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EP0658685B1 - Dispositif pour séparer de particules de suie contenues dans le gaz d'échappement d'un moteur à combustion interne - Google Patents

Dispositif pour séparer de particules de suie contenues dans le gaz d'échappement d'un moteur à combustion interne Download PDF

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Publication number
EP0658685B1
EP0658685B1 EP19940890211 EP94890211A EP0658685B1 EP 0658685 B1 EP0658685 B1 EP 0658685B1 EP 19940890211 EP19940890211 EP 19940890211 EP 94890211 A EP94890211 A EP 94890211A EP 0658685 B1 EP0658685 B1 EP 0658685B1
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Prior art keywords
electrically conductive
flow
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conductive layers
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German (de)
English (en)
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EP0658685A3 (fr
EP0658685A2 (fr
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Carl Maria Dr. Fleck
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/40—Electrode constructions
    • B03C3/60—Use of special materials other than liquids
    • B03C3/62—Use of special materials other than liquids ceramics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/04—Plant or installations having external electricity supply dry type
    • B03C3/08—Plant or installations having external electricity supply dry type characterised by presence of stationary flat electrodes arranged with their flat surfaces parallel to the gas stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/01—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust by means of electric or electrostatic separators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
    • F01N3/0222—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being monolithic, e.g. honeycombs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/027—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/027—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means
    • F01N3/0275—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means using electric discharge means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/06—Ceramic, e.g. monoliths

