EP1691931A1 - Vorrichtung zur elektrostatischen partikelabscheidung in gasströmen - Google Patents
Vorrichtung zur elektrostatischen partikelabscheidung in gasströmenInfo
- Publication number
- EP1691931A1 EP1691931A1 EP04789813A EP04789813A EP1691931A1 EP 1691931 A1 EP1691931 A1 EP 1691931A1 EP 04789813 A EP04789813 A EP 04789813A EP 04789813 A EP04789813 A EP 04789813A EP 1691931 A1 EP1691931 A1 EP 1691931A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrode
- flue gas
- free
- hanging
- particle separation
- 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.)
- Granted
Links
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
- B03C3/66—Applications of electricity supply techniques
- B03C3/68—Control systems therefor
-
- 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
-
- 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
- B03C2201/00—Details of magnetic or electrostatic separation
- B03C2201/10—Ionising electrode has multiple serrated ends or parts
Definitions
- EP 1 193 445 A2 of the E PA presents a device for flue gas cleaning on small fire rings, which can be installed in the existing flue gas duct of such a furnace.
- Either this flue gas duct is electrically conductive, in that the stovepipe is made of sheet steel, chrome steel or aluminum, or the chimney is made entirely of stone and masonry or of plastic.
- the device forms a cover which can be placed gas-tight on an associated opening on the flue gas duct.
- a spray electrode is held on the inside of this cover via insulators.
- the device also includes a high-voltage generator for establishing a direct voltage between this spray electrode and the inner wall of the electrically conductive flue gas duct section.
- a section of an electrically conductive tube is mounted on the lid to form a collector surface.
- the typical connection value of the electrode is between 10 and 50VA and it can be operated with 220V / 50Hz or 110V / 60Hz alternating current.
- the spray electrode can be charged negative or positive to earth.
- the collector part can be easily cleaned by hand after removing the electrode wire with the holder.
- the object of the present invention is therefore to provide a device for electrostatic particle separation in gas streams, which is particularly suitable for flue gas cleaning on small furnaces, and which enables efficient separation of the finest particles by means of a rod-shaped spray electrode, that is, particles with a diameter ⁇ 10 ⁇ m, and can achieve an efficiency of up to 90%.
- this device should come up with reasonable purchase and operating costs and should be easy to monitor and clean by the operator even at sufficiently long intervals. It should also be retrofittable in a flue gas pipe and this also in the living area, where there are many such furnaces.
- the device is intended to overcome the disadvantages of a rod-like spray electrode described above and to greatly reduce or even completely prevent its oscillation.
- the device takes advantage of the fact that the chimney previously acted as a separating surface in small combustion systems, but not consistently as a result of an electrical charge.
- the chimney previously acted as a separating surface in small combustion systems, but not consistently as a result of an electrical charge.
- chrome steel or aluminum in sheet steel, chrome steel or aluminum, as are widely built today, there is already an electrically conductive separating surface.
- a chrome steel pipe can be retrofitted lengthways into the flue gas duct over a certain distance.
- the immediately obvious advantages of this device are that it is an electrostatic precipitator that has no separate separator plates, that does not require a flue gas fan, does not result in a significant narrowing of the flue gas duct, and that its separating zone can be dimensioned as required.
- Figure 1 A device for installation in a straight, vertical section of an electrically conductive stovepipe with an electrode tapering towards the ends;
- Figure 2 A device with schematically drawn active electrode stabilization
- Figure 3 The device of Figure 2 seen in a cross section through the flue gas pipe, with the associated controller for the variation of the collector voltages;
- Figure 4a A device with an electrode without its stabilization
- Figure 4b A device with a schematically shown passive electrode stabilization.
- a first embodiment of a device for electrostatic particle separation in gas flows is shown, which is also suitable for flue gas cleaning on small furnaces. It is designed for installation in a straight section of an existing, electrically conductive stovepipe 1.
