DE2313156A1 - EXHAUST GAS PURIFICATION DEVICE - Google Patents
EXHAUST GAS PURIFICATION DEVICEInfo
- Publication number
- DE2313156A1 DE2313156A1 DE2313156A DE2313156A DE2313156A1 DE 2313156 A1 DE2313156 A1 DE 2313156A1 DE 2313156 A DE2313156 A DE 2313156A DE 2313156 A DE2313156 A DE 2313156A DE 2313156 A1 DE2313156 A1 DE 2313156A1
- Authority
- DE
- Germany
- Prior art keywords
- exhaust gas
- monolith
- housing
- cleaning device
- gas cleaning
- 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.)
- Pending
Links
- 238000000746 purification Methods 0.000 title 1
- 239000003054 catalyst Substances 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 4
- 239000010425 asbestos Substances 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 239000011491 glass wool Substances 0.000 claims description 2
- 238000012856 packing Methods 0.000 claims description 2
- 229910052895 riebeckite Inorganic materials 0.000 claims description 2
- 239000010410 layer Substances 0.000 claims 2
- 239000011229 interlayer Substances 0.000 claims 1
- 239000011435 rock Substances 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 239000002184 metal Substances 0.000 description 11
- 229910052751 metal Inorganic materials 0.000 description 11
- 239000007789 gas Substances 0.000 description 9
- 239000000919 ceramic Substances 0.000 description 7
- 238000010276 construction Methods 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 210000003027 ear inner Anatomy 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
-
- 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
- F01N2260/02—Exhaust treating devices having provisions not otherwise provided for for cooling the device
- F01N2260/022—Exhaust treating devices having provisions not otherwise provided for for cooling the device using air
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Description
ί -ί -
DEUTSCHE GOLD- UND SILBER-SOHEIDjSANSTALT VORMALS ROESSLER 6 Frankfr.rt am Main, Weissfrauenstrasse 9GERMAN GOLD AND SILVER SOHEIDJSANSTALT FORMERLY ROESSLER 6 Frankfr.rt am Main, Weissfrauenstrasse 9
AbgasreinigungsvorrichtungExhaust gas cleaning device
Zur Reinigung von Abgasen hinter Verbrennungskraftmaschinen werden u.a. katalytische Nachverbrennungsanlagen eingesetzt. Diese Geräte bestehen im allgemeinen aus einem metallischen Gehäuse, in das Katalysatoren in geeigneter Form eingebracht sind. Als Katalysator können Schüttkörper verwendet werden oder aber imprägnierte keramische Körper mit von-Gas durchströmten engen Kanälen, in denen die Abgas-Nachverbrennung erfolgt. Diese Körper können aus einem Stück (sogenannte Monolithe) bestehen. Der Monolith aus keramischem Material muss in dem Metallgehäuse verankert werden. Es sind Konstruktionen bekannt, in denen der Monolith mit Zement eingekittet ist. Ein Nachteil dieser Befestigungsart ist, dass einmal durch die mechanischen Erschütterungen, zum anderen durch die mit hoher Impulsfolge aus den Zylindern austretenden Verbrennungsgase die Zementverbindung stark beansprucht wird und brechen kann. Hinzu kommt die unterschiedliche Wärmedehnung von Keramik und Metall, die bei hohen Temperaturen das Metallgehäuse vom starr eingekitteten Keramikkern abhebt.Catalytic post-combustion systems, among other things, are used to clean exhaust gases behind internal combustion engines. These devices generally consist of a metallic housing into which catalysts are placed in a suitable form. Bulk bodies or impregnated ceramic bodies with narrow channels through which gas flows and in which the exhaust gas afterburning takes place can be used as the catalyst. These bodies can consist of one piece (so-called monoliths). The monolith made of ceramic material must be anchored in the metal housing. Constructions are known in which the monolith is cemented in place. A disadvantage of this type of fastening is that, on the one hand, the mechanical vibrations and, on the other hand, the combustion gases emerging from the cylinders with a high pulse sequence, the cement connection is heavily stressed and can break. In addition, there is the different thermal expansion of ceramic and metal, which at high temperatures lifts the metal housing from the rigidly cemented ceramic core.
Andere Konstruktionen pressen den Monolithen mit einer elastischen Masse zwischen Gehäuse und Körper ein. Diese Masse muss unter so hohem Druck gehalten werden, dass sie trotz der wesentlich grösseren Wärmedehnung des Gehäuses bei hoher Temperatur den Monolithen noch ausreichend fest hält. Bei längerer Betriebszeit kann sich der Stahlmantel des Gehäuses so weit dehnen, dass die Vorspannung auf den keramischen Monolithen nachlässt und dieser damit nicht mehr ausreichend fest im Gehäuse verankert ist.Other constructions press the monolith with an elastic one Ground between the housing and the body. This mass must be kept under such high pressure that it can be in spite of the substantial greater thermal expansion of the housing at high temperature still holds the monolith sufficiently tight. For longer periods of operation the steel casing of the housing can expand so far that the preload on the ceramic monolith decreases and this so that it is no longer anchored sufficiently firmly in the housing.
