EP0352451A2 - Electrofiltre - Google Patents

Electrofiltre Download PDF

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Publication number
EP0352451A2
EP0352451A2 EP89110363A EP89110363A EP0352451A2 EP 0352451 A2 EP0352451 A2 EP 0352451A2 EP 89110363 A EP89110363 A EP 89110363A EP 89110363 A EP89110363 A EP 89110363A EP 0352451 A2 EP0352451 A2 EP 0352451A2
Authority
EP
European Patent Office
Prior art keywords
electrodes
spray
precipitation
gases
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.)
Withdrawn
Application number
EP89110363A
Other languages
German (de)
English (en)
Other versions
EP0352451A3 (fr
Inventor
Wilfried Schnabel
Bernd Colombo
Hubert Kinne
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz 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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of EP0352451A2 publication Critical patent/EP0352451A2/fr
Publication of EP0352451A3 publication Critical patent/EP0352451A3/fr
Withdrawn legal-status Critical Current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
    • B03C3/53—Liquid, or liquid-film, electrodes
    • 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
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/04—Plant or installations having external electricity supply dry type
    • B03C3/06—Plant or installations having external electricity supply dry type characterised by presence of stationary tube electrodes
    • 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
    • B03C3/455—Collecting-electrodes specially adapted for heat exchange with the gas stream
    • 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
    • B03C3/49—Collecting-electrodes tubular

Definitions

  • the invention relates to an electrostatic precipitator for the separation of liquids and / or solids from gases, in particular for the separation of liquid mists and aerosols from industrial exhaust gases, in which the precipitation electrodes are arranged essentially vertically and are tubular, in which the spray electrodes are arranged centrally are.
  • the tubular precipitation electrodes are provided with an equally large clear cross-section extending from the upper end to the lower end. Due to this design of the tubular precipitation electrodes, it cannot be avoided that in the lower region, i.e. in the exit region of the liquid or the solids from the tubular precipitation electrodes, electrical flashovers occur between the spray electrodes and the precipitation electrodes, as a result of which the spray electrode is destroyed and replaced relatively quickly must become.
  • the electrical flashovers from the spray electrode to the precipitation electrode in the outlet region of the liquid or the solids from the tubular precipitation electrodes can be attributed to the liquid drops and / or solid particles that migrate from top to bottom on the inner wall of the precipitation electrode, in particular due to their increasingly increased deposition and thereby increased proximity to the spray electrode in the outlet area of the precipitation electrode.
  • the tubular precipitation electrodes are individually loosely suspended in the filter housing, independently of one another, so that they correspond to sufficient stability for the filtering process must be dimensioned accordingly strong, which in turn is associated with increased costs and labor.
  • the object of the invention is to avoid electrical flashovers from the spray electrode to the precipitation electrode by appropriate design and arrangement of the precipitation electrodes of an electrostatic precipitator and to improve the filter in its construction.
  • the precipitation electrodes are funnel-shaped at least at the lower ends and are combined to form a self-contained spatial unit.
  • the precipitation electrodes are funnel-shaped at the lower ends, the liquid drops and / or solid particles deposited on the inner wall of the precipitation electrodes are diverted from the spray electrodes to the outside into a region of greatly reduced field strength before they emerge downwards from the precipitation electrodes and thereby avoiding electrical flashovers from the spray electrode to the precipitation electrode with certainty.
  • the service life of the spray electrodes of an electrostatic filter is therefore quite compared to the previously known electrostatic filters of a similar design significantly increased.
  • a very compact, space-saving design of the electrodes of high stability is achieved.
  • a device for the dedusting of industrial gases which consists essentially of a washing tower, which is provided in the upper area with a spray electrode assembly, in which the spray electrodes are surrounded by honeycomb-shaped hexagonal tube sections in the form of a shell.
  • This arranged in the upper area of the spray tower spray electrode unit only serves to negatively charge the dust particles in the gas stream, so that they connect to the positively charged water drops located in the washroom underneath and can be deposited and removed from the gas stream.
  • the precipitation electrode consists of a cylindrical tube which is surrounded by a square tube, in particular a hexagonal tube, at a distance in the form of a jacket, the jacket tubes having supply and discharge lines for the supply and discharge of coolants into the cavity between the cylindrical shape formed precipitation electrode and the jacket tube are provided.
  • the supply and discharge of coolants into the cavity between the cylindrical precipitation electrode and the jacket tube very advantageously intensifies the condensation of the liquid in the gas stream in vapor or mist form and thereby the separation of liquids, in particular liquid mists and aerosols from the gas stream significantly improved.
  • the electrostatic precipitator for separating liquids and / or solids from gases consists of precipitation arranged vertically in a housing (1) electrodes (2) with spray electrodes (3) running centrally from top to bottom.
  • the precipitation electrodes (2) are tubular and have a funnel shape at their upper and lower ends (4, 5). In these end areas (4) and (5), the precipitation electrodes (2) are welded together and form a self-contained, very stable unit of space.
  • a pipe socket (6) for the supply of liquid or gaseous coolants into the cavities (7) located between the precipitation electrodes (2) is provided on the filter housing (1) on the left in the drawing.
  • the coolant is drawn off via a pipe socket (8) arranged at the lower end of the housing (1).
  • the gases loaded with liquids and / or solids are fed to the electrostatic filter in the direction of the arrow (9) from below, from where they flow through the tubular precipitation electrodes (2) from bottom to top.
  • liquid or gaseous coolant is introduced through the nozzle (6) on the housing (1) in the direction of the arrow (10) into the cavities (7) between the precipitation electrodes (2), which the tubular precipitation electrodes (2) from the top downwards from the outside washed around and over the pipe socket (8) at the lower right end on the filter housing in the direction of the arrow (11) is again discharged to the outside.
  • the tubular precipitation electrodes (2) are very advantageously cooled from the outside, thereby condensing the liquid present in the gases in mist or vapor form and causing them to precipitate in the form of liquid drops on the inner wall of the precipitation electrodes (2), from where together with the liquids and / or solid particles deposited electrostatically from the gases in the precipitation electrodes, they are discharged downwards through the funnel-shaped extensions (5) in the direction of the arrow (12) from the filter.
  • the liquids and / or solids separated from the gases are very advantageously guided away from the spray electrodes (3) into an area of reduced field strength, so that electrical arcing between the spray electrodes (3) and the precipitation electrodes (2) can be avoided with certainty.
  • the spray electrodes (3) are thereby protected from electrically erosive destruction in the area of the discharge of liquids and solids from the precipitation electrodes (2) and their service life is thereby increased considerably.
  • the tubular precipitation electrodes (13) can optionally also be very advantageously surrounded by a jacket tube (14) with a hexagonal cross section and combined into a honeycomb-shaped structural unit.
  • These cylinder-shaped precipitation electrodes (13) with their centrally arranged, rod-shaped spray electrodes (15) are also very advantageously in operation of the electrostatic filter to support the condensation of liquids present in the gas with liquid or gaseous cooling media which are flushed through a pipe socket (16)
  • the unit is fed in from above and removed from the filter again through a pipe socket (17) at the lower right end.
  • This design and arrangement of the precipitation electrodes shown in FIG. 2 is particularly characterized by its high stability and easy handling. It can also be easily installed as a closed unit in any arrangement and size at any time, even with existing electrostatic filters.

