EP1087830A1 - Dispositif et procede pour le traitement de gaz en circulation, en particulier de gaz d'echappement - Google Patents

Dispositif et procede pour le traitement de gaz en circulation, en particulier de gaz d'echappement

Info

Publication number
EP1087830A1
EP1087830A1 EP00912643A EP00912643A EP1087830A1 EP 1087830 A1 EP1087830 A1 EP 1087830A1 EP 00912643 A EP00912643 A EP 00912643A EP 00912643 A EP00912643 A EP 00912643A EP 1087830 A1 EP1087830 A1 EP 1087830A1
Authority
EP
European Patent Office
Prior art keywords
gas
electrode
thickening
discharge
gases
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Withdrawn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
EP00912643A
Other languages
German (de)
English (en)
Inventor
Willi Neff
Klaus Pochner
Franz-Josef Trompeter
Jens Kamp
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.)
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
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 Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV filed Critical Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Publication of EP1087830A1 publication Critical patent/EP1087830A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes

Definitions

  • the invention relates to a device and a method for treating flowing gases, and in particular flowing exhaust gases, according to the preamble of patent claim 1.
  • the invention is used in all fields of technology in which flowing gases have to be subjected to aftertreatment to reduce pollutants, for example in automotive engineering, in power plants or waste incineration plants or where gases are to be converted into new substances by plasma chemistry, such as in the production of ozone from oxygen.
  • the present invention is an advantageous further development of DE 195 18 970 C1.
  • Another disadvantage of the thickening is that the gas flow is severely hampered by the discharge gap, which is only a few millimeters in size and which the electrodes form.
  • the increased flow resistance is disadvantageous for all of the applications mentioned and, for example in internal combustion engines, can lead to a backflow of exhaust gases and thus to a deterioration in engine performance. For this reason, it is desirable to dimension the discharge gap as large as possible.
  • the increase in the electrode spacing required thereby increases the voltage amplitude generated by the voltage source.
  • the higher expenditure for insulation and voltage generators speaks against this.
  • the object of the invention is to overcome the disadvantages of DE 195 18 970 C1 and to provide an exhaust gas reactor in which the exhaust gas flows through the volume occupied by the gas discharge as completely as possible.
  • Another task is to reduce the flow resistance of the discharge gap. The reduction in the flow resistance should take place without increasing the discharge gap.
  • the openings are made so that the exhaust gas can flow through the opening.
  • flowing gas is exposed to the discharge filaments.
  • the volume occupied by the gas discharge is almost completely flowed through by the exhaust gas and the cleaning effect is improved.
  • the volume covered by the discharge filaments is approximately doubled, and the cleaning effect increases accordingly by approximately 100%.
  • the thickenings may be desirable to provide only a portion of the thickenings with openings if the flow behavior in the respective application requires this.
  • One or more openings are possible per thickening.
  • the width of the openings is dimensioned such that the discharge filaments also ignite reliably via the path extended by this width.
  • the invention can also serve to use smaller voltage amplitudes than in a reactor according to the prior art.
  • the discharge gap can be reduced to such an extent that the cross-sectional area through which the gas flows and which is formed by the sum of the cross-sectional areas of the discharge gap and openings remains the same. This is particularly advantageous for the exhaust gas cleaning of internal combustion engines, in which case can advantageously be used with smaller voltages, so that cheaper and more compact voltage sources can be selected.
  • FIG. 1 shows an exhaust gas reactor according to DE 195 18 970 C1 with two planar electrodes (1) and (2), the upper electrode (1) being covered with a dielectric (3).
  • the lower electrode (2) has thickenings (4).
  • the thickenings are shaped so that there are no sharp tips or edges to avoid the transition to a corona discharge.
  • the gas flows almost exclusively in the area above the thickenings (4). This area is located in Fig. 1 above the horizontal dashed line (5). In the volume below this dashed line, and thus behind the thickening, there is only a negligible gas flow.
  • discharge voltages (7) shown in dashed lines are formed when the high voltage U is applied to the electrodes.
  • Fig. 2 shows a detailed view of a single thickening in the exhaust gas reactor according to DE 195 18 970 C1.
  • the ignition voltage is lowered, so that there are also discharges which take place over a longer distance (8).
  • the dashed line (5) There is thus a volume V1, where there are discharge filaments, but there is no gas flow. The volume occupied by the gas discharge is therefore only incompletely flowed through by the exhaust gas.
  • Fig. 3a The solution according to the invention is shown in Fig. 3a.
  • this electrode is now in the vicinity of the discharge gap Provide openings (9), ie perforated.
  • the openings are made so that the exhaust gas can flow through the openings.
  • the openings were made in the thickening with a laser beam in such a way that the borehole axes run largely parallel to the direction of flow.
  • FIG. 3b shows the openings (9), in the present case three openings, in a detailed view looking in the direction of flow. Due to the solution according to the invention, the ignition field strength remains the same due to the unchanged distance from the thickening to the smooth counter electrode. The flow resistance decreases, however, since gas can now additionally flow through the openings or openings.
  • the width of the openings is dimensioned such that the discharge filaments also ignite reliably via the path extended by this width. This creates an optimal overlap between the flowing gas and the volume swept by the barrier discharge.
  • the webs (10) and (11) should be as narrow as possible in order to cause only a slight flow resistance.
  • the electrical current to the horizontal web (10) i.e. the thickening area above the openings (9), and from there across the filaments of the barrier discharge to the opposite dielectric.
  • the mutual distance between the vertical webs (11) must be such that the horizontal web (10) is not deformed, for example by thermal expansion.
  • 3c shows a side view (gas flow from left to right) of a thickening (4) which is at least partially oriented obliquely to the counterelectrode (buckled thickening).
  • the fires are initially ignited by the shortest route, ie in the discharge gap (6a) on the web. Due to the decreasing ignition voltage, the subsequent ignition takes place with a longer path below the opening (9) laterally offset in the flow direction, ie a further discharge gap (6b) is formed. Due to the lateral offset, the discharge has a larger dielectric surface, so that the gas discharge absorbs even more power per thickening can than with a thickening without a kink. Depending on the choice of openings, at least two discharge gaps are created.
  • the smooth electrode (1) consists of a tube with insulation (3) drawn with dots.
  • the insulation consists of quartz glass or an aluminum oxide ceramic.
  • the thickenings (4) on the electrode (2) are metallic disks with openings (9).
  • the gas flows parallel to the cylinder axis through the discharge gap (6) and through the openings (9).
  • narrow webs (11) are arranged between the individual openings in the disks.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treating Waste Gases (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Abstract

