Wet electrostatic Ionising step in an electrostatic deposition device

US7517394B2 · kind B2 · utility

Assignee

• Forschungszentrum Karlsruhe GmbH · DE

Inventors

• Andrei Bologa · Blankenloch, DE
• Thomas Waescher · Heidelberg, DE
• Hanns-Rudolf Paur · Karlsruhe, DE
• Ralf Arheidt · Karlsruhe, DE

Key dates

• Filing date: Mar 11, 2006
• Grant date: Apr 14, 2009
• Expiry date: Mar 11, 2026

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S55/38
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A wet electrostatic ionization stage in an electrostatic separation device for purifying a flowing aerosal including finely dispersed particles entrained in a gas. The wet electrostatic ionization stage includes a plate disposed across a cross section of a flow channel and connected to a ground potential or reference counterpotential. The plate includes substantially identical openings through which the gas flows. The wet electrostatic ionization stage also includes a high-voltage grid disposed across the cross section of the flow channel either upstream or downstream from the plate and electrically isolated from a wall of the flow channel. The high voltage grid is coupled to a high voltage potential via a bushing disposed in the wall of the flow channel. For each opening in the plate, a rod-shaped high-voltage electrode coupled at one end to the high-voltage grid has a free end projecting centrically into the one opening. Each electrode includes a disk of electrically conductive material disposed on its free end. The disks are disposed in a substantially identical manner, each parallel to the plate, centrically with its corresponding opening and free from contact with the plate. T…