FR2843546A1 - Electrostatic air filter avoiding formation of electrical arc discharges, uses ceramic coating over electrode with highest absolute voltage to allow reduction of applied voltage while maintaining electric field strength - Google Patents

Electrostatic air filter avoiding formation of electrical arc discharges, uses ceramic coating over electrode with highest absolute voltage to allow reduction of applied voltage while maintaining electric field strength Download PDF

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Publication number
FR2843546A1
FR2843546A1 FR0210336A FR0210336A FR2843546A1 FR 2843546 A1 FR2843546 A1 FR 2843546A1 FR 0210336 A FR0210336 A FR 0210336A FR 0210336 A FR0210336 A FR 0210336A FR 2843546 A1 FR2843546 A1 FR 2843546A1
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FR
France
Prior art keywords
electric field
field strength
air filter
ceramic coating
voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
FR0210336A
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French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RECYCL AIR
Faurecia Systemes dEchappement SAS
Original Assignee
RECYCL AIR
Faurecia Systemes dEchappement SAS
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 RECYCL AIR, Faurecia Systemes dEchappement SAS filed Critical RECYCL AIR
Priority to FR0210336A priority Critical patent/FR2843546A1/en
Publication of FR2843546A1 publication Critical patent/FR2843546A1/en
Pending legal-status Critical Current

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Classifications

    • 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
    • B03C3/40—Electrode constructions
    • B03C3/60—Use of special materials other than liquids
    • B03C3/62—Use of special materials other than liquids ceramics
    • 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
    • B03C3/70—Applications of electricity supply techniques insulating in electric separators

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Electrostatic Separation (AREA)

Abstract

The electrostatic filter has electrodes to which a high voltage is applied. An insulating layer, preferably of ceramic, covers all or part of one of the electrodes, particularly the electrode with the highest absolute potential. This allows reduction of the applied high voltage without reduction in the electric field strength between electrodes.

Description

ii

ELECTRO FILTRE PERMETTANT D' EVITER LA FORMATION D'ARCS ELECTRIQUES  ELECTRO FILTER FOR AVOIDING ELECTRIC ARC FLOW

La présente invention concerne un électro filtre  The present invention relates to an electro-filter

permettant d'éviter la formation d'arcs électriques.  avoiding the formation of electric arcs.

Un électro filtre est un dispositif pour lequel le taux d'efficacité repose en grande partie sur la valeur et la 5 nature de la haute tension appliquée. Or en fonction des paramètres de l'air à filtrer (température, pression et humidité) et des caractéristiques de la matière à retenir dans le filtre, il se produit très fréquemment des arcs électriques en différents endroits dans le filtre, ramenant la tension 10 appliquée à la valeur de tension d'arc (quelques volts) et annulant l'effet de filtration électrique pendant ces événements. L'électro filtre selon l'invention comprend des électrodes auxquelles sont appliquées une haute tension. 15 L'électro filtre comporte une couche isolante, notamment une couche de céramique ou d'émail, recouvrant au moins tout ou partie d'une des électrodes, notamment l'électrode dont le potentiel est le plus élevé en valeur absolue. Ainsi, la valeur de la haute tension appliquée aux électrodes peut être réduite 20 tout en maintenant un champ électrique suffisant pour garantir  An electro-filter is a device for which the efficiency rate is largely based on the value and the nature of the high voltage applied. However, depending on the parameters of the air to be filtered (temperature, pressure and humidity) and the characteristics of the material to be retained in the filter, electric arcs very often occur in different places in the filter, reducing the applied voltage. to the arc voltage value (a few volts) and canceling the electrical filtration effect during these events. The electro-filter according to the invention comprises electrodes to which a high voltage is applied. The electro-filter comprises an insulating layer, in particular a ceramic or enamel layer, covering at least all or part of one of the electrodes, in particular the electrode whose potential is the highest in absolute value. Thus, the value of the high voltage applied to the electrodes can be reduced while maintaining a sufficient electric field to guarantee

un taux de filtration élevé.a high filtration rate.

