EP0973615B1 - Procede de purification d'effluents gazeux de procede charges de poussiere - Google Patents

Procede de purification d'effluents gazeux de procede charges de poussiere Download PDF

Info

Publication number
EP0973615B1
EP0973615B1 EP98912138A EP98912138A EP0973615B1 EP 0973615 B1 EP0973615 B1 EP 0973615B1 EP 98912138 A EP98912138 A EP 98912138A EP 98912138 A EP98912138 A EP 98912138A EP 0973615 B1 EP0973615 B1 EP 0973615B1
Authority
EP
European Patent Office
Prior art keywords
dust
electrostatic filter
wet electrostatic
particles
gas flow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98912138A
Other languages
German (de)
English (en)
Other versions
EP0973615A1 (fr
Inventor
Christof Lanzerstorfer
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.)
Primetals Technologies Austria GmbH
Original Assignee
Voest Alpine Industrienlagenbau GmbH
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 Voest Alpine Industrienlagenbau GmbH filed Critical Voest Alpine Industrienlagenbau GmbH
Publication of EP0973615A1 publication Critical patent/EP0973615A1/fr
Application granted granted Critical
Publication of EP0973615B1 publication Critical patent/EP0973615B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/16—Plant or installations having external electricity supply wet type
    • 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

Definitions

  • the invention relates to a method for cleaning dust-laden process exhaust gases in a wet electrostatic precipitator.
  • the product of the migration speed and the precipitation electrode area (wA) remains as a parameter, i.e. if the migration speed of the dust to be separated is known, the filter, in particular the necessary precipitation electrode area, can be dimensioned.
  • the speed of migration is also dependent on several parameters, such as dust particle size, dust composition and exhaust gas speed.
  • Wet electrostatic precipitators are typically operated at exhaust gas flow rates of 1.5 m / s 2 m / s designed. This results, for example, for the sintering plant dedusting because of the small particle sizes migration speeds on the precipitation electrode surface of approx. 10 cm / s.
  • This low exhaust gas velocity requires an increased effort for Flow distribution devices on the inlet and outlet sides in the filter to even out the Exhaust gas flow. So usually occur within exhaust gas channels before and after the filter Exhaust gas flow rates on the order of about 20 m / s. this means an acceleration on the outlet side of the filter or a deceleration on the inlet side of the filter by a factor of approx. 10-13 each.
  • the object of the invention is now a method for cleaning dust-laden Provide exhaust gases in a wet electrostatic precipitator, which is characterized in that the Exhaust gas flow rate is set to a value so that the highest possible Migration speed occurs and at the same time the disadvantages of the prior art, especially complex flow equalization devices and large Precipitation electrode surfaces can be avoided.
  • wet electrostatic filters are understood to mean both such where the exhaust gas is fully or almost completely saturated with water vapor before entering the filter even those in which the exhaust gas shows a significant undersaturation when entering the filter Has water vapor.
  • the cleaning of the Precipitation electrodes happen by additional water injection.
  • the subject invention which thereby is characterized in that the exhaust gas flow rate to a value of 4 m / s to 9 m / s is set.
  • the exhaust gas flow rate to a value of 4 m / s to 9 m / s is set.
  • the migration speed of the particles increases compared to Migration speeds at current exhaust gas flow speeds of 1.5 m / s to 2 m / s for wet electrostatic precipitators in the case of sintering system dedusting of approximately 10 cm / s over 40 cm / s.
  • the precipitation electrode area and hence the weight of the precipitation electrode in relation to the increase in Migration speed can be reduced. Furthermore, the effort for Flow equalization devices on the inlet and outlet sides of the filter are thus minimized (Deceleration or acceleration only by a factor of approx. 2-5). The Wet electrostatic precipitator is reduced accordingly, which also means the investment costs turn out to be lower.
  • the migration speed increases up to exhaust gas speeds of approx. 6 m / s approximately linear, at higher speeds the curve flattens out noticeable.
  • the range from 4 m / s to 9 m / s according to the invention there are hardly any undesirable effects Drop detachment.
  • FIG. 2 shows cumulative curves 2 of particle size analyzes of in in a coordinate system raw gas dust present in various tests, with the Grain size classes of the gas particles in ⁇ m, and the cumulative ones on the ordinate Concentrations of the respective grain size classes are plotted in percent. Like from the Curves can be seen, the majority of the particles lie in a comb band 0.03 ⁇ m and 4.0 ⁇ m.
  • the dust-laden raw gas originating from a sintering plant is first removed by a Washer led. There is a pre-separation of larger particles (> 16 ⁇ m) and one Enrichment or saturation of the gas with steam instead. The fine separation takes place in the wet electrostatic precipitator described above.

