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
  • F01N3/2857—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
• • 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
  • F01N3/2839—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
  • F01N3/2864—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 comprising two or more insulation layers
• • 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
  • F01N2510/00—Surface coverings
  • F01N2510/08—Surface coverings for corrosion prevention
• • 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
  • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust

Definitions

• the invention relates to a honeycomb body, in particular a catalyst carrier body, made of at least partially structured sheet-metal foils layered and / or wound or folded carrier matrix with a plurality of channels through which a fluid can flow and which are essentially parallel to a central longitudinal axis, the honeycomb body having a multi-layer jacket.
• thick carrier matrix shells have considerable disadvantages when connecting thin sheet foils to the carrier matrix, with the trend towards ever thinner foils. So, if you want to achieve a durable, especially technical connection between the support matrix and the housing, in particular the welding depth, for example of an electron or Laser beam can be set very precisely, since otherwise the outer metal foils of the carrier matrix can be cut during welding or not properly connected, so that the welded connection between the housing and the carrier matrix becomes unstable in the long run.
• EP 0 509 207 A1 discloses a honeycomb body consisting of a plurality of layers of corrugated and / or smooth sheets stacked and intertwined, which have smooth, overlapping end sections.
• the overlapping end sections form an outer layer on the circumference of the carrier matrix, which is chosen so that it is larger than the wall thickness of the jacket surrounding it, and can therefore be connected to the jacket without problems, in particular welded.
• a carrier matrix jacket of a honeycomb body which absorbs the vibrations mentioned a little better is known for example from DE 28, 56 030 AI, accordingly a carrier matrix is surrounded by a slotted, open hollow cylinder jacket which is produced from a flat, cut piece of sheet metal by rolling it up. The carrier matrix is then inserted into this slotted open hollow cylinder jacket and then placed and pressed between two tools, so that there is an overlap in the area of the slot or, depending on the dimensioning and design of the jacket, a butt joint which is welded. From US Pat. No.
• a honeycomb body arrangement in which the carrier matrix is surrounded by a jacket, which in turn is arranged in a separate, concentrically arranged jacket tube essentially at a distance from it, ie, for example, air-gap insulated.
• multi-layer carrier matrix shells made of plated steel sheet which is known from WO 97/11934 and which is provided on one side with a base material forming a middle layer and made of a first stainless steel and on the other side with a support made of a second, of which first stainless steel various stainless steel.
• the layer thicknesses of the supports are usually only about 10% of the total sheet thickness. Even if clad steel sheets are adaptable in particular to hot gas and wet corrosion-related conditions of use, they do not have good vibration and / or sound-damping properties, and the layers cannot expand axially differently.
• honeycomb body with an improved carrier matrix jacket, in particular with good vibration and sound damping properties.
• the components of the honeycomb body should be able to expand against one another by different amounts, in particular longitudinally, without a simple and permanent connection of the carrier matrix to the jacket suffering as a result.
• the honeycomb body should have a carrier matrix jacket which allows a simplified connection of the carrier matrix to the jacket.
• a honeycomb body with a carrier matrix jacket according to the features of patent claim 1.
• Advantageous further developments and refinements that can be used individually or in combination with one another are the subject of the dependent claims.
• the invention is based on the idea that carrier matrix shells of a honeycomb body, in particular catalyst carrier bodies, produced from a layer for a carrier matrix layered and / or wound or folded from at least partially structured sheet metal foils with a multiplicity of flowable for a fluid, essentially parallel to a central longitudinal axis Channels, are relatively stiff and vibrate largely undamped, which can be seen from the attack that they sound like a bell.
• Carrier matrix shells produced from at least two, preferably three or more, individual, smooth, concentrically arranged layers, preferably of essentially the same thickness, of which at least two layers are directly adjacent to one another, dampen vibrations and sound much more strongly.
