WO2004016913A2 - Soot filter device with regeneration resistor protection - Google Patents

Soot filter device with regeneration resistor protection Download PDF

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Publication number
WO2004016913A2
WO2004016913A2 PCT/FR2003/050031 FR0350031W WO2004016913A2 WO 2004016913 A2 WO2004016913 A2 WO 2004016913A2 FR 0350031 W FR0350031 W FR 0350031W WO 2004016913 A2 WO2004016913 A2 WO 2004016913A2
Authority
WO
WIPO (PCT)
Prior art keywords
heating element
electrical characteristic
soot
electrical
temperature
Prior art date
Application number
PCT/FR2003/050031
Other languages
French (fr)
Other versions
WO2004016913A3 (en
Inventor
Christian-Charles Garabedian
Daniel Teboul
Julien Bertolini
Original Assignee
Faurecia Systemes D'echappepent
Recycl'air
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 Faurecia Systemes D'echappepent, Recycl'air filed Critical Faurecia Systemes D'echappepent
Priority to AU2003283518A priority Critical patent/AU2003283518A1/en
Publication of WO2004016913A2 publication Critical patent/WO2004016913A2/en
Publication of WO2004016913A3 publication Critical patent/WO2004016913A3/en

Links

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
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/66—Applications of electricity supply techniques
    • B03C3/68—Control systems therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/88—Cleaning-out collected 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
    • F01N3/01—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust by means of electric or electrostatic separators
    • 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
    • F01N3/027—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 electric or magnetic heating means
    • 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
    • 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
    • Y02T10/40—Engine management systems

Definitions

  • 1 invention relates to a device for filtering soot present in a gas flow, in particular an electrostatic precipitator.
  • the soot filtration device comprises a deposit zone where said soot is at least partly collected.
  • the filtration device according to the invention comprises means for eliminating the collected soot using a heating element, in particular an electrical resistance, connected to an electrical supply allowing regeneration by combustion of the soot.
  • control of the temperature of the heating element allowing regeneration is necessary because the combustion of the soot deposited on said electrical resistance of the heating element is exothermic. Temperature measurements have shown that the generated exotherms can very easily lead to the destruction of the heating element by fusion.
  • the filtration device according to the invention is more particularly designed to protect the heating elements (1).
  • the filtration device comprises: a device for measuring (2) an electrical characteristic of said heating element (1), in particular a measuring resistance,
  • control means for uncoupling, at least in part, said electrical supply from said heating element (1) when the measurement of said electrical characteristic exceeds said threshold value.
  • the single figure shows an example of a device according to the invention.
  • the filtration device makes it possible to implement temperature regulation of the heating element (s) (1) without using a temperature sensor, in particular of the thermocouple type. Such regulation avoiding the use of a temperature sensor is advantageous. Indeed, in particular in the case of an electrostatic precipitator, the use of a thermocouple or of another device is prohibited for technical and economic reasons.
  • heating element 1. 2 can be for example a measurement resistor.
  • the value of the electrical characteristic measured is compared (4) to a threshold value of said electrical characteristic; in fact, the temperature value deduced from the correspondence table 3 is compared with a threshold temperature value which one does not wish to exceed.
  • step 3) Depending on the comparison carried out in step 3) it is decided whether or not to interrupt (in whole or in part) the supply of the heating element 1.
  • step 2 knowledge of the temperature value (step 2) is not necessary to protect the resistance of the heating element (1), by regulating the temperature thereof.
  • the flow and temperature of the gases present in the exhaust line greatly influence the temperature of the resistor; thus, when the engine is at an operating point for which the gas flow rate will be high, a large number of the calories emitted by the resistance will be dissipated in the flow.
  • the temperature deduction carried out in step 2) is preferably carried out using several temperature + f (Resistance) correspondence tables, each of these tables being representative of a particular operating point of the engine and therefore conditions influencing the temperature of the resistor.
  • the DSP chooses the appropriate correspondence table, deduces a resistance temperature, compares it to the threshold temperature value and, if necessary, acts on the means for controlling the electrical supply of the resistance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Electrostatic Separation (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Measuring Volume Flow (AREA)

Abstract

The invention concerns a device for filtering soot particles present in a gas stream, in particular an electrostatic precipitator. The soot filtering device comprises a deposition zone where the soot particles are at least partly collected. The filtering device comprises means for eliminating the collected suit particles by means of a heating element (1), in particular an electrical resistor, connected to an electric power supply. The filtering device comprises: a device for measuring (2) one electrical characteristic of said heating element, in particular a measuring resistor, comparing means (4) for comparing the measurement of said electrical characteristic with a threshold value of said electrical characteristic, control means for disconnecting, at least partly, said electric power supply of said heating element when said electrical characteristic measurement exceeds said threshold value. The filtering device is more particularly designed to protect the heating element (1) during regenerating exothermal phases.

