EP0176722A1 - Catalytic exhaust gas detoxication device - Google Patents

Catalytic exhaust gas detoxication device Download PDF

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Publication number
EP0176722A1
EP0176722A1 EP85110292A EP85110292A EP0176722A1 EP 0176722 A1 EP0176722 A1 EP 0176722A1 EP 85110292 A EP85110292 A EP 85110292A EP 85110292 A EP85110292 A EP 85110292A EP 0176722 A1 EP0176722 A1 EP 0176722A1
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EP
European Patent Office
Prior art keywords
exhaust gas
mat
ceramic body
outer housing
detoxification device
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Granted
Application number
EP85110292A
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German (de)
French (fr)
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EP0176722B1 (en
Inventor
Jürgen Brich
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Leistritz AG
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Leistritz AG
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Priority to AT85110292T priority Critical patent/ATE34429T1/en
Publication of EP0176722A1 publication Critical patent/EP0176722A1/en
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Publication of EP0176722B1 publication Critical patent/EP0176722B1/en
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    • 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
    • F01N3/2867—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 placed at the front or end face of catalyst body
    • 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
    • F01N2350/00—Arrangements for fitting catalyst support or particle filter element in the housing
    • F01N2350/02—Fitting ceramic monoliths in a metallic housing
    • F01N2350/04—Fitting ceramic monoliths in a metallic housing with means compensating thermal expansion

Definitions

  • the invention relates to a catalytic exhaust gas detoxification device with a porous, in particular honeycomb structured, monolithic ceramic body with a catalytically active surface coating arranged in a cylindrical metallic outer housing with end-face, in particular conical exhaust gas inlet and outlet connections, the outer housing and the ceramic body having a thermally insulating, preferably made of a so-called inflatable mat, feather pillow is interposed.
  • thermally insulating spring cushion between the ceramic body and the outer housing serves to mount the ceramic body in the outer housing while firstly compensating for the manufacturing tolerances and in particular the thermal expansion of the ceramic body and the housing, taking into account the considerable differences of several hundred degrees in the operating temperature. Because of the aggressiveness of the exhaust gases, which are also moist and contain, among other things, sulfur oxide and nitrogen oxide, it is necessary for the outside to manufacture the housing including the exhaust gas inlet and outlet connections from high-quality stainless steels. This complicates and considerably increases the cost of constructing such exhaust gas detoxification devices.
  • the invention is therefore based on the object of designing a catalytic detoxification device of the type mentioned at the outset in such a way that simple and cheaper materials can be used for the outer housing, including its inlet and outlet connections.
  • a thermally insulating mat which extends to the expandable mat and is covered by a high-temperature-resistant shielding plate, is applied to the inner surfaces of the exhaust gas supply and discharge ports.
  • the outer housing is largely shielded both thermally and from the aggressive exhaust gases by the inflatable mat - is ensured in the entire interior of the housing that neither aggressive components of the exhaust gas can come into contact with the outer housing with its inlet and outlet connections.
  • the temperature that the outer housing reaches during operation is significantly reduced compared to the conventional, non-insulated embodiments, which in turn significantly increases the life of the housing, or in other words, it allows cheaper, simple chrome steel sheet to be used instead of expensive special steels.
  • the outside, in particular welded shielding plate, which is firmly connected to the connecting piece, is encompassed at the inner end by a sliding ring flange of a metallic sealing ring.
  • the construction is particularly simple if you provide a cross-sectional, essentially Z-shaped sealing ring, which is connected with its enlarged outer ring flange, which engages under the front edge of the ceramic body, to the outer housing, which is achieved both by a press fit and by welding the outer housing can be achieved.
  • the inner ring flange of the Z-shaped sealing ring which is smaller in diameter, points outwards parallel to the inner surface of the exhaust gas inlet and outlet and overlaps the inner edge of the shielding plate with a clamp fit.
  • the end edges of the inflatable mat are bordered with a folded sealing strip, which can consist, for example, of a metal foil, a ceramic fiber band or a woven ceramic or glass fiber mat.
  • Such a sealing strip possibly additionally glued to the inflatable mat, the folded edges of which are jammed between the ceramic body and the outer housing, effectively prevents the passage of exhaust gases between the ceramic body and the outer housing, such a penetration via the disadvantages described above also bringing with it the difficulty that With such an exhaust gas flow, there would be a fear of a very rapid unraveling of the expandable mat, which would suffer a considerable loss of tensile strength at higher temperatures compared to the originally solid structure.
  • the shielding plate 6 can move in the axial direction with its considerable thermal changes in length.
  • the temperatures at the shielding plate 6 are much higher than at the metal nozzle 2, which is thermally insulated by the insulating mat 5, which can be constructed, for example, on an aluminum-silicate base.
  • the edges 12 of the inflatable mats 4 which are bent inward over the end edges, are each surrounded by a folded sealing strip 13 made of metal foil, ceramic fiber tape or woven ceramic mat or glass fiber mat, the bent edges of which are jammed between the ceramic body 3 and the outer housing.
  • These sealing strips will Lich passage of exhaust gas between the ceramic body 3 and the outer housing prevented, which, in addition to the insulation mentioned, also prevents the material of the inflatable mat from losing its tensile strength at high temperatures.

