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US 5,288,305 AGranted
Method for charging particles
AssigneeAsea Brown Boveri AG
InventorsBernd Gellert, Andreas Kwetkus
Life of this patent
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Abstract
In order to enhance the efficiency of charging in a friction charger, it is proposed to precharge the particles before the first collision with the walls by making use of the photoeffect. This is performed, preferably, through irradiating the particles using UV radiation from a UV excimer radiator.
Claims4
A method for charging particles included in a gas comprising the steps of:
- (a) precharging said particles using ultraviolet radiation which is irradiated at said gas containing said particles when said gas is caused to flow through a UV radiation device;
- (b) performing additional charging of said particles included in said gas using a friction charging chamber, subsequent to said precharging of said particles using ultraviolet radiation;
- and
- (c) separating said charged particles from uncharged particles within said gas and depositing said separated charged particles onto an electrode of opposite polarity from said charged particles subsequent to said additional charging of said particles in said friction charging chamber.
1 more element
Dependencies are inferred from the claim text.