EP0121175A1 - Support de catalyseur en rubans en tôle à enroulement hélicoidal conique pour moteurs à combustion interne - Google Patents

Support de catalyseur en rubans en tôle à enroulement hélicoidal conique pour moteurs à combustion interne Download PDF

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Publication number
EP0121175A1
EP0121175A1 EP84103016A EP84103016A EP0121175A1 EP 0121175 A1 EP0121175 A1 EP 0121175A1 EP 84103016 A EP84103016 A EP 84103016A EP 84103016 A EP84103016 A EP 84103016A EP 0121175 A1 EP0121175 A1 EP 0121175A1
Authority
EP
European Patent Office
Prior art keywords
matrix
metal strips
supporting matrix
width
combustion engines
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
EP84103016A
Other languages
German (de)
English (en)
Other versions
EP0121175B1 (fr
Inventor
Theodor Dipl.-Ing. Cyron
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.)
Interatom Internationale Atomreaktorbau GmbH
Original Assignee
Interatom Internationale Atomreaktorbau GmbH
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 Interatom Internationale Atomreaktorbau GmbH filed Critical Interatom Internationale Atomreaktorbau GmbH
Priority to AT84103016T priority Critical patent/ATE25128T1/de
Publication of EP0121175A1 publication Critical patent/EP0121175A1/fr
Application granted granted Critical
Publication of EP0121175B1 publication Critical patent/EP0121175B1/fr
Expired 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
    • F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
    • 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
    • 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
    • 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
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2807—Metal other than sintered metal
    • F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
    • 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
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2807—Metal other than sintered metal
    • F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
    • F01N3/2821—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates the support being provided with means to enhance the mixing process inside the converter, e.g. sheets, plates or foils with protrusions or projections to create turbulence
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/02—Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated or otherwise deformed sheet metal

