Autoselective regenerating particulate filter
AssigneePerkins Engine Company Limited
InventorsColin Peter Garner, John Ernest Harry
Life of this patent
Estimating the term…
Abstract
The present disclosure provides an apparatus and method for removing particulates from a gas stream. The apparatus includes a ceramic filter, at least one electrode, and at least one conductor. The electrode is located at an end of the filter and produces an atmospheric glow discharge in order to oxidize carbon deposits trapped in the filter. The conductor extends at least partially into the filter and acts as a counter electrode. Through various arrangements of the electrodes and conductors, the present disclosure provides closer connection between the trapped carbon deposits and the electrodes. This improves the regeneration of the filter without increasing the size and/or weight of the apparatus.
Claims21
An apparatus for removing particulates from a gas stream, the apparatus comprising:
- a ceramic filter through which gas may be caused to flow, the filter having a first end and a second end and including a plurality of elongate cells extending substantially parallel to the direction of gas flow, each elongate cell of the filter being closed either the first or second end of the filter by an end plug;
- at least one electrode located at the first end of the filter for producing an atmospheric glow discharge;
- and
- at least one conductor spaced away from the at least one electrode and configured to lead current from the electrode out of the filter, the at least one conductor comprising a portion of the filter including a conductive material;
- wherein the portion of the filter including the conductive material extends at least partially into the filter from an end face of the filter past at least one of the end plugs.
An apparatus for removing particulates from a gas stream, the apparatus comprising:
- a ceramic filter through which gas may be caused to flow, the filter having a first end and a second end and including a plurality of elongate cells extending substantially parallel to the direction of gas flow;
- at least one electrode located at the first end of the filter for producing an atmospheric glow discharge;
- and
- at least one conductor spaced away from the at least one electrode and configured to lead current from the electrode out of the filter,
- wherein the apparatus is mounted within a filter housing, the housing being provided with apertures for the ingress and egress of gas, and wherein the at least one conductor includes a portion of the housing extending along at least a majority of a length of the filter extending between the first and second ends.
A method of removal of particulates from a gas stream, the method comprising:
- causing the gas to flow through a ceramic filter so that particulates are separated from the gas flow and trapped by the filter, wherein the filter includes a plurality of elongate cells extending substantially parallel to the direction of gas flow;
- positioning a plurality of electrodes at a first end of the filter;
- positioning a plurality of conductors at the first end of the filter and spaced away from the electrode, the plurality of conductors extending at least partially into the filter, the plurality of electrodes or the plurality of conductors arranged to form a linear arrangement in adjacent cells;
- generating an atmospheric glow discharge from the plurality of electrodes;
- and
- leading current from the plurality of electrodes out of the filter through the plurality of conductors.
Dependencies are inferred from the claim text.