US3807140A - Receiving electrode of plate-type electrostatic precipitator - Google Patents

Receiving electrode of plate-type electrostatic precipitator Download PDF

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US3807140A
US3807140A US00228198A US22819872A US3807140A US 3807140 A US3807140 A US 3807140A US 00228198 A US00228198 A US 00228198A US 22819872 A US22819872 A US 22819872A US 3807140 A US3807140 A US 3807140A
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electrode
projections
plate
holes
flat plates
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A Gurvits
V Aleshina
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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
    • B03C3/36—Controlling flow of gases or vapour
    • 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
    • B03C3/47—Collecting-electrodes flat, e.g. plates, discs, gratings

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  • ABSTRACT A receiving electrode of a plate-type electrostatic precipitator comprising electrode projections forming barriers in the path of the dust-laden gas flow, the pro-' .-'-j'ections being provided with through holes.
  • the entire surface of the plate is provided with projections formed by angles fastened rigidly to one side to the plate while the other'side forms a barrier in the path of the gas flow washing it (see, for example, US. Pat. No. 3,125,426, Cl.55l30, USA).
  • Electrodes of plate-type electrostatic precipitators having projections in the shape of right-angled triangles.
  • the base of these rightangled triangles is rigidly fastened to the plate and the projections are also located across the gas flow washing the plate (see, for example, US. Pat. No. 2,826,262, Cl.55-l30, USA).
  • the main disadvantage of the known receiving electrodes is that ina high velocity gas flow, the gas being cleaned creates powerful turbulence which disturbs the stagnant zone and causes the particles of alreadysettled dust to be carried back into the main gas flow which impairs the efficiency of the gas cleaning in the electrostatic precipitators.
  • An object of the invention resides in the provision of a precipitator eliminating the aforesaid disadvantages.
  • Another object of the invention is to increase the efficiency of gas-cleaning of electrostatic precipitators.
  • the above (and other objects) of the invention is accomplished by providing a receiving electrode for the plate-type electrostatic precipitator in the form of a surface washed by a gas flow and provided with projections forming barriers in the path of they gas flow wherein, according to the invention, said projections have through holes for the passage of gas.
  • the projections of the receiving electrode have the shape of a lattice.
  • An advantage of the present invention is that, due to the construction of the electrode with projections having through holes, the already-settled dust is prevented from being carried back into the main gas flow.
  • the lattice shape of the projections ensures a high efficiency for the precipitator and improves the standard of gas cleaning.
  • FIGURE of the drawing is a perspective view diagrammatically illustrating a precipitator with electrodes according to the invention.
  • a receiving electrode consisting of a number of vertical strips 1 provided with projections 2 which have through holes 3. To reduce distortions of the electric field, the ends of the projections 2 have tubular edges 4. Located between the receiving electrodes are corona electrodes 5.
  • the electrodes are made in the form of a number of vertical strips though they can be made of a single solid plate with projections rigidly fastened thereto.
  • the projections located on the surface of the electrode are made integrally with the latter though they can also be secured to the electrode with .or without a clearance.
  • the shape of the holes may vary within wide limits; for example, they can be round, rhomboid, etc.
  • the electrostatic precipitators have a number of receiving electrodes arranged so that they form passages for the flow of gas to be cleaned.
  • the electrostatic precipitator operates as follows.
  • the dust-laden gas flow enters the precipitator and moves intothe passage between the receiving electrodes.
  • the direction of the gas flow is shown by arrow Moving through the passage, the gas flows through the latticedprojections 2 behind which a zone is created of uniform and orderly flow at low velocities which reduces the amount of already-settled dust carried away into the main flow and assists in a more intensive accumulation of dust on the electrode.
  • the corona electrodes 5 installed between the receiving electrodes produce a corona discharge which charges the particles of dust.
  • the electrodes are shaken by an impact.
  • the layer of dust accumulated on the strips 1 starts moving down along the surface of the receiving electrode and falls into the hopper located under the electrodes.
  • the angle between the projection 2 and the gas flow is though it can be other than 90.
  • Electrostatic precipitators with receiving electrodes realized in accordance with the invention can be used in energy producing, chemical, metallurgical and cement industries as well as in the other branches of technology involving the filtration of gas flow.
  • a receiving electrode for a plate-type electrostatic precipitator comprising: an electrode member having a receiving surface washed by a flow of dust-laden gas, projections arranged on said receiving surface to form barriers in the path of flow of the dust-laden gas and flat plates extend perpendicularly from said receiving surface.

