EP0255985B1 - Elektroabscheider zum Filtern von Luft - Google Patents

Elektroabscheider zum Filtern von Luft Download PDF

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Publication number
EP0255985B1
EP0255985B1 EP87710009A EP87710009A EP0255985B1 EP 0255985 B1 EP0255985 B1 EP 0255985B1 EP 87710009 A EP87710009 A EP 87710009A EP 87710009 A EP87710009 A EP 87710009A EP 0255985 B1 EP0255985 B1 EP 0255985B1
Authority
EP
European Patent Office
Prior art keywords
air
filter
electrode
activated carbon
flaps
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
EP87710009A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0255985A3 (en
EP0255985A2 (de
Inventor
Gottfried Müller
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.)
Schako KG
Original Assignee
Schako Metallwarenfabrik Ferdinand Schad KG
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 Schako Metallwarenfabrik Ferdinand Schad KG filed Critical Schako Metallwarenfabrik Ferdinand Schad KG
Priority to AT87710009T priority Critical patent/ATE73016T1/de
Publication of EP0255985A2 publication Critical patent/EP0255985A2/de
Publication of EP0255985A3 publication Critical patent/EP0255985A3/de
Application granted granted Critical
Publication of EP0255985B1 publication Critical patent/EP0255985B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/04—Plant or installations having external electricity supply dry type
    • B03C3/14—Plant or installations having external electricity supply dry type characterised by the additional use of mechanical effects, e.g. gravity
    • B03C3/155—Filtration
    • 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
    • B03C3/32—Transportable units, e.g. for cleaning room air

