US3853511A - Electrical precipitating apparatus - Google Patents

Electrical precipitating apparatus Download PDF

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Publication number
US3853511A
US3853511A US00226856A US22685672A US3853511A US 3853511 A US3853511 A US 3853511A US 00226856 A US00226856 A US 00226856A US 22685672 A US22685672 A US 22685672A US 3853511 A US3853511 A US 3853511A
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United States
Prior art keywords
gas
passageway
housing
electrodes
spaced
Prior art date
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Expired - Lifetime
Application number
US00226856A
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English (en)
Inventor
X Huppi
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Elex AG
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Elex AG
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Publication date
Application filed by Elex AG filed Critical Elex AG
Priority to US00226856A priority Critical patent/US3853511A/en
Priority to CH1693572A priority patent/CH543899A/de
Priority to JP47121697A priority patent/JPS4894066A/ja
Priority to FR7244037A priority patent/FR2172089B1/fr
Priority to CA162,319A priority patent/CA974463A/en
Priority to GB444873A priority patent/GB1413391A/en
Priority to DE19732307508 priority patent/DE2307508A1/de
Application granted granted Critical
Publication of US3853511A publication Critical patent/US3853511A/en
Assigned to WOODS KATHLEEN D., AS TRUSTEE, CONNECTICUT NATIONAL BANK THE, A NATIONAL BANKING ASSOCIATION AS TRUSTEE reassignment WOODS KATHLEEN D., AS TRUSTEE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ALLIS-CHALMERS CORPORATION A DE CORP.
Assigned to CITICORP NORTH AMERICA, INC. reassignment CITICORP NORTH AMERICA, INC. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SNYDERGENERAL CORPORATION, A MN CORP.
Anticipated expiration legal-status Critical
Assigned to SNYDERGENERAL CORPORATION A CORP. OF DELAWARE reassignment SNYDERGENERAL CORPORATION A CORP. OF DELAWARE RELEASE BY SECOND PARTY OF A SECURITY AGREEMENT RECORDED AT REEL 5013 FRAME 592. Assignors: CITICORP NORTH AMERICA, INC. A CORP. OF DELAWARE
Expired - Lifetime 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

