EP0155713B1 - Niederschlagselektrode für Staubabscheider - Google Patents

Niederschlagselektrode für Staubabscheider Download PDF

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Publication number
EP0155713B1
EP0155713B1 EP85200160A EP85200160A EP0155713B1 EP 0155713 B1 EP0155713 B1 EP 0155713B1 EP 85200160 A EP85200160 A EP 85200160A EP 85200160 A EP85200160 A EP 85200160A EP 0155713 B1 EP0155713 B1 EP 0155713B1
Authority
EP
European Patent Office
Prior art keywords
portions
metal strips
parallel
sheet metal
collecting electrode
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
Application number
EP85200160A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0155713A1 (de
Inventor
Helmut Gilles
Wilhelm Leussler
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
Publication of EP0155713A1 publication Critical patent/EP0155713A1/de
Application granted granted Critical
Publication of EP0155713B1 publication Critical patent/EP0155713B1/de
Expired 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
    • B03C3/45—Collecting-electrodes
    • B03C3/51—Catch- space electrodes, e.g. slotted-box form

Definitions

  • the invention relates to a precipitation electrode for a horizontally flowed electrostatic dust separator, in which sheet metal strips with an essentially W-shaped cross section are connected to vertically hanging walls forming gas passages, and in the sheet metal strips between the sections inclined in an alternating direction to the gas flow direction parallel to the gas flow direction extending sections are provided, the edge-side sections also run parallel to the gas flow direction and are bent at the ends to form U-shaped hooking strips by 180 ° C and the angle between the inclined sections of the sheet metal strips and the parallel sections is at least 150 ° (see DE-A -1 407 529).
  • Such sheet metal strips and precipitation electrodes are known for dry-working electrostatic dust separators. They often have mutually and symmetrically arranged dust traps (ver. DE-AS 11 07 203, DE-GM 18 48 928) and are often designed on the vertical longitudinal edges so that two successive metal strips can be hooked together (see. DE-OS 1771 478, DE-GM 18 51 222, DE-GM 18 69 720, AT-PS 277 400, CH-PS 486 920).
  • the known precipitation electrodes at the lower end are to be partially directly attached to the knock linkage (DE-GM 1851 222), which thus also serves as a cross connection. Further relevant details have become known from the following publications: DE-PS 316 7-03, DE-OS 1407529, DE-OS 33 20 360, EP-PS 14 273, FR-PS 21 26068 and US-PS 32 82 029.
  • the known sheet metal strips and precipitation electrodes still have various disadvantages.
  • the spray electrodes are only opposed to dust collecting spaces on one side, so that these are expediently also provided with spray tips only on one side.
  • the precipitation electrode surfaces which are not confronted by a spray tip, are therefore less efficient for dust separation and, when the precipitation electrodes are cleaned by knocking, cause a considerable re-whirling up of the already separated dust, which is then largely discharged with the gas stream and adversely affects the efficiency of the dust separator.
  • due to the required precise alignment of the spray tips on the dust collection spaces during assembly must be carried out very carefully, because if the spray tips are incorrectly aligned, the separation performance inevitably drops to a fraction of the normal performance.
  • the main disadvantage is the strong deformation of the material when profiling.
  • material hardening cannot be avoided, which in continuous operation leads to the formation of cracks due to dynamic stress caused by knocking during cleaning.
  • the electrode strips according to the publications mentioned can be non-positively connected to the knock linkage at the lower end (as shown in DE-GM 1851 222), but the connection of the individual electrode strips at the vertical longitudinal edges by hooking is not sufficient for continuous operation with temperature fluctuations, especially with the large electrode lengths common today.
  • the design of the precipitation electrodes is also intended to achieve a current density distribution that is as uniform as possible, as can ideally only be achieved with tubular precipitation electrodes with a centrally arranged spray electrode. It is precisely in this point that the known precipitation electrodes still have considerable defects.
  • the sheet metal strips for the precipitation electrodes should also be as economical as possible to produce, not have any strongly profiled points that tend to stress corrosion cracking, have the best possible ratio of effective separation area to material expenditure and be easy to assemble and repair or replace.
  • a cross-sectional shape is to be proposed for the sheet metal strips, which is easy to profile with a high degree of dimensional accuracy, in which, depending on the inlet width of the sheet metal strips or the profiling system, any number of dust collection spaces can be arranged in a row, which enables an optimal electrical field distribution and also ensures secure hooking allowed the vertical longitudinal edges.
  • the electrodes should be usable for large gas aisle distances and field heights of up to 15 m and more, have a high transverse and longitudinal rigidity and allow easy and quick installation.
  • the individual sheet metal strips should be able to be connected rigidly and non-positively to the knocking linkage at the lower end, have effective dust-collecting spaces and their shape should be adapted to the requirements of flow technology, the optimal field line distribution and the vibration behavior when cleaning.
  • the electrical field distribution should be as homogeneous and uniform as possible in order to be able to achieve the highest possible operating voltage, as a result of which the degree of separation of an electrostatic dust separator is essentially determined. At high field densities, electrical arcing occurs, which limits the operating voltage and reduces the degree of separation.
  • FIG. 1 a part of a gas lane of a dust collector is shown, which is formed by two adjacent precipitation electrodes.
  • the center plane of the precipitation electrodes is designated 4.
  • Spray electrodes 15 are arranged in the middle of the gas lane equidistant from these center planes 4.
  • the individual precipitation electrodes consist of profiled sheet metal strips 5, in which dust collecting spaces 2 are alternately formed.
  • the individual sheet metal strips 5 are hooked together at their vertical longitudinal edges 9 and non-positively connected at 19 to the lower cross connection 18.
  • the lower cross connection 18 also represents the knock linkage to which the anvil 16 is attached.
  • the direction of the knocking is indicated by the arrows 17, while the arrow 20 indicates the direction of gas flow.
  • the vertical distance 1 between the sections 14 running parallel to the gas flow direction 20 (see FIG. 3) or in other words the depth of the dust-collecting space is expediently 8 to 13% of the center distance 3 between two adjacent precipitation electrode walls.
  • the center distance 6 of two successive profiles in the same direction is advantageously 40 to 70% of the center distance 3 between two adjacent precipitation electrode walls.
  • the parallel sections 14 lying between two inclined sections 13 have a width 7 of 8 to 13% of the center distance 6 of two successive profiles in the same direction.
  • the angle 12 between the inclined sections 13 of the metal strips 5 and the parallel sections 14, 14a should be at least 150 °.
  • the space 8 at the end 180 ° fold suitably corresponds to four to five times the thickness 10 of the metal strip 5.
  • An effective hooking of the vertical longitudinal edges is achieved when the outer length 11 of the 180 ° fold is about 1 to 1.2 times as large is like the width 7 of the parallel sections 14. All of the dimensions mentioned result from FIG. 1 in conjunction with FIG. 3.
  • Figure 1 also shows that in the case of adjacent precipitation electrode walls, the profiles of the metal strips 5 are arranged in mirror image opposite, that a spray electrode 15 is arranged in the geometric and electrical center in the area of the greatest distances between two adjacent profiled metal strips 5 and that the inclined sections 13th Adjacent precipitation electrode walls are tangent to a circle around the spray electrode 15 as the center.
  • FIG. 2 shows a side view of how the individual sheet metal strips 15 are connected at 19 to the lower cross connection 18, which at the same time carries the anvil 16 for the knocking strokes in the direction 17.
  • the lower cross connection 18 and knock linkage are thus identical.

