EP1515806A1 - Durchf hrung f r elektrische hochspannung durch eine wa nd, die einen umgebungsbereich von einem prozessbereich trennt - Google Patents
Durchf hrung f r elektrische hochspannung durch eine wa nd, die einen umgebungsbereich von einem prozessbereich trenntInfo
- Publication number
- EP1515806A1 EP1515806A1 EP03725015A EP03725015A EP1515806A1 EP 1515806 A1 EP1515806 A1 EP 1515806A1 EP 03725015 A EP03725015 A EP 03725015A EP 03725015 A EP03725015 A EP 03725015A EP 1515806 A1 EP1515806 A1 EP 1515806A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- truncated cone
- voltage bushing
- process area
- voltage
- 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
- B03C3/70—Applications of electricity supply techniques insulating in electric separators
-
- 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
- B03C3/86—Electrode-carrying means
Definitions
- Feed-through for electrical high voltage through a wall that separates an environmental area from a process area :
- the invention relates to a bushing for high electrical voltage through a wall, which separates a surrounding area from a process area.
- the process area has at least one atmosphere in its entrance area which is contaminated / contaminated with liquid droplets (aerosols) and / or soot / dust particles and is therefore kept separate from the environment.
- Such devices are electrostatic precipitators or electrostatic wet cleaners. They are used to remove such contaminants from air / gases. The precipitation process is accomplished by electrostatically charging and collecting the charged particles on grounded electrodes. For this, high-voltage electrical must be conducted from a source in the area to corresponding high-voltage equipment in the process area.
- electrostatic precipitators and electrostatically reinforced wet cleaners remove particles from flue gas.
- Many facilities have been developed in recent years in which a reduction in size has been accompanied by an increase in long-term stability. High-voltage bushings are often led through the wall or attached to an extension.
- An electrostatic high voltage shield can be used to prevent particle deposition on the insulator (see WO 00/30755).
- the conductive sheath is connected to the same high voltage source as the discharge electrode, so that the high electric field is generated in the area between the sheath and the nearby grounded surface of the housing. Accordingly, the charged droplets or in the gas Particles precipitated on the grounded surface and not on the high voltage insulator.
- the insulator is warmed because condensation can cause a reduction in the high voltage at the electrical connection.
- An electrostatic heater is connected to the insulator to keep it at 10 ° C or more higher than the surrounding gas temperature. Also to avoid steam condensation, a few degrees C are usually sufficient.
- the insulator is also heated by injecting dry, warm cleaning gas into the shield surrounding the insulator (US Pat. No. 6,156,098 or WO 00/47326). Movement of air flow around the isolator is used to keep the isolator on its surface free of moisture and dust and helps to keep the isolator clean and generally free from flashovers.
- air is supplied with a blower or other air pressure-generating means, air cooling and controlled heating as well as cleaning in connection with air conditioning are provided in the failure device to a certain extent.
- the self-cleaning venturi isolator for an electrostatic failure is described in US 5,421,863.
- the insulator is made of a dielectric material, into which an arc / flashover can be very difficult to burn.
- the effect of directing the air flow through a venturi nozzle is used to protect the surface of the insulator from the deposition of contaminants from flue gas.
- the effectiveness of gas cleaning depends on the reliability of the high-voltage device.
- Good electrical high-voltage insulator materials which are available in a wide variety, and geometries suitable for the environment and the process area, and in particular made therefrom, are of crucial importance.
- the high voltage insulator is exposed to the charged / uncharged particles suspended in the gas as well as to any condensable vapor that may be present.
- the accumulation of condensed material on the insulator affects its insulation property. Therefore, the insulator must be kept free from deposits of impurities and the resulting flashover.
- the cleaning intervals must also be extended. In addition, the cost of manufacturing while maintaining or even improving the insulation properties must be reduced.
- the task is solved in principle by a high-voltage implementation with the features of claim 1. It consists of a dielectric, high-voltage-resistant and creep-resistant material, such as glass or PTFE (polytetrafluoroethylene) or glazed ceramic, which on the one hand has good casting (glass) or good formability (ceramic) and on the other hand can be machined (PTFE) in its source material (s) is.
- a dielectric, high-voltage-resistant and creep-resistant material such as glass or PTFE (polytetrafluoroethylene) or glazed ceramic, which on the one hand has good casting (glass) or good formability (ceramic) and on the other hand can be machined (PTFE) in its source material (s) is.
- the body of the high-voltage bushing consists of two coaxially connected basic geometric structures: a cylinder and a truncated cone.
