WO1999005401A1 - Systeme d'epuration des gaz d'echappement pour moteur diesel - Google Patents

Systeme d'epuration des gaz d'echappement pour moteur diesel Download PDF

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Publication number
WO1999005401A1
WO1999005401A1 PCT/DE1998/002039 DE9802039W WO9905401A1 WO 1999005401 A1 WO1999005401 A1 WO 1999005401A1 DE 9802039 W DE9802039 W DE 9802039W WO 9905401 A1 WO9905401 A1 WO 9905401A1
Authority
WO
WIPO (PCT)
Prior art keywords
protective grille
exhaust pipe
mixing device
exhaust gas
protective
Prior art date
Application number
PCT/DE1998/002039
Other languages
German (de)
English (en)
Inventor
Frank Witzel
Wieland Mathes
Steffen Schnapp
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO1999005401A1 publication Critical patent/WO1999005401A1/fr

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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
    • F01N3/18—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
    • 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
    • B01D53/90—Injecting reactants
    • 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
    • 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
    • F01N13/009—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 separate purifying devices arranged in series
    • 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
    • F01N13/009—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 separate purifying devices arranged in series
    • F01N13/0097—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 separate purifying devices arranged in series 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • 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 an ignition system for cleaning exhaust gas for a diesel engine, in which an injection device for a reducing agent, a mixing device and a catalyst device are arranged in an exhaust pipe.
  • the 7 ⁇ nlage can be used in particular for a marine diesel engine.
  • SiNOx exhaust gas purification system by Siemens AG, Berlin and Kunststoff, Germany (company brochure "SINOx nitrogen oxide reduction for stationary diesel engines", order number A96001-U91-A232).
  • the mode of operation of the SiNOx exhaust gas cleaning system is based on the SCR process (Selective Catalytic Reduction).
  • the nitrogen oxides of the exhaust gas are mixed with a reducing agent, such as ammonia or urea, in the exhaust pipe, passed into a reactor space and converted to the environmentally friendly substances hydrogen and nitrogen at the catalyst device.
  • a static mixer is used to mix the reducing agent with the exhaust gas.
  • Such a static mixer is known for example from EP 0 594 657. It can be used in particular in an exhaust gas purification system for the exhaust gas from power plants, but also from diesel engines. It has a number of deflection elements or wings, which serve to swirl the flowing exhaust gas.
  • the exhaust pipe can in particular between the turbocharger (compressor) of a diesel engine and between the exhaust gas supply system for nitrogen oxide cleaning. It has now been found in practice that parts can fall into the exhaust pipe during assembly work or service work on the system. This can be broken off parts from the catalyst device, but also wings from the mixing device. This can result in damage to the turbocharger and thus to a standstill of the diesel engine, especially with a vertically or diagonally laid pipeline for the exhaust gas - the exhaust gas is routed from bottom to top.
  • the exhaust gas cleaning systems described in the prior art and known here do not contain any protective devices against such falling parts.
  • the object of the present invention is accordingly to design a plant of the type mentioned at the outset in such a way that it ensures protection from parts, in particular from falling parts. If the exhaust pipe originates from a turbocharger of the diesel engine, this turbocharger in particular should also be protected.
  • a system of the type mentioned is characterized according to the invention by a fine-meshed protective grille in the exhaust pipe.
  • This screen or protective grille is preferably combined with the mixing device.
  • the protective grille and the mixing device which generally consist of metal, can be welded to one another so that they result in a relatively thin structural unit.
  • the above-mentioned static mixer is preferably used as the mixing device.
  • the protective grille should be installed on the upstream side of the mixer if possible. It then prevents not only broken chunks of the catalytic converter from falling, but also broken blades of the mixer in the direction of the turbocharger and the diesel engine which may be present.
  • the protective grille can be installed directly on or especially directly below the catalyst device. If a mixer is integrated in front of the injection device, it makes sense to attach the protective grille here.
  • the advantage of the invention is in particular that the turbocharger, if present, is also protected from particles present in the exhaust pipe.
  • the fine-meshed protective grille generally does not represent an additional pressure loss.
  • FIG 3 shows an exhaust gas cleaning system with a combination of mixing device and protective grille in the flow direction in front of a injection device.
  • a diesel engine (not shown), in particular a marine diesel engine, emits exhaust gas A into an exhaust pipe 4 via a compressor or turbocharger 2.
  • the exhaust pipe 4 is here in particular laid vertically or at a slight angle to the vertical.
  • the introduced exhaust gas A meets an injection nozzle direction 6 for a reducing agent r, for example for ammonia (NH 3 ) or in particular for urea in aqueous solution.
  • the mixture of exhaust gas A and reducing agent r then meets a mixing device 8, which is made in particular of a corrosion-resistant metal.
  • This mixing device is a so-called "static mixer” and can preferably be constructed according to EP 0 594 657. A good mixing or swirling takes place here.
  • the mixture of exhaust gas A and reducing agent r is then passed into an enlarged reaction space 10.
  • a sieve or protective grid 12 consists of a woven fabric of metal threads; its thickness d is, for example, between 2 mm and 4 mm.
  • a catalytic converter device 14 is installed, which in the present case consists of three modules of a DeNOx-CATalyser one above the other in levels I, II and III.
  • the exhaust gas A 'cleaned here is passed on via an outlet opening 18, for example discharged outdoors.
  • the protective grid 12 protects the mixing device 8, the injection device 6 and also the turbocharger 12 from falling off broken catalyst particles or lumps.
  • FIG. 2 largely corresponds to FIG. 1.
  • the metallic protective grille 12 is arranged between the injection device 6 and the mixing device 8, namely directly in front of its inflow surface.
  • the protective grid 12 and the mixing device 8 are integrated into one another and form a structural unit. In other words, they can be welded together.
  • the protective grille 12 protects both the injection device 6 and the turbocharger 2 against broken catalyst particles and against mixing blades that have broken away from the mixing device 6. Protection of the turbocharger 2 is thus also ensured here and thus prevents the diesel engine from being stopped.
  • an integration or combination of metallic protective grille 12 and metallic mixing device 8 is also provided. These two components 8, 12 can also be welded together again here.
  • the combination 8, 12 is here - as seen in the flow direction of the exhaust gas A - arranged in front of the injection device 6 for the reducing agent r, the protective grille 12 facing the turbocharger 2.
  • the protective grid 12 is therefore arranged on the side of the turbocharger 2. The arrangement is such that the injection device 6 lies in the turbulence area of the combination 8, 12.
  • the protective grille 12 and the mixing device 8 preferably form a unit that can be handled in a uniform manner.
  • an access opening (not shown), for example also a manhole, can expediently be arranged in the exhaust pipe 4 in the vicinity of the protective grille 12, this access opening in the vicinity of the protective grille 12 is useful in order to prevent falling particles , for example Quickly remove catalyst pieces, mixer pieces or nozzle parts.

