US2874802A - Method for cleaning the electrodes in electro-filters - Google Patents
Method for cleaning the electrodes in electro-filters Download PDFInfo
- Publication number
- US2874802A US2874802A US520344A US52034455A US2874802A US 2874802 A US2874802 A US 2874802A US 520344 A US520344 A US 520344A US 52034455 A US52034455 A US 52034455A US 2874802 A US2874802 A US 2874802A
- Authority
- US
- United States
- Prior art keywords
- electrodes
- cleaning
- liquid
- electro
- filters
- 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
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
-
- 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
- B03C3/78—Cleaning the electrodes by washing
Definitions
- the present invention relates to a method for cleaning of the electrodes of electrical precipitators by flushing the electrodes with liquid.
- electrical precipitators for gases which on the electrodes cause deposits which cannot be mechanically removed by vibrating or the like it is common to flush the electrodes.
- In order to avoid interruption of the operation of the precipitators during the flushing it has previously been necessary to use limited quantities of liquid whereby mainly the collecting electrodes have been subjected to said liquid. Because of this the flushing of said collecting electrodes has been unsatisfactory and, further, it has not been possible to remove the dust being accumulated on the emission electrodes.
- Fig. 1 is a longitudinal section through a precipitator equipped to perform the method of the present invention
- Fig. 2 is a sectional view taken on the line 2-2 of Fig. 1;
- Fig. 3 is a sectional view taken on the line 3-3 of Fig. l.
- the method is characterized in that the flushing is performed by means of two separate spray systems 11 and 14 in such a manner that the liquid is supplied in part continuously in the form of one or more curtains 16 of liquid atomized by spray nozzles 15 in the system 14, said curtains being perpendicular to the flow direction of the gas, and in part intermittently with greater intensity in form of similar vertical liquid curtains 17 which are parallel to the gas flow and are formed by nozzles or apertures in the system 11.
- the liquid particles in the continuous flushing system 14 are evenly distributed on the collecting electrodes 12 by the influence of the electrical field in spite of the fact that the quantity of liquid is limited to such an extent which is suitable for the uninterrupted running of the precipitator.
- the illustrated apparatus comprises an electrical precipitator 7 having horizontal gas flow from the inlet 1 to the outlet 13 and being provided with one or more sections of vertical sheet-like collecting electrodes 12 arranged parallel to the gas flow and with intermediate spaced rows of emission electrodes 9.
- the emission electrodes 9 comprise wires stretched in conventional manner within supporting frames 8 which are supported in the casing 7 by insulators 6.
- the sheet-like collecting electrodes 12 are arranged intermediate the frames 8.
- the continuous flushing system 14 may be connected to a supply pipe 2 by a branch conduit 3.
- the intermittent flushing system 11 may be connected to the supply pipe 2 by a branch conduit 5 having an automatic valve 4 therein which is actuated by a suitable timing device or the like which effects intermittent operation of the system 11.
- the method for cleaning electrodes in electrical precipitators having horizontal gas flow therein between vertical sheet-like collecting electrodes arranged parallel to the flow and intermediate rows of emission electrodes comprising the steps of continuously causing the gas to flow horizontally through said precipitator and forming a vertical curtain of liquid perpendicular to the gas flow within said precipitator in advance of said collecting electrodes whereby liquid particles from said curtain are entrained in said flow and distributed to the collecting electrodes to partially liquify the deposit thereon and flush the same, the flushed deposit continuously flowing downward on said vertical electrodes transversely to said horizontal gas flow, and intermittently forming other curtains of atomized liquid parallel to the sheet-like collecting electrodes and the gas flow intermediate said electrodes to thoroughly clean both the emission and collecting electrodes.
Description
Feb. 24, 1959 s. GUSTAFSSON ET AL 2,874,802
METHOD FOR CLEANING 'IHE ELECTRODES IN ELECTRO-FILTERS Filed July 6, 1955 FIE. I.
