EP0715894A1 - Electrostatic filter unit - Google Patents

Electrostatic filter unit Download PDF

Info

Publication number
EP0715894A1
EP0715894A1 EP95116832A EP95116832A EP0715894A1 EP 0715894 A1 EP0715894 A1 EP 0715894A1 EP 95116832 A EP95116832 A EP 95116832A EP 95116832 A EP95116832 A EP 95116832A EP 0715894 A1 EP0715894 A1 EP 0715894A1
Authority
EP
European Patent Office
Prior art keywords
filter device
separator
tubes
gas ionizer
gas
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.)
Granted
Application number
EP95116832A
Other languages
German (de)
French (fr)
Other versions
EP0715894B1 (en
Inventor
Rolf Hertfelder
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0715894A1 publication Critical patent/EP0715894A1/en
Application granted granted Critical
Publication of EP0715894B1 publication Critical patent/EP0715894B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B03C3/66—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 with two or more serrated ends or sides

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 therein are deposited in a separator connected to the gas ionizer on electrostatically charged separation surfaces.
  • the electrostatic precipitator is formed by several concentrically arranged flexible metal hoses.
  • the gas ionizer connected upstream of the electrostatic precipitator has a cylindrical insulating body, on which spray electrodes are attached in the form of a helically arranged serrated strip.
  • the invention is based on the object of realizing a concentrically constructed electrostatic filter device with the most compact possible structure.
  • the insulation body which is designed as a tube, has spray electrodes on its cylindrical outer wall and on its cylindrical inner wall, each of which is at a distance from cylindrical counter-electrodes. It thus becomes one with respect to the insulation body outer and an inner annulus for ionizing the gas flowing through it.
  • the ionizer can have a significantly shorter design than the conventional design, with the same effectiveness.
  • the electronics can be accommodated inside the ionizer, which is optimally shielded by the inner, cylindrical counterelectrode.
  • the metallic tubes of the separator are held in the end area in the filter device, which is remote from the gas ionizer.
  • the opening edges of the tubes of the separator, which face the gas ionizer and directly adjoin the gas ionizer, are free from disturbing insulation elements.
  • the separator can thus act optimally on the ionized gas stream flowing into it.
  • the insulation elements attached parallel to the gas flow in the rear area thus only come into contact with the gas stream which has already been cleaned, as a result of which electrical interference due to contamination or due to moisture in the area of the insulation elements can be reliably avoided.
  • the electrostatic precipitator preferably consists of several concentrically arranged metallic tubes, which are alternately connected to ground or to a negative high-voltage potential.
  • the outer tube is at ground potential and at the same time forms the counter electrode for the gas ionizer.
  • the inner tube is at ground potential and forms an ideal Faraday shielded housing for receiving the control electronics.
  • the insulating body carrying the spray electrodes can consist of a one-piece cylinder or of a series of insulating rings, between each of which spray electrodes in the form of annular disks Intermediate layers are arranged.
  • This structure can be referred to as a sandwich structure, which has the great advantage that insulation bodies with spray electrodes of different lengths can be constructed by simply plugging them together, depending on the respective requirements.
  • the intermediate layers are advantageously connected to one another by means of longitudinal screws, the diameter of the holes in the intermediate layers being kept somewhat smaller than the diameter of the longitudinal screws. This results in an electrically conductive press fit via which the voltage connection of the individual washers takes place.
  • the spray electrodes are preferably made of serrated, very thin-walled metal sheet, which is why one can also speak of a metal foil here.
  • the spikes of spray electrodes lying one behind the other are offset to a gap, so that there is an optimal distribution of the spray electrodes in the entire air flow.
  • the gas ionizer and the electrostatic separator are expediently followed by a post-filter, which can be designed, for example, as an activated carbon filter or ozone catalyst.
  • the extractor hood 1 shown in Figure 1 contains an electrostatic filter device 2, which is somewhat simplified here and partially shown in section.
  • the filter device 2 consists of a gas ionizer 3 in the lower region and an electrostatic separator 4 connected downstream of it in the central region. At the top, the filter device has a fan 5 and a filter cartridge 6 as a post-filter. The direction of flow for the gas stream to be cleaned is indicated by the directional arrow 7.
  • the gas ionizer 3 consists of a tubular insulation body 8, which has 9 spray electrodes 10 on its cylindrical outer side and its cylindrical inner wall. Cylindrical counter electrodes 11, 12, which are at ground potential, are arranged opposite the spray electrodes 10. The spray electrodes 10, however, are at a negative high voltage potential, so that the gas stream flowing through is ionized in the two annular spaces 13, 14.
  • the ionized gas stream After leaving the annular spaces 13, 14, the ionized gas stream enters the electrostatic separator 4, which consists of five concentrically arranged tubes 15 to 19.
  • the opening edges 20, 21 of the tubes 16, 17 facing the gas ionizer 3 project freely into the gas flow. Mounts or fastening elements that could disrupt the gas flow are completely avoided in the transition area between gas ionizer 3 and separator 4.
  • Required insulation elements 22, 23 are located at the upper end of the tubes 18, 21, where the gas stream which has already been cleaned Separator leaves again. All tubes 15 to 19 are fastened in the end area 24 of their openings facing away from the gas ionizer 3 in the filter device.
  • the gas ionizer 3 can preferably be conductively connected directly to one or more of the live tubes 16, 18.
  • the filter device 2 consisting of gas ionizer 3 and the downstream separator 4, can thus be operated from one and the same high-voltage source and the same operating voltage resulting therefrom. Annular spaces 25 between the electrodes formed by the tubes 15 to 19 of the separator 4 are thus free of insulation elements.
  • the tubes 19 and the tubular counterelectrode 12 form a Faraday cage for the electronics 26, which are indicated here with a broken line, and are located on the inside.
  • this has a protective cap 27 and a protective ring 28, which prevent condensation in the gas ionizer.
  • FIG. 3 shows the structure of an insulating body 8 composed of insulating rings 30. Between the insulating rings 30, annular disk-shaped spray electrodes 31 are used, which have a toothed edge 32. The insulating body 8 is held together by means of the longitudinal screws 32. The diameter of the bores 34 in the intermediate layers 31 is kept somewhat smaller than the diameter of the longitudinal screws 33 in order to effect the voltage contacting by means of an electrically conductive press fit.
  • the fan 5 can have different designs, depending on the application For example, tangential or axial fans can be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrostatic Separation (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Centrifugal Separators (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