Definitions

  • the present invention relates to a metallic carrier body for coatings of catalytically active substances for cleaning exhaust gases, in particular for internal combustion engines.
  • These metallic catalyst carrier bodies consist of a carrier matrix with spirally wound, very thin-walled, smooth and / or corrugated metal strips, which are joined together in a circular-cylindrical or oval-cylindrical jacket tube by welding, soldering or adhesive bonding.
  • German laid-open specification 29 05 241 describes a catalyst carrier body made of a conical winding, which is intended to improve the known cylindrical windings with regard to the flow, the heat load, the light-off behavior and the ability to be installed.
  • This document relates to winding bodies in the normal and widely used dimensions and at no point attaches the necessary evaluation to the solution of the pending, however not considered thermal expansion problems in the radial direction to the diameter-length ratio. Accordingly, with the solution proposed there, as in the following set out in detail, the aforementioned alternating load breakage risk has not been eliminated.
  • the object of the present invention is a catalyst carrier body made of smooth and / or corrugated, spirally wound and joined in a casing tube sheet metal strips, which avoids the disadvantages mentioned above.
  • a catalyst body according to the first claim is proposed.
  • the ratio of the width of the sheet metal strips to the pitch or the outer radius of the helical winding should be chosen such that no cross section through the winding cuts all layers of sheet metal strips, i.e. the axial_ dimension of the hollow-cone-like carrier matrix is greater than twice the width of the sheet metal strips.
  • a catalyst carrier body designed in this way has the advantage that each cross section perpendicular to the longitudinal axis has only relatively narrow ring zones made of carrier matrix cells, which in the radial direction are not hampered by neighboring cells in the radial direction both outwards and inwards, and are therefore not subject to any plastic alternating deformations as in the case of the previous carrier bodies.
  • the carrier matrix should have a truncated cone shape. If the height of the hollow truncated cone is still greater than twice the width of the winding tape, the advantages described so far are retained, so that the inner part can expand without being obstructed by the casing tube.
  • the catalyst carrier body is W-shaped in longitudinal section. This shape results when the slope changes its sign at one point during the winding of the helical winding. If, in this case as well, the total axial extent of the helical winding exceeds twice the width of the winding tapes, the advantages described are retained. With this arrangement, which is particularly suitable for catalyst bodies of larger diameter, the installation dimensions are considerably reduced compared to the normal-conical shape, without restricting the flexibility of the matrix with regard to the freedom from expansion.
  • the Shapes of the carrier matrix described so far can be produced by initially winding them and then pressing them into the desired shape.
  • the carrier body should consist of a plurality of matrix sections arranged axially one behind the other with a clearance. Because of the narrower width of the winding tapes in accordance with the present invention, it may be that several matrix sections are necessary for adequate catalysis. The division of the total length of the catalytic converter into several narrow sections with free spaces in between leads to a further advantage in another respect. Calculations and tests have shown that with the usual dimensions and gas velocities in the parallel channels of the previous catalytic converters, the flow changes to the laminar state after about 20-30 mm, which is due to the lack of surface contacting for the chemical processes taking place in a catalytic converter of the exhaust gas is less favorable than a turbulent flow.
  • each partial catalyst portion Due to the division into a plurality of partial catalyst bodies arranged one behind the other in the flow direction, each partial catalyst portion is only flowed through in the turbulent state / which considerably improves the catalytic efficiency.
  • the exhaust gas exits the previous catalyst section into the intermediate space to the next section, the exhaust gas is mixed very well, which also contributes to improving the catalytic efficiency in terms of heat distribution, light-off behavior and conversion rate.
  • the cone-like shape of the catalyst body proposed in the first claim flow direction of the hot exhaust gas is opposite.
  • the hot exhaust gases are diverted from the center a little more than before to the peripheral areas of the catalyst body, so that the hot gases are distributed more uniformly than previously over the cross section of the catalyst body will.
  • the conical catalyst carrier body 1 are attached in triplicate in the cylindrical jacket tube 2, which is connected via conical transition pieces 3 and 5 to the cylindrical pipe socket 4 and 6.
  • the arrow on the pipe socket 4 shows the direction of flow of the incoming exhaust gas. It can be seen that the flow is distributed over the entire cross section of the catalyst body due to the conical shape and due to the resistance in the catalyst body.
  • the catalyst bodies are wound in a manner known per se from a smooth 8 and a corrugated 7 sheet metal strip, the outer layer of a corrugated sheet metal strip, for example, abutting the inner surface of the casing tube 2.
  • the sheet metal strips are wound comparatively narrow and helically.
  • the width b of the metal strips and the pitch s of the helical winding, and the overall axial extent h of the helical windings are shown in FIG. 1. It can be seen that a cut perpendicular to the longitudinal axis of the catalyst carrier body can only cut all winding layers if the axial dimension h is more than twice as large as the width of the winding tapes b.
  • FIG. 3 and 4 show further embodiments for the exhaust gas catalyst carrier body.
  • 3 shows a frustoconical support matrix 9 and
  • FIG. 4 shows a W-shaped shape 10. Viewed axially, these designs look as shown in FIG. 2.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Catalysts (AREA)
  • Exhaust Gas After Treatment (AREA)
EP84103016A 1983-03-30 1984-03-19 Support de catalyseur en rubans en tôle à enroulement hélicoidal conique pour moteurs à combustion interne Expired EP0121175B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84103016T ATE25128T1 (de) 1983-03-30 1984-03-19 Katalysator-traegerkoerper fuer verbrennungskraftmaschinen aus konisch wendelfoermig gewickelten blechstreifen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833311724 DE3311724A1 (de) 1983-03-30 1983-03-30 Katalysator-traegerkoerper fuer verbrennungskraftmaschinen aus konisch wendelfoermig gewickelten blechstreifen
DE3311724 1983-03-30

Publications (2)

Publication Number Publication Date
EP0121175A1 true EP0121175A1 (fr) 1984-10-10
EP0121175B1 EP0121175B1 (fr) 1987-01-21

Family

ID=6195175

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84103016A Expired EP0121175B1 (fr) 1983-03-30 1984-03-19 Support de catalyseur en rubans en tôle à enroulement hélicoidal conique pour moteurs à combustion interne

Country Status (3)

