EP0148199A1 - Installation de purification de gaz - Google Patents

Installation de purification de gaz

Info

Publication number
EP0148199A1
EP0148199A1 EP84901976A EP84901976A EP0148199A1 EP 0148199 A1 EP0148199 A1 EP 0148199A1 EP 84901976 A EP84901976 A EP 84901976A EP 84901976 A EP84901976 A EP 84901976A EP 0148199 A1 EP0148199 A1 EP 0148199A1
Authority
EP
European Patent Office
Prior art keywords
channel
electrodes
gases
electrode
conductive particles
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.)
Ceased
Application number
EP84901976A
Other languages
German (de)
English (en)
Inventor
Bernhard Blaich
Klaus Dobler
Dieter Karr
Christian Zrenner
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0148199A1 publication Critical patent/EP0148199A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/01—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust by means of electric or electrostatic 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
    • B03C3/017—Combinations of electrostatic separation with other processes, not otherwise provided for
    • B03C3/0175—Amassing particles by electric fields, e.g. agglomeration
    • 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
    • B03C3/60—Use of special materials other than liquids
    • B03C3/64—Use of special materials other than liquids synthetic resins
    • 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
    • B03C3/82—Housings
    • 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
    • B03C2201/30—Details of magnetic or electrostatic separation for use in or with vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to a device according to the type of the main claim, as is known for example from the magazine C.hem. -Ing. -Techn. 48th year 1976, No. 1, page 33.
  • a major difficulty with such operations is to ensure the electrical insulation between the high-voltage electrodes when cleaning gases from electrically conductive particles. If the electrical insulation is not guaranteed, leakage currents and finally short circuits between the electrodes occur, so that continuous operation of the device is impossible.
  • the device according to the invention with the characterizing features of the main claim has the advantage that a perfect electrical insulation between the electrodes is ensured with simple means.
  • the gases b-charged with conductive particles are completely encapsulated with respect to at least one of the two electrodes, so that the electrical insulation is absolutely ensured with sufficient dielectric strength of the insulating material wall of the channel.
  • the dielectric constant is of the order of magnitude of 2-10, in particular between 2 and 3, the dielectric strength of such insulating materials is very high.
  • the channel has a flat, preferably flat oval cross section with a clear width corresponding to the distance between the essentially flat electrodes.
  • the relatively thin walls of insulating material made of a material with a higher dielectric constant than that of the exhaust gases have practically no influence on the electrical field distribution, i.e. that there is at least twice the field strength inside the duct as in the plastic and that the external high voltage is almost completely inside the duct arises.
  • the channel runs in the space between the electrodes, because such an arrangement is particularly simple to manufacture.
  • the operating temperature is set higher up to values of above 500oC, where deposits are practically completely excluded.
  • the arrangement according to the Invention allows high voltages to be applied to the electrodes without interference. Short circuits and corona discharges do not occur.
  • the device works particularly effectively if the channel is made sufficiently long, because then under the influence of the electric field there is sufficient time for the conductive particles to combine to form larger agglomerates, which are then separated in a particularly simple manner from the mechanical separator Gases can be separated.
  • a meandering design and on the other hand a spiral design of the channel has proven itself.
  • the device with a channel running between two electrodes Figure 2 shows a second embodiment in which the channel encloses an electrode, Figure 3 shows a meandering gate direction and Figure 4 shows a spiral device.
  • the downstream mechanical separator in which the particles agglomerated by electrical polarization forces into larger agglomerates with a larger mass are separated from the gas; not shown in the drawing and also not explained in more detail below, since known devices, in particular centrifugal separators, can be used for this purpose.
  • 10 denotes the positive pole and 11 the negative pole of a DC voltage source with a voltage of approximately 10 kV.
  • the applied DC voltage is dependent on the dimensioning of the device and is selected accordingly, ie the applied voltage is increased with increasing diameter of the device.
  • 12 with a positive electrode and 13 with a negative electrode, which is electrically connected to the positive pole and. negative pole of the voltage source are connected.
  • a channel 14 is formed between the electrodes 12, 13 within an insulating material wall 15, the inner wall of which is designated by 16.
  • the electric field E which forms between the electrodes 12 and 13, passes through the channel 14.
  • the insulating material wall 15 consists, for example, of a plastic tube with a dielectric constant of the order of 2, ie that within the tube in the channel 14 the double electric field strength as in the insulating material of the wall 15.
  • the insulating material wall has a thickness of 2x0.5 cm compared to an electrode spacing of 10 cm, the insulating material has a field strength of approx. 0.5 kV per cm, and an electrical field strength of 1 4 in the channel 1 kV per cm.
  • the device according to the invention achieves absolutely reliable electrical insulation between the two electrodes 12 and 13, with no creepage distance between the electrodes being able to develop. These are separated from one another by a closed, insulated channel 14, so that the gas to be cleaned flows through the insulated line which is penetrated by the electric field E inside the coagulator, like the device because of the agglomeration of the fine particles into larger agglomerates the prevailing electrical field is not weakened by the insulating material wall.
  • conductive particles such as soot or the like can settle on the inner wall of the device.
  • the inner wall 16 of the channel 1 4 is lined with a material with a low coefficient of static friction.
  • PTFE polytetrafluoroethylene
  • FIG. 2 shows arrangements in which the same parts with the same reference numerals as in Figure 1 are designated.
  • an electrode preferably the positive electrode 12
  • the second electrode preferably the negative electrode 13 which can be at ground potential
  • the electrodes 12 and 13 have the same cross section as in the arrangement according to FIG. 1.
  • the insulated arrangement of an electrode 13 within the channel 14 results in a greater electrical flashover resistance.
  • FIG. 3 shows a meandering arrangement of the device, which leads to a correspondingly long length of the channel 14 with a still compact design.
  • the positive electrodes 12 and the negative electrodes 13 are arranged alternately between the straight parts of the channel 14 in such a way that two positive and two negative electrodes lie opposite each other.
  • the isolation problem of the device is simplified. Due to the increased length of the device, the originally quite small conductive particles in the gas have sufficient time to combine under the action of the electric field and the resulting distribution of their charges to form larger agglomerates, which are connected in a downstream mechanical separator, not shown in the figure then can be easily separated from the gases due to centrifugal force.
  • FIG. 4 shows another advantageous compact arrangement, the channel 14 being of spiral design.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrostatic Separation (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