Abstract

1. Catalytic exhaust detoxification device with a honeycomb-structured monolithic ceramic body (3), which has a catalytically active surface coating, located in a metallic external housing (1) with a conical exhaust intake and discharge adaptor (2) on the front face, a thermally insulating spring cushion consisting of a so-called expanded mat (4) being interposed between the external housing (1) and the ceramic body (3), characterized in that a thermally insulating mat (5) which extends almost up to the expanded mat (4) and is covered by a shield sheet (6) which is resistant to high temperatures is positioned on the inner surfaces of the exhaust intake and discharge adaptor (2), the shield sheet being permanently connected on the outside to the adaptor (2) and having on the inside end (8) a sliding seat seal which thermally insulates the region between the expanded mats (4, 5) from the external housing (1).

Description

Die Erfindung bezieht sich auf eine katalytische Abgasentgiftungseinrichtung mit einem in einem zylindrischen metallischen Außengehäuse mit stirnseitigen, insbesondere konischen Abgaszu- und abführstutzen angeordneten porösen, insbesondere wabenartig strukturierten monolitischen Keramikkörper mit einer katalytisch wirksamen Oberflächenbeschichtung, wobei dem Außengehäuse und dem Keramikkörper ein thermisch isolierendes, vorzugsweise aus einer sogenannten Blähmatte bestehendes, Federkissen zwischengeordnet ist.The invention relates to a catalytic exhaust gas detoxification device with a porous, in particular honeycomb structured, monolithic ceramic body with a catalytically active surface coating arranged in a cylindrical metallic outer housing with end-face, in particular conical exhaust gas inlet and outlet connections, the outer housing and the ceramic body having a thermally insulating, preferably made of a so-called inflatable mat, feather pillow is interposed.

Die Anordnung eines derartigen thermisch isolierenden Federkissens zwischen dem Keramikkörper und dem Außengehäuse dient der Lagerung des Keramikkörpers im Außengehäuse unter Ausgleich erstens der Fertigungstoleranzen und insbesondere der thermischen Ausdehnung des Keramikkörpers und des Gehäuses, unter Berücksichtigung der erheblichen,mehrere hundert Grad betragen, Unterschiede der Betriebstemperatur. Wegen der Aggressivität der noch dazu feuchten und unter anderem schwefeloxid-und stickoxidhaltigen Abgase ist es dabei erforderlich, das Außengehäuse einsdiießlich der Abgaszu- und abführstutzen aus hochwertigen Edelstählen herzustellen. Dies verkompliziert und verteuert den Aufbau derartiger Abgasentgiftungseinrichtungen erheblich.The arrangement of such a thermally insulating spring cushion between the ceramic body and the outer housing serves to mount the ceramic body in the outer housing while firstly compensating for the manufacturing tolerances and in particular the thermal expansion of the ceramic body and the housing, taking into account the considerable differences of several hundred degrees in the operating temperature. Because of the aggressiveness of the exhaust gases, which are also moist and contain, among other things, sulfur oxide and nitrogen oxide, it is necessary for the outside to manufacture the housing including the exhaust gas inlet and outlet connections from high-quality stainless steels. This complicates and considerably increases the cost of constructing such exhaust gas detoxification devices.