Definitions

  • ABSTRACT An electrical precipitating apparatus for removing particles from a gas stream having a housing defining a passageway for the gas stream and containing an electrode system therein comprised of discharge and collecting electrodes, which coact to effect precipitation of charged dust particles from the gas stream, the apparatus including baffle means located transverse to the gas passageway in the lower portion of the housing which baffle means extend upwardly beyond the lower end of the discharging electrodes toward the lower end of the collecting electrodes, thereby establishing a positive barrier to undesirable gas flow through the lower portion of the housing.
  • the present invention is directed to electrically precipitating suspended particles from a dirty gas stream. More specifically, it is concerned with improvements in an apparatus of the type in which the dirty gas stream 'is passed through a charging and collecting electrical field to effect precipitation of charged particles. Since there are only'two types of electrodes defining one electrical field within the apparatus, the apparatus is termed a single stage precipitator.
  • the primary components are discharge electrodes and collecting electrodes.
  • a discharge electrode is an electode which has, at a given point in time, a corona discharge emanating therefrom due to its configuration and high electrical potential.
  • the electrode may have a lower electrical potential and no corona.
  • Such an electrode may be a small diameter wire or a rod provided with sharp edges or points which may function to concentrate electric charges on its surface and thereby cause an electric corona.
  • the present invention is also applicable to two stage precipitators.
  • Two stage precipitators are different from single stage precipitators in that two distinct electrostatic fields are formed, one adjacent discharging electrodes, and the other between precipitating electrodes and collecting electrodes.
  • a precipitating electrode is an electrode which is maintained at an electrial potential, but minimizes or suppresses corona discharge therefrom.
  • Such a precipitating electrode is generally of a configuration which is free from sharp corners, edges, or points.
  • a precipitating electrode is maintained at a voltage which is less than the voltage of a corresponding discharge electrode. The particles to be removed are charged by a corona discharge near the discharge electrode and travel into the field of the precipitating electode where they are precipitated on a non-discharging collecting electrode.
  • an electrode system in the passageway comprising a grounded collecting electrode structure and a high voltage discharge structure
  • the discharge electrode structure includes vertically disposed discharge electrodes spaced longitu dinally from the gas passageway and creating charging fields extending trasversly of the gas passageway in longitudinally spaced vertical planes.
  • the discharge electrodes can be further defined in that they are maintained in their relative positions by weights secured to their ends. The weights are separated and positively positioned with respect to one another by a spacing frame having a dividing slot therein.
  • the apparatus also contains baffle means transverse to the gas stream which extends upwardly through the dividing slot in the discharging electrode spacing frame at least to the horizontal plane defined by the lower edges of the gas inlet and the gas outlet, toward the lower edges of the collecting electrodes.
  • the apparatus can be further defined in that the distance between the baffle means and the discharge electrode weights and spacing frame is such that there is no arcing therebetween.
  • the electrical precipitating apparatus of this invention has been found to be effective in reducing the overall dust particle concentration over the prior art accepted level.
  • particle removal from a gas stream can be effected in a variety of ways. Each of such ways will have a lower limit.
  • it is important to realize that to go beyond the various lower limits and obtain a super-clean gas stream is extremely difficult.
  • the present invention provides a straightforward, inexpensive, readily constructed and easily maintained apparatus for electrical precipitation of dust particles to a concentration lower than heretofore thought possible.
  • FIG. 1 is a cross-sectional elevational view of the electrical precipitating apparatus of this invention.
  • Housing 10 includes opposed gas inlet 11 and gas outlet 12 which define a gas passageway A therebetween in housing 10 through which dirty gas travels.
  • Gas inlet 11 and gas outlet 12 are equal in size and are located on opposite sides of housing 10.
  • Gas inlet 11 and gas outlet 12 have their lower respective edges 14 and 16 lying in the same or common horizontal plane.
  • Housing 10 further includes in its lowermost portion, hopper 17 and disposed thereabove in gas passageway A of housing 10 is an electrode system 18.
  • Electrode system 18 includes grounded collecting electrodes 22 which extend longitudinally in spaced planes parallel the direction of gas flow and high tension discharge electrodes 24 which extend in successively spaced relation to provide spaced rows of discharge electrodes be tween the spaced rows of collecting electrodes 22.
  • Discharge electrodes 24 are suspended from the upper portion of housing 10 by suspension means 19. Collecting electrodes 22 are supported by rapping bars 32 and 30 which rest on electrode ledge support means 21 fastened at their extremities to housing 10. Discharge electrodes 24 cause a charging field to be present within housing 10. Discharge electrodes 24 terminate at their lower ends in discharge electrode weight 28. It is to be noted that discharge electrode weights 28 are spaced equidistant from one another by a suitable, substantially rigid spacing frame 29. Spacing frame 29 has a dividing slot 31 therein. Dividing slot 31 divides spacing frame 29 into two equal sized segments. The,
  • Housing additionally contains vertical baffle means 33 which extends from the lowermost portion of hopper 17 upward transverse to the air flow path A toward rapping means member 30.
  • baffle means 33 passes between dividing slot 31, so as to be spaced at a distance which is calculated to insure that no arcing will occur between the discharge electrodes 24 or discharge electrode weights 28 or the spacing frame 29.
  • dirty gas enters dirty gas inlet 11 and passes through passageway A where it is cleaned by electrode system 18 and ultimately passes through gas outlet 12.
  • Cleaning is effected by the electrostatic precipitator apparatus disclosed herein in a manner which is disclosed and understood by the prior art. Briefly, the particles of dust in the gas stream are ionized when they pass into the charging field which surrounds discharge electrodes 24. These charged particles are carried along in the air stream until they encounter one of collecting electrodes 22. The collecting electrical field adjacent collecting electrodes 22 is strong enough to cause the charged particles to be attracted thereto. The particles deposit upon collecting electrodes 22 to be later removed. Such removal may be effected by rapping, vacuuming, or scrubbing collecting electrodes 22. Rapping bar means members are shown in FIG. 1. They are activated by an activation system not shown. The removed particles fall into hopper l7 where they are collected and retained until outlet 34 is opened and hopper 17 is emptied.
  • the concentration of particles which are contained in the gas passing along the rapping means members 30 and 32 just outside of passageway A is much greater than the concentration of particles in the cleaned gas which passes along lower rapping means member 30.
  • Applicant has successfully reduced the concentration of dust particles in the gas passing along lower rapping means member 30 by providing baffle means 33 which extend upwardly from the lowermost portion of hopper 17 through dividing slot 31 beyond discharge electrode weights 28 to contact rapping means member 30. It is important to note that inlet 11 and outlet 12 have their lower edges 14 and 16 lying in the same horizontal plane through housing 10. Rapping means member 30 can then be movably secured to these lower edges and baffle means 33 can extend upwardly to slidably engage the lower side of rapping means member 30. Such anarrangement affords a positive reduction in the concentration of dust particles since it essentially blocks off any air flow stream below the active portion of electrode system 18. This reduction in dust concentration can only be accomplished if dividing slot 31 is employed to provide access through spacing frame 29.
  • any gas circulating means can be used to move the dirty air through housing 10.
  • a fan or other blower would be connected to inlet 11 or outlet 12 to move air to be cleaned in a horizontal direction through housing 10.
  • a stack gas stream would be passed through housing 10 to be cleaned.
  • An electrical precipitating apparatus for removing suspended particles from a gas comprising: a housing having an opposed gas inlet and a gas outlet and defining a passageway for a stream of gas; the lower portion of said housing defining a hopper below said passageway with the lower edges of the gas inlet and gas outlet lying substantially in a common horizontal plane; an electrode system in said passageway including grounded collecting electrodes supported by rapping bars at both the top and bottom thereof said top supporting rapping bars resting on electrode ledge support means attached to said housing and said bottom supporting rapping bars also attached to said housing and extending to the plane defined by said lower edge of said gas inlet and outlet, said collecting electrodes extending longitudinally in spaced planes parallel to the direction of gas flow through said passageway, said electrode system further including high voltage discharge electrodes extending longitudinally in said passageway parallel with and transversely spaced from said collecting electrodes in successive relationship to provide spaced rows of discharge electrodes between the spaced rows of collecting electrodes, said discharge electrodes being spaced longitudinally of said gas passageway and creating charging fields

