EP1523382B1 - Device for separating aerosols or particles from gas - Google Patents

Device for separating aerosols or particles from gas Download PDF

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Publication number
EP1523382B1
EP1523382B1 EP03765032A EP03765032A EP1523382B1 EP 1523382 B1 EP1523382 B1 EP 1523382B1 EP 03765032 A EP03765032 A EP 03765032A EP 03765032 A EP03765032 A EP 03765032A EP 1523382 B1 EP1523382 B1 EP 1523382B1
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EP
European Patent Office
Prior art keywords
separator
flow
corona electrode
gas
electrode
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Expired - Lifetime
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EP03765032A
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German (de)
French (fr)
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EP1523382A1 (en
Inventor
Manfred Tumbrink
Heinz Fissan
Frank Jordan
Christoph Kleinert
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Mann and Hummel GmbH
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Mann and Hummel GmbH
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Publication of EP1523382A1 publication Critical patent/EP1523382A1/en
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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
    • B03C3/74—Cleaning the electrodes
    • B03C3/80—Cleaning the electrodes by gas or solid particle blasting
    • 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
    • B03C3/40—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
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0466—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with electrostatic means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/19—Crankcase ventilation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/38—Tubular collector electrode

Definitions

  • the invention relates to a device for separating aerosols or particles from gases according to the preamble of independent claim 1.
  • a disadvantage of this device is the fact that the corona electrode is in the aerosol stream and thus there is a risk of contamination of the electrode. As a result of this contamination, the electrostatic conditions and thus also the separation effect change. A cleaning of the electrode is not possible due to the installation conditions.
  • the invention has for its object to provide a means for separating aerosols or particles from gases, which has a high functionality and pollution of the charge generator is avoided. This object is achieved according to the characterizing features of the independent claim 1.
  • the essential advantage of the invention is that the corona electrode is located substantially outside the gas flow and thus no particles or liquids can attach to the corona electrode.
  • the charge generated by the corona electrode is transported via an air or gas volume flow in the region of the gases to be purified.
  • an inactive, inert gas such as nitrogen.
  • Another advantage of the device is that the charge generation is not subject to the constant requirement of the adjustment of the electric field at varying distances due to the pollution or possibly burnup. In the previously known systems, it is necessary to change the electric field according to the degree of contamination to maintain the Abscheiderial. This can be avoided by the described structure.
  • the corona electrode is surrounded by an outer electrode.
  • the electric field is formed between these two electrodes.
  • the electrical charge carriers are derived via an air volume flow between the corona electrode and the outer electrode.
  • a further embodiment of the invention is that the separator is a so-called cylinder capacitor.
  • This consists of at least two concentrically arranged hollow cylinders.
  • the flow housing itself as a capacitor surface.
  • a plurality of hollow cylinders arranged inside one another or separator plates arranged parallel to one another can be provided.
  • a plate capacitor can also be used.
  • the design of the separator is arbitrary and can be adapted to the available space.
  • a further embodiment of the invention provides to form the flow housing as part of the crankcase of an internal combustion engine.
  • the aerosol separator can be integrated into an internal combustion engine and is suitable for separating out oil mist from the crankcase gases.
  • a development of the invention is further in the purification of the air flow through an upstream filter. This filter ensures that the airflow carries no particles that attach to the corona electrode.
  • the separator and / or the corona electrode in multiple stages.
  • the efficiency can be further increased or optimize the deposition of different particle sizes.
  • a further embodiment of the invention provides for the electrostatic precipitator to be preceded by an additional oil separator in the form of a centrifugal, impact or fiber separator. This too can serve to increase the efficiency.
  • FIG. 1 schematically illustrated internal combustion engine 10 is provided with a crankcase 11.
  • This housing encloses, at least in the upper area, the cylinder block 19, in which the cylinders shown schematically with the corresponding cylinders Pistons 20 are located.
  • the so-called blow-by gas which arises during the work of the internal combustion engine, flows into the cavity 21 between the cylinder block and the crankcase 11 and passes due to an applied negative pressure according to the arrows 12 and 17 to a separator 18.
  • the blow-by gas an aerosol stream, ie an air stream contaminated with liquid.
  • the task of the separator 18 is to separate the air flow from the liquid or from the liquid components.
  • the separator 18 is structurally similar to a cylindrical capacitor.
  • this separator is connected to a DC voltage source, so that an electric field is formed between the two cylinders.
  • a so-called charging unit is provided upstream of the separator.
  • This consists of an ion source or a corona electrode 14 and an outer electrode 13.
  • a discharge occurs at the tip 22, d. H. a generation of charge carriers.
  • Other designs of the charger are conceivable.
  • an air volume flow between outer electrode and corona electrode is guided. This air flow occurs at the tip 22 of the ion source to the outside.
  • the ions (charge carriers) generated due to the voltage are deposited on the droplets or particles in the immediate surrounding area.
  • the thus electrically charged droplets are deposited in the separator 18 in the electric field.
  • the air volume flow shown according to arrow 15 can be cleaned by an appropriate filter system before entering the ion source.
  • the filter system is a commercial particle filter.
  • the inflow of the air volume flow takes place via a slight overpressure.
  • the suction of the purified blow-by gas, below the separator 18 via a suitable vacuum system, which is well known and will not be explained in detail here.
  • a pump can be used to generate negative pressure.
  • the injection of the charge carriers or of the charge carrier flow 16 can vary in accordance with the amount of blow-by gas produced. The variation is determined by the required degree of separation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrostatic Separation (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