L'invention a pour objet un dispositif et un procédé pour le traitement de gaz en circulation, en particulier de gaz d'échappement, et constitue un perfectionnement avantageux de DE 195 18 970 C1. Le dispositif comprend au moins une paire d'électrodes plates disposées l'une vis-à-vis de l'autre, de façon qu'elles forment entre elles un espace de décharge parcouru par les gaz. Pour chaque paire d'électrodes, au moins une électrode est recouverte d'un diélectrique sur la face tournée vers l'espace de décharge. En outre, au moins une électrode présente une ou plusieurs zones dans lesquelles cette électrode présente un renflement orienté vers l'espace de décharge, cependant qu'il est prévu dans ce renflement, au moins un orifice à travers lequel les gaz peuvent s'écouler. Le domaine d'application préféré concerne l'épuration des gaz d'échappement des moteurs à combustion interne des véhicules, ainsi que des gaz d'échappement des centrales ou des usines d'incinération.
EP00912643A 1999-03-25 2000-03-24 Dispositif et procede pour le traitement de gaz en circulation, en particulier de gaz d'echappement Withdrawn EP1087830A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19913614 1999-03-25
DE19913614A DE19913614C1 (de) 1999-03-25 1999-03-25 Vorrichtung und Verfahren zur Behandlung von strömenden Gasen, insbesondere von Abgasen
PCT/EP2000/002627 WO2000057992A1 (fr) 1999-03-25 2000-03-24 Dispositif et procede pour le traitement de gaz en circulation, en particulier de gaz d'echappement

Publications (1)

Publication Number Publication Date
EP1087830A1 true EP1087830A1 (fr) 2001-04-04

Family

ID=7902411

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00912643A Withdrawn EP1087830A1 (fr) 1999-03-25 2000-03-24 Dispositif et procede pour le traitement de gaz en circulation, en particulier de gaz d'echappement

Country Status (4)

Country Link
US (1) US6461409B1 (fr)
EP (1) EP1087830A1 (fr)
DE (1) DE19913614C1 (fr)
WO (1) WO2000057992A1 (fr)

