EP0715894B1 - Installation de filtrage électrostatique - Google Patents

Installation de filtrage électrostatique Download PDF

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Publication number
EP0715894B1
EP0715894B1 EP95116832A EP95116832A EP0715894B1 EP 0715894 B1 EP0715894 B1 EP 0715894B1 EP 95116832 A EP95116832 A EP 95116832A EP 95116832 A EP95116832 A EP 95116832A EP 0715894 B1 EP0715894 B1 EP 0715894B1
Authority
EP
European Patent Office
Prior art keywords
filter device
separator
tubes
gas ionizer
ionizer
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.)
Expired - Lifetime
Application number
EP95116832A
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German (de)
English (en)
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EP0715894A1 (fr
Inventor
Rolf Hertfelder
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Individual
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Individual
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Publication of EP0715894A1 publication Critical patent/EP0715894A1/fr
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Publication of EP0715894B1 publication Critical patent/EP0715894B1/fr
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    • 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
    • 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
    • B03C3/019—Post-treatment of gases
    • 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
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/04—Plant or installations having external electricity supply dry type
    • B03C3/06—Plant or installations having external electricity supply dry type characterised by presence of stationary tube electrodes
    • 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
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/04—Plant or installations having external electricity supply dry type
    • B03C3/12—Plant or installations having external electricity supply dry type characterised by separation of ionising and collecting stations
    • 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
    • B03C3/36—Controlling flow of gases or vapour
    • B03C3/368—Controlling flow of gases or vapour by other than static mechanical means, e.g. internal ventilator or recycler
    • 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
    • B03C3/41—Ionising-electrodes
    • 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
    • B03C3/45—Collecting-electrodes
    • B03C3/49—Collecting-electrodes tubular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes
    • 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
    • B03C2201/00—Details of magnetic or electrostatic separation
    • B03C2201/10—Ionising electrode has multiple serrated ends or parts

