DE102011007941A1 - Method for cleaning diesel exhaust gas particulate filter of diesel engine that is utilized for driving passenger car, involves pressing end of supplying unit on end of exhaust pipe such that filter is kept under specific pressure - Google Patents

Method for cleaning diesel exhaust gas particulate filter of diesel engine that is utilized for driving passenger car, involves pressing end of supplying unit on end of exhaust pipe such that filter is kept under specific pressure Download PDF

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DE102011007941A1
DE102011007941A1 DE201110007941 DE102011007941A DE102011007941A1 DE 102011007941 A1 DE102011007941 A1 DE 102011007941A1 DE 201110007941 DE201110007941 DE 201110007941 DE 102011007941 A DE102011007941 A DE 102011007941A DE 102011007941 A1 DE102011007941 A1 DE 102011007941A1
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filter
liquid
cleaning
carrier gas
exhaust pipe
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DE201110007941
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German (de)
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Anmelder Gleich
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Priority to DE201110007941 priority Critical patent/DE102011007941A1/en
Priority to PCT/EP2011/074089 priority patent/WO2012089730A1/en
Priority to ES11802954.5T priority patent/ES2545406T3/en
Priority to EP11802954.5A priority patent/EP2629877B1/en
Publication of DE102011007941A1 publication Critical patent/DE102011007941A1/en
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    • 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
    • F01N3/0237—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 for regenerating ex situ
    • 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
    • F01N3/0233—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 periodically cleaning filter by blowing a gas through the filter in a direction opposite to exhaust flow, e.g. exposing filter to engine air intake
    • 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
    • F01N3/0238—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 for regenerating during engine standstill

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  • 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)

Abstract

The method involves introducing an additive containing soot-decomposing liquid and a carrier gas i.e. pressurized air, from an end side of an exhaust pipe (4) into a filter (1) i.e. diesel exhaust gas particulate filter, by a stream supplying unit (2) and an inlet pipe (3), respectively under pressure, where boiling point of the liquid is lesser than 180 degree Celsius. An end of the stream supplying unit is pressed or attached firmly on the end of the exhaust pipe by a bracket (5) such that the filter is kept under pressure of about 0.10-1 bar, where the filter is freed by a suction device.

Description

Fahrzeuge und Arbeitsmaschinen, die durch Dieselmotoren angetrieben werden, müssen mit einem Abgaspartikelfilter ausgestattet werden. Der heutige Standard wird mit EURO 5 bezeichnet, die nächste Stufe wird mit EURO 6 bezeichnet und in Kürze eingeführt. Trotz vieler technischer Fortschritte besteht für diese Filter ein Reinigungsbedarf. Der Reinigungsbedarf wird umso höher, je mehr Kurzstrecken gefahren werden. Der Dieselmotor erreicht auf diesen Strecken dann nicht die Temperaturen, die eine Verbrennung der Abgaspartikel, zumeist Ruß, gewährleisten. Zwecks Reinigung muss der Filter bisher aufwendig aus- und wieder eingebaut werden. Wenn kein Austauschfilter zur Verfügung steht, steht das Fahrzeug/die Maschine während der gesamten Reinigungsprozedur. Da Filter von ca. EUR 2000,00–EUR 8000,00 kosten, ist das Vorhalten von Austauschfiltern auch sehr kostspielig.Vehicles and work machines that are powered by diesel engines must be equipped with an exhaust particulate filter. Today's standard is called EURO 5, the next level is called EURO 6 and will be introduced shortly. Despite many technical advances, these filters require cleaning. The need for cleaning becomes higher, the more short distances are driven. The diesel engine then does not reach the temperatures on these routes, which ensure combustion of the exhaust particles, usually soot. For the purpose of cleaning, the filter has hitherto to be effortlessly removed and reinstalled. If no replacement filter is available, the vehicle / machine stands during the entire cleaning procedure. Since filters cost from about EUR 2000.00-EUR 8000.00, the provision of replacement filters is also very expensive.

