Method and device for precipitating impurities from a stream of gas

US8308846B2 · kind B2 · utility

Assignee

• WOCO Industrietechnik GmbH · DE

Inventors

• Marcel Op de Laak · Glückstadt, DE
• Franz Knopf · Bühl, DE

Key dates

• Filing date: May 10, 2008
• Grant date: Nov 13, 2012
• Expiry date: May 25, 2029

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B03C2201/30
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Liquid and/or particle-shaped impurities are precipitated from a stream of gas, for example, from a stream of gas that originates from a crankcase of an internal combustion engine and is directed to the engine's intake side. The stream of gas is passed through a gas discharge section between two electrodes. The stream of gas is passed between an emission electrode which is formed by electrode tips and an opposing electrode at a distance therefrom. A direct voltage which exceeds the breakdown voltage is applied to the electrodes using a direct current high voltage source, and the current which occurs over the gas discharge section between the electrodes is limited. A stable low energy direct current plasma is formed in the space between the two electrodes. The impurities are electrically charged and attracted to the opposing electrode by means of electrical field forces.