EP2616646B1 - VORRICHTUNG ZUR BEHANDLUNG VON RUßPARTIKEL ENTHALTENDEM ABGAS - Google Patents

VORRICHTUNG ZUR BEHANDLUNG VON RUßPARTIKEL ENTHALTENDEM ABGAS Download PDF

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Publication number
EP2616646B1
EP2616646B1 EP11769804.3A EP11769804A EP2616646B1 EP 2616646 B1 EP2616646 B1 EP 2616646B1 EP 11769804 A EP11769804 A EP 11769804A EP 2616646 B1 EP2616646 B1 EP 2616646B1
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EP
European Patent Office
Prior art keywords
flow
exhaust gas
soot particles
ionization
electrical insulation
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EP11769804.3A
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German (de)
English (en)
French (fr)
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EP2616646A1 (de
Inventor
Rolf BRÜCK
Jan Hodgson
Christian Vorsmann
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Continental Automotive GmbH
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Continental Automotive GmbH
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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
    • B03C3/36—Controlling flow of gases or vapour
    • 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
    • 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
    • B03C3/06—Plant or installations having external electricity supply dry type characterised by presence of stationary tube electrodes
    • 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
    • B03C3/12—Plant or installations having external electricity supply dry type characterised by separation of ionising and collecting stations
    • 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
    • B03C3/36—Controlling flow of gases or vapour
    • B03C3/361—Controlling flow of gases or vapour by static mechanical means, e.g. deflector
    • B03C3/363—Controlling flow of gases or vapour by static mechanical means, e.g. deflector located before the filter
    • 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
    • B03C3/41—Ionising-electrodes
    • 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
    • B03C3/45—Collecting-electrodes
    • B03C3/49—Collecting-electrodes tubular
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F01N13/0097—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/16—Selection of particular materials
    • 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
    • F01N3/023—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
    • F01N3/0231—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 special exhaust apparatus upstream of the filter for producing nitrogen dioxide, e.g. for continuous filter regeneration systems [CRT]
    • 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
    • B03C2201/00—Details of magnetic or electrostatic separation
    • B03C2201/06—Ionising electrode being a needle
    • 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
    • B03C2201/00—Details of magnetic or electrostatic separation
    • B03C2201/10—Ionising electrode has multiple serrated ends or parts
    • 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
    • B03C2201/00—Details of magnetic or electrostatic separation
    • B03C2201/30—Details of magnetic or electrostatic separation for use in or with vehicles
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/04—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an electric, e.g. electrostatic, device other than a heater
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
    • 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
    • F01N2330/30—Honeycomb supports characterised by their structural details
    • F01N2330/32—Honeycomb supports characterised by their structural details characterised by the shape, form or number of corrugations of plates, sheets or foils
    • 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
    • F01N2330/30—Honeycomb supports characterised by their structural details
    • F01N2330/38—Honeycomb supports characterised by their structural details flow channels with means to enhance flow mixing,(e.g. protrusions or projections)
    • 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
    • F01N2330/30—Honeycomb supports characterised by their structural details
    • F01N2330/42—Honeycomb supports characterised by their structural details made of three or more different sheets, foils or plates stacked one on the other
    • 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
    • F01N2330/30—Honeycomb supports characterised by their structural details
    • F01N2330/48—Honeycomb supports characterised by their structural details characterised by the number of flow passages, e.g. cell density