Definitions

  • the invention relates to an electrostatic filter device according to the preamble of claim 1.
  • a gas ionizer ionizes the Air to be cleaned so that the suspended particles contained in one separators connected to the gas ionizer on electrostatically charged ones Deposit separation areas.
  • the electrostatic precipitator is used by several concentrically arranged flexible metal hoses formed.
  • the one The gas ionizer upstream of the electrostatic precipitator has one cylindrical insulating body, on the spray electrodes in the form of a helically attached serrated tape are attached.
  • FR-A-21 45512 discloses a one provided with spray electrodes Ionizer in which deposition takes place only in the area in which is also the electrical charge through the airflow protruding spray electrodes (19) takes place.
  • For side distraction of the charged particle required electrical field (separation field) is in the essentially with the inhomogeneous field designed for charging Spray electrodes identical.
  • a deposition only takes place at the same time spray ionization taking place.
  • This facility therefore consists in essentially from an ionizer that charges the air particles and directly on deposits the ionist counter electrode. An additional separate separator is not provided here.
  • Such an ionizer has a high Percentage of ozone and nitrogen oxides to be expected, which is an use of the invention Cleaning of breathing air in living rooms and interiors would not allow but limited to the area of industrial gas cleaning. Furthermore, due to the protruding into the air flow Spray electrodes (19) and their holders (20, 21) considerable Turbulence in the airflow throughout the area taking place Deposition caused. When particles are deposited in the submicro ( ⁇ 1 ⁇ m), such turbulence is extremely disruptive and affect the efficiency of separation in this size range considerably. This known ionizer is because of its construction only suitable for large air particles that come from the wall with water washed off and washed away in a gutter.
  • From DE-C-3515508 is a device for cleaning the air in living and Lounges especially known from kitchens, where the ionized too cleaning air after flowing past the ionizer and decelerated the direction is reversed to follow appropriate Separator surfaces to be led past.
  • By braking and Reversal process of the air flow inevitably creates turbulence as well a pressure loss. Larger aerosols, such as those in the Kitchen occur, be well separated. Regarding smaller particles For example, tobacco smoke, this plant has become from the above Reasons not so proven.
  • the invention has for its object a concentrically constructed electrostatic filter device with as concentric as possible reliable and compact structure and the possibility of Separation of submicroparticles with the lowest possible ozone and Realize nitrogen oxide emissions.
  • the insulation body designed as a tube has on it cylindrical outer wall and on its cylindrical inner wall Spray electrodes, each at a distance from cylindrical Counter electrodes. It thus becomes one with respect to the insulation body outer and an inner annulus for ionization of the flowing gas provided. This allows the Ionizer with the same effectiveness compared to the conventional design a significantly shorter design to have.
  • the electronics can be inside the ionizer be housed by the inner, cylindrical Counter electrode is optimally shielded.
  • the metallic tubes of the separator in the Forehead area are held in the filter device, which faces away from the gas ionizer.
  • the opening edges the tubes of the separator that face the gas ionizer and directly connect to the gas ionizer, are free from annoying insulation elements.
  • the separator can thus optimally respond to the ionized flowing into it Act gas flow.
  • the parallel in the rear area insulation elements attached to the gas flow thus come only in contact with the already cleaned gas stream, causing electrical interference due to contamination or due to moisture in the area Isolation elements can be safely avoided.
  • the electrostatic precipitator preferably consists of several concentrically arranged metallic tubes that alternately on mass or on a negative High voltage potential.
  • the outer tube is located thereby at ground potential and at the same time forms the Counter electrode for the gas ionizer.
  • the same lies inner tube to ground potential and forms an ideal Faraday shielded housing to accommodate the Control electronics.
  • the insulation body carrying the spray electrodes can be made of a one-piece cylinder or from a series of Isolation rings exist between each Spray electrodes in the form of annular disks Intermediate layers are arranged.
  • This structure can be as Sandwich construction can be called the big advantage has that according to the respective requirements Insulation bodies of different lengths with spray electrodes can be assembled by simply plugging them together.
  • the intermediate layers are Longitudinal bolts connected together, the diameter the holes in the intermediate layers are kept somewhat smaller, than the diameter of the longitudinal screws. This results in an electrically conductive press fit over the Voltage contacting of the individual washers he follows.
  • the spray electrodes preferably consist of serrated, very thin-walled sheet metal, which is why you can also get from a metal foil can speak. Are in the direction of flow the jags of spray electrodes lying one behind the other Gap, so that an optimal distribution of the Spray electrodes in the entire air flow is given.
  • the Gas ionizer and the electrostatic precipitator Postfilter connected, for example as Activated carbon filter or ozone catalyst can.
  • the extractor hood 1 shown in Figure 1 contains one electrostatic filter device 2, something here is simplified and partially shown in section.
  • the filter device 2 consists of a gas ionizer 3 in lower area and a downstream electrostatic precipitator 4 in the middle area. Above the filter device has a fan 5 and one Filter cartridge 6 as a secondary filter. The flow direction for the gas flow to be cleaned is indicated by the direction arrow 7 specified.
  • the gas ionizer 3 consists of a tubular insulation body 8, the its cylindrical outside and its cylindrical Inner wall 9 has spray electrodes 10.
  • the spray electrodes 10 opposite cylindrical counter electrodes 11, 12 arranged, which are at ground potential.
  • the Spray electrodes 10, however, are on a negative high voltage potential, so in the two Annular spaces 13, 14 the gas stream flowing through ionizes becomes.
  • the ionized gas flow occurs after leaving the annular spaces 13, 14 in the electrostatic precipitator 4, the out there are five concentrically arranged tubes 15 to 19.
  • the opening edges 20, 21 facing the gas ionizer 3 Tubes 16, 17 project freely into the gas stream. Mounts or Fasteners that could disrupt the gas flow are in the transition area between gas ionizer 3 and Separator 4 completely avoided.
  • Required Isolation elements 22, 23 are located at the upper end of the Tubes 18, 21, where the gas stream already cleaned the Separator leaves again. All tubes 15 to 19 are in the end region 24 of the gas ionizer 3 facing away from it Openings fixed in the filter device.
  • the Gas ionizer 3 can preferably directly or several of the live tubes 16, 18 conductive be connected.
  • the filter device 2 consisting of gas ionizer 3 and the downstream one Separator 4 from one and the same high voltage source and the resulting same operating voltage operate.
  • Annuli 25 between those of the tubes 15 to 19 of the separator 4 are electrodes formed thus free of insulation elements.
  • the tube 15, the both the outer counter electrode for the gas ionizer 3 and also forms an electrode for the separator 4 acts at the same time as a Faraday cage for the inlay Parts.
  • the tubes 19 and the tubular form Counterelectrode 12 a Faraday cage for the here broken line, inside Electronics 26.
  • the filter device 2 In the front or lower area of the filter device 2 it has a protective cap 27 and a protective ring 28, Avoid condensation in the gas ionizer.
  • FIG. 3 shows the structure of an insulating ring 30 composite insulating body 8 shown. Between Insulating rings 30 are ring-shaped as intermediate layers Spray electrodes 31 are used which have a tooth edge 32 have. By means of the longitudinal screws 32 Insulating body 8 held together. The diameter of the Bores 34 in the intermediate layers 31 is somewhat smaller held as the diameter of the longitudinal screws 33 to the Voltage contacting by means of an electrically conductive To cause interference fit.
  • fan 5 depending on Use case can have different designs, whereby for example tangential or axial fans for Can come into play.

