EP0151229B1 - Matrice pour réacteur catalytique - Google Patents

Matrice pour réacteur catalytique Download PDF

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Publication number
EP0151229B1
EP0151229B1 EP84112840A EP84112840A EP0151229B1 EP 0151229 B1 EP0151229 B1 EP 0151229B1 EP 84112840 A EP84112840 A EP 84112840A EP 84112840 A EP84112840 A EP 84112840A EP 0151229 B1 EP0151229 B1 EP 0151229B1
Authority
EP
European Patent Office
Prior art keywords
matrix
sheet steel
steel strip
folded
strip
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.)
Expired
Application number
EP84112840A
Other languages
German (de)
English (en)
Other versions
EP0151229A1 (fr
Inventor
Manfred Dr.-Ing. Nonnenmann
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.)
Vitesco Technologies Lohmar Verwaltungs GmbH
Original Assignee
Behr 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 Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP0151229A1 publication Critical patent/EP0151229A1/fr
Application granted granted Critical
Publication of EP0151229B1 publication Critical patent/EP0151229B1/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
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2842—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration specially adapted for monolithic supports, e.g. of honeycomb type
    • 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
    • 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
    • F01N3/2814—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates all sheets, plates or foils being corrugated
    • 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
    • F01N2330/04—Methods of manufacturing
    • 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
    • F01N2330/30—Honeycomb supports characterised by their structural details
    • F01N2330/32—Honeycomb supports characterised by their structural details characterised by the shape, form or number of corrugations of plates, sheets or foils
    • F01N2330/323—Corrugations of saw-tooth or triangular form
    • 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
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/02—Fitting monolithic blocks into the housing
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/1241—Nonplanar uniform thickness or nonlinear uniform diameter [e.g., L-shape]
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24628—Nonplanar uniform thickness material
    • Y10T428/24669—Aligned or parallel nonplanarities
    • Y10T428/24694—Parallel corrugations
    • Y10T428/24711—Plural corrugated components
    • Y10T428/24727—Plural corrugated components with planar component
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24744—Longitudinal or transverse tubular cavity or cell

Definitions

  • the invention relates to a matrix for a catalytic reactor for exhaust gas purification according to the preamble of claim 1, as they are preferably used for exhaust gas purification in internal combustion engines or power plants.
  • a matrix of this type is known (DE-C-27 33 640), in which steel strips are either in two layers, namely in the form of a smooth strip and a corrugated strip, or only in one layer in the form of specially designed corrugated strips Matrix are wound up.
  • the sheet steel strips are designed so that each lobe-shaped punched-out portions of one layer press into corresponding openings in the adjacent layer, so that the wound layers of the sheet steel strips are secured in the axial direction.
  • a matrix (GB-A 14 91 206) is also known, which is formed by folding a sheet steel strip onto one another.
  • this sheet steel strip consists of different sections which follow one another in the longitudinal direction, one of which is designed in wave form and the adjoining section is designed as a smooth strip section. When these different sections are placed one on top of the other, a smooth section lies against a corrugated section.
  • the starting tape used to fold the matrix must be matched to the desired matrix form from the outset. The production of such an output tape is also complex.
  • the invention is therefore based on the object of designing a matrix of the type mentioned at the outset in such a way that reactors with largely any desired external shapes can be created without great construction expenditure, which also offer the possibility of better radial compensation of the flow profile of the exhaust gas.
  • the invention is based on a matrix of the type mentioned in the characterizing features of claim 1.
  • This configuration allows the individual layers of the steel strip to be joined together in a relatively simple and largely free manner. Regardless of the direction of folding, two corrugated sections can never lie together and slide into one another. It is also advantageous that the folded layers remain open on one side due to the folding process.
  • a wound matrix where gas compensation is only possible in the circumferential direction, there is a largely simpler possibility for the radial passage of the exhaust gas. This leads to a more even flow profile.
  • the radially outer layers of the catalyst material can also participate in the reaction process.
  • the matrix can be better used.
  • oval or round inserts can be realized without requiring a complicated structure consisting of several parts. If layers of the same length are arranged in the direction of folding, rectangular or rhombic reactors can be constructed so that, depending on the space available, for example, in a motor vehicle, the shape of the matrix for the reactor for exhaust gas purification can be adapted to this space.
  • the steel strips used to form the matrix are provided with prefabricated kinks at the folds, for example in the manner of perforations, so that the production of a matrix according to the invention, the individual layers of which, for example, zigzag -folded onto one another, can be achieved in a simple manner in that a single band folds behind a printer, for example in the same way as continuous paper, if it falls vertically into a shaft, is also fed into a shaft, at the folds slightly kinked and thereby folds into the desired matrix shape.
  • the matrix formed in this way can then be inserted, for example, into a two-part housing and pressed together by this and also fastened to one another in the axial direction. But it can also be inserted axially through a funnel into a closed tubular housing.
  • FIG. 6 shows possibilities of how sheet steel strips according to the invention can be folded into a matrix for a catalytic reactor for exhaust gas purification.
  • a strip of the type shown in FIG. 6 can be used as the steel strip, which is composed of two smooth steel strips 1 with openings 2 and an intermediate corrugated strip 3, which are soldered to one another, for example.
  • Such a tape cannot slide into each other when it is folded up.
  • Tapes of this type can be folded in a meandering manner in the manner shown in FIG. 1 as a single continuous tape 7, so that a matrix according to FIG. 1 with a rectangular outer cross section is created, which can be inserted into a rectangular housing 8. It is simpler to provide a zigzag meander as shown in FIG. 2, 3 or 4 for the folding, whereby in each case prefabricated folding points, for example in the manner of a perforation, can be provided at the folding points 9, which lead to the fact that the continuous Band T, which is folded in a zigzag shape, automatically superimposes on the individual layers 7a, 7b, for example when it is lowered from above into a corresponding shaft and folds up there like a paper strip. It is possible, as indicated in FIGS.
  • this can be done, for example, as indicated with reference to FIG. 5, in that a sheet steel strip of the type as shown in FIG. 6 is folded onto one another in the manner shown in FIG. 2 and then between the upper part 13 and the lower part 14 is jammed and thereby also in the axial direction, d. H. in the direction of the flow, which is indicated by the arrow 15.
  • a matrix formed in this way in which, of course, the individual sheets 1 and 3 provided for production are coated with catalyst material in a known manner, has the advantage that it is very easy to produce. Due to the arrangement of the openings 2, gas equalization is also possible perpendicular to the boundary surfaces 17 of the individual layers 7A, 7B.
  • the clear overall cross section of all openings 2 can be chosen so that this radial compensation is achieved to form a uniform flow profile. It has been shown that this is generally the case if the total cross section of the openings 2 is more than 5% of the area of the boundary surfaces 17.
  • the openings can be provided in the corrugation direction or transversely thereto (2 '), which is more advantageous since they overlap better when layering.