An electrostatic filter unit consists of a gas ioniser which has a spray electrode fitted to the outside of a rotationally symmetric insulation member, and a cylindrical outer opposing electrode. An electrostatic precipitator is attached to the sensor, and consists of concentric metal tubes which are insulated w.r.t. each other, with a high voltage field between them. The insulation member (8) is in the form of tubes and has spray electrodes (10) on its inner wall (9) as well, which are spaced apart from an inner opposing electrode (12).

Description

Die Erfindung betrifft eine elektrostatische Filtereinrichtung gemäß Oberbegriff des Anspruchs 1.The invention relates to an electrostatic filter device according to the preamble of claim 1.

Aus der DE 39 30 872 A1 ist eine elektrostatische Filtereinrichtung zur Reinigung der Abluft im Küchenbereich bekannt. Ein Gasionisator ionisiert die zu reinigende Luft, so daß die darin enthaltenen Schwebeteilchen in einem sich an den Gasionisator anschließenden Abscheider an elektrostatisch geladenen Abscheideflächen ablagern. Der elektrostatische Abscheider wird von mehreren konzentrisch angeordneten flexiblen Metallschläuchen gebildet. Der dem elektrostatischen Abscheider vorgeschaltete Gasionisator besitzt einen zylindrischen Isolierkörper, auf dem Sprühelektroden in Form eines wendelförmig angebrachten Zackenbandes befestigt sind.From DE 39 30 872 A1 an electrostatic filter device for cleaning the exhaust air in the kitchen area is known. A gas ionizer ionizes the air to be cleaned so that the suspended particles contained therein are deposited in a separator connected to the gas ionizer on electrostatically charged separation surfaces. The electrostatic precipitator is formed by several concentrically arranged flexible metal hoses. The gas ionizer connected upstream of the electrostatic precipitator has a cylindrical insulating body, on which spray electrodes are attached in the form of a helically arranged serrated strip.

Der Erfindung liegt die Aufgabe zugrunde, eine konzentrisch aufgebaute elektrostatische Filtereinrichtung mit möglichst kompaktem Aufbau zu realisieren.The invention is based on the object of realizing a concentrically constructed electrostatic filter device with the most compact possible structure.