Definitions

  • the present invention relates to a device for the treatment of soot particles containing exhaust gas, in particular with a so-called electrostatic filter or electrostatic precipitator.
  • the invention finds particular application in the treatment of exhaust gases of mobile internal combustion engines in the automotive sector, in particular in the treatment of exhaust gases resulting from diesel fuel.
  • soot particles contained in the exhaust gas of the internal combustion engine, which must not be discharged into the environment. This is predetermined by corresponding exhaust regulations that specify limit values for the number and mass of soot particles per exhaust gas weight or exhaust gas volume and in some cases also for an entire motor vehicle. Soot particles are in particular unburned carbons and hydrocarbons in the exhaust gas.
  • soot particles In “electrostatic precipitators", the provision of an electric field and / or a plasma causes an agglomeration of small soot particles into larger soot particles and / or an electric charge in soot particles. Electrically charged soot particles and / or larger ones Soot particles are usually much easier to separate in a filter system. Soot particle agglomerates are transported carrier in an exhaust gas flow due to their greater inertia and thus deposit at deflection of an exhaust gas flow easier. Electrically charged soot particles are drawn to surfaces due to their charge, to which they attach and release their charge. This also facilitates the removal of soot particles from the exhaust stream in the operation of motor vehicles.
  • a plurality of spray electrodes and collector electrodes are regularly proposed, which are positioned in the exhaust pipe.
  • a central spray electrode which runs approximately centrally through the exhaust pipe, and a surrounding jacket surface of the exhaust pipe as a collector electrode used to form a capacitor.
  • the spray electrode for example, can be operated with a high voltage which is in the range of about 15 kV.
  • corona discharges can be formed by which the particles flowing with the exhaust gas through the electric field are charged in a unipolar manner. Due to this charge, the particles migrate to the collector electrode due to the electrostatic coulombic forces.
  • the collector electrode for example, is designed as a wire grid.
  • the attachment of particles takes place on the wire grid for the purpose of possibly combining the particles with other particles, so as to realize an agglomeration.
  • the exhaust flowing through the grid then rips the larger particles with them and leads them to classic filter systems.
  • the regeneration of filter systems in addition to the intermittent regeneration by brief heating, that is, burning of the soot (catalytically motivated, oxidative conversion), also known To convert carbon black by means of nitrogen dioxide (NO 2 ).
  • NO 2 nitrogen dioxide
  • the advantage of continuous regeneration with nitrogen dioxide is that the conversion of soot can already take place at significantly lower temperatures (in particular less than 250 ° C.). For this reason, continuous regeneration is preferred in many applications. However, this leads to the problem that it must be ensured that the nitrogen dioxide in the exhaust gas comes into contact with the deposited soot particles to a sufficient extent.
  • GB 1 022 714 discloses an ionizing device having a housing serving as a counter electrode and an electrode disposed therein.
  • the electrode is secured in the housing by means of an insulator. Compressed air is introduced into the region of the insulator fixed in the electrode so that no particles from the exhaust gas of an internal combustion engine are deposited on the insulator.
  • an exhaust treatment device in which two electrically conductive honeycomb bodies are spaced apart by a gap. Between the honeycomb bodies, an electric potential is formed so that soot particles in the gap are ionized and deposited on the downstream honeycomb body.
  • the upstream honeycomb body has a plurality of electrodes extending into the gap.
  • the honeycomb bodies are arranged insulated from one another, wherein the insulation is covered by a cover so that a deposition of soot particles is at least partially avoided.
  • the device proposed here may in particular be part of an exhaust system of a motor vehicle which has a diesel engine and is arranged in particular in an exhaust pipe of the exhaust system.
  • the exhaust gas containing the soot particles flows through an ionization element, which comprises at least one electrode, to which an electrical High voltage between 3 kV [kilovolts] and 50 kV, preferably between 5 kV and 25 kV, can be applied.
  • the tension becomes particular adjusted or controlled so that there is a corona discharge between the electrode and a counter electrode.
  • the ionization element can be formed as a simple spray electrode or rod electrode, but it is preferred that the ionization element comprises a honeycomb body with a plurality of channels through which at least one electrode is arranged at its inlet region or outlet region, which is oriented in or against the flow direction.
  • the honeycomb body may in particular, at least partially, preferably be formed entirely from an electrically conductive material, so that an electrical potential can be applied to the honeycomb body and thus simultaneously to the electrodes.
  • the at least one ionization element may also preferably have an outer tube and an inner tube arranged concentrically therewith, which form a gap traversed by the exhaust gas, wherein at least one annular electrode having a plurality of electrode tips protruding radially into the intermediate space is arranged on the inner tube on the inner tube.
