EP0010784A1 - Dispositif et méthode pour éviter la formation d'un tourbillon salissant, lors de l'aération des isolateurs dans les électrofiltres - Google Patents

Dispositif et méthode pour éviter la formation d'un tourbillon salissant, lors de l'aération des isolateurs dans les électrofiltres Download PDF

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Publication number
EP0010784A1
EP0010784A1 EP79200485A EP79200485A EP0010784A1 EP 0010784 A1 EP0010784 A1 EP 0010784A1 EP 79200485 A EP79200485 A EP 79200485A EP 79200485 A EP79200485 A EP 79200485A EP 0010784 A1 EP0010784 A1 EP 0010784A1
Authority
EP
European Patent Office
Prior art keywords
nozzles
gas
filter
ventilation
filter wall
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.)
Withdrawn
Application number
EP79200485A
Other languages
German (de)
English (en)
Inventor
Wolfgang Hartmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GEA Group AG
Original Assignee
Metallgesellschaft AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Metallgesellschaft AG filed Critical Metallgesellschaft AG
Publication of EP0010784A1 publication Critical patent/EP0010784A1/fr
Withdrawn legal-status Critical Current

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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

Definitions

  • the invention relates to a device and a method for preventing the formation of a vortex leading to contamination in the ventilation of insulators in electrostatic filters, consisting of an insulating body arranged above or in an opening of the filter wall, a cap supported on the insulating body, on which the supporting device for the live conductors Parts of the electrostatic precipitator is fastened around the insulating body in the filter wall with the outlet openings directed downwards for the introduction of ventilation gases, a nozzle arranged around the outlet openings of the nozzles under the filter wall and gas-tightly connected to the filter wall Flushing pipe with a narrowed outlet cross-section, the outlet opening of which flows into the gas space of the electrostatic precipitator or into connecting pieces to the gas space, and a pressure space arranged above the nozzles for the supply of the ventilation gases.
  • the high-voltage parts of the filter are attached to insulators, which isolate them from the earthed parts of the filter wall. Since the isolators are at least partially connected to the gas space of the filter, there is a risk of contamination of the surfaces of the isolators.
  • the dirt usually has a lower insulation capacity and also likes to absorb moisture, which makes the insulator more or less conductive. In many cases, dirt or dust is naturally electrically conductive. It must therefore be prevented that dust settles on the surface of the insulators.
  • the insulating body is arranged in a flushing pipe into which ventilation gases are conducted which flow from the outlet opening of the flushing pipe into the gas space of the filter.
  • the gas flow is intended to prevent dust from entering the flushing pipe.
  • the ventilation gases are passed from a ring line by means of pipes vertically downwards into a tapered purge pipe.
  • the ventilation gases are sucked horizontally into the purge pipe through an annular gap.
  • the ventilation gases are introduced through a feed line into a cylindrical flushing pipe and, after leaving the flushing pipe, flow onto a baffle plate arranged under the outlet opening.
  • the invention has for its object to prevent the formation of eddies and the pollution of the insulators caused thereby with all operating conditions with certainty.
  • baffle plates are arranged below the openings of the nozzles in the flushing pipe perpendicular to the jet axis and symmetrically to the jet axis of the nozzles.
  • Particularly favorable flow conditions are achieved through an annular arrangement of the nozzles and a round cross section of the flushing pipe.
  • the outlet cross section of the flushing pipe is expediently kept just above the size necessary to avoid flashovers.
  • bell-shaped insulators which are arranged above the flushing pipe, the pressure space for the supply of the ventilation gases is designed in a circular shape.
  • the sealing of the insulating body with respect to the filter can then take place in such a way that seals are placed between the cap and the insulating body and the insulating body and the filter wall, which give a gas-tight seal under the load from the supporting device attached to the cap.
  • Covering the bell-shaped insulator with a pressure chamber which is also possible, is more complex.
  • shaft-shaped insulators which are arranged partly above and partly inside the flushing pipe, the upper part is enclosed by the pressure chamber.
  • cleaned gas can also be recirculated as ventilation gas.
  • the baffle plates can also be combined into an annular disc.
  • the nozzles should be made as precisely as possible.
  • a preferred embodiment is that the surfaces of the baffle plates are concave. As a result, particularly favorable flow conditions are achieved.
  • the edges of the baffle plates can be designed with slots.
  • baffle plates are arranged at a distance of 10 to 80 mm from the outlet openings of the nozzles. This also results in particularly good flow conditions.
  • a preferred embodiment is that the lower part of the flushing tube is cylindrical. This results in a parallel flow to the support device and a favorable outflow.
  • a preferred method for operating the device according to the invention is that the ventilation gases are blown from the pressure chamber through the nozzles in such a distribution and quantity into the flushing pipe that the kinetic energy of the gas streams emerging from the nozzles is deflected, deflected and distributed on the baffle plates is converted and destroyed to the extent that a uniform flow is maintained over the entire cross-sectional area of the outlet opening of the flushing pipe.
  • a preferred method is that a gas pressure is constantly maintained in the pressure chamber, which results in a pressure difference of 0.1 to 0.2 bar compared to the pressure prevailing in the gas chamber of the electrostatic filter. Due to the high degree of throttling, the same amount of gas is supplied through all nozzle bores, thereby achieving favorable flow conditions in the flushing pipe.
  • a preferred method is that the aeration gas is compressed to 0.08 to 0.1 bar and simultaneously heated before being fed into the pressure chamber. In addition to generating good flow conditions, separate heating of the gases is therefore unnecessary.
  • a circular opening 2 is arranged in the filter wall 1 (in FIG. 1 the ceiling of the filter; in FIG. 2 a connection piece to the actual filter housing).
  • a bell-shaped insulator 3 is arranged above the opening 2.
  • a shaft-shaped insulator 3 is arranged in the opening 2.
  • the carrying device 4 is attached to a cap 5.
  • Circular nozzles 6 are arranged in the filter wall 1 around the insulating body 3, the outlet openings of which are directed vertically downwards.
  • the flushing pipe 7 is arranged gas-tight under the filter wall 1 around the nozzles 6. Its outlet cross section is reduced with the help of a conical intermediate piece.
  • the lower part is of cylindrical design.
  • the outlet opening of the flushing pipe 7 opens directly into the gas space 8 of the filter; in Fig. 2 in the gas space of the connector 8a, which is in communication with the gas space 8 of the filter.
  • An annular pressure chamber 9 is located above the nozzles 6 in FIG. 1 arranged with supply device 10 for the ventilation gases.
  • Fig. 2 the entire upper part of the insulator 3 is enclosed by a pressure chamber 9.
  • baffle plates 11 are arranged below the outlet openings of the nozzles 6 perpendicular to and symmetrical to the steel axis of the nozzles 6, the surfaces of which are concave.
  • the advantages of the invention are that in all operating conditions, even with fluctuations in the electrostatic precipitator, a steady flow of the ventilation gases with flow conditions is reliably achieved in the purge tube, which avoids eddy formation in the purge tube, and therefore no dust can get into the purge tube and leads to contamination of the insulator surface.

