GB2212414A - A catalytic unit for purifying exhaust gases, spirally wound with pin support - Google Patents

A catalytic unit for purifying exhaust gases, spirally wound with pin support Download PDF

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Publication number
GB2212414A
GB2212414A GB8826363A GB8826363A GB2212414A GB 2212414 A GB2212414 A GB 2212414A GB 8826363 A GB8826363 A GB 8826363A GB 8826363 A GB8826363 A GB 8826363A GB 2212414 A GB2212414 A GB 2212414A
Authority
GB
United Kingdom
Prior art keywords
unit
support
catalytic
catalytic unit
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
GB8826363A
Other versions
GB2212414B (en
GB8826363D0 (en
Inventor
Veikko Loukeinen
Reijo Lylykangas
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.)
Kemira Oyj
Original Assignee
Kemira Oyj
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 Kemira Oyj filed Critical Kemira Oyj
Publication of GB8826363D0 publication Critical patent/GB8826363D0/en
Publication of GB2212414A publication Critical patent/GB2212414A/en
Application granted granted Critical
Publication of GB2212414B publication Critical patent/GB2212414B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/04—Punching, slitting or perforating
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/02—Cellular or porous
    • B32B2305/024—Honeycomb
    • 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
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/18—Exhaust treating devices having provisions not otherwise provided for for improving rigidity, e.g. by wings, ribs
    • 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

