EP1286779B1 - Depoussiereur electrostatique - Google Patents

Depoussiereur electrostatique Download PDF

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Publication number
EP1286779B1
EP1286779B1 EP01943449A EP01943449A EP1286779B1 EP 1286779 B1 EP1286779 B1 EP 1286779B1 EP 01943449 A EP01943449 A EP 01943449A EP 01943449 A EP01943449 A EP 01943449A EP 1286779 B1 EP1286779 B1 EP 1286779B1
Authority
EP
European Patent Office
Prior art keywords
housing
dust separator
gas
electrostatic dust
section
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
EP01943449A
Other languages
German (de)
English (en)
Other versions
EP1286779A1 (fr
Inventor
Philipp Gittler
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
Siemens VAI Metals Technologies GmbH and Co
Siemens VAI Metals Technologies GmbH Austria
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=3683868&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1286779(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens VAI Metals Technologies GmbH and Co, Siemens VAI Metals Technologies GmbH Austria filed Critical Siemens VAI Metals Technologies GmbH and Co
Priority to AT01943449T priority Critical patent/ATE435071T1/de
Publication of EP1286779A1 publication Critical patent/EP1286779A1/fr
Application granted granted Critical
Publication of EP1286779B1 publication Critical patent/EP1286779B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B03C3/36—Controlling flow of gases or vapour
    • 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
    • B03C3/011—Prefiltering; Flow controlling
    • 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
    • B03C3/019—Post-treatment of gases
    • 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
    • B03C3/82—Housings