Claims (10)

  1. Dispositif de filtrage électrostatique comprenant: un ioniseur de gaz qui présente des électrodes d'émission fixées extérieurement à un corps isolant à symétrie de révolution et une électrode antagoniste cylindrique extérieure; et un séparateur électrostatique se branchant sur l'ioniseur de gaz dans le sens d'écoulement des gaz à purifier, lequel se compose de tubes métalliques agencés concentriquement et isolés les uns par rapport aux autres, entre lesquels est établi un champ à haute tension, caractérisé en ce que le corps isolant (8) est conçu comme un tube qui est raccordé, avec conduction, à l'un ou plusieurs des tubes métalliques (16, 18) sous tension et comporte également, sur sa paroi interne cylindrique (9), des électrodes d'émission (10) qui sont espacées d'une électrode antagoniste cylindrique interne (12),
    en ce que les tubes métalliques (15 à 19) du séparateur (4) sont fixés dans le dispositif de filtrage (2) dans la zone frontale (24) de leurs orifices orientés à l'opposé de l'ioniseur de gaz (3), et
    en ce que les espaces annulaires (25) ménagés entre les électrodes formées par les tubes (15 à 19) du séparateur (4) sont exempts d'éléments isolants.
  2. Dispositif de filtrage selon la revendication 1, caractérisé en ce qu'une partie des tubes (16, 18) situés sur un potentiel électrique différent sont raccordés au reste du dispositif de filtrage (2) au moyen d'isolateurs (24) en saillie sur leur bord d'orifice orienté à l'opposé de l'ioniseur de gaz (3).
  3. Dispositif de filtrage selon l'une des revendications qui précèdent, caractérisé en ce que l'électrode antagoniste cylindrique externe (11) prévue pour l'ioniseur de gaz (3) et le séparateur (4) qui s'y branche constitue une paroi de carcasse commune en forme de tube métallique (15) connectée à une masse.
  4. Dispositif de filtrage selon l'une des revendications qui précèdent, caractérisé en ce que l'électrode antagoniste cylindrique interne (12, 19) prévue pour l'ioniseur de gaz (3) et le séparateur (4) qui s'y branche constitue une paroi de carcasse commune en forme de tube métallique (19) connectée à une masse.
  5. Dispositif de filtrage selon l'une des revendications qui précèdent, caractérisé en ce que le corps isolant (8) se compose d'une série d'anneaux isolants (30), les électrodes d'émission (10) actives extérieurement et intérieurement étant intercalées sous forme de couches intermédiaires (31) en forme de rondelles entre les anneaux isolants (30).
  6. Dispositif de filtrage selon la revendication 5, caractérisé en ce que les anneaux isolants (30) et les couches intermédiaires (31) sont raccordés entre eux au moyen de vis longitudinales (33), le diamètre des alésages (34) ménagés dans les couches intermédiaires (31) étant quelque peu inférieur au diamètre des vis longitudinales (33).
  7. Dispositif de filtrage selon l'une des revendications qui précèdent, caractérisé en ce que les électrodes d'émission (10) sont fabriquées dans une tôle d'acier dentelée à très fine paroi, et en ce que les dents (32) disposées les unes à la suite des autres dans la direction de l'écoulement sont décalées pour laisser paraítre des vides.
  8. Dispositif de filtrage selon l'une des revendications qui précèdent, caractérisé en ce qu'un filtre suivant (6) est prévu à la suite du séparateur électrostatique (4) en vue d'une épuration ultérieure.
  9. Dispositif de filtrage selon l'une des revendications qui précèdent, caractérisé en ce que les électrodes d'émission (10) sont fabriquées dans une tôle d'acier dentelée à très fine paroi, et en ce que les dents (32) disposées les unes à la suite des autres dans la direction de l'écoulement sont décalées pour laisser paraítre des vides.
  10. Dispositif de filtrage selon l'une des revendications qui précèdent, caractérisé en ce qu'un filtre suivant (6) est prévu à la suite du séparateur électrostatique (4) en vue d'une épuration ultérieure.
EP95116832A 1994-12-10 1995-10-26 Installation de filtrage électrostatique Expired - Lifetime EP0715894B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9419827U 1994-12-10
DE9419827U DE9419827U1 (de) 1994-12-10 1994-12-10 Elektrostatische Filtereinrichtung