Die Abgasreinigungsvorrichtung gemäss der Erfindung ist gekennzeichnet durch ein längliches, an einem Ende mit einer Abgaseintrittsöffnung, am anderen Ende mit einer Abgasaustrittsöffnung versehenes Gehäuse zur Aufnahme eines Katalysatormonolithen, mindestens zwei im Abstand im Gehäuse angeordnete und an ihmThe exhaust gas cleaning device according to the invention is characterized by an elongated one with an exhaust gas inlet opening at one end and an exhaust gas outlet opening at the other end provided housing for receiving a catalyst monolith, at least two spaced apart in the housing and on it
409838/06U409838 / 06U
befestigte Stege, mindestens eine, vorzugsweise am stromaufwärti·*· gen Steg befestigte und am stromabwärtigen Steg verschieblich gelagerte Halterungsstange sowie einen in Richtung seiner Strömungskanäle mit Aufnahmebohrungen für die Halterungsstangen und eine diese umgebende elastische Zwischenschicht versehenen Monolithkatalysator, welcher auf den Stangen durch die unter Pressung stehende Zwischenschicht gehaltert wird.attached webs, at least one, preferably on the upstreami * * Gen web attached and displaceably mounted on the downstream web support rod and one in the direction of its flow channels with receiving bores for the support rods and one Monolith catalyst provided with this surrounding elastic intermediate layer, which is held on the rods by the intermediate layer under pressure.
Der Monolith kann dabei gegenüber dem Gehäuse mittels einer Packung oder eines Labyrinths abgedichtet sein. Es genügt aber auch, dass der Spalt zwischen Gehäuse und Monolithen kleiner als die Hälfte des Durchmessers der Strömungskanäle des Monolithen ausgeführt ist.The monolith can be compared to the housing by means of a packing or a labyrinth to be sealed. But it is also sufficient that the gap between the housing and the monolith is smaller than half the diameter of the flow channels of the monolith is carried out.
Der Vorteil der elastischen Zwischenlage zwischen Halterungsstange und Monolithen liegt in der wirksamen Dämpfung der von der Abgaspulsfolge des Motors herrührenden Stösse. Die für die elastische Aufhängung des Monolithen verwendete Zwischenschicht kann aus beliebigen, Rückstellkräfte erzeugenden temperaturfesten Stoffen bestehen. Bevorzugt wird ein Drahtgewirk bzw. -gestrick, Stein-, Asbest- oder Glaswolle, Fiberfrax o.a. eingesetzt.The advantage of the elastic intermediate layer between the support rod and monolith lies in the effective damping of the exhaust pulse train shocks from the engine. The one for the elastic The intermediate layer used to suspend the monolith can be made from any temperature-resistant substances that generate restoring forces exist. A wire mesh or knitted fabric, stone, Asbestos or glass wool, Fiberfrax or others are used.
Das Gehäuse kann, je nach Bedarf, mit einem Wärmeisoliermantel oder mit Kühlrippen: versehen sein.The housing can, depending on requirements, be provided with a thermal insulation jacket or with cooling fins.
Die Erfindung wird nachfolgend in Verbindung mit der Zeichnung näher erläutert. Es zeigenThe invention is explained in more detail below in connection with the drawing. Show it
Fig. 1 eine zylindrische Vorrichtung gemäss Erfindung1 shows a cylindrical device according to the invention
und
Fig. 2-4 bevorzugte Ausbildungen am Spalt zwischen Gehäuseand
2-4 preferred configurations at the gap between the housing
und Katalysatormonolith.and catalyst monolith.