Die Lösung dieser Aufgabe erhält man durch die im Anspruch 1 angegebenen Merkmale. Der als Röhre ausgebildete Isolationskörper besitzt an seiner zylindrischen Außenwand und an seiner zylindrischen Innenwand Sprühelektroden, die sich jeweils im Abstand von zylindrischen Gegenelektroden befinden. Es wird somit ein bezüglich des Isolationskörpers äußerer und ein innerer Ringraum zur Ionisation des durchströmenden Gases bereitgestellt. Dadurch kann der Ionisator bei gleicher Wirksamkeit gegenüber der herkömmlichen Ausführung eine deutlich kürzere Bauform haben. Im Innern des Ionisators kann die Elektronik untergebracht sein, die durch die innere, zylindrische Gegenelektrode optimal abgeschirmt ist.The solution to this problem is obtained by the features specified in claim 1. The insulation body, which is designed as a tube, has spray electrodes on its cylindrical outer wall and on its cylindrical inner wall, each of which is at a distance from cylindrical counter-electrodes. It thus becomes one with respect to the insulation body outer and an inner annulus for ionizing the gas flowing through it. As a result, the ionizer can have a significantly shorter design than the conventional design, with the same effectiveness. The electronics can be accommodated inside the ionizer, which is optimally shielded by the inner, cylindrical counterelectrode.

Zur Erhöhung der elektrischen Sicherheit und zur Erzielung einer möglichst kompakten Bauform ist weiterhin vorgesehen, daß die metallischen Röhren des Abscheiders in dem Stirnbereich in der Filtereinrichtung gehalten werden, welcher dem Gasionisator abgewandt ist. Die Öffnungsränder der Röhren des Abscheiders, die dem Gasionisator zugewandt sind und unmittelbar sich an den Gasionisator anschließen, sind frei von störenden Isolationselementen. Der Abscheider kann somit optimal auf den in ihn einströmenden ionisierten Gasstrom einwirken. Die im rückwärtigen Bereich parallel zum Gasstrom angebrachten Isolationselemente kommen somit nur mit dem bereits gereinigten Gasstrom in Berührung, wodurch elektrische Störungen aufgrund von Verschmutzungen oder aufgrund von Feuchtigkeit im Bereich der Isolationselemente sicher vermieden werden können.To increase the electrical safety and to achieve the most compact possible design, it is further provided that the metallic tubes of the separator are held in the end area in the filter device, which is remote from the gas ionizer. The opening edges of the tubes of the separator, which face the gas ionizer and directly adjoin the gas ionizer, are free from disturbing insulation elements. The separator can thus act optimally on the ionized gas stream flowing into it. The insulation elements attached parallel to the gas flow in the rear area thus only come into contact with the gas stream which has already been cleaned, as a result of which electrical interference due to contamination or due to moisture in the area of the insulation elements can be reliably avoided.

Der elektrostatische Abscheider besteht vorzugsweise aus mehreren konzentrisch angeordneten metallischen Röhren, die abwechselnd auf Masse bzw. auf einem negativen Hochspannungspotential liegen. Die äußere Röhre befindet sich dabei auf Massepotential und bildet gleichzeitig die Gegenelektrode für den Gasionisator. Ebenso liegt die innere Röhre auf Massepotential und bildet ein ideales faradayisch abgeschirmtes Gehäuse zur Aufnahme der Steuerelektronik.The electrostatic precipitator preferably consists of several concentrically arranged metallic tubes, which are alternately connected to ground or to a negative high-voltage potential. The outer tube is at ground potential and at the same time forms the counter electrode for the gas ionizer. Likewise, the inner tube is at ground potential and forms an ideal Faraday shielded housing for receiving the control electronics.

Der die Sprühelektroden tragende Isolationskörper kann aus einem einstückigen Zylinder oder aus einer Reihe von Isolierringen bestehen, zwischen denen jeweils Sprühelektroden in Form von ringscheibenförmigen Zwischenlagen angeordnet sind. Dieser Aufbau kann als Sandwich-Aufbau bezeichnet werden, der den großen Vorteil hat, daß den jeweiligen Anforderungen entsprechend unterschiedlich lange Isolationskörper mit Sprühelektroden durch einfaches Aufeinanderstecken aufgebaut werden können. Vorteilhafterweise werden dabei die Zwischenlagen mittels Längsschrauben miteinander verbunden, wobei der Durchmesser der Bohrungen der Zwischenlagen etwas kleiner gehalten ist, als der Durchmesser der Längsschrauben. Dadurch ergibt sich eine elektrisch leitende Preßpassung über die die Spannungskontaktierung der einzelnen Zwischenscheiben erfolgt.The insulating body carrying the spray electrodes can consist of a one-piece cylinder or of a series of insulating rings, between each of which spray electrodes in the form of annular disks Intermediate layers are arranged. This structure can be referred to as a sandwich structure, which has the great advantage that insulation bodies with spray electrodes of different lengths can be constructed by simply plugging them together, depending on the respective requirements. The intermediate layers are advantageously connected to one another by means of longitudinal screws, the diameter of the holes in the intermediate layers being kept somewhat smaller than the diameter of the longitudinal screws. This results in an electrically conductive press fit via which the voltage connection of the individual washers takes place.