Definitions

  • the invention relates to a device for filtering a gaseous medium, in particular air in a room, optionally with at least one fan, an electrical separator arrangement having two electrodes concentrically surrounding one another.
  • exhaust air filters are known which are used, for example, in kitchens, in which food vapors are sucked off and filtered in a filter mat.
  • the filtered vapors can either be returned to the outside as exhaust air or returned to the room as recirculating air.
  • these filters in particular filter grease and soot particles from the air, they do not work satisfactorily, especially in recirculation mode, since the smells remain in the room.
  • processing the air is desirable, especially if the room air still has more than sufficient oxygen content, but is still contaminated with vapors, odors or floating particles. Since many buildings are located in locations that are polluted with immissions, be it from road traffic or the like, it is often desirable to largely treat fresh air that is supplied.
  • a device for filtering gaseous medium with a fan which has an electro-separator arrangement with concentrically surrounding grid-like electrodes, between which a filter made of tissue material is arranged, on the axis of the two aforementioned grid electrodes.
  • AT-B-372 300 also shows an electrostatic filter in which a central cross-shaped electrode is surrounded by an activated carbon filter which is arranged between two concentric cages made of perforated sheet metal.
  • the object of the invention is therefore to create an inexpensive, compact and effective device for filtering air, which is easy to manufacture in terms of production technology and which is used both for indoor air and for fresh air filtering can be.
  • the stated object is solved by claim 1, the preamble of which corresponds to FR-A-2 390 209.
  • a generic device according to the invention is provided with a high-voltage electrode for the electrostatic filter which is simple, highly effective and effective in terms of production technology.
  • the electrode arrangement is such that the inner electrode has a closed cross-sectional contour.
  • the cross section of the electrodes can be square or polygonal and is preferably circular or ring-shaped.
  • a preferred embodiment provides that at least one filter arrangement is provided, in which a cylindrical electrostatic filter from a central tube electrode is concentrically surrounded by an activated carbon filter.
  • the features according to the invention create a compact, highly effective filter arrangement with which different immissions and loads of the ambient air, such as small and coarse floating particles, metallic particles, vapors, etc., can be filtered out of the air and this can be processed by ozonization.
  • the activated carbon filter has a cylindrical jacket-shaped vessel which consists of two concentrically surrounding grids, between which the activated carbon is located and whose inner grid is the counter electrode for the electrostatic precipitator.
  • the tabs preferably enclose an angle not equal to 90 degrees to the tangent to the lateral surface of the tubular electrode, the tabs also being able to include an angle of approximately 50 to 70 degrees to the tangent to the lateral surface.
  • a tubular electrode with a diameter of approximately 5 cm and thus with a circumference of approximately 15 cm are distributed approximately over the circumference, 26 tabs each with an axial height of approximately 4 cm and a radial extension of approximately 4 to 5 mm , wherein several rows of such tabs can be arranged one above the other in the axial direction.
  • the webs remaining in the lateral surface have a width of approximately 1 to 2 mm. In an optimal configuration it is therefore provided that the density of the high field straps over the circumference is in the order of 1.5 to 2 per centimeter.
  • the radius of the inner electrode is approximately 5 cm and the thickness of the carbon filter is approximately 2 to 2.5 cm.
  • a device according to the invention works in fresh air operation, that is to say is fed into a room via the fresh air
  • a preferred embodiment provides that a heat exchanger is provided in the supply air path of the air to be filtered, it also being possible for a line for the exhaust air from a room for fresh air is surrounded.
  • An extremely preferred embodiment is designed in such a way that a valve device is provided for setting the supply lines of room air and / or fresh air to the filter arrangements, this being achieved structurally in particular in that the valve device has a T-pipe with two supply air connections, in which valve flaps are arranged, while the third connection is connected to a space leading to the filter arrangement.
  • a device designed in this way can operate in recirculation mode if the room air is not yet very polluted, so that the valve flap for the fresh air supply is closed and the valve flap for the room air is fully open. Room air is then filtered so that no energy is required to heat incoming fresh air in any operating mode.
  • the device according to the invention can be provided with an oxygen / CO-2 sensor, so that when the CO-2 content is exceeded or a predetermined oxygen content is undershot, the device is switched to mixed or fresh air operation by control electronics by completely or partially closing the valve in the room air inlet and the valve in the fresh air inlet being fully or partially opened becomes. It has been shown that a device according to the invention can work with circulating air over 80 to 95% of the time, while a fresh air supply is required for the remaining time. In particular, the above design and method of operation make sense if there is an increased air pollution with dust particles or vapors only over a short period of time, as is the case, for example, during cooking times in apartments.
  • the filter device 1 is a compact device in a housing 2, which can optionally be arranged on rollers.
  • the device initially has in an upper cover 3 an inlet 4 for used room air, to which a fan 6 for extracting the room air and a pipe 7, which is still used for heat exchange in a manner to be explained, follows.
  • the Tube 7 can be suitably provided with inner and / or outer fins or the like for heat exchange.
  • a pipe 8 connects to the pipe 7 and leads to an outlet 9. Corresponding pipes or hoses can be attached to the inlet 4 and the outlet 9.
  • a pipe protruding high into the room can be attached to the inlet 4 so that the used air, which preferably collects in the upper area of a room, is sucked out, while a hose leading to the outside can be arranged at the outlet 9.
  • a further inlet 12 is provided on a side wall 11, which leads through a space 13 surrounding the tube 7 to a second fan 14.
  • the second fan 14 conveys air into the pre-filter chamber 19 via the inlet 12, which may heat up in the pipe 13, possibly in heat exchange with the air passed through the pipe 7.
  • a pipe or hose leading to the outside can be connected, so as to suck in fresh air.
  • room air can be sucked in directly through the inlet 12, or a tube can be connected, which also extends into the upper areas of the room whose room air is to be treated, in order to suck in fresh air from the upper layers.
  • no room air is usually sucked in through the inlet 4, the fan 6 of which is therefore shut down.
  • it is also fundamentally possible, for example in the case of different temperature stratifications in a room to convey air through the pipe 7 for heat exchange in order to achieve a more uniform temperature distribution.
  • Each filter arrangement 21 initially has a cylindrical-shell-shaped carbon filter 22, which consists of two grids 23, 24, which are arranged at a distance from one another and concentrically surrounding one another, in which activated carbon 26 is filled.
  • the filter arrangement 21 is provided on its underside with a cover plate 27.
  • Cover plates 28 are also provided on the upper side, but they have a central opening 29. With this configuration, it is first achieved that the air located in the pre-filter space 16 has to flow through the activated carbon filter 22.
  • the main electrode is concentric within the activated carbon filter 22 33 of an electrodilter formed by this and the inner grid 24 as a counter electrode.
  • the electrode 31 consists of a cylindrical tubular electrode 33 which projects with its upper end 34 through the opening 29 in the upper cover 28 of the filter space 16.
  • the tube electrode 33 is designed such that along the longitudinal direction of its jacket three rows of cut from the jacket surface of the tube electrode 33 on three sides or punched and 36 from the jacket surface bent tabs 37 is provided.
  • the tabs 37 have their main direction of extension parallel to the axis and are oriented at an angle of approximately 60 degrees to the tangent to the cylinder jacket 36 on the grid.
  • effective areas of high field strength are easily achieved after connecting the high voltage to the tubular electrode 33.
  • the outlets of the tubular electrodes 33 are covered in their upper region 34 by fabric filter mats 41.
  • the device according to the invention offers effective and effective filtering of a wide variety of immissions, such as small and large particles, in particular also metallic particles, different smells and exhalations, and also ensures an improvement in the air by portioning.
  • FIGS. 4 and 5 The design of FIGS. 4 and 5 is fundamentally similar to that of FIGS. 1 and 2. Only no heat exchange is provided here. Instead, a T-pipe 51 is attached to the inlet 12 'for the fan 14, the two branches 52 and 53 are provided with valve flaps 54, 56, so that fresh air or room air can be supplied through the two branches 52, 53.
  • the fed to the device Air between the pure supply of fresh air via a mixture of fresh air and room air to the pure supply of room air can be regulated by the valves 54, 56, the device operating as a recirculation device in the latter.
  • there is a post-filter space 56 above the filter mat 41 which is closed except for a pipe connection piece 57, so that with the design of FIGS. 4 and 5 of the device, the filtered air via hoses or pipes to a desired location away from the device 1 itself passed and entered into the room there.

