DE3715174A1 - Process for the regeneration of soot-coated surfaces and filters of ceramic or mineral materials or coatings - Google Patents

Process for the regeneration of soot-coated surfaces and filters of ceramic or mineral materials or coatings

Info

Publication number
DE3715174A1
DE3715174A1 DE19873715174 DE3715174A DE3715174A1 DE 3715174 A1 DE3715174 A1 DE 3715174A1 DE 19873715174 DE19873715174 DE 19873715174 DE 3715174 A DE3715174 A DE 3715174A DE 3715174 A1 DE3715174 A1 DE 3715174A1
Authority
DE
Germany
Prior art keywords
soot
filters
coatings
mineral materials
ceramic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE19873715174
Other languages
German (de)
Inventor
Christian Bergemann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE19873715174 priority Critical patent/DE3715174A1/en
Publication of DE3715174A1 publication Critical patent/DE3715174A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/80—Chemical processes for the removal of the retained particles, e.g. by burning
    • B01D46/84—Chemical processes for the removal of the retained particles, e.g. by burning by heating only
    • 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

Abstract

In order to regenerate soot-coated surfaces and filters of ceramic or mineral materials or coatings, the soot is used as inhomogeneous electrical conductor with the passage of a high voltage current. The electrical discharges which this produces between the individual soot particles results in the latter being burnt off. The high voltage is applied to two or more electrodes which are situated in or on the surface or the filter. The geometry, number and arrangement of the high-voltage electrodes are designed specific to the application depending on concentration, layer thickness and depth of penetration of the soot and on the surface properties of the filter body or surface.

Description

Gegenstand der Erfindung ist ein Verfahren zum regenerieren rußbehafteter Flächen und Filter aus keramischen oder mineralischen Werkstoffen oder Beschichtungen. Ein derartiges Verfahren ist von großem praktischen Interesse, denn es ermöglicht mit geringer Leistung z. B. die Regeneration von Rußfiltern für Kraftfahrzeuge oder den Abbrand von Rußschichten auf Wärme­ tauschersystemen.The invention relates to a method for regenerate sooty surfaces and filters made of ceramic or mineral materials or coatings. Such a process is of great practical interest because it enables with low power z. B. the Regeneration of soot filters for motor vehicles or the burning of soot layers to heat exchanger systems.

Es sind bereits Verfahren zur Regeneration von rußbehafteten Flächen und Filter bekannt­ geworden, die diese Aufgabe auf thermischem, chemischem oder mechanischem Wege vollziehen. Diese lassen sich in 4 Gruppen einteilen:There are already processes for regeneration known from sooty surfaces and filters become this task on thermal, carry out by chemical or mechanical means. These can be divided into 4 groups:

  • a) Durch Erhöhung der Temperatur des ruß­ beladenen Abgases wird dieser abgebrannt,a) By increasing the temperature of the soot loaded exhaust gas is burned off,
  • b) Widerstandsheizdrähte entzünden den Ruß örtlich,b) Resistance heating wires ignite the soot locally,
  • c) durch das Einwirken eines oder mehrerer Oxidationsmittel wird der Ruß unterhalb seiner eigentlichen Zündtemperatur abgebrannt,c) by the action of one or more The soot is oxidizing agent below its actual ignition temperature burned down,
  • d) der anhaftende Ruß wird durch Flüssig­ keiten oder Erschütterungen der Fläche oder des Filters von diesen entfernt.d) the adhering soot becomes liquid or vibrations of the surface or the filter away from them.

Alle diese bereits bekannten Verfahren sind sehr kostenintensiv. Dieser Umstand wird bei den genannten Verfahren a und b durch den er­ heblichen Mehrverbrauch an Energie verursacht, wobei sich die genannten Verfahren c und d durch enormen technologischen Mehraufwand auszeichnen.All of these methods are already known very expensive. This fact is considered the mentioned methods a and b by which he causes considerable additional energy consumption, whereby said methods c and d differ distinguish enormous technological overhead.

Der Erfindung liegt die Aufgabe zugrunde, mit Ruß behaftete Filter und Flächen mit geringen Leistungen und technologischem Aufwand zu re­ generieren.The invention is based, with Soot filters and areas with small Services and technological effort to re to generate.

Diese Aufgabe wird erfindungsmäßig dadurch ge­ löst, daß sich zwei oder mehrere Hochspannungs­ elekroden in oder auf dem mit Ruß behafteten Filter oder Flächen befinden. Bei Anlegen einer Hochspannung bildet der zwischen den Elektroden befindliche Ruß einen inhomogenen elektrischen Leiter. Aufgrund der Beschaffenheit der Ruß­ partikel kommt es zu punktuellen elektrischen Entladungen, die die thermische Zersetzung des Rußes gewährleisten. Die Hochspannungszufuhr kann je nach Betriebsbedingung, wie z. B. Ober­ flächenbeschaffenheit der Fläche oder des Filters sowie der Menge und der Eindringtiefe des Rußes, zyklisch oder permanent erfolgen. Anordnung, Anzahl und Geometrie der Hochspannungselektroden wird nach den anwendungsbezogenen Bedingungen aus­ gelegt. Es wird vorgeschlagen, in Keramikmonolith- oder Wickelfilter die Hochspannungselektroden als Rund- bzw. Flachmaterial oder als Drahtgewebe auf ganzer Länge (Fig. 1) oder dem des Umfanges (Fig. 2) des Filterkörpers ein- oder aufzubringen. This object is achieved according to the invention in that two or more high-voltage electrodes are located in or on the soot-laden filter or surfaces. When a high voltage is applied, the soot between the electrodes forms an inhomogeneous electrical conductor. Due to the nature of the soot particles, there are selective electrical discharges that ensure the thermal decomposition of the soot. The high voltage supply can, depending on the operating condition, such as. B. Upper surface quality of the surface or the filter and the amount and depth of penetration of the soot, cyclically or permanently. The arrangement, number and geometry of the high-voltage electrodes are designed according to the application-related conditions. It is proposed to insert or apply the high-voltage electrodes as a round or flat material or as wire mesh over the entire length ( FIG. 1) or that of the circumference ( FIG. 2) of the filter body in ceramic monolith or wound filters.

