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Vapor purification with self-cleaning filter

United States Patent

6,660,061
December 9, 2003
View the Complete Patent at the US Patent & Trademark Office
Pacific Northwest National Laboratory - Visit the Technology Commercialization Program Website
A vapor filtration device including a first electrode, a second electrode, and a filter between the first and second electrodes is disclosed. The filter is formed of dielectric material and the device is operated by applying a first electric potential between the electrodes to polarize the dielectric material such that upon passing a vapor stream through the filter, particles from the vapor stream are deposited onto the filter. After depositing the particles a second higher voltage is applied between the electrodes to form a nonthermal plasma around the filter to vaporize the collected particles thereby cleaning the filter. The filter can be a packed bed or serpentine filter mat, and an optional upstream corona wire can be utilized to charge airborne particles prior to their deposition on the filter.
Josephson; Gary B. (Richland, WA), Heath; William O. (Richland, WA), Aardahl; Christopher L. (Richland, WA)
Battelle Memorial Institute (Richland, WA)
10/ 013,010
20030079982
October 26, 2001
This invention was made with Government support under Contract Number DEAC0676RL01830 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.