EP0287137B1 - Sprühelektrode - Google Patents

Sprühelektrode Download PDF

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Publication number
EP0287137B1
EP0287137B1 EP88200422A EP88200422A EP0287137B1 EP 0287137 B1 EP0287137 B1 EP 0287137B1 EP 88200422 A EP88200422 A EP 88200422A EP 88200422 A EP88200422 A EP 88200422A EP 0287137 B1 EP0287137 B1 EP 0287137B1
Authority
EP
European Patent Office
Prior art keywords
corona discharge
section
discharge electrode
tubular cross
electrodes
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
EP88200422A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0287137A3 (en
EP0287137A2 (de
Inventor
Georg Leluschko
Willi Michler
Hermann Koy
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 AT88200422T priority Critical patent/ATE68727T1/de
Publication of EP0287137A2 publication Critical patent/EP0287137A2/de
Publication of EP0287137A3 publication Critical patent/EP0287137A3/de
Application granted granted Critical
Publication of EP0287137B1 publication Critical patent/EP0287137B1/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
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/40—Electrode constructions
    • B03C3/41—Ionising-electrodes

Definitions

  • the invention relates to a self-supporting, mast-like spray electrode for electrostatic dust separators with plate-shaped, gas lanes forming precipitation electrodes.
  • Spray electrodes and precipitation electrodes are the most important components of an electrostatic dust collector. They are coordinated in shape and arrangement. In most cases, the precipitation electrodes are grounded while the spray electrodes are connected to a high voltage source. The dust particles to be separated are ionized by electrons emitted by the spray electrodes and deflected from the gas flow in the electrostatic field existing between spray electrodes and precipitation electrodes and finally deposited on the precipitation electrodes. At certain intervals, the precipitation electrodes in particular, but also the spray electrodes, are shaken by knocking, whereby the deposited dust is released and falls down into the dust collection bunker. The effectiveness of an electrostatic dust collector depends on how well the spray electrodes and precipitation electrodes are matched to their different punctures.
  • Spray electrodes often consist of wires or tapes studded with points that are clamped in a frame.
  • Associated precipitation electrodes are composed of profiled sheet metal strips to form walls of gas passages. Spray electrodes are arranged in the center of the gas lanes and aligned with their tips so that an optimal field for dust separation is formed (cf. DE-OS 3408839).
  • the spray electrodes with wires stretched in frames can only be manufactured up to certain sizes in the workshop. Limits are set by the permissible dimensions during transport. In power plants in particular, however, there is a tendency towards ever larger units, with corresponding effects on the electrostatic dust separators. For example, a 740 MW power plant block requires two electrostatic dust collectors, each approximately 33 m long, 37 m wide and 23 m high. Each separator has a projected precipitation electrode area of around 70,000 m 2 and a total length of the spray electrodes of around 220 km (Z., "Technische Mitteilungen” (1978), number 3, pages 123 to 131).
  • spray electrodes have also become known which consist of relatively rigid components, such as profiled plates, masts or the like (e.g. US Pat. No. 3,435,594, US Pat. No. 4,321,068).
  • the design of the spray electrodes is decisive for the formation of the precipitation electrodes, i.e. the precipitation electrodes are adapted to the spray electrodes and not vice versa, as with the wires stretched in frames. This does not have to be a disadvantage. If, however, precipitation electrodes with an optimal profile shape have been developed for a concept with wires stretched in frames, one would of course also want to use them if the spray electrodes with wires stretched in frames are out of the question.
  • the spray electrode is characterized by the fact that it can be produced practically without material waste from a sheet metal strip, which is given the rigidity required for such spray electrodes by the shape according to the invention and, because of the one-piece design between the supporting parts and the spray tips, does not require any connection points, which experience has shown in multi-part spray electrodes are the cause of high electrical contact resistance and increased risk of corrosion.
  • a section of a mast-like spray electrode is shown in side view and cross section.
  • the spray electrode is made from a sheet metal strip (1) of constant width, in that the sheet metal strip (1) has been formed into an approximately elliptical tube cross section (2).
  • the longitudinal edges (3, 4) of the metal strip (1) are arranged to overlap and are connected to one another.
  • Triangular tabs (5) are bent out of the tube cross-section (2) in such a way that on both sides of the elliptical tube cross-section (2) they form outward-pointing flags (6) in an extension of its main axis (H), the outermost parts of which in the height alternating spray tips (7, 8) represent.
  • These outward-facing flags (6) are cut in the middle and their outermost parts are bent in opposite directions by about 70 ° to form two spray tips (7al7b, 8a / 8b).
  • the length ratio of the main axis (H) to the minor axis (N) of the elliptical tube cross section (2) is expediently in the range 2.4 to 2.7 to 1.
  • the length of the flag (6) is 85 to 90% of the length of the stretched state Main axis (H) of the elliptical tube cross section (2). It is also provided that the greatest distance (A) between the oppositely bent spray tips (8a and 8b) is 30 to 90% of the length of the main axis (H) of the pipe cross section (2).
  • the longitudinal edges (3, 4) are expediently connected to one another by flanging or welding. It is also advantageous if the center distance (T) of the outwardly facing flag (6) is 80 to 85% of the length of the main axis (H) of the pipe cross section (2).
  • the self-supporting, mast-like spray electrode fulfills all the requirements mentioned at the outset. It is particularly advantageous and can be produced practically without any waste of material, the required rigidity being achieved by shaping. It can be continuously produced in any length on appropriate machines, the sequence of punching and forming processes being rationally coordinated.