Landscapes

  • Electrostatic Separation (AREA)
EP85200160A 1984-03-10 1985-02-11 Niederschlagselektrode für Staubabscheider Expired EP0155713B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843408839 DE3408839A1 (de) 1984-03-10 1984-03-10 Niederschlagselektrode fuer staubabscheider
DE3408839 1984-03-10

Publications (2)

Publication Number Publication Date
EP0155713A1 EP0155713A1 (de) 1985-09-25
EP0155713B1 true EP0155713B1 (de) 1987-05-06

Family

ID=6230122

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85200160A Expired EP0155713B1 (de) 1984-03-10 1985-02-11 Niederschlagselektrode für Staubabscheider

Country Status (13)

Country Link
US (1) US4614526A (xx)
EP (1) EP0155713B1 (xx)
JP (1) JPH062242B2 (xx)
AU (1) AU566632B2 (xx)
CA (1) CA1259040A (xx)
CZ (1) CZ278119B6 (xx)
DE (2) DE3408839A1 (xx)
DK (1) DK165676C (xx)
ES (1) ES295720Y (xx)
IN (1) IN163802B (xx)
PL (1) PL142618B2 (xx)
SK (1) SK277841B6 (xx)
ZA (1) ZA851762B (xx)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3712726A1 (de) * 1987-04-15 1988-11-10 Metallgesellschaft Ag Spruehelektrode
PL2078563T3 (pl) * 2008-01-09 2013-03-29 General Electric Technology Gmbh Sposób i urządzenie do sterowania elektrofiltrem
JP6523161B2 (ja) * 2015-12-28 2019-05-29 住友金属鉱山エンジニアリング株式会社 電気集塵機の極室面寸法不良判定装置
RU2685569C1 (ru) * 2018-09-03 2019-04-22 Виталий Григорьевич Ерошенко Электрофильтр
RU2729817C1 (ru) * 2020-02-21 2020-08-12 Акционерное общество "Кондор-Эко" Способ изготовления осадительных электродов электрофильтра