Landscapes

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

Description

r 1 2212414 1 A method for manufacturing and reinforcing a catalytic unit
to be used for purifying exhaust gases The present invention relates to a method for manufacturing and reinforcing a catalytic unit intended for the purification of exhaust gases, wherein a helical unit is formed by winding from a corrugated foil band and a straight foil band, disposed one on top of the other.
Such a unit is known previously from, for example, GB patent 2069364. According to the method disclosed in the said patent, the unit is first made from uncoated foil bands, and at both or one of the ends of the unit there are welded one or several seams the purpose of which is to prevent axial movement of the helical foil bands in relation to one another. In this method the catalytic unit cannot be coated with a support-material layer and a catalytic material until after the welding, since the support material lowers the electrical conductivity and prevents the flow of current during welding. When the support material is added to a complete unit, it does not spread evenly but accumulates in the cavities formed by the meeting points of the foils and collects in itself the actual catalyst, in which case the catalyst material will not be used effectively, a factor which for its part increases the costs and lowers the efficiency.
DE Patent 2924592 discloses a method for making a catalytic unit, in which method an uncoated corrugated foil band and an uncoated straight foil band are secured to each other by brazing. This method has a disadvantage in that, in connection with the brazing, it is necessary to use high temperatures, which results in the weakening of the structure and a deterioration of the surface. Brazing is expensive as a method, and brazing limits the choice of the catalytic-unit 2 materials to metals which can be brazed. Such materials are not necessarily the best materials for catalytic units. In this method, also, the catalytic unit cannot be coated with a support-material layer and catalytic materials until after the foils have been secured to each other.
Finnish Patent Application 861801 discloses a method for manufacturing and reinforcing a catalytic unit. In the method, a corrugated foil band and a straight foil band, coated in advance with both a support-material layer and a catalyst layer, are secured to a central shaft, which is a thin rod and around which the catalytic unit of the desired size is formed, whereafter end supports are secured to the ends of the shaft in such a way that they press somewhat towards the inside of the unit, thereby preventing axial movement of the foils. In this method, the central shaft or sheet, remaining inside the unit, gives extra weight to the unit and.. furthermore, the central shaft with its end supports somewhat reduces the open cross-sectional area of the catalytic unit.
T Lhe object of the present invention is to produce a method for manufacturing and reinforcing a catalytic unit, a method without the disadvantages of the previously known methods. This is achieved according to the invention by winding a straight foil band and a corrugated foil band, coated in advance with a support-material layer and a catalyst layer, around a shaft of a certain size in such a way that, after the removal of the shaft an oblong aperture of the desired size is left in the center of the unit. Thereafter the unit is pressed into an oval shape, i.e. the cross section of the unit will have the shape of a race track and the opening in the center of the unit closes. Thereafter a support is pressed or shot through the unit, 'the support preventing the unwinding of the unit and the rubbing of the foil bands against each other, and thus a 1 A 3 rigid piece which will retain its shape is produced.
According to one embodiment of the invention it is possible to produce a catalytic unit by winding a straight foil band and a corrugated foil band, coated in advance, directly into a round unit so that no oblong aperture is left in the center of the unit. Thereafter, a support is pressed or shot through the unit; this support will prevent the unwinding of the unit and the rubbing of the foil bands against each other, and thus a rigid piece which will retain its shape is obtained.
According to one embodiment of the invention, two or more supports are pressed through the unit in such a way that the supports will be either in parallel or in succession in relation to each other.
The passing of the supports through the unit can be carried out either by pressing or by shooting. According to one embodiment of the invention it is possible in advance to make, for the supports, a hole having the length of the support, for example, by drilling, and after the hole has been made, a support which fills the hole is pressed into it.
The support to be pressed through the unit preferably has a round, oval, square or rectangular cross-section. According to the invention, a support passed through the unit has the length of the unit diameter (round unit) or unit height (race track), and preferably a length 1 - 10 mm greater than the diameter or height of the unit.
The support or supports passed through the unit are preferably made of fire-resistant steel.
If a round unit is formed by securing a straight metal foil 4 and a corrugated metal foil, coated in advance with a support-material layer and a catalyst layer, to a central shaft which is a thin rod or a blank bent into U-shape from a sheet and around which a round unit of desired size is formed, the central shaft used as the rotation axis is left inside the unit. Before the winding of the unit, one or more apertures are made in the central shaft so that, after the winding of the unit, a support is pressed or shot through the unit in such a way that it passes through the aperture or apertures in the central shaft. Thus a rigid catalytic unit which will retain its shape is formed.
The invention is described below with reference to the accompanying figures, in which Figure 1 depicts an end view of a preferred embodiment of the invention, and Figure 2 depicts a side view of a unit according to the invention.
Figure 1 shows a catalytic unit (1) wound from a corrugated foil band (2) and a straight foil band (3), disposed one on t6D of the other, which unit has, after the winding of the unit, been pressed into a race-track shape, whereafter a support (4) has been pressed through the unit.
Figure 2 shows a round unit (1) which has been wound from a straight foil band (3) and a corrugated foil band (2), disposed one on top of the other, and through which a support (4) slightly longer then the diameter of the unit has been pressed.
Z _T C L A 1 M S 1. A method of manufacturing and reinforcing a catalytic unit to be used for purifying exhaust gases, by forming a helical unit from a corrugated foil welt and a straight foil web disposed one on top of the other; wherein the corrugated foil band and the straight foil band, coated in advance with both a support material and a catalyst laye r, form a unit without a central shaft or sheet; and wherein the unwinding and mutual rubbing of the unit is prevented by means of at least one support passed through the unit.
2. A method according to claim 1, wherein the catalytic unit has a substantially oval cross-section.
3. A method according to claim 1 or 2, wherein the support pierces the unit.
4. A method according to claim 1 or 2, comprising drilling a hole through the catalytic unit and by placing the support in the hole.
5. A method according to claim 1 or 2, wherein the support passed through the unit is 1 - 10 mm longer than the corresponding transverse dimension of the unit.
6. A method of manufacturing and reinforcing a catalytic unit, substantially as hereinbefore described with reference to the accompanying drawings.
7. A catalytic unit made by the method of any one of claims 1 to 6.
Published 1989 at The Patent Office, State House, 66,171 High Holborn, London WClR4TP. Further copies maybe obtained from The Patent Office. Sales Branch, St Mary Cray, Orpington, Kent BR5 3F.D. Printed by Multiplex techniques ltd, St Mary Cray, Kent, Con. 1187
GB8826363A 1987-11-16 1988-11-10 A method for manufacturing and reinforcing a catalytic unit to be used for purifying exhaust gases Expired - Fee Related GB2212414B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI875045A FI78161C (en) 1987-11-16 1987-11-16 FOERFARANDE FOER FRAMSTAELLNING OCH FOERSTAERKNING AV EN KATALYTCELLSTRUKTUR ANVAENDBAR FOER RENING AV AVGASER.

Publications (3)

Publication Number Publication Date
GB8826363D0 GB8826363D0 (en) 1988-12-14
GB2212414A true GB2212414A (en) 1989-07-26
GB2212414B GB2212414B (en) 1991-09-25

Family

ID=8525420

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8826363A Expired - Fee Related GB2212414B (en) 1987-11-16 1988-11-10 A method for manufacturing and reinforcing a catalytic unit to be used for purifying exhaust gases

Country Status (21)

Country Link
JP (1) JPH01155948A (en)
KR (1) KR890008432A (en)
AT (1) AT392750B (en)
AU (1) AU606226B2 (en)
BE (1) BE1002482A3 (en)
BR (1) BR8805954A (en)
CA (1) CA1323752C (en)
CH (1) CH675750A5 (en)
CS (1) CS277579B6 (en)
DD (1) DD283667A5 (en)
DE (1) DE3838295C2 (en)
ES (1) ES2011406A6 (en)
FI (1) FI78161C (en)
FR (1) FR2623244B1 (en)
GB (1) GB2212414B (en)
IT (1) IT8822586A0 (en)
NL (1) NL8802793A (en)
PL (1) PL159280B1 (en)
RU (1) RU1837962C (en)
SE (1) SE468323B (en)
YU (1) YU207488A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5846495A (en) * 1995-07-12 1998-12-08 Engelhard Corporation Structure for converter body
DE102004024685A1 (en) 2004-05-19 2005-12-15 Emitec Gesellschaft Für Emissionstechnologie Mbh Catalyst carrier body for a close-coupled catalytic converter

