WO1999010632A1 - Systeme de post-traitement de l'echappement d'un moteur diesel et procede correspondant - Google Patents

Systeme de post-traitement de l'echappement d'un moteur diesel et procede correspondant Download PDF

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Publication number
WO1999010632A1
WO1999010632A1 PCT/US1998/017583 US9817583W WO9910632A1 WO 1999010632 A1 WO1999010632 A1 WO 1999010632A1 US 9817583 W US9817583 W US 9817583W WO 9910632 A1 WO9910632 A1 WO 9910632A1
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WO
WIPO (PCT)
Prior art keywords
filter
exhaust
exhaust gas
gas
engine
Prior art date
Application number
PCT/US1998/017583
Other languages
English (en)
Inventor
Robert L. Goldsmith
Original Assignee
Ceramem Corporation
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 Ceramem Corporation filed Critical Ceramem Corporation
Publication of WO1999010632A1 publication Critical patent/WO1999010632A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2407—Filter candles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
    • B01D46/71—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with pressurised gas, e.g. pulsed air
    • 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
    • B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation 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
    • B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/0233—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles periodically cleaning filter by blowing a gas through the filter in a direction opposite to exhaust flow, e.g. exposing filter to engine air intake
    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/031—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters having means for by-passing filters, e.g. when clogged or during cold engine start
    • F01N3/032—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters having means for by-passing filters, e.g. when clogged or during cold engine start during filter regeneration only
    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • 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
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
    • F02M26/15—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system in relation to engine exhaust purifying apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
    • B01D2279/30—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for treatment of exhaust gases from IC Engines
    • 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
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • F02M26/27—Layout, e.g. schematics with air-cooled heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • F02M26/28—Layout, e.g. schematics with liquid-cooled heat exchangers
    • 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

