EP3010636A1 - Catalytic converter reactor - Google Patents

Catalytic converter reactor

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Publication number
EP3010636A1
EP3010636A1 EP14742451.9A EP14742451A EP3010636A1 EP 3010636 A1 EP3010636 A1 EP 3010636A1 EP 14742451 A EP14742451 A EP 14742451A EP 3010636 A1 EP3010636 A1 EP 3010636A1
Authority
EP
European Patent Office
Prior art keywords
catalyst
catalytic converter
reactor
modules
flow direction
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Withdrawn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
EP14742451.9A
Other languages
German (de)
French (fr)
Inventor
Kurt Orehovsky
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
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Application filed by Ibiden Porzellanfabrik Frauenthal GmbH filed Critical Ibiden Porzellanfabrik Frauenthal GmbH
Publication of EP3010636A1 publication Critical patent/EP3010636A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/24—Stationary reactors without moving elements inside
    • B01J19/248—Reactors comprising multiple separated flow channels
    • B01J19/2485—Monolithic reactors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/011—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more purifying devices arranged in parallel
    • F01N13/017—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more purifying devices arranged in parallel the purifying devices are arranged in a single housing
    • 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]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • 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
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • 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
    • F01N2260/06—Exhaust treating devices having provisions not otherwise provided for for improving exhaust evacuation or circulation, or reducing 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
    • 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
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2215/00—Preventing emissions
    • F23J2215/10—Nitrogen; Compounds thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2219/00—Treatment devices
    • F23J2219/10—Catalytic reduction devices
    • 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 reactor with internals of catalyst modules.
  • 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 catalyst modules (for example steel modules), which are referred to collectively as catalyst layer. Between the individual catalyst modules and between the catalyst modules and the wall of the modules receiving Reactor housing seals are provided to force the flue gas flow through the catalyst elements.
  • catalyst modules for example steel modules
  • a significant performance parameter is the pressure loss associated with incorporation of the catalyst modules into the reactor. It is desirable to minimize this undesirable pressure drop.
  • the pressure loss is influenced inter alia by the choice of the geometry of the catalyst elements. The choice of geometry, however, set 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 modules.
  • This object is achieved in a Kataysa- torreaktor the introductory type according to the invention that the sum of the Anströmein trecs vom the individual catalyst modules per catalyst layer is greater than the flow inlet surface of the catalyst reactor, wherein the module inlet surface of the main flow direction facing surface of the catalyst module side is defined, and wherein the Catalyst modules are positioned in the catalyst reactor such that the catalyst elements installed in the catalyst modules are flowed through by the inlet side and / or the outlet-side flow direction deviating from the flue gas.
  • the provision of the required catalyst surface and the associated catalyst volume is thus achieved by the inventive arrangement of the catalyst modules in ⁇ within the catalyst reactor, which brings an increase in the depth of the catalyst module assembly with it.
  • the cross section of the SCR reactor remains unchanged.
  • catalyst modules are additionally provided, which flow through the flue gas parallel to the orientation of the inlet-side and / or the outlet-side flow direction. These may be located, for example, in the same catalyst layer and / or in a preceding or downstream catalyst layer.
  • Fig. 1 is a schematic perspective view of a catalyst reactor according to the invention
  • Fig. 2 is a schematic plan view
  • Fig. 3 is a front view
  • Fig. 4 is a schematic section along the line IV-IV in Fig. 3 show.
  • the per se conventional structure of a parallelepipedi see catalytic reactor 1 is determined by the fact that the flue gas flow S within the catalyst module 2 without caused by the catalyst deflection of the (main) flow direction of the inlet side 2 'of a catalyst module 2 through channels 4 of the catalyst elements to the exit side 2 "of the catalyst module 2 flows.
  • the parallelepipedic catalyst modules 2 are repositioned differently from the previous practice with respect to the inlet side 2 'and / or the outlet side 2 "or the flow direction in the catalyst reactor 1.
  • the flow through the catalyst elements 3 takes place in a direction deviating with respect to the inlet-side and / or the outlet-side flow direction, for example, inclined at 60 °. Due to this particular arrangement of the catalyst modules 2 and, associated therewith, the catalyst elements 3 within the catalyst reactor 1, it is possible to utilize the existing cross section of the reactor plant at depth. This achieves a significant enlargement of the catalyst inlet surface within a catalyst layer with a constant cross section of the catalyst reactor 1.
  • the flue gas is gelei ⁇ tet from the inlet side 2 'of the catalyst module 2 through the channels 4 of the catalyst elements 3.
  • the catalyst modules 2 are arranged so that the therein catalyst elements 3 and thus their channels 4 are aligned to the main flow direction S of the flue gas in front of the module inlet side 2 ', for example 60 ° inclined and accordingly flows through.
  • the flue gas flows back into the entire flue gas stream S, which runs aligned parallel to the reactor wall.

