US3200565A - Electrostatic precipitators - Google Patents

Electrostatic precipitators Download PDF

Info

Publication number
US3200565A
US3200565A US208785A US20878562A US3200565A US 3200565 A US3200565 A US 3200565A US 208785 A US208785 A US 208785A US 20878562 A US20878562 A US 20878562A US 3200565 A US3200565 A US 3200565A
Authority
US
United States
Prior art keywords
section
electrodes
rapping
rods
gas
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
US208785A
Other languages
English (en)
Inventor
Gustafsson Stig
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
Application granted granted Critical
Publication of US3200565A publication Critical patent/US3200565A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B03C3/76—Cleaning the electrodes by using a mechanical vibrator, e.g. rapping gear ; by using impact

Definitions

  • the present invention relates to electrostatic precipitators, particularly to a precipitator having horizontal gas ⁇ flow, consisting of one or more sections each comprising a number of rows of freely-suspended fiat electrodes, arranged one after the other parallel to the direction of gas flow, and means for rapping the electrodes clean. It is known to be unavoidable when rapping the electrodes that part of the dust shaken off is discharged with the outgoing gas stream, which often involves great disadvantages. In large precipitators, where the construction often necessitates a division into several Sections, each being independent with respect to its Suspension and power supply, a separate rapping mechanism has been provided for each section in order to eliminate the abovementioned disadvantage.
  • the invention which takes into account the above mentioned fact and is designed to reduce the dust losses into the cleaned gas to a minimum without altering the division into Sections-is characterized in that at least the first section traversed by the gas stream is equipped with double rapping mechanisms mounted on each side of the section, i.e., on the upstream and downstream sides, respectively, and each arranged to separately actuate a separate group of electrodes included in the section.
  • the two rapping mechanisms for the first section of the precipitator are arranged to operate at different times, either out of phase or at different frequencies.
  • the rapper rods of the two mechanisms are located in end-juxtaposed relationship to each other preferably in such position that they act as recoil stops for each other.
  • 1 designates the casing of an electrostatic precipitator constructed for horizontal gas fiow and fitted with an inlet 2 for raw gas and an outlet 3 for cleaned gas.
  • the precipitator is equipped with a number of rows of freely-suspended flat electrodes 4 arranged one after the other parallel to the direction of gas fiow and divided up into three Sections A, B and C.
  • the precipitator is equipped with rapping mechanisms of a design known per se, comprising rapper rods 5 fitted under each row of electrodes and designed to be actuated by a corresponding number 3,2%,555 Patented Aug. 17, 1965 "ice of power rappers or hammers 6 attached to a rotatable shaft 7.
  • the electrodes in the first section (A) are split up into two groups al and :12, as regards Cleaning, and each group is equipped with a separate rapping mechanism.
  • These mechanisms are arranged on each side of the section, i.e., on the upstream and downstream sides, respectively, and are driven so that the rapping on the two groups is at different times; that is, there is either a suitable time interval between the cleaning of groups a1 and a2 or the rapping is at different frequencies.
  • conventional drive means 3 are incorporated in conjunction with the power rapping means to provide either rapping at different times or at a different frequency.
  • An electrostatic precipitator comprising in combination: a casing arranged for the horizontal flow of gas therethrough, a plurality of Sections of electrodes suspended from their upper ends in said casing, each section including a plurality of rows of Vertical elongated generally flat electrodes arranged flat-wise in the direction of gas flow thereover; separate rapping means for each section of electrodes; at least said section which is first traversed by the flow of entering gas being subdivided into two groups; said rapping means for said subdivided section comprising separate end juxtaposed and aligned rapper rods and power rapping means for said rods disposed upstream and downstream respectively of the electrodes of said section; said rapper rods being positioned to engage end-Wise when either is rapped and act as mutual recoil stops for each other.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrostatic Separation (AREA)
US208785A 1961-07-12 1962-07-10 Electrostatic precipitators Expired - Lifetime US3200565A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE722561 1961-07-12