- the device has an electrode holder 6 made of metal, preferably of stainless steel, which is provided with a bore for receiving the electrode 4.
- the socket 6, with an electrode thickness of 0.3 mm in the socket area has a diameter of several millimeters and is held in a metallic holder 7 by a clamp or bayonet connection, as shown in the enlarged section.
- the holder 7 is attached to a holding rod 2, which is also preferably made of stainless steel.
- the holding rod 2 is guided through an insulator 3 into the flue gas pipe 1.
- the insulator 3 is advantageously made of a plastic, for which polyether ether ketone (PEEK) is suitable, because this material has a certain Charge migration allows so that no charge nests can form, but charges flow continuously. In contrast, with a porcelain or ceramic insulator under DC voltage, charge nests are formed, which then migrate outwards and lead to spontaneous breakthroughs (TE).
- the insulator 3 is firmly connected to the cover 5.
- the socket 6 can be cylindrical or, as shown here, spherical, with a diameter of approximately 10 mm and a central bore in which the electrode 4 sits and is held.
- the opening on the furnace tube 1 is designed so large that the holder 7 can be inserted into the furnace tube 1 by elastic bending of the wire 4, and after that the opening 1 is closed gas-tight, for which purpose suitable clamping clips, clamping levers or clamping screws are available ,
- a high-voltage generator with a rectifier function is electrically and thermally insulated from the stovepipe 1 and is supplied with power via a mains cable.
- the high-voltage output is passed through the insulator 3 via the socket 6 to the spray electrode 4.
- the other pole is at earth potential and is electrically conductively connected to the stovepipe 1, which acts as a separating surface with respect to the electrode 4.
- the wire 4 shown here were of the same thickness, it would begin to oscillate immediately after application of a high voltage, and the oscillation would be quickly rocked, because the tip of the electrode wire 4 is negatively charged, for example, during that Stove tube 1 is positively charged with respect to the wire tip.
- the wire tip is attracted to the stovepipe wall and after reaching a maximum deflection, the electrode 4 swings back in the other direction due to its mechanical elasticity and vice versa.
- the oscillation leads to the wire tip striking the stovepipe wall and to rapid swinging back and forth within the stovepipe 1, with frequencies of up to a few Hz, which causes unpleasant noises that can be heard in a building. Remedial action is provided by the tapering of the wire electrode 4 towards its ends, which is visible here.
- This taper is ideally parabolic, but can also be linear. It has been shown that an electrode with a length of 25cm on both sides and a thickness of 0.3mm in the area of the socket and 0.1mm thickness at the tip hardly vibrates anymore. With a wire electrode of 30 cm length on both sides and a taper that goes from a thickness of 0.3 mm in the socket down to 0.08 mm at the tip, whereby the electrode is arranged along the center of a tube 1 of 120 mm to over 250 mm in diameter, is hardly there is more vibration of the whole electrode. Only in the area of the tip it swings back and forth by a few mm, and this also applies to voltages of up to 20kV.
- this electrode is made of tungsten, because it has an increased modulus of elasticity compared to approximately ⁇ ogonübc ⁇ stainless steel and therefore allows a greater length than a steel wire with the same thickness. With such an electrode, namely a tapered tungsten wire, it is possible to separate up to 90% of the particles in the flue gas.