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  • 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)

Claims (4)

1. Matrice pour un réacteur catalytique pour épuration de gaz effluents, de préférence pour des moteurs à combustion interne, qui est constituée d'une bande de tôle d'acier continue et pouvant être revêtue d'une matière formant catalyseur, qui est pliée successivement sur elle-même en forme de zig-zag et qui comporte des zones pourvues d'ondulations, qui forment après le pliage des canaux d'écoulement, qui sont parcourus par le gaz effluent qui est introduit dans un carter de forme tubulaire ou analogue pour la matrice, caractérisée en ce qu'il est prévu comme bande de tôle d'acier (7, 7') une bande (7,7') continue uniforme, et constituée de trois couches (1 ou 3) dont les deux couches extérieures se composent de bandes lisses (1), avec ou sans évidements (2), et dont la couche centrale (3) est une bande ondulée qui est également agencée avec ou sans évidements ou interruptions, de sorte que la bande de tôle d'acier est pliable à volonté dans les deux directions.
2. Matrice selon la revendication 1, caractérisée en ce que les couches pliées (7a, 7b) ont une longueur inégale (a, b) dans la direction de pliage.
3. Matrice selon une des revendications 1 ou 2, caractérisée en ce que les bandes de tôle d'acier (7,7') utilisées sont pourvues aux endroits de pliage de zones d'affaiblissement (9) créées au préalable.
4. Matrice selon la revendication 3, caractérisée en ce que les zones d'affaiblissement (9) sont réalisées sous forme de perforations.
EP84112840A 1983-11-19 1984-10-25 Matrice pour réacteur catalytique Expired EP0151229B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833341868 DE3341868A1 (de) 1983-11-19 1983-11-19 Matrix fuer einen katalytischen reaktor
DE3341868 1983-11-19

Publications (2)

Publication Number Publication Date
EP0151229A1 EP0151229A1 (fr) 1985-08-14
EP0151229B1 true EP0151229B1 (fr) 1988-06-15

Family

ID=6214741

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84112840A Expired EP0151229B1 (fr) 1983-11-19 1984-10-25 Matrice pour réacteur catalytique

Country Status (3)

Country Link
US (1) US4647435A (fr)
EP (1) EP0151229B1 (fr)
DE (2) DE3341868A1 (fr)

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JP3610720B2 (ja) * 1997-03-03 2005-01-19 日産自動車株式会社 メタル触媒担体の構造
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US4647435A (en) 1987-03-03
EP0151229A1 (fr) 1985-08-14
DE3472133D1 (en) 1988-07-21
DE3341868A1 (de) 1985-05-30

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