An apparatus for separating aerosols or particles from a gas stream composed of a flow housing through which the gas containing the components to be separated flows, a separator, which is arranged in the flow housing, and a corona electrode, which is provided upstream of the separator in the direction of flow. The corona electrode is located substantially outside the gas flow. An air volume stream from the corona electrode flows into to the gas flow to transport charge carriers generated by the corona electrode into a charging zone in the flow housing.

Description

Stand der TechnikState of the art

Die Erfindung betrifft eine Einrichtung zum Abscheiden von Aerosolen oder Partikeln aus Gasen nach dem Oberbegriff des unabhängigen Anspruchs 1.The invention relates to a device for separating aerosols or particles from gases according to the preamble of independent claim 1.

Aus der EP 0 685 635 ist eine Einrichtung für eine Brennkraftmaschine bekannt, mit welcher Öl oder Ölnebel aus den Kurbelgehäusegasen abgeschieden wird. Diese sogenannte Kurbeigehäuseentlüftung weist eine durchströmbare Entlüftungsleitung auf, in deren Verlauf mindestens ein Ölabscheider angeordnet ist von dem aus eine Rücklaufleitung für abgeschiedenes Öl zum Kurbelgehäuse geführt ist. Der Ölabscheider ist ein Elektrofilter und als Rohrelektrofilter ausgebildet. Der Elektrofilter besteht aus einer Entladungselektrode, die im Inneren des durchströmten Rohres angeordnet ist, wobei zwischen der Rohrwandung und der Entladungselektrode ein elektrisches Gleichfeld erzeugt wird zur Aufladung der durchströmenden Öltröpfchen. Diese scheiden sich an der Innenseite des durchströmten Rohres ab und bilden dort einen Ölfilm. Dieser Ölfilm fließt in Richtung Ölwanne. Ein Nachteil dieser Einrichtung ist darin zu sehen, dass die Koronaelektrode sich im Aerosolstrom befindet und damit die Gefahr der Verschmutzung der Elektrode besteht. Durch diese Verschmutzung ändern sich die elektrostatischen Verhältnisse und damit auch die Abscheidewirkung. Eine Abreinigung der Elektrode ist aufgrund der Einbauverhältnisse nicht möglich.From the EP 0 685 635 a device for an internal combustion engine is known, with which oil or oil mist is separated from the crankcase gases. This so-called Kurbeigehäuseentlüftung has a through-flowable vent line, in the course of which at least one oil separator is arranged from which a return line for separated oil is guided to the crankcase. The oil separator is an electrostatic filter and designed as a tube electrostatic precipitator. The electrostatic precipitator consists of a discharge electrode, which is arranged in the interior of the flow-through tube, wherein between the tube wall and the discharge electrode, a DC electric field is generated to charge the flowing oil droplets. These separate on the inside of the flow-through pipe and form an oil film there. This oil film flows in the direction of the oil sump. A disadvantage of this device is the fact that the corona electrode is in the aerosol stream and thus there is a risk of contamination of the electrode. As a result of this contamination, the electrostatic conditions and thus also the separation effect change. A cleaning of the electrode is not possible due to the installation conditions.

