EP0252371B1 - Elektrostatischer Staubabscheider - Google Patents

Elektrostatischer Staubabscheider Download PDF

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Publication number
EP0252371B1
EP0252371B1 EP87109099A EP87109099A EP0252371B1 EP 0252371 B1 EP0252371 B1 EP 0252371B1 EP 87109099 A EP87109099 A EP 87109099A EP 87109099 A EP87109099 A EP 87109099A EP 0252371 B1 EP0252371 B1 EP 0252371B1
Authority
EP
European Patent Office
Prior art keywords
housing
gas
section
cross
electrostatic precipitator
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
EP87109099A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0252371A1 (de
Inventor
Wilhelm Leussler
Franz Hauss
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
Priority to AT87109099T priority Critical patent/ATE50436T1/de
Publication of EP0252371A1 publication Critical patent/EP0252371A1/de
Application granted granted Critical
Publication of EP0252371B1 publication Critical patent/EP0252371B1/de
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
    • 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
    • B03C3/72—Emergency control systems
    • 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
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/82—Housings
    • 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
    • B03C3/88—Cleaning-out collected particles

Definitions

  • the invention relates to an electrostatic dust separator for horizontal gas passage, in which vertical plate-shaped precipitation electrodes are arranged at equidistant intervals parallel to the main axis of the housing in a cylindrical, pressure-resistant housing, which extend according to the respective chord length substantially over the entire available height, and in which spray electrodes which are clamped in the frame between the precipitation electrodes are provided, and scraping devices which can be pivoted about the housing axis via the lower region of the housing wall provided with dust discharge openings.
  • Such a dust collector is known from DE-PS 19 00 526.
  • it largely fulfills the requirement for the fullest possible use of the available flow cross-section and for the avoidance of flow-free spaces with regard to an explosion risk when exposed to alternating exposure to combustible and non-combustible gases. Nevertheless, malfunctions due to deflagrations and slight gas explosions occasionally occurred, the causes of which could not be identified at first.
  • Dust collectors of this type are used for the dry dedusting of industrial useful and exhaust gases, especially if it is a permanently or temporarily explosive gas mixture.
  • top gases from blast furnaces that work with an overpressure of 1.5 to 2.5 bar are dedusted in this way in order to relax them to 40 to 80 mbar without risk of erosion for energy recovery in turbines, the dust content previously being 5 must be reduced to 20 mg / m 3 .
  • electrostatic filters with a pressure loss of I to 2 mbar can be considered, because high-performance scrubbers of equivalent quality have a pressure loss of 200 to 400 mbar in the separation capacity.
  • the dedusting of exhaust gases from steel converters is also particularly critical because, due to the discontinuous mode of operation, flammable gases alternate and the ambient air is only slightly mixed with dust and gases. After dedusting, the flammable gases are collected in containers or fed into gas supply systems, while the gases occurring intermittently outside the actual blowing phases of the converter are released into the atmosphere via a chimney after dedusting.
  • a switchover device downstream of the dust separator is used for this purpose, which is controlled in time or as a function of the gas composition. This switchover device, the converter and also deflagrations upstream from the dust separator can initiate pressure surges in the gas flow, through which dust accumulations in the dust separator or in the upstream duct system can be detached and swirled in the gas flow. Such "dust impacts" on the one hand impair the separation performance of the dust separator and on the other hand are associated with an increased risk of deflagration.
  • Deflagrations can also be triggered in dust separators for converter exhaust gases if, at critical moments, false air intakes occur or if pressure surges reactivate parts of the flow system that were previously dead due to the unfavorable design and in which gas volumes of an undefined composition had accumulated. It is obvious that all the precautions are taken to ensure the safe separation of the different gas qualities flowing through the dust separator in alternation.
  • the gas distribution perforated plate which is arranged in the plane of the diameter d 2 , expediently has a cross section of 52 to 60%, preferably 56%, while the other two gas distribution perforated plates have a free cross section of 54 to 62%, preferably 58% should. Furthermore, it is provided that a closed dust collecting duct with a mechanical conveying device and with transverse webs is arranged under the dust discharge openings, through which the dust discharge openings are sealed off from one another on the gas side. Finally, it is provided that, in order to compensate for pressure surges, the gas distribution perforated plates have sections which are movably suspended and can swing up against the gas flow direction.