Der Erfindung liegt daher die Aufgabe zugrunde, eine katalytische Abgsentgiftungsvorrichtung der eingangs genannten Art so auszugestalten, daß für das Außengehäuse einschließlich seiner Zu- und Abfuhrstutzen einfache und billigere Werkstoffe verwendet werden können.The invention is therefore based on the object of designing a catalytic detoxification device of the type mentioned at the outset in such a way that simple and cheaper materials can be used for the outer housing, including its inlet and outlet connections.

Zur Lösung dieser Aufgabe ist erfindungsgemäß vorgesehen, daß auf die Innenflächen der Abgaszu- und abführstutzen eine, bis zur Blähmatte reichende thermisch isolierende Matte aufgebracht ist, die von einem hochtemperaturfesten Abschirmblech überdeckt ist.To achieve this object, it is provided according to the invention that a thermally insulating mat, which extends to the expandable mat and is covered by a high-temperature-resistant shielding plate, is applied to the inner surfaces of the exhaust gas supply and discharge ports.

Das Vorsehen einer derartigen thermischen Abschirmung der Zu- und Abführstutzen - das eigentliche zylindrische, ovale od.dgl.Außengehäuse ist bereits durch die Blähmatte weitestgehend sowohl thermisch, als auch gegenüber den aggressiven Abgasen abgeschirmt - ist im gesamten Innenbereich des Gehäuses sichergestellt, daß weder die aggressiven Bestandteile des Abgases in Kontakt mit dem Außengehäuse mit seinen Zu- und Abführstutzen gelangen können. Darüber hinaus wird auch die Temperatur, die das Außengehäuse im Betrieb erreicht, erheblich gegenüber den üblichen, nicht isolierten Ausführungsformen reduziert, was wiederum die Lebensdauer des Gehäuses erheblich vergrößert, oder anders ausgedrückt, es ermöglicht anstelle teuerer Spezialstähle billigeres einfaches Chromstahlblech zu verwenden.The provision of such thermal shielding of the inlet and outlet connections - the actual cylindrical, oval or the like. The outer housing is largely shielded both thermally and from the aggressive exhaust gases by the inflatable mat - is ensured in the entire interior of the housing that neither aggressive components of the exhaust gas can come into contact with the outer housing with its inlet and outlet connections. In addition, the temperature that the outer housing reaches during operation is significantly reduced compared to the conventional, non-insulated embodiments, which in turn significantly increases the life of the housing, or in other words, it allows cheaper, simple chrome steel sheet to be used instead of expensive special steels.

Dabei kann in weiterer Ausgestaltung der Erfindung weiter vorgesehen sein, daß das außenseitig, mit dem Stutzen fest verbundene, insbesondere verschweißte Abschirmblech am inneren Ende mit.Schiebesitz von einem a.nliegenden Ringflansch eines metallischen Dichtrings umfaßt ist. Durch diese Ausbildung werden die erheblichen thermischen Längsdehnungen des Abschirmbleches problemlos aufgefangen und führen zu keinerlei Belastungen der Verbindungsstellen mit dem im Betrieb sich wesentlich weniger erwärmenden Außengehäuse bzw. dessen Zu- und Abführstutzen.It can be further provided in a further embodiment of the invention that the outside, in particular welded shielding plate, which is firmly connected to the connecting piece, is encompassed at the inner end by a sliding ring flange of a metallic sealing ring. With this design, the considerable thermal longitudinal expansions of the shielding plate are easily absorbed and do not lead to any stress on the connection points with the outer housing, which heats up considerably less during operation, or its inlet and outlet connections.

Besonders einfach gestaltet sich der Aufbau dadurch, wenn man einen querschnittlich, im wesentlichen Z-förmigen Dichtring vorsieht, der mit seinem erweiterten, den Stirnrand des Keramikkörpers untergreifenden Außenringflansch dicht mit dem Außengehäuse verbunden ist, was sowohl durch einen Klemmsitz, als auch durch Verschweißen mit dem Außengehäuse erzielt werden kann. Der innere im Durchmesser kleinere Ringflansch des Z-förmigen Dichtringes weist jeweils parallel zur Innenfläche des Abgaszu- oder abführstutzens nach außen und übergreift mit Klemmsitz den Innenrand des Abschirmbleches.The construction is particularly simple if you provide a cross-sectional, essentially Z-shaped sealing ring, which is connected with its enlarged outer ring flange, which engages under the front edge of the ceramic body, to the outer housing, which is achieved both by a press fit and by welding the outer housing can be achieved. The inner ring flange of the Z-shaped sealing ring, which is smaller in diameter, points outwards parallel to the inner surface of the exhaust gas inlet and outlet and overlaps the inner edge of the shielding plate with a clamp fit.

