WO1996019645A1 - Dispositif de purification de gaz d'echappement avec un filtre a particules pour gaz de combustion contenant du carbone - Google Patents

Dispositif de purification de gaz d'echappement avec un filtre a particules pour gaz de combustion contenant du carbone Download PDF

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Publication number
WO1996019645A1
WO1996019645A1 PCT/DE1995/001727 DE9501727W WO9619645A1 WO 1996019645 A1 WO1996019645 A1 WO 1996019645A1 DE 9501727 W DE9501727 W DE 9501727W WO 9619645 A1 WO9619645 A1 WO 9619645A1
Authority
WO
WIPO (PCT)
Prior art keywords
particle filter
exhaust gas
copper
purification device
gas purification
Prior art date
Application number
PCT/DE1995/001727
Other languages
German (de)
English (en)
Inventor
Wolfgang Pfister
Original Assignee
Firma J. Eberspächer
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 Firma J. Eberspächer filed Critical Firma J. Eberspächer
Publication of WO1996019645A1 publication Critical patent/WO1996019645A1/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
    • B01D46/2418—Honeycomb filters
    • 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
    • B01D46/80—Chemical processes for the removal of the retained particles, e.g. by burning
    • B01D46/84—Chemical processes for the removal of the retained particles, e.g. by burning by heating 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
    • F01N3/022—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 characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
    • F01N3/0222—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 characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being monolithic, e.g. honeycombs
    • 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
    • F01N3/025—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 using fuel burner or by adding fuel to exhaust
    • 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
    • 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
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/06—Ceramic, e.g. 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
    • 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

Definitions

  • the invention relates to an exhaust gas purification device with a particle filter for carbon-containing combustion gases according to the preamble of claim 1.
  • the particle filters are designed as candle wound filters, which act as depth filters. These wound filters consist of roughened ceramic yarn, which is wound on perforated support tubes. Here the particles settle in the felt spaces between the windings.
  • the copper is superficially applied to these wound filters.
  • the copper coating serves to reduce the ignition or combustion temperature for the carbon-containing particles which are soot in the exhaust gases of diesel engines.
  • the initiation of the reaction required for ignition takes place partly by injecting acetylacetone or similar reagents.
  • a disadvantage of the aforementioned particle filters is the possible detachment of fiber particles during long operating times. This danger exists to an increased degree in the case of ceramic fibers coated with copper, since the yarn strength is reduced by the coating. Dissolved copper-containing fiber particles get into the atmosphere with the exhaust gases and are therefore harmful to the environment. In addition, copper can be discharged to such an extent that the one to be caused by it Lowering the ignition and burn-off temperature is no longer guaranteed in full. This can have the consequence that copper also has to be added together with the above-mentioned activating agents.
  • Copper-coated ceramic yarn wound filters have so far been used without an additional energy dispenser, such as an additional burner, for example, to raise the temperature on the particle filter for the initiation of a soot burning process.
  • an additional energy dispenser such as an additional burner
  • the burn-off temperature is usually reduced to such an extent that a sufficient frequency of burning can take place solely because of the exhaust-gas temperatures prevailing in certain engine operating states.
  • high temperatures additionally increase the yarn resistance and thus the risk of coated fiber particles being discharged.
  • the invention is concerned with the problem of making an exhaust gas cleaning device equipped with a generic particle combustion filter more reliable and thus more environmentally friendly. Furthermore, the device should be able to be operated in an energy-saving manner.
  • the copper can expediently be applied in a manner known per se as a superficial layer or can also be added as a powder to the starting material for the porous bodies.
  • the material of the porous particle filter body according to the invention can be ceramic or sintered metal.
  • the filter body can also consist of pressed and / or sintered metal fibers. Cordierite can be used particularly advantageously as the starting material for a ceramic monolith. With these materials, the copper can simply be mixed into the raw materials. In this way, good integration, adhesive strength and distribution are achieved.
  • porous coated bodies such as monoliths in particular, enables a temporary connection of external energy sources to increase the temperatures at the filter, in order to reliably avoid soot clogging due to extremely long times with low exhaust gas temperatures when the engine operating conditions are unfavorable for burning to be able to.
  • An expedient external energy dispenser can, for example, be an additional burner for the exhaust gas device.
  • a small additional energy is sufficient to initiate a burn-off process. This in turn means the possibility of using small and energy-saving additional burners.
  • the exhaust gas end temperatures can thus also be kept relatively low when the particle filter is regenerated by burning off.
  • FIG. 1 a perspective view of a partially cut exhaust gas purification device with a particle filter.
  • a ceramic monolith coated with copper on the surface is located in a housing 1 as a particle filter 2.
  • An additional soot burner 5 is attached to the housing 1 upstream of the particle filter 2. This can be activated if, during extremely long operating times with exhaust gas temperatures that are too low for self-igniting combustion, the soot deposit exceeds a predetermined maximum dimension. This maximum dimension can be determined by ongoing measurements during engine operation using methods known per se for this purpose and can be used as a trigger for switching on the soot burner 5.
  • the monolith serving as the particle filter 2 is copper-coated or doped with copper and the burning temperature is therefore relatively low per se, a small-sized soot burner 5 with a very low burner output can be used. This is an essential advantage of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Filtering Materials (AREA)