  • the electrostatic dust separator for horizontal gas passage according to FIG. I has a cylindrical pressure-resistant housing (I) which rests on the foundation via supports (19).
  • this housing (I) vertical plate-shaped precipitation electrodes (2) are arranged at equidistant intervals parallel to the main axis of the housing (I), which essentially extend over the entire available height in accordance with the respective chord length.
  • Spray electrodes (3) tensioned in frames (15) are provided between the precipitation electrodes (2).
  • the electrostatic dust separator has scraper devices (6) which can be pivoted about the housing axis via the lower region of the housing wall (5) provided with dust discharge openings (4).
  • the cylindrical housing (I) is connected to an inlet connection (7) which widens in three conical sections (a, b, c) from the cross section of the gas supply line to the at least 10 times larger cross section of the cylindrical housing (I) and in its middle conical section (b) has three gas distribution perforated plates (8a to 8c).
  • an outlet connection (9) is provided, which narrows in three conical sections (c, b, a) from the cross section of the cylindrical housing (I) to the cross section of the gas discharge line, which is at most 1/10 thereof.
  • a pressure relief flap (10) is provided on the inlet connection (7).
  • a closed dust collecting duct (11) with a mechanical conveyor (12) and with transverse webs (13) through which the dust discharge openings (4) are sealed off from one another on the gas side (see also FIG. 3).
  • the spray electrodes (3) are tensioned in frames (15), which in turn are mounted in the housing (I) via support devices (17) and insulators (16).
  • the scraper device (6) is rotatably mounted in transverse webs (18). Circular ribs (20) are also provided to stiffen the housing (I).
  • the spray electrodes (3) While the grounded precipitation electrodes (2) are suspended directly in the housing (I), the spray electrodes (3), which are connected to high voltage and are clamped in frames, are removed via support devices (17) and insulators (16).
  • the housing (I) reinforced by ribs (20) in turn rests on the foundations via the supports (19)
  • the dust discharge openings (4) can be clearly seen, which are arranged in the lower part of the housing (I), which together with the inlet and outlet nozzle (7,9) determines the outer contour of the electrostatic dust separator.
  • the conveyor device (12) arranged in the dust collecting duct (11) is shown in simplified form. It essentially consists of an endless circulating chain (22) to which scrapers (21) extending transversely to the conveying direction are fastened. The chain is mounted on laterally arranged webs (23) and is moved by means of a drive, not shown.
  • the dust emerging downward through the dust discharge openings (4) is conveyed to the right by means of the scrapers (21) attached to the chain (22) and ultimately discharged from the dust collecting duct (not shown). Between the upper and lower run of the chain there are also transverse webs (13) in the dust collecting duct, so that in connection with the dust filling in the dust collecting duct and the scrapers (21) the dust discharge opening (4) is sealed off from one another on the gas side.
  • the gas distribution plate (8) according to Figure 4 has a number of sections (14) which are suspended in such a way that they are held in a vertical position by the normal gas flow against stops, but in the event of a sudden pressure increase in the electrostatic dust separator Can level off the gas flow direction and thus ensure a rapid reduction in pressure (see side view).
  • FIG. 5 shows how the gas passage openings in the gas distribution perforated plate can expediently be designed.
  • FIG. 6 shows the dust separator with housing (I), inlet and outlet nozzle (7, 9) once again in simplified form in order to illustrate the gradation of the diameter d or the height h of the individual conical parts, which is important according to the invention. It can be seen from this that the inlet and outlet connections (7, 9) can be designed essentially in the same way within the scope of the conditions specified in claims 4 and 5.
  • FIG. 7 once again indicates how the gas distribution perforated plates (8a to 8c) are arranged in the middle section (b) of the inlet connector. Thereafter, the gas distribution perforated plates (8a and 8c) are each arranged approximately in the smallest and largest diameter of this section (b), while the gas distribution perforated plate (8b) lies exactly between them, so that there are equally large gaps between the gas distribution perforated plates in the gas flow direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Electrostatic Separation (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Filtering Materials (AREA)
EP87109099A 1986-07-05 1987-06-24 Elektrostatischer Staubabscheider Expired - Lifetime EP0252371B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87109099T ATE50436T1 (de) 1986-07-05 1987-06-24 Elektrostatischer staubabscheider.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3622699 1986-07-05
DE19863622699 DE3622699A1 (de) 1986-07-05 1986-07-05 Elektrostatischer staubabscheider