Landscapes

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

Abstract

A catalytic converter reactor (1) having in-built catalytic converter modules (2), wherein the total flow impingement surface area provided by the catalytic converter elements (3) fitted in the catalytic converter modules is larger than the flow impingement surface area of the catalytic converter reactor, the module impingement surface area being defined by the catalytic converter module surfaces facing the main flow direction, and the catalytic converter modules being positioned so that the waste gas flows through the catalytic converter elements contained therein in a direction different from the flow direction on the intake and exit sides.

Description

Katalysatorreaktor  catalyst reactor
Die Erfindung betrifft einen Katalysatorreaktor mit Einbauten aus Katalysatormodulen. The invention relates to a catalyst reactor with internals of catalyst modules.
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 Katalysatormodule (beispielsweise 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 Katalysatorelemente zu führen. For installation in SCR reactors, the individual catalyst elements are packed in catalyst modules (for example steel modules), which are referred to collectively as catalyst layer. Between the individual catalyst modules and between the catalyst modules and the wall of the modules receiving Reactor housing seals are provided to force the flue gas flow through the catalyst elements.
Einen wesentlichen Leistungsparameter stellt der durch den Einbau der Katalysatormodule in den Reaktor einhergehende Druckverlust dar. Es wird angestrebt, diesen unerwünschten 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 gesetzt. 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 significant performance parameter is the pressure loss associated with incorporation of the catalyst modules into the reactor. It is desirable to minimize this undesirable pressure drop. The pressure loss is influenced inter alia by the choice of the geometry of the catalyst elements. The choice of geometry, however, set 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 Oberfläche bei gegebenem beschränktem Reaktorquerschnitt unter gleichzeitiger Minimierung des durch die Katalysatormodule verursachten Druckverlustes. Diese Aufgabe wird bei einem Kataysa- torreaktor der einleitend angegebenen Art erfindungsgemäß dadurch gelöst, daß die Summe der Anströmeintrittsflächen der einzelnen Katalysatormodule je Katalysatorlage größer als die Strömungseintrittsfläche des Katalysatorreaktors ist, wobei als Moduleintrittsfläche die der Hauptströmungsrichtung zugewandte Fläche der Katalysatormodulseite definiert ist, und wobei die Katalysatormodule im Katalysatorreaktor derart positioniert sind, daß die in den Katalysatormodulen verbauten Katalysatorelemente von der eintrittsseitigen und/oder der austritts- seitigen Strömungsrichtung abweichend vom Rauchgas durchströmt sind. Die Bereitstellung der erforderlichen Katalysatoroberfläche und des damit verbundenen Katalysatorvolumens wird somit durch die erfindungsgemäße Anordnung der Katalysatormodule in¬ nerhalb des Katalysatorreaktors erzielt, was eine Vergrößerung der Bautiefe des Katalysatormodulverbundes mit sich bringt. Der Querschnitt des SCR-Reaktors bleibt dabei unverändert. 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 modules. This object is achieved in a Kataysa- torreaktor the introductory type according to the invention that the sum of the Anströmeintrittsflächen the individual catalyst modules per catalyst layer is greater than the flow inlet surface of the catalyst reactor, wherein the module inlet surface of the main flow direction facing surface of the catalyst module side is defined, and wherein the Catalyst modules are positioned in the catalyst reactor such that the catalyst elements installed in the catalyst modules are flowed through by the inlet side and / or the outlet-side flow direction deviating from the flue gas. The provision of the required catalyst surface and the associated catalyst volume is thus achieved by the inventive arrangement of the catalyst modules in ¬ within the catalyst reactor, which brings an increase in the depth of the catalyst module assembly with it. The cross section of the SCR reactor remains unchanged.
Gemäß einer alternativen Ausführungsform sind ergänzend auch Katalysatormodule vorgesehen, welche parallel zur Ausrichtung der eintrittsseitigen und/oder der austrittsseitigen Strö- mungsrichtung vom Rauchgas durchströmt sind. Diese können sich beispielsweise in der selben Katalysatorlage und/oder in einer vor- bzw. nachgelagerten Katalysatorlage befinden.  According to an alternative embodiment, catalyst modules are additionally provided, which flow through the flue gas parallel to the orientation of the inlet-side and / or the outlet-side flow direction. These may be located, for example, in the same catalyst layer and / or in a preceding or downstream catalyst layer.
