EP2986358A1 - Catalyst module with catalyst elements - Google Patents

Catalyst module with catalyst elements

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Publication number
EP2986358A1
EP2986358A1 EP14723668.1A EP14723668A EP2986358A1 EP 2986358 A1 EP2986358 A1 EP 2986358A1 EP 14723668 A EP14723668 A EP 14723668A EP 2986358 A1 EP2986358 A1 EP 2986358A1
Authority
EP
European Patent Office
Prior art keywords
catalyst
module
elements
flue gas
catalyst module
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.)
Withdrawn
Application number
EP14723668.1A
Other languages
German (de)
French (fr)
Inventor
Kurt OREBOVSKY
Michael AUMANN
Andreas Hartung
Thomas Krainer
Thomas Nagl
Gerhard PÖLZL
Mario Schweiger
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.)
Ibiden Porzellanfabrik Frauenthal GmbH
Original Assignee
Ibiden Porzellanfabrik Frauenthal GmbH
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 Ibiden Porzellanfabrik Frauenthal GmbH filed Critical Ibiden Porzellanfabrik Frauenthal GmbH
Publication of EP2986358A1 publication Critical patent/EP2986358A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/54—Nitrogen compounds
    • B01D53/56—Nitrogen oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B01D53/8625—Nitrogen oxides
    • B01D53/8631—Processes characterised by a specific device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/88—Handling or mounting catalysts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9431—Processes characterised by a specific device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
    • B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—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 methods of operation; Control
    • F01N3/20—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 methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/90—Physical characteristics of catalysts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/90—Physical characteristics of catalysts
    • B01D2255/915—Catalyst supported on particulate filters
    • B01D2255/9155—Wall flow filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/90—Physical characteristics of catalysts
    • B01D2255/92—Dimensions
    • 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
    • F01N2260/14—Exhaust treating devices having provisions not otherwise provided for for modifying or adapting flow area or back-pressure
    • 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
    • F01N2340/00—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses
    • 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/14—Plurality of outlet tubes, e.g. in parallel or with different length
    • 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/16—Plurality of inlet tubes, e.g. discharging into different chambers
    • 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/18—Structure or shape of gas passages, pipes or tubes the axis of inlet or outlet tubes being other than the longitudinal axis of apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to a catalyst module with internals of catalyst elements.
  • SCR catalysts represent the state of the art for the de-icing of flue gases. This makes a significant contribution to the reduction of ground-level ozone, acid rain and the greenhouse effect. This technology is used in thermal power plants and waste incineration plants as well as in internal combustion engines and many industrial sectors.
  • catalysts are also used, for example, for the degradation of dioxins and furans, which has become particularly prevalent in waste incineration plants as a technical standard.
  • Catalyst elements are offered, for example, in the form of hollow extruded honeycomb bodies or in the form of carrier materials whose surface is provided with a catalytic layer and which are called plate catalysts. Further variants are, for example, catalysts in pellet form, zeolite catalysts in which the active layer is applied to a ceramic support by means of a washcoat process, and catalysts designed as wave-shaped plates.
  • the individual catalyst elements are packed in parallelepipedic catalyst modules (for example steel modules), which are referred to as catalyst layer in the composite. Seals are formed between the individual catalyst modules and between the catalyst modules and the wall of the reactor housing accommodating the modules provided to forcibly guide the flue gas stream through the cata ⁇ torieri.
  • parallelepipedic catalyst modules for example steel modules
  • a key performance parameter represents the einher- continuous pressure loss by the installation of the catalyst elements in the catalyst module.
  • the aim is to keep this unwanted ⁇ desired pressure drop as low as possible.
  • the pressure loss is influenced inter alia by the choice of the geometry of the catalyst elements.
  • the choice of geometry is subject to production-related and process-related limits.
  • the size of the SCR reactor also directly affects the pressure loss. There are limits to the freedom of design: on the one hand by on-site restrictions, in particular with later retrofitted SCR reactors, and on the other hand by economic considerations.
  • the object of the invention is to provide catalyst modules with the greatest possible catalytically active surface area for a given limited reactor cross-section while at the same time minimizing the pressure loss caused by the catalyst elements.
  • This object is achieved in that the inflow surface of the individual catalyst elements is greater than the flow inlet surface of the Kataly- satormoduls, wherein the module inlet surface of the main flow direction facing surface of the module side is defined, and wherein the catalyst elements are positioned in the catalyst module such that they are of the Direction of the inlet-side and / or the outlet-side flow direction are flowing through the flue gas deviating.