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB753658A (en) * 1953-06-19 1956-07-25 Havilland Engine Co Ltd Metal catalyst packs
GB2001547A (en) * 1977-07-26 1979-02-07 Sueddeutsche Kuehler Behr Carrier matrix for a catalytic reactor for exhaust-gas purification of internal combustion engines
EP0243952A1 (en) * 1986-04-29 1987-11-04 Kemira Oy A method for manufacturing and reinforcing a catalytic unit intended for purifying exhaust gases
EP0245738A1 (en) * 1986-05-12 1987-11-19 INTERATOM Gesellschaft mit beschränkter Haftung Metallic honeycomb body, particularly a catalyst carrier, provided with a supporting wall, and its manufacturing process

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1531134A (en) * 1975-08-20 1978-11-01 Atomic Energy Authority Uk Methods of fabricating bodies and to bodies so fabricated
DE2746182A1 (en) * 1977-10-14 1979-04-19 Volkswagenwerk Ag Cylindrical catalyst carrier retention - using transverse hole and welded bolt to join carrier to casing
US4201947A (en) * 1978-02-10 1980-05-06 Rca Corporation Long-tailed-pair connections of MOSFET's operated in sub-threshold region
DE2924592C2 (en) * 1979-06-19 1983-05-26 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Method for producing a carrier matrix for a catalytic reactor for exhaust gas purification in internal combustion engines of motor vehicles
GB2069364B (en) * 1980-02-19 1984-05-23 Johnson Matthey Co Ltd Exhaust gas purification catalyst units
DE3515681A1 (en) * 1985-05-02 1986-11-06 Üründül, Celâl, 6800 Mannheim Metal support in a single-foil design
US4598063A (en) * 1985-08-09 1986-07-01 Retallick William B Spiral catalyst support and method of making it
JPS62228616A (en) * 1986-03-29 1987-10-07 Nippon Kinzoku Kk Catalytic cartridge for exhaust gas emission control
JPS6336842A (en) * 1986-07-29 1988-02-17 Nippon Radiator Co Ltd Metallic honeycomb carrier and its preparation
JPS63185456A (en) * 1987-01-26 1988-08-01 Calsonic Corp Production of metal honeycomb carrier
JPS6463045A (en) * 1987-09-03 1989-03-09 Toyota Motor Corp Metallic carrier

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB753658A (en) * 1953-06-19 1956-07-25 Havilland Engine Co Ltd Metal catalyst packs
GB2001547A (en) * 1977-07-26 1979-02-07 Sueddeutsche Kuehler Behr Carrier matrix for a catalytic reactor for exhaust-gas purification of internal combustion engines
EP0243952A1 (en) * 1986-04-29 1987-11-04 Kemira Oy A method for manufacturing and reinforcing a catalytic unit intended for purifying exhaust gases
EP0245738A1 (en) * 1986-05-12 1987-11-19 INTERATOM Gesellschaft mit beschränkter Haftung Metallic honeycomb body, particularly a catalyst carrier, provided with a supporting wall, and its manufacturing process

Also Published As

Publication number Publication date
FR2623244A1 (en) 1989-05-19
DE3838295C2 (en) 1994-05-05
DD283667A5 (en) 1990-10-17
GB2212414B (en) 1991-09-25
CH675750A5 (en) 1990-10-31
CS277579B6 (en) 1993-03-17
GB8826363D0 (en) 1988-12-14
SE8804108D0 (en) 1988-11-15
AU606226B2 (en) 1991-01-31
CS752088A3 (en) 1992-08-12
BE1002482A3 (en) 1991-02-26
NL8802793A (en) 1989-06-16
PL159280B1 (en) 1992-12-31
ES2011406A6 (en) 1990-01-01
KR890008432A (en) 1989-07-10
FI78161B (en) 1989-02-28
DE3838295A1 (en) 1989-05-24
ATA274788A (en) 1990-11-15
FI875045A0 (en) 1987-11-16
CA1323752C (en) 1993-11-02
JPH01155948A (en) 1989-06-19
RU1837962C (en) 1993-08-30
FI78161C (en) 1989-06-12
AU2460088A (en) 1989-05-25
SE8804108L (en) 1989-05-17
SE468323B (en) 1992-12-14
BR8805954A (en) 1989-08-08
FR2623244B1 (en) 1994-04-29
AT392750B (en) 1991-05-27
PL275834A1 (en) 1989-07-24
IT8822586A0 (en) 1988-11-11
YU207488A (en) 1990-04-30

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PCNP Patent ceased through non-payment of renewal fee