EP2189223A1 - Filtre électrique à nettoyage humide destiné au nettoyage des gaz d'échappement et procédé correspondant - Google Patents

Filtre électrique à nettoyage humide destiné au nettoyage des gaz d'échappement et procédé correspondant Download PDF

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Publication number
EP2189223A1
EP2189223A1 EP08020223A EP08020223A EP2189223A1 EP 2189223 A1 EP2189223 A1 EP 2189223A1 EP 08020223 A EP08020223 A EP 08020223A EP 08020223 A EP08020223 A EP 08020223A EP 2189223 A1 EP2189223 A1 EP 2189223A1
Authority
EP
European Patent Office
Prior art keywords
exhaust gas
filling
particles
cleaning liquid
electrostatic precipitator
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.)
Ceased
Application number
EP08020223A
Other languages
German (de)
English (en)
Inventor
Tobias BÖHM
Hermann Kuhrmann
Julius Rawe
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.)
Westfaelische Hochschule Gelsenkirchen Bocholt R
Original Assignee
Fachhochschule Gelsenkirchen
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 Fachhochschule Gelsenkirchen filed Critical Fachhochschule Gelsenkirchen
Priority to EP08020223A priority Critical patent/EP2189223A1/fr
Priority to US12/998,688 priority patent/US9321056B2/en
Priority to PCT/DE2009/001661 priority patent/WO2010057488A1/fr
Priority to CA2744038A priority patent/CA2744038C/fr
Priority to AU2009317678A priority patent/AU2009317678B2/en
Priority to DE112009003254T priority patent/DE112009003254A5/de
Publication of EP2189223A1 publication Critical patent/EP2189223A1/fr
Ceased 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
    • B03C3/74—Cleaning the electrodes
    • B03C3/78—Cleaning the electrodes by washing
    • 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
    • B03C3/01—Pretreatment of the gases prior to electrostatic precipitation
    • B03C3/014—Addition of water; Heat exchange, e.g. by condensation
    • 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
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/16—Plant or installations having external electricity supply wet type