  • the at least one filter element is preferably designed as a surface separator having a plurality of channels, which are permeable to the exhaust gas and extending between an inlet region and an outlet region.
  • the filter element can be used as a counterelectrode to the electrode of the ionization elements and the soot particles deposited in the filter element can be neutralized.
  • the at least one filter element is a so-called open bypass filter, in which there are no completely closed flow channels.
  • the filter element is formed with a metallic fleece and metallic corrugated layers in which openings, guide structures, etc. are provided.
  • the guide structures form flow bottlenecks in the flow passages, so that the residence time or impact probability for soot particles in the interior of the filter element is increased.
  • the regeneration of such a filter element is preferably carried out continuously based on the CRT method.
  • an oxidatively acting coating is realized in the filter element itself, either in a zone thereof or in all areas of the filter element.
  • the at least one flow-guiding device is arranged in the flow direction of the exhaust gas in front of the at least one ionization element or in front of the at least one filter element.
  • the flow-guiding device comprises elements which deflect at least one (spatially limited) part of the exhaust gas, in particular in that a part of the exhaust gas flows around the flow-guiding device at least in sections, so that the deflection is influenced only by the shape of the flow-guiding device.
  • the deflection of the partial exhaust gas flow takes place in such a way that soot particles either do not reach the ionization element or in particular an electrical insulation of the ionization element or the electrical insulation of the filter element, or meet in such a way that the exhaust gas flow there acts so that An addition of soot particles is not possible.
  • the avoidance of a soot layer on the electrical insulation and / or the ionization element also causes the formation of a short circuit between the ionizing element and / or the filter element with the exhaust pipe prevented.
  • Under flow rectifier is a device to understand that at least partially reduces the turbulence in a flow or the exhaust flow laminarized and thus produces a more uniform velocity distribution of the exhaust gas over the cross section of the exhaust pipe. This can be done, for example, by a honeycomb body with a plurality of channels through which the exhaust gas can flow.
  • the flow-guiding device is adjustable.
  • the flow direction of a part of the exhaust gas leaving the flow-guiding device can be changed.
  • the flow-guiding device is adjusted such that alternating regions of the ionization element or the filter element are flowed through by the exhaust gas, whereby deposition of soot particles on the ionization element or the electrical insulation is prevented or entrained soot particles and thus entrained be eliminated.
  • the Strömungsleit In order to prevent deposition of the soot particles on the ionization element or the electrical insulation of the filter element, the Strömungsleit leverage advantageously forms a flow-through diameter, which is smaller, preferably at least 10% smaller, more preferably at least 25% smaller than a diameter in the flow direction downstream ionizing element or filter element. In this way, the exhaust gas does not even reach the ionizing element or the electrical element surrounding the filter element Insulation. A deposition of the soot particles thus does not take place. In particular, in the case of a deflection of the soot particles by the electric field of the ionization element, the charged soot particles can not reach the ionization element and / or the electrical insulation of the filter element.
  • the at least one flow-guiding device contains a catalytic reactor. In this way, the exhaust gas flowing past the flow-guiding device can be catalytically converted.
  • the at least one flow guide is attached directly to an exhaust pipe, so that can be dispensed with further fastening elements for the flow guide.
  • a further development of the invention provides that the at least one flow guide forms a flow shadow in the region of the electrical insulation, which also prevents deposition of the soot particles at least on the ionization element or the electrical insulation of the filter element.
  • the flow guide is thus arranged in the exhaust gas flow, that the exhaust gas does not flow through the ionization element or the electrical insulation of the filter element.
  • the at least one flow guide device forms a concentrated flow in the region of the electrical insulation with an increased exhaust gas velocity.
  • the exhaust gas velocity is thus increased in relation to the average exhaust gas velocity or the exhaust gas velocity over the cross section of the exhaust gas line without the flow guiding device.
  • This pulse increase of the exhaust gas ensures that already deposited particles at least from the ionizing element or the electrical insulation can be eliminated and located in the exhaust particles can not accumulate.
  • a device in which the flow guide is arranged upstream of the ionization element, and the flow guide has a flow-through range which is dimensioned so that ionized soot particles in the exhaust stream of an electric field generated by the ionization element at least not to a surface get the ionization element or the electrical insulation of the filter element.
