EP3484626B1 - Elektrostatischer abscheider - Google Patents

Elektrostatischer abscheider Download PDF

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Publication number
EP3484626B1
EP3484626B1 EP17830520.7A EP17830520A EP3484626B1 EP 3484626 B1 EP3484626 B1 EP 3484626B1 EP 17830520 A EP17830520 A EP 17830520A EP 3484626 B1 EP3484626 B1 EP 3484626B1
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EP
European Patent Office
Prior art keywords
flue gas
electrostatic precipitator
plate
cathode
scraper
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.)
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Application number
EP17830520.7A
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English (en)
French (fr)
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EP3484626A4 (de
EP3484626A1 (de
Inventor
Christian C. LARSEN
Niels E. Linnemann NIELSEN
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.)
Maskinfabrikken Reka Holding AS
Original Assignee
Maskinfabrikken Reka Holding AS
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/40—Electrode constructions
    • B03C3/45—Collecting-electrodes
    • B03C3/47—Collecting-electrodes flat, e.g. plates, discs, gratings
    • 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
    • B03C3/10—Plant or installations having external electricity supply dry type characterised by presence of electrodes moving during separating action
    • 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
    • B03C3/361—Controlling flow of gases or vapour by static mechanical means, e.g. deflector
    • 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
    • B03C3/60—Use of special materials other than liquids
    • 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
    • B03C3/743—Cleaning the electrodes by using friction, e.g. by brushes or sliding elements

Definitions

  • the present invention relates to an Electrostatic precipitator as stated in the preamble of claim 1.
  • Removal of particles can efficiently be done with a scrubber, filter, for instance as a bag, or by means of an Electrostatic precipitator.
  • a scrubber has disadvantages in terms of the form of the residual product and the surrounding environment, including expenses for water and chemical remedies.
  • the residual product which is aggressive in the liquid state, makes large demands on choice of material for the equipment, as the equipment otherwise would be corroded quickly.
  • Bag filters cause a large pressure loss and have a lower efficiency. The pressure loss increases rapidly as particles accumulate in the bag, which affects the operational reliability in a negative manner.
  • an Electrostatic precipitator consists of an air lock in which electrodes in the form of anodes are located, typically consisting of conductive threads with an electrode counterpart of conductive metal plates, which form a cathode.
  • the anode and the cathode are connected to a power supply which supplies a voltage in the region of 20 to 100 kV.
  • the power supply comprises a transformer and a rectifier circuit such that a pulsating or a direct voltage is achieved.
  • the direct voltage can also be overlaid by a short pulsating voltage in order to better be able to penetrate the layer of dust.
  • the particles are ionized when passing by the electrical field and are attracted by the conductive metal plate, which constitutes the cathode, and can be removed in a relatively simple manner e.g. by beating on the plate, which must be done regularly.
  • Electrostatic precipitators these are highly efficient for removing dust including fine and ultra-fine particles. For that reason Electrostatic precipitators are commonly used in the industry and in waste incineration. In regular waste for incineration the flue gas contains the entire spectrum of particle sizes and since the dust also contains some carbon the cathode plate will retain its effect even when a layer of dust has accumulated thereon. This is due to the fact that the layer of dust in the same manner as the cathode plate has electroconductive abilities.
  • the distribution plates are inserted in more sections.
  • a first section where the flue gas is introduced through a tube from the incinerator where an inlet is shaped as a funnel and where plates are arranged in the funnel for spreading or distributing the flue gas such that the flue gas at the outlet of the funnel is distributed evenly over the entire area of the outlet.
  • the funnel shape receives the flue gas at that end of the funnel with the smallest cross-section area and releases the flue gas at that end of the funnel with the largest cross-section area.
  • the inlet funnel thus divides or separates the incoming flow into a number of sections.
  • the area of the outlet can reflect the internal width of the cabinet.
  • the inlet funnel functions as a transition between the exhaust tube from the cross-section area of the incinerator to the outlet of the area of the funnel, where the cross-section area of the exhaust can be can be adapted to a height or width dimension of the filter.
