EP1700515B1 - Elektrode zum erzeugen eines dielektrische-barriere-entladungsplasmas - Google Patents

Elektrode zum erzeugen eines dielektrische-barriere-entladungsplasmas Download PDF

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Publication number
EP1700515B1
EP1700515B1 EP04816469A EP04816469A EP1700515B1 EP 1700515 B1 EP1700515 B1 EP 1700515B1 EP 04816469 A EP04816469 A EP 04816469A EP 04816469 A EP04816469 A EP 04816469A EP 1700515 B1 EP1700515 B1 EP 1700515B1
Authority
EP
European Patent Office
Prior art keywords
support
conductive wire
opening
electrode
sheathed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP04816469A
Other languages
English (en)
French (fr)
Other versions
EP1700515A2 (de
Inventor
Cécile AYRAULT
Jean-Michel Tatibouet
Stéphane PASQUIERS
Cyrille Bertrand
Emmanuel Philibert
Jean-Paul Chevrier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FagorBrandt SAS
Original Assignee
Brandt Industries SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Brandt Industries SAS filed Critical Brandt Industries SAS
Publication of EP1700515A2 publication Critical patent/EP1700515A2/de
Application granted granted Critical
Publication of EP1700515B1 publication Critical patent/EP1700515B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/2406—Generating plasma using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/2406—Generating plasma using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes
    • H05H1/2418—Generating plasma using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes the electrodes being embedded in the dielectric