  • This embodiment is particularly preferably combined with an ionization element in which the outer tube and the inner tube concentrically arranged form an intermediate space through which the exhaust gas can pass, wherein at least one annular electrode with a plurality of electrode tips protruding radially into the intermediate space is arranged on the inner tube.
  • a flow obstacle is arranged radially starting from at least the outer tube or the inner tube, whose radial extent is selected in dependence on a length of the electric field of the ionization element in the flow direction, the strength of the electric field and the exhaust gas velocity so that ionized At least during operation, soot particles do not reach the surface of the ionization element or the electrical insulation of the filter element.
  • the main flow of the exhaust gas is therefore limited to a limited part of the gap, with the walls of the ionizing element forms only a small flow of exhaust gas.
  • Fig. 1 schematically shows a cross section through a device 1 according to the invention in an exhaust pipe 16.
  • an ionization element 3 and a filter device 4 is arranged behind a flow guide 8.
  • the flow guiding device 8 comprises a deflecting plate 11, which is fastened to the exhaust gas line 16 via fastening elements (not shown).
  • the ionization element 3 has an electrically conductive honeycomb body 17, which is connected to the exhaust gas line 16 via a first electrical insulation 9.1.
  • a plurality of electrodes 14 are arranged, which can be acted upon by a first electrical connection 13.1 with an electrical voltage.
  • the filter element 4 has a plurality of channels 5 through which the exhaust gas can flow and which extend between an inlet region 6 and an outlet region 7.
  • the filter element 4 is isolated from the exhaust pipe 16 with a second electrical insulation 9.2.
  • the filter element 4 can be acted upon by a second electrical connection 13.2 with an electrical voltage.
  • the exhaust gas containing soot particles 2 flows toward the ionization element 3 and is at least partially deflected by the deflecting plate 11.
  • the baffle 11 a portion of the exhaust gas is accelerated and hits at an increased speed on the first electrical insulation 9.1, whereby the soot particles 2 can not settle on the first electrical insulation 9.1 or already released on the first electrical insulation 9.1 settled particles become.
  • the exhaust gas also flows through the honeycomb body 17 of the ionization element 3, wherein the flow is at least partially laminarized.
  • the soot particles 2 are ionized in a corona discharge between the electrodes 14 and the filter element 4.
  • the charged soot particles 2 are accelerated toward the filter element 4 and deposited therein due to their charge at a higher deposition rate.
  • Fig. 2 schematically shows a cross section through a further embodiment of the device according to the invention 1.
  • This embodiment of the device 1 according to the invention is similar in construction as the embodiment according to Fig. 1 so that only the differences are discussed here.
  • the flow guide 8 is designed as a flow rectifier 10.
  • the flow rectifier 10 has a flow-through diameter 12 which is smaller than a flow-through diameter of the downstream ionization element 3.
  • the exhaust gas flow is at least partially laminarized and reduced to the diameter 12 of the flow rectifier 10 through which it can flow.
  • Fig. 3 schematically shows a sectional view of another embodiment of the device 1 according to the invention, wherein in the following only on the differences from the embodiment according to Fig. 2 will be received.
  • the flow guide device 8 has a honeycomb body 17, which holds a counterelectrode 22 of the ionization element 3.
  • the honeycomb body 17 has in an outer and an inner region closed channels 18, which with a radial extension 20 a Prevent flow through the honeycomb body 17 in these areas. Thus, a flow-through region 19 of the honeycomb body 17 is formed.
  • the ionization element 3 has an annular electrode 14 assigned to the exhaust gas line 16 with a multiplicity of electrode tips.
  • a tubular counter electrode 22 is arranged, which is held by the honeycomb body and possibly isolated from this. Thus, over a length 21, an electric field may be formed between the annular electrode 14 and the tubular counter electrode 22.
  • the radial extent 20 of the closed channels 18 is selected such that ionized soot particles 2 can not be distracted so far from the electric field present between the annular electrode 14 and the counterelectrode 22 that they can reach a surface of the ionization element 3.
  • the size of the radial extent 20 thus depends essentially on the length 21, the electric field strength and the exhaust gas velocity.
  • the present invention effectively prevents soot particles from being deposited on electrical insulation of exhaust gas cleaning components, thereby preventing the formation of a short circuit. Safe operation of the exhaust system is thus ensured.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Electrostatic Separation (AREA)
  • Exhaust Gas After Treatment (AREA)
EP11769804.3A 2010-09-15 2011-09-13 VORRICHTUNG ZUR BEHANDLUNG VON RUßPARTIKEL ENTHALTENDEM ABGAS Active EP2616646B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010045508A DE102010045508A1 (de) 2010-09-15 2010-09-15 Vorrichtung zur Behandlung von Rußpartikel enthaltendem Abgas
PCT/EP2011/065886 WO2012035035A1 (de) 2010-09-15 2011-09-13 VORRICHTUNG ZUR BEHANDLUNG VON RUßPARTIKEL ENTHALTENDEM ABGAS