Die in Fig. 1 dargestellte Haltevorrichtung vermeidet die Nachteile bekannter Abgasreinigungsvorrichtungen ohne den Vorteil der elastischen Zwischenlage zwischen Metallteilen und Monolithkeramik aufzugeben. Der Monolith 1 wird von einer Metallstange 2 gehalten. Zwischen beiden ist unter Druck die elastische Masse 3 (Fiberfrax-The holding device shown in Fig. 1 avoids the disadvantages known exhaust gas cleaning devices without the advantage of the elastic intermediate layer between metal parts and monolith ceramics to give up. The monolith 1 is held by a metal rod 2. The elastic mass 3 (Fiberfrax-
' - 3 409838/06U '- 3 409838 / 06U
- 3 - '■■ ■ "- 3 - '■■ ■ "
fasern) eingebracht. welche durch Reibungskräfte an der Metallstange und am Monolithen gehalten wird. Die Metallstange ist über die Stege h fest mit dem Gehäuse verbunden. In dem Steg 5 ist sie verschieblich gelagert. Die Druckstösse des Abgases werden insbesondere durch die elastische Zwischenlage, aber auch durch die Elastizität von Metallstange und Steg abgefangen. Da der keramische Monolith nur geringe Wärmedehnung zeigt, lässt die Anpresskraft zwischen Stange und Monolith auch bei hoher Temperatur nicht nach. Das bei anderer. Konstruktionen gefürchtete Lockern der Verbindung von Metall zu Keramik kann nicht auftreten. Da das Metallgehäuse keine Haltefunktionen übernehmen muss, kann der Querschnitt beliebig gewählt werden (Ansichten A, A'). Bei runden Gehäusequerschnitten wird eine Haltestange verwendet. Bei länglichen Gehäusequer schnitt en können zwei und mehr Haltestangen eingesetzt werden.fibers) introduced. which is held by frictional forces on the metal rod and on the monolith. The metal rod is firmly connected to the housing via the webs h. It is slidably mounted in the web 5. The pressure surges of the exhaust gas are absorbed in particular by the elastic intermediate layer, but also by the elasticity of the metal rod and web. Since the ceramic monolith shows only slight thermal expansion, the contact pressure between the rod and the monolith does not decrease even at high temperatures. That with others. Constructions dreaded loosening of the connection between metal and ceramic cannot occur. Since the metal housing does not have to take on any holding functions, the cross-section can be selected as desired (views A, A '). A support rod is used for round housing cross-sections. Two or more handrails can be used for elongated housing cross-sections.
Die Art der Abdichtung gegen das Gehäuse kann frei gewählt werden. Es sind sowohl Labyrinthe (Fig. 2) als auch Packungen (Fig. 3) verwendbar. Eine besonders wirkungsvolle Form zur Nutzung des gesamten Katalysatorvolumens stellt ein Einpassen des Monolithen mit geringem Spiel in das Gehäuse dar (Fig. 4). Wenn der Wandabständ kleiner als die Hälfte des Durchmessers der Strömungskanäle gewählt wird, ist bereits eine ausreichende Abdichtung erreicht. Die Aussenflache des Monolithen dient dann noch als wirksame katalytisch^ Oberfläche. Während des Betriebes kann für eine gute Wärmeabfuhr gesorgt werden, um eine überhitzung des Katalysators zu vermeiden. Der im vorliegenden Fall ohne Isolation im Metallgehäuse sitzende Monolith führt einen grossen Teil der Reaktionswärme über die Wand ab. Die Kühlwirkung kann noch durch Kühlrippen am Gehäuse verstärkt werden·The type of seal against the housing can be chosen freely. Both labyrinths (Fig. 2) and packs (Fig. 3) can be used. A particularly effective way of using the total catalyst volume represents a fitting of the monolith with little play in the housing (Fig. 4). When the wall distance If less than half the diameter of the flow channels is selected, this is already a sufficient seal achieved. The outer surface of the monolith then serves as a effective catalytic ^ surface. Good heat dissipation can be ensured during operation to prevent overheating to avoid the catalyst. The monolith, which in the present case is seated in the metal housing without insulation, has a large one Part of the heat of reaction from the wall. The cooling effect can be enhanced by cooling fins on the housing
409838/06U409838 / 06U
Claims (4)
Dr.Kr-P13.3.1.973
Dr Kr-P
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2313156A DE2313156A1 (en) | 1973-03-16 | 1973-03-16 | EXHAUST GAS PURIFICATION DEVICE |
| US450518A US3926565A (en) | 1973-03-16 | 1974-03-12 | Apparatus for cleaning exhaust gases |
| GB1116274A GB1442089A (en) | 1973-03-16 | 1974-03-13 | Emission-control unit |
| JP49028978A JPS5069420A (en) | 1973-03-16 | 1974-03-13 | |
