US3158453A - Emission electrode system - Google Patents
Emission electrode system Download PDFInfo
- Publication number
- US3158453A US3158453A US43169A US4316960A US3158453A US 3158453 A US3158453 A US 3158453A US 43169 A US43169 A US 43169A US 4316960 A US4316960 A US 4316960A US 3158453 A US3158453 A US 3158453A
- Authority
- US
- United States
- Prior art keywords
- electrodes
- emitting
- rows
- gas
- units
- 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
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
- B03C3/40—Electrode constructions
- B03C3/41—Ionising-electrodes
Definitions
- the present invention relates to an emission electrode system for electric precipitators and comprises a plurality of electrodes suspended in frames. With the everincreasing overall height aimed at for electric precipitators, it has proved diflicult to provide for cleansing the electrodes by simple conventional means. In this connection especially the cleansing of the emission electrodes has involved a troublesome problem.
- the emission electrodes for several reasons, cannot be constructed with the same mechanical rigidity, or stiffness, as it is possible to attain by simple expedients for the precipitation electrodes. Therefore, it has been necessary in the past to subdivide the emission electrode system into a plurality of sections, one above the other and each provided with its individual rapping device. Such construction, however, turns out to be very expensive. In addition, such a construction necessitates an unfavourable disposition of the elements forming part of the rapping device relative to the path of the gas flow through the electric precipitator.
- the invention has for its object to enable cleansing of the emission electrodes by the use of one single beating device disposed adjacent the bottom ends of the electrodes.
- the beating device can be of a design identical to that used for the precipitation electrodes which, of course, means saving of labour and expenses.
- the novel and characterizing feature of the emission electrode system according to the invention resides in that the electrodes are combined into units each containing two or more electrodes by means of members acting as stifleners.
- the stiiener may extend substantially throughout the length of the electrodes, or the emission electrodes may alternatively be combined by means of a plurality of stiieners distributed throughout the length of the electrodes.
- the electrodes of the emission electrode system suitably consist of strips known per se having smooth or toothed edges and, in this case, the stiifener may be constituted by a sheet-metal strip of a configuration substantially the same as that of the precipitation electrodes used in the precipitator.
- the emission electrode system could also be made with the stiiener as an integral part of the emission electrodes.
- FIG. l is a vertical sectional view of a portion of a precipitator made in accordance with the present invention.
- FIG. la is a vertical sectional view like FIG. 1 but showing another portion of the precipitator and a modiied form of reinforcing means;
- FIG. 2 is an enlarged horizontal section through a number of electrodes arranged as in FIG. l or FIG. la, showing an emission electrode disposed between two precipitation electrodes.
- FIG. 3 is a fragmentary side elevational view of the emission electrode of FIG. 2;
- FIG. 4 is a view similar to FIG. 3 showing an emission electrode having toothed side edges.
- FIG. 5 is a horizontal section on a reduced scale of the apparatus shown in FIG. l'.
- two emission electrodes 1 of strip plate form are connected by a plate-like stiifener 2, as of sheet metal having its principal plane disposed transversely or at right angles to the planes of the electrode plates 1, to form a transversely stiff rigid unit 3.
- FIG. la shows a form like that of FIG. 1 but in which the stitfeners 2a are made in short sections instead of continuous lengths to connect the plate electrodes 1a to form a rigid unit 3a. Said units at their top ends are pivotally mounted in a framework 4 which is insulated from the casing 5 of the electric precipitator.
- Numeral 7 designates a plurality of precipitation electrodes disposed on both sides of the emission electrodes. The electrodes are pivotally suspended from a framework 8 which is rigidly connected with the casing 5 of the electric precipitator.
- Numeral 9 designates a rapping or beating device of a conventional design for cleansing the emission electrodes.
- the rapping device is arranged to actuate a beating rod 10 disposed beneath the electrodes, this rod being made of double flat iron bars and provided with abutments 11 inserted between these bars.
- the emission electrodes are suspended by means of sheet-metal brackets 13 engaging slots 14 formed in the framework 4.
- the beating device for the precipitation electrodes is of similar design, but both could be of any other suitable design of course.
- the units 3 and 3a are generally similar.
- the units 3 at the left hand side of FIG. l include continuous stiffening members 2 coextensive with the electrodes 1.
- the units 3a at the right hand side of FIG. 1 include stitfening members 2a which are composed of a plurality of short sections disposed in spaced relation longitudinally of the electrodes 1a.
- FIG. 2 of the drawing the parts shown are provided with reference numerals identical to those of FIG. l.