Landscapes

  • Electrostatic Separation (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Cold Cathode And The Manufacture (AREA)
  • Electroluminescent Light Sources (AREA)
  • Elimination Of Static Electricity (AREA)
  • Lasers (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Holo Graphy (AREA)
EP88200422A 1987-04-15 1988-03-07 Sprühelektrode Expired - Lifetime EP0287137B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88200422T ATE68727T1 (de) 1987-04-15 1988-03-07 Spruehelektrode.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873712726 DE3712726A1 (de) 1987-04-15 1987-04-15 Spruehelektrode
DE3712726 1987-04-15

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP90109095.1 Division-Into 1988-03-07

Publications (3)

Publication Number Publication Date
EP0287137A2 EP0287137A2 (de) 1988-10-19
EP0287137A3 EP0287137A3 (en) 1989-01-11
EP0287137B1 true EP0287137B1 (de) 1991-10-23

Family

ID=6325652

Family Applications (2)

Application Number Title Priority Date Filing Date
EP88200422A Expired - Lifetime EP0287137B1 (de) 1987-04-15 1988-03-07 Sprühelektrode
EP90109095A Expired - Lifetime EP0398236B1 (de) 1987-04-15 1988-03-07 Sprühelektrode

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP90109095A Expired - Lifetime EP0398236B1 (de) 1987-04-15 1988-03-07 Sprühelektrode

Country Status (12)

Country Link
US (1) US4848986A (enrdf_load_stackoverflow)
EP (2) EP0287137B1 (enrdf_load_stackoverflow)
JP (1) JPS63278573A (enrdf_load_stackoverflow)
KR (1) KR880012271A (enrdf_load_stackoverflow)
AT (2) ATE68727T1 (enrdf_load_stackoverflow)
AU (1) AU594295B2 (enrdf_load_stackoverflow)
BR (1) BR8801800A (enrdf_load_stackoverflow)
CA (1) CA1320156C (enrdf_load_stackoverflow)
DE (3) DE3712726A1 (enrdf_load_stackoverflow)
ES (2) ES2036074T3 (enrdf_load_stackoverflow)
IN (1) IN168338B (enrdf_load_stackoverflow)
ZA (1) ZA882670B (enrdf_load_stackoverflow)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3816717A1 (de) * 1988-05-17 1989-11-30 Metallgesellschaft Ag Spruehelektrode fuer elektrostatische staubabscheider
EP0437849A1 (de) * 1990-01-17 1991-07-24 Elex Ag Sprühelektrode in einem elektrostatischen Staubabscheider
US5254155A (en) * 1992-04-27 1993-10-19 Mensi Fred E Wet electrostatic ionizing element and cooperating honeycomb passage ways
EP0629449A3 (de) * 1993-06-18 1995-02-15 Scheuch Alois Gmbh Kompakt-Elektrofilter.
DE19727568C1 (de) * 1997-06-28 1998-05-28 Metallgesellschaft Ag Sprühelektrode für elektrostatische Abscheider und deren Verwendung
CN100525924C (zh) * 2001-10-23 2009-08-12 吉康姆控股公司 发射极
SE520901C2 (sv) * 2001-11-30 2003-09-09 Bact System Ab Emissionselektrod
US6937455B2 (en) 2002-07-03 2005-08-30 Kronos Advanced Technologies, Inc. Spark management method and device
RU2229939C1 (ru) * 2002-12-23 2004-06-10 Закрытое акционерное общество "Кондор-Эко" Элемент коронирующего электрода электрофильтра
RU2234378C1 (ru) * 2003-01-14 2004-08-20 Закрытое акционерное общество "Кондор-Эко" Электрофильтр
US20110056376A1 (en) * 2007-07-12 2011-03-10 Ohio University Low cost composite discharge electrode
RU2448779C1 (ru) * 2010-08-31 2012-04-27 Закрытое акционерное общество "Кондор-Эко" Коронирующий электрод