Die Reinigung der Filter wird zumeist durchgeführt, in dem die Filter nach dem Ausbau aus dem Fahrzeug/der Maschine in einem geeigneten Ofen bis auf ca. 600° erhitzt werden, um den Ruß zu verbrennen. Hierbei kommt es oft zu einem Verzug des Filtergehäuses, dass den Wiedereinbau erschwert. Die im Filter verbleibende Asche wird nach dem Brennvorgang z. B. mit Druckluft ausgeblasen. Hierfür muss der Filter zumindest im Bereich der Filter von Personenkraftwagen oft vorher getrennt werden, um eine Düse auf die Filterflächen richten zu können. Das Verfahren ist aufwändig, oft sind mehrere Brenn- und Ausblasgänge erforderlich, um einen akzeptablen Reinigungserfolg zu erzielen. Das kann alles in allem dann bis zu zwei Tagen pro Filter dauern. Eine weitere Möglichkeit ist die Reinigung mit Wasser. Auch diese Reinigungsmethode kann langwierig sein, zudem besteht bei beschichteten Filtern die Gefahr der Reduzierung der Katalyseeigenschaften. Zudem ist das Wasser aufwendig zu entsorgen oder zu reinigen.The cleaning of the filters is usually carried out by heating the filters after removal from the vehicle / machine in a suitable oven to about 600 ° to burn the soot. This often leads to a distortion of the filter housing that makes re-installation difficult. The remaining ash in the filter is z. B. blown out with compressed air. For this purpose, the filter must be separated at least in the field of filters of passenger cars often before to be able to direct a nozzle on the filter surfaces. The process is complex, often several combustion and Ausblasgänge are required to achieve an acceptable cleaning success. All in all, this can take up to two days per filter. Another option is to clean with water. Also, this cleaning method can be tedious, there is also the risk of reducing the Katalyseeigenschaften coated filters. In addition, the water is expensive to dispose of or to clean.

Ziel und Zweck der Erfindung ist ein Verfahren zur Reinigung von Filter vorzugsweise in noch eingebautem Zustand, dass kein Brennverfahren mit hohen Temperaturen erfordert, einen sehr guten Reinigungseffekt aufweist und wirtschaftlich und schnell arbeitet.The aim and purpose of the invention is a method for cleaning filters, preferably in a still installed state, which does not require a high temperature firing process, has a very good cleaning effect and works economically and quickly.

Zu diesem Zweck wird eine Flüssigkeit, die mit Zusätzen versehen sein kann, unter Druck in den Filter 1 eingebracht, wobei der Filter 1 durch die Motorabgase zuvor vorzugsweise über den Siedepunkt der Flüssigkeit erwärmt sein wird. Die Einbringung in den heißen Filter 1 erfolgt vorzugsweise durch ein Strahlverfahren mittels eines durch die Zuleitung 2 unter Druck zugeführten Trägergases, z. B. Druckluft, dem die Flüssigkeit durch die Zuleitung 3 unter Druck oder durch Ansaugung zugesetzt wird. Die Trägergasmenge mit der zugesetzten Flüssigkeit wird dabei durch das Auspuffrohr 4 in so großem Volumen zugeführt, dass der gesamte Filter 1 kurzzeitig unter einen Druck von min. 0,10 bar gesetzt wird. Die Zuführungsleitung 2 des Trägergases wird dabei vorzugsweise fest vor das Ende des Auspuffrohres 4 gepresst bzw. mit diesem fest, z. B. durch eine Schelle 5 verbunden. Kennzeichnend für die eingesetzte Flüssigkeit ist eine rußzersetzende Wirkung und ein Siedepunkt unter 180° zumindest für die Hauptkomponente. Ein Teil der eingebrachten Flüssigkeit verdampft bereits bei der Einbringung. Die Filtertemperatur kühlt sich durch die kurzzeitige Einbringung nur an den direkten Kontaktstellen unter den Siedepunkt der Flüssigkeit ab, anschließend erfolgt durch die Nachwärme der gesamten Filtermasse wieder ein Temperaturanstieg über den Siedepunkt der Flüssigkeit, die anschließend komplett verdampft. Durch den durch die Nachwärme bedingten relativ langsamen Temperaturanstieg innerhalb des Filters 1 wird eine kurze Einwirkzeit der Flüssigkeit erreicht bis zur folgenden Verdampfung der Flüssigkeit. Überraschenderweise hat sich bei Versuchen ergeben, dass der in der Flüssigkeit gelöste Ruß bereits bei Temperaturen oberhalb des Siedepunktes der Flüssigkeit zusammen mit der Flüssigkeit verdampft und damit aus dem Filter 1 ausgetragen wird, obwohl die Verbrennungstemperatur von Ruß weitaus höher, bei ca. 600° liegt.For this purpose, a liquid, which may be provided with additives, under pressure into the filter 1 introduced, the filter 1 is preferably previously heated by the engine exhaust above the boiling point of the liquid. The introduction into the hot filter 1 is preferably carried out by a blasting process by means of a through the supply line 2 pressurized carrier gas, e.g. B. compressed air, the liquid through the supply line 3 is added under pressure or by suction. The amount of carrier gas with the added liquid is through the exhaust pipe 4 supplied in such a large volume that the entire filter 1 briefly under a pressure of min. 0.10 bar is set. The supply line 2 The carrier gas is preferably fixed in front of the end of the exhaust pipe 4 pressed or fixed with this, z. B. by a clamp 5 connected. Characteristic of the liquid used is a Rußzersetzende effect and a boiling point below 180 ° at least for the main component. Some of the introduced liquid evaporates already during the introduction. The filter temperature is cooled by the brief introduction only at the direct contact points below the boiling point of the liquid, then followed by the residual heat of the entire filter mass again a temperature increase above the boiling point of the liquid, which then completely evaporated. Due to the residual heat caused by the relatively slow increase in temperature within the filter 1 a short exposure time of the liquid is achieved until the subsequent evaporation of the liquid. Surprisingly, it has been found in experiments that the carbon black dissolved in the liquid evaporates at temperatures above the boiling point of the liquid together with the liquid and thus from the filter 1 is discharged, although the combustion temperature of soot is much higher, at about 600 °.