La solution apportée par la présente invention pour  The solution provided by the present invention for

résoudre ce problème consiste à recouvrir d'une couche de céramique ou de matériau isolant l'électrode portée au potentiel le plus élevé en valeur absolue. On montre dans ce cas là que 5 pour une épaisseur d'isolant el, de permittivité relative sl et pour une différence de potentiel V, le champ électrique E2 dans la zone " air " est plus grand que celui dans la zone isolant.  solving this problem consists in covering with a layer of ceramic or insulating material the electrode brought to the highest potential in absolute value. It is shown in this case that 5 for an insulator thickness el, of relative permittivity sl and for a potential difference V, the electric field E2 in the "air" area is greater than that in the insulator area.

De même, le rapport entre le champ électrique dans l'air dans ce cas et celui obtenu dans une configuration sans isolant est plus 10 grand que 1. La solution proposée permet donc de résoudre le problème en diminuant la valeur de la haute tension appliquée tout en maintenant un champ électrique important entre les 2 électrodes de forme quelconque de manière à garder un taux de  Similarly, the ratio between the electric field in the air in this case and that obtained in a configuration without insulation is greater than 10. The proposed solution therefore makes it possible to solve the problem by reducing the value of the high voltage applied while maintaining a large electric field between the 2 electrodes of any shape so as to keep a rate of

filtration élevé.high filtration.

Claims (1)

REVENDICATIONS 1. Electro filtre permettant d'éviter la formation d'arcs électriques; ledit électro filtre comprenant des électrodes auxquelles sont appliquées une haute tension; ledit électro filtre étant caractérisé en ce qu'il 5 comporte une couche isolante, notamment une couche de céramique, recouvrant au moins tout ou partie d'une desdites électrodes, notamment l'électrode dont le potentiel est le plus élevé en valeur absolue; (de sorte que la valeur de la haute tension appliquée 10 aux électrodes peut être réduite tout en maintenant un champ  1. Electro filter to avoid the formation of electric arcs; said electro-filter comprising electrodes to which a high voltage is applied; said electro-filter being characterized in that it comprises an insulating layer, in particular a ceramic layer, covering at least all or part of one of said electrodes, in particular the electrode whose potential is the highest in absolute value; (so that the value of the high voltage applied to the electrodes can be reduced while maintaining a field électrique suffisant pour garantir un taux de filtration élevé).  sufficient to guarantee a high filtration rate). i ii i
FR0210336A 2002-08-14 2002-08-14 Electrostatic air filter avoiding formation of electrical arc discharges, uses ceramic coating over electrode with highest absolute voltage to allow reduction of applied voltage while maintaining electric field strength Pending FR2843546A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0210336A FR2843546A1 (en) 2002-08-14 2002-08-14 Electrostatic air filter avoiding formation of electrical arc discharges, uses ceramic coating over electrode with highest absolute voltage to allow reduction of applied voltage while maintaining electric field strength

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0210336A FR2843546A1 (en) 2002-08-14 2002-08-14 Electrostatic air filter avoiding formation of electrical arc discharges, uses ceramic coating over electrode with highest absolute voltage to allow reduction of applied voltage while maintaining electric field strength

Publications (1)

Publication Number Publication Date
FR2843546A1 true FR2843546A1 (en) 2004-02-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR0210336A Pending FR2843546A1 (en) 2002-08-14 2002-08-14 Electrostatic air filter avoiding formation of electrical arc discharges, uses ceramic coating over electrode with highest absolute voltage to allow reduction of applied voltage while maintaining electric field strength

Country Status (1)

Country Link
FR (1) FR2843546A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0335143A2 (en) * 1988-03-30 1989-10-04 Johannes Alfons Müller Electrostatic separator for the separation of soot particles from an exhaust stream of combustion installations, or from combustion engines
US5348571A (en) * 1992-01-09 1994-09-20 Metallgesellschaft Aktiengesellschaft Apparatus for dedusting a gas at high temperature

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0335143A2 (en) * 1988-03-30 1989-10-04 Johannes Alfons Müller Electrostatic separator for the separation of soot particles from an exhaust stream of combustion installations, or from combustion engines
US5348571A (en) * 1992-01-09 1994-09-20 Metallgesellschaft Aktiengesellschaft Apparatus for dedusting a gas at high temperature

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