Publications (2)

Publication Number Publication Date
EP0252371A1 EP0252371A1 (de) 1988-01-13
EP0252371B1 true EP0252371B1 (de) 1990-02-21

Family

ID=6304523

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87109099A Expired - Lifetime EP0252371B1 (de) 1986-07-05 1987-06-24 Elektrostatischer Staubabscheider

Country Status (12)

Country Link
EP (1) EP0252371B1 (cs)
JP (1) JPS6323759A (cs)
KR (1) KR950002794B1 (cs)
CN (1) CN1014497B (cs)
AT (1) ATE50436T1 (cs)
AU (1) AU590095B2 (cs)
BR (1) BR8703402A (cs)
DD (1) DD260874A5 (cs)
DE (2) DE3622699A1 (cs)
IN (1) IN165150B (cs)
PL (1) PL152427B1 (cs)
RU (1) RU1809782C (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106622664A (zh) * 2017-01-09 2017-05-10 浙江万源环保机械科技有限公司 电除尘器

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3211032B2 (ja) * 1991-08-02 2001-09-25 株式会社エルデック 電気集塵装置
AT409347B (de) * 2000-06-06 2002-07-25 Voest Alpine Ind Anlagen Elektrostatischer staubabscheider
DE102010021233A1 (de) 2009-07-10 2011-01-13 Sms Elex Ag Elektrofilter
DE102009060254A1 (de) * 2009-07-10 2011-01-13 Sms Elex Ag Elektrofilter
DE102015117584A1 (de) * 2015-10-15 2017-04-20 Rwe Power Ag Verfahren und Vorrichtung zum Filtern von Kohlenstäuben aus dem Abdampf der Kohletrockung
CN105797856B (zh) * 2016-04-01 2017-11-28 长兴友邦电器有限公司 一种带通讯及监测功能的高压静电除尘装置
CN105674428B (zh) * 2016-04-08 2018-06-22 宁德深蓝科技环保有限公司 一种小型空气净化器
CN110180678B (zh) * 2019-05-27 2021-01-15 北京圣喻环保科技有限公司 一种油烟净化除菌设备
CN114189130B (zh) * 2022-02-15 2022-05-13 武汉尚科从信科技有限公司 一种光伏发电并网逆变器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU33429A1 (cs) *
DE520710C (de) * 1925-01-14 1931-03-13 Siemens Schuckertwerke Akt Ges Vorrichtung zur Aufteilung des in eine elektrische Reinigungskammer eintretenden Gasstromes
DE1256201B (de) * 1961-01-07 1967-12-14 Metallgesellschaft Ag Elektrostatischer Abscheider mit am Gaseinlass angeordneter Gasverteilungseinrichtung
DE1296610B (de) * 1966-10-28 1969-06-04 Metallgesellschaft Ag Klappenlochblech vor oder nach einem diffusorartigen Einlassstutzen am Eingang elektrostatischer Staubabscheider
DE1900526B2 (de) * 1969-01-07 1971-12-30 Metallgesellschaft Ag, 6000 Frankfurt Elektrostatischer staubabscheider

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106622664A (zh) * 2017-01-09 2017-05-10 浙江万源环保机械科技有限公司 电除尘器
CN106622664B (zh) * 2017-01-09 2017-11-10 浙江万源环保机械科技有限公司 电除尘器

Also Published As

Publication number Publication date
PL266621A1 (en) 1988-07-21
AU590095B2 (en) 1989-10-26
AU7509587A (en) 1988-01-07
DE3761721D1 (de) 1990-03-29
RU1809782C (ru) 1993-04-15
JPS6323759A (ja) 1988-02-01
ATE50436T1 (de) 1990-03-15
BR8703402A (pt) 1988-03-22
JPH0221864B2 (cs) 1990-05-16
DE3622699A1 (de) 1988-01-14
EP0252371A1 (de) 1988-01-13
DD260874A5 (de) 1988-10-12
IN165150B (cs) 1989-08-19
CN87104610A (zh) 1988-03-23
KR950002794B1 (ko) 1995-03-27
CN1014497B (zh) 1991-10-30
PL152427B1 (en) 1990-12-31
KR880001332A (ko) 1988-04-22

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