Publications (1)

Publication Number Publication Date
US3200565A true US3200565A (en) 1965-08-17

Family

ID=20270776

Family Applications (1)

Application Number Title Priority Date Filing Date
US208785A Expired - Lifetime US3200565A (en) 1961-07-12 1962-07-10 Electrostatic precipitators

Country Status (3)

Country Link
US (1) US3200565A (da)
DK (1) DK106491C (da)
GB (1) GB990803A (da)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3844742A (en) * 1972-02-18 1974-10-29 Smidth & Co As F L Electrode cleaning mechanism for electrostatic dust precipitator
US4218225A (en) * 1974-05-20 1980-08-19 Apparatebau Rothemuhle Brandt & Kritzler Electrostatic precipitators
US20080202077A1 (en) * 2007-02-27 2008-08-28 Snyder Robert E Assembly for ash separation from flue gas

Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1463352A (en) * 1921-09-19 1923-07-31 Int Precipitation Co Apparatus for the electrical precipitation of suspended particles from gases
DE409941C (de) * 1922-11-10 1925-02-26 Elek Sche Gasreinigungs G M B Verfahren zum Abreinigen der Elektroden bei der elektrischen Gasreinigung durch Ruetteln
US1600496A (en) * 1923-11-28 1926-09-21 Int Precipitation Co Apparatus for electrical precipitation of suspended material from gases
DE469652C (de) * 1925-12-19 1928-12-18 Siemens Schuckertwerke Akt Ges Elektrische Gasreinigungsanlage
US1767265A (en) * 1926-11-29 1930-06-24 Neblett Engineering Company Apparatus for electrical precipitation
US1917522A (en) * 1929-07-01 1933-07-11 Int Precipitation Co Electrical precipitation apparatus
DE565152C (de) * 1929-07-02 1933-10-17 Siemens Schuckertwerke Akt Ges Verfahren zur Saeuberung der Spruehelektroden von elektrischen Gasreinigern
US2198618A (en) * 1938-03-29 1940-04-30 Western Precipitation Corp Electrode rapping mechanism for electric precipitators
US2526715A (en) * 1947-10-25 1950-10-24 Western Precipitation Corp Apparatus for introducing air to insulated electrode structures in electrical precipitators
US2668600A (en) * 1953-04-06 1954-02-09 Research Corp Electrode structure
US2702090A (en) * 1953-06-12 1955-02-15 Research Corp Pipe rapper transmission mechanism
US2812035A (en) * 1955-09-09 1957-11-05 Buell Engineering Company Inc Electrostatic precipitator and a collecting electrode therefor
US2976951A (en) * 1958-10-17 1961-03-28 Koppers Co Inc Electrostatic precipitator
GB888871A (en) * 1959-10-21 1962-02-07 Svenska Flaektfabriken Ab An emission electrode system for electrostatic precipitators
US3086341A (en) * 1959-11-04 1963-04-23 Brandt Herbert Shaking device for electric filters and a method for operating same
US3113852A (en) * 1960-10-06 1963-12-10 Metallgesellschaft Ag Cleaning means for channel-shaped dust collecting electrodes
US3158453A (en) * 1959-10-21 1964-11-24 Svenska Flaektfabriken Ab Emission electrode system

