EP0758048A1 - Dispositif pour purifier resp. décomposer catalytiquement des gaz d'échappement chauds - Google Patents

Dispositif pour purifier resp. décomposer catalytiquement des gaz d'échappement chauds Download PDF

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Publication number
EP0758048A1
EP0758048A1 EP96108231A EP96108231A EP0758048A1 EP 0758048 A1 EP0758048 A1 EP 0758048A1 EP 96108231 A EP96108231 A EP 96108231A EP 96108231 A EP96108231 A EP 96108231A EP 0758048 A1 EP0758048 A1 EP 0758048A1
Authority
EP
European Patent Office
Prior art keywords
housing
housing part
parts
spacer element
exhaust gases
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.)
Granted
Application number
EP96108231A
Other languages
German (de)
English (en)
Other versions
EP0758048B1 (fr
Inventor
Rainer Diez
Volkmar Dipl.-Ing. Knipps
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.)
Friedrich Boysen GmbH and Co KG
Original Assignee
Friedrich Boysen GmbH and Co KG
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 Friedrich Boysen GmbH and Co KG filed Critical Friedrich Boysen GmbH and Co KG
Publication of EP0758048A1 publication Critical patent/EP0758048A1/fr
Application granted granted Critical
Publication of EP0758048B1 publication Critical patent/EP0758048B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
    • F01N3/2867—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing the mats or gaskets being placed at the front or end face of catalyst body
    • 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
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1888—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells
    • F01N13/1894—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells the parts being assembled in longitudinal direction
    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
    • F01N3/2857—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing the mats or gaskets being at least partially made of intumescent material, e.g. unexpanded vermiculite