Claims (5)

Reinigungsverfahren für Dieselabgaspartikelfilter ohne Ausbau des Filters 1, der vor der Reinigungsbehandlung vorzugsweise durch die Motorabgase auf eine Temperatur oberhalb des Siedepunktes der einzubringenden Flüssigkeit erhitzt wird, gekennzeichnet durch die Einbringung einer rußzersetzenden Flüssigkeit, der auch Zusätze beigefügt werden können, in den Filter 1 mittels durch die Zuführung 2 unter Druck zugeführten Trägergases, wobei die Flüssigkeit zumindest in der Hauptkomponente einen Siedepunkt von weniger als 180° aufweist. Die Zuführung des Trägergases und der Flüssigkeit erfolgt ausschließlich von der Endseite des Auspuffrohres 4 her, wobei das Ende der Strahlzuführung 2 fest auf das Ende des Auspuffrohres 4 gepresst oder fest, z. B. mittels einer Schelle 5, angeschlossen wird und der gesamte Filter 1 kurzzeitig unter einen Druck von min. 0,10 bar, vorzugsweise von mehr als 1 bar gesetzt wird.Cleaning process for diesel exhaust particulate filter without removing the filter 1 , which is preferably heated by the engine exhaust gases to a temperature above the boiling point of the liquid to be introduced before the cleaning treatment, characterized by the introduction of a soot-decomposing liquid, which may also be added additives, in the filter 1 by means of the feeder 2 under pressure supplied carrier gas, wherein the liquid has a boiling point of less than 180 ° at least in the main component. The supply of the carrier gas and the liquid takes place exclusively from the end side of the exhaust pipe 4 ago, the end of the beam feed 2 firmly on the end of the exhaust pipe 4 pressed or firm, z. B. by means of a clamp 5 , is connected and the entire filter 1 briefly under a pressure of min. 0.10 bar, preferably of more than 1 bar is set. Reinigungsverfahren nach Anspruch 1, dadurch gekennzeichnet, dass das in den Filter 1 eingebrachte Trägergas und die eingebrachte Flüssigkeit nur in einer Menge eingebracht werden, dass die Kontaktstellen im Filter 1 nur soweit abkühlen, dass die restliche Flüssigkeit samt eventuell noch darin enthaltener Verschmutzungen anschließend durch die Nachwärme der Filtermasse zumindest weitestgehend verdampft bzw. verdunstet.Cleaning method according to claim 1, characterized in that in the filter 1 introduced carrier gas and the introduced liquid can be introduced only in such an amount that the contact points in the filter 1 Cool only to the extent that the remaining liquid, together with any contaminants still contained therein, is then at least largely evaporated or evaporated by the residual heat of the filter mass. Reinigungsverfahren nach Anspruch 1–2, dadurch gekennzeichnet, dass das eingesetzte Trägergas Druckluft ist Cleaning method according to claim 1-2, characterized in that the carrier gas used is compressed air Reinigungsverfahren nach Anspruch 1–3, dadurch gekennzeichnet, dass das Trägergas vor Einbringung in den Filter 1 erhitzt wird auf eine Temperatur unterhalb des Siedepunktes der zugesetzten FlüssigkeitCleaning method according to claim 1-3, characterized in that the carrier gas prior to introduction into the filter 1 is heated to a temperature below the boiling point of the added liquid Reinigungsverfahren für Dieselabgaspartikelfilter nach Anspruch 1–4, dadurch gekennzeichnet, dass der Filter 1 nach der Reinigung von der Auspuffseite her mittels einer geeigneten Absaugvorrichtung von eventuell noch vorhandenen kleinen Restverschmutzungen befreit wird.Cleaning process for diesel exhaust particulate filter according to claim 1-4, characterized in that the filter 1 after cleaning from the exhaust side is freed by means of a suitable suction device of any remaining small residual dirt.
DE201110007941 2010-12-28 2011-01-03 Method for cleaning diesel exhaust gas particulate filter of diesel engine that is utilized for driving passenger car, involves pressing end of supplying unit on end of exhaust pipe such that filter is kept under specific pressure Withdrawn DE102011007941A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE201110007941 DE102011007941A1 (en) 2011-01-03 2011-01-03 Method for cleaning diesel exhaust gas particulate filter of diesel engine that is utilized for driving passenger car, involves pressing end of supplying unit on end of exhaust pipe such that filter is kept under specific pressure
PCT/EP2011/074089 WO2012089730A1 (en) 2010-12-28 2011-12-27 Process for cleaning particulate filters
ES11802954.5T ES2545406T3 (en) 2010-12-28 2011-12-27 Procedure for cleaning particulate filters
EP11802954.5A EP2629877B1 (en) 2010-12-28 2011-12-27 Process for cleaning particulate filters

