EP2621636B1 - Étage collecteur d'un séparateur électrostatique pour la purification de gaz de fumée formés par des procédés de combustion - Google Patents

Étage collecteur d'un séparateur électrostatique pour la purification de gaz de fumée formés par des procédés de combustion Download PDF

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Publication number
EP2621636B1
EP2621636B1 EP11773384.0A EP11773384A EP2621636B1 EP 2621636 B1 EP2621636 B1 EP 2621636B1 EP 11773384 A EP11773384 A EP 11773384A EP 2621636 B1 EP2621636 B1 EP 2621636B1
Authority
EP
European Patent Office
Prior art keywords
collector
brush
pipe
stage
collector pipe
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.)
Not-in-force
Application number
EP11773384.0A
Other languages
German (de)
English (en)
Other versions
EP2621636A1 (fr
Inventor
Hanns-Rudolf Paur
Andrei Bologa
Klaus Woletz
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.)
Karlsruher Institut fuer Technologie KIT
Original Assignee
Karlsruher Institut fuer Technologie KIT
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 Karlsruher Institut fuer Technologie KIT filed Critical Karlsruher Institut fuer Technologie KIT
Publication of EP2621636A1 publication Critical patent/EP2621636A1/fr
Application granted granted Critical
Publication of EP2621636B1 publication Critical patent/EP2621636B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B03C3/743—Cleaning the electrodes by using friction, e.g. by brushes or sliding elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/04—Plant or installations having external electricity supply dry type
    • B03C3/12—Plant or installations having external electricity supply dry type characterised by separation of ionising and collecting stations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/40—Electrode constructions
    • B03C3/41—Ionising-electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/40—Electrode constructions
    • B03C3/45—Collecting-electrodes
    • B03C3/49—Collecting-electrodes tubular