0. 3 Mu 11. all f n m fl/ "J 7 v/m m M f m n 5 6r 1 l 3 IIIIPIHHHHHIIII United States Patent filic Patented Feb. 24, 1959 METHOD FOR CLEANING THE ELECTRODES IN ELECTRO-FILTERS Stig Gustafsson, Jonkoping, and Per-olof hnfeldt, Lidingo, Sweden, assignors to Aktiebolaget Svenska Flaktfabriken, Stockholm, Sweden Application July 6, 1955, Serial No. 520,344
Claims priority, application Sweden July 7, 1954 2 Claims. (Cl. 183-114) The present invention relates to a method for cleaning of the electrodes of electrical precipitators by flushing the electrodes with liquid. In electrical precipitators for gases which on the electrodes cause deposits which cannot be mechanically removed by vibrating or the like it is common to flush the electrodes. In order to avoid interruption of the operation of the precipitators during the flushing it has previously been necessary to use limited quantities of liquid whereby mainly the collecting electrodes have been subjected to said liquid. Because of this the flushing of said collecting electrodes has been unsatisfactory and, further, it has not been possible to remove the dust being accumulated on the emission electrodes.
It is an object of the method according to the invention to eliminate these drawbacks.
All of the objects of the invention, and a suitable apparatus to which the invention may be applied are set forth more fully hereinafter with reference to the accompanying drawing, wherein:
Fig. 1 is a longitudinal section through a precipitator equipped to perform the method of the present invention;
Fig. 2 is a sectional view taken on the line 2-2 of Fig. 1; and,
Fig. 3 is a sectional view taken on the line 3-3 of Fig. l.
The method is characterized in that the flushing is performed by means of two separate spray systems 11 and 14 in such a manner that the liquid is supplied in part continuously in the form of one or more curtains 16 of liquid atomized by spray nozzles 15 in the system 14, said curtains being perpendicular to the flow direction of the gas, and in part intermittently with greater intensity in form of similar vertical liquid curtains 17 which are parallel to the gas flow and are formed by nozzles or apertures in the system 11.
According to the invention the liquid particles in the continuous flushing system 14 are evenly distributed on the collecting electrodes 12 by the influence of the electrical field in spite of the fact that the quantity of liquid is limited to such an extent which is suitable for the uninterrupted running of the precipitator. By the cooperation between said continuous flushing system 14 and 2' the intermittent but intensive system 11, both the collecting electrodes 12 and the emission electrodes 9 will be thoroughly cleaned.
The illustrated apparatus comprises an electrical precipitator 7 having horizontal gas flow from the inlet 1 to the outlet 13 and being provided with one or more sections of vertical sheet-like collecting electrodes 12 arranged parallel to the gas flow and with intermediate spaced rows of emission electrodes 9. The emission electrodes 9 comprise wires stretched in conventional manner within supporting frames 8 which are supported in the casing 7 by insulators 6. The sheet-like collecting electrodes 12 are arranged intermediate the frames 8.
The continuous flushing system 14 may be connected to a supply pipe 2 by a branch conduit 3. The intermittent flushing system 11 may be connected to the supply pipe 2 by a branch conduit 5 having an automatic valve 4 therein which is actuated by a suitable timing device or the like which effects intermittent operation of the system 11.
While a particular precipitator is shown in the drawing, the invention may be applied to any other suitable precipitator within the scope of the following claims.
What we claim:
1. The method for cleaning electrodes in electrical precipitators having horizontal gas flow therein between vertical sheet-like collecting electrodes arranged parallel to the flow and intermediate rows of emission electrodes, comprising the steps of continuously causing the gas to flow horizontally through said precipitator and forming a vertical curtain of liquid perpendicular to the gas flow within said precipitator in advance of said collecting electrodes whereby liquid particles from said curtain are entrained in said flow and distributed to the collecting electrodes to partially liquify the deposit thereon and flush the same, the flushed deposit continuously flowing downward on said vertical electrodes transversely to said horizontal gas flow, and intermittently forming other curtains of atomized liquid parallel to the sheet-like collecting electrodes and the gas flow intermediate said electrodes to thoroughly clean both the emission and collecting electrodes.
2. A method according to claim 1 wherein the quantity of liquid in the continuous curtain is limited to an extent which is suitable for the uninterrupted running of the precipitator, and wherein further the operation of the intermittent curtain is more intensive than said continuous curtain.