Landscapes

  • Electrostatic Separation (AREA)
  • Treating Waste Gases (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Lasers (AREA)

Claims (6)

  1. Procédé de nettoyage de gaz de procédé, chargés de poussière, contenant de la vapeur d'eau, dans un électrofiltre humide, un dépôt préalable de particules de poussière grossières, en particulier de poussières ayant une grosseur de grain de plus de 16 µm, ainsi qu'un enrichissement ou une saturation des gaz de procédé à l'aide de vapeur d'eau étant effectués dans un laveur, et les gaz ou les particules de poussière qui y sont contenues, qui s'écoulent ensuite à travers l'électrofiltre humide, étant chargés dans un espace entre une ou plusieurs électrodes de pulvérisation et une ou plusieurs électrodes de précipitation et subissant un dépôt sur l'électrode de précipitation ou sur les électrodes de précipitation, caractérisé en ce que la vitesse d'écoulement des gaz de rejet à travers l'électrofiltre humide est réglée à une valeur de 4 m/s à 9 m/s et en ce que l'électrofiltre humide effectue le dépôt de poussière restant tout entier dans le domaine des électrodes de précipitation, qui présentent dans ce but une longueur suffisante.
  2. Procédé selon la revendication 1, caractérisé en ce que la vitesse d'écoulement des gaz de rejet à travers l'électrofiltre humide est réglée à une vitesse de 4,5 m/s à 9 m/s.
  3. Procédé selon la revendication 2, caractérisé en ce que la vitesse d'écoulement des gaz de rejet à travers l'électrofiltre humide est réglée à une valeur de 5 m/s à 9 m/s.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la poussière fine à déposer se compose au moins à raison de 90% de particules d'une grosseur de grain allant jusqu'à 4 µm.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'au moins 80% de la quantité totale des particules de la poussière à déposer sont présents dans une bande de grains de 0,03 µm à 2,0 µm.
  6. Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que l'on utilise, en tant qu'électrode de pulvérisation, une électrode en forme de tige.
EP98912138A 1997-04-11 1998-04-03 Procede de purification d'effluents gazeux de procede charges de poussiere Expired - Lifetime EP0973615B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT0062197A ATA62197A (de) 1997-04-11 1997-04-11 Verfahren zur reinigung von staubbeladenen prozessabgasen
AT62197 1997-04-11
PCT/AT1998/000088 WO1998046359A1 (fr) 1997-04-11 1998-04-03 Procede de purification d'effluents gazeux de procede charges de poussiere

Publications (2)

Publication Number Publication Date
EP0973615A1 EP0973615A1 (fr) 2000-01-26
EP0973615B1 true EP0973615B1 (fr) 2002-07-31

Family

ID=3495450

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98912138A Expired - Lifetime EP0973615B1 (fr) 1997-04-11 1998-04-03 Procede de purification d'effluents gazeux de procede charges de poussiere

Country Status (6)

Country Link
EP (1) EP0973615B1 (fr)
CN (1) CN1252016A (fr)
AT (2) ATA62197A (fr)
AU (1) AU735231B2 (fr)
DE (1) DE59805002D1 (fr)
WO (1) WO1998046359A1 (fr)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3329638A1 (de) * 1983-08-17 1985-03-07 Gottfried Bischoff Bau kompl. Gasreinigungs- und Wasserrückkühlanlagen GmbH & Co KG, 4300 Essen Vorrichtung fuer die entstaubung von industriellen gasen