Abstract

A receiving electrode of a plate-type electrostatic precipitator comprising electrode projections forming barriers in the path of the dust-laden gas flow, the projections being provided with through holes.

Description

United States Patent [1 1 Gurvits et al.
RECEIVING ELECTRODE 0F PLATE-TYPE ELECTROSTATIC PRECIPITATOR Inventors: Alexandr Alexandrovich Gurvits,
Sobinovsky Pereulok, 9, kv. 9; Valentina Mikhailovna Aleshina, Proletarsky Prospekt, 64, Korpus 3, kv. 70, both of Moscow, U.S.S.R.
Filed: Feb. 22, 1972 Appl. No.: 228,198
US. Cl. 55/130, 55/154 Int. Cl. B03c 3/36, 1303c 3/45 Field of Search 55/130, 131,154,156,
References Cited UNITED STATES PATENTS ll/1951 Mack 55/156 x 7/1952 Raper 55/156 X 51 Apr. 30, 1974 Primary Examiner-Dennis E; Talbert, Jr. Attorney, Agent, or Firm-Eric H. Waters [57] ABSTRACT A receiving electrode of a plate-type electrostatic precipitator comprising electrode projections forming barriers in the path of the dust-laden gas flow, the pro-' .-'-j'ections being provided with through holes.
5 Claims, 1 Drawing Figure ago RECEIVING ELECTRODE F PLATE-TYPE ELECTROSTATIC PRECIPITATOR The projections of the above-mentioned electrodes are formed by bending the edges of the plates in such a manner that they are positioned across the gas flow (see, for example, Pat. No. 859,870, Cl.39 (1)j, England).
Also known in the art are receiving electrodes of plate-type electrostatic precipitators in the form of a flat metal plate. The entire surface of the plate is provided with projections formed by angles fastened rigidly to one side to the plate while the other'side forms a barrier in the path of the gas flow washing it (see, for example, US. Pat. No. 3,125,426, Cl.55l30, USA).
Also known in the art are electrodes of plate-type electrostatic precipitators having projections in the shape of right-angled triangles. The base of these rightangled triangles is rigidly fastened to the plate and the projections are also located across the gas flow washing the plate (see, for example, US. Pat. No. 2,826,262, Cl.55-l30, USA).
The main disadvantage of the known receiving electrodes is that ina high velocity gas flow, the gas being cleaned creates powerful turbulence which disturbs the stagnant zone and causes the particles of alreadysettled dust to be carried back into the main gas flow which impairs the efficiency of the gas cleaning in the electrostatic precipitators.
To prevent carrying away of the already-settled dust, the velocity of the gas flow in the known precipitators has been reduced which has also lowered the precipitator efficiency.
To increase the efficiency of the electrostatic precipitators, it becomes necessary to increase considerably the overall dimensions of said precipitators which ren ders them bulky and costly in operation.
An object of the invention resides in the provision of a precipitator eliminating the aforesaid disadvantages.
Another object of the invention is to increase the efficiency of gas-cleaning of electrostatic precipitators.
The above (and other objects) of the invention is accomplished by providing a receiving electrode for the plate-type electrostatic precipitator in the form of a surface washed by a gas flow and provided with projections forming barriers in the path of they gas flow wherein, according to the invention, said projections have through holes for the passage of gas.
It is preferable that the projections of the receiving electrode have the shape of a lattice.
An advantage of the present invention is that, due to the construction of the electrode with projections having through holes, the already-settled dust is prevented from being carried back into the main gas flow.
The lattice shape of the projections ensures a high efficiency for the precipitator and improves the standard of gas cleaning.
The sole FIGURE of the drawing is a perspective view diagrammatically illustrating a precipitator with electrodes according to the invention.
Referring to the drawing, therein is seen a receiving electrode consisting of a number of vertical strips 1 provided with projections 2 which have through holes 3. To reduce distortions of the electric field, the ends of the projections 2 have tubular edges 4. Located between the receiving electrodes are corona electrodes 5.
In this actual embodiment of the invention, the electrodes are made in the form of a number of vertical strips though they can be made of a single solid plate with projections rigidly fastened thereto.
The projections located on the surface of the electrode are made integrally with the latter though they can also be secured to the electrode with .or without a clearance.
The shape of the holes may vary within wide limits; for example, they can be round, rhomboid, etc.
The electrostatic precipitators have a number of receiving electrodes arranged so that they form passages for the flow of gas to be cleaned.
Installedunder the electrodes are hoppers or other devices (not shownin the drawing)for accumulating the dust shaken down from the surface of the elec trodes.
The electrostatic precipitator operates as follows.
The dust-laden gas flow enters the precipitator and moves intothe passage between the receiving electrodes. The direction of the gas flow is shown by arrow Moving through the passage, the gas flows through the latticedprojections 2 behind which a zone is created of uniform and orderly flow at low velocities which reduces the amount of already-settled dust carried away into the main flow and assists in a more intensive accumulation of dust on the electrode.
The corona electrodes 5 installed between the receiving electrodes produce a corona discharge which charges the particles of dust.
Acted upon by the electric field created by the potential of the corona electrodes 5, the charged particles move towards the strips 1 and settle theres After the strips 1 have been covered with a layer of dust, the electrodes are shaken by an impact.
The layer of dust accumulated on the strips 1 starts moving down along the surface of the receiving electrode and falls into the hopper located under the electrodes.
In the illustrated embodiment, the angle between the projection 2 and the gas flow is though it can be other than 90.
Electrostatic precipitators with receiving electrodes realized in accordance with the invention can be used in energy producing, chemical, metallurgical and cement industries as well as in the other branches of technology involving the filtration of gas flow.
What is claimed is:
1. A receiving electrode for a plate-type electrostatic precipitator comprising: an electrode member having a receiving surface washed by a flow of dust-laden gas, projections arranged on said receiving surface to form barriers in the path of flow of the dust-laden gas and flat plates extend perpendicularly from said receiving surface.
4. An electrode as claimed in claim 3 wherein said flat plates have free inner ends extending into said passage, and have tubular edges at said inner ends.
5. An electrode as claimed in claim 3 wherein said flat plates are rectangular and substantially uniformly perforate with said holes.