Definitions

  • the present invention relates to an electrode for the generation of dielectric barrier discharge plasma.
  • the present invention relates to the treatment of a gas stream by means of a dielectric barrier discharge (DBD or Dielectric Barrier Discharge) plasma.
  • DBD dielectric Barrier Discharge
  • the electrodes are generally made of metal plates arranged in parallel and between which a dielectric barrier discharge plasma is generated.
  • a non-conductive material is interposed between the electrodes to form the dielectric barrier.
  • the gas flow to pass through the plasma can also pass through the electrodes.
  • the electrodes are then arranged transversely to the gas flow.
  • Perforated plates forming electrodes are thus known, arranged facing one another so that the plasma is generated between these electrodes and that the gaseous flow can pass through these same electrodes thanks to the perforations.
  • a perforated dielectric material is also added transversely to the gas flow to obtain the dielectric barrier discharge plasma.
  • Electrodes of this type are disclosed for example in the document US-2002/015 3241 A1 .
  • the present invention aims to solve the aforementioned drawbacks and to propose a new type of electrode for complete isolation of the electrode and thus eliminating any risk of generating arcing.
  • the present invention relates in a first aspect to an electrode for generating a dielectric barrier discharge plasma comprising a portion of electrically conductive wire coated with a sheath of dielectric material fixed on a support.
  • the holder has an opening, the portion of sheathed conductive wire extending through the opening.
  • the electrode is entirely coated with a dielectric material. No preferential path can thus exist between the electrodes whatever the geometry used.
  • easily manipulable electrodes are available which can be fixed in a plasma generating device, the supports of the electrodes being arranged opposite one another in order to form plasma generation zones therebetween.
  • Such an electrode can, thanks to its opening, be traversed by a gaseous flow to be treated by plasma, the portion of sheathed conducting wire extending through the opening making it possible to generate a plasma zone at the right of this opening.
  • the electrode comprises a support extending substantially in a plane, this support having an opening and the portion of sheathed conductive wire extending in the plane of the support through the opening .
  • the electrode is thus in the form of a substantially flat part.
  • the sheathed conductive wire portion forms several segments of sheathed conductive wire extending through the opening.
  • the homogeneity of the plasma is also ensured since the segments of sheathed conducting wire passing through the opening are spaced regularly from each other.
  • the electrode preferably comprises tensioning means adapted to exert a tensile force at two ends of the portion of sheathed conductive wire.
  • a dielectric barrier discharge plasma generator comprising at least two electrodes according to the invention, arranged facing one another.
  • a dielectric barrier discharge plasma generator is thus obtained in which the electrode is entirely coated with a dielectric material, thus avoiding any risk of arcing from one electrode to the other.
  • these electrodes respectively comprise openings arranged facing each other.
  • a dielectric barrier discharge plasma generator is thus obtained in which a gas stream to be treated by the plasma can pass through the electrodes.
  • the present invention also relates to a device for treating a gas stream comprising a dielectric barrier discharge plasma generator according to the invention, a catalytic support comprising means for passing a gas stream being disposed between said electrodes.
  • this electrode comprises a portion 10 of electrically conductive wire coated with a sheath of dielectric material.
  • This sheathed conductor wire comprises a core constituting an electrical conductor wire 11 surrounded by a sheath 12 of dielectric material.
  • the electrical conductor wire 11 is a single-core core.
  • the use of a multi-strand core, made from a twist of the strands, would have the effect of creating variations in distance between two electrodes placed next to each other. These variations in distance would affect the homogeneity of the plasma areas.
  • the sheath 12 of dielectric material may be made of any type of dielectric material adapted to be brought into contact with the elements present in the generated plasma.
  • Suitable dielectric materials for this type of plasma may be fluorocarbon coatings such as polytetrafluoroethylene (PTFE) sold under the trade mark Teflon or else silicone, or possibly a Teflon coating itself covered with a silicone layer.
  • PTFE polytetrafluoroethylene
  • the electrode comprises a support 13, the portion 10 of sheathed conducting wire being fixed on this support.
  • This support 13 may be made of resin filled with glass to ensure its mechanical rigidity.
  • the support 13 has an opening 14 and the portion 10 of sheathed conductive wire extends through this opening 14.
  • the support has a substantially square shape and has a circular opening 14 of diameter slightly smaller than the dimensions of the square support.
  • the portion 10 of sheathed conductive wire thus extends in the plane of the support, through the opening 14.
  • the sheathed conductor wire travels on the support by crossing the opening 14 multiple times in order to grind as much as possible the disc-shaped surface here, of this opening 14.
  • this portion 10 of sheathed conductive wire forms several segments of sheathed conductor wire which extend through the opening 14.
  • the sheathed conductor wire snakes, following a path back and forth between an edge 13a and an opposite edge 13b of the support 13.
