WO1993004778A1 - Corps a nid d'abeilles monolithique surallonge - Google Patents

Corps a nid d'abeilles monolithique surallonge Download PDF

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Publication number
WO1993004778A1
WO1993004778A1 PCT/EP1992/001830 EP9201830W WO9304778A1 WO 1993004778 A1 WO1993004778 A1 WO 1993004778A1 EP 9201830 W EP9201830 W EP 9201830W WO 9304778 A1 WO9304778 A1 WO 9304778A1
Authority
WO
WIPO (PCT)
Prior art keywords
honeycomb body
length
cross
monolithic honeycomb
honeycomb
Prior art date
Application number
PCT/EP1992/001830
Other languages
German (de)
English (en)
Inventor
Wolfgang Maus
Ludwig Wieres
Alfred Reck
Original Assignee
Emitec Gesellschaft Für Emissionstechnologie Mbh
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 Emitec Gesellschaft Für Emissionstechnologie Mbh filed Critical Emitec Gesellschaft Für Emissionstechnologie Mbh
Priority to EP92916954A priority Critical patent/EP0602063A1/fr
Priority to JP5504867A priority patent/JPH06510695A/ja
Publication of WO1993004778A1 publication Critical patent/WO1993004778A1/fr

Links

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
    • F01N3/2803—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
    • B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
    • 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
    • F01N3/2817—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates only with non-corrugated sheets, plates or foils
    • 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
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Definitions

  • the present invention relates to a monolithic honeycomb body, in particular a catalyst carrier body, preferably for use in catalytic converters of exhaust gas assemblies in motor vehicles.
  • honeycomb bodies made of layers of at least partially structured sheets, which form a multiplicity of channels through which a fluid can flow in a main flow direction, are known in large numbers from the prior art.
  • a typical design of such honeycomb bodies is described, for example, in EP-B-o 245 737.
  • honeycomb bodies Despite the relatively advanced development of such honeycomb bodies, they have so far only been built with a limited axial length, the largest construction types known to date having an axial length of 152 mm. built, the largest types known to date have an axial length L of 152 mm.
  • the object of the present invention is to create a cost-effective honeycomb body which can be installed with little effort, which can provide a large active volume without subdivision into partial bodies and which, if necessary, makes an intermediate space between partial bodies unnecessary for swirling or cross-mixing due to its design.
  • a monolithic honeycomb body in particular a catalyst carrier body, is used from many layers of at least partially structured sheets which form a multiplicity of channels through which a fluid can flow in a main flow direction, the honeycomb body having a length in the main flow direction of more than 160 mm has, preferably 170 to 200 mm. It can also have a swirl zone, at least in its central region as seen in the main flow direction.
  • additional inflow edges can be present in the interior of the channels in the swirling zone, as described in WO 91/01807.
  • Other types of inflow edges as are known from the prior art can also be used for this purpose.
  • the inversions described are particularly inexpensive and can be integrated into existing manufacturing processes if such a honeycomb body consists at least in part of sheets which are corrugated and can accordingly be easily provided with additional inversions.
  • openings in some or all of the sheet metal layers can be provided in the swirling zone, which enable cross-mixing between the individual channels.
  • honeycomb bodies for catalytic converters.
  • a large number of different ratios L / D of axial length L to diameter D were determined as a function of Diameter D or Dmin realized.
  • honeycomb bodies were never used in series, whose ratio L / D or L / Dmin as a function of D or Dmin was above the limit curves in FIGS. 2 and 3.
  • the limit curve corresponds to the longest construction types used to date with different diameters, the length always being 152 mm.
  • FIG. 1 shows a schematic longitudinal section through a device according to the invention Honeycomb body with possible swirl zone
  • FIG. 2 shows a diagram to illustrate the limit curve for "excess lengths” with honeycomb bodies that are round in cross section
  • FIG. 3 shows a diagram to illustrate the limit curve for "excess lengths” with oval or elliptical honeycomb bodies in cross section.
  • the honeycomb body 1 in FIG. 1 is constructed from structured sheet metal layers 3, which are generally arranged in a jacket tube 2, the sheet metal layers 3 being structured such that they form channels 4 through which a fluid can flow in a main flow direction S.
  • the type of structuring of the sheets is not important for the present invention, but alternating layers of smooth and corrugated sheets or alternating layers of differently corrugated sheets are preferably used.
  • the honeycomb body 1 has a length L of at least 160 mm and is therefore longer than the largest construction types used to date (compare limit curves in FIGS. 2 and 3). It is preferably even over 170 mm long, a length which has so far been achieved only by two partial bodies arranged one behind the other.
  • the honeycomb body typically has a diameter of z. B.
  • the honeycomb body according to the invention can have, at least in its central region, a swirling zone 5 which has one or more of the means for influencing the flow listed below. Openings 6 can be provided in the individual sheet-metal layers in the swirling zone, for cross-mixing between adjacent channels 4. Additional leading edges 7, preferably designed as inversions of corrugated sheet-metal layers, can also be present. Flow guiding surfaces 8 in connection with openings and / or inversions can also be useful.
  • FIG. 2 shows the course of a limit curve 10 for defining the term “excess length” for honeycomb bodies with a round cross section in a diagram in which the diameter D on the X axis and the ratio L / D of length on the Y axis L is applied to diameter D.
  • the limit curve 10 corresponds to honeycomb bodies with the largest L / D ratios used to date in larger quantities, which occur with axial lengths of 152 mm. Larger ratios have so far not been considered feasible or technically meaningful and have therefore not been considered.
  • FIG. 3 shows the course of a limit curve 11 for oval or elliptical honeycomb bodies, all the explanations for FIG. 2 correspondingly applying, but replacing the diameter D with the minimum diameter Dmin.
  • larger L / Dmin ratios have so far not been considered as economically feasible or technically sensible.
  • a honeycomb body with excess length does not differ from honeycomb bodies constructed from two partial bodies, but a monolith can be integrated into an exhaust system more cost-effectively than two individual partial bodies, since several steps in handling, coating and fastening can be omitted . This is the main advantage of the present invention, while at the same time there are no disadvantages compared to known systems.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Catalysts (AREA)