Um ein Durchtreten des Abgases zwischen Keramikkörper und Außengehäuse zu vermeiden, wodurch dieses ja wiederum zu stark thermisch belastet würde und zum anderen die Möglichkeit des Angreifens aggressiver Bestandteile bestünde - dieses Problem stellt sich besonders bei sogenannten Blähmatten, die sich bei höheren Temperaturen um ein mehrfaches gegenüber ihrem ursprünglichen Durchmesser erweitern können, sofern sie nicht aufgrund ihres Klemmsitzes an einer solchen starken Ausdehnung gehindert sind -ist in weiterer Ausgestaltung der Erfindung vorgesehen, daß die Stirnkanten der Blähmatte mit einem umgelegten Dichtstreifen eingefaßt sind, der beispielsweise aus einer Metallfolie, aus einem Keramikfaserband oder einer verwebten Keramik- oder Glasfasermatte bestehen kann.In order to prevent the exhaust gas from passing between the ceramic body and the outer housing, which in turn would cause excessive thermal stress and, on the other hand, there would be the possibility of attacking aggressive constituents - this problem arises particularly in the case of so-called expandable mats, which are several times compared at higher temperatures can expand their original diameter, provided that they are not prevented from such a large expansion due to their clamping fit - it is provided in a further embodiment of the invention that the end edges of the inflatable mat are bordered with a folded sealing strip, which can consist, for example, of a metal foil, a ceramic fiber band or a woven ceramic or glass fiber mat.

Ein solcher, ggf. mit der Blähmatte zusätzlich verklebter Dichtstreifen, dessen umgelegte Ränder zwischen Keramikkörper und Außengehäuse verklemmt sind, verhindert wirksam ein Durchtreten von Abgasen zwischen Keramikkörper und Außengehäuse, wobei ein solches Durchtreten über die vorstehend beschriebenen Nachteile auch die Schwierigkeit mit sich brächte, daß mit einem solchen Abgasstrom ein sehr rasches Ausfasern der Blähmatte zu befürchten wäre, die nämlich bei höheren Temperaturen gegenüber der ursprünglich festen Struktur eine erhebliche Einbuße an Reißfestigkeit erleidet.Such a sealing strip, possibly additionally glued to the inflatable mat, the folded edges of which are jammed between the ceramic body and the outer housing, effectively prevents the passage of exhaust gases between the ceramic body and the outer housing, such a penetration via the disadvantages described above also bringing with it the difficulty that With such an exhaust gas flow, there would be a fear of a very rapid unraveling of the expandable mat, which would suffer a considerable loss of tensile strength at higher temperatures compared to the originally solid structure.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels, der eine teilweise geschnittene Seitenansicht eines Endabschnittes einer erfindungsgemäßen katalytischen Abgasentgiftungsvorrichtung zeigt.Further advantages, features and details of the invention result from the following description of an exemplary embodiment, which shows a partially sectioned side view of an end section of a catalytic exhaust gas detoxification device according to the invention.

In dem im wesentlichen zylindrischen Außengehäuse 1,an welches konisch sich verjüngende Abgaszu- und abführstutzen 2 sich anschließen, von denen in-der Teilzeichnung nur einer zu erkennen ist, sind monolitische, wabenartig strukturierte Keramikkörpr 3 gehaltert, deren Oberfläche mit einer katalytisch wirksamen Oberflächenbeschichtung versehen ist. Zur Halterung dieser Keramikkörper sind sogenannte Blähmatten 4 vorgesehen, d.h. mit steigernder Temperatur expandierende feuerfeste Fasermatten, die für eine zentrierte Halterung im Außengehäuse auch unter Berücksichtigung der stark unterschiedlichen Ausdehnung im Betrieb der Abgasentgifiungsvorrichtung sorgen.In the essentially cylindrical outer housing 1, to which conically tapering exhaust gas inlet and outlet connections 2 are connected, of which only one can be seen in the partial drawing, monolithic, honeycomb-structured ceramic bodies 3 are held, the surface of which is provided with a catalytically active surface coating is. So-called expandable mats 4 are provided for holding these ceramic bodies, ie refractory fiber mats which expand with increasing temperature and which are suitable for a centered holder in the outer housing, also taking into account the strongly below different expansion in the operation of the exhaust gas degassing.