Die Sprühelektroden bestehen vorzugsweise aus gezacktem, sehr dünnwandigen Metallblech, weshalb man hier auch von einer Metallfolie sprechen kann. In Strömungsrichtung sind die Zacken von hintereinander liegenden Sprühelektroden auf Lücke versetzt, so daß eine optimale Verteilung der Sprühelektroden im gesamten Luftstrom gegeben ist.The spray electrodes are preferably made of serrated, very thin-walled metal sheet, which is why one can also speak of a metal foil here. In the direction of flow, the spikes of spray electrodes lying one behind the other are offset to a gap, so that there is an optimal distribution of the spray electrodes in the entire air flow.

Zur abschließenden Ozon- und Geruchsreduzierung des zu reinigenden Gasstromes ist zweckmäßigerweise dem Gasionisator und dem elektrostatischen Abscheider ein Nachfilter nachgeschaltet, das beispielsweise als Aktivkohlefilter oder Ozonkatalysator ausgebildet sein kann.For the final ozone and odor reduction of the gas stream to be cleaned, the gas ionizer and the electrostatic separator are expediently followed by a post-filter, which can be designed, for example, as an activated carbon filter or ozone catalyst.

Die Erfindung wird nachfolgend anhand von in der Zeichnung dargestellten Ausführungsbeispielen näher erläutert.The invention is explained in more detail below with reference to exemplary embodiments shown in the drawing.

Es zeigen:

Figur 1
eine in eine Dunstabzugshaube eingesetzte elektrostatische Filtereinrichtung,
Figur 2
den Längsschnitt der elektrostatischen Filtereinrichtung und
Figur 3
eine elektrostatische Filtereinrichtung mit einem aus mehreren Isolierringen aufgebauten Isolationskörper mit Sprühelektroden.
Show it:
Figure 1
an electrostatic filter device inserted in an extractor hood,
Figure 2
the longitudinal section of the electrostatic filter device and
Figure 3
an electrostatic filter device with an insulation body made up of several insulating rings with spray electrodes.

Die in Figur 1 dargestellte Dunstabzugshaube 1 enthält eine elektrostatische Filtereinrichtung 2, die hier etwas vereinfacht und teilweise im Schnitt dargestellt ist.The extractor hood 1 shown in Figure 1 contains an electrostatic filter device 2, which is somewhat simplified here and partially shown in section.

Die Filtereinrichtung 2 besteht aus einem Gasionisator 3 im unteren Bereich und einem ihm nachgeschalteten elektrostatischen Abscheider 4 im mittleren Bereich. Oben besitzt die Filtereinrichtung einen Lüfter 5 und eine Filterpatrone 6 als Nachfilter. Die Strömungsrichtung für den zu reinigenden Gasstrom wird durch den Richtungspfeil 7 angegeben.The filter device 2 consists of a gas ionizer 3 in the lower region and an electrostatic separator 4 connected downstream of it in the central region. At the top, the filter device has a fan 5 and a filter cartridge 6 as a post-filter. The direction of flow for the gas stream to be cleaned is indicated by the directional arrow 7.

Anhand von Figur 2 wird nun die elektrostatische Filtereinrichtung 2 näher erläutert. Der Gasionisator 3 besteht aus einem röhrenförmigen Isolationskörper 8, der an seiner zylindrischen Außenseite und seiner zylindrischen Innenwand 9 Sprühelektroden 10 besitzt. Den Sprühelektroden 10 gegenüberliegend sind zylindrische Gegenelektroden 11, 12 angeordnet, die sich auf Massepotential befinden. Die Sprühelektroden 10 befinden sich dagegen auf einem negativen Hochspannungspotential, so daß in den beiden Ringräumen 13, 14 der durchströmende Gasstrom ionisiert wird.The electrostatic filter device 2 will now be explained in more detail with reference to FIG. The gas ionizer 3 consists of a tubular insulation body 8, which has 9 spray electrodes 10 on its cylindrical outer side and its cylindrical inner wall. Cylindrical counter electrodes 11, 12, which are at ground potential, are arranged opposite the spray electrodes 10. The spray electrodes 10, however, are at a negative high voltage potential, so that the gas stream flowing through is ionized in the two annular spaces 13, 14.

