EP0713425A1 - Electrode de pulverisation pour separateurs electrostatiques constituee d'un support pourvu d'un tissu sur sa face exterieure, et utilisation de l'electrode de pulverisation - Google Patents

Electrode de pulverisation pour separateurs electrostatiques constituee d'un support pourvu d'un tissu sur sa face exterieure, et utilisation de l'electrode de pulverisation

Info

Publication number
EP0713425A1
EP0713425A1 EP94924741A EP94924741A EP0713425A1 EP 0713425 A1 EP0713425 A1 EP 0713425A1 EP 94924741 A EP94924741 A EP 94924741A EP 94924741 A EP94924741 A EP 94924741A EP 0713425 A1 EP0713425 A1 EP 0713425A1
Authority
EP
European Patent Office
Prior art keywords
spray electrode
carrier
electrode according
spray
fabric
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.)
Withdrawn
Application number
EP94924741A
Other languages
German (de)
English (en)
Inventor
Heinz Meffert
Georg Leluschko
Heinz Kunoff
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.)
GEA Group AG
Original Assignee
Metallgesellschaft AG
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 Metallgesellschaft AG filed Critical Metallgesellschaft AG
Publication of EP0713425A1 publication Critical patent/EP0713425A1/fr
Withdrawn legal-status Critical Current

Links

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
    • B03C3/40—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
    • B03C3/64—Use of special materials other than liquids synthetic resins

