Electrical enhancement of fabric filter performance
AssigneeGeneral Electric Company
InventorRobert W. Taylor
Life of this patent
Estimating the term…
Abstract
A method for operating a filter assembly having a filter medium includes applying a constant or nearly constant static DC potential to dust entering the filter assembly and the filter medium, passing dust-laden gas through the filter medium in a first direction through the filter assembly while the filter medium is statically charged with the DC potential, measuring pressure drop through the filter assembly, and, in response to the pressure drop meeting a preset limit, reversing the polarity of the DC potential to thereby allow dust particles on the filter medium to drop off the filter medium.
Claims19
A method for operating a filter assembly having a cloth fabric filter medium, said method comprising:
- applying a constant or nearly constant static DC potential to dust entering the filter assembly and to the filter medium;
- passing dust-laden gas through the filter medium in a first direction through the filter assembly while the filter medium is statically charged with the DC potential;
- measuring pressure drop through the filter assembly;
- and
- in response to the pressure drop meeting a preset limit, reversing the polarity of the DC potential to thereby allow dust particles on the filter medium to drop off the filter medium.
A filter apparatus comprising:
- a cloth fabric filter medium configured to pass dust-laden gas therethrough in a first direction while the cloth fabric filter medium is statically charged with a constant or nearly constant DC potential;
- a pressure drop measuring apparatus configured to measure a pressure drop during operation of the filter apparatus;
- and
- a DC source configured to apply the DC potential to the cloth fabric filter medium and responsive to the pressure drop measuring apparatus to reverse the polarity of the DC potential to thereby allow dust particles on the cloth fabric filter medium to drop off the cloth fabric filter medium when the pressure drop meets or exceeds a preset limit.
Dependencies are inferred from the claim text.