Der ionisierte Gasstrom tritt nach Verlassen der Ringräume 13, 14 in den elektrostatischen Abscheider 4 ein, der aus fünf konzentrisch angeordneten Röhren 15 bis 19 besteht. Die zum Gasionisator 3 weisenden Öffnungsränder 20, 21 der Röhren 16, 17 ragen frei in den Gasstrom. Halterungen oder Befestigungselemente, die den Gasstrom stören könnten, sind in dem Übergangsbereich zwischen Gasionisator 3 und Abscheider 4 vollständig vermieden. Erforderliche Isolationselemente 22, 23 befinden sich am oberen Ende der Röhren 18, 21, wo der bereits gereinigte Gasstrom den Abscheider wieder verläßt. Sämtliche Röhren 15 bis 19 sind im Stirnbereich 24 ihrer dem Gasionisator 3 abgewandten Öffnungen in der Filtereinrichtung befestigt. Der Gasionisator 3 kann vorzugsweise direkt mit einer oder mehreren der spannungsführenden Röhren 16, 18 leitend verbunden sein. Damit kann die Filtereinrichtung 2, bestehend aus Gasionisator 3 und dem nachgeschalteten Abscheider 4 aus ein und derselben Hochspannungsquelle und der damit resultierenden gleichen Betriebsspannung betrieben werden. Ringräume 25 zwischen den von den Röhren 15 bis 19 des Abscheiders 4 gebildeten Elektroden sind somit frei von Isolationselementen. Die Röhre 15, die sowohl die äußere Gegenelektrode für den Gasionisator 3 als auch eine Elektrode für den Abscheider 4 bildet, wirkt gleichzeitig als faradayscher Käfig für die einliegenden Teile. Ebenso bilden die Röhren 19 und die röhrenförmige Gegenelektrode 12 einen faradayschen Käfig für die hier mit unterbrochener Linie angedeutete, im Innern befindliche Elektronik 26.After leaving the annular spaces 13, 14, the ionized gas stream enters the electrostatic separator 4, which consists of five concentrically arranged tubes 15 to 19. The opening edges 20, 21 of the tubes 16, 17 facing the gas ionizer 3 project freely into the gas flow. Mounts or fastening elements that could disrupt the gas flow are completely avoided in the transition area between gas ionizer 3 and separator 4. Required insulation elements 22, 23 are located at the upper end of the tubes 18, 21, where the gas stream which has already been cleaned Separator leaves again. All tubes 15 to 19 are fastened in the end area 24 of their openings facing away from the gas ionizer 3 in the filter device. The gas ionizer 3 can preferably be conductively connected directly to one or more of the live tubes 16, 18. The filter device 2, consisting of gas ionizer 3 and the downstream separator 4, can thus be operated from one and the same high-voltage source and the same operating voltage resulting therefrom. Annular spaces 25 between the electrodes formed by the tubes 15 to 19 of the separator 4 are thus free of insulation elements. The tube 15, which forms both the outer counterelectrode for the gas ionizer 3 and an electrode for the separator 4, also acts as a Faraday cage for the inserted parts. Likewise, the tubes 19 and the tubular counterelectrode 12 form a Faraday cage for the electronics 26, which are indicated here with a broken line, and are located on the inside.

Im vorderen bzw. unteren Bereich der Filtereinrichtung 2 besitzt diese eine Schutzkappe 27 und einen Schutzring 28, die Kondensationsniederschlag im Gasionisator vermeiden.In the front or lower area of the filter device 2, this has a protective cap 27 and a protective ring 28, which prevent condensation in the gas ionizer.

In Figur 3 ist der Aufbau eines aus Isolierringen 30 zusammengesetzen Isolierkörpers 8 dargestellt. Zwischen den Isolierringen 30 sind als Zwischenlagen ringscheibenförmige Sprühelektroden 31 eingesetzt, die einen Zackenrand 32 besitzen. Mittels der Längsschrauben 32 wird der Isolierkörper 8 zusammengehalten. Der Durchmesser der Bohrungen 34 in den Zwischenlagen 31 ist etwas kleiner gehalten als der Durchmesser der Längsschrauben 33, um die Spannungskontaktierung mittels einer elektrisch leitenden Preßpassung zu bewirken.FIG. 3 shows the structure of an insulating body 8 composed of insulating rings 30. Between the insulating rings 30, annular disk-shaped spray electrodes 31 are used, which have a toothed edge 32. The insulating body 8 is held together by means of the longitudinal screws 32. The diameter of the bores 34 in the intermediate layers 31 is kept somewhat smaller than the diameter of the longitudinal screws 33 in order to effect the voltage contacting by means of an electrically conductive press fit.