Definitions

  • the invention relates to an electrostatic dust collector for horizontal gas passage, with a housing substantially rotationally symmetrical to a central housing axis.
  • Such electrostatic precipitators are known in the art and typically have vertical plate-shaped collecting electrodes arranged equidistant from each other parallel to the main axis of the housing.
  • the collecting electrodes are arranged at equidistant intervals parallel to the main axis of the housing, which extends in accordance with the respective chord line length substantially over the entire available height.
  • tensioned discharge electrodes are provided in frame.
  • scratching devices may be provided, for example around the housing axis via the lower area of the housing wall provided with dust discharge openings, pivotable scraper devices.
  • Such a dust separator is from the EP 0 252 371 A1 known.
  • This dust collector has an inlet and outlet nozzle, each formed by 3 different conical sections, the conical sections are in certain size and height ratios to the housing diameter of the dust collector.
  • In the middle conical section three gas distribution perforated plates are arranged.
  • Dust collectors of this type are used for dry dedusting of industrial useful and exhaust gases, especially when it comes to permanently or temporarily explosive gas mixtures.
  • top gases from blast furnaces which operate at an overpressure of 1.5 to 2.5 bar, dedusted in this way to relax without erosion risk for energy recovery in turbines at 40 to 80 mbar, previously the dust content to 5 must be reduced to 20 mg / m 3 .
  • electrostatic precipitators with a pressure loss of 1 to 2 mbar come into consideration, because in the separation efficiency equivalent high-performance scrubbers have a pressure drop of 200 to 400 mbar.
  • coal pulverizers Another field of application for such dust are coal pulverizers whose exhaust gases are explosive because of the coal dust content within certain limits. Uncontrolled changes in the gas composition due to the build-up of coal dust deposits or the ingress of false air must be avoided in any case.
  • the electrostatic dust collector is provided with an expanding into a single conical section to 80 to 95% of the housing diameter inlet nozzle, the remaining extension of 5 to 20% of the housing diameter in Is formed of a step which is carried out substantially perpendicular and radially symmetrical to the housing axis, with at least two arranged in the conical section Gasver notoriousslochblechen, which are arranged substantially perpendicular to the housing axis.
  • the electrostatic precipitator continues to not tend to deflagration, but that the separation efficiency is increased compared to the dust separator known from the prior art.
  • the increase in the separation efficiency is based on a gas velocity profile which is largely uniformized over the cross section of the stucco separator, as a result of which the residence time distribution is likewise uniform. While these factors affect the ongoing operation of the electrostatic precipitator, a simpler and more cost-effective production is possible due to the simple construction of the dust collector according to the invention with only a single cone and a stage. Furthermore, it is also possible to convert existing dust separators into dust collectors according to the invention quickly and with little cost.
  • a cylindrical section is provided between the conical section and the step-shaped extension, wherein the height (h 1 ) of the cylindrical section is 5 to 15%, preferably about 10% of the housing diameter D.
  • the height h 2 of the conical section is in a certain size ratio to the housing diameter.
  • a height h 2 of the conical section of 20 to 40% of the housing diameter has proven to be particularly advantageous.
  • the post-ion x 1 obey to x 3 of the gas distribution perforated plates the following relationship, wherein x 1 is measured to x 3 along the housing axis, from the cross sectional plane of the stepped recess that is, from the transition stage / cone or step / cylindrical portion, opposite to the gas flow direction:
  • the gas outlet side of the housing includes a stepped taper to 80 to 95% of the housing diameter, which taper is executed substantially perpendicular and radially symmetrical to the housing axis.
  • step-shaped taper adjoins a conically tapering section in a single section, with at least one arranged in the conical section Gasver Collinsslochblech, which are arranged substantially perpendicular to the housing axis and wherein the height ( h 4 ) of the conical section 20 to 40% of the housing diameter D.
  • a cylindrical section is arranged between step-shaped taper and outlet connection, the height ( h 3 ) of the cylindrical section being 5 to 15% of the housing diameter D.
  • three gas distribution hole plates are provided in the conical section of the outlet nozzle, wherein the gas permeability of the gas distribution hole plates in the gas flow direction of 41-45% to 44- 48% and then to 47 51% increases / decreases.
  • the inlet and outlet nozzles are the same, but symmetrically symmetrical.
  • inlet and outlet nozzles each arranged between the conical section and step-shaped extension cylindrical portion and three each in the respective conical part arranged gas distribution hole plates.
  • FIG. 1 schematically an inlet nozzle 1 for a dust collector according to the invention with a substantially cylindrical housing 2 and a central housing axis 3 is shown.
  • the inlet port 1 expands in a single conical section 10 to about 90% of the diameter D of the housing 2 of the dust collector and the height h 2 of the conical section 10 is about 35% of the housing diameter D.
  • At the conical portion 10 includes a cylindrical section. 4 whose height h 1 is about 5% of the housing diameter D.
  • the remaining 10% of the diameter extension of the housing diameter D are formed in the form of a stepped, radially symmetrical recess 5.
  • FIG. 2 schematically, an inventive dust collector 8 is shown with an inlet nozzle 1, a housing 2 and an outlet nozzle 9, wherein the arrow 7 again illustrates the gas flow direction.

Landscapes

  • Electrostatic Separation (AREA)
  • Cyclones (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

L'invention concerne un dépoussiéreur électrostatique (8) pour un passage de gaz horizontal, comportant un boîtier (2) sensiblement à symétrie de révolution par rapport à un axe de boîtier central (3), ainsi qu'un raccord d'entrée (1) dont le diamètre s'élargit dans une seule partie conique (10) pour atteindre une valeur représentant 80 à 95 % du diamètre (D) du boîtier. L'élargissement de diamètre restant, représentant 5 à 20 % du diamètre (D) du boîtier, se présente sous la forme d'un gradin (5) pratiquement perpendiculaire et à symétrie radiale par rapport à l'axe de boîtier (3). Ce dépoussiéreur électrostatique comprend également au moins deux tôles perforées (6, 6', 6') servant à la répartition du gaz, placées dans la partie conique (10), de façon pratiquement perpendiculaire à l'axe de boîtier (3).