  • the catalyst elements are preferably provided, which are flowed through in parallel to the off ⁇ direction of the incident side and / or the exit-side flow direction of the flue gas.
  • At least one flue gas channel is arranged on the inlet side of the catalyst module, which leads the flue gas into the catalyst module, the module side facing the main flow direction being defined as the inlet side of the catalyst module.
  • At least one flue gas duct is arranged on the outlet side of the catalyst module, which leads the flue gas out of the catalyst module, wherein the module side remote from the main flow direction is defined as the outlet side of the catalyst module.
  • the per se conventional structure of a catalyst module 1 is determined by the fact that the flue gas stream S flows within the catalyst module 1 without deflecting the flow direction from the inlet side 1 'of the catalyst module 1 through the channels 3, 4 of the catalyst elements 2 to the outlet side 1 "of the catalyst module 1.
  • the catalyst elements 2 deviating from the previous practice with respect to the inlet side 1 'and / or the outlet side 1 "or the flow direction is repositioned in the catalyst module 1.
  • the flow through the catalyst elements 2 thus takes place in a respect to the the inlet-side and / or the outlet-side flow direction deviating direction, for example offset by 90 °.
  • the flue gas is passed from the inlet side 1 'of the catalyst module 1 via a plurality of openings and a plurality of channels 3 to the catalyst elements 2.
  • the catalyst elements 2 are arranged so that they are aligned with respect to the main flow direction S of the flue gas at the module inlet side 1 'offset by 90 °.
  • the flue gas opens again into a channel 4, via which the flue gas is led to the outlet side 1 "of the catalyst module 1.
  • the channels 3, 4 are open either to the inlet side 1 'or to the outlet side 1 "of the catalyst module 1, so that the flue gas stream S is forcibly passed through the catalyst elements 2.
  • the channels 3, 4 can optionally be a constant one, as in the example shown
  • the channels 3, 4 can also be optimized in terms of flow conditions by means of flow-improving internals.
  • the inlet side 1 'of the catalyst module 1 and the entry into the catalyst elements for example, statically relevant struts, load attachment points, walk-on gratings or the like, which can lead to a corresponding distance between the inlet side 1 'of the catalyst module 1 and the entry into the catalyst elements 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Biomedical Technology (AREA)
  • Combustion & Propulsion (AREA)
  • Toxicology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Catalysts (AREA)

Abstract

The invention relates to a catalyst module (1) with internal fittings made of catalyst elements (2), wherein the surface area of the individual catalyst elements, against which flow is directed, is greater than the flow entry surface area of the catalyst module, wherein the surface of the module side facing the main direction of flow (S) is defined as the module entry surface, and wherein the catalyst elements in the catalyst module are positioned such that flue gas flows through said elements in a direction differing from the entry side and/or the exit side direction of flow.

Description

KATALYSATORMODUL MIT KATALYSATORELEMENTEN  CATALYST MODULE WITH CATALYST ELEMENTS
Die Erfindung betrifft ein Katalysatormodul mit Einbauten aus Katalysatorelementen. The invention relates to a catalyst module with internals of catalyst elements.
Stand der Technik State of the art
SCR-Katalysatoren stellen den Stand der Technik zur Ent- stickung von Rauchgasen dar. Damit wird ein wesentlicher Bei- trag zur Verminderung des bodennahen Ozons, des sauren Regens und des Treibhauseffektes geleistet. Diese Technologie wird in thermischen Kraftwerken und Müllverbrennungsanlagen genauso eingesetzt wie in Verbrennungskraftmaschinen und vielen industriellen Bereichen. SCR catalysts represent the state of the art for the de-icing of flue gases. This makes a significant contribution to the reduction of ground-level ozone, acid rain and the greenhouse effect. This technology is used in thermal power plants and waste incineration plants as well as in internal combustion engines and many industrial sectors.
Neben der Reduktion von Stick ( stoff) oxiden werden Katalysatoren beispielsweise auch zum Abbau von Dioxinen und Furanen eingesetzt, was sich im besonderen bei Müllverbrennungsanlagen als technischer Standard durchgesetzt hat.  In addition to the reduction of stick (oxide) oxides, catalysts are also used, for example, for the degradation of dioxins and furans, which has become particularly prevalent in waste incineration plants as a technical standard.
