WO1982000259A1 - Filtre electrique - Google Patents

Filtre electrique Download PDF

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Publication number
WO1982000259A1
WO1982000259A1 PCT/FI1981/000053 FI8100053W WO8200259A1 WO 1982000259 A1 WO1982000259 A1 WO 1982000259A1 FI 8100053 W FI8100053 W FI 8100053W WO 8200259 A1 WO8200259 A1 WO 8200259A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrodes
water
gas
electric filter
glass
Prior art date
Application number
PCT/FI1981/000053
Other languages
English (en)
Inventor
A Artama
U Nurmi
Original Assignee
A Artama
U Nurmi
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 A Artama, U Nurmi filed Critical A Artama
Priority to AT0908781A priority Critical patent/AT382526B/de
Priority to DE813152216T priority patent/DE3152216T1/de
Priority to NL8120285A priority patent/NL8120285A/nl
Publication of WO1982000259A1 publication Critical patent/WO1982000259A1/fr
Priority to NO82820783A priority patent/NO157087C/no
Priority to DK109382A priority patent/DK109382A/da

Links

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
    • B03C3/74—Cleaning the electrodes
    • B03C3/78—Cleaning the electrodes by washing
    • 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
    • B03C3/16—Plant or installations having external electricity supply wet type
    • 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
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/40—Electrode constructions
    • B03C3/60—Use of special materials other than liquids