  • the outlet of the funnel-shape is adapted to both a height and width dimension of the filter.
  • the division in the inlet funnel can expediently be done in a vertical direction such that the flow of the flue gas is spread out from a relatively modest tube size of between 100 to 400 mm in the exhaust tube to the entire width of the filter cabinet.
  • the flue gas is led in a vertical direction either in an upward-going direction or most commonly due to the height and natural exhaust at the topmost part of the incinerator, in a downwards direction in the cabinet for the filter inlet.
  • the flow of the flue gas is in the vertical course at different horizontal heights divided into segments or layers by insertion of screens at different horizontal heights in order to separate and channel a portion of the flow of the flue gas into the cabinet for the filter in a horizontal direction.
  • the screens which divides the flue gas into segments in the horizontal plane, are arranged in the inlet funnel. In another embodiment they are arranged after the inlet funnel in the cabinet of the filter in the area before the electrically active electrode parts.
  • the screens should be dimensioned such that the division of the flue gas ensures a homogenous speed of the flue gas over the entire area of the inlet of the filter, as it is thus prevented that the cathode plates become crooked due to uneven heat impact.
  • a somewhat higher flue gas flow in the central area can however be desired, as the stroking of the cathode plates here has a longer course. This will result in a better efficiency of the filter.
  • the inlet funnel thus serves the purpose of changing the flow of the flue gas to a wider flow while still ensuring that the flue gas has a homogenous speed throughout the flow. In an embodiment this takes place in the vertical course. Furthermore, a number of screens are instated into the inlet in the cabinet for the filter, which divides and distributes the flow of the flue gas in the horizontal plane in the cabinet for the filter before the flue gas is led past the anode and the cathode electrodes in the Electrostatic precipitator.
  • the number of screens in the vertical direction and in the horizontal direction and their spreading and location is determined by the difference between the hydraulic area of the inlet tube from the incinerator and the hydraulic area of the filter for flow of flue gas in terms of the speed of the flue gas.
  • the dimensioning must be done based on a wish that the flue gas flow from the incinerator is distributed through the Electrostatic precipitator in a homogenous flow throughout the entire course of the Electrostatic precipitator.
  • the distance between the dividing plates is thus calculated based on the hydraulic area in each section and the speed profile of the incoming flow. At a higher inlet speed of the flue gas the incoming flow has a more flat profile, whereas it is more dish-shaped at a lower speed.
  • This structure ensures a homogenous speed of flue gas in the cabinet where the aim is that all cathode plates are stroked by the same amount of flue gas and on both sides of the cathode plates.
  • the flue gas is let in from above and directly downwards towards the bottom of the cabinet but can also be let in from other angles, e.g. from the sides or the bottom. Since the flue gas is hot it will rise upwards. For that reason inlet from the top towards the bottom is advantageous.
  • plates are inserted at various heights in the cabinet, which distribute the flow of flue gas from the inlet in a mostly horizontal direction.
  • the screens can be angled such that they regulate the flue gas downwards towards the bottom. This counteracts the tendency of the hot flue gas to rise upwards towards the top of the cabinet as a result of thermodynamics.
  • the invention comprises another step, which is adapted to regulate the spreading of the flow gas in the cabinet.
  • the Electrostatic precipitator in an embodiment comprises at least one plate with a number of holes for passage of flue gas, arranged at a position between inlet and outlet such that the flow of flue gas during the passage through the holes is regulated and distributed evenly between the cathode plates.
  • the flow of the flue gas further serves the purpose of obtaining a disposition of flue gas which is as large as possible for the electrical field between the anode and cathode electrodes and thus obtaining a better cleaning ability of dust in the filter.
  • the device comprises at least one plate with a number of holes for passage of flue gas arranged at a position between the cathode plates such that the flow of flue gas during passage through the holes is regulated and distributed evenly between the cathode plates.