Es wird noch angemerkt, daß der Lüfter 5 je nach Anwendungsfall unterschiedliche Bauform haben kann, wobei beispielsweise Tangentiallüfter oder Axiallüfter zum Einsatz kommen können.It is also noted that the fan 5 can have different designs, depending on the application For example, tangential or axial fans can be used.

Claims (10)

Elektrostatische Filtereinrichtung mit einem Gasionisator, der an einem rotationssymetrischen Isolationskörper außen befestigte Sprühelektroden und eine zylindrische äußere Gegenelektrode besitzt, und mit einem in Strömungsrichtung der zu reinigenden Gase sich an dem Gasionisator anschließenden elektrostatischen Abscheider, der aus konzentrisch angeordneten, gegeneinander isolierten metallischen Röhren besteht, zwischen denen ein Hochspannungsfeld aufgebaut ist, dadurch gekennzeichnet, daß der Isolationskörper (8) als Röhre ausgebildet ist und auch an seiner zylindrischen Innenwand (9) Sprühelektroden (10) besitzt, die sich im Abstand von einer inneren zylindrischen Gegenelektrode (12) befinden.Electrostatic filter device with a gas ionizer, which has spray electrodes attached to the outside of a rotationally symmetrical insulation body and a cylindrical outer counterelectrode, and with an electrostatic separator which adjoins the gas ionizer in the flow direction of the gases to be cleaned and which consists of concentrically arranged, mutually insulated metallic tubes which a high-voltage field is built up, characterized in that the insulation body (8) is designed as a tube and also has spray electrodes (10) on its cylindrical inner wall (9) which are at a distance from an inner cylindrical counter-electrode (12). Filtereinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die metallischen Röhren (15 bis 19) des Abscheiders (4) im Stirnbereich (24) ihrer dem Gasionisator (3) abgewandten Öffnungen in der Filtereinrichtung (2) befestigt sind.Filter device according to Claim 1, characterized in that the metallic tubes (15 to 19) of the separator (4) are fastened in the filter device (2) in the end region (24) of their openings facing away from the gas ionizer (3). Filtereinrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Ringräume (25) zwischen den von den Röhren (15 bis 19) des Abscheiders (4) gebildeten Elektroden frei von Isolationselementen sind.Filter device according to claim 2, characterized in that the annular spaces (25) between the electrodes formed by the tubes (15 to 19) of the separator (4) are free of insulation elements. Filtereinrichtung nach Anspruch 2, dadurch gekennzeichnet, daß ein Teil der auf elektrischen Potential liegenden Röhren (16, 18) mittels an ihrem dem Gasionisator (3) abgewandten Öffnungsrand abstehenden Isolatoren (24) mit der übrigen Filtereinrichtung (2) verbunden sind.Filter device according to claim 2, characterized in that a part of the tubes (16, 18) which are at electrical potential are attached to the gas ionizer (3) insulators (24) facing away from the opening edge are connected to the remaining filter device (2). Filtereinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die zylindrische äußere Gegenelektrode (11) für den Gasionisator (3) und den sich anschließenden Abscheider (4) eine auf Masse liegende gemeinsame Gehäusewandung in Form eines metallischen Rohres (15) bildet.Filter device according to one of the preceding claims, characterized in that the cylindrical outer counterelectrode (11) for the gas ionizer (3) and the adjoining separator (4) forms a common housing wall in the form of a metallic tube (15) lying on the ground. Filtereinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die zylindrische innere Gegenelektrode (12, 19) für den Gasionisator (3) und den sich anschließenden Abscheider (4) eine auf Masse liegende gemeinsame Gehäusewandung in Form eines metallischen Rohres (19) bildet.Filter device according to one of the preceding claims, characterized in that the cylindrical inner counterelectrode (12, 19) for the gas ionizer (3) and the adjoining separator (4) forms a common housing wall in the form of a metallic tube (19) lying on the ground. Filtereinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Isolationskörper (8) aus einer Reihe von Isolierringen (30) besteht, wobei die nach außen und innen wirksamen Sprühelektroden (10) als ringscheibenförmige Zwischenlagen (31) zwischen den Isolierringen (30) eingesetzt sind.Filter device according to one of the preceding claims, characterized in that the insulating body (8) consists of a series of insulating rings (30), the spray electrodes (10) acting outwards and inwards being used as annular disk-shaped intermediate layers (31) between the insulating rings (30) are. Filtereinrichtung nach Anspruch 7, dadurch gekennzeichnet, daß die Isolierringe (30) und die Zwischenlagen (31) mittels Längsschrauben (33) miteinander verbunden sind, wobei der Durchmesser der Bohrungen (34) in den Zwischenlagen (31) etwas kleiner gehalten ist als der Durchmesser der Längsschrauben (33).Filter device according to claim 7, characterized in that the insulating rings (30) and the intermediate layers (31) are connected to one another by means of longitudinal screws (33), the diameter of the bores (34) in the intermediate layers (31) being kept somewhat smaller than the diameter the longitudinal screws (33). Filtereinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Sprühelektroden (10) aus gezacktem, sehr dünnwandigem Metallblech bestehen und die in Strömungsrichtung hintereinander angeordneten Zacken (32) auf Lücke versetzt sind.Filter device according to one of the preceding claims, characterized in that the spray electrodes (10) consist of serrated, very thin-walled metal sheet and the tines (32) arranged one behind the other in the flow direction are offset. Filtereinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß ein Nachfilter (6) für die Nachreinigung im Anschluß an den elektrostatischen Abscheider (4) vorgesehen ist.Filter device according to one of the preceding claims, characterized in that a post-filter (6) is provided for post-cleaning following the electrostatic separator (4).
EP95116832A 1994-12-10 1995-10-26 Electrostatic filter unit Expired - Lifetime EP0715894B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9419827U DE9419827U1 (en) 1994-12-10 1994-12-10 Electrostatic filter device
DE9419827U 1994-12-10