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE458888C (de) * 1924-09-23 1928-04-25 Siemens Schuckertwerke Akt Ges Spruehelektrode fuer die elektrische Gasreinigung
US2505907A (en) * 1946-10-31 1950-05-02 Research Corp Discharge electrode
GB855621A (en) * 1958-07-24 1960-12-07 Metallgesellschaft Ag Improvements in or relating to electrostatic precipitators
FI41381B (enrdf_load_stackoverflow) * 1960-05-12 1969-07-31 Svenska Flaektfabriken Ab
DE1557148A1 (de) * 1966-10-28 1970-05-27 Metallgesellschaft Ag Plattenfoermige Spruehelektrode fuer elektrostatische Staubabscheider
DE2603514C2 (de) * 1976-01-30 1984-06-07 Metallgesellschaft Ag, 6000 Frankfurt Verfahren und Vorrichtung zum Spannen von Sprühelektroden
GB1575404A (en) * 1977-03-15 1980-09-24 Sturtevant Gas Cleaning Ltd Corona discharge electrodes
AU510540B2 (en) * 1977-08-12 1980-07-03 Hara Keiichi Electrostatic dust precipitator
CA1146092A (en) * 1979-10-11 1983-05-10 Terence B.F. Cottrell Non-welded discharge electrode
GB2070979A (en) * 1980-02-25 1981-09-16 Lodge Cottrell Ltd Discharge electrodes for electrostatic precipitators
US4375364A (en) * 1980-08-21 1983-03-01 Research-Cottrell, Inc. Rigid discharge electrode for electrical precipitators
US4521229A (en) * 1983-11-01 1985-06-04 Combustion Engineering, Inc. Tubular discharge electrode for electrostatic precipitator
DE3408839A1 (de) * 1984-03-10 1985-09-12 Metallgesellschaft Ag, 6000 Frankfurt Niederschlagselektrode fuer staubabscheider
SE452855B (sv) * 1985-01-28 1987-12-21 Flaekt Ab Emissionselektrod

Also Published As

Publication number Publication date
ATE68727T1 (de) 1991-11-15
ZA882670B (en) 1989-12-27
ES2026993T3 (es) 1992-05-16
EP0398236B1 (de) 1992-11-19
ATE82528T1 (de) 1992-12-15
BR8801800A (pt) 1988-11-16
DE3876104D1 (en) 1992-12-24
AU594295B2 (en) 1990-03-01
CA1320156C (en) 1993-07-13
DE3865722D1 (en) 1991-11-28
EP0287137A3 (en) 1989-01-11
EP0398236A1 (de) 1990-11-22
DE3712726A1 (de) 1988-11-10
JPS63278573A (ja) 1988-11-16
US4848986A (en) 1989-07-18
EP0287137A2 (de) 1988-10-19
ES2036074T3 (es) 1993-05-01
KR880012271A (ko) 1988-11-26
IN168338B (enrdf_load_stackoverflow) 1991-03-16
AU1462888A (en) 1988-10-20

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