Definitions

  • Spray electrode for electrostatic precipitators which consists of a carrier, on the outside of which a fabric is arranged. and use of the spray electrode
  • the invention relates to a spray electrode for electrostatic precipitators, which consists of a carrier, on the outside of which a fabric is arranged, and to the use of the spray electrode.
  • DE-OS 28 51 757 and DE-AS 23 11 468 spray and precipitation electrodes are described which consist of carbon.
  • the carbon is used in the form of fabrics, felts and yarns.
  • DE-PS 25 00 888 describes a precipitation electrode for electrostatic precipitators which has on its electrically conductive surface a film made of carbon which is permanently connected to a carrier.
  • the carbon film consists of pressed graphite, while the carrier can consist of a plastic.
  • EP 0 031 623 A1 describes an electrode which consists of an electrically conductive carrier on which a fiber material made of a dielectric material is arranged.
  • DE-GB 1 694 459 describes an acid-resistant spray electrode for electrostatic precipitators, which consists of an acid-resistant, non-metallic support body and an acid-resistant metal as a spray element, in which metal foils, in particular made of noble metal, are arranged in the support body in such a way that the foils form spray tips or spray edges on the surface of the support body.
  • US Pat. No. 1,130,215 describes an electrode which consists of a perforated carrier, on the surface of which carbon is arranged.
  • the carbon is used in powder form and forms spray tips on the outside.
  • DE-OS 25 18 952 describes a device for removing solid or liquid particles from a gas flow, in which the gas flow is passed through a separation space which is delimited by two electrodes arranged opposite one another and in which an electric field is placed between the electrodes Strength is generated that no significant ionization occurs in the gas flow.
  • at least one of the electrodes is provided with a covering made of a fiber material with limited electrical conductivity, which has a large number of outstanding thin fibers.
  • the clothing can consist of asbestos fibers, glass fibers, textile fabrics, stainless steel or fine metal fibers, which are embedded in a plastic carrier.
  • the object on which the invention is based is to create a spray electrode for electrostatic separators which is corrosion-resistant and at the same time has an electrostatic charge the solid and / or liquid particles present in the gas in the corona for electrostatic deposition.
  • the carrier consists of electrically non-conductive materials, on the outside of which a fabric made of crossed and twisted yarns made of carbon fibers is arranged.
  • the carrier advantageously consists of plastics or rubbers.
  • the carbon fibers advantageously consist of graphite and have a diameter of 5 to 10 ⁇ m.
  • Dry or wet electrostatic precipitators can be used as electrostatic precipitators. It has surprisingly been found that the fabric of crossed and twisted yarns made of carbon fibers, which is arranged on the outside of the carrier made of electrically non-conductive materials, enables a corona through which the solid or liquid particles contained in the exhaust gas are electrostatically charged and be deposited on the precipitation electrodes.
  • the spray electrode is extremely corrosion-resistant and is therefore suitable for relatively long operating times.
  • a preferred embodiment of the invention is that the yarns each consist of 2400 to 3600 carbon fibers.
  • the fabric can be produced from these yarns relatively easily using the bobbin lace method.
  • the bobbin lace process is to be understood to mean the crossing and twisting of twisted yarns in accordance with the pattern, which today is usually done with modern ones Machines is carried out automatically. If the yarns consist of 2400 to 3600 carbon fibers, the effect of the individual fabric sections as spray tips is enhanced and a homogeneous formation of the corona is facilitated.
  • the fabric has an average thickness of 0.3 to 0.7 mm.
  • the spray electrode has a relatively high mechanical stability on its outside.
  • the carrier consists of synthetic elastomers. This measure makes the spray electrode flexible and, like a cord, it can be folded up. This facilitates the transportation and assembly of the spray electrode.
  • synthetic elastomers For example, butyl rubber can be used as the synthetic elastomer.
  • the carrier has an aramid core.
  • Aramids are to be understood as the aromatic polyamides from aromatic diamines and arylene dicarboxylic acids. If the carrier contains an aramid core, the tensile strength of the spray electrode is increased noticeably in a relatively simple manner, so that the arrangement of weights, which are generally 2 to 5 kg, can be carried out relatively quickly, and the spray electrode even at particularly high gas velocities can be used in an advantageous manner.
  • the core has a circular cross section with a diameter of 1 to 3 mm. A core with a circular cross-section with a diameter of 1 to 3 mm can be worked into the carrier in a relatively simple manner. This simplifies the manufacture of the spray electrode, and at the same time a relatively high tensile strength of the spray electrode can be achieved.
  • the carrier or the core and carrier unit has a circular cross section with a diameter of 5 to 10 mm. This measure enables the fabric of crossed and twisted carbon fiber yarns to be arranged uniformly on the outside of the carrier, and at the same time a uniform corona can be formed over the entire effective length of the spray electrode.
  • Another preferred embodiment of the invention consists in that the upper end and / or the lower end are encased in a length of 400 to 600 mm with an additional layer of synthetic elastomers.
  • synthetic elastomers can be used as the synthetic elastomer.
  • the synthetic elastomers can be applied to the upper and / or the lower end, for example, by vulcanization.
  • spark erosion often occurs in spray electrodes at the upper end and / or at the lower end, which reduces the separation efficiency of the electrostatic separator.
  • this undesirable spark erosion can be avoided and the efficiency of the electrostatic precipitator can be increased.
  • the lower end in the lower part has at least one projection transverse to the longitudinal axis of the spray electrode. This measure makes it relatively easy to attach weights to stabilize the spray electrode.
  • the upper end has an eyelet.
  • the spray electrode can be arranged relatively easily in the electrostatic separator. This measure also enables a relatively easy retrofitting of electrostatic precipitators through the additional simple arrangement of further spray electrodes, which may be necessary if the values of the exhaust gases to be treated fluctuate to a greater extent.
  • the invention relates to the use of the spray electrode for the treatment of exhaust gases containing SO or SO. Or HF or HC1 or mixtures thereof in electrostatic precipitators. It is advantageous that larger amounts of exhaust gases containing SO or SO, or HF or HCl or mixtures thereof can be freed from the acidic pollutants and the spray electrode no corrosive damage caused by SO or SO, or HF or HCl or mixtures thereof.
  • the object of the invention is explained in more detail with reference to the drawing ( Figure 1, Figure 2).
  • Figure 1 shows a longitudinal section through the spray electrode for electrostatic precipitators.
  • FIG. 1 shows the spray electrode for electrostatic precipitators in cross section according to section A-A in Figure 1.
  • the spray electrode for electrostatic precipitators is shown in longitudinal section.
  • the spray electrode is divided into an upper end a, a middle part b and a lower end c.
  • the middle part b is used to form the corona required for electrostatic deposition.
  • a core (1) which is surrounded by a carrier (2), is arranged in the center of the spray electrode.
  • the core (1) preferably consists of aramid.
  • the carrier (2) preferably consists of synthetic elastomers.
  • a fabric (3) made of crossed and twisted carbon fiber yarns is arranged on the outside of the non-electrically conductive carrier (2).
  • the upper end a and the lower end c are covered with an additional layer (4) made of synthetic elastomers.
  • FIG. 2 shows the cross section of the spray electrode according to section AA in FIG. 1.
  • An electrically non-conductive carrier (2) is arranged around the core (1), which preferably consists of aramide.
  • the core (1) and carrier (2) unit has a circular cross section.
  • a fabric (3) made of crossed and twisted carbon fiber yarns is arranged on the outside of the carrier (2).
  • the waste gas generated during the combustion of waste has a temperature of 78 ° C, a dew point of 78 ° C,
  • Precipitation electrodes are used, which in the
  • a carrier made of synthetic elastomers is arranged around the core of each spray electrode.
  • the unity of core and carrier of one each spray electrode has a circular
  • a fabric made of crossed and twisted carbon fiber yarns is arranged on the outside of each carrier.
  • the fabric has a thickness of 0.5 mm.
  • the upper ends and the lower ends of the individual spray electrodes are in a length of
  • the lower ends have a projection transverse to the longitudinal axis of the
  • Spray electrodes have an eyelet, the
  • Internal diameter is 11 mm and is used to hang up the individual spray electrodes. With a field strength in the range of 2 to 4 kV / cm a was in the clean gas
  • Operating times of the spray electrodes can be up to 4
  • An exhaust gas with the same composition as in the example above is treated under the same conditions in the same electrostatic precipitator.
  • electrostatic precipitators are used between the plate-shaped ones
  • Precipitation electrodes arranged in the center at the same distance as in the example of spray electrodes. which are made of stainless steel wires.
  • the spray electrode according to the invention for electrostatic precipitators enables not only easy handling and corrosion resistance, but also an increase in the efficiency of the electrostatic precipitator, which is due to the uniform formation of the corona in the middle part of the spray electrode.