Patent Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1463352A (en) * 1921-09-19 1923-07-31 Int Precipitation Co Apparatus for the electrical precipitation of suspended particles from gases
DE409941C (de) * 1922-11-10 1925-02-26 Elek Sche Gasreinigungs G M B Verfahren zum Abreinigen der Elektroden bei der elektrischen Gasreinigung durch Ruetteln
US1600496A (en) * 1923-11-28 1926-09-21 Int Precipitation Co Apparatus for electrical precipitation of suspended material from gases
DE469652C (de) * 1925-12-19 1928-12-18 Siemens Schuckertwerke Akt Ges Elektrische Gasreinigungsanlage
US1767265A (en) * 1926-11-29 1930-06-24 Neblett Engineering Company Apparatus for electrical precipitation
US1917522A (en) * 1929-07-01 1933-07-11 Int Precipitation Co Electrical precipitation apparatus
DE565152C (de) * 1929-07-02 1933-10-17 Siemens Schuckertwerke Akt Ges Verfahren zur Saeuberung der Spruehelektroden von elektrischen Gasreinigern
US2198618A (en) * 1938-03-29 1940-04-30 Western Precipitation Corp Electrode rapping mechanism for electric precipitators
US2526715A (en) * 1947-10-25 1950-10-24 Western Precipitation Corp Apparatus for introducing air to insulated electrode structures in electrical precipitators
US2668600A (en) * 1953-04-06 1954-02-09 Research Corp Electrode structure
US2702090A (en) * 1953-06-12 1955-02-15 Research Corp Pipe rapper transmission mechanism
US2812035A (en) * 1955-09-09 1957-11-05 Buell Engineering Company Inc Electrostatic precipitator and a collecting electrode therefor
US2976951A (en) * 1958-10-17 1961-03-28 Koppers Co Inc Electrostatic precipitator
GB888871A (en) * 1959-10-21 1962-02-07 Svenska Flaektfabriken Ab An emission electrode system for electrostatic precipitators
US3158453A (en) * 1959-10-21 1964-11-24 Svenska Flaektfabriken Ab Emission electrode system
US3086341A (en) * 1959-11-04 1963-04-23 Brandt Herbert Shaking device for electric filters and a method for operating same
US3113852A (en) * 1960-10-06 1963-12-10 Metallgesellschaft Ag Cleaning means for channel-shaped dust collecting electrodes

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3844742A (en) * 1972-02-18 1974-10-29 Smidth & Co As F L Electrode cleaning mechanism for electrostatic dust precipitator
US4218225A (en) * 1974-05-20 1980-08-19 Apparatebau Rothemuhle Brandt & Kritzler Electrostatic precipitators
US20080202077A1 (en) * 2007-02-27 2008-08-28 Snyder Robert E Assembly for ash separation from flue gas
US7615086B2 (en) * 2007-02-27 2009-11-10 Babcock & Wilcox Power Generation Group, Inc. Assembly for ash separation from flue gas

Also Published As

Publication number Publication date
DK106491C (da) 1967-02-13
GB990803A (en) 1965-05-05

Similar Documents

Publication Publication Date Title
US1882949A (en) Electrical precipitation apparatus
US1888606A (en) Method of and apparatus for cleaning gases
US3200565A (en) Electrostatic precipitators
US3701236A (en) Modularized electrostatic precipitator
US2615529A (en) Electrostatic precipitator
US2829735A (en) Mechanical filters for separating dust from gas
US1790961A (en) Fornia
US3158453A (en) Emission electrode system
US3296778A (en) Cleaning device for dust separating apparatus
US3988130A (en) Electrostatic precipitator with rapper and pneumatic flow blocking
US2717051A (en) Apparatus for removing suspended materials from gas streams
US3116989A (en) Air cleaning apparatus
US1357886A (en) Apparatus for precipitating suspended particles from gases
US1800529A (en) Method and apparatus for electrical precipitation
US2713920A (en) Mechanical dust collector
US3518813A (en) Extended discharge systems for electrostatic precipitators
US1903640A (en) Electrical precipitator
US2925882A (en) Electrostatic precipitators
US3114615A (en) Oscillating shearing device for the removal of precipitated dry dust
JPS6430663A (en) Method of removing dust from dust collecting electrode for electric precipitator
US2903089A (en) Electric precipitator
US3200566A (en) Emission electrode for electrostatic precipitators
US2964125A (en) Electrical precipitator
DE556706C (de) Elektrische Gasreinigungsanlage mit zwei oder mehreren hintereindergeschalteten, wahlweise einzeln in den und aus dem Gasweg schaltbaren Niederschlagsfeldern
US3703799A (en) Discharge electrode tensioning means