US3183648A - Arrangement in rapping mechanisms for emission electrodes in electrical precipitators - Google Patents

Arrangement in rapping mechanisms for emission electrodes in electrical precipitators Download PDF

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Publication number
US3183648A
US3183648A US230561A US23056162A US3183648A US 3183648 A US3183648 A US 3183648A US 230561 A US230561 A US 230561A US 23056162 A US23056162 A US 23056162A US 3183648 A US3183648 A US 3183648A
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US
United States
Prior art keywords
precipitator
shaft
opening
driving means
emission 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
US230561A
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English (en)
Inventor
Lagerdahl Sebastian
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.)
Svenska Flaktfabriken AB
Original Assignee
Svenska Flaktfabriken AB
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 Svenska Flaktfabriken AB filed Critical Svenska Flaktfabriken AB
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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
    • B03C3/74—Cleaning the electrodes
    • B03C3/76—Cleaning the electrodes by using a mechanical vibrator, e.g. rapping gear ; by using impact
    • B03C3/761—Drive-transmitting devices therefor, e.g. insulated shafts
    • 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
    • B03C3/76—Cleaning the electrodes by using a mechanical vibrator, e.g. rapping gear ; by using impact

Definitions

  • a rapping mechanism comprises a horizontal shaft equipped with hammers and rotatably driven by a driving means disposed outside the precipitator, the driving means being electrically insulated from the shaft by an intermediate insulating shaft.
  • This invention has as its primary object elimination of the above mentioned drawback and at the same time keeping the insulating shaft as Well as the adjacent shaft ends free of any dust accumulation.
  • the insulating shaft is enclosed in a chamber connected to the precipitator opening into the precipitator housing.
  • the chamber includes a hood enclosing the insulating shaft, the outer periphery of which is a sutficient distance from the non-insulated portion of the shaft to prevent arcing
  • the hood is fastened to and rotates with the shaft of the driving means and has the shape of a truncated cone, the open end of which diverges towards the precipitator a scraping iron projects into the cone and is mounted on a rigid side wall of the precipitator while extending along the entire envelop surface of the cone thereby forming an angle with the generatrix of the inner surface.
  • the drawing is a fragmentary sectional view through a side elevation of a portion of an electrical precipitator embodying the present invention.
  • a rapping mechanism ice outer casing and fastened to and rotating with the shaft of the driving means, has the shape of a truncated cone, the open end of which diverges towards the interior of the electrical precipitator.
  • a scraping iron 7 projects into the cone and is secured onto the precipitator 5.
  • the scraping iron 7 has a length substantially equal to the length of a side wall of the cone and is mounted obliquely in relation to the generatrix of the inner surface and in scraping engagement therewith.
  • an electrical precipitator including a side wall having an opening therein, a rapping mechanism for cleaning emission electrodes in said electrical precipitator, said rapping mechanism comprising a rotatable shaft extending into said precipitator through said opening, at least one hammer connected to said rotatable shaft in said precipitator for striking said emission electrodes upon rotation of said shaft, driving means outside said precipitator for rotating said shaft, an intermediate insulating shaft connecting said driving means to said shaft, an outer casing enclosing said insulating shaft and closing said opening to prevent dust leakage out of said precipitator, an inner casing having substantially the shape of an open ended truncated cone diverging towards the interior of said precipitator and connected to and rotating with said driving means, said inner casing being located within said outer casing, and a scraping iron mounted on said precipitator in scraping engagement With the inner surface of said inner casing thereby preventing dust accumulation on said inner surface upon rotation of said shaft, said inner casing positioned with its open end adjacent said opening whereby dust removed by said iron falls into said

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrostatic Separation (AREA)
US230561A 1961-10-27 1962-10-15 Arrangement in rapping mechanisms for emission electrodes in electrical precipitators Expired - Lifetime US3183648A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1072661 1961-10-27

Publications (1)

Publication Number Publication Date
US3183648A true US3183648A (en) 1965-05-18

Family

ID=20292757

Family Applications (1)

Application Number Title Priority Date Filing Date
US230561A Expired - Lifetime US3183648A (en) 1961-10-27 1962-10-15 Arrangement in rapping mechanisms for emission electrodes in electrical precipitators

Country Status (4)

Country Link
US (1) US3183648A (da)
CH (1) CH388271A (da)
DK (1) DK105808C (da)
GB (1) GB999021A (da)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4036610A (en) * 1975-05-23 1977-07-19 Elex A.G. Rapping shaft drive assembly for electrostatic precipitators
US4769049A (en) * 1987-04-14 1988-09-06 United Mcgill Corporation Side rapping drag hammer apparatus for electrostatic precipitators