Katalysatorelemente werden beispielsweise in Form von ho- mögen extrudierten Wabenkörpern oder in Form von Trägerwerkstoffen, deren Oberfläche mit einer katalytischen Schicht versehen wird und die Plattenkatalysatoren genannt werden, angeboten. Weitere Ausführungsvarianten sind beispielsweise Katalysatoren in Pelletform, Zeolithkatalysatoren, bei denen die aktive Schicht auf einen keramischen Träger mittels Washcoat-Verfahren aufgebracht wird, sowie als wellenförmige Platten ausgeführte Katalysatoren .  Catalyst elements are offered, for example, in the form of hollow extruded honeycomb bodies or in the form of carrier materials whose surface is provided with a catalytic layer and which are called plate catalysts. Further variants are, for example, catalysts in pellet form, zeolite catalysts in which the active layer is applied to a ceramic support by means of a washcoat process, and catalysts designed as wave-shaped plates.
Zum Einbau in SCR-Reaktoren werden die einzelnen Katalysatorelemente in parallelepipedische Katalysatormodule (bei- spielsweise Stahlmodule) gepackt, welche im Verbund als Katalysatorlage bezeichnet werden. Zwischen den einzelnen Katalysatormodulen sowie zwischen den Katalysatormodulen und der Wand des die Module aufnehmenden Reaktorgehäuses werden Dichtungen vorgesehen, um den Rauchgasstrom zwingend durch die Katalysa¬ torelemente zu führen. For installation in SCR reactors, the individual catalyst elements are packed in parallelepipedic catalyst modules (for example steel modules), which are referred to as catalyst layer in the composite. Seals are formed between the individual catalyst modules and between the catalyst modules and the wall of the reactor housing accommodating the modules provided to forcibly guide the flue gas stream through the cata ¬ torelemente.
Einen wesentlichen Leistungsparameter stellt der durch den Einbau der Katalysatorelemente in das Katalysatormodul einher- gehende Druckverlust dar. Es wird angestrebt, diesen uner¬ wünschten Druckverlust so gering wie möglich zu halten. Der Druckverlust wird unter anderem durch die Wahl der Geometrie der Katalysatorelemente beeinflußt. Der Geometriewahl sind allerdings fertigungsbedingte sowie prozeßbedingte Grenzen ge- setzt. Die Größe des SCR-Reaktors beeinflußt ebenfalls direkt den Druckverlust. Dem Gestaltungspielraum sind somit Grenzen gesetzt: einerseits durch bauseitige Einschränkungen, im besonderen bei später nachgerüsteten SCR-Reaktoren, andererseits durch ökonomische Überlegungen. A key performance parameter represents the einher- continuous pressure loss by the installation of the catalyst elements in the catalyst module. The aim is to keep this unwanted ¬ desired pressure drop as low as possible. The pressure loss is influenced inter alia by the choice of the geometry of the catalyst elements. The choice of geometry, however, is subject to production-related and process-related limits. The size of the SCR reactor also directly affects the pressure loss. There are limits to the freedom of design: on the one hand by on-site restrictions, in particular with later retrofitted SCR reactors, and on the other hand by economic considerations.
Aufgabe der Erfindung Object of the invention
Die Erfindungsaufgabe liegt in der Bereitstellung von Katalysatormodulen mit größtmöglicher, katalytisch aktiver Ober- fläche bei gegebenem beschränktem Reaktorquerschnitt unter gleichzeitiger Minimierung des durch die Katalysatorelemente verursachten Druckverlustes. Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Anströmfläche der einzelnen Katalysatorelemente größer als die Strömungseintrittsfläche des Kataly- satormoduls ist, wobei als Moduleintrittsfläche die der Hauptströmungsrichtung zugewandte Fläche der Modulseite definiert ist, und wobei die Katalysatorelemente im Katalysatormodul derart positioniert sind, daß sie von der Richtung der eintritts- seitigen und/oder der austrittsseitigen Strömungsrichtung ab- weichend vom Rauchgas durchströmt werden. The object of the invention is to provide catalyst modules with the greatest possible catalytically active surface area for a given limited reactor cross-section while at the same time minimizing the pressure loss caused by the catalyst elements. This object is achieved in that the inflow surface of the individual catalyst elements is greater than the flow inlet surface of the Kataly- satormoduls, wherein the module inlet surface of the main flow direction facing surface of the module side is defined, and wherein the catalyst elements are positioned in the catalyst module such that they are of the Direction of the inlet-side and / or the outlet-side flow direction are flowing through the flue gas deviating.