Publications (2)

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

Family

ID=6917258

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95116832A Expired - Lifetime EP0715894B1 (en) 1994-12-10 1995-10-26 Electrostatic filter unit

Country Status (3)

Country Link
EP (1) EP0715894B1 (en)
AT (1) ATE180992T1 (en)
DE (2) DE9419827U1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000062936A1 (en) * 1999-04-19 2000-10-26 Fortum Service Oy Arrangement and method for purification of flowing gas
CH699458A1 (en) * 2008-09-10 2010-03-15 Ompeg Gmbh Ionization device for ionization of e.g. soot particle, has inner electrode with cylinder that is provided with teeth in outer side, and outer electrode designed in circular shape in inner side and in user defined shape in outer side
CN107684976A (en) * 2016-08-05 2018-02-13 刘景文 Air electrostatic branner
CN109827216A (en) * 2019-03-08 2019-05-31 珠海格力电器股份有限公司 Electrostatic magnetic deflection filter screen assembly and range hood with same
TWI678233B (en) * 2019-03-29 2019-12-01 劉景文 Combined structure of electrostatic dust cleaning machine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9419827U1 (en) * 1994-12-10 1995-03-02 Hertfelder, Rolf, 71134 Aidlingen Electrostatic filter device
DE19741621C1 (en) 1997-09-20 1999-06-10 Wilhelm Hertfelder Air purification device
CN107270343A (en) * 2017-06-28 2017-10-20 佛山市科思博科技有限公司 Automatic scavenging air dynamostatic purification integrated machine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2145512A1 (en) * 1971-07-09 1973-02-23 Elba Werk Maschinen Gmbh & Co Electro-scrubber gas purifier - for furnace gases etc
US3763632A (en) * 1971-07-22 1973-10-09 Resource Control Discharge electrode for an electrostatic precipitator
DE3515508C1 (en) * 1985-04-30 1986-10-30 Karl 7031 Steinenbronn Grob Apparatus for purifying the air in living rooms and activity rooms, in particular kitchens
DE3930872A1 (en) 1989-09-15 1991-03-28 Rolf Hertfelder Room air purifying electrostatic filter - has separator flow ducts as electrically conductive houses, spaced by insulators
DE9419827U1 (en) * 1994-12-10 1995-03-02 Hertfelder, Rolf, 71134 Aidlingen Electrostatic filter device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2145512A1 (en) * 1971-07-09 1973-02-23 Elba Werk Maschinen Gmbh & Co Electro-scrubber gas purifier - for furnace gases etc
US3763632A (en) * 1971-07-22 1973-10-09 Resource Control Discharge electrode for an electrostatic precipitator
DE3515508C1 (en) * 1985-04-30 1986-10-30 Karl 7031 Steinenbronn Grob Apparatus for purifying the air in living rooms and activity rooms, in particular kitchens
DE3930872A1 (en) 1989-09-15 1991-03-28 Rolf Hertfelder Room air purifying electrostatic filter - has separator flow ducts as electrically conductive houses, spaced by insulators
DE9419827U1 (en) * 1994-12-10 1995-03-02 Hertfelder, Rolf, 71134 Aidlingen Electrostatic filter device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000062936A1 (en) * 1999-04-19 2000-10-26 Fortum Service Oy Arrangement and method for purification of flowing gas
CH699458A1 (en) * 2008-09-10 2010-03-15 Ompeg Gmbh Ionization device for ionization of e.g. soot particle, has inner electrode with cylinder that is provided with teeth in outer side, and outer electrode designed in circular shape in inner side and in user defined shape in outer side
CN107684976A (en) * 2016-08-05 2018-02-13 刘景文 Air electrostatic branner
CN109827216A (en) * 2019-03-08 2019-05-31 珠海格力电器股份有限公司 Electrostatic magnetic deflection filter screen assembly and range hood with same
CN109827216B (en) * 2019-03-08 2024-05-24 珠海格力电器股份有限公司 Electrostatic magnetic deflection filter screen assembly and range hood with same
TWI678233B (en) * 2019-03-29 2019-12-01 劉景文 Combined structure of electrostatic dust cleaning machine

