Perkins Engines Company Limited

Loughborough Consultants Limited

John Ernest Harry

Colin Peter Garner

Karim Ladha

David William Hoare

Jonathan Graham Peel Binner

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.

Autoselective regenerating particulate filter

An apparatus for removing particulates from a gas stream is described comprising a filter through which gas may be caused to flow, at least one first electrode for producing an atmospheric glow discharge located near to but spaced apart from the filter, and at least one second counter electrode, the electrodes being connected to an AC voltage supply generating an AC voltage in a frequency within the range of 1 kHz to 200 kHz. A method of removal of particulates from a gas stream comprising causing the gas to flow through such an apparatus is also described.

An electric discharge apparatus, for example a gas laser or discharge lamp, includes first and second electrodes defining a first discharge path and third and fourth electrodes defining a second discharge path alongside the first. A respective impedance is associated with any electrical connection between electrodes. The electrodes are electrically arranged such that either the current flow of a discharge along the first path is so different from the current flow of a discharge along the second path that, overall, the discharges repel one another, or stable electric discharges which coalesce are generated between respective electrodes of the first and second sets. A multi-electrode plasma torch is also provided comprising an electrode holder from which a plurality of electrodes project and a pilot electrode common to more than one of the electrodes.

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Oakham, United Kingdom

John Ernest Harry