Landscapes

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

Abstract

L'invention concerne un système d'épuration des gaz d'échappement, dans lequel sont disposés, dans un tuyau d'échappement (4) monté par exemple verticalement, un dispositif d'injection (6) d'un agent de réduction (r), un dispositif de mélange (8) et un dispositif à catalyseur (14). Afin d'empêcher que des particules détachées, notamment des blocs de catalyseur ou bien des pales du dispositif de mélange (8), ne tombent en direction du moteur diesel, une grille protectrice (12) à mailles fines est disposée dans le tuyau d'échappement (4). Cette grille est destinée à protéger le turbocompresseur (2) généralement monté en aval de ce moteur diesel. La grille protectrice (12) forme avec le dispositif de mélange (8) de préférence un ensemble manipulable unitairement.
PCT/DE1998/002039 1997-07-24 1998-07-20 Systeme d'epuration des gaz d'echappement pour moteur diesel WO1999005401A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19731926.2 1997-07-24
DE19731926A DE19731926C1 (de) 1997-07-24 1997-07-24 Abgasreinigungsanlage für einen Dieselmotor

Publications (1)

Publication Number Publication Date
WO1999005401A1 true WO1999005401A1 (fr) 1999-02-04

Family

ID=7836813

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1998/002039 WO1999005401A1 (fr) 1997-07-24 1998-07-20 Systeme d'epuration des gaz d'echappement pour moteur diesel

Country Status (2)

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DE (1) DE19731926C1 (fr)
WO (1) WO1999005401A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10334593B3 (de) * 2003-07-28 2005-04-21 Framatome Anp Gmbh Mischsystem
EP1982756A1 (fr) 2007-04-19 2008-10-22 Magneti Marelli Sistemi di Scarico S.p.a. Système d'échappement d'un moteur à combustion interne
EP2098697A1 (fr) 2008-02-12 2009-09-09 Magneti Marelli S.p.A. Système d'échappement d'un moteur à combustion interne
CN103821598A (zh) * 2014-03-21 2014-05-28 大连海事大学 船舶柴油机尾气选择性催化还原脱硝***