Definitions

  • the invention relates to the collector stage of an electrostatic precipitator.
  • Flue gases from combustion chambers, wood stoves or other wood burning equipment used for heating are treated.
  • the flue gas to be purified is introduced into the ionization stage and flowed through the electric field between a high voltage electrode and a lying at a reference potential, usually ground potential electrode in which the particles are electrically charged via corona discharge at the high voltage electrode.
  • a reference potential usually ground potential electrode in which the particles are electrically charged via corona discharge at the high voltage electrode.
  • the charged particles are deposited there on the surface lying on the reference potential and electrically neutralized, with electrical forces additionally favoring the deposition due to space charge formation from charged particles after leaving the ionization stage and in the collector region.
  • Electrostatic separators are generally used for gas purification.
  • the method of aerosol collection in an electrostatic precipitator with space charge formation is based on the particle charge in a corona discharge and the deposition of unipolar charged particles corresponding to the field of their own space charge.
  • the mechanism of deposition via space charge is described in [1] .
  • the collector of known electrostatic precipitators needs replacement and cleaning, i. Cleaning the sewer or sewer pipe, the tube bundle and the collector chamber. Therefore, the electrostatic precipitator often has to be switched off, opened and closed. This increases the operating costs of the separator. Complicates the removal and installation of the unit as well as the setting of the ionization stage and the collector stage.
  • the object of the invention is to propose a collector stage which avoids the disadvantages and limitations listed.
  • the Effizenz should the particle separation can be increased from the gas stream.
  • a collector stage in which the helical brush is mounted on an axis with a plurality of sections, wherein the sections are arranged offset from one another.
  • the helical brush consists of a plurality of sections offset from each other centrally arranged, sitting coaxially to the collector tube rod or tube on the outer surface radially protruding radially to the coil axis brush wires tuft-like touch with their free end of the collector tube and brush the inner wall upon rotation of the brush , At least the inner wall of the collector tube and the seated therein brush are at a common electrical reference potential, usually ground potential. Therefore, the brush itself acts as a separation surface.
  • the brush is thus a helical brush in several sections.
  • Each of these sections consists of a rod or tube, which is arranged centrally or coaxially to the collector tube in this and on the outer circumferential surface along a helical line tuft-like brush wires protrude.
  • the sections are arranged axially one behind the other in the collector tube, wherein the protruding brush wires touch the inner wall of the collector tube.
  • the sections are rotatable to the collector tube.
  • the sections of the helical brush are offset from each other, ie angularly arranged (twisted arrangement, ie the aforementioned helical line of the helical brush on the lateral surfaces is interrupted by the transition between two sections and runs with an angular offset twisted to the previous section in the subsequent section on.
  • twisted arrangement ie the aforementioned helical line of the helical brush on the lateral surfaces
  • the staggered arrangement of the brush segments in this case has the effect that, as the spiral brush flows through the particle-laden gas, brush elements which serve as separation surfaces enter the flow path of the gas and thus increase the particle separation. This happens without an increase in the differential pressure in the collector tube.
  • the helical brush is made of electrically conductive material, preferably metal or steel wires and is rotated in the collector tube during the gas flow at predetermined intervals, so that the deposited on the inner surface of the respective collector tube and electrically neutralized particles brushed and to the lowest Brushed area of a collector.
  • the self deposited on the helical brush and electrically neutralized Particles fall off by cleaning the brush on the rail to this lowest lying area.
  • Fig.1 schematically shows the collector stage of an electrostatic precipitator.
  • Fig.2 shows three sections of the spiral brush, wherein the axes of the spiral brush sections are arranged offset by 120 °.
  • Fig.1 shows the collector stage of an electrostatic precipitator consisting of an ionization stage 1 and the downstream gas downstream, vertical collector stage. 2
  • the ionization stage 1 is not subject of the invention, but indicated in its contour as a central component of the electrostatic precipitator. In it, indicated by an arrow raw or flue gas is introduced and charged the particles therein in a corona discharge.
  • the collector stage 2 consists here of the one vertical collector tube 3 , in which the coil around the rod or the tube 4 which winds like a vertically wound band 5 coaxial with the axis of the collector tube 3 .
  • the brush wires of the brush 5 are made of an electrically conductive material and their free ends touch the inner collector wall of the collector tube 3 always.
  • the ionization stage precedes the collector stage ( Fig.1 ).
  • the raw or flue gas flows in Fig.1 on the right into the ionization stage 1 and cleanly leaves the collector stage 3 upwards (in Fig.1 represented by two indicated arrows). This means that the raw or flue gas already is ionized by the ionization stage 1 and ionized enters the subsequent collector stage 3 .
  • the rod or tube 4 and thus the helical brush 5 consists as in Fig. 2 shown, from three sections, each offset, that are arranged axially to the collector tube 3 twisted by 120 °.
  • a rigid and parallel to the axis of the collector tube 3 on the inner wall of the collector tube 3 seated rail 6 is shown.
  • the rail 6 which is narrow-side or angularly directed radially to the axis, be an upright standing strip material with a rectangular cross-section or a pointed tube profile with triangular cross-section or a V-shaped angle.
  • a part of the flowing, electrically charged particles form a space charge cloud, with which the electrically charged particles are electrically accelerated toward the inner surface located on the electrical reference potential and deposited thereon upon impact and are electrically neutralized.
  • the electrically charged particles are at the located on an electrical reference potential inside Surface and also lying on a reference potential brush 5 deposited and electrically neutralized.
  • the helical brush 5 is rotated in each collector tube 3 at predetermined intervals, so that brushed off on the inner surface of a collector tube 3 and electrically neutralized particles brushed and brushed to the lowest area of a collector 2 .
  • the self-deposited on the helical brush 5 and electrically neutralized particles fall on the cleaning of the brush 5 on the rail 6 for this to the lowest lying area down.
  • the inner wall of the collector tube 3 is brushed free via the brush 5 and adjusted by the local heat transfer through the collector tube 3 to the environment, a temperature gradient from the center of the collector tube 3 ago.
  • suspended particles are thermophoretically accelerated towards the inner wall of the collector tube 3 via the collector tube in this zone.

Landscapes

  • Electrostatic Separation (AREA)

Claims (3)