References Cited in the file of this patent UNITED STATES PATENTS 1,329,737 Wolcott Feb. 3, 1920 1,329,817 Wolcott Feb. 3, 1920 1,905,993 Buff Apr. 25, 1933 2,171,617 Wintermute Sept. 5, 1939 2,748,889 Rcnwanz June 5, 1956
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE2874802X | 1954-07-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2874802A true US2874802A (en) | 1959-02-24 |
Family
ID=20427623
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US520344A Expired - Lifetime US2874802A (en) | 1954-07-07 | 1955-07-06 | Method for cleaning the electrodes in electro-filters |
Country Status (4)
Country | Link |
---|---|
US (1) | US2874802A (en) |
DE (1) | DE1009163B (en) |
FR (1) | FR1126708A (en) |
GB (1) | GB769865A (en) |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3501898A (en) * | 1965-03-05 | 1970-03-24 | Svenska Flaektfabriken Ab | Emitting electrode assembly for electrostatic precipitators |
US3958961A (en) * | 1973-02-02 | 1976-05-25 | United States Filter Corporation | Wet electrostatic precipitators |
US3958960A (en) * | 1973-02-02 | 1976-05-25 | United States Filter Corporation | Wet electrostatic precipitators |
US3988130A (en) * | 1975-09-24 | 1976-10-26 | The Trane Company | Electrostatic precipitator with rapper and pneumatic flow blocking |
US4265641A (en) * | 1979-05-18 | 1981-05-05 | Monsanto Company | Method and apparatus for particle charging and particle collecting |
US4455155A (en) * | 1982-07-30 | 1984-06-19 | Allis-Chalmers Corp. | Electrostatic collecting assembly |
US5160351A (en) * | 1990-06-09 | 1992-11-03 | Metallgesellschaft Aktiengesellschaft | Process of and apparatus for cleaning a dedusting electrostatic precipitator |
US5624476A (en) * | 1991-08-21 | 1997-04-29 | Ecoprocess | Method and device for purifying gaseous effluents |
US6235088B1 (en) * | 1997-04-21 | 2001-05-22 | Kazuo Matsuura | Alcohol separator for an alcohol solution |
US6488740B1 (en) | 2000-03-01 | 2002-12-03 | Electric Power Research Institute, Inc. | Apparatus and method for decreasing contaminants present in a flue gas stream |
US6533841B1 (en) * | 1997-06-30 | 2003-03-18 | Toftejorg A/S | Method and rinsing equipment for the cleaning of especially filter plates in an electro-filter |
US20040261673A1 (en) * | 2003-04-11 | 2004-12-30 | Allen Gary W. | Reduced-emissions fossil-fuel-fired system |
US20060201328A1 (en) * | 2005-03-08 | 2006-09-14 | Fancy Food Service Equipment Co., Ltd. | Air filter device for air exhauster |
US20060226373A1 (en) * | 2005-03-02 | 2006-10-12 | Eisenmann Corporation | Wet electrostatic precipitator for treating oxidized biomass effluent |
US20060261265A1 (en) * | 2005-03-02 | 2006-11-23 | Eisenmann Corporation | Dual flow wet electrostatic precipitator |
US20070009411A1 (en) * | 2005-07-08 | 2007-01-11 | Eisenmann Corporation | Method and apparatus for particulate removal and undesirable vapor scrubbing from a moving gas stream |
US20070128090A1 (en) * | 2005-12-06 | 2007-06-07 | Eisenmann Corporation | Wet electrostatic liquid film oxidizing reactor apparatus and method for removal of NOx, SOx, mercury, acid droplets, heavy metals and ash particles from a moving gas |
US20080216658A1 (en) * | 2007-03-05 | 2008-09-11 | Hitachi Plant Technologies, Ltd. | Wet-type electrostatic precipitator |
US20090114092A1 (en) * | 2006-06-07 | 2009-05-07 | Sune Bengtsson | Wet electrostatic precipitator |
US20110252965A1 (en) * | 2008-11-20 | 2011-10-20 | Fachhochschule Gelsenkirchen | Wet-cleaning electrostatic filter for cleaning exhaust gas and a suitable method for the same |
US10926272B2 (en) * | 2017-06-30 | 2021-02-23 | Das Environmental Expert Gmbh | Electrostatic precipitator and method for electrostatic precipitation of materials out of an exhaust gas flow |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1329817A (en) * | 1917-07-05 | 1920-02-03 | Int Precipitation Co | Art of precipitating suspended material from gases |
