US3707828A - Precipitator cell - Google Patents

Precipitator cell Download PDF

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Publication number
US3707828A
US3707828A US00049443A US3707828DA US3707828A US 3707828 A US3707828 A US 3707828A US 00049443 A US00049443 A US 00049443A US 3707828D A US3707828D A US 3707828DA US 3707828 A US3707828 A US 3707828A
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US
United States
Prior art keywords
ionizing
polarity
support
electrodes
ionizer
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
US00049443A
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English (en)
Inventor
I Burney
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AMERICAN DAVIDSON Inc
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Westinghouse Electric Corp
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Publication date
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Publication of US3707828A publication Critical patent/US3707828A/en
Assigned to AMERICAN DAVIDSON, INC. reassignment AMERICAN DAVIDSON, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: WESTINGHOUSE ELECTRIC CORPORATION
Anticipated expiration legal-status Critical
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
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/04—Plant or installations having external electricity supply dry type
    • B03C3/12—Plant or installations having external electricity supply dry type characterised by separation of ionising and collecting stations

Definitions

  • ABSTRACT A precipitator cell is provided with a plurality of [52] US. Cl. ..55/l38, 55/143, 55/145, spaced alternately oppositely charged collecting plate 55/147, 55/148, 55/151, 55/154, 211/153 electrodes with certain spaced ones of the electrodes [51] Int.
  • Cantilever spring support [56] References Cited means of electrically conductive sheet material are connected at their bases from respective ones of the UNITED STATES PATENTS electrodes of the other polarity so as to have their 2,160,044 5/1939 Warren ..ss/1so ux I free-ends camilevefed the ionizing Zones- 2,973,055 2/1961 Aitkenhead Ionizing wires are connected under tension between 2,796,948 6/1957 Fields the spring support means to span the ionizing zones 2,987,137 6/1961 Brixius et al.. between the extension of the plate electrodes of the 3,016,980 1/1962 Gonzalez one polarity.
  • Precipitator cells of the type having a plurality of spaced alternately oppositely charged collecting plate electrodes are well known and such cells are generally arranged to have ionizing zones ahead of the collecting plates against the direction of the gas flow through the cell.
  • the ionizing zones are formed between extensions of some of the plate electrodes having the same charge of one polarity.
  • a plurality of respective ionizing wires to be charged with the other polarity are each supported to be spanned between the plate electrode extensions forming the ionizing zones.
  • the supporting structures for the wires should be simple and economical to manufacture and yet should be able to maintain the required resilience forproper tension of the ionizing wire over the useful life of the cell. Since the supporting structures for the ionizing wires are themselves effectively a dead zone ionizing region, I have found that it is desirable for the frontal profile of the supporting elements to be shaped toprovide a baffling of the gas flow in the dead zone region.
  • a wire support is t formed of resilient sheet electrically conductive material such as stainless steel or the like.
  • Each support is of a cantilever spring arrangement supported; by a spring clip at its base and cantilevered out over the ionizing zones from respective ones of the electrodes having the other polarity with respect to the polarity of the projecting plates forming the ionizing zones.
  • each support extends over more than one ionizing zone to support a respective ionizing wire for each respective ionizing zone, thus accurately locating the ionizing wires relative to each other and the associated ionizlng plate electrodes.
  • the support base is preferably attached to an inwardly extending slot on the edge of the associated plate electrode.
  • the cantilevered portions of the spring support are shaped to form spring fingers tapering from a wide base to a narrow tip at which the ionizing wires are removably secured.
  • the tapered shape of each spring finger thus formed is effective to provide a flexing portion which approximates a constant stress spring for long life.
  • the tapered shape of the spring finger forms a frontal profile for the support strip that helps in baffling the air flow around the support finger which is effectively a dead zone for ionizing purposes.
  • FIG. 1 is a sectional view of the line I-I of FIG. 2 as seen in the direction of the arrows transverse to the air flow:
  • FIG. 2 is a fragmentary top plan view partly broken away in section
  • FIG. 3 is a perspective elevational view of one of the spring support members of the invention.
  • FIG. 4 is a fragmentary detailed view showing how a spring support member is supported on an associated one of the plate electrodes to extend out over the ionizing zone.
  • each end of the precipitator cell is provided with an end supporting structure such as shown at 10 to which are bolted the supporting and spacing rods for the collecting plates in the assembled relation.
  • the rods such as shown at 11 and 12 are supported on suitable insulators such as shown at 13 to be charged with a polarity opposite to the polarity of the end plate supporting structure 10.
  • Others of the supporting rods such as shown at 14 and 15 are connected directly to the end plate supporting structure 10 and are therefore arranged to be electrically charged the same as the end plate structure 10.
  • a plurality of collecting plates are secured to the respective support rods l1, 12, 14 and 15 in a fashion such that alternate ones of the plates such as shown at 16 and 17 are charged with opposite polarity.