Definitions

  • the invention relates to an electrostatic precipitator for separating soot particles from the exhaust gases of internal combustion engines according to the preamble of claim 1.
  • a ceramic honeycomb body is provided on two opposite outer surfaces with electrodes, which are arranged essentially parallel to the flow direction of the exhaust gases determined by the channels of the honeycomb body, a high voltage of 10 kV to 20 kV being applied to these electrodes.
  • a high voltage of 10 kV to 20 kV being applied to these electrodes.
  • the electrostatic filter is operated with such a high voltage that electrons are emitted from the more negative of the channel surfaces, which accelerate to hit the deposited soot through the collecting field and initiate oxidation reactions.
  • This process is supported by the deposition of negatively charged oxygen ions on the substrate surface, which on the one hand are more reactive than oxygen radicals and on the other hand increase the oxygen partial pressure on the substrate surface.
  • an electrostatic filter of the type mentioned at the outset was known from WO-A1-91 / 16528, in which a ceramic honeycomb body is provided which has through-passages through which the exhaust gas can flow and which are arranged one above the other in the manner of a brick wall.
  • electrodes are arranged on the outside of the filter and in the interior of a bore passing through it, through which the exhaust gases are supplied, a plurality of rows of channels being arranged between these electrodes. With such a filter, the production of the ceramic body is difficult.
  • the aim of the invention is to avoid these disadvantages and to propose a device of the type mentioned at the outset which is simple to manufacture and operate.
  • the construction of the device serving as a filter by means of several layers of electrically conductive and ceramic materials can be produced very easily.
  • Steel foils can also be used, which are provided with one, but preferably two, thin ceramic coatings, and the ceramic material can be applied by plasma coating.
  • the relatively small height of the channels through which the exhaust gas can flow in the area of the filter ensures that an essentially laminar flow is formed and therefore the soot particles accumulate and are oxidized by the radicals caused by the electric field.
  • the voltage drop in the ceramic substrates themselves must of course also be taken into account. If this is limited to 100 volts to 400 volts per substrate, the required specific resistances of the ceramic material at the desired average working temperature at which the combustion process is to take place, depending on the filter size, are 10 6 ohm cm to 10 10 ohm cm, preferably 10 7 ohm cm to 10 9 ohm cm.
  • the ceramic starting material can also be doped with vanadium or strontium, preferably with strontium titanate.
  • Fig.1 An arrangement according to the invention of ceramic filter plates with series connection.
  • Fig. 2 An external series connection of the filter cells.
  • Fig.3 A parallel connection of the filter cells.
  • Fig. 4 An outline and plan view of an embodiment of filter cells connected in parallel according to the invention.
  • Fig. 5 A schematic representation of a winding electrostatic filter connected in series.
  • Fig. 6 Winding electrostatic precipitator in parallel.
  • Fig. 7 elevation and plan view of an embodiment of parallel connected filter cells.
  • FIG. 1 shows a stack, the layers of which are formed by ceramic plates 1 structured on one side, which together with the smooth rear sides of the same plates 1 form flow channels 2 through which the exhaust gas to be cleaned flows.
  • the spacers 3 formed on one side on the plates 1 can be formed by webs running in the direction of flow or interrupted knobs which only ensure the distance to the next plate.
  • This stack of plates 1 is contacted only on its first and last plate 1 with high-voltage electrodes 4, 5, between which there is high voltage.
  • the individual flow channels 2 lying one below the other are electrically connected in series internally, the flow channels 2 being arranged in a brick wall manner offset from one another.
  • FIG. 2 shows an external electrical series connection according to the invention of these flow channels through metal foils 4 'which are located between two structured plates 1 and are connected between the respective voltage sources 6, which can be stacked independently of the potential.
  • the spacers 3 shows an electrical parallel connection of the flow channels 2 according to the invention.
  • the plates 1 structured on one side are arranged alternately with the spacers 3 upwards and downwards.
  • the electrodes 4 are connected in parallel and connected to one pole + a DC voltage source and all electrodes 5 to the second pole - the DC voltage source, which only has to deliver a relatively low voltage, since this only requires the required field strength in a position of Flow channels 2 must be sufficient.
  • FIG. 4 shows sections from the elevation and plan view of a section of a filter according to FIG. 3.
  • the stack consists of layers of ceramic plates 1 with nubs on one side, with a spacer 3 designed as a steel foil between two of them with mutually directed knobs Electrode 4 is arranged.