  • This position is desirable as the distribution of the flue gas is particularly important over the surface of the cathode plates in order to avoid temperature differences over the surface of the plate and resulting mechanical tension and crookedness.
  • the plate is arranged in the cabinet in a vertical direction compared to the flow of the flue gas from inlet to outlet through the Electrostatic precipitator.
  • the device consisting of the plate for regulating the flow of flue gas is equipped with recesses or grooves where at least part of the cathode plates can be led through.
  • the device consisting of the plate for regulating the flow of flue gas is in itself or with an attached distributing plate retained relative to the cabinet, but is in movable contact with at least one cathode plate arranged on the rotatable shaft and is adapted to function as a scraper at contact with the cathode plate.
  • the device is equipped with a folded down edge, where the edge functions as a scraper.
  • the scraper is made from a flexible material and arranged resiliently suspended in contact with the cathode plate.
  • the scraper is arranged in contact with the cathode plate is such a manner that the folding of the edge is constructed such that the edge forms a sharp angle towards the direction of rotations on the cathode plate and thus functions as a cutting blade during the rotation of the cathode plate.
  • the cathode plate is rapidly packed with the fine and ultra-fine dust particles, which constitute a hard layer, which is electrically insulating, for which reason the effect of the Electrostatic precipitator rapidly decreases.
  • the ultra-hard thin layer is not electrically insulating, but has by and large the same efficiency in terms of capturing particles as a new and unused cathode plate. It has proven that this effect is also obtained by compression of the fine, thin and ultra-hard layer. Concrete measurings have proven that an embodiment of a scraper which presses against the cathode plate with a force of more than 5 N/cm has an adequate effect for removing the main part of the fine and ultra-fine particles, which have accumulated on the cathode plate and for compression of the remaining thin layer.
  • the scraper is arranged in the side of the cabinet, which faces towards the inlet.
  • the filter can handle any particles which are scraped off the cathode plate and whirled upwards by the flue gas and capture these particles again, thus minimizing the amount of particles which are released into the outlet.
  • the scraper is arranged in contact with the lower half-circle of the cathode plate.
  • the cathode plates are made from close-grained alloyed steel, which is corrosion-resistant in that especially the chrome content in the alloy forms a protective surface which is still electro-conductive.
  • a trade name for the chosen steel type is "Cor Ten”. It is also known under the English term “weathering steel” as it is used for facades of buildings and is known for its rusty red patina.
  • a commercially available product, which is applicable for cathode plates, is CORTEN A EN 10025-5 or Cor-Ten A/S355 JOW.
  • a cathode plate made from close-grained alloyed steel (COR TEN A) and a scraper made from fine-grained corrosion-resistant steel (304) have good concurrent properties when it comes to removing particles from the cathode plate. Since the scraper is made from a softer material this will be worn more than the cathode plate and not leave marks on the cathode plate. When the scraper gets so worn that it no longer pushed with the necessary force against the cathode plate it is relatively easy to replace with a new and in-expensive scraper.
  • a metal plate is in its nature rough and has a surface filled with small protrusions and small depressions, where there are cracks and small holes in protrusions and depressions. The fine and ultra-fine particles are captured and are difficult to remove from these cavities again.
  • the plate is in an embodiment a corrosion-resistant steel plate, which is electropolished. Electropolishing is a treatment of the surface of a metal plate with a combination of chemistry and electrical impact, after which the plate appears smooth and shiny.
  • the cathode plate is covered or coated with an electroconductive coating.
  • the electroconductive coating can be metallic or ceramic or a combination thereof.
  • a coating which consists of smaller particles than the fine and ultra-fin particles which should be collected is particularly suitable, as the fine and ultra-fine particles by virtue of their size will experience difficulties in sticking to the surface.
  • a coating of the cathode plated with an electroconductive ceramic coating of nanoparticles is thus a suitable solution.
  • a cathode plate with a surface coated with nanoparticles will thus be easier to clean by which the scraper is made redundant and can be replaced with a brush with hair of a heat-resistant material.
  • the hairs of the brush can e.g. be made from copper, brass, steel but also for instance ceramic fibres.