Es ist weiterhin aus der DE 196 42 218 eine Ölabscheidevorrichtung, insbesondere für Verbrennungskraftmaschinen von Kraftfahrzeugen bekannt. Diese besteht aus einem in einem Gehäuse angeordneten Ölabscheideelement. Das Ölabscheideelement weist eine erste und eine zweite jeweils mit einer Hochspannungsquelle verbundene Elektrode auf, wobei beide im Strömungsweg des Ölgasgemisches angeordnet sind und unterschiedliche Polarität besitzen. Auch bei dieser Anordnung besteht die Gefahr, dass sich Schmutzpartikel an den Elektroden anlagern und damit die Wirkung des Abscheiders erheblich beeinträchtigen.It is still out of the DE 196 42 218 an oil separation device, in particular for internal combustion engines of motor vehicles known. This consists of a housing arranged in a Ölabscheideelement. The Ölabscheideelement has a first and a second electrode each connected to a high voltage source, both of which are arranged in the flow path of the oil gas mixture and have different polarity. In this arrangement, there is a risk that dirt particles attach to the electrodes and thus significantly affect the effect of the separator.

Der Erfindung liegt die Aufgabe zugrunde, eine Einrichtung zum Abscheiden von Aerosolen oder Partikeln aus Gasen zu schaffen, welche eine hohe Funktionalität aufweist und eine Verschmutzung des Ladungserzeugers vermieden wird. Diese Aufgabe wird gemäß den kennzeichnenden Merkmalen des unabhängigen Anspruchs 1 gelöst.The invention has for its object to provide a means for separating aerosols or particles from gases, which has a high functionality and pollution of the charge generator is avoided. This object is achieved according to the characterizing features of the independent claim 1.

Vorteile der ErfindungAdvantages of the invention

Der wesentliche Vorteil der Erfindung liegt darin, dass die Koronaelektrode sich im wesentlichen außerhalb der Gasströmung befindet und damit keine Partikel oder keine Flüssigkeiten sich an der Koronaelektrode anlagern können. Die von der Koronaelektrode erzeugte Ladung wird über einen Luft- oder Gasvolumenstrom in den Bereich der zu reinigenden Gase transportiert. Bei der Anwendung eines Gasvolumenstroms ist es zweckmäßig, ein inaktives, reaktionsträges Gas, wie beispielsweise Stickstoff, zu verwenden.The essential advantage of the invention is that the corona electrode is located substantially outside the gas flow and thus no particles or liquids can attach to the corona electrode. The charge generated by the corona electrode is transported via an air or gas volume flow in the region of the gases to be purified. When using a gas volume flow, it is expedient to use an inactive, inert gas, such as nitrogen.

Ein weiterer Vorteil der Einrichtung besteht darin, dass die Ladungserzeugung nicht dem ständigen Erfordernis der Anpassung des elektrischen Feldes an variierende Abstände durch die Verschmutzung bzw. gegebenenfalls Abbrand unterliegt. Bei den bisher bekannten Systemen ist es erforderlich, das elektrische Feld entsprechend des Verschmutzungsgrades zu verändern um die Abscheidewirkung aufrecht zu erhalten. Dies läßt sich durch den beschriebenen Aufbau vermeiden.Another advantage of the device is that the charge generation is not subject to the constant requirement of the adjustment of the electric field at varying distances due to the pollution or possibly burnup. In the previously known systems, it is necessary to change the electric field according to the degree of contamination to maintain the Abscheidewirkung. This can be avoided by the described structure.

Gemäß einer Ausgestaltung der Erfindung ist die Koronaelektrode von einer Außenelektrode umgeben. Das elektrische Feld bildet sich zwischen diesen beiden Elektroden aus. Die elektrischen Ladungsträger werden über einen Luftvolumenstrom zwischen Koronaelektrode und Außenelektrode abgeleitet.According to one embodiment of the invention, the corona electrode is surrounded by an outer electrode. The electric field is formed between these two electrodes. The electrical charge carriers are derived via an air volume flow between the corona electrode and the outer electrode.

