uniformly distributed around their circumference; the high-voltage rod extends coaxially into a grid or wire mesh electrode comprising a hollow-cylindrical sleeve having perforated sheet metal or a wire mesh, the grid or wire mesh electrode being connected to a reference potential and attached at one end thereof to a bottom plate of the insulator housing so as to form a concentric gap having a minimum width H between each of the high-voltage and protective electrodes and the grid or wire mesh electrode; the grid or wire mesh electrode at least one of abutting and being received in a perforated nozzle plate, the perforated nozzle plate being at the electrical reference potential; and the grid or wire mesh electrode is circumferentially surrounded by a porous collector over a length not exceeding a length of the hollow-cylindrical sleeve, the aerosol flowing through the porous collector.