Die Bereitstellung der erforderlichen Katalysatoroberfläche und des damit verbundenen Katalysatorvolumens wird somit durch die erfindungsgemäße Anordnung der Katalysatorelemente innerhalb der Katalysatormodule erzielt, was eine Vergrößerung der Tiefe der Katalysatormodule mit sich bringt. Der Querschnitt des SCR-Reaktors bleibt dabei unverändert. The provision of the required catalyst surface and the associated catalyst volume is thus by the inventive arrangement of the catalyst elements achieved within the catalyst modules, which entails an increase in the depth of the catalyst modules. The cross section of the SCR reactor remains unchanged.
Gemäß einer alternativen Ausführungsform sind vorzugsweise auch Katalysatorelemente vorgesehen, welche parallel zur Aus¬ richtung der eintrittsseitigen und/oder der austrittsseitigen Strömungsrichtung vom Rauchgas durchströmt werden. According to an alternative embodiment, the catalyst elements are preferably provided, which are flowed through in parallel to the off ¬ direction of the incident side and / or the exit-side flow direction of the flue gas.
Vorzugsweise ist an der Eintrittsseite des Katalysatormoduls mindestens ein Rauchgaskanal angeordnet, der das Rauch- gas in das Katalysatormodul führt, wobei als Eintrittsseite des Katalysatormoduls die der Hauptströmungsrichtung zugewandte Modulseite definiert ist.  Preferably, at least one flue gas channel is arranged on the inlet side of the catalyst module, which leads the flue gas into the catalyst module, the module side facing the main flow direction being defined as the inlet side of the catalyst module.
Nach einem weiteren Erfindungsmerkmal ist an der Austrittsseite des Katalysatormoduls mindestens ein Rauchgaskanal angeordnet, der das Rauchgas aus dem Katalysatormodul führt, wobei als Austrittsseite des Katalysatormoduls die der Hauptströmungsrichtung abgewandte Modulseite definiert ist.  According to a further feature of the invention, at least one flue gas duct is arranged on the outlet side of the catalyst module, which leads the flue gas out of the catalyst module, wherein the module side remote from the main flow direction is defined as the outlet side of the catalyst module.
Die Erfindung wird nachfolgend unter Bezugnahme auf die Zeichnung näher erläutert, die einen Schnitt durch ein Kataly- satormodul gemäß der Erfindung zeigt.  The invention will be explained in more detail below with reference to the drawing, which shows a section through a catalytic converter module according to the invention.
Der an sich konventionelle Aufbau eines Katalysatormoduls 1 ist dadurch bestimmt, daß der Rauchgasstrom S innerhalb des Katalysatormoduls 1 ohne Umlenkung der Strömungsrichtung von der Eintrittsseite 1' des Katalysatormoduls 1 durch die Kanäle 3, 4 der Katalysatorelemente 2 zur Austrittsseite 1" des Katalysatormoduls 1 strömt.  The per se conventional structure of a catalyst module 1 is determined by the fact that the flue gas stream S flows within the catalyst module 1 without deflecting the flow direction from the inlet side 1 'of the catalyst module 1 through the channels 3, 4 of the catalyst elements 2 to the outlet side 1 "of the catalyst module 1.
Bei dem in der Zeichnung dargestellten erfindungsgemäßen Aufbau des Katalysatormoduls 1, der im Wesentlichen als geschlossener parallelepipedischer Körper mit rechteckigen Sei- tenflächen ausgebildet ist, werden die Katalysatorelemente 2 abweichend von der bisherigen Praxis bezüglich der Eintrittsseite 1' und/oder der Austrittsseite 1" bzw. der Strömungsrichtung im Katalysatormodul 1 neu positioniert. Die Durchströmung der Katalysatorelemente 2 erfolgt somit in einer bezüglich der eintrittsseitigen und/oder der austrittsseitigen Strömungsrichtung abweichenden Richtung, beispielsweise um 90° versetzt. Durch diese besondere Anordnung der Katalysatorelemente 2 innerhalb des Katalysatormoduls 1 ergibt sich die Möglichkeit, den bestehenden Querschnitt der Reaktoranlage in der Tiefe zu nützen . Dadurch erreicht man eine nahezu beliebige Skalierbarkeit . In the structure according to the invention of the catalyst module 1 shown in the drawing, which is designed essentially as a closed parallelepipedic body with rectangular side surfaces, the catalyst elements 2 deviating from the previous practice with respect to the inlet side 1 'and / or the outlet side 1 "or the flow direction is repositioned in the catalyst module 1. The flow through the catalyst elements 2 thus takes place in a respect to the the inlet-side and / or the outlet-side flow direction deviating direction, for example offset by 90 °. By this particular arrangement of the catalyst elements 2 within the catalyst module 1, it is possible to use the existing cross-section of the reactor system in depth. This achieves almost any scalability.