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Publication number Priority date Publication date Assignee Title
US6635106B2 (en) * 2000-03-03 2003-10-21 Matsushita Seiko Co., Ltd. Dust collecting apparatus and air-conditioning apparatus
EP1436589A2 (fr) * 2001-10-09 2004-07-14 Robert Bosch Gmbh Procede de detection de particules dans un flux gazeux et detecteur utilise
US8053700B2 (en) * 2003-04-16 2011-11-08 Mks Instruments, Inc. Applicators and cooling systems for a plasma device
US6872909B2 (en) 2003-04-16 2005-03-29 Applied Science And Technology, Inc. Toroidal low-field reactive gas and plasma source having a dielectric vacuum vessel
JP4749118B2 (ja) * 2005-10-27 2011-08-17 新日本製鐵株式会社 静電分離方法および静電分離装置
ES2301415B1 (es) * 2006-12-11 2009-04-16 Bsh Electrodomesticos España, S.A. Dispositivo separador de particulas electrostaticas.
US7969096B2 (en) 2006-12-15 2011-06-28 Mks Instruments, Inc. Inductively-coupled plasma source
DE102010044252B4 (de) 2010-09-02 2014-03-27 Reinhausen Plasma Gmbh Vorrichtung und Verfahren zur Erzeugung einer Barriereentladung in einem Gasstrom
RU2546057C2 (ru) * 2013-12-09 2015-04-10 Александр Александрович Звонов Способ и технологическая линия по производству электричества

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US2978066A (en) * 1959-05-07 1961-04-04 Honeywell Regulator Co Gas cleaning apparatus
DE1810842A1 (de) * 1968-11-25 1970-06-11 Interelectric Ag Elektrofilter fuer Gase
US3814879A (en) * 1971-03-09 1974-06-04 Westinghouse Electric Corp Circuit interrupter with improved trap for removing particles from fluid insulating material
US3768258A (en) * 1971-05-13 1973-10-30 Consan Pacific Inc Polluting fume abatement apparatus
US3795605A (en) * 1972-06-16 1974-03-05 J Candor Method and apparatus for removing and/or separating particles from fluid containing the same
US4216000A (en) * 1977-04-18 1980-08-05 Air Pollution Systems, Inc. Resistive anode for corona discharge devices
US4277258A (en) * 1977-12-09 1981-07-07 F. L. Smidth & Co. Electrostatic precipitator and discharge electrode therefor
US4477268A (en) * 1981-03-26 1984-10-16 Kalt Charles G Multi-layered electrostatic particle collector electrodes
DE3414121A1 (de) 1984-04-14 1985-10-24 Brown, Boveri & Cie Ag, 6800 Mannheim Verfahren und vorrichtung zur reinigung von abgasen
EP0314811B1 (fr) * 1987-05-21 1994-03-30 Matsushita Electric Industrial Co., Ltd. Electrode collectrice de poussiere
EP0437849A1 (fr) * 1990-01-17 1991-07-24 Elex Ag Electrode émettrice dans un séparateur électrostatique de poussière
KR920004208B1 (ko) * 1990-06-12 1992-05-30 삼성전자주식회사 공기 청정기용 전기 집진장치
DE4317964C2 (de) * 1993-05-28 1996-04-25 Siemens Ag Vorrichtung zur plasmachemischen Bearbeitung von Schadstoffen und Materialien
US5582632A (en) * 1994-05-11 1996-12-10 Kimberly-Clark Corporation Corona-assisted electrostatic filtration apparatus and method
DE19518970C1 (de) * 1995-05-23 1996-11-21 Fraunhofer Ges Forschung Verfahren und Vorrichtung zur Behandlung von Abgas
DE19616197C2 (de) * 1996-04-23 1998-04-09 Fraunhofer Ges Forschung Verfahren zur Behandlung von Abgas
JP2001522302A (ja) 1997-04-28 2001-11-13 インスティトゥート フューア ニーダーテンペラトゥア−プラズマフュジーク エー．ファウ．アン デル エルンスト−モリッツ−アルント−ウニヴェルジテート グライフスヴァルト 燃焼工程からの排ガス中の有害物質を分離する方法及び装置

Non-Patent Citations (1)

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Title
See references of WO0057992A1 *

Also Published As

Publication number Publication date
DE19913614C1 (de) 2000-05-11
WO2000057992A1 (fr) 2000-10-05
US6461409B1 (en) 2002-10-08

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