Um für das Außengehäuse 1 und die anschließend Abgaszu-und abführstutzen 2, billigere, einfache Stahlbleche verwenden zu können, ist zunächst vorgesehen, daß die Innenflächen der Abgaszu- und abführstutzen 2 mit thermisch isolierenden Matten 5 überdeckt sind, die ihrerseits von einem hochtemperaturfesten Abschirmblech 6 überdeckt kwden. Dieses Abschirmblech ist an der Außenseite mit seinem am Stutzen'2 anliegenden Außenflansch 7 unmittelbar mit dem Stutzen 2 verschweißt, während der innere Rand 8 mit einem Schiebesitz klemmend unter den nach außen weisenden Ringflansch 9 eines im wesentlichen Z-förmigen gebogenen Dichtrings 10 greift, dessen Außenflansch 11 dichtend am Außengehäuse 1 anliegt, ggf. mit diesem verschweißt ist. Durch diesen Schiebesitz, der durch den Doppelpfeil angedeutet ist, kann sich das Abschirmblech 6 in axialer Richtung bei seinen erheblichen thermischen Längenänderungen bewegen. Die Temperaturen am Abschirmblech 6 liegen ja wesentlich höher als am Metallstutzen 2, der durch die Isoliermatte 5, die beispielsweise auf einer Aluminium-Silikat-Basis aufgebaut sein kann, thermisch isoliert ist.In order to be able to use cheaper, simple steel sheets for the outer housing 1 and the subsequent exhaust gas supply and discharge connection pieces 2, it is initially provided that the inner surfaces of the exhaust gas supply and discharge connection pieces 2 are covered with thermally insulating mats 5, which in turn are covered by a high-temperature-resistant shielding sheet 6 covered. This shielding plate is directly welded to the socket 2 on the outside with its outer flange 7 resting against the socket 2, while the inner edge 8 clamps with a sliding fit under the outwardly facing ring flange 9 of an essentially Z-shaped curved sealing ring 10, the latter Outer flange 11 lies sealingly on the outer housing 1, possibly welded to it. Due to this sliding seat, which is indicated by the double arrow, the shielding plate 6 can move in the axial direction with its considerable thermal changes in length. The temperatures at the shielding plate 6 are much higher than at the metal nozzle 2, which is thermally insulated by the insulating mat 5, which can be constructed, for example, on an aluminum-silicate base.

Zur weiteren, sowohl thermisch als auch korrosionshindernden Isolierung des Gehäuses 1 ist zusätzlich vorgesehen, daß die über die Stirnkanten nach innen gebogenen Ränder 12 der Blähmatten 4 jeweils von einem umgelegten Dichtstreifen 13 aus Metallfolie, Keramikfaserband oder verwebter Keramikmatte oder Glasfasermatte eingefaßt sind, dessen umgebogene Ränder zwischen dem Keramikkörper 3 und dem Außengehäuse verklemmt sind. Durch diese Dichtstreifen wird jeliches Durchtreten von Abgas zwischen dem Keramikkörper 3 und dem Außengehäuse verhindert, womit außer der genannten Isolierung,auch ein Ausblasen des bei hohen Temperaturen seine Reißfestigkeit weitestgeherd verlierenden Materials der Blähmatte verhindert wird.For further, both thermal and corrosion-preventing insulation of the housing 1, it is additionally provided that the edges 12 of the inflatable mats 4, which are bent inward over the end edges, are each surrounded by a folded sealing strip 13 made of metal foil, ceramic fiber tape or woven ceramic mat or glass fiber mat, the bent edges of which are jammed between the ceramic body 3 and the outer housing. These sealing strips will Lich passage of exhaust gas between the ceramic body 3 and the outer housing prevented, which, in addition to the insulation mentioned, also prevents the material of the inflatable mat from losing its tensile strength at high temperatures.