Abstract

L'invention concerne un dispositif de purification de gaz d'échappement avec un filtre à particules pour gaz de combustion contenant du carbone, provenant notamment de moteurs à combustion interne, qui peut être régénéré par brûlage des particules de carbones déposées et est muni de cuivre afin d'abaisser la température de réaction de brûlage. Afin d'obtenir un dispositif de purification de gaz d'échappement de ce type qui soit plus fiable, plus écologique et consomme par conséquent moins d'énergie, il est prévu que le filtre à particules (2) soit un filtre superficiel et soit réalisé dans un matériau poreux compact monobloc.
PCT/DE1995/001727 1994-12-20 1995-12-01 Dispositif de purification de gaz d'echappement avec un filtre a particules pour gaz de combustion contenant du carbone WO1996019645A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9420371U DE9420371U1 (de) 1994-12-20 1994-12-20 Abgasreinigungsvorrichtung mit einem Partikelfilter für kohlenstoffhaltige Verbrennungsgase
DEG9420371.7U 1994-12-20

Publications (1)

Publication Number Publication Date
WO1996019645A1 true WO1996019645A1 (fr) 1996-06-27

Family

ID=6917660

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1995/001727 WO1996019645A1 (fr) 1994-12-20 1995-12-01 Dispositif de purification de gaz d'echappement avec un filtre a particules pour gaz de combustion contenant du carbone

Country Status (2)

Country Link
DE (1) DE9420371U1 (fr)
WO (1) WO1996019645A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7192796B2 (en) 2003-07-03 2007-03-20 Tessera Technologies Hungary Kft. Methods and apparatus for packaging integrated circuit devices
EP2730293A1 (fr) * 2012-11-13 2014-05-14 Heyer Medical AG Filtre à gaz avev cuivre destiné à éliminer les bactéries et virus d'un volume de gaz

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63140810A (ja) * 1986-12-04 1988-06-13 Cataler Kogyo Kk パテイキユレ−ト燃焼用触媒フイルタ
EP0291704A1 (fr) * 1987-05-16 1988-11-23 Dornier Gmbh Revêtement à effet catalytique de materiau filtrant pour filtre à suie de moteur Diesel
JPS6487816A (en) * 1987-09-29 1989-03-31 Matsushita Electric Ind Co Ltd Exhaust gas purification device for diesel
EP0336883A1 (fr) * 1988-04-08 1989-10-11 Per Stobbe Méthode pour filtrer des particules d'un gaz de fumée, un filtre pour gaz de fumée et un véhicule

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63140810A (ja) * 1986-12-04 1988-06-13 Cataler Kogyo Kk パテイキユレ−ト燃焼用触媒フイルタ
EP0291704A1 (fr) * 1987-05-16 1988-11-23 Dornier Gmbh Revêtement à effet catalytique de materiau filtrant pour filtre à suie de moteur Diesel
JPS6487816A (en) * 1987-09-29 1989-03-31 Matsushita Electric Ind Co Ltd Exhaust gas purification device for diesel
EP0336883A1 (fr) * 1988-04-08 1989-10-11 Per Stobbe Méthode pour filtrer des particules d'un gaz de fumée, un filtre pour gaz de fumée et un véhicule

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 8919, Derwent World Patents Index; Class H06, AN 89-142155 *
PATENT ABSTRACTS OF JAPAN vol. 12, no. 392 (M - 755) 19 October 1988 (1988-10-19) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7192796B2 (en) 2003-07-03 2007-03-20 Tessera Technologies Hungary Kft. Methods and apparatus for packaging integrated circuit devices
EP2730293A1 (fr) * 2012-11-13 2014-05-14 Heyer Medical AG Filtre à gaz avev cuivre destiné à éliminer les bactéries et virus d'un volume de gaz

Also Published As

Publication number Publication date
DE9420371U1 (de) 1995-02-23

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