  • the plate electrode 17 is secured to the support bolt 14 by means of the spacer collar or sleeve 18.
  • the electrode 17 assumes the charge with the polarity of the support bolt 18 and the end supporting structure 10.
  • alternate ones of the collecting plates, such as the collecting plate 16 are secured to the bolt 11 by means of the spacing sleeve or collar 19 and assumes a charge with the polarity corresponding to the polarity of the rod 1 1 that is supported on the insulating structure 13 from the supporting end structure 10.
  • An electrical lead may be connected from the rods such as rods 11 and 12 to the precipitator power supply having a high voltage direct current of one polarity with the other polarity of the power supply being connected to the end structure 10 through an electrical lead (not shown).
  • the collecting plates of one polarity such as the collecting plates shown at 17 are provided with apertures such as shown at 21 through which the charged supporting rod 11 of the opposite polarity extends.
  • each of the collecting plates charged with the other polarity such as collecting plate 16 are provided with an aperture such as shown at 22 through which the supporting rod 14 which is charged to the one polarity extends.
  • a stack of spaced charged collecting plate electrodes with alternate one of the collecting plates having opposite polarity charges is formed through which gas may flow for precipitating contaminants on the collecting plates when the contaminant particles in the gas are suitably charged by ionization or the like.
  • a plurality of ionizing zones such as those shown at 30, 40 and 50 are provided.
  • Each ionizing zone such as the zone 40 is formed in the space between charged electrodes such as electrodes 41 and 42 projecting beyond the majority of the plates in the cell.
  • the projecting plate portions 41 and 42 are of the same polarity charge since they are extensions of plates that are supported on the support rod 14 and insulated from the support rods such as the support rods 11 and 12.
  • a plurality of ionizing wires are arranged to be disposed with a respective wire in a respective ionizing zone such as the ionizing wire 43 for zone 40.
  • each ionizing wire is supported under tension to span the ionizing zone centrally between the ionizing plates and of course each ionizing wire should be charged with a polarity opposite to the polarity of the respective ionizing zone plates 41, 42, etc.
  • a supporting structure for the respective ionizing wires such as the wires 33, 43 and 53 is comprised of upper and lower supporting members such as the member 60 shown by FIG. 3 of the drawing.
  • the lower support member is shown at 70 by FIG. 1 of the drawing.
  • Each support member 60, 70 is substantially identical and is formed of a resilient sheet material of electrically conductive nature such as stainless steel or the like.
  • the sheet material is formed with a base spring clip 68 most clearly shown by FIGS. 3 and is adapted to be received in the respective electrode plate slots such as shown at 62 (FIG. 4).
  • Those plate electrodes such as electrode 41a having the supporting slots for the spring support 60 are selected to have the same polarity of charge which is opposite to the polarity of charge of the charge of the plates such as 41, 42 forming the ionizing zone.
  • the spring support member 60 is supported from electrodes 16, 17a, 41a and 42a while the electrodes 17, 41, 41b and 42 are notched such as shown at 45 to provide a clearance for the base 61 of the spring support 60.
  • the lower spring support 70 is supported within suitable slots of selected ones of the collecting plates having the same polarity charge that is opposite the polarity of the electrode plate extensions.
  • each support member such as the member 60
  • each support member is formed with a plurality of spring fingers 61-67 projecting from a wide base portion adjacent the base 68 to taper to a narrow pointed end overlying the respective associated ionizing zone in the assembled relation.
  • Each tapered end of the spring finger such as spring finger 61
  • the ionizing wire is precut to a desired length and provided with crimped ends or hat members such as shown at 42a.
  • each respective spring finger, 61-67 provides a flexing portion approximating a constant stress spring.
  • the particular tapered shape for the spring finger provides an effective baffling for the gas flow through the precipitator cell in the region of the ionization dead zone that is inherent adjacent to the spring finger structure.
  • An electrostatic precipitator cell having a plurality of spaced collecting plate electrodes with alternate electrodes adapted to have opposite polarity charges, regularly spaced ones of these electrodes having the same charge of one polarity being projected beyond the remainder of said plates in the direction against the direction of gas flow through the precipitator to form ionizing zones, upper and lower ionizer wire spring support means for receiving, locating and supporting ionizer wires under tension, each said support means formed of electrically conductive resilient sheet material and having a base portion and a cantilevered ionizer support portion extending therefrom along substantially the whole length of each respective base portion, each of the base portions being formed from the respective sheet material as a depending spring clip extending substantially the whole length of the respective base portion, support means spanning more than one of said ionizing zones, said plate electrodes of the other polarity charge being provided with upper and lower inwardly extending edge slots receiving therein respectively the depending spring clip base portion of the respective upper and lower support means in supporting and electrically conductive relation, and a plurality of
  • each support is shaped as spring fingers of tapered form from a wide base to a narrow tip over each ionizing zone.
  • each support is shaped as spring fingers of tapered form from a wide base to a narrow tip over 5 each ionizing zone.