Definitions

  • the invention relates to a device for the catalytic purification or decomposition of hot exhaust gases, in particular an internal combustion engine, with a tubular housing arranged or attachable in the exhaust gas flow and at least two catalyst bodies arranged axially one after the other in the housing and spaced apart by a spacer element.
  • Such devices are known for example from DE-A-40 24 015 and are used in practice in particular for cleaning the exhaust gases from motor vehicles.
  • the catalyst bodies which are encased on their outer circumference with a flexible covering such as an inflatable mat, and the spacer ring are inserted axially into the housing, a stamp-like tool serving as a stop at one end of the housing and the ones to be inserted into the housing Parts are pushed in and out one after the other from the other end of the housing by means of a further stamp.
  • a ceramic ring is used as the spacer element, which can be encased on its outer circumference by an expansion mat and is supported radially on the inner wall of the housing.
  • the end face of the ceramic ring lies tightly against the mutually facing end faces of the catalyst bodies, so that the expansion mats encasing the core ring and the catalyst bodies are shielded from the pulsations of the exhaust gases.
  • thermal insulation of the housing from the hot exhaust gases is achieved in this known arrangement, because the ceramic ring, in particular with it encasing inflatable mat offers a relatively good thermal shielding.
  • the arrangement of the ceramic ring or its production is comparatively expensive. This applies in particular if the housing is to have a cross-section deviating from the circular shape, for example an elliptical shape or the like.
  • the object of the invention is to provide a device for the catalytic cleaning or decomposition of hot exhaust gases of the type mentioned at the outset, which is of simple construction and in particular has a small number of individual components in the interior of the housing through which the exhaust gas flows.
  • the device should advantageously be designed so that it enables good thermal insulation in the region of the spacer element.
  • the housing has a first housing part for receiving the first catalyst body and a second housing part for receiving the second catalyst body and that the housing parts engage in a form-fitting manner on their mutually facing end faces and the end of the inner housing part as that Spacer element spacing the catalyst body is formed.
  • the inventive design of the spacer ring on the housing allows the number of individual components which are present in the space of the housing through which the hot exhaust gas flows, and thus simplify the construction of the device for catalytic cleaning.
  • the device according to the invention is installed in a simple manner by pushing the first catalyst body into the first housing part, then pushing the second housing part into the first housing part until the spacer element comes into contact with the first catalyst body and finally the second catalyst body into the second Housing part is inserted.
  • the housing is divided into two axially successive housing parts and each housing part receives a catalyst body, the way that the catalyst body must be inserted into the housing when assembling the device and thus the time required for the insertion process is low.
  • the spacer element can be integrally formed on the housing part by an additional shaping process in the manufacture of the corresponding housing part.
  • the housing and the spacer element are preferably designed in such a way that the spacer element can be molded onto the housing part during the operation in which the housing part is given its essentially freely selectable outer shape.
  • the molding of the spacer on a housing part does not require much effort and is inexpensive compared to the use of a ceramic ring.
  • the formation of the spacer on a sheet metal housing part has the further advantage that Spacer element can be made relatively elastic compared to spacer elements made of ceramic material, so that the spacer ring can easily nestle against the facing end faces of the catalyst body and also the different thermal expansions of the housing and the catalyst body can be compensated.
  • the spacer element is designed such that it forms a substantially closed annular space with the inner wall of the outer housing part, so that an air gap is formed between the flow space for the exhaust gas and the housing.
  • good thermal insulation of the housing can be achieved, especially since insulating material can also be arranged in the closed annular space.
  • the outer housing part is widened in its end region positively overlapping the inner housing part and the annular step of the outer housing part forming the transition to the widened end region is flat, i.e. formed with a slight inclination to the axial direction of the housing. This ensures that the insertion process of the inner housing part into the outer housing part in the area of the ring step is braked by bending the widened end region and thus the spacer element does not abut and damage the first catalyst body inserted into the outer housing part.
  • the device shown for the catalytic cleaning or decomposition of exhaust gases from an internal combustion engine has a housing 1 with a non-circular cross-section, which is connected at the end to an inlet funnel 2 and an outlet funnel 3, the inlet funnel 2 being connected to an engine, the inlet funnel 2 having a Exhaust line on the engine side and the outlet funnel 3 can be connected to an exhaust line leading to the atmosphere.
  • two catalyst bodies 5, 6, each encased by an inflatable mat 4 are arranged axially one after the other, which are spaced apart by a spacer 7, so that a space 8 is created between the catalyst bodies 5, 6, in which the by Inlet funnel 2 entering and passing through the first catalyst body 5 exhaust gases can mix before entering the second catalyst body 6.
  • the housing 1 is formed in two parts and comprises a first housing part 9, in which the first catalyst body 5 is arranged, and a second housing part 10, in which the second catalyst body 6 is arranged.
  • the two housing parts 9, 10 engage on their facing one another The end faces are interlocking and are welded together.
  • the first housing part 9 has an end region 11 which is widened to such an extent that the second housing part 10 can be pushed into the first housing part 9 in a positive manner.
  • the end of the second housing part 10 which engages in the first housing part 9 is designed as the spacer element 7 spacing the catalyst bodies 5, 6 and bears against the end faces of the catalyst bodies 5, 6.
  • the spacer element 7 is designed as an annular element and molded onto the second housing part 10 and forms with the inner wall of the first housing part 9 an air-filled annular space 12 between the area through which the hot exhaust gases flow and the housing wall, as a result of which there is good thermal insulation of the housing 1 the hot exhaust gases is guaranteed.
  • the annular space 12 can additionally be filled with a heat-insulating material in order to increase the insulation effect.
  • the inner diameter of the spacer element 7 is only slightly smaller than the outer diameter of the catalyst bodies 5, 6, so that their facing end faces are only slightly overlapped by the spacer element 7 and the entire cross section of the catalyst bodies 5, 6 is largely available for the exhaust gases flowing through.
  • the inlet and outlet funnels 2, 3 are each double-walled with outer parts 2 ', 3' and inner parts 2 '', 3 '', between which an air gap is free for thermal insulation remains, which may be filled with a heat insulating material.
  • the outer part 2 'of the inlet funnel 2 is welded to the outer surface of the first housing part 9, and the inner part 2' 'is plugged onto the inlet-side end 14 of the housing part 9, which has a reduced diameter and forms a sliding seat with it.
  • the outlet funnel 3 is fastened to the second housing part 10. Since the second housing part 10 has no reduced diameter at its end on the outlet funnel side, the outer part 3 'of the outlet funnel 3 is shaped such that it overlaps the inner part 3' 'which forms a sliding seat with the second housing part 10.
  • ring elements 13 made of knitted steel wire. These ring elements 13 also protect the edges of the catalyst bodies 5, 6 against damage.
  • the device according to the invention for the catalytic cleaning or decomposition of hot exhaust gases is assembled as follows:
  • the two catalyst bodies 5, 6 are pushed axially into the first housing part 9 with the associated expansion mats 4 with stamp-like tools, the shoulder 15 leading to the end 14 of reduced diameter of the first housing part 9 and the spacer 7 provided on the end face of the second housing part 10 as stops.
  • the inflatable mats 4 should be shielded from pulsations of the exhaust gases, since these pulsations would destroy the inflatable mats 4 in the long term. For this reason, the catalyst bodies 5, 6 and the second housing part 10 are pushed against one another with sufficient axial pressure, in such a way that the spacer element 7 lies sealingly against the mutually facing end faces of the catalyst bodies 5, 6.
  • the catalyst bodies 5, 6 are only fixed in the housing parts 9, 10 during operation by the expansion mats 4 swelling under the action of heat from the exhaust gases.
  • the second housing part 10 is pushed into the first housing part 9 until it abuts the first catalyst body 5 or the ring element 9 provided thereon, the flat ring step of the first housing part 9 forming the transition to the widened end region 11 slowing down the insertion process, so that the spacer 7 can not abut the first catalyst body 5 and damage it.
  • the outlet funnel 3 is then pushed onto the second housing part 10 until the inner part 3 ′′ of the outlet funnel 3 comes into contact with the catalyst body 6, and is then welded to the housing part 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Catalysts (AREA)
  • Incineration Of Waste (AREA)
EP96108231A 1995-08-07 1996-05-23 Dispositif pour purifier resp. décomposer catalytiquement des gaz d'échappement chauds Expired - Lifetime EP0758048B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19528947 1995-08-07
DE19528947A DE19528947A1 (de) 1995-08-07 1995-08-07 Vorrichtung zur katalytischen Reinigung bzw. Zerlegung von heißen Abgasen