Auf Flächen wird das Aufbringen von Rund- bzw. Flachmaterial oder das Aufdampfen von metallischen Werkstoffen als Elektrode (Fig. 3) vorgeschlagen.The application of round or flat material or the vapor deposition of metallic materials as an electrode ( FIG. 3) is proposed on surfaces.

Claims (4)

1. Verfahren zur Regeneration rußbehafteter Flächen und Filter aus keramischen oder mineralischen Werkstoffen oder Beschichtungen, dadurch gekennzeichnet, daß der anhaftende Ruß einen inhomogenen elektrischen Leiter dar­ stellt und es bei Durchfluß einer Hochspannung zwischen den einzelnen Rußpartikeln zu elek­ trischen Entladungen kommt, die den Abbrand des Rußes zur Folge haben.1. A method for the regeneration of soot-laden surfaces and filters made of ceramic or mineral materials or coatings, characterized in that the adhering soot is an inhomogeneous electrical conductor and there is an electrical discharge when a high voltage flows between the individual soot particles, which burns the Result in soot. 2. Verfahren nach Anspruch 1, dadurch gekenn­ zeichnet, daß auf Flächen und Filter aus kera­ mischen oder mineralischen Werkstoffen oder Beschichtungen zwei oder mehrere Hochspannungs­ elektroden auf- oder eingebracht werden.2. The method according to claim 1, characterized records that on surfaces and filters from kera mix or mineral materials or Coatings two or more high voltage electrodes are applied or introduced. 3. Verfahren nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die Geometrie, die An­ zahl und der Abstand der Hochspannungselek­ troden zueinander nach Konzentration, Schicht­ dicke und Eindringtiefe des Rußes in den Filter­ körper oder auf die Fläche ausgelegt sind.3. The method according to claim 1 and 2, characterized characterized that the geometry, the An number and the distance of the high-voltage elec kick each other by concentration, shift thickness and depth of penetration of the soot into the filter body or on the surface. 4. Verfahren nach Anspruch 1 und 2, dadurch gekennzeichnet, daß das Anlegen der Hoch­ spannung zyklisch oder permanent erfolgt.4. The method according to claim 1 and 2, characterized characterized that putting on the high voltage is cyclical or permanent.
DE19873715174 1987-05-07 1987-05-07 Process for the regeneration of soot-coated surfaces and filters of ceramic or mineral materials or coatings Withdrawn DE3715174A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19873715174 DE3715174A1 (en) 1987-05-07 1987-05-07 Process for the regeneration of soot-coated surfaces and filters of ceramic or mineral materials or coatings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873715174 DE3715174A1 (en) 1987-05-07 1987-05-07 Process for the regeneration of soot-coated surfaces and filters of ceramic or mineral materials or coatings

Publications (1)

Publication Number Publication Date
DE3715174A1 true DE3715174A1 (en) 1988-11-24

Family

ID=6326993

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19873715174 Withdrawn DE3715174A1 (en) 1987-05-07 1987-05-07 Process for the regeneration of soot-coated surfaces and filters of ceramic or mineral materials or coatings

Country Status (1)

Country Link
DE (1) DE3715174A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT395827B (en) * 1990-08-13 1993-03-25 Fleck Carl M Process for burning aerosols, especially soot, contained in waste gases
DE4230631A1 (en) * 1992-09-12 1994-03-24 Amann & Soehne Process for removing electrically conductive particles from a gas stream and device for carrying out the process
FR2781690A1 (en) * 1998-08-03 2000-02-04 Ecia Equip Composants Ind Auto Device for regenerating a particle filter in a vehicle exhaust has electrical heater connected to source of electrical energy in the vehicle
WO2004004869A1 (en) * 2002-07-03 2004-01-15 Siemens Aktiengesellschaft Plasma particulate filter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT395827B (en) * 1990-08-13 1993-03-25 Fleck Carl M Process for burning aerosols, especially soot, contained in waste gases
DE4230631A1 (en) * 1992-09-12 1994-03-24 Amann & Soehne Process for removing electrically conductive particles from a gas stream and device for carrying out the process
FR2781690A1 (en) * 1998-08-03 2000-02-04 Ecia Equip Composants Ind Auto Device for regenerating a particle filter in a vehicle exhaust has electrical heater connected to source of electrical energy in the vehicle
WO2004004869A1 (en) * 2002-07-03 2004-01-15 Siemens Aktiengesellschaft Plasma particulate filter
US7326264B2 (en) 2002-07-03 2008-02-05 Siemens Aktiengesellschaft Plasma particulate filter

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