Definitions

  • the invention relates to a wet-cleaning electrostatic precipitator for exhaust gas purification according to the preamble of claim 1 and a method suitable for this purpose according to the preamble of claim 21.
  • the invention relates to an electrostatic, wet-cleaning electrostatic precipitator for exhaust gas purification and / or heat recovery according to claim 1 and to a method for exhaust gas purification and / or heat recovery by means of a wet scrubbing electrostatic precipitator for any application - especially for the flue gases of biomass furnaces.
  • exhaust gas purification here is understood both the reduction of particulate as well as gas and odor emissions.
  • scrubbers have been used as wet scrubbers for particulate emissions.
  • Their design principle is based on the inertia of the dust particles to be removed in the exhaust stream, which can not follow the flow of spray droplets in the spray field of the exhaust gas flow, impact the droplets and be deposited with them. This justifies that wet scrubbers only cause the deposition of coarser dust particles up to about 0.5 ⁇ m. Smaller dust particles can no longer be effectively separated due to the low mass inertia of the dust particles, since they follow the gaseous fluid flow and thus are not subject to any interactions with the liquid droplets produced in the scrubber.
  • dry electrostatic precipitators are able to deposit even the finest dust particles smaller than 100 nm with up to 99% effectiveness.
  • the deposition principle is based on a corona-tip discharge and the subsequent particle charging, so that the negatively charged particles can be deposited on a grounded precipitation electrode.
  • Typical designs are tube or plate electrostatic precipitator z. B. in power plants.
  • dry electrostatic working separator have some disadvantages. These are on the one hand design and size. However, they must be mechanically cleaned, which either has an interruption in the operation of the separator and thus possibly an entire system according to or simultaneously causes emissions of the fluidized dust particles deposited during cleaning. Unlike wet scrubbers, they can not recover energy from the flue gases. Likewise, flashovers from the high voltage electrode can cause ignition and explosions of the flue gas. Other disadvantages are frequent cleaning intervals and, in particular for smaller systems, the need for partial manual cleaning by the operator or the chimney sweep.
  • wet electrostatic precipitators are known. The mechanical cleaning is eliminated. Instead, it is done by spraying the collecting electrode with water.
  • wet electrostatic precipitators have disadvantages in terms of design and size and are technically complex, resulting in high costs. Also, a condensation of pollutants contained in the exhaust gas, which adjusts an accumulation of the pollutants in the circulating water, otherwise there is a high water demand.
  • a wet scrubber developed by the Japanese company Mitsubishi called MDDS Mitsubishi Di-Electric Droplet Scrubber
  • MDDS Mitsubishi Di-Electric Droplet Scrubber
  • the particulate-laden exhaust gas is pre-charged before entering the actual deposition chamber and passed through a scrubber field. It then passes through a chamber similar to a plate capacitor, with one side of the chamber at high voltage, the other at ground / ground potential. As a result, a homogeneous electric field is generated between the plates, whereby the water molecules (dipoles) align.
  • fabric filters are also known.
  • the surface metal, textile, cellulose
  • the cleaning is done mechanically or pneumatically.
  • Fabric filters require a lot of space, the cleaning releases dust, furthermore results in a very high pressure loss, therefore a high additional fan power is necessary to remove the exhaust gases.
  • a separation of the dust particles is also solved by cyclones.
  • the coarser dust is separated by the inertia of the dust particles, however, no particulate matter separation takes place and a higher blower output is required.
  • Object of the present invention is therefore to reduce the dust emissions of exhaust gases of any kind and in particular of solid fuel firing, while ensuring a long-term stable operation of the corresponding system.
  • the invention relates to a generic electrostatic precipitator for exhaust gas purification and / or heat recovery, in particular also for exhaust gas purification for the exhaust gases of biomass furnaces, in which the electrostatic precipitator has a separation chamber through which the exhaust gas is passed, wherein in the region of the deposition chamber or adjacent to the deposition chamber is arranged a charging device for the electrostatic charging of particles located in the exhaust gas.
  • Such an electrostatic precipitator is developed further by arranging in the region of the deposition chamber an electrostatically charged or grounded separating device having a surface which is large in relation to its volume for interaction with the particles which flow through the particles charged electrostatically by the charging device, wherein a cleaning liquid dispenser sprays the region of the separator at least periodically, and the cleaning liquid cleans the particles deposited on the surface of the separator.
  • a cleaning liquid dispenser sprays the region of the separator at least periodically, and the cleaning liquid cleans the particles deposited on the surface of the separator.
  • the electrostatic precipitator according to the invention can be used for the purification of any gas streams that carry small particles of any kind, which may be disadvantageous for the further processing of the gas stream or the discharge of the gas stream into the environment. To simplify matters, this always refers to exhaust gas and particles, if such a gas stream or corresponding particles are meant, whereby exhaust gas not only circumscribes the exhaust gas of a combustion process or the like.
  • the electrostatic precipitator electrically charges the particles in the exhaust gas by means of corona discharge. Advantages of the electrostatic precipitator according to the invention here are in particular a simple structure and a compact design, a low power consumption and a low consumption of cleaning fluid with high cleaning performance. Likewise, owing to the low flow resistance, it is possible to achieve a high volumetric flow rate with simultaneously high particulate matter precipitation.
  • the separation device has a filling of electrostatically chargeable components, between which the exhaust gas can pass through and can deliver its previously electrostatically charged particles.
  • a charge of electrostatically chargeable components particularly with a large volume-to-volume interaction surface with the particles, allows for a high degree of particulate matter separation by the repeated interaction of each particle with the large surface area as the charge passes through each Particles often enough opportunity to attach to this surface.
  • a particularly large surface of the filling can be achieved if the filling is formed from a heap of geometrically indeterminate shaped individual components of the filling. Such a heap of geometrically indeterminate shaped individual components usually forms a large surface in itself.
  • the filling can be configured in that the filling has metallic chips, in particular turnings or the like, or metallic wool or the like.
  • metallic chips such as cuttings, shavings or the like usually have a very irregularly shaped geometry and can be compactly stored in the filling only while keeping appropriate channels and open areas.
  • these metallic chips or metallic wools are inherently electrically conductive, so that an electric potential applied from the outside to the filling inevitably spreads over the entire filling.
  • metallic chips or metallic wool are very inexpensive to obtain, since this is usually waste products such as from the production areas of metal workshops or the like, and these materials incurred there in large quantities.
  • the filling according to the invention can be produced very inexpensively and thus the operation of the electrostatic precipitator is less expensive.
  • electrostatically chargeable parts preferably from electrostatically chargeable plastic bodies or the like.
  • electrostatically chargeable parts may be shaped irregularly, for example, in their geometry and thus attach to each other only while keeping appropriate channels in the filling, at the same time made about plastic and made electrically conductive parts can be made very inexpensively.
  • the filling of metallic and / or electrostatically chargeable plates or bodies is formed geometrically determined shape.
  • Such electrostatically chargeable plates or body geometrically determined form are arranged in a likewise geometrically determined arrangement to each other within the separator, in a further embodiment, the plates or bodies are arranged in the separator so that they form between them a plurality of channels for the passage of the exhaust gas in which the electrostatically charged particles of the exhaust gas can attach to the counter-electrostatically charged plates or bodies.
  • the cleaning of such plates or body geometric shape by the cleaning liquid is also particularly easy, since the cleaning liquid can easily move through the geometric arrangement of the plates or body.
  • the filling and / or the separating device is independent of the rest of the electrostatic filter, such as when the filling and / or the separating device in the form of a replaceable in its entirety unit, preferably a cartridge or the like.
  • the filling can be either completely renewed or simply perform a cleaning, without the filling from the separator must be removed gradually and also gradually reintroduced accordingly.
  • the change or the cleaning of the filling can be significantly accelerated.
  • the filling fills the entire passage cross section of the deposition chamber and the entire exhaust gas flows through the filling.
  • a flow around the filling without purification of the exhaust gas flow is reliably excluded from the particles and the quality of the cleaning of the exhaust gas flow overall guaranteed.