  • the segments of sheathed conductor wire extending through the opening 14 are thus parallel, spaced regularly from each other.
  • portion 10 of sheathed conductive wire has its two ends 10a, 10b attached to the support 13 substantially adjacent.
  • the portion 10 of sheathed conductor wire runs in duplicate on the support 13.
  • the support 13 comprises routing grooves 15 of the sheathed conducting wire.
  • routing grooves 15 are made on the surface of the solid part of the support 13. These routing grooves 15 open out towards each other in the opening 14 so that the portion 10 of conducting wire sheathed is housed in these grooves 15 on either side of the opening 14 through which it passes.
  • these routing grooves 15 may comprise lugs 16 of various shapes intended in particular to hold the wire in the curved portions of the routing grooves 15.
  • This tension system 17 can be made from jaws whose adjustment of the tensile force exerted on the wire can for example be achieved by means of a screw. It may further comprise a compensation system, such as a spring, providing sufficient traction force even in case of possible elongation of the wire.
  • a compensation system such as a spring
  • this voltage system 17 comprises metal parts, the latter will preferably be connected to the core of the electrical conductor wire 11 they maintain in tension.
  • one of the jaws of the tensioning system 17 perforates the sheath 12 to put the metal assembly of the tensioning system 17 to the potential of the electric conductor wire 11.
  • the path of the portion 10 of sheathed conductive wire makes it possible to bring back its two ends 10a, 10b at the level of the tensioning system 17, avoiding any peak effect on the end of the wire which is no longer insulated.
  • the support 13 comprises two opening portions 14a, 14b separated by a cross member 18 on which segments of sheathed conductive wire may be attached.
  • the sheathed lead wire is in this example fixed by forming two sinusoidal curves on either side of the crosspiece 18, joined on the side of an edge 13c of the support 13, opposite the edge 13d carrying the two ends 10a, 10b of the sheathed conductor wire.
  • routing grooves can be made in the solid portions of the support 13 and a tensioning system can be fixed at the ends 10a, 10b of the sheathed conductive wire in order to exert traction and to keep the sheathed conductive wire taut. .
  • the generator of a dielectric barrier discharge plasma uses two electrodes as described above with reference to Figures 1A and 1B .
  • Electrodes 1, 1 ' are fixed against each other so that the faces of each support 13, 13', opposite to the faces carrying the portion 10 of sheathed conductive wire, are in contact one against the other. other.
  • a plasma zone can thus be generated at the openings 14 placed facing each other, between the portions 10, 10 'of sheathed conductive wire mounted facing each other.
  • the ends 10a, 10b and 10'a, 10'b of the portions 10, 10 'of sheathed conductor wire of each electrode 1, 1' are arranged at the opposite of each other in the assembly of the generator.
  • Electrodes 1, 1 ' are identical and fit one against the other, the supports 13, 13' being arranged at 180 ° relative to each other.
  • This type of generator is particularly well suited to the treatment of a gas flow passing through a plasma generated by the electrodes placed transversely to this flow.
  • the use of a sheathed conductor wire has the advantage of limiting the pressure drops during the transfer of the gas flow through these electrodes. Indeed, the useful section of the openings 14 for the passage of the gas stream is kept at the thickness of the conductor wire sheathed.
  • Such a generator of a dielectric barrier discharge plasma is particularly well suited to be mounted in a device for treating a gas flow as illustrated in FIG. figure 4 .
  • This device for treating a gas flow makes it possible in particular to treat cooking fumes in a domestic filter hood.
  • Such a device is in particular described in the patent application French N ° 0216778 whose contents are incorporated by reference in the present description.
  • a catalytic support 20 comprising means for passing a gas stream is disposed between two electrodes 1, 1 'according to the invention.
  • the catalytic support 20 may comprise channels (not shown) extending in the flow direction F of the gas flow.
  • this device for treating a gas flow can be adapted to equip a conduit 21 for circulating gases of traditionally cylindrical shape.
  • the opening 14, 14 'of each electrode 1, 1' has a passage surface corresponding to the transverse surface of the pipe 21.
  • each opening 14, 14 ' is traversed by a network of segments of sheathed conducting wire extending regularly in the plane of each electrode and also arranged remotely. regular electrode 1 to the other electrode 1 '.
  • the plasma is generated between the electrodes 1, 1 '; directly in the catalytic support 20.
  • a device for treating a gas stream by catalysis and plasma combined, relatively compact and simple to fix on a pipe 21 for circulation of a gas stream.
  • FIG. figure 4 several devices for treating a gas flow as illustrated in FIG. figure 4 can be successively mounted one behind the other in a cylindrical pipe for treating a gas flow.
  • an electrode made from a portion 10 of sheathed conductive wire could also be used on a solid support, having no opening for the passage of gas.
  • electrodes may be made with a sheathed conductor wire snaking on two opposite walls of a ceramic tube through which the plasma will be generated, the gases to be treated circulating inside the tube.
  • the electrodes are arranged in planes that are not transverse to the gas flow but instead parallel to this flow.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Plasma Technology (AREA)
  • Glass Compositions (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Gas-Filled Discharge Tubes (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)