Publications (2)

Publication Number Publication Date
EP0758048A1 true EP0758048A1 (fr) 1997-02-12
EP0758048B1 EP0758048B1 (fr) 1999-04-28

Family

ID=7768870

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96108231A Expired - Lifetime EP0758048B1 (fr) 1995-08-07 1996-05-23 Dispositif pour purifier resp. décomposer catalytiquement des gaz d'échappement chauds

Country Status (4)

Country Link
EP (1) EP0758048B1 (fr)
AT (1) ATE179490T1 (fr)
DE (2) DE19528947A1 (fr)
ES (1) ES2130716T3 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001079668A1 (fr) * 2000-04-15 2001-10-25 Volkswagen Aktiengesellschaft Procede et dispositif pour fabriquer un catalyseur monolithique de section polygonale
EP1361347A1 (fr) * 2002-04-22 2003-11-12 J. Eberspächer GmbH & Co. KG Convertisseur catalytique pour un moteur à combustion interne
WO2006061526A1 (fr) * 2004-12-10 2006-06-15 Faurecia Systemes D'echappement Dispositif de depollution des gaz d'echappement d'un moteur thermique
FR2925578A1 (fr) * 2007-12-21 2009-06-26 Faurecia Sys Echappement Dispositif de depollution de gaz d'echappement de vehicule automobile a moteur thermique
US20110256032A1 (en) * 2010-04-15 2011-10-20 J. Eberspaecher Gmbh & Co. Kg Exhaust Gas Treatment Device
US8535611B2 (en) 2008-08-08 2013-09-17 Komatsu Ltd. Exhaust gas purifying device
EP3098410A1 (fr) * 2015-05-28 2016-11-30 Renault S.A.S. Système de dépollution compact d'un véhicule