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  • Electrostatic Separation (AREA)
US00226856A 1972-02-16 1972-02-16 Electrical precipitating apparatus Expired - Lifetime US3853511A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US00226856A US3853511A (en) 1972-02-16 1972-02-16 Electrical precipitating apparatus
CH1693572A CH543899A (de) 1972-02-16 1972-11-21 Elektrischer Ausfällapparat zur Entfernung von in einem Gas schwebenden Teilchen
JP47121697A JPS4894066A (en)) 1972-02-16 1972-12-06
FR7244037A FR2172089B1 (en)) 1972-02-16 1972-12-11
CA162,319A CA974463A (en) 1972-02-16 1973-01-29 Electrical precipitating apparatus
GB444873A GB1413391A (en) 1972-02-16 1973-01-29 Electrical precipitating apparatus
DE19732307508 DE2307508A1 (de) 1972-02-16 1973-02-15 Elektrische ausfaellvorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00226856A US3853511A (en) 1972-02-16 1972-02-16 Electrical precipitating apparatus

Publications (1)

Publication Number Publication Date
US3853511A true US3853511A (en) 1974-12-10

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Application Number Title Priority Date Filing Date
US00226856A Expired - Lifetime US3853511A (en) 1972-02-16 1972-02-16 Electrical precipitating apparatus

Country Status (7)

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US (1) US3853511A (en))
JP (1) JPS4894066A (en))
CA (1) CA974463A (en))
CH (1) CH543899A (en))
DE (1) DE2307508A1 (en))
FR (1) FR2172089B1 (en))
GB (1) GB1413391A (en))

