EP0300515A2 - Méthode de dépoussiérage des électrodes collectrices d'un séparateur électrostatique de poussière - Google Patents

Méthode de dépoussiérage des électrodes collectrices d'un séparateur électrostatique de poussière Download PDF

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Publication number
EP0300515A2
EP0300515A2 EP88200870A EP88200870A EP0300515A2 EP 0300515 A2 EP0300515 A2 EP 0300515A2 EP 88200870 A EP88200870 A EP 88200870A EP 88200870 A EP88200870 A EP 88200870A EP 0300515 A2 EP0300515 A2 EP 0300515A2
Authority
EP
European Patent Office
Prior art keywords
gas flow
gas
precipitation electrode
dust
fields
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.)
Withdrawn
Application number
EP88200870A
Other languages
German (de)
English (en)
Other versions
EP0300515A3 (fr
Inventor
Hermann Schmidt
Rainer Skroch
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 EP0300515A2 publication Critical patent/EP0300515A2/fr
Publication of EP0300515A3 publication Critical patent/EP0300515A3/fr
Withdrawn legal-status Critical Current

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    • 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
    • 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
    • B03C3/74—Cleaning the electrodes

Definitions

  • the invention relates to a method for removing the dust from plate-shaped, gas lanes forming precipitation electrodes in an electrostatic dust separator for horizontal gas passage with at least two fields arranged one behind the other in the gas flow direction by periodically repeated mechanical shaking of a single precipitation electrode wall with simultaneous blocking of the gas passage in both sides of the individual Precipitation electrode wall lying gas lanes by means of sealing gas flow directed opposite to the gas flow direction.
  • Such a method is known from DE-OS 28 29 210. It is assumed that in the case of electrostatic dust collectors, the amounts of dust deposited on the precipitation electrode walls are periodically cleaned in order to maintain the full separation efficiency.
  • the precipitation electrode walls are vibrated in a known manner, for example by tapping devices, as a result of which the adhering layers of dust are detached and fall into the dust collection bunker located underneath. During this cleaning, part of the already deposited dust is whirled up again by the gas stream and discharged from the electrostatic dust separator. In order to keep these so-called knocking losses low, the speed of the gas flow is usually chosen to be very low and several fields are arranged one behind the other, which however leads to a great deal of structural effort.
  • shut-off devices require considerable effort, which is often not justifiable in terms of the improvement in the separation performance.
  • the main disadvantage of such shut-off devices is that the bearing points of the moving parts are exposed to the hot gas stream and the dust entrained therein, which often causes malfunctions, so that the investment costs are still expensive to maintain and repair.
  • the precipitation electrode walls of successive fields no longer become one from field to field cleaned different rhythm. Rather, the precipitation electrode walls of all existing fields, which are arranged in line one behind the other, are simultaneously cleaned, the gas passages associated on both sides then being blocked and an upstream gas movement being generated, by means of which the resuspended dust is discharged upstream of the field against the normal gas flow direction, from where it is transported with the main gas stream to the neighboring, unblocked gas lanes.
  • the precipitation electrode walls forming the immediately adjacent gas lanes have an average separation efficiency because one of them has just been cleaned and the other has to be cleaned next.
  • this average separation efficiency is sufficient in the process according to the invention to keep the clean gas dust content within the permissible limits, even if local dust is whirled up again by periodic cleaning of the precipitation electrode walls.
  • drop hammers are used to generate the mechanical vibrations, which are articulated to waves running perpendicular to the precipitation electrodes in such a way that, if the speed of rotation of the waves coincides in all fields, a synchronous knocking on the individual precipitation electrode walls of all fields arranged in line one behind the other be exercised.
  • tubes are arranged parallel to each vertical rear boundary edge of the precipitation electrode walls in order to introduce the sealing gas stream upstream nozzles are used and that to shut off the gas lanes lying on both sides of a precipitation electrode wall to be cleaned, the pipe parallel to this precipitation electrode wall and the two adjacent tubes are acted upon in synchronization with the periodic cleaning with sealing gas.
  • the duty cycle of the propellant gas stream is preferably 3 to 10 times the time required for the gas flow flowing in the opposite direction to the normal gas flow direction to flow through a field, the precipitation electrodes being cleaned during the first third of the duty cycle. It is also expedient if the coordination of the duty cycle of the propellant gas flow with the sequence of mechanical vibrations or with the speed of the drop hammer shafts is carried out with the aid of a programmable control.
  • the two-field electrostatic dust separator 1 has a housing with side walls (2), ceiling (3) and dust collection bunkers (4) connected below. (5) denotes the gas inlet side and (6) the gas outlet side. Precipitation electrodes (7) are arranged in the dust separator (1) and consist of plate-shaped elements that form gas passages and are suspended from the ceiling (3) via supporting devices (8). The spray electrodes, which are each arranged centrally in the gas lanes, were not shown in FIGS. 1 and 2.
  • the individual precipitation electrode walls can be subjected to mechanical shocks by means of tapping devices (not shown) for cleaning the dust accumulated thereon, arrows (9) indicating which two precipitation electrode walls lying one behind the other in the gas flow direction are simultaneously shaken by the tapping device at any time.
  • lances (10) with upstream nozzles are provided parallel to each vertical rear boundary edge of the precipitation electrode walls and can be acted upon by a propellant gas stream via common lines (11 and 13) and shut-off devices (12) (dashed lines in FIG. 2).
  • the individual precipitation electrode walls of all fields arranged one behind the other in the gas flow direction are cleaned at the same time (the third from below in FIG. 2) and then the associated ones on both sides Gas lanes in all fields are blocked and a gas flow flowing in the gas lanes opposite to the normal gas flow direction is generated in these gas lanes (small arrows in FIG. 2).