- the electrodes shown therein consist of sheet-metal strips having smooth edges 16 (see FIG. 3), as previously known per se.
- the electrodes may be modified as shown at 1b in FIG. 4 by providing teeth on the edges such as shown at 16h.
- the stilfening member 2 is of a configuration substantially the same as that of the precipitation electrodes 7 used in the precipitator.
- An electrostatic precipitator comprising a casing adapted to have a gas to be cleaned owing therethrough, a plurality of emitting and collecting electrodes in said casing, means pivotally suspending said electrodes in said casing in rows aligned longitudinally with the direction of flow of gas to be cleaned, the rows in a direction transversely of the direction of gas flow being arranged in alternating rows of emitting and collecting electrodes, each row of said emitting electrodes comprising a plurality of longitudinally spaced substantially iiat strips disposed transverse to the direction of iow of the gas to be cleaned, interconnecting stiiening means secured between 4and uniting said strips in pairs, said stiflening means each comprising a sheet metal member having an intermediate web and attachment element on opposite sides of said intermediate web, said attachment elements each being secured to a respective one of said strips, rapping means operatively connected to the bottom ends of said emitting and collecting electrodes and arranged to rap the electrodes in the direction of the length of the rows of electrodes,
Landscapes
- Electrostatic Separation (AREA)
Description
United States Patent Oiice 3,158,453 Patented Nov. 24, 19,64
3,158,453 EMISSIN ELECTRODE SYSTEM Sten Maartman, Klinten, and Stig Gustafsson, Jonkoping,
Sweden, assignors to Aktieholaget Svenska Flaktfabriken, Stockholm, Sweden Filed July 15, 1960, Ser. No. 43,169 Claims priority, application Sweden, Oct. 21, 1959,
9,805/59 3 Claims. (Cl. 55-112) The present invention relates to an emission electrode system for electric precipitators and comprises a plurality of electrodes suspended in frames. With the everincreasing overall height aimed at for electric precipitators, it has proved diflicult to provide for cleansing the electrodes by simple conventional means. In this connection especially the cleansing of the emission electrodes has involved a troublesome problem. As a matter of fact, the emission electrodes, for several reasons, cannot be constructed with the same mechanical rigidity, or stiffness, as it is possible to attain by simple expedients for the precipitation electrodes. Therefore, it has been necessary in the past to subdivide the emission electrode system into a plurality of sections, one above the other and each provided with its individual rapping device. Such construction, however, turns out to be very expensive. In addition, such a construction necessitates an unfavourable disposition of the elements forming part of the rapping device relative to the path of the gas flow through the electric precipitator.
The invention has for its object to enable cleansing of the emission electrodes by the use of one single beating device disposed adjacent the bottom ends of the electrodes. In this case the beating device can be of a design identical to that used for the precipitation electrodes which, of course, means saving of labour and expenses. The novel and characterizing feature of the emission electrode system according to the invention resides in that the electrodes are combined into units each containing two or more electrodes by means of members acting as stifleners. The stiiener may extend substantially throughout the length of the electrodes, or the emission electrodes may alternatively be combined by means of a plurality of stiieners distributed throughout the length of the electrodes.
The electrodes of the emission electrode system suitably consist of strips known per se having smooth or toothed edges and, in this case, the stiifener may be constituted by a sheet-metal strip of a configuration substantially the same as that of the precipitation electrodes used in the precipitator. The emission electrode system could also be made with the stiiener as an integral part of the emission electrodes.
The invention will now be described more closely with reference to the accompanying drawing showing by way of example one embodiment of the emission electrode system according to the invention and in which:
FIG. l is a vertical sectional view of a portion of a precipitator made in accordance with the present invention;
FIG. la is a vertical sectional view like FIG. 1 but showing another portion of the precipitator and a modiied form of reinforcing means;
FIG. 2 is an enlarged horizontal section through a number of electrodes arranged as in FIG. l or FIG. la, showing an emission electrode disposed between two precipitation electrodes.
FIG. 3 is a fragmentary side elevational view of the emission electrode of FIG. 2;
FIG. 4 is a view similar to FIG. 3 showing an emission electrode having toothed side edges.
FIG. 5 is a horizontal section on a reduced scale of the apparatus shown in FIG. l'.
In FIG. l two emission electrodes 1 of strip plate form are connected by a plate-like stiifener 2, as of sheet metal having its principal plane disposed transversely or at right angles to the planes of the electrode plates 1, to form a transversely stiff rigid unit 3.