Claims (5)

1. Katalytische Abgasentgiftungsvorrichtung mit einem in einem metallischen Außengehäuse mit stirnseitigen, insbesondere konischen Abgaszu- und -abführstutzen angeordneten porösen, insbesondere wabenartig strukturierten monolitischen Keramikkörper mit einer katalytisch wirksamen Oberflächenbeschichtung, wobei dem Außengehäuse und dem Keramikkörper ein thermisch isolierendes, vorzugsweise aus einer sogenannten Blähmatte bestehendes Federkissen zwischengeordnet ist, dadurch gekennzeichnet, daß auf die Innenflächen der Abgaszu- und -abführstutzen (2) eine thermisch isolierende Matte (5) aufgebracht ist, die von einem hochtemperaturfesten Abschirmblech (6) überdeckt ist.1. Catalytic exhaust gas detoxification device with a porous, in particular honeycomb structured monolithic ceramic body with a catalytically active surface coating arranged in a metallic outer housing with frontal, in particular conical exhaust gas inlet and outlet connections, the outer housing and the ceramic body having a thermally insulating, preferably consisting of a so-called expandable mat Spring cushion is interposed, characterized in that a thermally insulating mat (5), which is covered by a high-temperature-resistant shielding plate (6), is applied to the inner surfaces of the exhaust gas inlet and outlet connections (2). 2. Abgasentgiftungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das außenseitig mit dem Stutzen (2) fest verbundene, insbesondere verschweißte Abschirmblech (6) am inneren Ende (8) mit Schiebesitz von einem anliegenden Ringflansch (9) eines metallischen Dichtrings (10) umfaßt ist.2. Exhaust gas detoxification device according to claim 1, characterized in that the outside with the socket (2) firmly connected, in particular welded shielding plate (6) at the inner end (8) with a sliding fit of an adjacent ring flange (9) of a metallic sealing ring (10) is. 3. Abgasentgiftungsvorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß der querschnittlich i wesentlichen Z-förmige Dichtring (10) mit seinem erweiterten, den Stirnrand des Keramikkörpers (3) untergreifenden Außenringflansch (11) dicht mit dem Außengehäuse (1) verbunden ist.3. exhaust gas detoxification device according to claim 2, characterized in that the cross-sectionally i essential Z-shaped sealing ring (10) with its enlarged, the end edge of the ceramic body (3) engaging under the outer ring flange (11) is tightly connected to the outer housing (1). 4. Abgasentgiftungsvorrichtung insbesondere von einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Stirnkanten (12) der Blähmatte (4) mit einem umgelegten Dichtstreifen (13) eingefaßt sind.4. exhaust gas detoxification device in particular of one of claims 1 to 3, characterized in that the end edges (12) of the inflatable mat (4) are bordered with a folded sealing strip (13). 5. Abgasentgiftungsvorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die umgelegten Ränder des ggf. mit der Blähmatte verklebten Dichtstreifens (13) zwischen Keramikkörper (3) und Außengehäuse (1) verklemmt sind.5. Exhaust gas detoxification device according to claim 4, characterized in that the folded edges of the sealing strip (13), which may be glued to the expansion mat, are clamped between the ceramic body (3) and the outer housing (1).
EP85110292A 1984-09-01 1985-08-17 Catalytic exhaust gas detoxication device Expired EP0176722B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85110292T ATE34429T1 (en) 1984-09-01 1985-08-17 CATALYTIC EMISSION DETOXIFIER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843432283 DE3432283A1 (en) 1984-09-01 1984-09-01 CATALYTIC EXHAUST GAS DETECTING DEVICE
DE3432283 1984-09-01

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EP0176722A1 true EP0176722A1 (en) 1986-04-09
EP0176722B1 EP0176722B1 (en) 1988-05-18