Landscapes

  • Electrostatic Separation (AREA)

Abstract

Une électrode de pulvérisation est constituée d'un support (2) en matériaux non électroconducteurs qui porte sur sa face extérieure un tissu (3) constitué de fils croisés et torsadés de fibres de carbone.
EP94924741A 1993-08-11 1994-07-12 Electrode de pulverisation pour separateurs electrostatiques constituee d'un support pourvu d'un tissu sur sa face exterieure, et utilisation de l'electrode de pulverisation Withdrawn EP0713425A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4326895 1993-08-11
DE4326895A DE4326895C1 (de) 1993-08-11 1993-08-11 Sprühelektrode für elektrostatische Abscheider, die aus einem Träger besteht, auf dessen Außenseite ein Gewebe angeordnet ist, sowie Verwendung der Sprühelektrode
PCT/EP1994/002275 WO1995004601A1 (fr) 1993-08-11 1994-07-12 Electrode de pulverisation pour separateurs electrostatiques constituee d'un support pourvu d'un tissu sur sa face exterieure, et utilisation de l'electrode de pulverisation

Publications (1)

Publication Number Publication Date
EP0713425A1 true EP0713425A1 (fr) 1996-05-29

Family

ID=6494902

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94924741A Withdrawn EP0713425A1 (fr) 1993-08-11 1994-07-12 Electrode de pulverisation pour separateurs electrostatiques constituee d'un support pourvu d'un tissu sur sa face exterieure, et utilisation de l'electrode de pulverisation

Country Status (4)

Country Link
US (1) US5792243A (fr)
EP (1) EP0713425A1 (fr)
DE (1) DE4326895C1 (fr)
WO (1) WO1995004601A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030231459A1 (en) * 2001-10-25 2003-12-18 Robertson Reginald R. Ion chip composite emitter
CA2477405A1 (fr) * 2002-03-01 2003-09-12 Per-Tec Limited Support d'electrode
US7976616B2 (en) * 2005-04-19 2011-07-12 Ohio University Composite discharge electrode
EP1928608A4 (fr) * 2005-09-29 2011-06-01 Sarnoff Corp Circuit ballast pour systemes a recueillir les particules electrostatiques
KR101181546B1 (ko) * 2005-11-02 2012-09-10 엘지전자 주식회사 정전식모 섬유를 포함하는 공기정화기
EP2105205B1 (fr) 2008-03-28 2011-08-10 ISI-Industrie-Produkte GmbH Elément d'ionisation et filtre électrostatique
DE102009016380B4 (de) * 2009-04-07 2022-08-11 Haver & Boecker Ohg Gewebe
WO2011005947A1 (fr) 2009-07-09 2011-01-13 Ohio University Électrode de décharge composite à base de fibre de carbone
SE1130120A1 (sv) * 2011-05-15 2012-11-16 Karl G Rosen Metod att förbättra foderomvandlingen och prestanda hos högproducerande djur
EP3001821A4 (fr) * 2013-06-28 2017-04-12 Ohio University Électrode de décharge composite à fibre de carbone à sollicitation mécanique
US10022727B2 (en) * 2013-09-25 2018-07-17 Ohio University Discharge electrode suspension system using rings

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US913941A (en) * 1908-11-17 1909-03-02 Lucien I Blake Ionizer or apparatus for producing gaseous ions.
US1067974A (en) * 1911-11-06 1913-07-22 Int Precipitation Co Method of discharge of electricity into gases.
US1130215A (en) * 1914-06-10 1915-03-02 Semet Solvay Co Discharging-electrode and method of forming the same.
US1428839A (en) * 1919-02-25 1922-09-12 Westinghouse Electric & Mfg Co Ionizing electrode for precipitating apparatus
US1650097A (en) * 1925-09-09 1927-11-22 Int Precipitation Co Electrical precipitator
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GB734207A (en) * 1952-10-27 1955-07-27 Lodge Cottrell Ltd Improvements in or relating to apparatus for the electrostatic precipitation of suspended particles from gaseous fluids
DE1102107B (de) * 1955-09-19 1961-03-16 Bischoff Gasreinigung Stacheldrahtaehnliche Ausstroemelektrode fuer Elektrofilter
GB1176648A (en) * 1966-07-19 1970-01-07 Ici Ltd Polyamides.
DE2311468C3 (de) * 1973-03-08 1980-06-26 Aluminium-Huette Rheinfelden Gmbh, 7888 Rheinfelden Sprühelektroden in Elektroabscheideranlagen aus fadenförmigem Material
NL155199B (nl) * 1974-05-13 1977-12-15 Bronswerk Apparatenbouw Inrichting voor het verwijderen van vaste of vloeibare deeltjes uit een gasstroom.
DE2500888C2 (de) * 1975-01-10 1985-10-10 Elex AG, Zürich Elektrode sowie Elektroabscheider mit Elektrode
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Also Published As

Publication number Publication date
WO1995004601A1 (fr) 1995-02-16
US5792243A (en) 1998-08-11
DE4326895C1 (de) 1994-08-25

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