Claims (10)

  1. Dépoussiéreur électrostatique (8) pour passage de gaz horizontal, avec un boîtier (2) présentant essentiellement la symétrie de révolution par rapport à un axe central (3) du boîtier et comportant un tuyau d'entrée (1) de forme conique, et avec au moins deux tôles perforées de distribution du gaz (6, 6', 6") disposées dans le tuyau d'entrée (1), qui sont essentiellement perpendiculaires à l'axe (3) du boîtier, caractérisé par la combinaison des caractéristiques suivantes: avec un tuyau d'entrée (1) s'évasant en une seule section conique (10) jusque 80 à 95 % du diamètre de boîtier (D), dans lequel le reste de l'élargissement de 5 à 20 % du diamètre de boîtier (D) est réalisé sous la forme d'un épaulement (5), qui est essentiellement perpendiculaire et radialement symétrique à l'axe (3) du boîtier.
  2. Dépoussiéreur électrostatique (8) selon la revendication 1, caractérisé en ce qu'il est prévu une section cylindrique (4) entre la section conique (10) et l'élargissement en forme d'épaulement (5).
  3. Dépoussiéreur électrostatique (8) selon la revendication 2, caractérisé en ce que la hauteur (h1) de la section cylindrique (4) vaut 5 à 15 %, de préférence environ 10 %, du diamètre de boîtier (D).
  4. Dépoussiéreur électrostatique (8) selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la hauteur (h2) de la section conique (10) vaut 20 à 40 % du diamètre de boîtier (D).
  5. Dépoussiéreur électrostatique (8) selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'il est prévu au moins trois tôles perforées de distribution du gaz (6, 6', 6") dans la section conique (10).
  6. Dépoussiéreur électrostatique (8) selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'il est prévu au moins trois tôles perforées de distribution du gaz (6, 6', 6") dans la section conique (10) du tuyau d'entrée (1), dans lequel la perméabilité au gaz des tôles perforées de distribution du gaz (6, 6', 6") dans la direction d'écoulement du gaz (7) est réalisée de façon croissante/décroissante de 51-47 % à 48-44 % et ensuite à 45-41 %.
  7. Dépoussiéreur électrostatique (8) selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'un rétrécissement en forme d'épaulement du boîtier (2) jusque 80 à 95 % du diamètre de boîtier (D) se raccorde au côté de sortie des gaz du boîtier (2), rétrécissement qui est essentiellement perpendiculaire et radialement symétrique à l'axe (3) du boîtier.
  8. Dépoussiéreur électrostatique (8) selon la revendication 7, caractérisé en ce qu'une section de rétrécissement de forme conique se raccorde en une seule section au rétrécissement en forme d'épaulement, avec au moins deux tôles perforées de distribution du gaz disposées dans la section conique, qui sont disposées essentiellement perpendiculairement à l'axe du boîtier et dans lequel la hauteur (h4) de la section conique vaut 20 à 40 % du diamètre de boîtier (D).
  9. Dépoussiéreur électrostatique (8) selon la revendication 8, caractérisé en ce qu'une section cylindrique est disposée entre le rétrécissement en forme d'épaulement et un tuyau de sortie, dans lequel la hauteur (h3) de la section cylindrique vaut 5 à 15 % du diamètre de boîtier (D).
  10. Dépoussiéreur électrostatique (8) selon l'une quelconque des revendications 7 à 9, caractérisé en ce qu'il est prévu trois tôles perforées de distribution du gaz dans la section conique du tuyau de sortie, dans lequel la perméabilité au gaz des tôles perforées de distribution du gaz dans la direction d'écoulement du gaz est réalisée de façon croissante/décroissante de 41-45 % à 44-48 % et ensuite à 47-51 %.
EP01943449A 2000-06-06 2001-05-25 Depoussiereur electrostatique Expired - Lifetime EP1286779B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT01943449T ATE435071T1 (de) 2000-06-06 2001-05-25 Elektrostatischer staubabscheider