FIG. la shows a form like that of FIG. 1 but in which the stitfeners 2a are made in short sections instead of continuous lengths to connect the plate electrodes 1a to form a rigid unit 3a. Said units at their top ends are pivotally mounted in a framework 4 which is insulated from the casing 5 of the electric precipitator. Numeral 7 designates a plurality of precipitation electrodes disposed on both sides of the emission electrodes. The electrodes are pivotally suspended from a framework 8 which is rigidly connected with the casing 5 of the electric precipitator. Numeral 9 designates a rapping or beating device of a conventional design for cleansing the emission electrodes. The rapping device is arranged to actuate a beating rod 10 disposed beneath the electrodes, this rod being made of double flat iron bars and provided with abutments 11 inserted between these bars. In the embodiment shown, the emission electrodes are suspended by means of sheet-metal brackets 13 engaging slots 14 formed in the framework 4. The beating device for the precipitation electrodes is of similar design, but both could be of any other suitable design of course.
The units 3 and 3a are generally similar. The units 3 at the left hand side of FIG. l include continuous stiffening members 2 coextensive with the electrodes 1. The units 3a at the right hand side of FIG. 1 include stitfening members 2a which are composed of a plurality of short sections disposed in spaced relation longitudinally of the electrodes 1a.
In FIG. 2 of the drawing, the parts shown are provided with reference numerals identical to those of FIG. l. The electrodes shown therein consist of sheet-metal strips having smooth edges 16 (see FIG. 3), as previously known per se. The electrodes may be modified as shown at 1b in FIG. 4 by providing teeth on the edges such as shown at 16h. The stilfening member 2 is of a configuration substantially the same as that of the precipitation electrodes 7 used in the precipitator.
What is claimed is:
l. An electrostatic precipitator comprising a casing adapted to have a gas to be cleaned owing therethrough, a plurality of emitting and collecting electrodes in said casing, means pivotally suspending said electrodes in said casing in rows aligned longitudinally with the direction of flow of gas to be cleaned, the rows in a direction transversely of the direction of gas flow being arranged in alternating rows of emitting and collecting electrodes, each row of said emitting electrodes comprising a plurality of longitudinally spaced substantially iiat strips disposed transverse to the direction of iow of the gas to be cleaned, interconnecting stiiening means secured between 4and uniting said strips in pairs, said stiflening means each comprising a sheet metal member having an intermediate web and attachment element on opposite sides of said intermediate web, said attachment elements each being secured to a respective one of said strips, rapping means operatively connected to the bottom ends of said emitting and collecting electrodes and arranged to rap the electrodes in the direction of the length of the rows of electrodes, said interconnecting stifening means forming with said strips units of suiiicient rigidity to permit effective cleaning of the units by rapping the lower ends of the full length units.
2. An electrostatic precipitator according to claim 1 wherein said stitfening member is continuous and coextensive with said emitting electrodes.
Y 3 3. An electrostatic precipitator according to claim 1 wherein said stiiening member comprises a plurality of short sections disposed in spaced relation longitudinally of the emitting electrodes.
References Cited in the le of this patent UNITED STATES PATENTS 4 2 Gannone Apr. 3, 1951 Richardson Apr. 29, 1952 Wintermute Feb. 9, 1954 Wintermute Nov. 16, 1954 Sohlman et a1. Nov. 5, 1957 FOREIGN PATENTS Great Bn'tain 1913 Great Britain Apr. 4, 1956 France Feb. 25, 1946 UNITED STATES PATENT OFFICE CERTIFICATE 0F CORRECTION Patent No. 3, 158,453 November 24 1964 Sten Maartman et altl It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.