  • Particulate filters for the removal of soot from diesel-exhaust sources are well-known and include ceramic monolith filters with passageways and having microporous membranes, to prevent the entrance of soot into the pores of the passageways of the filter and to permit periodic backflushing of the filter.
  • Ceramic monolith filters with passageways and having microporous membranes, to prevent the entrance of soot into the pores of the passageways of the filter and to permit periodic backflushing of the filter.
  • Such filters are described in U.S. Patent 5,114,581 , issued May 19, 1992, hereby incorporated by reference.
  • Catalytic monolith particulate filters are also well-known and also contain a catalyst impregnated or coated onto the passageways, to catalyze a reaction of the filtrate as it passes through the pores of the filter.
  • the catalyst may be selected to reduce, by catalytic reaction, the oxides of nitrogen in the gaseous filtrate.
  • catalytic filters are described, for example, in U.S. Patent 5,221 ,484, issued June 22, 1993, hereby incorporated by reference.
  • the invention relates to an exhaust gas, particularly a diesel gas, aftertreatment system and process to remove particulates, to oxidize gaseous components and to suppress oxides of nitrogen during the exhaust-gas combustion and during exhaust-gas recirculation (ERG).
  • the invention comprises a compact exhaust aftertreatment system which comprises a source of exhaust gas, such as a diesel engine; an exhaust-gas particulate filter means, preferably one or a plurality of ceramic-membrane-coated monolith filters, to remove soot and other particulates from the exhaust gas and to provide a substantially particulate-free exhaust gas for recycle to the engine; backpulsing means to backpulse periodically with a fluid, particularly compressed air, to remove collected soot and other particulates from said filter means; means, such as a bag filter, to collect the soot and particulate matter removed by the backpulsing of said filter; a source of backpulse fluid, preferably compressed air, for the backpulsing means; an oxidation catalyst means applied to the filter means
  • the invention includes a process for the aftertreatment of exhaust gas from a diesel engine, which process comprises: providing a diesel- exhaust gas for a diesel engine; filtering soot and particulate material from a diesel-exhaust gas employing a filter, such as a porous, ceramic- membrane, oxidation- catalyst monolith, to provide a substantially particulate-free exhaust gas; backpulsing the filter periodically to remove collected soot and particulate matter from said filter; collecting and discarding the removed soot and particulate material; oxidizing noncondensed hydrocarbons and carbon monoxide in the particulate-free exhaust gas employing an oxidation catalyst downstream of the filter, to provide filtered, clean exhaust gas; and recycling all or part of the filtered, clean exhaust gas to an inlet of the diesel engine, thereby providing a diesel-exhaust gas with suppressed NOx function and reduced carbon monoxide.
  • a filter such as a porous, ceramic- membrane, oxidation- catalyst monolith
  • the system and process provide an efficient, compact aftertreatment system with diesel-engine emission controls for paticulates
  • Figure 1 is a schematic illustration of the diesel-exhaust aftertreatment system of the invention
  • Figure 2 is a graphical representation of test data showing the NOx reduction by the system of Figure 1 as the percentage of NOx reduction in the exhaust versus the percentage of EGR.
  • Figure 1 illustrates a compact, efficient, diesel-exhaust aftertreatment system 10 for a diesel engine which emits exhaust gas.with soot and particulates and which includes a dirty-gas inlet line 32 into a filter chamber 20.
  • the chamber 20 includes a backpulse system which uses compressed air 14 from a storage tank, with a backpulse line 16 and backpulse valve 18 which extend to a blowpipe with nozzles 22 in the chamber 20.
  • the nozzles include Venturis which discharge into gas filters 24, typically a plurality of ceramic monolith filters 24 with a membrane coating and impregnated with an oxidation catalyst.
  • the system 10 includes an exhaust-gas bypass line 40 for use during the periodic backpulsing of the filters 24 with compressed air 14 through line 16 and valve 18.
  • Figure 2 represents in graphical form data obtained in tests with a 65 kW Caterpillar (CAT) diesel generator in the system 10 with ceramic monolith oxidation-catalyst filters 24, as described in U.S. Patent 5,221 ,484 and U.S. Patent 5,114,581 (with a membrane coating for backpulsing collected soot).
  • CAT Caterpillar
  • the system and process comprise three basic elements in combination: gas particulate filters ("filters”) to remove soot and other particulates from diesel-engine exhaust gas, the filters regenerable by backpulsing; and a precious-metal (or other composition) catalyst applied to the filters to oxidize noncondensed hydrocarbon vapors and carbon monoxide in the filtered gas as it passes through the filters; or a separate oxidation catalyst located downstream of the filters serving the same purpose; and exhaust-gas recirculation (EGR) of particle-free exhaust gas to the diesel-engine intake for suppression of NOx during combustion.
  • filters gas particulate filters
  • EGR exhaust-gas recirculation
  • the preferred filters are ceramic monolith filters, ceramic- membrane-coated, with the number of filters employed selected to match the gas-flow rate.
  • a normal operating filter-face velocity is 4-8 ft/min.
  • Backpulsing typically uses air from a compressed-air reservoir which passes through a backpulse valve, a backpulse blowpipe with backpulse nozzles, with the backpulse jet expanding into backpulse-assist ventu/is.
  • the backpulse air amount is typically ⁇ 0.1 % to 1% of the filtered exhaust- gas flow, depending on the diesel-exhaust particulate loading.
  • the regeneration blowdown gas can be directed to a separate cold- temperature, disposable bag filter to collect the blowdown particulates.
  • the bag is removed at the required frequency, and this permits simple disposal of the collected particulates.
  • the particulates can be collected in a separate chamber in which they are intermittently oxidized, as described in SAE (Society of Automotive Engineers) Technical Paper No. 930368 (included in SAE Publication "Diesel Exhaust Aftertreatment", SP-943).
  • the monolith gas filters are impregnated with a precious-metal (or other composition) oxidation catalyst and operated at a temperature at which substantial organics and carbon-monoxide oxidation occurs as the gas passes through the catalyzed filters.
  • a precious-metal (or other composition) oxidation catalyst As disclosed in U.S. Patent 5,221 ,484, while the use of such catalyzed filters is preferred, an alternative is to use a separate or additional catalytic converter of the same or different oxidation catalyst downstream of the gas filters.
  • Such catalytic converters can be ceramic monolith-based, as are currently and widely used for pollution control for exhaust aftertreatment for automobiles and diesel trucks.
  • the filtered, clean exhaust gas is returned, in an EGR process, to the diesel- engine intake where it is mixed with fresh inlet air.
  • EGR process is disclosed in U.S. Patent 5,426,936 and described in SAE Technical Paper No. 940460 (included in SAE Publication "Diesel Exhaust Aftertreatment” 1994, SP-1020).
  • EGR with filtered, particle-free gas is highly preferred, in that it prevents introduction of particulate soot and sulfates into the diesel engine.
  • EGR with exhaust gas filtered through the preferred oxidation-catalyst, ceramic monolith filters, significantly suppresses NOx formation, as shown by the data in Figure 2, with NOx reduction efficiency achieved at different engine loads and EGR rates.
  • EGR can be undesirable in that it increases carbon-monoxide generation.
  • the use of an oxidation catalyst specific for carbon-monoxide oxidation reduces carbon-monoxide emissions to levels
  • VOC 10 (VOC) oxidation has been successfully tested for VOC oxidation for various industrial sources.
  • the process combines, in a very compact system, a diesel-engine emissions-control process for particulate removal, catalytic oxidation of carbon monoxide and noncondensed organics, and suppression of NOx