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  • Electrostatic Separation (AREA)
EP79200485A 1978-10-27 1979-09-04 Dispositif et méthode pour éviter la formation d'un tourbillon salissant, lors de l'aération des isolateurs dans les électrofiltres Withdrawn EP0010784A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19782846798 DE2846798A1 (de) 1978-10-27 1978-10-27 Vorrichtung und verfahren zur verhinderung einer zur verschmutzung fuehrenden wirbelbildung bei der belueftung von isolatoren in elektrofiltern
DE2846798 1978-10-27

Publications (1)

Publication Number Publication Date
EP0010784A1 true EP0010784A1 (fr) 1980-05-14

Family

ID=6053275

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79200485A Withdrawn EP0010784A1 (fr) 1978-10-27 1979-09-04 Dispositif et méthode pour éviter la formation d'un tourbillon salissant, lors de l'aération des isolateurs dans les électrofiltres

Country Status (3)

Country Link
EP (1) EP0010784A1 (fr)
JP (1) JPS5559854A (fr)
DE (1) DE2846798A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3209412C2 (de) * 1982-03-16 1985-10-17 Metallgesellschaft Ag, 6000 Frankfurt Vorrichtung zur Reinhaltung von Stützisolatoren in Elektroabscheidern

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE463528C (de) * 1927-06-19 1928-07-30 Metallbank Isolationsschutz fuer Hochspannungsisolatoren elektrischer Gasreinigungsanlagen, insbesondere fuer die Braunkohlenbrikettindustrie
DE488155C (de) * 1924-09-02 1929-12-23 Siemens Schuckertwerke Akt Ges Verfahren und Vorrichtung zur Verhinderung von Staubablagerungen auf den Isolatoren elektrischer Gasreiniger
DE505686C (de) * 1925-12-23 1930-08-23 Siemens Schuckertwerke Akt Ges Vorrichtung zur Verhinderung von Staubablagerungen auf den Isolatoren elektrischer Gasreiniger
CH224043A (de) * 1942-02-05 1942-10-31 Porzellanfabrik Langenthal A G Isolator an elektrischen Entstaubungsapparaten.
DE1765569B1 (de) * 1968-06-11 1973-08-16 Rhein Westfael Isolatoren Einrichtung zum schutz elektrischer durchfuehrungsisolatoren gegen starke verschmutzung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE488155C (de) * 1924-09-02 1929-12-23 Siemens Schuckertwerke Akt Ges Verfahren und Vorrichtung zur Verhinderung von Staubablagerungen auf den Isolatoren elektrischer Gasreiniger
DE505686C (de) * 1925-12-23 1930-08-23 Siemens Schuckertwerke Akt Ges Vorrichtung zur Verhinderung von Staubablagerungen auf den Isolatoren elektrischer Gasreiniger
DE463528C (de) * 1927-06-19 1928-07-30 Metallbank Isolationsschutz fuer Hochspannungsisolatoren elektrischer Gasreinigungsanlagen, insbesondere fuer die Braunkohlenbrikettindustrie
CH224043A (de) * 1942-02-05 1942-10-31 Porzellanfabrik Langenthal A G Isolator an elektrischen Entstaubungsapparaten.
DE1765569B1 (de) * 1968-06-11 1973-08-16 Rhein Westfael Isolatoren Einrichtung zum schutz elektrischer durchfuehrungsisolatoren gegen starke verschmutzung

Also Published As

Publication number Publication date
JPS5559854A (en) 1980-05-06
DE2846798A1 (de) 1980-05-08

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Inventor name: HARTMANN, WOLFGANG