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3951624A (en) * 1974-11-22 1976-04-20 Koppers Company, Inc. Electrostatic precipitator
US4026683A (en) * 1975-11-20 1977-05-31 Environmental Elements Corporation Inlet duct and hopper apparatus for electrostatic precipitators
US4126434A (en) * 1975-09-13 1978-11-21 Hara Keiichi Electrostatic dust precipitators
US4968330A (en) * 1989-09-01 1990-11-06 Fmc Corporation Apparatus for separating particulates in an electrostatic precipitator
RU2211093C2 (ru) * 2001-09-10 2003-08-27 Закрытое акционерное общество "Кондор-Эко" Горизонтальный многопольный электрофильтр
RU2248837C1 (ru) * 2004-04-30 2005-03-27 ЗАО "Кондор-Эко" Пылеулавливающий аппарат
CN100560217C (zh) * 2005-03-04 2009-11-18 宋小良 导电玻璃钢电除雾器用阴极系统
US20140305301A1 (en) * 2012-01-26 2014-10-16 Alstom Technology Ltd Rapping an electrostatic precipitator
CN106111341A (zh) * 2016-08-31 2016-11-16 贵阳铝镁设计研究院有限公司 卧式无旁路电除尘器及其方法
US11260401B2 (en) * 2018-10-01 2022-03-01 DOOSAN Heavy Industries Construction Co., LTD Dust collecting module, desulfurizing apparatus having same, and method of installing dust collecting module

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005037993B4 (de) * 2005-08-09 2007-12-27 Steag Encotec Gmbh Elektrofilter für Abgassysteme

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1329237A (en) * 1919-01-06 1920-01-27 Howard I Frisbie Electric precipitator
US1766422A (en) * 1927-11-28 1930-06-24 Research Corp Method and apparatus for electrical precipitation
DE565152C (de) * 1929-07-02 1933-10-17 Siemens Schuckertwerke Akt Ges Verfahren zur Saeuberung der Spruehelektroden von elektrischen Gasreinigern
US2192250A (en) * 1938-08-19 1940-03-05 Research Corp Electrical precipitation apparatus
US2225677A (en) * 1938-12-29 1940-12-24 Research Corp Method and apparatus for electrical precipitation
US2275001A (en) * 1940-07-16 1942-03-03 Western Precipitation Corp Apparatus for electrical precipitation
US2634818A (en) * 1949-12-06 1953-04-14 Research Corp Gas cleaning apparatus
FR1035457A (fr) * 1951-04-16 1953-08-25 Purification Ind Des Gaz Soc D Perfectionnements aux appareils comportant des éléments verticaux pour le dépôt de fines particules telles que des poussières
US3354617A (en) * 1966-10-14 1967-11-28 American Standard Inc Corona shield for ionizer wires
US3444668A (en) * 1964-03-06 1969-05-20 Onoda Cement Co Ltd Apparatus for electrostatic precipitation of dust
US3509695A (en) * 1965-07-21 1970-05-05 Cottrell Res Inc Wet bottom precipitator

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1340845A (fr) * 1962-07-10 1963-10-25 Svenska Flaektfabriken Ab Dépoussiéreur électrostatique
FR1518454A (fr) * 1967-04-12 1968-03-22 Lodge Cottrell Ltd Perfectionnements aux appareils de précipitation électrostatique
JPH087983Y2 (ja) * 1990-04-17 1996-03-06 福伸電機株式会社 スポット溶接機用チップドレッサ

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1329237A (en) * 1919-01-06 1920-01-27 Howard I Frisbie Electric precipitator
US1766422A (en) * 1927-11-28 1930-06-24 Research Corp Method and apparatus for electrical precipitation
DE565152C (de) * 1929-07-02 1933-10-17 Siemens Schuckertwerke Akt Ges Verfahren zur Saeuberung der Spruehelektroden von elektrischen Gasreinigern
US2192250A (en) * 1938-08-19 1940-03-05 Research Corp Electrical precipitation apparatus
US2225677A (en) * 1938-12-29 1940-12-24 Research Corp Method and apparatus for electrical precipitation
US2275001A (en) * 1940-07-16 1942-03-03 Western Precipitation Corp Apparatus for electrical precipitation
US2634818A (en) * 1949-12-06 1953-04-14 Research Corp Gas cleaning apparatus
FR1035457A (fr) * 1951-04-16 1953-08-25 Purification Ind Des Gaz Soc D Perfectionnements aux appareils comportant des éléments verticaux pour le dépôt de fines particules telles que des poussières
US3444668A (en) * 1964-03-06 1969-05-20 Onoda Cement Co Ltd Apparatus for electrostatic precipitation of dust
US3509695A (en) * 1965-07-21 1970-05-05 Cottrell Res Inc Wet bottom precipitator
US3354617A (en) * 1966-10-14 1967-11-28 American Standard Inc Corona shield for ionizer wires