Abstract

Corps à nid d'abeilles monolithique (1) composé de couches de tôles (3) au moins partiellement structurées, lesquelles constituent une pluralité de canaux (4) traversées par un fluide dans une direction de courant principale (S), le corps à nid d'abeilles (1) présentant une longueur (L) de plus de 160 mm, de préférence de 170 mm à 200 mm. De tels corps à nid d'abeilles sont utilisés en particulier dans des véhicules automobiles comme corps de support de catalyseurs destinés à l'épuration des gaz d'échappement. Des corps à nid d'abeilles particulièrement longs selon l'invention peuvent être utilisés au lieu de deux ou plusieurs corps individuels disposés en série, sans que se présentent les inconvénients auxquels les spécialistes sont confrontés jusqu'à présent. Si un mélange intérieur est souhaité, il est possible de prévoir une zone de turbulence (5), p. ex. avec des arêtes supplémentaires de division de flux (7).
PCT/EP1992/001830 1991-08-28 1992-08-11 Corps a nid d'abeilles monolithique surallonge WO1993004778A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP92916954A EP0602063A1 (fr) 1991-08-28 1992-08-11 Corps a nid d'abeilles monolithique surallonge
JP5504867A JPH06510695A (ja) 1991-08-28 1992-08-11 過長の単一ブロック形ハニカム体

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEG9110647.8U 1991-08-28
DE9110647U DE9110647U1 (fr) 1991-08-28 1991-08-28

Publications (1)

Publication Number Publication Date
WO1993004778A1 true WO1993004778A1 (fr) 1993-03-18

Family

ID=6870683

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1992/001830 WO1993004778A1 (fr) 1991-08-28 1992-08-11 Corps a nid d'abeilles monolithique surallonge

Country Status (4)

Country Link
EP (1) EP0602063A1 (fr)
JP (1) JPH06510695A (fr)
DE (1) DE9110647U1 (fr)
WO (1) WO1993004778A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0382434A2 (fr) * 1989-02-06 1990-08-16 Nippon Shokubai Kagaku Kogyo Co. Ltd. Méthode de purification des gaz d'échappement d'un moteur diesel
WO1991001178A1 (fr) * 1989-07-18 1991-02-07 Emitec Gesellschaft Für Emissionstechnologie Mbh Element alveole avec des surfaces internes de guidage du flux, en particulier elements de catalyseurs pour vehicules a moteur
WO1991001807A1 (fr) * 1989-07-27 1991-02-21 Emitec Gesellschaft Für Emissionstechnologie Mbh Corps en nid d'abeilles, a aretes internes d'entree, notamment support de catalyseur pour vehicule automobile

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0382434A2 (fr) * 1989-02-06 1990-08-16 Nippon Shokubai Kagaku Kogyo Co. Ltd. Méthode de purification des gaz d'échappement d'un moteur diesel
WO1991001178A1 (fr) * 1989-07-18 1991-02-07 Emitec Gesellschaft Für Emissionstechnologie Mbh Element alveole avec des surfaces internes de guidage du flux, en particulier elements de catalyseurs pour vehicules a moteur
WO1991001807A1 (fr) * 1989-07-27 1991-02-21 Emitec Gesellschaft Für Emissionstechnologie Mbh Corps en nid d'abeilles, a aretes internes d'entree, notamment support de catalyseur pour vehicule automobile

Also Published As

Publication number Publication date
DE9110647U1 (fr) 1992-01-02
JPH06510695A (ja) 1994-12-01
EP0602063A1 (fr) 1994-06-22

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