• Such jackets can be produced, for example, simply by stacking or rolling several layers of steel.
• the layers of the carrier matrix pattern are preferably connected to one another in such a way that they can stretch by different amounts relative to one another, in particular longitudinally. This advantageously avoids thermal stresses and ensures a long product life.
• the ends of the sheet metal foils are preferably connected exclusively to the innermost layer of the carrier matrix jacket in at least one connecting section, preferably adjacent to the fluid inlet side end face of the honeycomb body, in particular by joining technology.
• the honeycomb body as a whole has only a small axial length of, for example, less than 60 mm, preferably only about 30 mm, the ends of the sheet metal foils can also be connected over their entire axial length to the innermost layer of the carrier matrix jacket, which advantageously simplifies their manufacture becomes.
• the layers of the carrier matrix jacket are preferably connected to one another, at least in parts, predominantly by joining technology, in particular welded, soldered or glued.
• the innermost layer of the carrier matrix shell with the next outer layer of the carrier matrix shell and / or this in turn with the next outer layer of the carrier matrix shell in a symmetrically arranged, for example circumferential, circumferential, preferably approximately in the central region of the honeycomb body with respect to the longitudinal axis lying, connecting section to be connected.
• the innermost layer of the carrier matrix shell can be connected to the next outer layer of the carrier matrix shell and / or this can be connected to the next outer layer of the carrier matrix shell in one or more connecting sections arranged asymmetrically with respect to the longitudinal axis, in particular in a spiral or helical shape.
• Symmetrical and asymmetrical connecting sections or possibly only partial sections thereof can also alternate between several adjacent layers.
• An asymmetrical arrangement is to be understood to mean that at no point on any plane perpendicular to the longitudinal axis of the honeycomb body are connection sections of the same asymmetrical connection arranged which are substantially 180 ° offset from one another with respect to the longitudinal axis.
• connection section (s), in which the connection between layers of the carrier matrix jacket is established is sufficient on the one hand Connection strength established between adjacent layers, in particular as long as these connections are essentially at the places where otherwise the greatest vibration amplitudes occur.
• the carrier matrix jacket of such a honeycomb body advantageously has a sufficiently high strength to be able to absorb thermal loads, in particular as a result of temperature differences.
• the connecting sections arranged between the layers of the carrier matrix jacket be spatially as far apart as possible from the connecting sections of the carrier matrix to the innermost layer, i.e. are separated from each other.
• the layers are interlocking with one another, preferably by means of at least one bead in each case, and the layers connected in this way are connected to the innermost layer by joining technology.
• All layers of the carrier matrix jacket can also be connected to one another in a form-fitting manner, preferably by means of at least one bead in each case.
• a compensator configured in the form of a loop in the axial longitudinal section can be arranged in particular between the two outermost layers of the carrier matrix jacket.
• Layers with a thickness less than 1.5 times the thickness of the sheet metal foils are particularly advantageous, in particular a thickness less than 1.25 times the thickness of the sheet metal foils, preferably approximately the same thickness as the sheet metal foils, so that the layers of the Carrier matrix jacket advantageously to have approximately the same temperature-related elongation characteristic as the sheet metal foils of the carrier matrix.
• layers with a thickness of less than or equal to 0.05 mm, in particular less than or equal to 0.04 mm, preferably less than or equal to 0.03 mm, are used.
• the outermost layer be made axially slightly longer than the inner layers of the carrier matrix jacket.
• a carrier matrix jacket of a honeycomb body with layers of the same length is proposed, at least the outermost layer each having a connecting bead on the end face, which advantageously facilitates the connection, preferably joining, of a cone.
• a cone is preferred which has a wall thickness such that the support matrix jacket composed of layers is covered on the end face.
• the innermost layer of the carrier matrix shell consists of a hot gas corrosion-resistant stainless steel or at least correspondingly be coated or plated on the inside and / or that the outer layer of the carrier matrix shell consists of a wet corrosion-resistant stainless steel or at least correspondingly be coated or plated on the outside. It can also be taken into account that the outermost layer is not only exposed to wet corrosion, but also to mechanical stress caused by exposure to stones or sand or the like. Further features and advantages of the invention result from the following description and the exemplary embodiments shown in the drawing.