- the cylinder merges into the truncated cone with a smaller end surface on its one end facing the process area. This face of the cylinder and the frustum of the cone are completely exposed in the process area, the free face of the cylinder is exposed to the environment.
- the outer radius of the cylinder is larger than that of this smaller end face of the truncated cone.
- a central hole goes through the body, through which the high voltage is led through a sealed electrical conductor.
- At least two equally distributed, axially parallel bores pass through the cylinder.
- air or gas from the environment is pressed through them with a pump or a fan and the surface of the truncated cone is flown against.
- the jacket of the high-voltage bushing sits tightly in the wall that separates the environment from the process area.
- the clear width of such a bore is not constant over the length, in particular for the air / gas outlet into the process environment, in order to have the truncated cone as completely as possible at its attachment to the cylinder, depending on the axial bores distributed around the circumference to flow towards the scope.
- the clear width at the outlet of the bore is at most so wide that it does not enter the outer wall of the truncated cone (claim 3). It is equally effective if these holes in the floor open into an annular groove concentric to the axis with at least the inner radius equal to the radius of the front end of the truncated cone.
- the bores are provided with a lip at their respective exit, in particular if the opening angle of the truncated cone / cone is less than 20 °, which directs the air / gas flow correspondingly strongly towards it due to the inclination towards the axis.
- edges exposed in the process area are rounded according to claim 5.
- the large end face of the truncated cone (2), which is exposed in the process area, is flat or funnel-shaped in a kind of basic structure or conical in the process environment (claim 6).
- the large end face of the truncated cone can extend coaxially and with at least the clear width of the electrical conductor to be hollow-cylindrical by a predetermined length in the process environment to extend the creepage distance (claim 7).
- the large end face of the truncated cone can be provided with at least one U-shaped or V-shaped cross-section for electrical strength (claim 8). For this very reason, this can also be extended to the coaxial extension (claim 9).
- at least one U- or V-shaped annular groove is embedded in the lateral surface of the truncated cone. An axial creep path, for example, would then meander and is therefore considerably longer. If the edges of the annular gap or rings are round (deposits 11), deposits that can or are electrically problematic are easier to rinse off.
- the recessed approach of the truncated cone to the cylinder is described in claim 12 and may be the insulation-effective solution for reasons of space savings.
- the end of the cylinder exposed in the process area is recessed in the shape of a truncated cone.
- the truncated cone now begins at the bottom of this depression, forming a funnel-shaped gap with the cylinder. This gap remains constant towards the process area or widens there.
- the bores in the cylinder around the axis open in this embodiment at the ring base of this funnel-shaped gap. This also avoids a dead zone in terms of flow.
- the high-voltage bushing provided with a heating device is technically more complex, but can be an acceptable solution due to difficult process circumstances and, for example, space restrictions.
- electrical heating in the form of heating rods installed / drawn into the insulator material or a channel through which fluid can flow can be considered.
- the high-voltage bushing has advantages:
- the high-voltage bushing is a single body that is cast or machined from a full body. Both manufacturing techniques can be automated and thus carried out economically.
- the conical part is blown with natural or conditioned air or gas through the axially parallel bores.
- the air that has flowed in has an ambient condition, such as temperature or humidity, and is, for example, blown into the process area by a fan.
- Conditioned means the technically more complex system case, in which the air / gas is cooled or heated, for example above the dew point, and / or is dried and is more or less forced into the process area. This extends the operating time and significantly increases the cleaning intervals.
- FIG. 1 shows the section through the axis of the high-voltage bushing
- Figure 2 shows the high-voltage bushing with a small opening angle of
- FIG. 4 the truncated cone with a free forehead and a rounded edge
- FIG. 6 shows the high-voltage bushing with a U-shaped and V-shaped ring groove
- FIG. 7 shows the installation of the high-voltage bushing in the partition
- FIG. 8 the frustoconical face of the cylinder, which is exposed in the process area
- FIG. 9 shows the frusto-conical front end of the cylinder with circumferential channel, which is exposed in the process area
- a suitable dielectric, high-voltage-resistant and creep-resistant material from which the body of the high-voltage bushing is made is PTFE (polytetrafluoroethylene).
- the body as can be seen in FIG. 1 in section, consists of the cylindrical part 1 and the conical, frustoconical part 2.
- the conical part has the forehead with the smaller diameter D1 and goes concentrically with this forehead into the cylinder with the diameter D3 about.
- the other, free end of the truncated cone with the larger diameter D2 is exposed in the process area.
- the axially parallel bores 4, here 16 are indicated, for example, through the cylinder 1 (see section A-A below), through which air flows here, are concentric with the central bore 3 for the passage of the electrical conductor for the high voltage. This metallic conductor lying tightly in the bore 3 is not indicated.