  • the charging device is arranged in the flow direction in front of the deposition chamber or in the flow direction within the deposition chamber in front of the separation device.
  • a number of nozzles are arranged in the deposition chamber such that the cleaning liquid is sprayed onto the separation device in the form of spray jets or in the form of a mist.
  • spraying the cleaning liquid in the form of sprays or spray a particularly good distribution of the cleaning liquid over the entire volume of the separator and thus the filling can be achieved, so that each part of the surface of the filling or the separator comes into contact with the cleaning liquid and thus the deposited there particles of the exhaust gas can be cleaned.
  • the cleaning using the cleaning liquid can preferably be carried out fully automatically periodically by one or more spray scrubbers.
  • the cleaning liquid after spraying moisten substantially all the individual components of the filling and solve there accumulated particles of the exhaust gas and dissipate.
  • the sprayed onto the separation device cleaning liquid moves under the influence of gravity through the channels of the filling to the lower end of the separator and exits there again from the filling.
  • the cleaning liquid wets almost the entire surface of the filling and thereby takes all accumulated particles from the exhaust gas flow with it. This makes it possible to achieve a simple, inexpensive and nevertheless very effective cleaning of the separating device or the filling.
  • the charging device is arranged downstream of the nozzles in the flow direction within the deposition chamber.
  • the charging device can be simultaneously and continuously cleaned by the cleaning fluid discharged from the nozzles, so that no incrustations can form on the charging device and also the use of a ceramic supply line to the charging device would be possible.
  • the materials of the filling for cleaning aggressive exhaust gases are designed such that the filling consists of an electrochemically more noble material than the rest of the separator and therefore acts as a sacrificial anode. This prevents that the deposition chamber or the shell of the separator is corroded by aggressive components from the exhaust gases over time or even dissolved, since the filling acts as a sacrificial anode, but this does not adversely affect the replacement of the filling.
  • a heat exchanger is arranged, in which the temperature of the exhaust gas is lowered and / or a portion of the amount of heat contained in the exhaust gas is recovered.
  • the exhaust gas temperature can be lowered by upstream or downstream of a heat exchanger and thus a part of the energy can be recovered from the exhaust gas.
  • this can be minimized by the amount of liquid sprayed and excessive evaporation of the cleaning liquid can be avoided if the arrangement of the heat exchanger before entering the deposition chamber or the separator takes place.
  • the separation device can be made retrofittable not only for new plants but also for existing exhaust systems.
  • the invention further relates to a method for exhaust gas purification and / or heat recovery, in particular also for exhaust gas purification for the exhaust gases of biomass furnaces, in which an electrostatic precipitator has a separation chamber through which the exhaust gas is passed, wherein in the region of the deposition chamber or adjacent to the deposition chamber a charging device for the electrostatic charging of particles located in the exhaust gas is arranged.
  • the particles charged electrostatically by the charging device can be conducted through a region of the deposition chamber in which a deposition device electrostatically charged or earthed against the charge of the particles is arranged, the region of the separation device being sprayed at least periodically by sprayed-on cleaning liquid and those on the surface of the precipitation device Abborge worn accumulated particles are cleaned.
  • the cleaning liquid is collected after passing through the separation device or is introduced into the sewage network with little contamination when using water as a cleaning liquid.
  • the cleaning liquid is collected and cleaned after passing through the separator or also reused, for example.
  • the used cleaning fluid such as water can either be discharged directly into the sewer or collected and disposed of. This eliminates the need for other dry electrostatic filters periodic cleaning and disposal of dust.
  • the cleaning liquid is discharged together with the particles dissolved in it from the electrostatic precipitator and either collected and disposed of, or treated and discharged into the sewage network, or introduced at lower load directly into the sewage network.
  • the spraying of the cleaning liquid takes place in the flow direction of the exhaust gas through the filling.
  • Another conceivable embodiment provides that the spraying of the cleaning liquid against the flow direction of the exhaust gas takes place through the filling. This makes it possible to achieve an additional countercurrent effect.
  • the spraying of the cleaning liquid takes place in the crossflow or transversely to the flow direction of the exhaust gas through the filling.
  • FIG. 1 is shown in a systematic representation of the basic structure of the inventive electrostatic precipitator 1, wherein the FIGS. 2 to 4 corresponding variants of the electrostatic precipitator 1 according to FIG. 1 represent.
  • the same part numbers designate the same components here.
  • the electrostatic filter 1 according to FIG. 1 consists essentially of two separate, connected via an overflow 14 chambers, wherein in the direction of flow in the front chamber 11, a heat exchanger 7 is indicated, can be coupled with the corresponding amounts of heat from the exhaust stream.
  • This heat exchanger 7 may, but need not be provided in the inventive electrostatic precipitator 1, as for example from FIG. 3 becomes recognizable.
  • an electrode 6 is indicated in the region of the overflow channel 14 with which particles present in the exhaust gas stream are electrostatically charged before they enter the deposition chamber 2 in the region of the separator 12 and described there later Way to be deposited.
  • the electrostatic filter 1 according to FIG. 1 the flow of exhaust gas after entering the inlet 9 is deflected several times before the exhaust gas flow reaches the area of the separator 12.
  • a separation device 12 is arranged from a filling 3 such that it fills the entire flow cross section in the separation chamber 2 and the exhaust gas flow must inevitably pass through the separation device 12.
  • the filling of the separating device 12 may in this case for example consist of a dense packing of chips or wool of metallic materials or the like, between which corresponding flow channels remain open and thus the exhaust gas flow through the filling 3 can pass as a whole.
  • the particles After charging the particles of the exhaust stream through the electrode 6, the particles have changed so that they can attach to the shavings of the filling 3 at a grounding of the filling 3 or at the same polarity of the filling 3 to the polarity of the particles and are held there due to electrical forces of attraction.
  • the filling 3 acts as a kind of filter for the particles of the exhaust stream, due to their electrical charge and the flow through the exhaust stream, which are collected and retained substantially within the filling 3.
  • a nozzle 5 is arranged above the filling 3 of the separator 12 such that it emits a cleaning liquid such as water in the form of a spray field 4 in the direction of the separator 12 and this cleaning liquid by gravity through the filling 3 of the separator 12 therethrough flows and at the bottom of the separator 12 exits again.
  • the cleaning liquid will wash off the particles retained in the filling 3 from the filling 3 and thus clean the filling 3 and wash away the particles via the channels between the chips of the filling 3, for example.
  • the cleaning liquid flows into the lower region of the electrostatic precipitator 1 and can exit the electrostatic precipitator 1 via the outlets 8.
  • the cleaning liquid for example, collected again and cleaned again the nozzle 5 are supplied, it is also conceivable, for example when using water as a cleaning liquid to supply the cleaning fluid directly or after cleaning of the particles to the sewer system.
  • the purified exhaust gas flow exits in the flow direction 11 from the outlet 10 again.
  • FIG. 2 is a modification of the electrostatic precipitator 1 of FIG. 1 shown in that the flow direction 11 of the exhaust gas flow through the electrostatic precipitator 1 is reversed and the exhaust gas flow in the direction of the spray action of the nozzle for the spray field 4, the separator 12 passes. Otherwise, the function of the electrostatic precipitator 1 remains as already described.
  • FIG. 3 is a modification of the electrostatic precipitator 1 of FIG. 1 shown in that the electrostatic precipitator 1 is formed without a heat exchanger 7 and therefore consists essentially only of the separation chamber 12 with the deposition device 12 disposed therein. Again, the function is analogous to the rear in the flow direction 11 of the electrostatic precipitator 1 of FIG. 1 ,
  • FIG. 4 is a modification of the electrostatic precipitator 1 of FIG. 1 to see that the filling 3 of the separator 12 is no longer made of geometrically indeterminate components such as chips, but consists of a parallel arrangement of individual plates 13 which leave between them correspondingly narrow channels for the passage of the gas stream of the exhaust gas open.
  • the plates 13 are electrically charged or grounded analogous to the chips of the filling 3 and interact in the manner already described with the particles of the exhaust gas. Due to the large surface of the plates 13, a corresponding number of particles on the surfaces of the plates 13 when passing through the separator 12 of the FIG. 4 deposit and be cleaned again in the manner already described by the spray field 4.