Publications (2)

Publication Number Publication Date
EP0715894A1 EP0715894A1 (fr) 1996-06-12
EP0715894B1 true EP0715894B1 (fr) 1999-06-09

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EP95116832A Expired - Lifetime EP0715894B1 (fr) 1994-12-10 1995-10-26 Installation de filtrage électrostatique

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EP (1) EP0715894B1 (fr)
AT (1) ATE180992T1 (fr)
DE (2) DE9419827U1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9419827U1 (de) * 1994-12-10 1995-03-02 Hertfelder Rolf Elektrostatische Filtereinrichtung
DE19741621C1 (de) * 1997-09-20 1999-06-10 Wilhelm Hertfelder Luftreinigungseinrichtung
AU3424099A (en) * 1999-04-19 2000-11-02 Fortum Service Oy Arrangement and method for purification of flowing gas
CH699458A1 (de) * 2008-09-10 2010-03-15 Ompeg Gmbh Vorrichtung zur Ionisierung von Gasen und Partikeln.
CN107684976A (zh) * 2016-08-05 2018-02-13 刘景文 空气静电清净机
CN107270343A (zh) * 2017-06-28 2017-10-20 佛山市科思博科技有限公司 自动清洗空气动力静电净化一体机
CN109827216A (zh) * 2019-03-08 2019-05-31 珠海格力电器股份有限公司 静电磁偏转滤网组件及具有其的油烟机
TWI678233B (zh) * 2019-03-29 2019-12-01 劉景文 靜電集塵清淨機之組合結構

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2134165C3 (de) * 1971-07-09 1981-06-04 Elba-Werk Maschinen-Gesellschaft Mbh & Co, 7505 Ettlingen Naßelektroabscheider
US3763632A (en) * 1971-07-22 1973-10-09 Resource Control Discharge electrode for an electrostatic precipitator
DE3515508C1 (de) * 1985-04-30 1986-10-30 Karl 7031 Steinenbronn Grob Gerät zur Reinigung der Luft in Wohn- und Aufenthaltsräumen insbesondere von Küchen
DE3930872A1 (de) 1989-09-15 1991-03-28 Rolf Hertfelder Elektrostatische filtereinrichtung
DE9419827U1 (de) * 1994-12-10 1995-03-02 Hertfelder Rolf Elektrostatische Filtereinrichtung

Also Published As

Publication number Publication date
DE59506156D1 (de) 1999-07-15
ATE180992T1 (de) 1999-06-15
DE9419827U1 (de) 1995-03-02
EP0715894A1 (fr) 1996-06-12

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