Das Rauchgas wird von der Eintrittsseite 1' des Katalysatormoduls 1 über mehrere Öffnungen und mehrere Kanäle 3 zu den Katalysatorelementen 2 geleitet. Die Katalysatorelemente 2 sind so angeordnet, daß sie gegenüber der HauptStrömungsrichtung S des Rauchgases an der Moduleintrittsseite 1' um 90° versetzt ausgerichtet sind. An der Austrittsseite jedes Katalysatorelementes 2 mündet das Rauchgas wieder in einen Kanal 4, über wel- chen das Rauchgas zur Austrittsseite 1" des Katalysatormoduls 1 geleitet wird.  The flue gas is passed from the inlet side 1 'of the catalyst module 1 via a plurality of openings and a plurality of channels 3 to the catalyst elements 2. The catalyst elements 2 are arranged so that they are aligned with respect to the main flow direction S of the flue gas at the module inlet side 1 'offset by 90 °. On the exit side of each catalyst element 2, the flue gas opens again into a channel 4, via which the flue gas is led to the outlet side 1 "of the catalyst module 1.
Die Kanäle 3, 4 sind entweder zur Eintrittsseite 1' oder zur Äustrittsseite 1" des Katalysatormoduls 1 geöffnet, so daß der Rauchgasstrom S zwingend durch die Katalysatorelemente 2 geleitet wird. Die Kanäle 3, 4 können wahlweise wie beim gezeigten Beispiel einen gleichbleibenden, einen sich verringernden oder einen sich erweiternden Querschnittsverlauf aufweisen. Die Kanäle 3, 4 können auch durch strömungverbessernde Einbauten hinsichtlich der Strömungsverhältnisse optimiert gestaltet werden.  The channels 3, 4 are open either to the inlet side 1 'or to the outlet side 1 "of the catalyst module 1, so that the flue gas stream S is forcibly passed through the catalyst elements 2. The channels 3, 4 can optionally be a constant one, as in the example shown The channels 3, 4 can also be optimized in terms of flow conditions by means of flow-improving internals.
Im Unterschied dazu erfolgt bei dem konventionellen Aufbau der Katalysatormodule 1 die Zufuhr des Rauchgasstroms S in die Katalysatorelemente 2 direkt an der Eintrittsseite 1' des Katalysatormoduls 1, weil die Katalysatorelemente 2 üblicherweise direkt an der Eintrittsseite 1' der Katalysatormodule 1 angeordnet sind. In manchen Ausführungsvarianten sind zwischen der Eintrittsseite 1' des Katalysatormoduls 1 und dem Eintritt in die Katalysatorelemente 2 beispielsweise statisch relevante Verstrebungen, Lastanschlagspunkte, begehbare Gitterroste oder dergleichen mehr angebracht, was zu einem dementsprechenden Abstand zwischen der Eintrittsseite 1' des Katalysatormoduls 1 und dem Eintritt in die Katalysatorelemente 2 führen kann. In contrast, in the conventional design of the catalyst modules 1, the supply of the flue gas stream S in the catalyst elements 2 directly to the inlet side 1 'of the catalyst module 1, because the catalyst elements 2 are usually arranged directly on the inlet side 1' of the catalyst modules 1. In some embodiments, between the inlet side 1 'of the catalyst module 1 and the entry into the catalyst elements 2, for example, statically relevant struts, load attachment points, walk-on gratings or the like, which can lead to a corresponding distance between the inlet side 1 'of the catalyst module 1 and the entry into the catalyst elements 2.