• Fig. 1 shows a highly schematic representation of the invention
• Honeycomb body esp. Catalyst carrier body, with a two-day carrier matrix jacket in the front view;
• FIG. 2 further details of the honeycomb body according to the invention according to FIG. 1;
• Fig. 3 shows a highly schematic honeycomb body according to the invention with a three-layer carrier matrix jacket in the
• FIG. 4 shows a side view of the honeycomb body according to the invention according to FIG.
• FIGS. 1 and 2 shows the honeycomb body according to the invention according to FIGS. 1 and 2 in a perspective view with asymmetrically connected
• FIGS. 6 and 7 further alternative embodiments, shown in side view, of connecting the layers of the carrier matrix jacket to one another;
• FIG. 8 shows a carrier matrix jacket comprising an intermediate layer
• FIG. 9 shows a carrier matrix jacket comprising a compensator; and 10 and 11 a longitudinal section through a four-layer carrier matrix jacket with a cone arranged thereon.
• FIG. 1 shows a highly schematic of a honeycomb body 1 according to the invention, in particular a catalyst carrier body, comprising a carrier matrix jacket 2 for a carrier matrix 3 layered and / or wound or folded from at least partially structured sheet metal foils 4, 5 with a plurality of channels 7 through which a fluid can flow 1, the carrier matrix jacket 2 is constructed from two separate, smooth, concentrically arranged layers 8, 10 of essentially the same thickness, which lie directly against one another. Further details of the honeycomb body 1 according to FIG. 1, in particular a preferred S-shaped arrangement of the sheet foils 4, 5, are shown in FIG. 2.
• the carrier matrix jacket 2 can also be constructed from three layers 8, 9, 10, as is shown schematically in FIG. 3, or from more than three layers.
• the layers 8, 9, 10 of the carrier matrix jacket 2 are connected to one another in such a way that they can stretch against one another by different amounts, in particular axially.
• the sheet metal foils 4, 5 are connected via their ends 11, 12 exclusively at the innermost layer 8 of the carrier matrix jacket 2 in at least one connecting section 15, preferably adjacent to the fluid inlet end 13 of the honeycomb body 1, as in FIG Fig. 4 is shown.
• FIG. 4 shows that, in particular to avoid telescoping the carrier matrix 3, the ends 11, 12 of the sheet metal foils 4, 5 are additionally connected to the innermost layer 8 in a connecting section 16 adjacent to the fluid outlet end 14 of the honeycomb body 1.
• the ends 11, 12 of the metal foils 4, 5 can also have the innermost over their entire axial length (L)
• Layer 8 of the carrier matrix jacket 2 can be connected (not shown).
• the layers 8, 9, 10 of the carrier matrix jacket 2 are preferably connected to one another predominantly by joining technology, in particular welded, soldered or glued.
• Fig. 4 it is also shown that the innermost layer 8 of the carrier matrix shell 2 with the next outer, in the embodiment already the outermost layer 10 of the carrier matrix shell 2, in a symmetrically arranged with respect to the longitudinal axis 6 of the honeycomb body 1, preferably approximately in the central region of the Honeycomb body 1 lying, connecting section 17 are connected.
• This connection technique can of course also be used for three-layer or multi-layer carrier matrix sleeves 2.
• FIG. 5 shows an alternative connection of the layers 8, 10 in a schematic perspective representation.
• the innermost layer 8 of the carrier matrix shell 2 is connected to the adjacent outer layer 10 of the carrier matrix shell 2 in one or more connecting sections 18 arranged asymmetrically with respect to the longitudinal axis 6, which extends helically over the axial length (L) of the honeycomb body 1.
• connecting sections 18 arranged asymmetrically with respect to the longitudinal axis 6, which extends helically over the axial length (L) of the honeycomb body 1.
• L axial length
• symmetrical and asymmetrical connecting sections can also differ from layer to layer.
• a carrier matrix jacket the innermost layer of which is symmetrical with the next outer layer and all other layer connections, possibly even only in some areas, are asymmetrically connected (not shown) with good vibration and noise-damping characteristics as well as thermal expansion.
• FIG. 6 Another connection alternative is shown in FIG. 6.
• the layers 9, 10 of the carrier matrix jacket 2 are interlocking with one another, preferably by means of at least one interlocking bead 19, for example, as shown by means of an outer bead 19, and the layers 9 connected in this way , 10 connected to the innermost layer 8 by joining technology in symmetrical connection areas 17 arranged adjacent the bead 19.