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EP (1) EP0176722B1 (en)
AT (1) ATE34429T1 (en)
DE (1) DE3432283A1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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EP0193072B1 (en) * 1985-02-22 1989-04-12 Leistritz Aktiengesellschaft Catalytic-emission control device
EP0363681A2 (en) * 1988-10-12 1990-04-18 ROTH-TECHNIK GMBH & Co. Forschung für Automobil- und Umwelttechnik Catalyst
DE3834779A1 (en) * 1988-10-12 1990-04-19 Roth Technik Gmbh Component kit for a catalytic converter
EP1607596A1 (en) * 2004-06-14 2005-12-21 Nissan Motor Company, Limited Catalytic converter and method of making the same
WO2007059850A1 (en) * 2005-11-25 2007-05-31 Emcon Technologies Germany (Augsburg) Gmbh Double-walled funnel for an exhaust system
WO2010123251A3 (en) * 2009-04-21 2011-01-27 ㈜엘지하우시스 Porous ceramic structure, and dehumidification/humidification apparatus comprising same
EP2378091A1 (en) * 2010-04-15 2011-10-19 J. Eberspächer GmbH & Co. KG Exhaust-gas treatment device
US8763375B2 (en) 2010-08-19 2014-07-01 J. Eberspaecher Gmbh & Co. Kg Exhaust gas cleaning device, exhaust system, removal method
US9222392B2 (en) 2010-04-15 2015-12-29 Eberspaecher Exhaust Technology Gmbh & Co. Kg Exhaust gas treatment device
CN107084020A (en) * 2016-02-16 2017-08-22 本田技研工业株式会社 The waste gas purification apparatus of internal combustion engine

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Publication number Priority date Publication date Assignee Title
EP0193072B1 (en) * 1985-02-22 1989-04-12 Leistritz Aktiengesellschaft Catalytic-emission control device
FR2609308A1 (en) * 1987-01-02 1988-07-08 Eberspaecher J DEVICE FOR THE CATALYTIC PURIFICATION OF THE EXHAUST GASES OF MOTORS OF VEHICLES
EP0275565A1 (en) * 1987-01-02 1988-07-27 Firma J. Eberspächer Catalytic purification device for vehicle exhaust gases
EP0363681A2 (en) * 1988-10-12 1990-04-18 ROTH-TECHNIK GMBH & Co. Forschung für Automobil- und Umwelttechnik Catalyst
DE3834779A1 (en) * 1988-10-12 1990-04-19 Roth Technik Gmbh Component kit for a catalytic converter
EP0363681A3 (en) * 1988-10-12 1991-07-03 ROTH-TECHNIK GMBH & Co. Forschung für Automobil- und Umwelttechnik Catalyst
EP1607596A1 (en) * 2004-06-14 2005-12-21 Nissan Motor Company, Limited Catalytic converter and method of making the same
WO2007059850A1 (en) * 2005-11-25 2007-05-31 Emcon Technologies Germany (Augsburg) Gmbh Double-walled funnel for an exhaust system
WO2010123251A3 (en) * 2009-04-21 2011-01-27 ㈜엘지하우시스 Porous ceramic structure, and dehumidification/humidification apparatus comprising same
CN102405377A (en) * 2009-04-21 2012-04-04 乐金华奥斯有限公司 Porous ceramic structure, and dehumidification/humidification apparatus comprising same
US8657265B2 (en) 2009-04-21 2014-02-25 Lg Hausys, Ltd. Porous ceramic structure, and dehumidification/humidification apparatus comprising same
CN102405377B (en) * 2009-04-21 2014-05-28 乐金华奥斯有限公司 Porous ceramic structure, and dehumidification/humidification apparatus comprising same
EP2378091A1 (en) * 2010-04-15 2011-10-19 J. Eberspächer GmbH & Co. KG Exhaust-gas treatment device
US20110256032A1 (en) * 2010-04-15 2011-10-20 J. Eberspaecher Gmbh & Co. Kg Exhaust Gas Treatment Device
US9222392B2 (en) 2010-04-15 2015-12-29 Eberspaecher Exhaust Technology Gmbh & Co. Kg Exhaust gas treatment device
US8763375B2 (en) 2010-08-19 2014-07-01 J. Eberspaecher Gmbh & Co. Kg Exhaust gas cleaning device, exhaust system, removal method
CN107084020A (en) * 2016-02-16 2017-08-22 本田技研工业株式会社 The waste gas purification apparatus of internal combustion engine

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ATE34429T1 (en) 1988-06-15
DE3432283A1 (en) 1986-03-13

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