  • the scraper can be made from or contain at least one of the following materials: steel, iron, aluminum, copper, brass, ceramic.
  • the scraper is designed as a brush with hairs, which contain a heat-resistant material such as copper, steel, fibre of glass etc.
  • FIG. 1 of the drawing which shows a cabinet 2 for an Electrostatic precipitator 1
  • an inlet 3 is shown at the left, where the flue gas, which should be cleaned of particles, is supplied.
  • the cleaned flue gas is led out of the cabinet via an outlet 4 and further on to a chimney (not shown).
  • an operating device 5 At the front of the cabinet there is an operating device 5 and a motor drive 6 with a gearing.
  • the motor drive 6 rotates cathode plates 7 as shown in fig. 2 which shows a section through the longitudinal direction of the cabinet 2.
  • the cathode plates are suspended on a shaft 8, which are arranged in a bearing 9 in both sides of the cabinet 2.
  • the parts which are located in the part of the flue gas flow, which can be denominated the plume of smoke, are heated more than the other areas in the cabinet which entails a risk of tension and deformation of the materials, where particularly a deformation of the cathode plates 7 is problematic in connection with cleaning thereof.
  • a smoke plate 14 (shown in Fig. 2 and 3 ) is inserted from top to bottom in the cabinet 2, where slots 15 are provided for lead-in of cathode plates 7. Further the smoke plate 14 is equipped with holes 16 of various sizes which each are adapted to regulate flow of flue gas such that a homogeneous speed of the smoke and temperature distribution in the entire cabinet 2 is achieved. This also ensures that the cathode plates 7 are evenly and homogenously stroked by the flue gas by which electrically loaded particles are deposited on the cathode plates.
  • distribution plates 17 are inserted between the cathode plates 7 for adjusting the flow of the flue gas through the cabinet 2 from inlet to outlet.
  • a detailed drawing of a distribution plate 17 according to the invention is shown in Fig. 6 , where a number of through-going holes 18 are shown.
  • the holes 18 are arranged in a row but the embodiment should not be considered limiting to the invention as the holes with their size and position are configured to provide an even flow through the cabinet which ensures a homogenous heat distribution.
  • the location and size of the holes can thus be randomly positioned based on tests or calculations in order to facilitate an even heat distribution in the cabinet and prevent the cathode plates from becoming crooked due to an uneven heat distribution. As it can be noticed from fig.
  • FIG. 7 which shows a cross-section of a distribution plate 17 this is equipped with a folded down edge 19 on both sides.
  • the width of the distribution plate 17 is so large that when this is mounted between the cathode plates 7 the edge constitutes a scraper 20 against the cathode plates 7 which flank the distribution plate 17 on both sides.
  • the dimensioning of the distribution plate 17, including the width of the plate and the material thickness as well as the fold angle of the scraper-part determines its resilient abilities against the cathode plates 7. Thus, an appropriate elastic force can be determined. A value of 5N/cm is appropriate.
  • a scraping of the cathode plates 7 is desired, which removes the particles, which is attracted by the electrical field, but the scraping should not be so hard that the cathode plates 7 and the scrapers 20 are worn too quickly. This is achieved partly by the choice of material where the cathode plates are made from COR TEN A steel (close-grained steel) and scrapers 20 on the distribution plate 17 are made from corrosion-resistant fine-grained steel as type 304.
  • Fig. 8 shows a microscopic view of a cross-section of the surface of a cathode plate 7. As it appears the plate has a certain roughness, which resembles a mountain or hill landscape 21. Since the roughness is larger than the particle size of the particles which should be collected, the particles will quickly fill the cathode plate 7 with electrically insulating dust, which prevents the further operation of the Electrostatic precipitator 1.
  • Fig. 9 shows a microscopic view where the cathode plate 7 has gathered a layer of particles 22. Because of the peaks, a scraping cannot remove all particles 22 and reestablish the full original function of the Electrostatic precipitator. However, it has proven that the pressure, which the scraper 20 exerts on the thin layer of particles of approximately 100 micrometers, makes the layer more electroconductive such that the cathode plate 7 again can attract new particles 22.