Description

DISPOSITIF DE FILTRATION DE SUIES A PROTECTION DES RESISTANCES SOOT FILTERING DEVICE WITH RESISTANCE PROTECTION
DE RÉGÉNÉRATIONOF REGENERATION
1 invention concerne un dispositif de filtration des suies présentes dans un flux gazeux, notamment un électrofiltre .1 invention relates to a device for filtering soot present in a gas flow, in particular an electrostatic precipitator.
Le dispositif de filtration de suies comporte une zone de dépôt où lesdites suies sont au moins en partie collectées. Le dispositif de filtration selon l'invention comporte des moyens d' élimination des suies collectées mettant en œuvre un élément chauffant, notamment une résistance électrique, connecté à une alimentation électrique permettant une régénération par combustion des suies . Dans un tel dispositif de filtration de suies, le contrôle de la température de l'élément chauffant permettant la régénération est nécessaire car la combustion de la suie déposée sur ladite résistance électrique de l'élément chauffant est exothermique . Des mesures de température ont montré que les exothermes engendrés pouvaient très facilement entraîner la destruction de l'élément chauffant par fusion.The soot filtration device comprises a deposit zone where said soot is at least partly collected. The filtration device according to the invention comprises means for eliminating the collected soot using a heating element, in particular an electrical resistance, connected to an electrical supply allowing regeneration by combustion of the soot. In such a soot filtration device, control of the temperature of the heating element allowing regeneration is necessary because the combustion of the soot deposited on said electrical resistance of the heating element is exothermic. Temperature measurements have shown that the generated exotherms can very easily lead to the destruction of the heating element by fusion.
Le dispositif de filtration selon l'invention est plus particulièrement conçu pour protéger les éléments chauffants (1) .The filtration device according to the invention is more particularly designed to protect the heating elements (1).
Le dispositif de filtration selon l'invention comprend : - un dispositif de mesure (2) d'une caractéristique électrique dudit élément chauffant (1) , notamment une résistance de mesure,The filtration device according to the invention comprises: a device for measuring (2) an electrical characteristic of said heating element (1), in particular a measuring resistance,
- des moyens de comparaison (4) pour comparer la mesure de ladite caractéristique électrique avec une valeur de seuil de ladite caractéristique électrique,- comparison means (4) for comparing the measurement of said electrical characteristic with a threshold value of said electrical characteristic,
- des moyens de commande pour désaccoupler, au moins en partie, ladite alimentation électrique dudit élément chauffant (1) lorsque la mesure de ladite caractéristique électrique excède ladite valeur de seuil.- control means for uncoupling, at least in part, said electrical supply from said heating element (1) when the measurement of said electrical characteristic exceeds said threshold value.
La figure unique montre un exemple de dispositif selon 1' invention.The single figure shows an example of a device according to the invention.
Le dispositif de filtration selon l'invention permet de mettre en œuvre une régulation de température de l' élément-s* chauffant (1) sans faire appel à un capteur de température, notamment du type thermocouple. Une telle régulation évitant la mise en œuvre d'un capteur de température est avantageuse. En effet, en particulier dans le cas d'un électrofiltre, l'usage d'un thermocouple ou d'un autre dispositif est proscrit pour des raisons techniques et économiques. Selon l'invention, l'information de température est accessible grâce à la relation Température = f (Résistance) . En effet, pour- un élément chauffant (1) donné, on peut établir une table de correspondance entre la température et une caractéristique électrique de l'élément chauffant, notamment entre la température et la valeur de la résistance électrique de l'élément chauffant : Température = f (Résistance) .The filtration device according to the invention makes it possible to implement temperature regulation of the heating element (s) (1) without using a temperature sensor, in particular of the thermocouple type. Such regulation avoiding the use of a temperature sensor is advantageous. Indeed, in particular in the case of an electrostatic precipitator, the use of a thermocouple or of another device is prohibited for technical and economic reasons. According to the invention, the temperature information is accessible thanks to the relation Temperature = f (Resistance). Indeed, for a given heating element (1), it is possible to establish a correspondence table between the temperature and an electrical characteristic of the heating element, in particular between the temperature and the value of the electrical resistance of the heating element: Temperature = f (Resistance).