Also Published As

Publication number Publication date
DE59506156D1 (en) 1999-07-15
ATE180992T1 (en) 1999-06-15
EP0715894B1 (en) 1999-06-09
DE9419827U1 (en) 1995-03-02

Similar Documents

Publication Publication Date Title
EP2244834B1 (en) Electrostatic precipitator
DD297868A5 (en) CORONA DISCHARGE ARRANGEMENT WITH IMPROVED REMOVAL OF HARMFUL SUBSTANCES CAUSED BY THE CORONATION DISCHARGE
DD257590A5 (en) ARRANGEMENT FOR GENERATING AN ELECTRIC CORONA DISCHARGE IN THE AIR
DD281892A5 (en) DEVICE FOR TRANSPORTING AIR
DD249130A5 (en) A AIR TRANSPORT SYSTEM
DE102005013183A1 (en) Multi-level space-efficient electrostatic collector
EP0216227B1 (en) Assembly of corona discharge electrodes
DE3804779C2 (en)
DE102007020504A1 (en) Electrostatic precipitator for diesel engine electrostatic crankcase ventilation system, has corona discharge electrode comprising axially extending hollow drum that surrounds tube, and charged particles shielded by tube
DE69427586T2 (en) ELECTRONIC CLEANING OF EXHAUST GAS
WO2022069586A1 (en) Electrostatic separator, tube section and system producing particulate matter
DE4400827C1 (en) Process and device for the electrically induced agglomeration of gas-borne particles
CH675895A5 (en)
EP0715894B1 (en) Electrostatic filter unit
DE19701463C1 (en) Electrode arrangement for electrofilter for crankcase vent of motor vehicle IC engine
CH673237A5 (en)
WO2002066167A1 (en) Electrostatic dust separator with integrated filter tubing
AT504902A4 (en) ELECTRIC FILTER FOR A FIRING SYSTEM
EP0147424B1 (en) Gas purification device
EP2284442A2 (en) Electrostatic separator and heating system
EP2820258B1 (en) Device for treating a gas flow flowing radially outwards from a central area
EP1097749A1 (en) Cyclone air filter with electrostatic separator
DE102007028134B3 (en) Electrostatic separator and heating system
DE1757115A1 (en) Electro-aerodynamic failure device
DE1557031B2 (en) ELECTRIC SEPARATOR

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB IT LI NL

17P Request for examination filed

Effective date: 19960731

17Q First examination report despatched

Effective date: 19980216

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB IT LI NL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990609

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19990609

REF Corresponds to:

Ref document number: 180992

Country of ref document: AT

Date of ref document: 19990615

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 59506156

Country of ref document: DE

Date of ref document: 19990715

ITF It: translation for a ep patent filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990909

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19990915

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991031

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991031

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991031

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

BERE Be: lapsed

Owner name: HERTFELDER ROLF

Effective date: 19991031

26N No opposition filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20071026

Year of fee payment: 13

Ref country code: AT

Payment date: 20071011

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20081014

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20081022

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20081026

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20081026

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20091031

Year of fee payment: 15

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20100630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091102

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091026

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59506156

Country of ref document: DE

Effective date: 20110502

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110502