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  • Electrostatic Separation (AREA)
US00049443A 1970-06-24 1970-06-24 Precipitator cell Expired - Lifetime US3707828A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US4944370A 1970-06-24 1970-06-24

Publications (1)

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US3707828A true US3707828A (en) 1973-01-02

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US00049443A Expired - Lifetime US3707828A (en) 1970-06-24 1970-06-24 Precipitator cell

Country Status (3)

Country Link
US (1) US3707828A (enrdf_load_stackoverflow)
CA (1) CA946754A (enrdf_load_stackoverflow)
GB (1) GB1306314A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3997304A (en) * 1975-03-28 1976-12-14 Carrier Corporation Mounting system of ionizing wires of electrostatic precipitator
US4026684A (en) * 1975-09-15 1977-05-31 Klykon, Inc. Air filtration cassette with electrostatic precipitator and having multiple filter elements
US4089661A (en) * 1977-01-12 1978-05-16 Emerson Electric Co. Two stage electrostatic precipitator
US4240811A (en) * 1978-06-22 1980-12-23 Elfi Elektrofilter Ab Fixing and connecting device for wires and plates in electrostatic filters
US4259093A (en) * 1976-04-09 1981-03-31 Elfi Elektrofilter Ab Electrostatic precipitator for air cleaning
US5421863A (en) * 1992-09-11 1995-06-06 Trion, Inc. Self-cleaning insulator for use in an electrostatic precipitator
CN107243413A (zh) * 2017-07-31 2017-10-13 苏州安岢栎热能科技有限公司 一种高效稳定型静电除尘器
CN108940590A (zh) * 2018-05-23 2018-12-07 合肥正特机械有限公司 一种利用电场吸附的油烟净化装置

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2160044A (en) * 1938-01-27 1939-05-30 M O Valve Co Ltd Electrode spacer
US2796948A (en) * 1955-05-04 1957-06-25 Westinghouse Electric Corp Electrostatic precipitators
US2973055A (en) * 1957-08-28 1961-02-28 Electro Air Cleaner Company In Electronic air cleaner
US2987137A (en) * 1955-01-25 1961-06-06 Rockwell Standard Co Particle charging apparatus for electrostatic filter
US3016980A (en) * 1959-03-09 1962-01-16 American Air Filter Co Electrostatic precipitator
US3040498A (en) * 1958-02-04 1962-06-26 Edward M Berly Electrostatic precipitator
US3073094A (en) * 1960-05-23 1963-01-15 Trion Inc Electrostatic filter panel
US3149937A (en) * 1961-10-31 1964-09-22 American Air Filter Co Plate electrode assembly
US3404785A (en) * 1966-05-27 1968-10-08 Gilford Instr Labor Inc Panel board retaining clip
US3473097A (en) * 1968-09-23 1969-10-14 Simco Co Inc The Ionized gas electrostatic copyboard

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2160044A (en) * 1938-01-27 1939-05-30 M O Valve Co Ltd Electrode spacer
US2987137A (en) * 1955-01-25 1961-06-06 Rockwell Standard Co Particle charging apparatus for electrostatic filter
US2796948A (en) * 1955-05-04 1957-06-25 Westinghouse Electric Corp Electrostatic precipitators
US2973055A (en) * 1957-08-28 1961-02-28 Electro Air Cleaner Company In Electronic air cleaner
US3040498A (en) * 1958-02-04 1962-06-26 Edward M Berly Electrostatic precipitator
US3016980A (en) * 1959-03-09 1962-01-16 American Air Filter Co Electrostatic precipitator
US3073094A (en) * 1960-05-23 1963-01-15 Trion Inc Electrostatic filter panel
US3149937A (en) * 1961-10-31 1964-09-22 American Air Filter Co Plate electrode assembly
US3404785A (en) * 1966-05-27 1968-10-08 Gilford Instr Labor Inc Panel board retaining clip
US3473097A (en) * 1968-09-23 1969-10-14 Simco Co Inc The Ionized gas electrostatic copyboard

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3997304A (en) * 1975-03-28 1976-12-14 Carrier Corporation Mounting system of ionizing wires of electrostatic precipitator
US4026684A (en) * 1975-09-15 1977-05-31 Klykon, Inc. Air filtration cassette with electrostatic precipitator and having multiple filter elements
US4259093A (en) * 1976-04-09 1981-03-31 Elfi Elektrofilter Ab Electrostatic precipitator for air cleaning
US4089661A (en) * 1977-01-12 1978-05-16 Emerson Electric Co. Two stage electrostatic precipitator
US4240811A (en) * 1978-06-22 1980-12-23 Elfi Elektrofilter Ab Fixing and connecting device for wires and plates in electrostatic filters
US5421863A (en) * 1992-09-11 1995-06-06 Trion, Inc. Self-cleaning insulator for use in an electrostatic precipitator
CN107243413A (zh) * 2017-07-31 2017-10-13 苏州安岢栎热能科技有限公司 一种高效稳定型静电除尘器
CN108940590A (zh) * 2018-05-23 2018-12-07 合肥正特机械有限公司 一种利用电场吸附的油烟净化装置

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Publication number Publication date
CA946754A (en) 1974-05-07
GB1306314A (enrdf_load_stackoverflow) 1973-02-07

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Owner name: AMERICAN DAVIDSON, INC., 8111 TIREMAN AVENUE, DEAR

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WESTINGHOUSE ELECTRIC CORPORATION A CORP OF PA;REEL/FRAME:004386/0282

Effective date: 19841219