Pour protéger la résistances électrique de l'élément chauffant, on procède de la manière suivante : 1) On mesure en 2 une caractéristique électrique deTo protect the electrical resistance of the heating element, proceed as follows: 1) We measure in 2 an electrical characteristic of
1 ' élément chauffant 1. 2 peut être par exemple une résistance de mesure.1 heating element 1. 2 can be for example a measurement resistor.
2) On peut déduire la température de la mesure effectuée à l'étape 1) à l'aide d'une table de correspondance Température = f (Résistance) 3 préalablement établie et correspondant à 1 ' élément chauffant 1.2) The temperature can be deduced from the measurement carried out in step 1) using a correspondence table Temperature = f (Resistance) 3 previously established and corresponding to the heating element 1.
3) On compare (4) la valeur de la caractéristique électrique mesurée à une valeur de seuil de ladite caractéristique électrique ; en fait on compare la valeur de température déduite de la table de correspondance 3 à une valeur de température seuil que l'on ne souhaite pas dépasser.3) The value of the electrical characteristic measured is compared (4) to a threshold value of said electrical characteristic; in fact, the temperature value deduced from the correspondence table 3 is compared with a threshold temperature value which one does not wish to exceed.
4) En fonction de la comparaison effectuée à l'étape 3) on décide d'interrompre ou non (en totalité ou en partie) l'alimentation de l'élément chauffant 1.4) Depending on the comparison carried out in step 3) it is decided whether or not to interrupt (in whole or in part) the supply of the heating element 1.
On notera qu'après étalonnage, la connaissance de la valeur de la température (étape 2) n'est pas nécessaire pour protéger la résistance de l'élément chauffant (1), en régulant la température de celui-ci. En fonction du point de fonctionnement moteur du véhicule, le débit et la température des gaz présents dans la ligne d' échappement influent grandement sur la température de la résistance ; ainsi, lorsque le moteur se trouve à un point de fonctionnement pour lequel le débit de flux de gaz sera important, un grand nombre des calories émises par la résistance sera dissipé dans le flux. C'est pourquoi la déduction de température effectuée à l'étape 2) est préférentiellement effectuée à l'aide de plusieurs tables de correspondances Température + f (Résistance) , chacune de ces tables étant représentative d'un point de fonctionnement particulier du moteur et par conséquent des conditions influant sur la température de la résistance. Ainsi, on peut réaliser une table Température = f (Résistance) correspondant au fonctionnement moteur : - lorsque le véhicule est à l'arrêt (moteur en marche)It will be noted that after calibration, knowledge of the temperature value (step 2) is not necessary to protect the resistance of the heating element (1), by regulating the temperature thereof. Depending on the engine operating point of the vehicle, the flow and temperature of the gases present in the exhaust line greatly influence the temperature of the resistor; thus, when the engine is at an operating point for which the gas flow rate will be high, a large number of the calories emitted by the resistance will be dissipated in the flow. This is why the temperature deduction carried out in step 2) is preferably carried out using several temperature + f (Resistance) correspondence tables, each of these tables being representative of a particular operating point of the engine and therefore conditions influencing the temperature of the resistor. Thus, a Temperature = f (Resistance) table corresponding to the engine operation can be produced: - when the vehicle is stopped (engine running)
- pour un régime de 1000 tours/min- for a speed of 1000 rpm
- pour un régime de 2500 tours/min- for a speed of 2500 rpm
- pour un régime de 4000 tours/min Bien évidemment d' autres points peuvent être choisis en fonction du moteur considéré.- for a speed of 4000 rpm Obviously other points can be chosen according to the engine considered.
L' information relative au point de fonctionnement moteur est envoyée par l'unité électronique de contrôle moteur (non représentée ici) au DSP (processeur numérique) dans lequel ont été préalablement entrées les différentes tables de correspondances Température = f (Résistance) .The information relating to the engine operating point is sent by the electronic engine control unit (not shown here) to the DSP (digital processor) into which the various temperature = f (Resistance) correspondence tables have been previously entered.
En fonction de cette information, le DSP choisit la table de correspondance adéquate, en déduit une température de résistance, la compare à la valeur de température seuil et, au besoin, agit sur les moyens de commande de l'alimentation électrique de la résistance . Based on this information, the DSP chooses the appropriate correspondence table, deduces a resistance temperature, compares it to the threshold temperature value and, if necessary, acts on the means for controlling the electrical supply of the resistance.