US1329737A (en) * | 1919-03-19 | 1920-02-03 | Int Precipitation Co | Method of precipitating suspended material from furnace-gases |
US1905993A (en) * | 1930-08-29 | 1933-04-25 | Int Precipitation Co | Treatment of gases |
US2171617A (en) * | 1937-02-13 | 1939-09-05 | Research Corp | Gas treatment |
US2748889A (en) * | 1955-06-08 | 1956-06-05 | Research Corp | Electrostatic precipitator |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE597577C (en) * | 1930-02-21 | 1934-05-28 | Siemens Schuckertwerke Akt Ges | Process for humidifying gases to be cleaned electrically in the electronic wet filter |
-
1955
- 1955-06-16 DE DEA22881A patent/DE1009163B/en active Pending
- 1955-06-16 GB GB17345/55A patent/GB769865A/en not_active Expired
- 1955-06-25 FR FR1126708D patent/FR1126708A/en not_active Expired
- 1955-07-06 US US520344A patent/US2874802A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1329817A (en) * | 1917-07-05 | 1920-02-03 | Int Precipitation Co | Art of precipitating suspended material from gases |
US1329737A (en) * | 1919-03-19 | 1920-02-03 | Int Precipitation Co | Method of precipitating suspended material from furnace-gases |
US1905993A (en) * | 1930-08-29 | 1933-04-25 | Int Precipitation Co | Treatment of gases |
US2171617A (en) * | 1937-02-13 | 1939-09-05 | Research Corp | Gas treatment |
US2748889A (en) * | 1955-06-08 | 1956-06-05 | Research Corp | Electrostatic precipitator |
Cited By (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3501898A (en) * | 1965-03-05 | 1970-03-24 | Svenska Flaektfabriken Ab | Emitting electrode assembly for electrostatic precipitators |
US3958961A (en) * | 1973-02-02 | 1976-05-25 | United States Filter Corporation | Wet electrostatic precipitators |
US3958960A (en) * | 1973-02-02 | 1976-05-25 | United States Filter Corporation | Wet electrostatic precipitators |
US4074983A (en) * | 1973-02-02 | 1978-02-21 | United States Filter Corporation | Wet electrostatic precipitators |
US3988130A (en) * | 1975-09-24 | 1976-10-26 | The Trane Company | Electrostatic precipitator with rapper and pneumatic flow blocking |
US4265641A (en) * | 1979-05-18 | 1981-05-05 | Monsanto Company | Method and apparatus for particle charging and particle collecting |
US4455155A (en) * | 1982-07-30 | 1984-06-19 | Allis-Chalmers Corp. | Electrostatic collecting assembly |
US5160351A (en) * | 1990-06-09 | 1992-11-03 | Metallgesellschaft Aktiengesellschaft | Process of and apparatus for cleaning a dedusting electrostatic precipitator |
US5624476A (en) * | 1991-08-21 | 1997-04-29 | Ecoprocess | Method and device for purifying gaseous effluents |
US6235088B1 (en) * | 1997-04-21 | 2001-05-22 | Kazuo Matsuura | Alcohol separator for an alcohol solution |
US6533841B1 (en) * | 1997-06-30 | 2003-03-18 | Toftejorg A/S | Method and rinsing equipment for the cleaning of especially filter plates in an electro-filter |
US6488740B1 (en) | 2000-03-01 | 2002-12-03 | Electric Power Research Institute, Inc. | Apparatus and method for decreasing contaminants present in a flue gas stream |
US20100024697A1 (en) * | 2003-04-11 | 2010-02-04 | Stockhausen, Inc. | Preparation of fuel usable in a fossil-fuel-fired system |
US8117975B2 (en) | 2003-04-11 | 2012-02-21 | Evonik Stockhausen, Llc | Fossil-fuel-fired system having reduced emissions and method of operating the same |
US8425631B2 (en) | 2003-04-11 | 2013-04-23 | Evonik Stockhausen, Llc | Fuel usable to control the emissions and/or opacity of gas released into the atmosphere |
US8257451B2 (en) | 2003-04-11 | 2012-09-04 | Evonik Stockhausen, Llc | Preparation of fuel usable in a fossil-fuel-fired system |
US20040261673A1 (en) * | 2003-04-11 | 2004-12-30 | Allen Gary W. | Reduced-emissions fossil-fuel-fired system |
US20100024290A1 (en) * | 2003-04-11 | 2010-02-04 | Stockhausen, Inc. | Fuel usable to control the emissions and/or opacity of gas released into the atmosphere |
US7297182B2 (en) | 2005-03-02 | 2007-11-20 | Eisenmann Corporation | Wet electrostatic precipitator for treating oxidized biomass effluent |