  • the cathode plate 7 is as smooth as possible, such that the cracks, bumps and indentations 21 which are present in the surface, are smaller than the size of the particles 22, which are attracted to the cathode plate 7. If a cathode plate 7 of a corrosion-resistant material is chosen, this can be polished, possibly electropolished, such that the surface becomes completely smooth which is illustrated in fig. 10 . It is also possible to make the cathode plate smooth by applying an electroconductive layer, a coating. This can be a ceramic coating with conductive nanoparticles.
  • the particles 22 in the flue gas which are attracted to the cathode plate in the electrical field, are larger than the particle size of the coating of the cathode plate, they will not be able to bind as hard to the cathode plate 7 and thus be easier to remove, for instance by means of a brush.
  • a cross section of a cathode plate 7 is shown, where the edge 23 thereof is visible.
  • the edge 23 is curved as tests have shown that many flashovers emanate from the edge, and it has proven that the curved shape better counters flashovers. Tests also show that an accumulation of dust particles on the edge can cause more flashovers. Therefore according to the invention a scraper 24 is devised, which is arranged in the cabinet 2 in such a manner that it strokes or scrapes the edge 23 of the cathode plate 7 and keeps it clean. As it appears the scraper 24 is equipped with a recess 25, which is curved and which reaches over the curvature of the edge 23 for which reason the cathode plate 7 is kept clean when it rotates.

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  • Electrostatic Separation (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Claims (14)

  1. Elektrostatischer Abscheider, umfassend:
    - ein Gehäuse (2) mit:
    - einem Einlass (3) für das Einströmen von Rauchgas;
    - einem Auslass (4) für das Ausströmen von gereinigtem Rauchgas;
    - einer Halterung, die zwischen Einlass und Auslass angeordnet ist, um eine drehbare Welle (8) zu tragen, wobei auf der Welle eine Anzahl paralleler elektronisch leitfähiger Platten angeordnet ist, die so angepasst sind, dass sie als Kathoden (7) fungieren;
    - einem Motor (6) zum Drehen der drehbaren Welle (8);
    - einer Anordnung (11) zum Halten einer Anzahl von leitfähigen Fäden (10), die als Anoden fungieren, und zum Anordnen dieser Fäden derart, dass sie durch den Bereich zwischen den Kathodenplatten (7) geführt werden;
    - einer Stromversorgung mit Anschluss zu Anode und Kathode, wobei die Vorrichtung dadurch gekennzeichnet ist, dass der elektrostatische Abscheider mindestens eine Platte (14) mit einer Anzahl von Löchern (16) zum Durchtritt von Rauchgas umfasst, wobei die mindestens eine Platte (14) in einer Position zwischen den Kathodenplatten (7) angeordnet ist und Schlitze zum Einführen der Kathodenplatten (7) umfasst, so dass der Rauchgasstrom während des Durchgangs durch die Löcher reguliert und gleichmäßig zwischen den Kathodenplatten verteilt wird.
  2. Elektrostatischer Abscheider nach Anspruch 1, dadurch gekennzeichnet, dass
    die Platte (14) im Gehäuse (2) in Bezug auf den Rauchgasstrom vom Einlass (3) zum Auslass (4) durch den elektrostatischen Abscheider vertikal angeordnet ist.
  3. Elektrostatischer Abscheider nach einem der Ansprüche 1 oder 2,
    dadurch gekennzeichnet, dass
    die Größe und Position der Löcher (16) im Hinblick auf eine gleichmäßige Verteilung des Rauchgases zwischen den Kathodenplatten (7) strukturiert sind.
  4. Elektrostatischer Abscheider nach einem der vorstehenden Ansprüche,
    dadurch gekennzeichnet, dass
    der elektrostatische Abscheider ferner eine Trennplatte (17) umfasst, die in Verbindung mit der Platte (14) zum Regulieren des Rauchgasstroms angeordnet ist.