Die Erfindung wird nachfolgend unter Bezugnahme auf die Zeichnungen näher erläutert, wobei Fig. 1 eine schematische Perspektivansicht eines Katalysatorreaktors gemäß der Erfindung, Fig. 2 eine schematische Draufsicht, Fig. 3 eine Vorderansicht und Fig. 4 einen schematischen Schnitt nach der Linie IV-IV in Fig. 3 zeigen.  The invention is explained in more detail below with reference to the drawings, in which Fig. 1 is a schematic perspective view of a catalyst reactor according to the invention, Fig. 2 is a schematic plan view, Fig. 3 is a front view and Fig. 4 is a schematic section along the line IV-IV in Fig. 3 show.
Der an sich konventionelle Aufbau eines parallelepipedi- sehen Katalysatorreaktors 1 ist dadurch bestimmt, daß der Rauchgasstrom S innerhalb des Katalysatormoduls 2 ohne eine durch den Katalysator hervorgerufene Umlenkung der (Haupt-) Strömungsrichtung von der Eintrittsseite 2' eines Katalysatormoduls 2 durch Kanäle 4 der Katalysatorelemente 3 zur Aus- trittsseite 2" des Katalysatormoduls 2 strömt.  The per se conventional structure of a parallelepipedi see catalytic reactor 1 is determined by the fact that the flue gas flow S within the catalyst module 2 without caused by the catalyst deflection of the (main) flow direction of the inlet side 2 'of a catalyst module 2 through channels 4 of the catalyst elements to the exit side 2 "of the catalyst module 2 flows.
Bei dem in der Zeichnung dargestellten erfindungsgemäßen Aufbau des Katalysatorreaktors 1 sind die parallelepipedisch ausgebildeten Katalysatormodule 2 abweichend von der bisherigen Praxis bezüglich der Eintrittsseite 2' und/oder der Austritts- seite 2" bzw. der Strömungsrichtung im Katalysatorreaktor 1 neu positioniert. Die Durchströmung der Katalysatorelemente 3 erfolgt somit in einer bezüglich der eintrittsseitigen und/oder der austrittsseitigen Strömungsrichtung abweichenden Richtung, beispielsweise unter 60° geneigt. Durch diese besondere Anordnung der Katalysatormodule 2 und damit verbunden der Katalysatorelemente 3 innerhalb des Katalysatorreaktors 1 ergibt sich die Möglichkeit, den bestehenden Querschnitt der Reaktoranlage in der Tiefe zu nützen. Dadurch erreicht man eine signifikante Vergrößerung der Katalysatoreintrittsfläche innerhalb einer Katalysatorlage bei gleichbleibendem Querschnitt des Katalysatorreaktors 1. In the construction according to the invention of the catalyst reactor 1 shown in the drawing, the parallelepipedic catalyst modules 2 are repositioned differently from the previous practice with respect to the inlet side 2 'and / or the outlet side 2 "or the flow direction in the catalyst reactor 1. The flow through the catalyst elements 3 takes place in a direction deviating with respect to the inlet-side and / or the outlet-side flow direction, for example, inclined at 60 °. Due to this particular arrangement of the catalyst modules 2 and, associated therewith, the catalyst elements 3 within the catalyst reactor 1, it is possible to utilize the existing cross section of the reactor plant at depth. This achieves a significant enlargement of the catalyst inlet surface within a catalyst layer with a constant cross section of the catalyst reactor 1.
Das Rauchgas wird von der Eintrittsseite 2' des Katalysa- tormoduls 2 durch die Kanäle 4 der Katalysatorelemente 3 gelei¬ tet. Die Katalysatormodule 2 sind so angeordnet, daß die darin befindlichen Katalysatorelemente 3 und damit deren Kanäle 4 zur Hauptströmungsrichtung S des Rauchgases vor der Moduleintrittsseite 2' um beispielsweise 60° geneigt ausgerichtet und dement- sprechend durchströmt sind. An der Austrittsseite 2" jedes Katalysatormoduls 2 mündet das Rauchgas wieder in den gesamten Rauchgasstrom S, der parallel zur Reaktorwand ausgerichtet verläuft. The flue gas is gelei ¬ tet from the inlet side 2 'of the catalyst module 2 through the channels 4 of the catalyst elements 3. The catalyst modules 2 are arranged so that the therein catalyst elements 3 and thus their channels 4 are aligned to the main flow direction S of the flue gas in front of the module inlet side 2 ', for example 60 ° inclined and accordingly flows through. At the exit side 2 "of each catalyst module 2, the flue gas flows back into the entire flue gas stream S, which runs aligned parallel to the reactor wall.
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 Reaktorquerschnitt.  • Reduction of the catalyst-related pressure loss with constant reactor cross-section.
• 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 oder reduzierter Anzahl an Katalysatorlagen.  · Maintaining the catalyst-induced pressure loss with reduced reactor cross-section or reduced number of catalyst layers.
Es versteht sich, daß das vorstehend beschriebene Ausführungsbeispiel im Rahmen des Erfindungsgedankens verschiedent- lieh abgewandelt werden kann, insbesondere was die Lage der Katalysatormodule im Katalysatorreaktor bzw. die Lage der Katalysatorelemente im Katalysatormodul betrifft.  It is understood that the embodiment described above within the scope of the inventive concept can be varied lent different, in particular as regards the position of the catalyst modules in the catalyst reactor or the position of the catalyst elements in the catalyst module.