(SEAL) Attest: Y I
ERNEST W. SWIDERI EDWARD J BRENNER i Attestin Officer Commissioner of Patents n
Claims (1)
1. AN ELECTROSTATIC PRECIPITATOR COMPRISING A CASING ADAPTED TO HAVE A GAS TO BE CLEANED FLOWING THERETHROUGH, A PLURLAITY OF EMITTING AND COLLECTING ELECTRODES IN SAID CASING, MEANS PIVOTALLY SUSPENDING SAID ELECTRODES IN SAID CASING IN ROWS ALIGNED LONGITUDINALLY WITH THE DIRECTION OF FLOW OF GAS TO BE CLEANED, THE ROWS IN A DIRECTION TRANSVERSELY OF THE DIRECTION OF GAS FLOW BEING ARRANGED IN ALTERNATING ROWS OF EMITTING AND COLLECTING ELECTRODES EACH ROW OF SAID EMITTING ELECTRODES COMPRISING A PLURALITY OF LONGITUDINALLY SPACED SUBSTANTIALLY FLAT STRIPS DISPOSED TRANSVERSE TO THE DIRECTION OF FLOW OF THE GAS TO BE CLEANED, INTERCONNECTING STIFFENING MEANS SECURED BETWEEN AND UNITING SAID STRIPS IN PAIRS, SAID STIFFENING MEANS EACH COMPRISING A SHEET METAL MEMBER HAVING AN INTERMEDIATE WEB AND ATTACHMENT ELEMENT ON OPPOSITE SIDES OF SAID INTERMEDIATE WEB, SAID ATTACHMENT ELEMENTS EACH BEING SECURED TO A RESPECTIVE ONE OF SAID STRIPS, RAPPING MEANS OPERATIVELY CONNECTED TO BOTTOM ENDS OF SAID EMITTING AND COLLECTING ELECTRODES AND ARRANGED TO RAP THE ELECTRODES IN THE DIRECTION OF THE LENGTH OF THE ROWS OF ELECTRODES, SAID INTERCONNECTED STIFFENING MEANS FORMING WITH SAID UNITS OF SUFFICIENT RIGIDITY TO PERMIT EFFECTIVE CLEANING OF THE UNITS BY RAPPING THE LOWER ENDS OF THE FULL LENGTH UNITS.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE980559 | 1959-10-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3158453A true US3158453A (en) | 1964-11-24 |
Family
ID=20277572
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US43169A Expired - Lifetime US3158453A (en) | 1959-10-21 | 1960-07-15 | Emission electrode system |
Country Status (2)
Country | Link |
---|---|
US (1) | US3158453A (en) |
BE (1) | BE588920A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3200565A (en) * | 1961-07-12 | 1965-08-17 | Svenska Flaektfabriken Ab | Electrostatic precipitators |
US3257779A (en) * | 1961-09-15 | 1966-06-28 | Strubler Gordon | Electrostatic agglomerator having an improved discharge electrode structure |
US3540191A (en) * | 1967-01-31 | 1970-11-17 | Marc Victor Edgard Herman | Electrostatic separator |
US4303418A (en) * | 1977-04-18 | 1981-12-01 | Joy Manufacturing Company | Discharge electrode in precipitator |
US4375364A (en) * | 1980-08-21 | 1983-03-01 | Research-Cottrell, Inc. | Rigid discharge electrode for electrical precipitators |
US4514195A (en) * | 1977-04-18 | 1985-04-30 | Joy Manufacturing Company | Discharge electrode |
US4647296A (en) * | 1985-11-08 | 1987-03-03 | Mississippi Power Company | Spacers for straightening warped precipitator curtains |
US4765802A (en) * | 1987-07-15 | 1988-08-23 | Wheelabrator Air Pollution Control Inc. | Electrostatic precipitator plate spacer and method of installing same |
US5931989A (en) * | 1995-06-20 | 1999-08-03 | Abb Flakt Ab | Device in an electrostatic precipitator for the suspending, controlling and rapping of collecting electrodes |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB191318357A (en) * | 1912-08-13 | 1915-06-10 | Erwin Moeller | Method of and Apparatus for Separating Suspended Particles from Gaseous Bodies by Means of High Tension Electricity. |
US2195431A (en) * | 1935-10-09 | 1940-04-02 | Koppers Co Inc | Gas treating apparatus |
US2283964A (en) * | 1940-02-29 | 1942-05-26 | Westinghouse Electric & Mfg Co | Electrical dust precipitator |
FR911017A (en) * | 1943-12-29 | 1946-06-26 | Svenska Flaektfabriken Ab | precipitation electrode for electric filters |
US2547573A (en) * | 1949-04-18 | 1951-04-03 | Research Corp | Rapper for electrical precipitation apparatus |
US2595204A (en) * | 1949-11-25 | 1952-04-29 | Research Corp | Electrical precipitation |
US2668600A (en) * | 1953-04-06 | 1954-02-09 | Research Corp | Electrode structure |
US2694464A (en) * | 1951-02-09 | 1954-11-16 | Research Corp | Electrical precipitator |
GB747301A (en) * | 1954-04-07 | 1956-04-04 | Carves Simon Ltd | Improvements relating to collecting electrodes for electrostatic precipitators |
US2812035A (en) * | 1955-09-09 | 1957-11-05 | Buell Engineering Company Inc | Electrostatic precipitator and a collecting electrode therefor |
-
1960
- 1960-03-22 BE BE588920A patent/BE588920A/en unknown