Installation pour purifier des gaz de particules électriquement conductrices, en particulier installation de purification des gaz d'échappement de combustibles fossiles. L'installation possède deux électrodes (12, 13) à haute tension, qui sont isolées électriquement l'une de l'autre par le fait que les gaz à purifier sont amenés par un canal fermé (14).
EP84901976A 1983-07-07 1984-05-21 Installation de purification de gaz Ceased EP0148199A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3324478 1983-07-07
DE19833324478 DE3324478A1 (de) 1983-07-07 1983-07-07 Vorrichtung zum reinigen von gasen

Publications (1)

Publication Number Publication Date
EP0148199A1 true EP0148199A1 (fr) 1985-07-17

Family

ID=6203369

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84901976A Ceased EP0148199A1 (fr) 1983-07-07 1984-05-21 Installation de purification de gaz

Country Status (6)

Country Link
US (1) US4628739A (fr)
EP (1) EP0148199A1 (fr)
JP (1) JPS60501744A (fr)
DE (1) DE3324478A1 (fr)
IT (1) IT8421664A0 (fr)
WO (1) WO1985000408A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4739664A (en) * 1987-02-20 1988-04-26 Ford Motor Company Absolute fluid pressure sensor
US4979364A (en) * 1988-03-11 1990-12-25 Fleck Carl M Diesel fuel exhaust gas filter
DE3810910C1 (fr) * 1988-03-30 1989-08-10 Johannes A. Dipl.-Wirtsch.-Ing. 7980 Ravensburg De Mueller
IT1230462B (it) * 1989-02-10 1991-10-23 Sviluppo Materiali Spa Sistema per l'abbattimento del particolato nei gas di combustione
JPH05500417A (ja) * 1989-08-17 1993-01-28 マイクロバイオロジカル・リサーチ・オーソリティー 密度計
DE59100781D1 (de) * 1990-04-23 1994-02-10 Fleck Carl M Verfahren und vorrichtung zur reinigung von abgasen von partikeln.
US5844130A (en) * 1996-04-03 1998-12-01 Ssi Technologies Apparatus for maintaining a constant radial distance between a transmitting circuit and an antenna coil
US5717518A (en) 1996-07-22 1998-02-10 Kla Instruments Corporation Broad spectrum ultraviolet catadioptric imaging system
GB9908099D0 (en) * 1999-04-12 1999-06-02 Gay Geoffrey N W Air cleaning collection device
DE102010009846B4 (de) 2010-03-02 2015-10-01 K+S Aktiengesellschaft Verfahren zur elektrostatischen Trennung eine Mineralsalzgemisches
US10107784B2 (en) 2014-12-29 2018-10-23 Concentric Meter Corporation Electromagnetic transducer
US9752911B2 (en) 2014-12-29 2017-09-05 Concentric Meter Corporation Fluid parameter sensor and meter
US10126266B2 (en) 2014-12-29 2018-11-13 Concentric Meter Corporation Fluid parameter sensor and meter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1400684A (fr) * 1964-05-27 1965-05-28 Nippon Kuki Kogyo Kabushiki Ka Dépoussiéreur d'air électrostatique
US4010011A (en) * 1975-04-30 1977-03-01 The United States Of America As Represented By The Secretary Of The Army Electro-inertial air cleaner
DE2722560A1 (de) * 1976-06-08 1977-12-22 Akad Wissenschaften Ddr Verfahren und vorrichtung zur kontinuierlichen messung von gasdruecken
FR2504265A1 (fr) * 1981-04-15 1982-10-22 Detaint Jacques Dispositif de mesure de la pression d'un gaz
US4535633A (en) * 1983-06-29 1985-08-20 Veb Hochvakuum Dresden Method and apparatus for the protection of analyzers and other sensitive components from soiling and corrosion

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8500408A1 *

Also Published As

Publication number Publication date
DE3324478A1 (de) 1985-01-24
US4628739A (en) 1986-12-16
WO1985000408A1 (fr) 1985-01-31
JPS60501744A (ja) 1985-10-17
IT8421664A0 (it) 1984-06-29

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Legal Events

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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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17P Request for examination filed

Effective date: 19850212

AK Designated contracting states

Designated state(s): AT CH DE FR GB LI SE

STAA Information on the status of an ep patent application or granted ep patent

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18R Application refused

Effective date: 19870423

RIN1 Information on inventor provided before grant (corrected)

Inventor name: DOBLER, KLAUS

Inventor name: BLAICH, BERNHARD

Inventor name: ZRENNER, CHRISTIAN

Inventor name: KARR, DIETER