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT0099000A AT409347B (de) 2000-06-06 2000-06-06 Elektrostatischer staubabscheider
AT9902000 2000-06-06
PCT/EP2001/006020 WO2001094023A1 (fr) 2000-06-06 2001-05-25 Depoussiereur electrostatique

Publications (2)

Publication Number Publication Date
EP1286779A1 EP1286779A1 (fr) 2003-03-05
EP1286779B1 true EP1286779B1 (fr) 2009-07-01

Family

ID=3683868

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01943449A Expired - Lifetime EP1286779B1 (fr) 2000-06-06 2001-05-25 Depoussiereur electrostatique

Country Status (11)

Country Link
US (1) US7022166B2 (fr)
EP (1) EP1286779B1 (fr)
KR (1) KR100735174B1 (fr)
CN (1) CN100342976C (fr)
AT (2) AT409347B (fr)
AU (1) AU2001266026A1 (fr)
BR (1) BR0111523B1 (fr)
CA (1) CA2411777A1 (fr)
DE (1) DE50114960D1 (fr)
NO (1) NO20025721L (fr)
WO (1) WO2001094023A1 (fr)

Families Citing this family (14)

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CN101318160A (zh) * 2007-06-08 2008-12-10 袁野 一种应用于电除尘器中的消风装置
CN102006939A (zh) * 2008-02-11 2011-04-06 亚达帕丽·空达拉·姚 用于收集作业中产生的杂质的真空泵吸滤装置
US8038776B2 (en) * 2008-03-12 2011-10-18 Bha Group, Inc. Apparatus for filtering gas turbine inlet air
US7695551B2 (en) * 2008-03-12 2010-04-13 Bha Group, Inc. Apparatus for filtering gas turbine inlet air
US7527674B1 (en) * 2008-03-12 2009-05-05 Bha Group, Inc. Apparatus for filtering gas turbine inlet air
EP2433712A1 (fr) * 2010-09-27 2012-03-28 Alstom Technology Ltd Agencement de transition de conduite
US8236092B1 (en) * 2011-06-27 2012-08-07 Richards Clyde N Pressure gradient gas scrubber apparatus and method
US9039815B2 (en) 2011-08-10 2015-05-26 John P. Dunn Vane electrostatic precipitator
US9073062B2 (en) * 2011-08-10 2015-07-07 John P. Dunn Vane electrostatic precipitator
US9238230B2 (en) 2011-08-10 2016-01-19 John P. Dunn Vane electrostatic precipitator
CN106733179A (zh) * 2017-01-09 2017-05-31 广东工业大学 一种静电除尘霾装置
CN109706555A (zh) * 2019-02-25 2019-05-03 安徽华茂纺织股份有限公司 筵棉输送管道除杂装置
CN111530630A (zh) * 2020-06-03 2020-08-14 中国华电科工集团有限公司 一种均布板、湿式电除尘器及烟气排放装置
CN112981034A (zh) * 2021-02-09 2021-06-18 鞍钢股份有限公司 一种提高转炉静电除尘器除尘效率的方法

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Also Published As

Publication number Publication date
KR100735174B1 (ko) 2007-07-03
ATE435071T1 (de) 2009-07-15
US20030159585A1 (en) 2003-08-28
BR0111523B1 (pt) 2014-09-09
AU2001266026A1 (en) 2001-12-17
CA2411777A1 (fr) 2002-12-02
CN1444510A (zh) 2003-09-24
NO20025721D0 (no) 2002-11-28
EP1286779A1 (fr) 2003-03-05
DE50114960D1 (de) 2009-08-13
US7022166B2 (en) 2006-04-04
ATA9902000A (de) 2001-12-15
AT409347B (de) 2002-07-25
WO2001094023A1 (fr) 2001-12-13
NO20025721L (no) 2003-01-24
KR20030007879A (ko) 2003-01-23
BR0111523A (pt) 2003-07-22
CN100342976C (zh) 2007-10-17

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