- the angle ⁇ half the opening angle of the truncated cone, can vary, which also determines the geometric size of the implementation.
- the mass Ll height of the truncated cone 2 or length of the cone 2
- the length L2 of the cylindrical part vary and the diameters Dl, D2 and D3.
- the high-voltage bushing is geometrically adapted from case to case individually and optimally to the system conditions.
- the axially parallel bores through the cylinder 1 open into the concentric annular groove 6 in its forehead exposed in the process area (see FIG. 3, section B-B).
- the inner radius of the annular groove 6 is at least equal to that of the front end of the truncated cone 2.
- the edge concentric to the axis on the free end of the truncated cone 2 is rounded (see FIG. 4).
- the free forehead of the truncated cone is funnel-shaped (see Figure 5). The peripheral edge of this forehead is drawn sharply here, but as in FIG. 4 it can also be rounded.
- FIG. 6a shows u-shaped
- FIG. 6b v-shaped ring grooves 8, that is ring grooves 8 with constant width H, or ring grooves 8 with width H widening outwards
- High-voltage bushing is installed in a system with electrostatically reinforced wet washers, the gap width H of the annular grooves 8 is larger than the liquid drops present in the gas flow to be cleaned, or those that form on the surface.
- the cylindrical part 1 of the high-voltage bushing is tightly installed / used in the wall 9 between the surroundings and the process area.
- this is shown schematically in exemplary variants in FIGS. 7, 8 and 9.
- the axially parallel bores 4 are completely exposed, so that there is a free passage from the surrounding side to the process area.
- air is blown from the surrounding area through the openings 4, which are axially parallel in the cylinder 1, onto the lateral surface of the truncated cone 2, and thus prevents the deposition of solid or liquid particles from flue gas.
- the air including gas, cold or at ambient temperature or warm, is provided with a technical device, such as a fan or a pump (not indicated anywhere in the drawing).
- the purpose of heating the air or gas above the dew point in the process area is to avoid liquid condensation on the surface of the bushing exposed in the process area in order to prevent the tendency to reduce the high-voltage strength of the electrical connection.
- the resulting liquid flow on the inner wall can be diverted through a flange ring 11 around the forehead of the cylinder 1 exposed in the process area, it forms with the cylinder and the inner wall a channel that deflects the incoming liquid from the area of the high-voltage bushing (FIG. 9).
- Figure 10 shows an example of the high-voltage bushing made of PTFE in its dimension for a maximum of 15 kV. Except for the coaxial hollow cylindrical extension into the process environment and the two coaxial ring grooves in the lateral wall of the truncated cone, it is of the simplest design. Their overall length is only 75 mm, their largest diameter is only 48 mm. With its cylindrical part, it can be inserted flush into a 30 mm thick wall. The one around Perimeter equally distributed here 12 holes 3 end with steady
- the central electrical conductor is made of titanium for mechanical, in particular weight, reasons. Tests over hours with a water vapor-saturated, condensing process atmosphere to be cleaned ran at the highest nominal voltage without electrical flashovers.
Landscapes
- Insulators (AREA)
- Electrostatic Separation (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Insulating Bodies (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Paper (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10227703 | 2002-06-21 | ||
DE10227703A DE10227703B3 (de) | 2002-06-21 | 2002-06-21 | Durchführung für elektrische Hochspannung durch eine Wand, die einen Umgebungsbereich von einem Prozessbereich trennt |
PCT/EP2003/003816 WO2004000465A1 (de) | 2002-06-21 | 2003-04-12 | Durchführung für elektrische hochspannung durch eine wand, die einen umgebungsbereich von einem prozessbereich trennt |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1515806A1 true EP1515806A1 (de) | 2005-03-23 |
EP1515806B1 EP1515806B1 (de) | 2006-06-21 |
Family
ID=29795840