Eine weitere Ausgestaltung der Erfindung besteht darin, dass der Abscheider ein sogenannter Zylinderkondensator ist. Dieser besteht aus wenigstens zwei konzentrisch zueinander angeordneten Hohlzylindern. Selbstverständlich besteht auch die Möglichkeit, das Strömungsgehäuse selbst als Kondensatorfläche zu nutzen. Außerdem können mehrere ineinander angeordnete Hohlzylinder oder auch parallel zueinander angeordnete Abscheiderplatten vorgesehen sein. Anstelle des Zylinderkondensators kann auch ein Plattenkondensator angewendet werden. Die Ausbildung des Abscheiders ist beliebig und kann an den vorhandenen Bauraum angepaßt werden.A further embodiment of the invention is that the separator is a so-called cylinder capacitor. This consists of at least two concentrically arranged hollow cylinders. Of course, it is also possible to use the flow housing itself as a capacitor surface. In addition, a plurality of hollow cylinders arranged inside one another or separator plates arranged parallel to one another can be provided. Instead of the cylindrical capacitor, a plate capacitor can also be used. The design of the separator is arbitrary and can be adapted to the available space.

Eine weitere Ausgestaltung der Erfindung sieht vor, das Strömungsgehäuse als Teil des Kurbelgehäuses einer Brennkraftmaschine auszubilden. Dadurch läßt sich die Aerosolabscheideeinrichtung in eine Brennkraftmaschine integrieren und eignet sich dazu, Ölnebel aus den Kurbelgehäusegasen auszuscheiden.A further embodiment of the invention provides to form the flow housing as part of the crankcase of an internal combustion engine. As a result, the aerosol separator can be integrated into an internal combustion engine and is suitable for separating out oil mist from the crankcase gases.

Eine Weiterbildung der Erfindung liegt ferner in der Reinigung des Luftvolumenstroms durch einen vorgeschalteten Filter. Dieser Filter sorgt dafür, dass der Luftstrom keine Partikel mitführt, die sich an der Koronaelektrode anlagern.A development of the invention is further in the purification of the air flow through an upstream filter. This filter ensures that the airflow carries no particles that attach to the corona electrode.

Es besteht die Möglichkeit, den Abscheider und / oder die Koronaelektrode mehrstufig auszubilden. Damit läßt sich der Wirkungsgrad noch weiter erhöhen bzw. die Abscheidung unterschiedlicher Partikelgrößen optimieren.It is possible to form the separator and / or the corona electrode in multiple stages. Thus, the efficiency can be further increased or optimize the deposition of different particle sizes.

Eine weitere Ausgestaltung der Erfindung sieht vor, dem Elektroabscheider einen zusätzlichen Ölabscheider in Form eines Fliehkraft-, Prall- oder Faserabscheider vorzuschalten. Auch dies kann der Erhöhung des Wirkungsgrades dienen.A further embodiment of the invention provides for the electrostatic precipitator to be preceded by an additional oil separator in the form of a centrifugal, impact or fiber separator. This too can serve to increase the efficiency.

Diese und weitere Merkmale von bevorzugten Weiterbildungen der Erfindung gehen außer aus den Ansprüchen auch aus der Beschreibung und der Zeichnung hervor, wobei die einzelnen Merkmale jeweils für sich allein oder zu mehreren in Form von Unterkombinationen bei der Ausführungsform der Erfindung und auf anderen Gebieten verwirklicht sein und vorteilhafte sowie für sich schutzfähige Ausführungen darstellen können, für die hier Schutz beansprucht wird.These and other features of preferred embodiments of the invention will become apparent from the claims and from the description and the drawings, wherein the individual features are realized individually or in each case in the form of sub-combinations in the embodiment of the invention and in other fields and can represent advantageous and protectable versions for which protection is claimed here.