Definitions

  • the object of the invention is a so-called electric filter, the purpose of which is to separate from air or other gas small solid particles by means of an electrostatic method known as such, and which is of such type as is specified more exactly in the introduction to patent claim 1.
  • Other particles may bounce off the dry electrode when they exchange their original electric charge for that of the collection electrode. Continuous rinsing of the collection electrode may not be practicable due to complete coverage of the electrode not being attainable with moderate water consumption A layer of particles then gathers on the dry portions and causes a short circuit.
  • quartz dust and carbon dust may bounce off the dry electrode when they exchange their original electric charge for that of the collection electrode. Continuous rinsing of the collection electrode may not be practicable due to complete coverage of the electrode not being attainable with moderate water consumption A layer of particles then gathers on the dry portions and causes a short circuit.
  • the purpose of the invention is to produce an electric filter from which the aforementioned drawbacks have been removed.
  • This continuous rinsing of the filter collection plate is carried out completely with comparatively low water consumption resulting in all types of solid particles over the whole electrode area being carried away by the flowing water film and removed with it from the electric field.
  • the invention is characterized by the fact that the impure particle collection plates situated in the electrostatic field are made of glass or corresponding material which is wetted by water. In this way the rinsing water is caused to spread with great effectiveness over the surface of the plate and cover it completely yet in a thin layer. The water film thus acts as an electrode, since the glass does not conduct electricity.
  • Figure 1 shows diagrammatically the electric filter according to the invention seen from the side, partly sectioned
  • Figure 2 shows diagrammatically a horizontal cross-section of the electric filter along A-A in figure 1.
  • the figure also shows a circuit diagram of the electrical connections
  • Figure 3 shows diagrammatically a vertical cross—section of the electric filter along B-B in figure 1
  • FIG. 4 shows in part the ionisation electrodes enlarged of the electric filter.
  • the electric filter shown in figures 1-4 includes a supporting case 1.
  • the intake opening 2 for the air to be cleaned is at one end of the case and the output opening 3 for the cleaned air is at the opposite end.
  • an electrically driven fan 4 which draws air in via the input opening 2 and then through the filter.
  • the fan may also be placed together with the input opening, in which case it blows air through the filter.
  • the case is also provided with an openable cover 5. through which the electrical equipment and other parts inside the case may be serviced.
  • a sump 6 into which the filter rinsing water flows.
  • an ionisation device which ionises the air in a known manner.
  • the device is a group of positive ionisation electrodes in a construction known as such, which in this embodiment are attached to a rectangular supporting frame 7 for example to supporting heads 8 in the upper and lower frame members.
  • the electrodes 9 are thick metal wire, for exampl tungsten wire.
  • the other electrode group of the ionisation device is formed by the group 10 negative counter-electrod which are attached to another frame 11 between its upper and lower members in a vertical row with equal spacing.
  • Electrodes 10 are materially thicker in cross-section made for example from stainless steel wire, which is coiled in the form of a helical spring (figures 2 and 4) . Both electrode groups are fitted so for example that they are situated in the same row parallel and at equal intervals, thinner electrodes alternating with thicker ones (figures 2 and 4) . The electrodes may naturally also be situated grouped in successive rows longitudinally along the filter. According to the invention the construction of the elec trodes is further special in that the said electrodes 10 are continuously rinsed with a water current so that charged dust particles possibly striking them do not remain attached but are washed off. The electrodes thus remain clean and the ionisation device functions without fault.
  • a water channel or pipe into holes (not shown in the figure) in the base of which the electrodes are placed, loosely fitting, so that water can run through the holes downwards onto the electrodes.
  • electrodes in the form of a helical spring there may also be used. some kind of corresponding thick metal braid, chain, or wire rope.
  • the air current from the above mentioned ionisation device goes to the filter electrostatic field, which is formed of a group of parallel plate electrodes 13 , 14 placed vertically relative to the direction of the air current. Of these each alternate plate 13 is connected to the positive pole of the voltage supply, and each other plate 14 to the negative. Solid particles acquiring a positive charge from the ionisation device travel to the negative collection electrode 14.
  • the said negative collection plates 14 are made of glass or corresponding material.
  • a continuous rinsing of them is arranged. Water comes to the collection plate 14 from parts such as the pipes 15 which are placed near to the upper edge of the plates and running in the same direction as the edge.
  • small nozzle holes are made at equal intervals to the pipes 15, so that water jets are directed from the pipes 15 slantingly downwards to the side surfaces of the. said glass plates at their upper edge in the form of numerous fine sprays.
  • Another possible embodiment is to arrange the water distribution to the glass plate through narrow downward directed apertures in the direction of length of the pipe 15. The water then spreads as a thin even film over the surface of the glass plate, so that ther remain no dry, unrinsed points which would weaken the cleansing ability of the filter.
  • the positive electrodes 13 on the other hand may be mad for example from stainless steel and do not need to be rinsed since the dust particles only accumulate on the collection electrode 14.
  • the body of the device is earthed and the negative pole of the supply is connected to the earth lead, to which is also connected the negative electrodes 10 of the ionisation device and the pipes 15, which are therefore metal or contain conductive parts through which electricity is conducted to the rinsing water.
  • the positive terminal of the supply is connected to the positive ionisation electrodes 1 of the ionisation device and similarly the plates forming the electrostatic field are connected to the positive plate electrodes 13.
  • water conductivity may be improved by the addition of some suitable salt.
  • the rinsing water may be led directly to a drain together with the accumulated impurities. It may also be arrange in a closed circuit, in which the dust is separated fro the water by means of a suitable filter.
  • the constructional parts of the device such as the ionisation device, the electrode groups and the electro static field electrodes etc. may be arranged so as to be easily removable and exchangeable in order to facilitate maintenance.
  • the embodiment of the device may vary within the patent claims.

Landscapes

  • Electrostatic Separation (AREA)
  • Filtering Materials (AREA)