Der vorstehend beschriebene Erfindungsgegenstand kann bei- spielsweise eingesetzt werden zur:  The subject matter described above can be used, for example, for:
• Verringerung des katalysatorbedingten Druckverlustes bei gleichbleibendem Reaktorguerschnitt .  • Reduction of the catalyst-induced pressure loss with constant reactor cut.
* Verringerung des katalysatorbedingten Druckverlustes bei gleichzeitig verkleinertem Reaktorquerschnitt.  * Reduction of the catalyst-related pressure loss with simultaneously reduced reactor cross-section.
· Beibehaltung des katalysatorbedingten Druckverlustes bei verkleinertem Reaktorquerschnitt.  · Maintenance of the catalyst-induced pressure loss with reduced reactor cross-section.
Es versteht sich, daß das vorstehend beschriebene Ausführungsbeispiel im Rahmen des Erfindungsgedankens verschiedentlich abgewandelt werden kann, insbesondere was die Lage der Ka- talysatorelemente im Katalysatormodul betrifft.  It is understood that the embodiment described above within the scope of the inventive concept can be modified variously, in particular as regards the position of the catalyst elements in the catalytic converter module.

Claims

Patentansprüche : Claims:
1. Katalysatormodul mit Einbauten aus Katalysatorelementen, dadurch gekennzeichnet, daß die Anströmfläche der einzel- nen Katalysatorelemente (2) größer als die Strömungseintrittsfläche des Katalysatormoduls (1) ist, wobei als Moduleintrittsfläche die der Hauptströmungsrichtung (S) zugewandte Fläche der Modulseite definiert ist, und wobei die Katalysatorelemente (2) im Katalysatormodul (1) derart positioniert sind, daß sie von der Richtung der eintrittsseitigen und/oder der austrittsseiti- gen Strömungsrichtung abweichend vom Rauchgas durchströmt werden . 1. Catalyst module with internals of catalyst elements, characterized in that the inflow surface of the individual catalyst elements (2) is greater than the flow inlet surface of the catalyst module (1), wherein the module inlet surface of the main flow direction (S) facing surface of the module side is defined, and wherein the catalyst elements (2) in the catalyst module (1) are positioned in such a way that they are flowed through by the direction of the inlet-side and / or the outlet-side flow direction deviating from the flue gas.
2. Katalysatormodul, dadurch gekennzeichnet, daß vorzugsweise auch Katalysatorelemente (2) vorgesehen sind, welche parallel zur Ausrichtung der eintrittsseitigen und/oder der austrittsseitigen Strömungsrichtung vom Rauchgas durchströmt werden .  2. catalyst module, characterized in that preferably also catalyst elements (2) are provided, which are flowed through parallel to the orientation of the inlet side and / or the outlet-side flow direction of the flue gas.
3. Katalysatormodul nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß an der Eintrittsseite (Ι') des Katalysatormo- duls (1) mindestens ein Rauchgaskanal (3) angeordnet ist, der das Rauchgas in das Katalysatormodul (1) führt, wobei als Eintrittsseite (l1) des Katalysatormoduls (1) die der Hauptströmungsrichtung (S) zugewandte Modulseite definiert ist. 3. Catalyst module according to claim 1 or 2, characterized in that on the inlet side (Ι ') of the catalyst module (1) at least one flue gas duct (3) is arranged, which leads the flue gas in the catalyst module (1), wherein as the inlet side (l 1 ) of the catalyst module (1) the main flow direction (S) facing module side is defined.
4. Katalysatormodul nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß an der Austrittsseite (1") des Katalysatormoduls (1) mindestens ein Rauchgaskanal (4) angeordnet ist, der das Rauchgas aus dem Katalysatormodul (1) führt, wobei als Austrittsseite (1") des Katalysatormoduls (1) die der Hauptströmungsrichtung (S) abgewandte Modulseite definiert ist.  4. Catalyst module according to one of claims 1 to 3, characterized in that on the outlet side (1 ") of the catalyst module (1) at least one flue gas duct (4) is arranged, which leads the flue gas from the catalyst module (1), wherein as outlet side (1 ") of the catalyst module (1) the main flow direction (S) facing away from the module side is defined.
EP14723668.1A 2013-04-15 2014-04-14 Catalyst module with catalyst elements Withdrawn EP2986358A1 (en)

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CN105257375A (en) * 2015-10-08 2016-01-20 南京依柯卡特汽车催化器有限公司 Wall-flow type catalytic converter based on multiple layers
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