  1. Etage collecteur d'un séparateur électrostatique destiné à l'épuration de gaz de fumée issus de processus de combustion, cet étage collecteur (2) comprenant au moins un collecteur (2) réalisé sous la forme d'un tube collecteur (3) ayant une section de passage circulaire dans laquelle est logée, une brosse (5) montée mobile en rotation dans le tube collecteur (3), cette brosse (5) étant une brosse hélicoïdale comprenant un barreau ou un tube (4) monté dans une position centrale coaxialement au tube collecteur (3) et sur la surface enveloppe externe duquel sont positionnés en touffes des fils de brosse s'écartant vers l'extérieur qui viennent en contact avec la paroi interne du tube collecteur (3), en l'effleurant par leur extrémité libre, de sorte que, lors de la rotation de la brosse (5), des particules déposées sur la paroi interne du tube collecteur (3) puissent être évacuées par balayage, un rail (6) étant installé dans le tube collecteur, et le tube collecteur et la brosse étant à un potentiel de référence électrique commun,
    caractérisé en ce que
    le barreau ou le tube (4) monté dans une position centrale coaxialement au tube collecteur (3) est constitué d'au moins deux pièces partielles ayant chacune un segment de brosse, et les pièces partielles sont torsadées angulairement l'une sur l'autre.
  2. Etage collecteur conforme à la revendication 1,
    caractérisé en ce que
    l'angle de torsion α est égal à 360/n degrés, n représentant le nombre de pièces partielles, et le barreau monté dans une position centrale coaxialement au tube collecteur (3) ou le tube (4) monté dans une position centrale coaxialement au tube collecteur (3) étant constitué de n pièces partielles.
  3. Etage collecteur conforme à l'une des revendications 1 et 2,
    caractérisé en ce qu'
    un entraînement manuel ou motorisé est installé au moins sur une face frontale du barreau (4) ou du tube (4).
EP11773384.0A 2010-09-28 2011-09-24 Étage collecteur d'un séparateur électrostatique pour la purification de gaz de fumée formés par des procédés de combustion Not-in-force EP2621636B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010046800A DE102010046800A1 (de) 2010-09-28 2010-09-28 Kollektorstufe eines elektrostatischen Abscheiders zur Reinigung von aus Verbrennungsprozessen entstandenem Rauchgas und Verfahren zum Betreiben
PCT/EP2011/004786 WO2012048794A1 (fr) 2010-09-28 2011-09-24 Étage collecteur d'un séparateur électrostatique pour la purification de gaz de fumée formés par des procédés de combustion

Publications (2)

Publication Number Publication Date
EP2621636A1 EP2621636A1 (fr) 2013-08-07
EP2621636B1 true EP2621636B1 (fr) 2017-05-17

Family

ID=44860283

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11773384.0A Not-in-force EP2621636B1 (fr) 2010-09-28 2011-09-24 Étage collecteur d'un séparateur électrostatique pour la purification de gaz de fumée formés par des procédés de combustion

Country Status (3)

Country Link
EP (1) EP2621636B1 (fr)
DE (1) DE102010046800A1 (fr)
WO (1) WO2012048794A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015204168A1 (de) 2015-03-09 2016-09-15 Kutzner + Weber Gmbh Elektrostatische Partikelabscheidevorrichtung
CN110237934B (zh) * 2019-06-18 2020-07-14 大唐郓城发电有限公司 一种用于火力发电厂的除尘装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2206056A1 (de) * 1972-02-09 1973-08-16 Dortmunder Brueckenbau C H Juc Elektrofilter fuer rauchgase
DE3626002A1 (de) * 1986-07-31 1988-02-04 Erwin Junker Vorrichtung zum reinigen von gasen
DE3707938A1 (de) * 1987-03-12 1988-09-22 Paul J M Haufe Vorrichtung zur aufbereitung, insbesondere filtrierung, der raumluft
JPS6444050U (fr) * 1987-09-10 1989-03-16
DE3927701A1 (de) * 1989-08-25 1991-02-28 Gnii Cvetnych Metallov Gincvet Verfahren und anlage zur reinigung eines gases mit festen und gasfoermigen beimengungen
CH694645A5 (de) 2003-12-01 2005-05-13 Empa Vorrichtung zur elektrostatischen Partikelabscheidung in Gasströmen.
DE102008012151A1 (de) 2008-03-01 2009-09-10 Forschungszentrum Karlsruhe Gmbh Kollektorstufe eines elektrostatischen Abscheiders zur Reinigung von aus Verbrennungsprozessen entstandenem Rauchgas und Verfahren zum Betreiben
DE102008049211B4 (de) 2008-09-27 2011-08-25 Karlsruher Institut für Technologie, 76131 Elektrostatischer Abscheider für die Reinigung von Rauchgasen

Also Published As

Publication number Publication date
EP2621636A1 (fr) 2013-08-07
WO2012048794A1 (fr) 2012-04-19
DE102010046800A1 (de) 2012-03-29

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