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  • Electrostatic Separation (AREA)
EP88200870A 1987-07-04 1988-05-04 Méthode de dépoussiérage des électrodes collectrices d'un séparateur électrostatique de poussière Withdrawn EP0300515A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3722193 1987-07-04
DE3722193A DE3722193C1 (de) 1987-07-04 1987-07-04 Verfahren zum Entfernen des Staubes von Niederschlagselektroden

Publications (2)

Publication Number Publication Date
EP0300515A2 true EP0300515A2 (fr) 1989-01-25
EP0300515A3 EP0300515A3 (fr) 1990-02-14

Family

ID=6330939

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88200870A Withdrawn EP0300515A3 (fr) 1987-07-04 1988-05-04 Méthode de dépoussiérage des électrodes collectrices d'un séparateur électrostatique de poussière

Country Status (10)

Country Link
US (1) US4844718A (fr)
EP (1) EP0300515A3 (fr)
JP (1) JPS6430663A (fr)
KR (1) KR890001639A (fr)
AU (1) AU597207B2 (fr)
BR (1) BR8803113A (fr)
CA (1) CA1287707C (fr)
DE (1) DE3722193C1 (fr)
IN (1) IN165248B (fr)
ZA (1) ZA884734B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2226566A1 (es) * 2003-06-02 2005-03-16 Unisystems, S.A. Sistema de limpieza de filtros electrostaticos.
CN104368450A (zh) * 2014-11-07 2015-02-25 张家港宣化凯波环保科技有限公司 一种电除尘器的辅助清灰装置

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2133116B1 (es) * 1997-10-10 2000-03-16 Unisystems S A Filtro electrostatico.
FI121410B (fi) * 2003-06-24 2010-11-15 Alstom Technology Ltd Menetelmä sähkösuodattimen puhdistamiseksi suodatustoiminnan aikana ja sähkösuodatin
CN1911526B (zh) * 2005-08-10 2010-08-18 金烈水 一种高效率静电除尘器
HK1150374A2 (en) * 2011-06-07 2011-12-16 陈耀明 An air purification device and method
SE1250749A1 (sv) * 2012-07-02 2014-01-03 Marketing I Konsulting Per Anders Brattemo Förfarande vid slagning av elektrofilter.
JP7554563B2 (ja) 2020-03-04 2024-09-20 三菱重工エンジン＆ターボチャージャ株式会社 回転電機

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE455813A (fr) *
US2554247A (en) * 1947-09-24 1951-05-22 Research Corp Electrical precipitation apparatus
JPS5436674A (en) * 1977-08-29 1979-03-17 Daido Steel Co Ltd Electric dust collector
DE2829210A1 (de) * 1978-07-03 1980-01-17 Metallgesellschaft Ag Verfahren und vorrichtung zur verbesserung der abscheideleistung von elektrofiltern
GB2185911A (en) * 1986-01-30 1987-08-05 Dresser Uk Ltd Variable intensity rapping

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2226566A1 (es) * 2003-06-02 2005-03-16 Unisystems, S.A. Sistema de limpieza de filtros electrostaticos.
ES2226566B1 (es) * 2003-06-02 2006-04-01 Unisystems, S.A. Sistema de limpieza de filtros electrostaticos.
CN104368450A (zh) * 2014-11-07 2015-02-25 张家港宣化凯波环保科技有限公司 一种电除尘器的辅助清灰装置

Also Published As

Publication number Publication date
US4844718A (en) 1989-07-04
AU1860888A (en) 1989-01-05
JPS6430663A (en) 1989-02-01
DE3722193C1 (de) 1988-06-09
CA1287707C (fr) 1991-08-20
EP0300515A3 (fr) 1990-02-14
AU597207B2 (en) 1990-05-24
ZA884734B (en) 1990-03-28
IN165248B (fr) 1989-09-09
KR890001639A (ko) 1989-03-28
BR8803113A (pt) 1989-01-24

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