Zeichnungdrawing

Weitere Einzelheiten der Erfindung werden in der Zeichnung anhand von schematischen Ausführungsbeispielen beschrieben. Hierbei zeigt

Figur 1
die schematische Darstellung einer Einrichtung zum Abscheiden von Aeroso- len oder Partikeln aus Gasen.
Further details of the invention are described in the drawing with reference to schematic embodiments. This shows
FIG. 1
the schematic representation of a device for separating aerosols or particles from gases.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Die in Figur 1 schematisch dargestellte Brennkraftmaschine 10 ist mit einem Kurbelgehäuse 11 versehen. Dieses Gehäuse umschließt zumindest im oberen Bereich den Zylinderblock 19, in welchem sich die schematisch dargestellten Zylinder mit den entsprechenden Kolben 20 befinden. Das sogenannte Blow-By-Gas, welches während der Arbeit der Brennkraftmaschine entsteht, strömt in den Hohlraum 21 zwischen Zylinderblock und Kurbelgehäuse 11 und gelangt aufgrund eines anliegenden Unterdrucks gemäß den Pfeilen 12 und 17 zu einem Abscheider 18. Das Blow-By-Gas ist ein Aerosolstrom, d. h. ein Luftstrom, der mit Flüssigkeit kontaminiert ist.In the FIG. 1 schematically illustrated internal combustion engine 10 is provided with a crankcase 11. This housing encloses, at least in the upper area, the cylinder block 19, in which the cylinders shown schematically with the corresponding cylinders Pistons 20 are located. The so-called blow-by gas, which arises during the work of the internal combustion engine, flows into the cavity 21 between the cylinder block and the crankcase 11 and passes due to an applied negative pressure according to the arrows 12 and 17 to a separator 18. The blow-by gas an aerosol stream, ie an air stream contaminated with liquid.

Aufgabe des Abscheiders 18 ist es, den Luftstrom von der Flüssigkeit bzw. von den flüssigen Bestandteilen zu trennen. Der Abscheider 18 ähnelt konstruktiv einem Zylinderkondensator.The task of the separator 18 is to separate the air flow from the liquid or from the liquid components. The separator 18 is structurally similar to a cylindrical capacitor.

In dem dargestellten Ausführungsbeispiel ist dieser Abscheider mit einer Gleichspannungsquelle verbunden, so dass sich ein elektrisches Feld zwischen den beiden Zylindern ausbildet. Stromaufwärts des Abscheiders ist eine sogenannte Aufladungseinheit vorgesehen. Diese besteht aus einer Ionenquelle bzw. einer Koronaelektrode 14 sowie einer Außenelektrode 13. Durch eine elektrische Spannung zwischen Außenelektrode und Koronaelektronde entsteht an der Spitze 22 eine Entladung, d. h. eine Erzeugung von Ladungsträgern. Andere Bauformen der Aufladeeinheit sind denkbar.In the illustrated embodiment, this separator is connected to a DC voltage source, so that an electric field is formed between the two cylinders. Upstream of the separator, a so-called charging unit is provided. This consists of an ion source or a corona electrode 14 and an outer electrode 13. By an electrical voltage between the outer electrode and corona, a discharge occurs at the tip 22, d. H. a generation of charge carriers. Other designs of the charger are conceivable.

Gemäß Pfeil 15 wird ein Luftvolumenstrom zwischen Außenelektrode und Koronaelektrode geführt. Dieser Luftvolumenstrom tritt an der Spitze 22 der Ionenquelle nach außen. Die aufgrund der Spannung erzeugten Ionen (Ladungsträger) lagern sich an den Tröpfchen oder auch Partikeln im unmittelbaren Umgebungsbereich an. Die somit elektrisch geladenen Tröpfchen werden im Abscheider 18 im elektrischen Feld abgeschieden. Der gemäß Pfeil 15 dargestellte Luftvolumenstrom kann durch ein entsprechendes Filtersystem vor Eintritt in die Ionenquelle gereinigt werden. Das Filtersystem ist ein handelsüblicher Partikelfilter. Die Einströmung des Luftvolumenstroms erfolgt über einen geringfügigen Überdruck. Die Absaugung des gereinigten Blow-By-Gases, unterhalb des Abscheiders 18 erfolgt über ein geeignetes Unterdrucksystem, welches allgemein bekannt ist und an dieser Stelle nicht näher erläutert wird. Selbstverständlich kann zur Unterdruckerzeugung auch eine Pumpe genutzt werden.According to arrow 15, an air volume flow between outer electrode and corona electrode is guided. This air flow occurs at the tip 22 of the ion source to the outside. The ions (charge carriers) generated due to the voltage are deposited on the droplets or particles in the immediate surrounding area. The thus electrically charged droplets are deposited in the separator 18 in the electric field. The air volume flow shown according to arrow 15 can be cleaned by an appropriate filter system before entering the ion source. The filter system is a commercial particle filter. The inflow of the air volume flow takes place via a slight overpressure. The suction of the purified blow-by gas, below the separator 18 via a suitable vacuum system, which is well known and will not be explained in detail here. Of course, a pump can be used to generate negative pressure.