Claims

REVENDICATION CLAIM
1. Dispositif de filtration des suies présentes dans un flux gazeux ; ledit dispositif de filtration de suies comportant une zone de dépôt où lesdites suies sont au moins en partie collectées ; ledit dispositif de filtration comportant des moyens d' élimination des suies collectées mettant en œuvre un élément chauffant (1) , notamment une résistance électrique, connecté à une alimentation électrique ; ledit dispositif de filtration étant plus particulièrement conçu pour protéger ledit élément chauffant (1) ; ledit dispositif de filtration comprenant :1. Device for filtering soot present in a gas flow; said soot filtration device comprising a deposit zone where said soot is at least partially collected; said filtration device comprising means for removing the collected soot using a heating element (1), in particular an electrical resistance, connected to an electrical supply; said filtration device being more particularly designed to protect said heating element (1); said filtration device comprising:
- un dispositif de mesure (2) d'une caractéristique électrique dudit élément chauffant (1) , notamment une résistance de mesure, - des moyens de comparaison (4) pour comparer la mesure de ladite caractéristique électrique avec une valeur de • seuil de ladite caractéristique électrique,- a device (2) for measuring an electrical characteristic of said heating element (1), in particular a measuring resistor, - comparison means (4) for comparing the measurement of said electrical characteristic with a value of • threshold of said electrical characteristic,
- des moyens de commande pour désaccoupler, au moins en partie, ladite alimentation électrique dudit élément chauffant lorsque la mesure de ladite caractéristique électrique excède ladite valeur de seuil. - control means for uncoupling, at least in part, said electrical supply from said heating element when the measurement of said electrical characteristic exceeds said threshold value.
PCT/FR2003/050031 2002-08-14 2003-08-14 Soot filter device with regeneration resistor protection WO2004016913A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003283518A AU2003283518A1 (en) 2002-08-14 2003-08-14 Soot filter device with regeneration resistor protection

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0210340A FR2843547B1 (en) 2002-08-14 2002-08-14 PROTECTION OF REGENERATION RESISTORS IN AN ELECTROFILTER
FR02/10340 2002-08-14

Publications (2)

Publication Number Publication Date
WO2004016913A2 true WO2004016913A2 (en) 2004-02-26
WO2004016913A3 WO2004016913A3 (en) 2004-04-08

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Application Number Title Priority Date Filing Date
PCT/FR2003/050031 WO2004016913A2 (en) 2002-08-14 2003-08-14 Soot filter device with regeneration resistor protection

Country Status (3)

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AU (1) AU2003283518A1 (en)
FR (1) FR2843547B1 (en)
WO (1) WO2004016913A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2906565A1 (en) * 2006-10-02 2008-04-04 Renault Sas Exhaust gas particle elimination system diagnosing method for motor vehicle, involves detecting defect of opening of switch and detecting functioning of electric source, and implementing elimination of particles by heating elements

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5350441A (en) * 1990-03-15 1994-09-27 Wilhelm Environmental Technologies, Inc. Flue gas conditioning system
EP0919286A2 (en) * 1997-11-26 1999-06-02 Funai Electric Co., Ltd. Method for self-cleaning a dust collection electrode of an electrostatic precipitator for air conditioner use

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5350441A (en) * 1990-03-15 1994-09-27 Wilhelm Environmental Technologies, Inc. Flue gas conditioning system
EP0919286A2 (en) * 1997-11-26 1999-06-02 Funai Electric Co., Ltd. Method for self-cleaning a dust collection electrode of an electrostatic precipitator for air conditioner use

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2906565A1 (en) * 2006-10-02 2008-04-04 Renault Sas Exhaust gas particle elimination system diagnosing method for motor vehicle, involves detecting defect of opening of switch and detecting functioning of electric source, and implementing elimination of particles by heating elements
WO2008040905A1 (en) * 2006-10-02 2008-04-10 Renault S.A.S. Diagnostics method and diagnostic device for a system for eliminating particles from exhaust gas

Also Published As

Publication number Publication date
AU2003283518A1 (en) 2004-03-03
FR2843547A1 (en) 2004-02-20
WO2004016913A3 (en) 2004-04-08
FR2843547B1 (en) 2004-09-17
AU2003283518A8 (en) 2004-03-03

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