US7318857B2 (en) | 2005-03-02 | 2008-01-15 | Eisenmann Corporation | Dual flow wet electrostatic precipitator |
US20060226373A1 (en) * | 2005-03-02 | 2006-10-12 | Eisenmann Corporation | Wet electrostatic precipitator for treating oxidized biomass effluent |
US20060261265A1 (en) * | 2005-03-02 | 2006-11-23 | Eisenmann Corporation | Dual flow wet electrostatic precipitator |
US7132009B2 (en) * | 2005-03-08 | 2006-11-07 | Fancy Food Service Equipment Co., Ltd. | Air filter device for air exhauster |
US20060201328A1 (en) * | 2005-03-08 | 2006-09-14 | Fancy Food Service Equipment Co., Ltd. | Air filter device for air exhauster |
US20070009411A1 (en) * | 2005-07-08 | 2007-01-11 | Eisenmann Corporation | Method and apparatus for particulate removal and undesirable vapor scrubbing from a moving gas stream |
US20070128090A1 (en) * | 2005-12-06 | 2007-06-07 | Eisenmann Corporation | Wet electrostatic liquid film oxidizing reactor apparatus and method for removal of NOx, SOx, mercury, acid droplets, heavy metals and ash particles from a moving gas |
US8088198B2 (en) * | 2006-06-07 | 2012-01-03 | Alstom Technology Ltd | Wet electrostatic precipitator |
US20090114092A1 (en) * | 2006-06-07 | 2009-05-07 | Sune Bengtsson | Wet electrostatic precipitator |
US7662219B2 (en) * | 2007-03-05 | 2010-02-16 | Hitachi Plant Technologies, Ltd. | Wet type electrostatic precipitator |
US20080216658A1 (en) * | 2007-03-05 | 2008-09-11 | Hitachi Plant Technologies, Ltd. | Wet-type electrostatic precipitator |
US20110252965A1 (en) * | 2008-11-20 | 2011-10-20 | Fachhochschule Gelsenkirchen | Wet-cleaning electrostatic filter for cleaning exhaust gas and a suitable method for the same |
US9321056B2 (en) * | 2008-11-20 | 2016-04-26 | Westfaelische Hochschule Gelsenkirchen, Bocholt, Recklinghausen | Wet-cleaning electrostatic filter for cleaning exhaust gas and a suitable method for the same |
US10926272B2 (en) * | 2017-06-30 | 2021-02-23 | Das Environmental Expert Gmbh | Electrostatic precipitator and method for electrostatic precipitation of materials out of an exhaust gas flow |
Also Published As
Publication number | Publication date |
---|---|
GB769865A (en) | 1957-03-13 |
DE1009163B (en) | 1957-05-29 |
FR1126708A (en) | 1956-11-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2874802A (en) | Method for cleaning the electrodes in electro-filters | |
US4072477A (en) | Electrostatic precipitation process | |
US2207576A (en) | Method and apparatus for removing suspended matter from gases | |
US4293319A (en) | Electrostatic precipitator apparatus using liquid collection electrodes | |
JPS59206026A (en) | Method and apparatus for washing filter element of gas filter | |
US1543942A (en) | Method for cleaning gas | |
US2615529A (en) | Electrostatic precipitator | |
DE4109349A1 (en) | METHOD FOR SEPARATING PARTICLES FROM A FLUE GAS FLOW AND ELECTROSTATIC DEPOSIT DEVICE WITH WET MOISTURED WALLS AND LIQUID RECIRCULATION | |
GB556939A (en) | Improved method of and apparatus for removing dust or other foreign particles from gas or air | |
GB1412299A (en) | Dust filter apparatus | |
CN105413871A (en) | Process and device for removing ash of high-temperature electrostatic precipitator by sectional spraying coupling with water film flushing | |
US2528087A (en) | Apparatus for spray coating | |
US1444092A (en) | Apparatus for electrical separation of suspended particles from gases | |
NO752634L (en) | ||
US2316491A (en) | Gas handling apparatus | |
US2800192A (en) | Electrostatic precipitator | |
US2077996A (en) | Eliminator plate washer | |
US2608266A (en) | Gas flow control for electrical precipitators and the like | |
ATE106284T1 (en) | DEVICE FOR CLEANING IN FRONT OF MOVING RAILS. | |
JP2020065974A (en) | Wet electric dust collector | |
US1865245A (en) | Apparatus for cleaning and charging air filters | |
US2658582A (en) | Liquid washed electrical precipitator | |
US3413781A (en) | Sonic aerosol filtering devices | |
US3505786A (en) | Gas filter apparatus | |
US1764424A (en) | Cleaning machine |