  • This steel foil is stiff enough to offer resistance to the spacers 3 even at higher temperatures and forms with two ceramic plates 1 two opposing flow channels 2, which are in contact with electrodes 5 made of thinner foils, each of which also delimits plates on two flow channels 2 1 is present.
  • Ceramic plates 1 and electrodes 4 and 5 are held by corresponding steel pins 7 and contacted by means of spacer rings 8.
  • FIG. 5 shows a winding electrostatic filter according to the invention, which is wound in one layer from a ceramic substrate and is contacted on the inside and outside with high-voltage electrodes 4 and 5.
  • the spacers 3 are designed as webs and are approximately 4 mm high and determine the height of the flow channels 2.
  • FIG. 6 shows a winding electrostatic filter according to the invention consisting of two electrodes 4, 5, which are insulated from one another by steel foils, each with a ceramic plasma coating 1 ′ on both sides and corresponding spacers 3 formed as ceramic balls, which have a diameter of approx. 2 mm and which are only due to the voltage or .
  • Deformation of the steel foils forming the electrodes 4, 5 are fixed.
  • the filter is wound in two layers from mutually insulated foils and therefore consists of two large flow channels 2 which are connected in parallel.
  • the ceramic coated steel foils are about 2mm apart and the tension between the metal foils serving as electrodes 4, 5 is approximately 300V.
  • the stack. consists of electrodes 4 and 5, plasma-coated on both sides, made of thin, heat-resistant steel plates with sufficient flexural strength to be able to find 3 ceramic plates 40 mm to 50 mm wide and 2 mm to 4 mm high as spacers, on the sides of the coated electrodes 4 and 5 are arranged and thus limit the flow channels 2 on both sides.
  • These electrodes 4 and 5 are held by corresponding steel pins 7 and alternately contacted on both sides of the flow channels by electrically conductive spacer rings 8 so that steel pins with different potential are preferably opposite one another.
  • the ceramic coating 1 'ends before the spacer rings 8 but only within the ceramic spacer 3.
  • the plasma coating 1 has at working temperatures a volume resistivity of at least 10 5 ohms and cm 2, preferably between 10 6 ohms and cm 2 and 10 8 ohms and cm 2 .
  • Each of the two electrodes 4, 5 is clamped on both sides of the flow channel 2, so that it is possible to reduce the thickness of the electrodes to such an extent that they are stretched as thin foils through the steel pins 7 and must therefore maintain their intended mutual distances.
  • Flow channels 2 of this type can be stacked at any height and are particularly suitable for large-volume diesel internal combustion engines, but also for large machines with small plate spacings d, but at least compliance with the dimensional formula d [cm] 500 v [cm / sec] must be taken into account if v represents the average speed through the flow channels 2.
  • FIG. 8 shows an improvement of the device shown in FIG. 7 by the integration of the ionization part in the Separation part of the diesel electrostatic filter according to the invention.
  • the electrode edge leaned towards the gas flow is set back and at least one discharge wire 10 is welded on by spot welding 11 and the remaining lateral remnants of the electrode 4. This results in a concentration of the field on the wire surface and the associated stronger gas discharge leads to a higher charge of the soot particles flowing past.
  • the wire has a diameter between 50 microns and 300 microns and consists of a corrosion-resistant high-temperature alloy, a superalloy or tungsten and is preferably gold-plated or platinum-plated.
  • FIG. 9 shows a further improvement according to the invention of the device shown in FIG. 7 by separating the part of the negative electrode 4 'carrying the discharge wires 10 from the remaining part of this electrode 4.
  • This embodiment of the device according to the invention allows the discharge voltage to be supplied separately by at least one of the steel pins 7 'and thus a regulation of the discharge current.
  • the discharge on the wires can preferably be increased by superimposing the direct voltage with a high-frequency alternating voltage without the risk of a sparkover.
  • the second electrode 5 contacted by the steel pin 7 ′′ can also be separated from the remaining plates 5 in the area of the discharge wires, so that the filter unit is only held together by the ceramic spacers 3.
  • the entire filter unit is supplied by one type of its steel pins with approximately 300 volts to 500 volts, while the steel pins of the other type are grounded.
  • a separation of the grounded plate type in this area is also sufficient for the control of the discharge wires, by means of which the high frequency is then supplied and the discharge intensity is regulated.
  • the somewhat susceptible creep rupture strength of the discharge wires can also be avoided by replacing them again with plates, preferably in strips running transversely to the flow direction, with gaps, which are then mainly operated by a high-frequency-controlled glow discharge.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Exhaust Gas After Treatment (AREA)