• a preferred production sequence first provides for a careful connection of the carrier matrix 3 and the innermost layer 8, which is then positioned in the outermost layers 9 and 10, which are preferably prefabricated as a uniform intermediate product, and connected by joining technology.
• all layers 8, 9, 10 of the carrier matrix jacket 2 can also be connected to one another in a form-fitting manner, preferably by means of at least one interlocking bead 19, the carrier matrix 3 in turn preferably being arranged adjacent to the two end faces 13, 14 Connection sections 15, 16 is connected to the innermost layer of the multi-layer carrier matrix jacket 2 by joining technology.
• connection principles listed merely by way of example advantageously allow the individual components of the honeycomb body 1 to expand by different amounts relative to one another, in particular longitudinally, in accordance with their thermal loading.
• 8 shows a honeycomb body 1, in which a thin, approximately 0.5 to 0.8 mm thick, intermediate layer 20, preferably made of ceramic material, in particular a swelling mat, is arranged in particular between the two outermost layers 9, 10 of the carrier matrix jacket 2 , which in particular advantageously absorbs resonance vibrations and advantageously ensures a certain press fit, particularly in the case of positive connections.
• Fig. 9 shows a honeycomb body 1, wherein the outermost particular between the two layers 9, 10 of the carrier matrix shell 2 a sch securedf 'RMIG formed in axial longitudinal section is disposed compensator 21 which also receives particular resonance.
• Compensator and source elements can also be used cumulatively, in particular in the case of multi-layer carrier matrix shells.
• the layers 8, 9, 10 of the carrier matrix jacket 2 preferably have a thickness less than 1.5 times the thickness of the sheet metal foils 4, 5, in particular a thickness less than 1.25 times the thickness of the sheet metal foils 4, 5, preferably the same thickness as the metal foils 4, 5.
• the layers 8, 9, 10 of the carrier matrix jacket 2 are therefore preferably less than / equal to 0.5 mm, in particular less than / equal to 0.4 mm, preferably less than / equal to 0.3 mm thick.
• the layer thicknesses shown schematically in FIGS. 1 to 11 therefore do not correspond to the circumstances but serve for better illustration.
• the carrier matrix jacket 2 according to the exemplary embodiment according to FIG. 10 has four separate, smooth, concentrically arranged layers of essentially of the same thickness, which are directly adjacent to one another, the outermost layer 10 being designed to be axially slightly longer than the inner layer (s) 8, 9 of the carrier matrix jacket 2 for easier connection to a cone 23.
• all the layers of the carrier matrix jacket 2 can also be of the same length, with at least the outermost layer 10 each having a connecting bead 22 at the end for easier connection to a cone 23.
• the beads 22 could also be designed (not shown) in such a way that, at the same time, the carrier matrix 3 is held in an interlocking manner, alternatively or cumulatively, for a connection in terms of joining technology.
• the cone 23 preferably has a wall thickness such that the carrier matrix jacket 2, which is composed of layers 8, 9, 10, is covered on the end face.
• the innermost layer 8 of the carrier matrix shell 2 is preferably made of a hot gas corrosion-resistant stainless steel or at least correspondingly coated or plated on the inside and / or the outermost layer 10 of the carrier matrix shell 2 is made of a wet corrosion-resistant stainless steel or at least correspondingly coated or plated on the outside accordingly Increase the product life of a honeycomb body 1.
• the honeycomb body 1 according to the invention is distinguished in particular by its vibration and sound-absorbing properties due to the advantageous multilayer construction of its carrier matrix jacket 2.

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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)
• Exhaust Gas After Treatment (AREA)
• Catalysts (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (1)

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Family Applications (1)

Country Status (6)

Families Citing this family (12)

Citations (8)

Family Cites Families (9)

• 1999
  • 1999-10-28 DE DE19951941A patent/DE19951941C1/de not_active Expired - Fee Related
• 2000
  • 2000-10-23 AU AU79220/00A patent/AU7922000A/en not_active Abandoned
  • 2000-10-23 JP JP2001533295A patent/JP2003513190A/ja active Pending
  • 2000-10-23 WO PCT/EP2000/010431 patent/WO2001031175A1/de not_active Ceased
  • 2000-10-23 EP EP00969537A patent/EP1224384B1/de not_active Expired - Lifetime
  • 2000-10-23 DE DE50009667T patent/DE50009667D1/de not_active Expired - Lifetime
• 2002
  • 2002-04-29 US US10/134,944 patent/US20020146360A1/en not_active Abandoned

Patent Citations (8)

Non-Patent Citations (2)

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