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  • Electrostatic Separation (AREA)
EP08020223A 2008-11-20 2008-11-20 Filtre électrique à nettoyage humide destiné au nettoyage des gaz d'échappement et procédé correspondant Ceased EP2189223A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP08020223A EP2189223A1 (fr) 2008-11-20 2008-11-20 Filtre électrique à nettoyage humide destiné au nettoyage des gaz d'échappement et procédé correspondant
US12/998,688 US9321056B2 (en) 2008-11-20 2009-11-19 Wet-cleaning electrostatic filter for cleaning exhaust gas and a suitable method for the same
PCT/DE2009/001661 WO2010057488A1 (fr) 2008-11-20 2009-11-19 Électrofiltre d'épuration par voie humide pour épurer des gaz d'échappement ainsi qu'un procédé approprié à cet effet
CA2744038A CA2744038C (fr) 2008-11-20 2009-11-19 Electrofiltre d'epuration par voie humide pour epurer des gaz d'echappement ainsi qu'un procede approprie a cet effet
AU2009317678A AU2009317678B2 (en) 2008-11-20 2009-11-19 Wet-cleaning electrostatic filter for cleaning exhaust gas and a suitable method for the same
DE112009003254T DE112009003254A5 (de) 2008-11-20 2009-11-19 Nass abreinigender elektrofilter zur abgasreinigung sowie ein hierfür geeignetes verfahren