Claims (20)

  1. Filtre électrique destiné à extraire les particules de suie des gaz d'échappement des moteurs à combustion interne, en particulier des moteurs Diesel, dans lequel au moins une couche constituée par un isolant électrique est disposée entre au moins deux couches constituées par des conducteurs électriques, qui font fonction d'électrodes à des potentiels électriques différents, et dans lequel, entre au moins deux couches, il y a toujours un des canaux d'écoulement superposés qui reste dégagé pour la circulation des gaz d'échappement, lesquels sont bordés au moins d'un côté par une couche isolante, et le champ électrique est perpendiculaire au sens d'écoulement des gaz d'échappement, caractérisé en ce que le filtre électrique est formé par des couches (1, 4, 5) de matériaux conducteurs et de matériaux céramiques régulièrement empilées ou enroulées, lesquelles sont écartées les unes des autres par des écarteurs (3) réalisés dans un isolant électrique, et l'on a prévu deux couches électriquement conductrices (4, 5), à des potentiels différents, de part et d'autre de chaque canal d'écoulement (2), la différence de potentiel des potentiels électriques auxquels sont connectées deux couches conductrices électriques (4, 5) contiguës étant suffisante pour garantir dans la section d'écoulement libre une intensité de champ égale à 100 V/mm au moins, et dans chaque canal d'écoulement (2) la surface de jonction négative, traversée par un champ électrique, comporte une surface céramique, les couches conductrices électriques (4, 5) présentent une section constante et la dimension d de la section d'écoulement d'au moins un canal d'écoulement (2) dans le sens du champ électrique obéit à la relation : d [cm] ≤ 500 v [cmsec -1 ] ,
    Figure imgb0006
     dans laquelle v représente la vitesse d'écoulement moyenne des gaz d'échappement à épurer dans la section d'écoulement concernée du filtre électrique.
  2. Dispositif selon la revendication 1, caractérisé en ce que l'intensité du champ dans chaque canal d'écoulement est au moins égale à 300 V/mm et la dimension d de la section d'écoulement d'au moins un canal d'écoulement (2) dans le sens du champ électrique obéit à la relation : d [cm] ≤ 200 v [cmsec -1 ] ,
    Figure imgb0007
     dans laquelle v représente la vitesse d'écoulement moyenne des gaz d'échappement à épurer dans la section d'écoulement concernée du filtre électrique.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce qu'au moins une face d'au moins une couche isolante (1) est munie d'écarteurs (3) en forme d'entretoises orientées dans le sens d'écoulement ou en forme de nodules.
  4. Dispositif selon la revendication 3, caractérisé en ce que les écarteurs (3) des couches isolantes (1) superposées sont décalés les uns par rapport aux autres.
  5. Dispositif selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la distance entre les écarteurs (3), parallèles les uns aux autres, sur une couche isolante (1) est au moins égale à 10 mm, de préférence 20 mm au moins.
  6. Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'il est prévu de monter deux groupes de couches électriquement conductrices (4, 5) à des potentiels différents, chaque deuxième couche électriquement conductrice (4, 5) étant au même potentiel électrique.
  7. Dispositif selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'il comporte deux couches isolantes (1), céramiques par exemple, dont une face est munie d'écarteurs (3) en forme d'entretoises ou de nodules, dans lesquelles les écarteurs (3) sont orientés les uns vers les autres, s'enclenchent dans ces premières couches électriquement conductrices (4), qui sont par exemple des feuilles métalliques, et ces empilements quant à eux sont reliés électriquement par un montage en parallèle à des deuxièmes couches électriquement conductrices (5), par exemple des feuilles métalliques, en formant avec elles un nouvel empilement alterné, les deuxièmes couches électriquement conductrices (5) étant interconnectées et étant à un potentiel négatif, et toutes les premières couches électriquement conductrices (4) étant interconnectées et étant à un potentiel positif.
  8. Dispositif selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le filtre électrique est composé d'écarteurs (3) intercalés, formés par des feuilles métalliques revêtues d'un matériau céramique, chaque deuxième feuille métallique étant au même potentiel.
  9. Dispositif selon la revendication 8, caractérisé en ce que le filtre électrique est enroulé de manière à former deux couches constitués par des feuilles métalliques isolantes mutuellement, dont au moins une face, de préférence les deux faces, est revêtue d'un matériau céramique et ces deux feuilles sont reliées aux pôles d'une source de courant, des écarteurs (3) étant disposés entre les feuilles métalliques.
  10. Dispositif selon la revendication 9, caractérisé en ce que les écarteurs (3) incorporés entre les feuilles métalliques enroulées et revêtues d'un matériau céramique, sont des billes en céramique, qui sont fixées dans leur position sous l'effet de la tension et de la déformation élastique des deux feuilles métalliques enroulées.
  11. Dispositif selon l'une quelconque des revendications 1 à 10, caractérisé en ce que l'épaisseur des couches isolantes (1) en céramique est inférieure à 3 mm, de préférence inférieure à 2 mm, et lesdites couches isolantes contiennent des fibres de renforcement, de préférence en verre de quartz.
  12. Dispositif selon l'une quelconque des revendications 1 à 11, caractérisé en ce que les couches isolantes (1) et les écarteurs (3) n'ont pas la même résistivité, la résistivité des écarteurs (3) étant nettement plus élevée que celle des couches isolantes (1), les valeurs de résistivité particulièrement avantageuses étant comprises entre 106 ohm cm et 1010 ohm cm pour les couches isolantes (1) et étant de préférence supérieures à 1011 ohm cm pour les écarteurs (3).
  13. Dispositif selon l'une quelconque des revendications 1 à 12, caractérisé en ce que la courbe de température de la tension de fonctionnement correspond à chacune des valeurs de résistivité des couches isolantes (1) et des écarteurs (3).
  14. Dispositif selon l'une quelconque des revendications 1 à 13, caractérisé en ce que les couches isolantes sont réalisées dans un matériau avec un coefficient de température électrique positif.
  15. Dispositif selon l'une quelconque des revendications 1 à 14, caractérisé en ce que le matériau des couches isolantes (1) présente une résistivité comprise entre 106 ohm cm et 1010 ohm cm, de préférence entre 107 ohm cm et 109 ohm cm.
  16. Dispositif selon l'une quelconque des revendications 1 à 15, caractérisé en ce que la surface du matériau céramique utilisé pour les couches isolantes (1) contient au moins 10 %, de préférence au moins 30 %, de pores ouverts.
  17. Dispositif selon l'une quelconque des revendications 1 à 16, caractérisé en ce que le matériau céramique est dopé avec du vanadium et/ou du strontium, de préférence avec du titanate de strontium.
  18. Dispositif selon l'une quelconque des revendications 1 à 17, caractérisé en ce que, dans la couche la plus négative des deux couches électriquement conductrices de chaque canal d'écoulement (2), le bord en regard du sens d'écoulement des gaz d'échappement de la couche conductrice (5) est décalé vers l'arrière, et au moins un fil de décharge est fixé contre les parties latérales de ces couches (4).
  19. Dispositif selon l'une quelconque des revendications 1 à 18, caractérisé en ce que les couches électriquement conductrices (4) sur lesquelles est fixé au moins un fil de décharge (10), sont séparées mécaniquement dans le sens perpendiculaire au sens de l'écoulement, et électriquement de manière amorçable, des autres couches électriquement conductrices (4).
  20. Dispositif selon l'une quelconque des revendications 1 à 19, caractérisé en ce que les couches électriquement conductrices positives (5), dans la zone des fils de décharge (10), sont elles aussi séparées mécaniquement et électriquement des autres couches électriquement conductrices (5) dans le sens perpendiculaire au sens de l'écoulement, et en ce que, de préférence, une certaine catégorie de ces couches électriquement conductrices (4, 5) peut être amorcée à l'aide d'une tension à haute fréquence.
EP19940890211 1993-12-17 1994-12-14 Dispositif pour séparer de particules de suie contenues dans le gaz d'échappement d'un moteur à combustion interne Expired - Lifetime EP0658685B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT2562/93 1993-12-17
AT256293A ATA256293A (de) 1993-12-17 1993-12-17 Elektrofilter zum abscheiden von russpartikeln aus den abgasen von brennkraftmaschinen