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DE201110007941 DE102011007941A1 (en) 2011-01-03 2011-01-03 Method for cleaning diesel exhaust gas particulate filter of diesel engine that is utilized for driving passenger car, involves pressing end of supplying unit on end of exhaust pipe such that filter is kept under specific pressure

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DE102011007941A1 true DE102011007941A1 (en) 2012-07-05

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DE201110007941 Withdrawn DE102011007941A1 (en) 2010-12-28 2011-01-03 Method for cleaning diesel exhaust gas particulate filter of diesel engine that is utilized for driving passenger car, involves pressing end of supplying unit on end of exhaust pipe such that filter is kept under specific pressure

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60101018T2 (en) * 2000-06-08 2004-08-12 Peugeot Citroen Automobiles S.A. Motor vehicle with a particle filter arranged in the engine compartment and method and system for cleaning the particle filter
DE102004029640A1 (en) * 2004-06-18 2006-01-12 Ernst-Friedhelm Barten Cleaning particulate filter, especially for diesel engine, comprises burning combustible substances and loosening resulting ash by mechanical vibration
DE102009025598A1 (en) * 2009-06-19 2010-12-23 Tunap Industrie Chemie Gmbh & Co. Produktions Kg Method and device for cleaning particulate filters in exhaust systems of internal combustion engines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60101018T2 (en) * 2000-06-08 2004-08-12 Peugeot Citroen Automobiles S.A. Motor vehicle with a particle filter arranged in the engine compartment and method and system for cleaning the particle filter
DE102004029640A1 (en) * 2004-06-18 2006-01-12 Ernst-Friedhelm Barten Cleaning particulate filter, especially for diesel engine, comprises burning combustible substances and loosening resulting ash by mechanical vibration
DE102009025598A1 (en) * 2009-06-19 2010-12-23 Tunap Industrie Chemie Gmbh & Co. Produktions Kg Method and device for cleaning particulate filters in exhaust systems of internal combustion engines

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