Claims (5)

1. A receiving electrode for a plate-type electrostatic precipitator comprising: an electrode member having a receiving surface washed by a flow of dust-laden gas, projections arranged on said receiving surface to form barriers in the path of flow of the dust-laden gas and close only a part of the cross-sectional area of a respective passage, said projections having holes for the passage of gas therethrough, said holes connecting the gas flow region before the projections with the gas flow region after the projections.
2. An electrode as claimed in claim 1 wherein said projections are flat plates, said holes extending completely through said flat plates.
3. An electrode as clAimed in claim 2 wherein said flat plates extend perpendicularly from said receiving surface.
4. An electrode as claimed in claim 3 wherein said flat plates have free inner ends extending into said passage, and have tubular edges at said inner ends.
5. An electrode as claimed in claim 3 wherein said flat plates are rectangular and substantially uniformly perforate with said holes.
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3998608A (en) * 1974-08-15 1976-12-21 Foster Wheeler Energy Corporation Production of hot clean industrially usable gas
EP0435850A1 (en) * 1989-12-29 1991-07-03 Alexander Gurvitz Collector electrode structure and electrostatic precipitator including same
JP2012125733A (en) * 2010-12-17 2012-07-05 Panasonic Corp Electrostatic precipitator
US20140053727A1 (en) * 2012-08-27 2014-02-27 Stanley J. Miller Staged electrostatic precipitator
US8894745B2 (en) 2011-08-10 2014-11-25 John P. Dunn Vane electrostatic precipitator
US9039815B2 (en) 2011-08-10 2015-05-26 John P. Dunn Vane electrostatic precipitator
US9073062B2 (en) 2011-08-10 2015-07-07 John P. Dunn Vane electrostatic precipitator
US9238230B2 (en) 2011-08-10 2016-01-19 John P. Dunn Vane electrostatic precipitator
EP2716367A3 (en) * 2012-10-08 2016-12-21 Hargassner Ges mbH Electrostatic precipitator for the exhaust gases from a boiler