Also Published As

Publication number Publication date
ATA62197A (de) 2000-07-15
DE59805002D1 (de) 2002-09-05
WO1998046359A1 (fr) 1998-10-22
AU6711698A (en) 1998-11-11
CN1252016A (zh) 2000-05-03
ATE221416T1 (de) 2002-08-15
EP0973615A1 (fr) 2000-01-26
AU735231B2 (en) 2001-07-05

Similar Documents

Publication Publication Date Title
EP0185966B1 (fr) Procédé et dispositif de dépoussiérage d'un courant de gaz contenant des particules solides ou liquides au moyen d'un champ électrique
DE3122515C2 (de) Elektrostatische Filteranordnung
DE1542314C3 (de) Verfahren und Vorrichtung zur Entfernung von Schwefeloxiden aus Abgasen
DE2838159C2 (de) Vorrichtung zum Verteilen eines Gasstromes entlang einem langgestreckten Einlaß einer Gasbehandlungsvorrichtung
EP2042244A2 (fr) Procédé et dispositif destinés à supprimer des poussières et/ou des impuretés en forme de fibres d'un granulé de matière synthétique
AT408843B (de) Staubfilter
DE838676C (de) Filteranlage fuer Gase
DE2307508A1 (de) Elektrische ausfaellvorrichtung
CH636778A5 (de) Verfahren und vorrichtung zur abscheidung von feinstaeuben und aerosolen aus einem gasstrom.
CH623240A5 (fr)
EP0973615A1 (fr) Procede de purification d'effluents gazeux de procede charges de poussiere
EP0594916B1 (fr) Méthode et dispositif pour le nettoyage de surfaces, en particulier de maçonnerie
DE102006033945C5 (de) Steuern der Hochspannung einer Elektroluftfiltervorrichtung
DE102015016554A1 (de) Vorrichtung zum Abscheiden von Overspray, Oberflächenbehandlungsanlage und Verfahren zum Abscheiden von Overspray
DE4018488C1 (en) Removing dust and hazardous materials from waste gases - by sepg. dust in dry multi-cyclone stage, and wet electrostatic precipitator stage
EP0545943B1 (fr) Procede et systeme de separation de particules solides et/ou liquides et/ou gaseaux contenus dans un courant de gas
DE10124871C1 (de) Reinigung von Elektroden eines Elektrofilters
DE2216436A1 (de) Staubfiltervorrichtung
EP0658380A1 (fr) Dispositif pour la séparation de particules de poussière des gaz effluents
EP3025785A2 (fr) Dispositif et procédé de nettoyage de gaz de fumée d'une installation métallurgique
DE2166912A1 (de) Verfahren und anlage zur verbesserung des filtereffektes an filterflaechen
DE10162053B4 (de) Trennverfahren
EP2399660A2 (fr) Séparateur inertiel de particules
AT392421B (de) Verfahren zur abscheidung von aerosolen und feinstaeuben
AT394664B (de) Elektro-schuettschichtfilter-anlage

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19990820

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE DE GB IT

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 20020131

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE DE GB IT

REF Corresponds to:

Ref document number: 221416

Country of ref document: AT

Date of ref document: 20020815

Kind code of ref document: T

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 59805002

Country of ref document: DE

Date of ref document: 20020905

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20021104

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20030506

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20040331

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20040405

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20040408

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20040527

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050403

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050403

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050403

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050430

BERE Be: lapsed

Owner name: *VOEST-ALPINE INDUSTRIEANLAGENBAU G.M.B.H.

Effective date: 20050430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051101

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20050403

BERE Be: lapsed

Owner name: *VOEST-ALPINE INDUSTRIEANLAGENBAU G.M.B.H.

Effective date: 20050430