- 1960-07-15 US US43169A patent/US3158453A/en not_active Expired - Lifetime
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB191318357A (en) * | 1912-08-13 | 1915-06-10 | Erwin Moeller | Method of and Apparatus for Separating Suspended Particles from Gaseous Bodies by Means of High Tension Electricity. |
US2195431A (en) * | 1935-10-09 | 1940-04-02 | Koppers Co Inc | Gas treating apparatus |
US2283964A (en) * | 1940-02-29 | 1942-05-26 | Westinghouse Electric & Mfg Co | Electrical dust precipitator |
FR911017A (en) * | 1943-12-29 | 1946-06-26 | Svenska Flaektfabriken Ab | precipitation electrode for electric filters |
US2547573A (en) * | 1949-04-18 | 1951-04-03 | Research Corp | Rapper for electrical precipitation apparatus |
US2595204A (en) * | 1949-11-25 | 1952-04-29 | Research Corp | Electrical precipitation |
US2694464A (en) * | 1951-02-09 | 1954-11-16 | Research Corp | Electrical precipitator |
US2668600A (en) * | 1953-04-06 | 1954-02-09 | Research Corp | Electrode structure |
GB747301A (en) * | 1954-04-07 | 1956-04-04 | Carves Simon Ltd | Improvements relating to collecting electrodes for electrostatic precipitators |
US2812035A (en) * | 1955-09-09 | 1957-11-05 | Buell Engineering Company Inc | Electrostatic precipitator and a collecting electrode therefor |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3200565A (en) * | 1961-07-12 | 1965-08-17 | Svenska Flaektfabriken Ab | Electrostatic precipitators |
US3257779A (en) * | 1961-09-15 | 1966-06-28 | Strubler Gordon | Electrostatic agglomerator having an improved discharge electrode structure |
US3540191A (en) * | 1967-01-31 | 1970-11-17 | Marc Victor Edgard Herman | Electrostatic separator |
US4303418A (en) * | 1977-04-18 | 1981-12-01 | Joy Manufacturing Company | Discharge electrode in precipitator |
US4514195A (en) * | 1977-04-18 | 1985-04-30 | Joy Manufacturing Company | Discharge electrode |
US4375364A (en) * | 1980-08-21 | 1983-03-01 | Research-Cottrell, Inc. | Rigid discharge electrode for electrical precipitators |
US4647296A (en) * | 1985-11-08 | 1987-03-03 | Mississippi Power Company | Spacers for straightening warped precipitator curtains |
US4765802A (en) * | 1987-07-15 | 1988-08-23 | Wheelabrator Air Pollution Control Inc. | Electrostatic precipitator plate spacer and method of installing same |
US5931989A (en) * | 1995-06-20 | 1999-08-03 | Abb Flakt Ab | Device in an electrostatic precipitator for the suspending, controlling and rapping of collecting electrodes |
Also Published As
Publication number | Publication date |
---|---|
BE588920A (en) | 1960-07-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US1882949A (en) | Electrical precipitation apparatus | |
US3158453A (en) | Emission electrode system | |
US3540191A (en) | Electrostatic separator | |
US3831351A (en) | Electrostatic precipitator | |
CZ287856B6 (en) | Electrostatic precipitator | |
EP2471602B1 (en) | Electrical screening device for structures near high voltage parts of electrostatic precipitators | |
US3282029A (en) | Emitting electrode construction for electrostatic separators | |
US4521229A (en) | Tubular discharge electrode for electrostatic precipitator | |
US2812035A (en) | Electrostatic precipitator and a collecting electrode therefor | |
US3435594A (en) | Electrode discharge plate for dust collector | |
US3354617A (en) | Corona shield for ionizer wires | |
US2380992A (en) | Electrical dust-precipitator system and interchangeable parts therefor | |
US4303418A (en) | Discharge electrode in precipitator | |
US2999561A (en) | Electrical precipitator apparatus | |
US2271597A (en) | Apparatus for electrical precipitation | |
US3125426A (en) | Collecting electrodes and electrode system | |
US2694464A (en) | Electrical precipitator | |
DE701416C (en) | Electrostatic precipitator for horizontal or inclined gas passage through a bundle of tubular electrodes with a honeycomb cross section | |
GB835012A (en) | Improvements relating to electrostatic precipitators | |
US4514195A (en) | Discharge electrode | |
US3482375A (en) | Electrofilter with corrugated sheet metal-type collecting electrodes | |
US2932359A (en) | Electrostatic precipitators | |
US2869678A (en) | Electrostatic precipitators | |
US3200565A (en) | Electrostatic precipitators | |
US3570219A (en) | Discharge electrode assembly |