Electric filter with movable belt electrode
First Claim
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1. A method for removing contaminants from an air stream, comprising:
- providing an electric filter characterized by a movable, endless, perforated belt electrode having a plurality of pleats arranged generally longitudinally with respect to the flow of a gas stream, a grounded electrode adapted to fit in a closely-mated, spaced-apart relationship with said belt electrode, and a filter medium sandwiched between and engaged with said electrodes;
polarizing said filter medium by forming an electric field between said electrodes;
passing an air stream through said electric filter in a direction generally longitudinal with respect to said pleats; and
collecting contaminants dispersed throughout said air stream on said filter medium.
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Abstract
A method and apparatus for removing airborne contaminants entrained in a gas or airstream includes an electric filter characterized by a movable endless belt electrode, a grounded electrode, and a filter medium sandwiched therebetween. Inclusion of the movable, endless belt electrode provides the driving force for advancing the filter medium through the filter, and reduces frictional drag on the filter medium, thereby permitting a wide choice of filter medium materials. Additionally, the belt electrode includes a plurality of pleats in order to provide maximum surface area on which to collect airborne contaminants.
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Citations
10 Claims
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1. A method for removing contaminants from an air stream, comprising:
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providing an electric filter characterized by a movable, endless, perforated belt electrode having a plurality of pleats arranged generally longitudinally with respect to the flow of a gas stream, a grounded electrode adapted to fit in a closely-mated, spaced-apart relationship with said belt electrode, and a filter medium sandwiched between and engaged with said electrodes; polarizing said filter medium by forming an electric field between said electrodes; passing an air stream through said electric filter in a direction generally longitudinal with respect to said pleats; and collecting contaminants dispersed throughout said air stream on said filter medium. - View Dependent Claims (2, 3)
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4. An electric filter, comprising:
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a movable, endless, perforated belt electrode, having a plurality of pleats arranged generally longitudinally with respect to the flow of a gas stream to be purified; a grounded electrode adapted to fit in a closely-mated, spaced-apart relationship with said belt electrode along said pleats, said grounded electrode including a plurality of perforations to permit the flow of a gas stream therethrough; a filter medium sandwiched between and engaged with said electrodes, advanced and movable therein by the movement of said belt electrode; means for supplying voltage to said belt electrode; and means connected to said belt electrode, providing power to advance said belt electrode and filter medium. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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Specification