EP0203928A1 - Installation d'epuration de gaz - Google Patents

Installation d'epuration de gaz

Info

Publication number
EP0203928A1
EP0203928A1 EP85904235A EP85904235A EP0203928A1 EP 0203928 A1 EP0203928 A1 EP 0203928A1 EP 85904235 A EP85904235 A EP 85904235A EP 85904235 A EP85904235 A EP 85904235A EP 0203928 A1 EP0203928 A1 EP 0203928A1
Authority
EP
European Patent Office
Prior art keywords
electrodes
housing
particles
gases
coagulator
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Withdrawn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
EP85904235A
Other languages
German (de)
English (en)
Inventor
Ilan Brauer
Gerhard BRÜGGEN
Manfred Gaugler
Dieter Karr
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 EP0203928A1 publication Critical patent/EP0203928A1/fr
Withdrawn legal-status Critical Current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
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/04—Plant or installations having external electricity supply dry type
    • B03C3/09—Plant or installations having external electricity supply dry type characterised by presence of stationary flat electrodes arranged with their flat surfaces at right angles to the gas stream
    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0892—Electric or magnetic treatment, e.g. dissociation of noxious components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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 for cleaning gases according to the preamble of the main claim, as it has already become known from DE-OS 32 38 793.8.
  • the device described there is designed such that hollow cylindrical or flat electrodes are arranged in the flow direction of the gases to be cleaned. This means that a relatively large volume is required for the device in order to effect sufficient coagulation of the particles for the subsequent mechanical separation.
  • the electrodes are designed as disk-shaped sheets, which deflect the gas flow and thereby considerably lengthen the path of the gases and increase the coagulation rate.
  • an arrangement has proven to be expedient in which the electrodes at high voltage potential are mounted on a common carrier, while the electrodes at ground potential are attached to a housing wall.
  • the number of bushings for the high voltage to be insulated from the housing is limited to one or possibly two places, which further simplifies the structural design of the device.
  • the ground electrodes fastened in the housing are provided with a slot for the carrier to pass through.
  • Another advantageous design of the two electrode groups can be designed in such a way that the high-voltage electrodes and the ground electrodes are each fastened to a disc end on a common carrier or to the housing wall, so that the electrode groups are pushed into one another when the device is assembled without a threading slot or the like can.
  • arrows 10 indicate a gas flow which, when entering the device, is loaded with the finely divided particles to be separated via a nozzle 11.
  • the gas stream 10 leaves the part of the device according to the invention which is of interest here via a connecting piece 12 to a centrifugal separator 18, from which a cleaned gas stream 19a on the one hand and the separated particles 19b on the other hand emerge.
  • disc-shaped electrodes 21 which are at high voltage potential are electrically and mechanically fastened on the carrier 16.
  • Figure 2 shows the design of the high-voltage electrodes 21 from a wire mesh 25 which is braided from individual wires 26 and has a stiffening edge 27.
  • the electrodes 22, which are at ground potential, also consist of a corresponding wire mesh with a similar mesh and essentially the same dimensions.
  • the carrier 16 on which the high-voltage electrodes 21 are held can be seen in the middle of the wire grid 25.
  • the same flow rate and a large active electrode area are achieved in the entire coagulator area.
  • the latter causes particles with Store a sufficiently high dielectric constant in the electric field on the metallic electrodes 21 and 22 and grow together to form larger agglomerates if the flow velocity within the arrangement does not exceed a predetermined value of, for example, less than 1 m / s.
  • a dielectric constant of approx. 100 was measured for soot particles in the exhaust gas of diesel engines. If the particles, which become dipoles due to the electric field, are close to the charged electrode surface 21 or 22, they experience an acceleration towards the surface because they are attracted to the surface due to the opposite polarity of the dipoles.
  • Soot particles predominantly have rod-like geometries. They are therefore particularly easy to align in the electrical field and are therefore very suitable for the intended, temporary attachment process to the electrodes.
  • adhesive forces hold the particle at one end of the rod. There is some charge equalization because the carbon of the soot particles is semiconducting.
  • the free end of the individual attached particle or the free end of the attached agglomerate has the same charge as the electrode surface. The repulsive effect due to the electrical charges of the same name is canceled out by adhesive forces.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Toxicology (AREA)
  • Electrostatic Separation (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

Installation pour débarasser des gaz de particules ou gouttelettes notamment pour des gaz d'échappement lors de la combustion de carburants d'origine fossile spécialement pour des moteurs diesel. L'installation contient un dispositif coagulateur avec des électrodes haute tension (21, 22) dans lequel les petites particules sont transformées en dipôles par polarisation ou par influence et forment des agglomérats de plus grande taille. Ainsi, l'efficacité d'un séparateur (18) mécanique agencé à la suite du parcours des gaz est augmentée. Les électrodes (21, 22) sont aménagées dans une enceinte (13) du coagulateur perpendiculairement au courant gazeux (10). De cette façon l'efficacité de l'installation avec un volume donné est sensiblement améliorée.
EP85904235A 1984-12-13 1985-08-31 Installation d'epuration de gaz Withdrawn EP0203928A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3445406 1984-12-13
DE19843445406 DE3445406A1 (de) 1984-12-13 1984-12-13 Vorrichtung zum reinigen von gasen

Publications (1)

Publication Number Publication Date
EP0203928A1 true EP0203928A1 (fr) 1986-12-10

Family

ID=6252630

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85904235A Withdrawn EP0203928A1 (fr) 1984-12-13 1985-08-31 Installation d'epuration de gaz

Country Status (3)

Country Link
EP (1) EP0203928A1 (fr)
DE (1) DE3445406A1 (fr)
WO (1) WO1986003552A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9407861U1 (de) * 1994-05-11 1995-10-19 Siemens Ag Vorrichtung zur Entgiftung von Abgasen aus mobilen Anlagen
CN113356966B (zh) * 2021-06-17 2023-05-26 东风小康汽车有限公司重庆分公司 一种汽车尾气颗粒处理器及尾气处理装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE322188C (de) * 1918-12-05 1920-06-22 Siemens Schuckertwerke G M B H Elektrische Anlage zur Reinigung von Gasen
FR834510A (fr) * 1937-07-27 1938-11-23 Dispositif pour la suppression des fumées d'échappement des automobiles, locomotives et autres appareils analogues
JPS57186012A (en) * 1981-05-13 1982-11-16 Fuji Electric Corp Res & Dev Ltd Exhaust gas purifier for internal combustion engine
DE3141156A1 (de) * 1981-10-16 1983-04-28 Robert Bosch Gmbh, 7000 Stuttgart Verfahren und vorrichtung zum entfernen von festen bestandteilen und aerosolen, insbesondere von russbestandteilen aus dem abgas von brennkraftmaschinen
JPS59145314A (ja) * 1983-02-04 1984-08-20 Mitsubishi Motors Corp デイ−ゼルパテイキユレ−ト補集装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8603552A1 *

Also Published As

Publication number Publication date
DE3445406A1 (de) 1986-06-19
WO1986003552A1 (fr) 1986-06-19

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Effective date: 19861118

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Inventor name: BRAUER, ILAN

Inventor name: GAUGLER, MANFRED

Inventor name: KARR, DIETER

Inventor name: BRUEGGEN, GERHARD