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (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)
  • Geometry (AREA)
  • Physics & Mathematics (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

Cette invention se rapporte à un système de post-traitement de l'échappement (32) d'un moteur diesel (12) et au procédé (10) correspondant. Le procédé en question consiste à filtrer les gaz d'échappement au moyen d'un filtre (24) céramique, monolithique, catalyseur d'oxydation, de manière à extraire les particules et la suie, puis à oxyder (24) les gaz d'échappement filtrés de manière à oxyder les hydrocarbures non oxydés. On soumet ensuite périodiquement le filtre à un nettoyage pneumatique au moyen d'un fluide comprimé (14), tel que de l'air sous pression, de façon à extraire les particules et la suie du filtre (24).
PCT/US1998/017583 1997-08-29 1998-08-25 Systeme de post-traitement de l'echappement d'un moteur diesel et procede correspondant WO1999010632A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US5719997P 1997-08-29 1997-08-29
US60/057,199 1997-08-29

Publications (1)

Publication Number Publication Date
WO1999010632A1 true WO1999010632A1 (fr) 1999-03-04

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Application Number Title Priority Date Filing Date
PCT/US1998/017583 WO1999010632A1 (fr) 1997-08-29 1998-08-25 Systeme de post-traitement de l'echappement d'un moteur diesel et procede correspondant
PCT/US1998/017927 WO1999010633A1 (fr) 1997-08-29 1998-08-28 Systeme et procede de retraitement de gaz d'echappement de moteurs diesel

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Application Number Title Priority Date Filing Date
PCT/US1998/017927 WO1999010633A1 (fr) 1997-08-29 1998-08-28 Systeme et procede de retraitement de gaz d'echappement de moteurs diesel

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2787137A1 (fr) * 1998-12-14 2000-06-16 Ecia Equip Composants Ind Auto Dispositif de depollution des gaz d'echappement
EP1455059A1 (fr) * 2003-03-03 2004-09-08 J. Eberspächer GmbH & Co. Procédé et dispositif de nettoyage d'un filtre à particules
CN102872662A (zh) * 2011-07-15 2013-01-16 上海袋式除尘配件有限公司 一种直角带法兰式脉冲阀

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EP2554238B1 (fr) * 2011-08-05 2013-12-18 Pall Corporation Système de filtre catalytique
CN102600684A (zh) * 2012-03-15 2012-07-25 温州菲德石化科技有限公司 内置式催化剂罐顶自动反吹过滤器
US10239009B2 (en) 2013-03-14 2019-03-26 Lawrence Livermore National Security, Llc Continuously-operable flow stream processing system and method
WO2014169967A1 (fr) * 2013-04-15 2014-10-23 Haldor Topsøe A/S Procédé et système de retrait de particules de suie, de cendres et de métaux lourds d'un gaz d'échappement de moteur
CA2954013A1 (fr) 2014-08-25 2016-03-03 Haldor Topsoe A/S Procede et systeme d'elimination de particules de suie et de metaux lourds d'un gaz d'echappement de moteur
EP3212310B1 (fr) 2014-10-29 2019-12-11 Ecospray Technologies S.r.l. Appareil comportant un réacteur à granulés pour le traitement d'agents polluants présents dans des gaz industriels contenant des matières particulaires et procédé de traitement mis en oeuvre par ledit appareil
JP6745813B2 (ja) 2015-03-23 2020-08-26 ハルドール・トプサー・アクチエゼルスカベット エンジン排ガス又はプロセス装置から粒状物質を除去するための方法及びシステム

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US5390492A (en) * 1992-02-21 1995-02-21 Northeastern University Flow-through particulate incineration system coupled to an aerodynamically regenerated particulate trap for diesel engine exhaust gas
US5426936A (en) * 1992-02-21 1995-06-27 Northeastern University Diesel engine exhaust gas recirculation system for NOx control incorporating a compressed air regenerative particulate control system
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