Country Link
EP (1) EP0121175B1 (fr)
AT (1) ATE25128T1 (fr)
DE (2) DE3311724A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3638082A1 (de) * 1986-11-07 1988-05-11 Interatom Abgasleitung mit hohlkegelfoermigen katalysatortraegerkoerpern
US5328774A (en) * 1990-08-06 1994-07-12 Emitec Gesellschaft Fur Emissionstechnologie Mbh Monolithic metal honeycomb body with varying number of channels
EP1215374A1 (fr) * 2000-12-14 2002-06-19 Detroit Diesel Corporation Dispositif comprenant un catalyseur pour contrôler les émissions pour un moteur de véhicule automobile
CN1098410C (zh) * 1997-11-07 2003-01-08 发射技术有限公司 带有外露热辐射面的催化剂载体
EP2221098B2 (fr) † 2009-02-16 2015-03-18 NGK Insulators, Ltd. Structure en nid d'abeille

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3444472C1 (de) * 1984-12-06 1986-02-13 Daimler-Benz Ag, 7000 Stuttgart Abgasfilter fuer Dieselmotoren
DE3543011A1 (de) * 1985-12-05 1987-06-11 Sueddeutsche Kuehler Behr Matrix fuer einen katalysator
ES2010687B3 (es) * 1986-05-12 1989-12-01 Interatom Ges Mit Beschrankter Haftung Cuerpo alveolado metalico, especialmente cuerpo portante de catalizador con pared portante y procedimiento para su fabricacion.
DE8816514U1 (de) * 1988-04-25 1989-10-26 Emitec Gesellschaft für Emissionstechnologie mbH, 5204 Lohmar Elektrisch beheizbarer Katalysator-Trägerkörper
DE59009027D1 (de) * 1989-06-20 1995-06-08 Emitec Emissionstechnologie Verfahren und vorrichtung zur erzeugung von wärme durch flammlose verbrennung eines brennstoffes in einem gasstrom.
DE19650647A1 (de) * 1996-12-06 1997-04-24 Audi Ag Deformationselement für ein Kraftfahrzeug
US6109386A (en) * 1998-02-03 2000-08-29 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Honeycomb body with a flattened cross-sectional region and a method for producing the honeycomb body
DE102011081490A1 (de) * 2011-08-24 2013-02-28 Bayerische Motoren Werke Aktiengesellschaft Katalysator zur Abgasreinigung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2552615A (en) * 1948-05-29 1951-05-15 Lawrence F Baltzer Muffler with spiral conical insert
US2995200A (en) * 1959-10-23 1961-08-08 Seifert Vernon Exhaust muffler for engines
DE2905241A1 (de) * 1979-02-12 1980-08-14 Bremshey Ag Traegermatrix fuer einen katalytischen reaktor zur abgasreinigung bei brennkraftmaschinen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2552615A (en) * 1948-05-29 1951-05-15 Lawrence F Baltzer Muffler with spiral conical insert
US2995200A (en) * 1959-10-23 1961-08-08 Seifert Vernon Exhaust muffler for engines
DE2905241A1 (de) * 1979-02-12 1980-08-14 Bremshey Ag Traegermatrix fuer einen katalytischen reaktor zur abgasreinigung bei brennkraftmaschinen

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3638082A1 (de) * 1986-11-07 1988-05-11 Interatom Abgasleitung mit hohlkegelfoermigen katalysatortraegerkoerpern
US5328774A (en) * 1990-08-06 1994-07-12 Emitec Gesellschaft Fur Emissionstechnologie Mbh Monolithic metal honeycomb body with varying number of channels
CN1098410C (zh) * 1997-11-07 2003-01-08 发射技术有限公司 带有外露热辐射面的催化剂载体
EP1215374A1 (fr) * 2000-12-14 2002-06-19 Detroit Diesel Corporation Dispositif comprenant un catalyseur pour contrôler les émissions pour un moteur de véhicule automobile
EP2221098B2 (fr) † 2009-02-16 2015-03-18 NGK Insulators, Ltd. Structure en nid d'abeille

Also Published As

Publication number Publication date
ATE25128T1 (de) 1987-02-15
DE3462171D1 (en) 1987-02-26
EP0121175B1 (fr) 1987-01-21
DE3311724A1 (de) 1984-10-04

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