Claims

Patentansprüche : Claims:
1. Katalysatorreaktor mit Einbauten aus Katalysatormodulen, dadurch gekennzeichnet, daß die Summe der Anströmeintrittsflachen der in den Katalysatormodulen (2) eingebauten Katalysatorelemente (3) größer als die Strömungseintrittsfläche des Katalysatorreaktors (1) ist, wobei als Moduleintrittsfläche die der HauptStrömungsrichtung (S) zugewandten Flächen der Ka- talaysatormodulseiten definiert sind, und wobei die Katalysatormodule (2) derart positioniert sind, daß die darin befindlichen Katalysatorelemente (3) von der Richtung der eintrittssei- tigen und/oder der austrittsseitigen Strömungsrichtung abweichend vom Rauchgas durchströmt sind. 1. Catalyst reactor with internals of catalyst modules, characterized in that the sum of the Anströmeintrittsflachen in the catalyst modules (2) installed catalyst elements (3) is greater than the flow inlet surface of the catalyst reactor (1), wherein the module inlet surface of the main flow direction (S) facing surfaces the catalyst actuator module sides are defined, and wherein the catalyst modules (2) are positioned such that the catalyst elements (3) therein are flowed through by the direction of the inlet side and / or the outlet-side flow direction deviating from the flue gas.
2. Katalysatorreaktor (1) nach Anspruch 1, dadurch gekennzeichnet, daß auch Katalysatormodule (2) vorgesehen sind, deren Katalysatorelemente (3) parallel zur Ausrichtung der eintrittsseitigen und/oder der austrittsseitigen Strömungsrichtung vom Rauchgas durchströmt sind.  2. Catalyst reactor (1) according to claim 1, characterized in that catalyst modules (2) are provided, the catalyst elements (3) are flowed through parallel to the orientation of the inlet side and / or the outlet-side flow direction of the flue gas.
EP14742451.9A 2013-06-19 2014-06-20 Catalytic converter reactor Withdrawn EP3010636A1 (en)

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ATA494/2013A AT514512A1 (en) 2013-06-19 2013-06-19 catalyst reactor
PCT/AT2014/000129 WO2014201485A1 (en) 2013-06-19 2014-06-20 Catalytic converter reactor

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JP6389516B2 (en) 2018-09-12
US20160144317A1 (en) 2016-05-26
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CN105339081B (en) 2019-02-12

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