Landscapes

  • Electrostatic Separation (AREA)
EP19890110363 1988-07-28 1989-06-08 Electrofiltre Withdrawn EP0352451A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3825636 1988-07-28
DE19883825636 DE3825636A1 (de) 1988-07-28 1988-07-28 Elektrofilter

Publications (2)

Publication Number Publication Date
EP0352451A2 true EP0352451A2 (fr) 1990-01-31
EP0352451A3 EP0352451A3 (fr) 1990-12-12

Family

ID=6359746

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890110363 Withdrawn EP0352451A3 (fr) 1988-07-28 1989-06-08 Electrofiltre

Country Status (3)

Country Link
EP (1) EP0352451A3 (fr)
DE (1) DE3825636A1 (fr)
DK (1) DK369689A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000010713A1 (fr) * 1998-08-20 2000-03-02 Baltic Metalltechnik Gmbh Purificateur d'air electrostatique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19841973C2 (de) * 1998-09-14 2002-08-14 Keller Lufttechnik Gmbh & Co Kg Aus Sprühelektroden und einer Niederschlagselektrode gebildete Elektro-Filterstufe
CN105251299B (zh) * 2015-08-06 2017-10-10 安溪县桃舟大富山林茶场 一种烟道除尘装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1329844A (en) * 1917-11-26 1920-02-03 Research Corp Downdraft wet precipitator
FR944548A (fr) * 1947-03-20 1949-04-07 Cfcmug Perfectionnement aux appareils de purification des gaz par précipitation électrique
DE1013626B (de) * 1955-01-05 1957-08-14 Metallgesellschaft Ag Als indirekt wirkender Kuehler ausgebildetes Elektrofilter
WO1982003344A1 (fr) * 1981-03-26 1982-10-14 Peabody Process Syst Precipitateur electrostatique ayant une electrode de decharge de grande resistance

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1329844A (en) * 1917-11-26 1920-02-03 Research Corp Downdraft wet precipitator
FR944548A (fr) * 1947-03-20 1949-04-07 Cfcmug Perfectionnement aux appareils de purification des gaz par précipitation électrique
DE1013626B (de) * 1955-01-05 1957-08-14 Metallgesellschaft Ag Als indirekt wirkender Kuehler ausgebildetes Elektrofilter
WO1982003344A1 (fr) * 1981-03-26 1982-10-14 Peabody Process Syst Precipitateur electrostatique ayant une electrode de decharge de grande resistance

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000010713A1 (fr) * 1998-08-20 2000-03-02 Baltic Metalltechnik Gmbh Purificateur d'air electrostatique
US6497753B1 (en) 1998-08-20 2002-12-24 Baltic Metalltechnik Gmbh Electrostatic air cleaner

Also Published As

Publication number Publication date
EP0352451A3 (fr) 1990-12-12
DK369689D0 (da) 1989-07-27
DE3825636A1 (de) 1990-02-01
DK369689A (da) 1990-01-29

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