Abstract

Un filtre electrique possede une chambre ou boitier (1), au travers duquel on envoie a l'aide d'un ventilateur (4) de l'air ou un autre gaz a epurer. Un dispositif d'ionisation est prevu pour le gaz a epurer, ce dispositif consistant en une ou plusieurs electrodes d'ionisation (9) et de contre-electrodes (10). Un champ electrostatique est forme par des electrodes positives et negatives (13, 14) dont les electrodes collectrices en forme de plaque (14) sont, au moins partiellement, en verre ou en un materiau correspondant et sur lesquelles les particules d'impuretes de l'air ou autre gaz a epurer, qui ont recues une charge par le dispositif d'ionisation, tendent a s'accumuler. Une pellicule d'eau s'ecoulant continuellement sur une plaque de verre ou autre materiau reagissant a l'eau de la meme maniere que le verre joue le role d'electrode collectrice (14). Ainsi, les particules solides et seches telles que les poussieres de quartz ou de carbone contenues dans le gaz a epurer sont transportees avec le film d'eau sans ricocher des electrodes lorsqu'elles echangent leur charge d'origine par une charge du meme signe que celui des electrodes collectrices. Dans le sens du bord superieur des plaques solides des electrodes collectrices (14) des organes de conduction de l'eau sont montes pour canaliser un courant d'eau sur la plaque, par exemple des tubes (15) ayant de petits trous ou des ouvertures longitudinales laissant passer un courant d'eau.
PCT/FI1981/000053 1980-07-15 1981-07-06 Filtre electrique WO1982000259A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT0908781A AT382526B (de) 1980-07-15 1981-07-06 Elektrischer filter
DE813152216T DE3152216T1 (de) 1980-07-15 1981-07-06 Electric filter
NL8120285A NL8120285A (fr) 1980-07-15 1981-07-06
NO82820783A NO157087C (no) 1980-07-15 1982-03-11 Elektrostatisk filter.
DK109382A DK109382A (da) 1980-07-15 1982-03-12 Elektrisk filter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI802245800715 1980-07-15
FI802245A FI61815C (fi) 1980-07-15 1980-07-15 Elektriskt filter

Publications (1)

Publication Number Publication Date
WO1982000259A1 true WO1982000259A1 (fr) 1982-02-04

Family

ID=8513628

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1981/000053 WO1982000259A1 (fr) 1980-07-15 1981-07-06 Filtre electrique

Country Status (14)

Country Link
JP (1) JPS57501170A (fr)
AT (1) AT382526B (fr)
CH (1) CH659006A5 (fr)
CS (1) CS243462B2 (fr)
DD (1) DD206942A1 (fr)
DE (1) DE3152216T1 (fr)
DK (1) DK109382A (fr)
FI (1) FI61815C (fr)
FR (1) FR2486823A1 (fr)
GB (1) GB2098509B (fr)
NL (1) NL8120285A (fr)
NO (1) NO157087C (fr)
SE (1) SE435140B (fr)
WO (1) WO1982000259A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2633199A1 (fr) * 1988-06-27 1989-12-29 Aaf Sa Procede d'optimisation de l'exploitation des filtres electrostatiques par nettoyage en continu des elements filtrants
WO1990006181A1 (fr) * 1988-12-07 1990-06-14 Radex-Heraklith Industriebeteiligungs Aktiengesellschaft Procede de separation electrostatique de particules solides et d'aerosols contenus dans des gaz
EP0796149A1 (fr) * 1994-12-06 1997-09-24 United States Environmental Protection Agency Dispositif electrostatique de precipitation recueillant plusieurs types de polluants

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3713651A1 (de) * 1987-04-23 1988-11-17 Thomas F Burger Umluftwaescher
DE3900139A1 (de) * 1989-01-04 1990-07-12 Sueddeutsche Kuehler Behr Vorrichtung zum filtern eines einem innenraum eines fahrzeuges zugefuehrten luftstromes
DE3914673C3 (de) * 1989-05-03 1994-04-14 Boehler Abfall Abluft Abwasser Verfahren und Vorrichtung zum Reinigen von Abgasen aus Holztrocknungsanlagen
DE3915248C2 (de) * 1989-05-10 1999-10-14 Festo Ag & Co Vorrichtung zur Reinigung und Befeuchtung von Raumluft