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3441375A1 (de) * 1984-11-13 1986-05-22 Metallgesellschaft Ag, 6000 Frankfurt Wellendurchfuehrung

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1122460A (en) * 1911-09-25 1914-12-29 Charles O Anderson Centrifugal drier.
US1253037A (en) * 1914-03-07 1918-01-08 Frederick William Horstmann Centrifugal separator.
US1463352A (en) * 1921-09-19 1923-07-31 Int Precipitation Co Apparatus for the electrical precipitation of suspended particles from gases
DE427537C (de) * 1926-04-10 Siemens Schuckertwerke G M B H Schuettelvorrichtung fuer elektrische Gasreinigungsanlagen
DE490186C (de) * 1927-10-19 1930-01-27 Metallgesellschaft Ag Verfahren zum Abreinigen der Rohrelektroden elektrischer Gasreiniger
DE505794C (de) * 1929-07-10 1930-08-27 Metallgesellschaft Ag Vorrichtung zum Abreinigen der Elektroden elektrischer Gasreiniger durch Erschuettern mittels eines Schlagwerkzeuges
FR713691A (fr) * 1930-03-24 1931-10-31 Perfectionnements apportés aux appareils électrostatiques pour la séparation, parionisation, des poussières en suspension dans un fluide
US1903298A (en) * 1929-07-26 1933-04-04 Roberts Eugene Centrifugal machine
DE565152C (de) * 1929-07-02 1933-10-17 Siemens Schuckertwerke Akt Ges Verfahren zur Saeuberung der Spruehelektroden von elektrischen Gasreinigern
US2547573A (en) * 1949-04-18 1951-04-03 Research Corp Rapper for electrical precipitation apparatus
US2694464A (en) * 1951-02-09 1954-11-16 Research Corp Electrical precipitator
US2864459A (en) * 1955-10-24 1958-12-16 Svenska Flaektfabriken Ab Rapping system for electrofilters

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK88268C (da) * 1955-10-24 1959-12-14 Svenska Flaektfabriken Ab Anordning ved slagværker for emissionselektroder i elektrofiltre.

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE427537C (de) * 1926-04-10 Siemens Schuckertwerke G M B H Schuettelvorrichtung fuer elektrische Gasreinigungsanlagen
US1122460A (en) * 1911-09-25 1914-12-29 Charles O Anderson Centrifugal drier.
US1253037A (en) * 1914-03-07 1918-01-08 Frederick William Horstmann Centrifugal separator.
US1463352A (en) * 1921-09-19 1923-07-31 Int Precipitation Co Apparatus for the electrical precipitation of suspended particles from gases
DE490186C (de) * 1927-10-19 1930-01-27 Metallgesellschaft Ag Verfahren zum Abreinigen der Rohrelektroden elektrischer Gasreiniger
DE565152C (de) * 1929-07-02 1933-10-17 Siemens Schuckertwerke Akt Ges Verfahren zur Saeuberung der Spruehelektroden von elektrischen Gasreinigern
DE505794C (de) * 1929-07-10 1930-08-27 Metallgesellschaft Ag Vorrichtung zum Abreinigen der Elektroden elektrischer Gasreiniger durch Erschuettern mittels eines Schlagwerkzeuges
US1903298A (en) * 1929-07-26 1933-04-04 Roberts Eugene Centrifugal machine
FR713691A (fr) * 1930-03-24 1931-10-31 Perfectionnements apportés aux appareils électrostatiques pour la séparation, parionisation, des poussières en suspension dans un fluide
US2547573A (en) * 1949-04-18 1951-04-03 Research Corp Rapper for electrical precipitation apparatus
US2694464A (en) * 1951-02-09 1954-11-16 Research Corp Electrical precipitator
US2864459A (en) * 1955-10-24 1958-12-16 Svenska Flaektfabriken Ab Rapping system for electrofilters

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4036610A (en) * 1975-05-23 1977-07-19 Elex A.G. Rapping shaft drive assembly for electrostatic precipitators
US4769049A (en) * 1987-04-14 1988-09-06 United Mcgill Corporation Side rapping drag hammer apparatus for electrostatic precipitators

Also Published As

Publication number Publication date
CH388271A (fr) 1965-02-28
GB999021A (en) 1965-07-21
DK105808C (da) 1966-11-14

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