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR602071A (en) * 1924-08-16 1926-03-12 Siemens Schuckertwerke Gmbh corrugated iron precipitation electrode for electrical gas cleaning
DE522479C (en) * 1931-04-09 Elga Elek Sche Gasreinigungs G Precipitation electrode designed as a flat and smooth sheet metal provided with longitudinal slots for electrical gas cleaners
US2575181A (en) * 1948-07-14 1951-11-13 Wheeling Steel Corp Precipitator collecting electrode
US2602519A (en) * 1948-07-14 1952-07-08 Wheeling Steel Corp Precipitator collecting electrode
GB687837A (en) * 1951-11-26 1953-02-18 Dieter Otto Heinrich Improvements relating to collecting electrodes for electro-precipitators
GB747301A (en) * 1954-04-07 1956-04-04 Carves Simon Ltd Improvements relating to collecting electrodes for electrostatic precipitators
US2996144A (en) * 1959-09-09 1961-08-15 Cottrell Res Inc Collecting electrode
US3008541A (en) * 1957-05-23 1961-11-14 Metallgesellschaft Ag Precipitating electrodes for electrofilters
US3125426A (en) * 1964-03-17 Collecting electrodes and electrode system
GB966558A (en) * 1960-03-25 1964-08-12 Svenska Flaktfabbiken Ab Electrostatic precipitator
US3158454A (en) * 1960-05-12 1964-11-24 Svenska Flaektfabriken Ab Arrangement in emission electrodes for electrostatic precipitators

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE522479C (en) * 1931-04-09 Elga Elek Sche Gasreinigungs G Precipitation electrode designed as a flat and smooth sheet metal provided with longitudinal slots for electrical gas cleaners
US3125426A (en) * 1964-03-17 Collecting electrodes and electrode system
FR602071A (en) * 1924-08-16 1926-03-12 Siemens Schuckertwerke Gmbh corrugated iron precipitation electrode for electrical gas cleaning
US2575181A (en) * 1948-07-14 1951-11-13 Wheeling Steel Corp Precipitator collecting electrode
US2602519A (en) * 1948-07-14 1952-07-08 Wheeling Steel Corp Precipitator collecting electrode
GB687837A (en) * 1951-11-26 1953-02-18 Dieter Otto Heinrich Improvements relating to collecting electrodes for electro-precipitators
GB747301A (en) * 1954-04-07 1956-04-04 Carves Simon Ltd Improvements relating to collecting electrodes for electrostatic precipitators
US3008541A (en) * 1957-05-23 1961-11-14 Metallgesellschaft Ag Precipitating electrodes for electrofilters
US2996144A (en) * 1959-09-09 1961-08-15 Cottrell Res Inc Collecting electrode
GB966558A (en) * 1960-03-25 1964-08-12 Svenska Flaktfabbiken Ab Electrostatic precipitator
US3158454A (en) * 1960-05-12 1964-11-24 Svenska Flaektfabriken Ab Arrangement in emission electrodes for electrostatic precipitators

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3998608A (en) * 1974-08-15 1976-12-21 Foster Wheeler Energy Corporation Production of hot clean industrially usable gas
EP0435850A1 (en) * 1989-12-29 1991-07-03 Alexander Gurvitz Collector electrode structure and electrostatic precipitator including same
US5076820A (en) * 1989-12-29 1991-12-31 Alexander Gurvitz Collector electrode structure and electrostatic precipitator including same
JP2012125733A (en) * 2010-12-17 2012-07-05 Panasonic Corp Electrostatic precipitator
US8894745B2 (en) 2011-08-10 2014-11-25 John P. Dunn Vane electrostatic precipitator
US9039815B2 (en) 2011-08-10 2015-05-26 John P. Dunn Vane electrostatic precipitator
US9073062B2 (en) 2011-08-10 2015-07-07 John P. Dunn Vane electrostatic precipitator
US9238230B2 (en) 2011-08-10 2016-01-19 John P. Dunn Vane electrostatic precipitator
US20140053727A1 (en) * 2012-08-27 2014-02-27 Stanley J. Miller Staged electrostatic precipitator
US9272291B2 (en) * 2012-08-27 2016-03-01 Energy & Environmental Research Center Foundation Staged electrostatic precipitator
EP2716367A3 (en) * 2012-10-08 2016-12-21 Hargassner Ges mbH Electrostatic precipitator for the exhaust gases from a boiler

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