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE316703C (xx) *
AT83347B (de) * 1918-06-27 1921-03-25 Siemens Schuckertwerke Gmbh Elektrodenanordnung für elektrische Niederschlagsanlagen.
GB374145A (en) * 1930-03-24 1932-06-06 Jehan Bremond Improvements in electrostatic apparatus for separating particles of dust in suspension in a gaseous fluid
GB721158A (en) * 1954-02-09 1954-12-29 Dieter Otto Heinrich Improvements relating to electro-static precipitators
DE1107203B (de) * 1958-11-25 1961-05-25 Metallgesellschaft Ag Plattenfoermige Niederschlagselektrode fuer Elektrofilter
DE1407529B2 (de) * 1960-05-10 1970-12-17 Metallgesellschaft AG, 6OOO Frankfurt Plattenförmige Niederschlagselektrode für Elektrofilter
DE1848928U (de) * 1961-12-07 1962-03-29 Walther & Cie Ag Niederschlagselektrode fuer elektrofilter.
DE1851222U (de) * 1962-03-01 1962-05-10 Metallgesellschaft Ag Plattenfoermige niederschlagselektrode.
DE1869720U (de) * 1962-07-04 1963-04-04 Metallgesellschaft Ag Niederschlagselektrode fuer elektrofilter.
DE1878831U (de) * 1963-06-19 1963-09-05 Metallgesellschaft Ag Spruehelektrodenfeld aus rostartigen einzelelementen.
DE1557132A1 (de) * 1966-01-07 1970-03-26 Metallgesellschaft Ag Niederschlagselektrodenfeld fuer elektrostatische Staubabscheider
US3402526A (en) * 1967-06-26 1968-09-24 Koppers Co Inc Modular collector electrode for electrostatic precipitators
US3418792A (en) * 1967-06-26 1968-12-31 Koppers Co Inc Modular collector electrode for electrostatic precipitators
FR2126068A1 (en) * 1971-02-23 1972-10-06 Tunzini Ameliorair Sa Continuous electrostatic precipitator - with horizontal gas flow between vertically folded plates reducing dust re-entrainmen
DE7114982U (de) * 1971-04-20 1971-07-08 Metallgesellschaft Ag Niederschlagselektrodenstreifen
DE2433596C3 (de) * 1974-07-12 1978-05-11 Metallgesellschaft Ag, 6000 Frankfurt Elektrostatischer Staubabscheider
DE2535830A1 (de) * 1975-08-12 1977-02-24 Metallgesellschaft Ag Elektrostatischer staubabscheider
DE2904339A1 (de) * 1979-02-06 1980-08-14 Metallgesellschaft Ag Mehrfeldriger elektrofilter
DD215479B2 (de) * 1982-07-06 1987-06-24 Siegfried Lange Gestaltung von platten- oder streifenfoermigen niederschlagselektroden fuer horizontalelektroabscheider

Also Published As

Publication number Publication date
PL252329A1 (en) 1985-11-19
PL142618B2 (en) 1987-11-30
DE3560151D1 (en) 1987-06-11
DK165676B (da) 1993-01-04
ES295720U (es) 1987-04-01
DK109085A (da) 1985-09-11
SK154085A3 (en) 1995-04-12
CZ154085A3 (en) 1993-04-14
CZ278119B6 (en) 1993-09-15
SK277841B6 (en) 1995-04-12
IN163802B (xx) 1988-11-12
AU3967985A (en) 1985-09-12
ZA851762B (en) 1985-11-27
AU566632B2 (en) 1987-10-22
ES295720Y (es) 1987-11-16
EP0155713A1 (de) 1985-09-25
JPS60206457A (ja) 1985-10-18
DK165676C (da) 1993-06-07
DE3408839A1 (de) 1985-09-12
US4614526A (en) 1986-09-30
CA1259040A (en) 1989-09-05
DK109085D0 (da) 1985-03-08
JPH062242B2 (ja) 1994-01-12

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