Claims (10)

  1. Elektrode zur Erzeugung von Entladungsplasma mit dielektrischer Sperre, umfassend einen Teil (10) eines mit einer Hülle aus dielektrischem Material (12) bedeckten elektrischen Leitungsdrahts (11), der auf einem Träger (13) befestigt ist, dadurch gekennzeichnet, daß der Träger (13) eine Öffnung (14) aufweist, wobei sich der Teil (10) des umhüllten Leitungsdrahts über die Öffnung (14) erstreckt.
  2. Elektrode gemäß Anspruch 1, dadurch gekennzeichnet, daß sie einen Träger (13) umfaßt, der sich im wesentlichen in einer Ebene erstreckt, wobei der Träger (13) eine Öffnung (14) umfaßt und der Teil (10) des umhüllten Leitungsdrahts sich in der Ebene des Trägers (13) über die Öffnung (14) erstreckt.
  3. Elektrode gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Teil (10) des umhüllten Leitungsdrahts mehrere Segmente des umhüllten Leitungsdrahts bildet, die sich über die Öffnung (14) erstrecken.
  4. Elektrode gemäß Anspruch 3, dadurch gekennzeichnet, daß die genannten Segmente des umhüllten Leitungsdrahts, die die Öffnung (14) queren, in regelmäßigem Abstand zueinander sind.
  5. Elektrode gemäß einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Teil (10) des umhüllten Leitungsdrahts zwei im wesentlichen aneinander angrenzende Enden (10a, 10b) aufweist, die auf dem Träger (13) befestigt sind.
  6. Elektrode gemäß einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Träger (13) Führungskehlen (15) für den umhüllten Leitungsdraht aufweist.
  7. Elektrode gemäß einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß sie Spannungsmittel (17) aufweist, die geeignet sind, eine Zugkraft auf zwei Enden (10a, 10b) des Teils (10) des umhüllten Leitungsdrahts auszuüben.
  8. Generator zur Erzeugung eines Entladungsplasmas mit dielektrischer Sperre, dadurch gekennzeichnet, daß er mindestens zwei Elektroden (1, 1') gemäß einem der Ansprüche 1 bis 7 aufweist, die einander gegenüberliegend angeordnet sind.
  9. Generator gemäß Anspruch 8, dadurch gekennzeichnet, daß die Elektroden (1, 1') Öffnungen (14, 14') aufweisen, die jeweils einander gegenüberliegend angeordnet sind.
  10. Vorrichtung zum Aufbereiten eines Gasflusses, dadurch gekennzeichnet, daß sie einen Generator von Plasma gemäß Anspruch 8 oder 9 umfaßt, wobei ein katalytischer Träger (20), der Mittel zum Durchlassen eines Gasflusses umfaßt, zwischen den Elektroden (1, 1') angeordnet ist.
EP04816469A 2003-12-29 2004-12-22 Elektrode zum erzeugen eines dielektrische-barriere-entladungsplasmas Not-in-force EP1700515B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0315525A FR2864746B1 (fr) 2003-12-29 2003-12-29 Electrode pour la generation de plasma de decharge a barriere dielectrique
PCT/FR2004/003341 WO2005069702A2 (fr) 2003-12-29 2004-12-22 Electrode pour la generation de plasma de decharge a barriere dielectrique

Publications (2)

Publication Number Publication Date
EP1700515A2 EP1700515A2 (de) 2006-09-13
EP1700515B1 true EP1700515B1 (de) 2008-02-13

Family

ID=34639675

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04816469A Not-in-force EP1700515B1 (de) 2003-12-29 2004-12-22 Elektrode zum erzeugen eines dielektrische-barriere-entladungsplasmas

Country Status (6)

Country Link
EP (1) EP1700515B1 (de)
AT (1) ATE386417T1 (de)
DE (1) DE602004011830T2 (de)
ES (1) ES2302073T3 (de)
FR (1) FR2864746B1 (de)
WO (1) WO2005069702A2 (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4057723A (en) * 1976-01-23 1977-11-08 Xerox Corporation Compact corona charging device
US6049086A (en) * 1998-02-12 2000-04-11 Quester Technology, Inc. Large area silent discharge excitation radiator
US6455014B1 (en) * 1999-05-14 2002-09-24 Mesosystems Technology, Inc. Decontamination of fluids or objects contaminated with chemical or biological agents using a distributed plasma reactor
US6811757B2 (en) * 2001-04-04 2004-11-02 Ecozone Technologies Ltd. Dielectric barrier discharge fluid purification system

Also Published As

Publication number Publication date
WO2005069702A2 (fr) 2005-07-28
EP1700515A2 (de) 2006-09-13
ATE386417T1 (de) 2008-03-15
FR2864746B1 (fr) 2006-05-19
WO2005069702A3 (fr) 2006-02-02
FR2864746A1 (fr) 2005-07-01
DE602004011830D1 (de) 2008-03-27
ES2302073T3 (es) 2008-07-01
DE602004011830T2 (de) 2009-02-12

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