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03725015A Expired - Lifetime EP1515806B1 (de) | 2002-06-21 | 2003-04-12 | Durchf hrung f r elektrische hochspannung durch eine wa nd, die einen umgebungsbereich von einem prozessbereich trennt |
Country Status (6)
Country | Link |
---|---|
US (1) | US8039765B2 (de) |
EP (1) | EP1515806B1 (de) |
AT (1) | ATE330706T1 (de) |
AU (1) | AU2003227611A1 (de) |
DE (2) | DE10227703B3 (de) |
WO (1) | WO2004000465A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10366861B2 (en) | 2014-08-25 | 2019-07-30 | Max-Planck-Gesellschaft Zur Foerderung Der Wissenschaften E.V. | High voltage feedthrough assembly, time-resolved transmission electron microscope and method of electrode manipulation in a vacuum environment |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004039124B4 (de) * | 2004-08-11 | 2007-06-14 | Eidgenössische Materialprüfungs- und Forschungsanstalt Empa | Elektrofilter für eine Feuerungsanlage |
AT503022B1 (de) * | 2006-06-29 | 2007-07-15 | Fleck Carl M Dr | Elektrodenaufhängung für filteranordnung |
DE202009013497U1 (de) * | 2009-10-07 | 2011-02-17 | Kutzner + Weber Gmbh | Partikelabscheider mit Sicherheitsabsperrung |
US20160221001A1 (en) * | 2013-09-05 | 2016-08-04 | Regal Beloit America, Inc. | Electrostatic blower and methods of assembling the same |
US10518272B2 (en) * | 2015-02-20 | 2019-12-31 | Current Ways, Inc. | Air cleaner |
CN106583048A (zh) * | 2016-12-27 | 2017-04-26 | 西北工业大学 | 一种用于电除尘器气流分布板的锯齿尾缘结构 |
CN107946005A (zh) * | 2017-05-27 | 2018-04-20 | 国网新疆电力公司经济技术研究院 | 一种应用于强风区的抗风复合绝缘子 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1093447B (de) * | 1959-07-28 | 1960-11-24 | Metallgesellschaft Ag | Vorrichtung zur Verhinderung einer zur Verschmutzung fuehrenden Wirbelbildung bei der Belueftung von Isolatoren in elektrischen Gasreinigungs- oder Emulsionstrennungsanlagen |
GB2046132B (en) * | 1979-04-02 | 1983-02-09 | Environmental Elements Corp | Protector tube for high voltage suspension insulator of an electro-static precipitator |
US4239505A (en) * | 1979-09-07 | 1980-12-16 | Union Carbide Corporation | Purge gas conditioning of high intensity ionization system for particle removal |
DE3238794A1 (de) * | 1982-10-20 | 1984-04-26 | Robert Bosch Gmbh, 7000 Stuttgart | Vorrichtung zum reinigen von gasen |
US4741746A (en) * | 1985-07-05 | 1988-05-03 | University Of Illinois | Electrostatic precipitator |
US5421863A (en) * | 1992-09-11 | 1995-06-06 | Trion, Inc. | Self-cleaning insulator for use in an electrostatic precipitator |
DE19742178C1 (de) * | 1997-09-24 | 1999-04-15 | Siemens Ag | Elektrische Leitungsdurchführung durch eine Gehäusewand |
US6221136B1 (en) * | 1998-11-25 | 2001-04-24 | Msp Corporation | Compact electrostatic precipitator for droplet aerosol collection |
US6156098A (en) * | 1999-02-10 | 2000-12-05 | Richards; Clyde N. | Charged droplet gas scrubber apparatus and method |
DE202005005297U1 (de) * | 2005-04-04 | 2006-08-10 | Cooper Crouse-Hinds Gmbh | Leitungsdurchführungsvorrichtung |
-
2002
- 2002-06-21 DE DE10227703A patent/DE10227703B3/de not_active Expired - Fee Related
-
2003
- 2003-04-12 AU AU2003227611A patent/AU2003227611A1/en not_active Abandoned
- 2003-04-12 AT AT03725015T patent/ATE330706T1/de active
- 2003-04-12 DE DE50303967T patent/DE50303967D1/de not_active Expired - Lifetime
- 2003-04-12 EP EP03725015A patent/EP1515806B1/de not_active Expired - Lifetime
- 2003-04-12 WO PCT/EP2003/003816 patent/WO2004000465A1/de not_active Application Discontinuation
-
2008
- 2008-07-28 US US12/220,666 patent/US8039765B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2004000465A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10366861B2 (en) | 2014-08-25 | 2019-07-30 | Max-Planck-Gesellschaft Zur Foerderung Der Wissenschaften E.V. | High voltage feedthrough assembly, time-resolved transmission electron microscope and method of electrode manipulation in a vacuum environment |
Also Published As
Publication number | Publication date |
---|---|
EP1515806B1 (de) | 2006-06-21 |
AU2003227611A1 (en) | 2004-01-06 |
DE50303967D1 (de) | 2006-08-03 |
US8039765B2 (en) | 2011-10-18 |
DE10227703B3 (de) | 2004-02-12 |
US20090044974A1 (en) | 2009-02-19 |
ATE330706T1 (de) | 2006-07-15 |
WO2004000465A1 (de) | 2003-12-31 |
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