Landscapes

  • Filtering Of Dispersed Particles In Gases (AREA)
  • Electrostatic Separation (AREA)
  • Filtering Materials (AREA)
  • Elimination Of Static Electricity (AREA)
EP87710009A 1986-07-05 1987-07-06 Elektroabscheider zum Filtern von Luft Expired - Lifetime EP0255985B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87710009T ATE73016T1 (de) 1986-07-05 1987-07-06 Elektroabscheider zum filtern von luft.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863622673 DE3622673A1 (de) 1986-07-05 1986-07-05 Vorrichtung zum filtern von luft
DE3622673 1986-07-05

Publications (3)

Publication Number Publication Date
EP0255985A2 EP0255985A2 (de) 1988-02-17
EP0255985A3 EP0255985A3 (en) 1989-10-04
EP0255985B1 true EP0255985B1 (de) 1992-03-04

Family

ID=6304505

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87710009A Expired - Lifetime EP0255985B1 (de) 1986-07-05 1987-07-06 Elektroabscheider zum Filtern von Luft

Country Status (5)

Country Link
EP (1) EP0255985B1 (enrdf_load_stackoverflow)
AT (1) ATE73016T1 (enrdf_load_stackoverflow)
DE (2) DE3622673A1 (enrdf_load_stackoverflow)
DK (1) DK345487D0 (enrdf_load_stackoverflow)
ES (1) ES2030442T3 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4218900A1 (de) * 1992-06-09 1993-12-16 Fritz Egger Gmbh Elektroabscheideranordnung
DE19837727A1 (de) * 1998-08-20 2000-02-24 Baltic Metalltechnik Gmbh Luftreinigungsgerät
US7341616B2 (en) * 2005-02-04 2008-03-11 General Electric Company Apparatus and method for the removal of particulate matter in a filtration system

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA821315A (en) * 1969-08-26 I. Inculet Ion Two-stage electrostatic precipitator
DE344705C (de) * 1914-05-23 1921-11-28 Metallbank Verfahren und Einrichtung zur elektrischen Aufladung und Niederschlagung von schwebenden Teilchen aus Gasen oder Fluessigkeiten
US2064960A (en) * 1932-03-05 1936-12-22 Estelle T Thorne Method of and apparatus for cleaning gases
GB538294A (en) * 1940-04-10 1941-07-28 Lodge Cottrell Ltd Apparatus for the electrical precipitation of suspended particles from gaseous fluids
FR877722A (fr) * 1940-12-23 1942-12-15 Siemens Lurgi Cottrell Elektro Dépoussiéreur électrique pour véhicules automobiles
US2505907A (en) * 1946-10-31 1950-05-02 Research Corp Discharge electrode
FR1029116A (fr) * 1950-12-05 1953-05-29 Filtre électrostatique
DE1239277B (de) * 1962-04-21 1967-04-27 Metallgesellschaft Ag Verfahren zur Abscheidung von Nebeln und Feststoffen aus Gasen mittels Roehren-Nassentstaubern
DE1557148A1 (de) * 1966-10-28 1970-05-27 Metallgesellschaft Ag Plattenfoermige Spruehelektrode fuer elektrostatische Staubabscheider
DE2539311A1 (de) * 1975-09-04 1977-03-10 American Precision Ind Staubabscheider und dessen verwendung
CH629684A5 (de) * 1977-05-12 1982-05-14 Manfred R Burger Verfahren und elektrostatische filtervorrichtung zur reinigung von gasen.
DE3415984A1 (de) * 1984-04-28 1985-11-07 Hugo Petersen Gesellschaft für verfahrenstechnischen Anlagenbau mbH & Co KG, 6200 Wiesbaden Elektrofilter

Also Published As

Publication number Publication date
DE3622673C2 (enrdf_load_stackoverflow) 1990-01-04
ATE73016T1 (de) 1992-03-15
EP0255985A3 (en) 1989-10-04
DE3777007D1 (de) 1992-04-09
EP0255985A2 (de) 1988-02-17
DK345487D0 (da) 1987-07-06
DE3622673A1 (de) 1988-01-14
ES2030442T3 (es) 1992-11-01

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