  5. Elektrostatischer Abscheider nach Anspruch 4, dadurch gekennzeichnet, dass
    die Trennplatte (17) über der/den Öffnung(en) (16) in der Platte (14) zum Regulieren von Rauchgas montiert ist.
  6. Elektrostatischer Abscheider nach einem der vorstehenden Ansprüche,
    dadurch gekennzeichnet, dass
    die Vorrichtung, die aus der Platte (14, 17) zum Regulieren des Rauchgasstroms besteht, relativ zu dem Gehäuse (2) gehalten wird, jedoch in einem beweglichen Kontakt mit mindestens einer Kathodenplatte (7) steht, die auf der drehbaren Welle (8) angeordnet und dazu ausgelegt ist, während des Kontakts mit der Kathodenplatte (7) als Abstreifer (20) zu fungieren.
  7. Elektrostatischer Abscheider nach einem der Ansprüche 4 bis 6,
    dadurch gekennzeichnet, dass
    die Trennplatte (17) mit einer abgeklappten Kante (19) ausgestattet ist, wobei die Kante als Abstreifer (20) fungiert.
  8. Elektrostatischer Abscheider nach Anspruch 7, dadurch gekennzeichnet, dass
    die abgeklappte Kante (19) zwischen 10 und 100 mm mit einer bevorzugten Faltung von 40 mm misst.
  9. Elektrostatischer Abscheider nach einem der Ansprüche 4 bis 8,
    dadurch gekennzeichnet, dass
    die Trennplatte (17), die einen Abstreifer bildet, aus einem flexiblen Material hergestellt ist, das eine Dicke zwischen 0,5 und 2,0 mm aufweist.
  10. Elektrostatischer Abscheider nach einem der Ansprüche 4 bis 9,
    dadurch gekennzeichnet, dass
    die Trennplatte (17), die einen Abstreifer bildet, aus einem flexiblen Material mit einer Dicke von 0,7 mm hergestellt ist.
  11. Elektrostatischer Abscheider nach einem der Ansprüche 4 bis 10,
    dadurch gekennzeichnet, dass
    die Trennplatte (17), die einen Abstreifer bildet, feinkörnigen, korrosionsbeständigen Stahl enthält.
  12. Elektrostatischer Abscheider nach einem der Ansprüche 4 bis 11,
    dadurch gekennzeichnet, dass
    die Trennplatte (17), die einen Abstreifer bildet, in Kontakt mit der Kathodenplatte mit einer Kraft zwischen 2 und 10 N/cm, wobei der bevorzugte Wert 5 N/cm ist, elastisch suspendiert angeordnet ist.
  13. Elektrostatischer Abscheider nach einem der Ansprüche 4 bis 12,
    dadurch gekennzeichnet, dass
    die Trennplatte (17), die einen Abstreifer bildet, an der Seite des Gehäuses (2) angeordnet ist, die dem Einlass (3) zugewandt ist.
  14. Elektrostatischer Abscheider nach einem der Ansprüche 4 bis 15,
    dadurch gekennzeichnet, dass
    die Trennplatte (17), die einen Abstreifer bildet, in Kontakt mit dem unteren Halbkreis der Kathodenplatte (7) angeordnet ist.
EP17830520.7A 2016-07-17 2017-07-17 Elektrostatischer abscheider Active EP3484626B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA201600429A DK179332B1 (da) 2016-07-17 2016-07-17 Elektrofilter
PCT/DK2017/050244 WO2018014920A1 (en) 2016-07-17 2017-07-17 Electrostatic precipitator

Publications (3)

Publication Number Publication Date
EP3484626A1 EP3484626A1 (de) 2019-05-22
EP3484626A4 EP3484626A4 (de) 2020-07-15
EP3484626B1 true EP3484626B1 (de) 2022-08-10

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EP17830520.7A Active EP3484626B1 (de) 2016-07-17 2017-07-17 Elektrostatischer abscheider

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