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08020223A EP2189223A1 (fr) 2008-11-20 2008-11-20 Filtre électrique à nettoyage humide destiné au nettoyage des gaz d'échappement et procédé correspondant

Publications (1)

Publication Number Publication Date
EP2189223A1 true EP2189223A1 (fr) 2010-05-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08020223A Ceased EP2189223A1 (fr) 2008-11-20 2008-11-20 Filtre électrique à nettoyage humide destiné au nettoyage des gaz d'échappement et procédé correspondant

Country Status (6)

Country Link
US (1) US9321056B2 (fr)
EP (1) EP2189223A1 (fr)
AU (1) AU2009317678B2 (fr)
CA (1) CA2744038C (fr)
DE (1) DE112009003254A5 (fr)
WO (1) WO2010057488A1 (fr)

Cited By (1)

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EP4389290A1 (fr) 2022-12-21 2024-06-26 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Dispositif et procédé de nettoyage de la surface intérieure de tubes

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CN102284361B (zh) * 2011-06-15 2013-12-04 福建龙净环保股份有限公司 一种烟气除尘系统及其电除尘器
CN103090403B (zh) * 2013-02-20 2015-09-02 上海电气石川岛电站环保工程有限公司 一种锅炉后除尘和烟气余热回收的一体化装置及其应用
AT514928B1 (de) 2013-12-27 2015-05-15 Windhager Zentralheizung Technik Gmbh Verfahren zum Reinigen eines Elektrofilters
FR3067618B1 (fr) * 2017-06-20 2019-07-19 Mgi Coutier Procede de fabrication d'un electro-filtre et electro-filtre associe
CN113154611A (zh) * 2021-06-03 2021-07-23 爱优特空气技术（上海）有限公司 一种静电空气净化装置及使用方法

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US4072477A (en) * 1972-05-11 1978-02-07 The Regents Of The University Of California Electrostatic precipitation process
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US20110252965A1 (en) 2011-10-20
CA2744038A1 (fr) 2010-05-27
AU2009317678A1 (en) 2010-05-27
DE112009003254A5 (de) 2012-11-08
CA2744038C (fr) 2014-06-10
AU2009317678B2 (en) 2014-03-06
US9321056B2 (en) 2016-04-26

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