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10133960A1 (de) * 2001-07-18 2003-03-06 Eberspaecher J Gmbh & Co Verbindung einer Rohrleitung an einem Abgas-Gehäuseteil eines Kraftfahrzeuges
DE10358504B4 (de) * 2003-12-13 2006-02-23 Daimlerchrysler Ag Verfahren zur Herstellung eines Katalysatorgehäuses

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0263893A1 (fr) * 1986-10-16 1988-04-20 W.R. Grace & Co. Boîtier pour des éléments catalyseurs et convertisseur catalytique
DE8811086U1 (de) * 1988-09-01 1988-10-20 Emitec Gesellschaft für Emissionstechnologie mbH, 53797 Lohmar Trägerkörper für einen katalytischen Reaktor zur Abgasreinigung
DE8812762U1 (de) * 1988-10-11 1989-06-29 Emitec Gesellschaft für Emissionstechnologie mbH, 5204 Lohmar Katalysator mit Doppelmantelsystem
DE4024015A1 (de) * 1990-07-28 1992-02-06 Boysen Friedrich Gmbh Co Kg Vorrichtung zur katalytischen reinigung bzw. zerlegung von heissen abgasen
EP0693616A1 (fr) * 1994-07-22 1996-01-24 Friedrich Boysen GmbH & Co. KG Dispositif pour la purification ou la décomposition de gaz d'échappement chauds

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0263893A1 (fr) * 1986-10-16 1988-04-20 W.R. Grace & Co. Boîtier pour des éléments catalyseurs et convertisseur catalytique
DE8811086U1 (de) * 1988-09-01 1988-10-20 Emitec Gesellschaft für Emissionstechnologie mbH, 53797 Lohmar Trägerkörper für einen katalytischen Reaktor zur Abgasreinigung
DE8812762U1 (de) * 1988-10-11 1989-06-29 Emitec Gesellschaft für Emissionstechnologie mbH, 5204 Lohmar Katalysator mit Doppelmantelsystem
DE4024015A1 (de) * 1990-07-28 1992-02-06 Boysen Friedrich Gmbh Co Kg Vorrichtung zur katalytischen reinigung bzw. zerlegung von heissen abgasen
EP0693616A1 (fr) * 1994-07-22 1996-01-24 Friedrich Boysen GmbH & Co. KG Dispositif pour la purification ou la décomposition de gaz d'échappement chauds

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001079668A1 (fr) * 2000-04-15 2001-10-25 Volkswagen Aktiengesellschaft Procede et dispositif pour fabriquer un catalyseur monolithique de section polygonale
EP1361347A1 (fr) * 2002-04-22 2003-11-12 J. Eberspächer GmbH & Co. KG Convertisseur catalytique pour un moteur à combustion interne
US7384613B2 (en) 2002-04-22 2008-06-10 J. Eberspacher Gmbh & Co. Kg Catalyst for an internal combustion engine
WO2006061526A1 (fr) * 2004-12-10 2006-06-15 Faurecia Systemes D'echappement Dispositif de depollution des gaz d'echappement d'un moteur thermique
FR2879240A1 (fr) * 2004-12-10 2006-06-16 Faurecia Sys Echappement Dispositif de depollution des gaz d'echappement d'un moteur thermique
FR2925578A1 (fr) * 2007-12-21 2009-06-26 Faurecia Sys Echappement Dispositif de depollution de gaz d'echappement de vehicule automobile a moteur thermique
US8535611B2 (en) 2008-08-08 2013-09-17 Komatsu Ltd. Exhaust gas purifying device
US20110256032A1 (en) * 2010-04-15 2011-10-20 J. Eberspaecher Gmbh & Co. Kg Exhaust Gas Treatment Device
EP3098410A1 (fr) * 2015-05-28 2016-11-30 Renault S.A.S. Système de dépollution compact d'un véhicule
FR3036733A1 (fr) * 2015-05-28 2016-12-02 Renault Sa Systeme de depollution compact d'un vehicule

Also Published As

Publication number Publication date
ATE179490T1 (de) 1999-05-15
ES2130716T3 (es) 1999-07-01
EP0758048B1 (fr) 1999-04-28
DE19528947A1 (de) 1997-02-13
DE59601755D1 (de) 1999-06-02

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