Die Einblasung der Ladungsträger bzw. des Ladungsträgerstroms 16 kann entsprechend der anfallenden Menge an Blow-By-Gas variieren. Die Variation wird durch den erforderlichen Abscheidegrad bestimmt.The injection of the charge carriers or of the charge carrier flow 16 can vary in accordance with the amount of blow-by gas produced. The variation is determined by the required degree of separation.

Claims (9)

  1. Device for separating aerosols or particles from gases, consisting of a flow housing through which the gases containing the particles to be separated flow, a separator which is disposed in the flow housing and a corona electrode which is, seen in flow direction, provided upstream the separator, characterized in that the corona electrode is mainly provided outside of the gas flow and that an air/gas volume flow flows from the corona electrode into the gas flow for transporting the charge carrier generated by the corona electrode into a charging area in the flow housing.
  2. Device according to claim 1, characterized in that the corona electrode is surrounded by an outer electrode and that the air/gas volume flow flows between corona electrode and outer electrode.
  3. Device according to claim 1 or 2, characterized in that the separator is a cylindrical capacitor which consists of at least two hollow cylinders with different diameters disposed concentrically to each other and that there is an electric field between the two hollow cylinders.
  4. Device according to one of the above claims, characterized in that the flow housing is one part of the crankcase of an internal combustion engine and that by means of the separator oil mist is separated from the crankcase gases.
  5. Device according to one of the above claims, characterized in that a filter is provided for cleaning the air needed in addition to the air/gas flow volume.
  6. Device according to one of the above claims, characterized in that the separator and/or corona electrode is of multi-stage design.
  7. Device according to one of the above claims, characterized in that another oil separator is located upstream the electric separator, the oil separator being a centrifugal separator and/or impact separator and/or fiber separator.
  8. Device according to one of the above claims, characterized in that the separator or one part of the separator is formed by the flow housing.
  9. Device according to claim 1 or 2, characterized in that the separator is a plate capacitor which consists of at least two plates of different polarity disposed parallel to each other and that an electric field is generated between the plates.
EP03765032A 2002-07-18 2003-07-17 Device for separating aerosols or particles from gas Expired - Lifetime EP1523382B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10232602 2002-07-18
DE10232602A DE10232602A1 (en) 2002-07-18 2002-07-18 Device for separating aerosols or particles from gases
PCT/EP2003/007800 WO2004009243A1 (en) 2002-07-18 2003-07-17 Device for separating aerosols or gas particles

Publications (2)

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EP1523382A1 EP1523382A1 (en) 2005-04-20
EP1523382B1 true EP1523382B1 (en) 2010-09-15

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EP03765032A Expired - Lifetime EP1523382B1 (en) 2002-07-18 2003-07-17 Device for separating aerosols or particles from gas

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US (1) US7105042B2 (en)
EP (1) EP1523382B1 (en)
AT (1) ATE481176T1 (en)
AU (1) AU2003246715A1 (en)
DE (2) DE10232602A1 (en)
WO (1) WO2004009243A1 (en)

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DE102018204267A1 (en) * 2018-03-20 2019-09-26 Mahle International Gmbh Oil mist separator for an internal combustion engine

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Also Published As

Publication number Publication date
WO2004009243A1 (en) 2004-01-29
US20050235829A1 (en) 2005-10-27
US7105042B2 (en) 2006-09-12
EP1523382A1 (en) 2005-04-20
ATE481176T1 (en) 2010-10-15
DE50313098D1 (en) 2010-10-28
DE10232602A1 (en) 2004-02-05
AU2003246715A1 (en) 2004-02-09

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