Publications (2)

Publication Number Publication Date
EP2616646A1 EP2616646A1 (de) 2013-07-24
EP2616646B1 true EP2616646B1 (de) 2016-07-13

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US (1) US8906315B2 (ru)
EP (1) EP2616646B1 (ru)
JP (1) JP5883007B2 (ru)
KR (1) KR101503619B1 (ru)
CN (1) CN103119257B (ru)
DE (1) DE102010045508A1 (ru)
RU (1) RU2538217C2 (ru)
WO (1) WO2012035035A1 (ru)

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CN103557054A (zh) * 2013-11-06 2014-02-05 苏州佑瑞检测技术有限公司 一种汽车尾气循环净化装置
CN104324809A (zh) * 2014-09-11 2015-02-04 上海龙净环保科技工程有限公司 一种垂直流湿式电除尘器导流与阻流耦合结构
EP3056364B1 (en) 2015-02-11 2020-05-20 CabinAir Sweden AB Vehicle with ionizing unit for cleaning air to cabin
CN104847452B (zh) * 2015-05-14 2017-11-03 哈尔滨工业大学 等离子体与静电吸附耦合的汽车尾气净化器及净化方法
RU2645173C1 (ru) * 2016-12-26 2018-02-16 Акционерное общество "Лётно-исследовательский институт имени М.М. Громова" Способ определения содержания частиц сажи в выхлопной струе авиационного газотурбинного двигателя в полёте
JP6579150B2 (ja) * 2017-04-25 2019-09-25 トヨタ自動車株式会社 排ガス浄化装置
FI130711B1 (fi) * 2020-05-15 2024-02-05 Genano Oy Ilmanpuhdistuslaite, järjestely ja menetelmä materiaalin poistamiseksi kaasuvirrasta

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KR101503619B1 (ko) 2015-03-18
CN103119257B (zh) 2015-06-17
DE102010045508A1 (de) 2012-03-15
RU2538217C2 (ru) 2015-01-10
US8906315B2 (en) 2014-12-09
KR20130051011A (ko) 2013-05-16
WO2012035035A1 (de) 2012-03-22
US20130216440A1 (en) 2013-08-22
RU2013116733A (ru) 2014-10-20
JP2013540937A (ja) 2013-11-07
EP2616646A1 (de) 2013-07-24
CN103119257A (zh) 2013-05-22
JP5883007B2 (ja) 2016-03-09

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