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Electrostatic Separation (AREA)
- Chemical Vapour Deposition (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH02042/03A CH694645A5 (de) | 2003-12-01 | 2003-12-01 | Vorrichtung zur elektrostatischen Partikelabscheidung in Gasströmen. |
PCT/CH2004/000638 WO2005053852A1 (de) | 2003-12-01 | 2004-10-22 | Vorrichtung zur elektrostatischen partikelabscheidung in gasströmen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1691931A1 true EP1691931A1 (de) | 2006-08-23 |
EP1691931B1 EP1691931B1 (de) | 2009-05-06 |
Family
ID=34427770
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04789813A Not-in-force EP1691931B1 (de) | 2003-12-01 | 2004-10-22 | Vorrichtung zur elektrostatischen partikelabscheidung in gasströmen |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1691931B1 (de) |
AT (1) | ATE430624T1 (de) |
CH (1) | CH694645A5 (de) |
DE (1) | DE502004009470D1 (de) |
WO (1) | WO2005053852A1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007010973B4 (de) * | 2007-03-05 | 2008-10-16 | Schmatloch Nückel Technologietransfer | Elektrofilter für eine Kleinfeuerungsanlage |
CH697348B1 (de) * | 2007-11-29 | 2008-08-29 | Rueegg Cheminee Ag | Vorrichtung zur Abgasreinigung von Feuerungsanlagen. |
DE102008009258A1 (de) * | 2008-02-15 | 2009-08-20 | Brandenburgische Technische Universität Cottbus | Vorrichtung und Verfahren zur Aufladung von Aerosolen |
DE102008049211B4 (de) | 2008-09-27 | 2011-08-25 | Karlsruher Institut für Technologie, 76131 | Elektrostatischer Abscheider für die Reinigung von Rauchgasen |
DE102009030803A1 (de) | 2009-06-27 | 2011-01-05 | Karlsruher Institut für Technologie | Elektrostatischer Abscheider zur Rauchgasreinigung mit einem elektrischen Sperrfeld |
DE102010046800A1 (de) | 2010-09-28 | 2012-03-29 | Karlsruher Institut für Technologie | Kollektorstufe eines elektrostatischen Abscheiders zur Reinigung von aus Verbrennungsprozessen entstandenem Rauchgas und Verfahren zum Betreiben |
CN109806975B (zh) * | 2019-01-30 | 2024-03-01 | 浙江大学 | 一种强化均匀放电装置及方法 |
DE102019105776A1 (de) | 2019-03-07 | 2020-09-10 | Karlsruher Institut für Technologie | Elektrostatischer Abscheider für die Reinigung von Rauchgasen |
CA3152394C (en) | 2019-09-03 | 2022-11-22 | Sl-Technik Gmbh | Biomass heating system with optimized flue gas treatment |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1983000297A1 (en) * | 1981-07-24 | 1983-02-03 | Rodney John Truce | Detecting, measuring and applying back corona parameters on an electrostatic precipitator |
DE3138601A1 (de) * | 1981-08-01 | 1983-04-14 | Metallgesellschaft Ag, 6000 Frankfurt | Verfahren zur befetigung von bandfoermigen spruehelektroden |
DE3324803A1 (de) * | 1983-07-09 | 1985-01-17 | Betriebsforschungsinstitut VDEh - Institut für angewandte Forschung GmbH, 4000 Düsseldorf | Staubabscheidegeraet |
DE19841311A1 (de) * | 1998-09-10 | 2000-03-16 | Heinz Hoelter | Wolfram-Spitzenionisator mit erniedrigter Ladungsträger-Emissionsenergie (Austrittsarbeit) |
CH695113A5 (de) * | 2000-10-02 | 2005-12-15 | Empa | Vorrichtung zur Rauchgasreinigung an Kleinfeuerungen. |
-
2003
- 2003-12-01 CH CH02042/03A patent/CH694645A5/de not_active IP Right Cessation
-
2004
- 2004-10-22 AT AT04789813T patent/ATE430624T1/de active
- 2004-10-22 WO PCT/CH2004/000638 patent/WO2005053852A1/de active Application Filing
- 2004-10-22 EP EP04789813A patent/EP1691931B1/de not_active Not-in-force
- 2004-10-22 DE DE502004009470T patent/DE502004009470D1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2005053852A1 * |
Also Published As
Publication number | Publication date |
---|---|
CH694645A5 (de) | 2005-05-13 |
DE502004009470D1 (de) | 2009-06-18 |
WO2005053852A1 (de) | 2005-06-16 |
ATE430624T1 (de) | 2009-05-15 |
EP1691931B1 (de) | 2009-05-06 |
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