Publications (3)

Publication Number Publication Date
EP0658685A2 EP0658685A2 (fr) 1995-06-21
EP0658685A3 EP0658685A3 (fr) 1995-12-20
EP0658685B1 true EP0658685B1 (fr) 1997-10-22

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EP19940890211 Expired - Lifetime EP0658685B1 (fr) 1993-12-17 1994-12-14 Dispositif pour séparer de particules de suie contenues dans le gaz d'échappement d'un moteur à combustion interne

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EP (1) EP0658685B1 (fr)
AT (1) ATA256293A (fr)
DE (1) DE59404421D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110461477A (zh) * 2017-02-03 2019-11-15 株式会杜东日技硏 过滤装置
EP4067758A4 (fr) * 2019-11-25 2023-12-27 LG Electronics Inc. Conditionneur d'air

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WO1997002410A1 (fr) * 1995-07-06 1997-01-23 Fleck Carl M Filtre a suie, notamment pour gaz d'echappement de moteurs diesel
DE10007130C1 (de) * 2000-02-17 2001-05-17 Siemens Ag Verfahren und Vorrichtung zur plasmainduzierten Minderung der Rußemission von Dieselmotoren
FR2822893B1 (fr) * 2001-03-29 2003-07-18 Renault Systeme de traitement des gaz d'echappement
CN112502816A (zh) * 2020-12-14 2021-03-16 艾蓝腾新材料科技(上海)有限公司 一种发动机尾气处理用合金催化剂载体结构

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GB227022A (en) * 1924-04-03 1925-01-08 Int Precipitation Co Process of and apparatus for the electrical precipitation of suspended particles from gaseous fluids
IT1196822B (it) * 1986-12-05 1988-11-25 Iveco Fiat Filtro autorigenerante per i gas di scarico di un motore a combustione interna
US5009763A (en) * 1989-04-24 1991-04-23 Advanced Technologies Management, Inc. Honeycomb solid oxide electrolytic cell assembly and method
ES2048014T3 (es) * 1990-04-23 1994-03-01 Fleck Carl M Procedimiento y dispositivo para la limpieza de gases de escape de particulas.
JP3018457B2 (ja) * 1990-10-05 2000-03-13 株式会社デンソー 自己発熱型フィルタ

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110461477A (zh) * 2017-02-03 2019-11-15 株式会杜东日技硏 过滤装置
EP4067758A4 (fr) * 2019-11-25 2023-12-27 LG Electronics Inc. Conditionneur d'air

Also Published As

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EP0658685A3 (fr) 1995-12-20
EP0658685A2 (fr) 1995-06-21
ATA256293A (de) 1998-10-15
DE59404421D1 (de) 1997-11-27

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