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Electrostatic Precipitators by Western Precipitation, Catalog Number P138, Western Precipitation Group, Joy Manufacturing Company, 1000 W. 9th Street, Los Angeles, Calif. 90015, 12 pages received in Patent Office Oct. 16, 1968. *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3951624A (en) * 1974-11-22 1976-04-20 Koppers Company, Inc. Electrostatic precipitator
US4126434A (en) * 1975-09-13 1978-11-21 Hara Keiichi Electrostatic dust precipitators
US4026683A (en) * 1975-11-20 1977-05-31 Environmental Elements Corporation Inlet duct and hopper apparatus for electrostatic precipitators
US4968330A (en) * 1989-09-01 1990-11-06 Fmc Corporation Apparatus for separating particulates in an electrostatic precipitator
RU2211093C2 (ru) * 2001-09-10 2003-08-27 Закрытое акционерное общество "Кондор-Эко" Горизонтальный многопольный электрофильтр
RU2248837C1 (ru) * 2004-04-30 2005-03-27 ЗАО "Кондор-Эко" Пылеулавливающий аппарат
CN100560217C (zh) * 2005-03-04 2009-11-18 宋小良 导电玻璃钢电除雾器用阴极系统
US20140305301A1 (en) * 2012-01-26 2014-10-16 Alstom Technology Ltd Rapping an electrostatic precipitator
US9566588B2 (en) * 2012-01-26 2017-02-14 General Electric Technology Gmbh Rapping an electrostatic precipitator
CN106111341A (zh) * 2016-08-31 2016-11-16 贵阳铝镁设计研究院有限公司 卧式无旁路电除尘器及其方法
US11260401B2 (en) * 2018-10-01 2022-03-01 DOOSAN Heavy Industries Construction Co., LTD Dust collecting module, desulfurizing apparatus having same, and method of installing dust collecting module

Also Published As

Publication number Publication date
FR2172089B1 (en)) 1977-04-08
CA974463A (en) 1975-09-16
FR2172089A1 (en)) 1973-09-28
GB1413391A (en) 1975-11-12
CH543899A (de) 1973-11-15
DE2307508A1 (de) 1973-08-30
JPS4894066A (en)) 1973-12-04

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Date Code Title Description
AS Assignment

Owner name: WOODS KATHLEEN D., AS TRUSTEE

Free format text: SECURITY INTEREST;ASSIGNOR:ALLIS-CHALMERS CORPORATION A DE CORP.;REEL/FRAME:004149/0001

Effective date: 19830329

Owner name: CONNECTICUT NATIONAL BANK THE, A NATIONAL BANKING

Free format text: SECURITY INTEREST;ASSIGNOR:ALLIS-CHALMERS CORPORATION A DE CORP.;REEL/FRAME:004149/0001

Effective date: 19830329

AS Assignment

Owner name: CITICORP NORTH AMERICA, INC., NEW YORK

Free format text: SECURITY INTEREST;ASSIGNOR:SNYDERGENERAL CORPORATION, A MN CORP.;REEL/FRAME:005013/0592

Effective date: 19881117

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Owner name: SNYDERGENERAL CORPORATION A CORP. OF DELAWARE

Free format text: RELEASE BY SECOND PARTY OF A SECURITY AGREEMENT RECORDED AT REEL 5013 FRAME 592.;ASSIGNOR:CITICORP NORTH AMERICA, INC. A CORP. OF DELAWARE;REEL/FRAME:006104/0270

Effective date: 19920326