| SE7403532A SE397992B (en) | 1973-03-16 | 1974-03-15 | EXHAUST CLEANING DEVICE INTENDED TO INCLUDE A CATALYST MONOLITE |
| FR7408850A FR2221619B1 (en) | 1973-03-16 | 1974-03-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2313156A DE2313156A1 (en) | 1973-03-16 | 1973-03-16 | EXHAUST GAS PURIFICATION DEVICE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2313156A1 true DE2313156A1 (en) | 1974-09-19 |
Family
ID=5874982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2313156A Pending DE2313156A1 (en) | 1973-03-16 | 1973-03-16 | EXHAUST GAS PURIFICATION DEVICE |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3926565A (en) |
| JP (1) | JPS5069420A (en) |
| DE (1) | DE2313156A1 (en) |
| FR (1) | FR2221619B1 (en) |
| GB (1) | GB1442089A (en) |
| SE (1) | SE397992B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4169127A (en) * | 1976-12-01 | 1979-09-25 | T. I. Silencers Limited | Containers for catalysts for exhaust emission control |
| WO2009071316A1 (en) * | 2007-12-06 | 2009-06-11 | Emcon Technologies Germany (Augsburg) Gmbh | Exhaust gas treatment device |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4462812A (en) * | 1982-12-08 | 1984-07-31 | General Motors Corporation | Ceramic monolith particulate trap including filter support |
| US4617176A (en) * | 1984-09-13 | 1986-10-14 | Minnesota Mining And Manufacturing Company | Catalytic converter for automotive exhaust system |
| US4592899A (en) * | 1984-12-26 | 1986-06-03 | Texaco Inc. | Smoke filter with frangible supported filter bed |
| US6217832B1 (en) * | 1998-04-30 | 2001-04-17 | Catalytica, Inc. | Support structures for a catalyst |
| WO2002038920A2 (en) * | 2000-11-13 | 2002-05-16 | Catalytica Energy Systems, Inc. | Thermally tolerant support structure for a catalytic combustion catalyst |
| US7309755B2 (en) * | 2005-08-24 | 2007-12-18 | General Electric Company | Method of producing polycarbonate articles by rotation molding and rotation molded articles made by the method |
| WO2007122779A1 (en) * | 2006-04-20 | 2007-11-01 | Ibiden Co., Ltd. | Honeycomb structure, process for producing honeycomb structure, casing and exhaust gas purifier |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3124930A (en) * | 1964-03-17 | Exhaust system | ||
| DE98733C (en) * | ||||
| US1824078A (en) * | 1929-01-23 | 1931-09-22 | Frederick C Fischer | Device for removing carbon monoxide from exhaust gases |
| US1932927A (en) * | 1931-04-20 | 1933-10-31 | Frederick C Fischer | Device for converting carbon monoxide |
| US3248188A (en) * | 1963-07-22 | 1966-04-26 | Continental Motors Corp | Flame arrester |
| US3211534A (en) * | 1963-12-19 | 1965-10-12 | Trw Inc | Exhaust control apparatus |
| US3362783A (en) * | 1963-12-23 | 1968-01-09 | Texaco Inc | Treatment of exhaust gases |
| US3492098A (en) * | 1965-12-01 | 1970-01-27 | Universal Oil Prod Co | Multiple section catalyst unit |
| US3558286A (en) * | 1969-01-13 | 1971-01-26 | Gourdine Systems Inc | Electrogasdynamic precipitator with catalytic reaction |
| US3692497A (en) * | 1971-05-20 | 1972-09-19 | Engelhard Min & Chem | Catalytic exhaust gas treatment apparatus |
| US3773894A (en) * | 1971-07-22 | 1973-11-20 | Exxon | Nitrogen oxide conversion using reinforced nickel-copper catalysts |
| US3798006A (en) * | 1971-12-14 | 1974-03-19 | Tenneco Inc | Catalytic converter for exhuast gases |
-
1973
- 1973-03-16 DE DE2313156A patent/DE2313156A1/en active Pending
-
1974
- 1974-03-12 US US450518A patent/US3926565A/en not_active Expired - Lifetime
- 1974-03-13 JP JP49028978A patent/JPS5069420A/ja active Pending
- 1974-03-13 GB GB1116274A patent/GB1442089A/en not_active Expired
- 1974-03-15 FR FR7408850A patent/FR2221619B1/fr not_active Expired
- 1974-03-15 SE SE7403532A patent/SE397992B/en unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4169127A (en) * | 1976-12-01 | 1979-09-25 | T. I. Silencers Limited | Containers for catalysts for exhaust emission control |
| WO2009071316A1 (en) * | 2007-12-06 | 2009-06-11 | Emcon Technologies Germany (Augsburg) Gmbh | Exhaust gas treatment device |
| US9388724B2 (en) | 2007-12-06 | 2016-07-12 | Faurecia Emissions Control Technologies, Germany Gmbh | Exhaust gas treatment device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5069420A (en) | 1975-06-10 |
| GB1442089A (en) | 1976-07-07 |
| US3926565A (en) | 1975-12-16 |
| FR2221619A1 (en) | 1974-10-11 |
| FR2221619B1 (en) | 1977-06-17 |
| SE397992B (en) | 1977-11-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OHJ | Non-payment of the annual fee |