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19938854C5 (de) * 1999-08-17 2006-12-28 Emitec Gesellschaft Für Emissionstechnologie Mbh Vorrichtung zur Verringerung des Stickoxidanteils in einem Abgas einer Verbrennungskraftmaschine
US7572414B2 (en) * 2001-10-09 2009-08-11 Lummus Technology Inc. Modular system and method for the catalytic treatment of a gas stream
US6722123B2 (en) * 2001-10-17 2004-04-20 Fleetguard, Inc. Exhaust aftertreatment device, including chemical mixing and acoustic effects
DE10247987A1 (de) * 2002-10-15 2004-04-29 Robert Bosch Gmbh Anordnung und Verfahren zur Nachbehandlung des Abgases einer Brennkraftmaschine
DE102009021616A1 (de) * 2009-05-15 2010-11-18 Makon Engineering Gmbh Schiffabgasnachbehandlungsvorrichtung
US9255506B2 (en) * 2013-03-15 2016-02-09 Rail Gas Technologies Locomotive natural gas storage and transfer system
US9387438B2 (en) 2014-02-14 2016-07-12 Tenneco Automotive Operating Company Inc. Modular system for reduction of sulphur oxides in exhaust
CN104963750A (zh) * 2015-07-07 2015-10-07 江苏科技大学 一种用于大功率柴油机scr***的静态混合装置
DE102017107813A1 (de) * 2017-04-11 2018-10-11 Man Diesel & Turbo Se Abgasnachbehandlungssystem und Brennkraftmaschine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1094256A (en) * 1964-04-02 1967-12-06 Engelhard Ind Inc Improvements in or relating to the removal of oxides of nitrogen from gases containing them
US4821520A (en) * 1988-07-22 1989-04-18 Rumfield Michael A Turbocharger protector screen
WO1993000990A1 (fr) * 1991-07-12 1993-01-21 Siemens Aktiengesellschaft Melangeur statique
DE4336632A1 (de) * 1993-10-27 1995-01-26 Siemens Ag Einrichtung zur Kontaktierung eines Strömungsmediums mit einem eine Reaktion induzierenden Material

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4056934A (en) * 1975-09-27 1977-11-08 Toyota Jidosha Kogyo Kabushiki Kaisha After-burning preventive and flame-out apparatus
DE9308772U1 (de) * 1993-06-12 1993-09-30 Schneider, Arno, Dipl.-Ing., 53343 Wachtberg Vorrichtung zum Betrieb einer Verbrennungsanlage, insbesondere in Form einer Kraft-Wärme-Kopplung oder einer Blockheizkraftwerksanlage mit einer Abgasreinigungsanlage, insbesondere zur Verbrennung von schwerem Heizöl oder von Schweröl

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1094256A (en) * 1964-04-02 1967-12-06 Engelhard Ind Inc Improvements in or relating to the removal of oxides of nitrogen from gases containing them
US4821520A (en) * 1988-07-22 1989-04-18 Rumfield Michael A Turbocharger protector screen
WO1993000990A1 (fr) * 1991-07-12 1993-01-21 Siemens Aktiengesellschaft Melangeur statique
EP0594657A1 (fr) 1991-07-12 1994-05-04 Siemens Ag Melangeur statique.
DE4336632A1 (de) * 1993-10-27 1995-01-26 Siemens Ag Einrichtung zur Kontaktierung eines Strömungsmediums mit einem eine Reaktion induzierenden Material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SINOX STICKOXIDMINDERUNG FÜR STATIONCRE DIESELMOTOREN, no. A96001

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10334593B3 (de) * 2003-07-28 2005-04-21 Framatome Anp Gmbh Mischsystem
US7665884B2 (en) 2003-07-28 2010-02-23 Areva ANP GmbH Mixing system
EP1982756A1 (fr) 2007-04-19 2008-10-22 Magneti Marelli Sistemi di Scarico S.p.a. Système d'échappement d'un moteur à combustion interne
EP2098697A1 (fr) 2008-02-12 2009-09-09 Magneti Marelli S.p.A. Système d'échappement d'un moteur à combustion interne
CN103821598A (zh) * 2014-03-21 2014-05-28 大连海事大学 船舶柴油机尾气选择性催化还原脱硝***

Also Published As

Publication number Publication date
DE19731926C1 (de) 1999-01-21

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