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2555216A (en) * 1946-09-24 1951-05-29 Research Corp Electrical precipitator
DE845495C (de) * 1944-11-14 1952-07-31 Metallgesellschaft Ag Elektrofilter fuer aggressive Gase oder Fluessigkeiten
US3248857A (en) * 1961-09-27 1966-05-03 Metallgesellschaft Ag Chlorine filter
FR2380818A1 (fr) * 1977-02-22 1978-09-15 Tissmetal Lionel Dupont Appareil pour le traitement d'une phase gazeuse contenant un solide ou un liquide tres finement divise sous forme de particules
GB1530203A (en) * 1975-06-19 1978-10-25 Dart Ind Inc Electrostatic precipitator
GB1542202A (en) * 1977-03-02 1979-03-14 Eyraud C Apparatus for the treatment of a gaseous phase
FI783720A (fi) * 1978-12-04 1980-06-05 Arvi Artama Stoftavskiljare

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5327285U (fr) * 1976-08-13 1978-03-08
FI56776C (fi) * 1977-06-02 1980-04-10 Arvi Artama Elektrostatisk stoftavskiljare
US4189308A (en) * 1978-10-31 1980-02-19 Research-Cottrell, Inc. High voltage wetted parallel plate collecting electrode arrangement for an electrostatic precipitator

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE845495C (de) * 1944-11-14 1952-07-31 Metallgesellschaft Ag Elektrofilter fuer aggressive Gase oder Fluessigkeiten
US2555216A (en) * 1946-09-24 1951-05-29 Research Corp Electrical precipitator
US3248857A (en) * 1961-09-27 1966-05-03 Metallgesellschaft Ag Chlorine filter
GB1530203A (en) * 1975-06-19 1978-10-25 Dart Ind Inc Electrostatic precipitator
FR2380818A1 (fr) * 1977-02-22 1978-09-15 Tissmetal Lionel Dupont Appareil pour le traitement d'une phase gazeuse contenant un solide ou un liquide tres finement divise sous forme de particules
GB1542202A (en) * 1977-03-02 1979-03-14 Eyraud C Apparatus for the treatment of a gaseous phase
FI783720A (fi) * 1978-12-04 1980-06-05 Arvi Artama Stoftavskiljare

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2633199A1 (fr) * 1988-06-27 1989-12-29 Aaf Sa Procede d'optimisation de l'exploitation des filtres electrostatiques par nettoyage en continu des elements filtrants
WO1990006181A1 (fr) * 1988-12-07 1990-06-14 Radex-Heraklith Industriebeteiligungs Aktiengesellschaft Procede de separation electrostatique de particules solides et d'aerosols contenus dans des gaz
EP0796149A1 (fr) * 1994-12-06 1997-09-24 United States Environmental Protection Agency Dispositif electrostatique de precipitation recueillant plusieurs types de polluants
EP0796149A4 (fr) * 1994-12-06 1998-03-11 Us Environment Dispositif electrostatique de precipitation recueillant plusieurs types de polluants

Also Published As

Publication number Publication date
DD206942A1 (de) 1984-02-15
FI802245A (fi) 1982-01-16
ATA908781A (de) 1986-08-15
FI61815B (fi) 1982-06-30
JPS57501170A (fr) 1982-07-08
FR2486823B1 (fr) 1985-04-26
FR2486823A1 (fr) 1982-01-22
DE3152216C2 (fr) 1988-07-14
CS243462B2 (en) 1986-06-12
NO157087C (no) 1988-01-20
GB2098509A (en) 1982-11-24
SE435140B (sv) 1984-09-10
NL8120285A (fr) 1982-10-01
NO820783L (no) 1982-03-11
NO157087B (no) 1987-10-12
DK109382A (da) 1982-03-12
FI61815C (fi) 1982-10-11
DE3152216T1 (de) 1982-08-26
SE8204590L (sv) 1982-08-05
CH659006A5 (de) 1986-12-31
GB2098509B (en) 1984-08-01
AT382526B (de) 1987-03-10
SE8204590D0 (sv) 1982-08-05

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