WO1998048922B1 - Device and method for decomposing harmful substances contained in flue gas - Google Patents

Device and method for decomposing harmful substances contained in flue gas

Info

Publication number
WO1998048922B1
WO1998048922B1 PCT/EP1998/002394 EP9802394W WO9848922B1 WO 1998048922 B1 WO1998048922 B1 WO 1998048922B1 EP 9802394 W EP9802394 W EP 9802394W WO 9848922 B1 WO9848922 B1 WO 9848922B1
Authority
WO
WIPO (PCT)
Prior art keywords
decomposition
pollutants
combustion processes
exhaust gases
gas
Prior art date
Application number
PCT/EP1998/002394
Other languages
German (de)
French (fr)
Other versions
WO1998048922A1 (en
Filing date
Publication date
Priority claimed from DE19717890A external-priority patent/DE19717890C5/en
Priority claimed from DE1997117889 external-priority patent/DE19717889C2/en
Application filed filed Critical
Priority to DE59809089T priority Critical patent/DE59809089D1/en
Priority to JP54657398A priority patent/JP2001522302A/en
Priority to EP98922764A priority patent/EP0979135B8/en
Priority to US09/403,533 priority patent/US6517786B1/en
Publication of WO1998048922A1 publication Critical patent/WO1998048922A1/en
Publication of WO1998048922B1 publication Critical patent/WO1998048922B1/en

Links

Abstract

The invention relates to a decomposition device and method for toxic or soot-containing harmful substances. The suggested system comprises at least one processing station (5) based on dielectric obstruction discharge, with a device containing at least two electrodes, one of which is a porous and gas-permeable electrode (6). In order to decompose said toxic harmful substances, the flue gas is first introduced into at least one processing station (5), in which they are submitted to a plasma processing involving an appropriate alternate voltage supply (9), and from which said flue gas is let out through a porous electrode (6) into one or more gas tanks (7). In order to decompose the soot-containing harmful substances, the flue gas is introduced through one end of the processing station (5) formed by the two electrodes, the other end being closed, and through the porous electrode (6) which is gas-permeable but filters and holds back the soot particles.

Claims

15 15
GEÄNDERTE ANSPRÜCHECHANGED CLAIMS
[beim Internationalen Büro am 29 Oktober 98 (29.10.98) eingegangen; ursprüngliche Ansprüche 1-23 durch geänderte Ansprüche 1-11 ersetzt (2 Seiten)][received at the International Bureau on 29 October 98 (29.10.98); original claims 1-23 replaced by amended claims 1-11 (2 pages)]
1 Vorrichtung zur Zersetzung von Schadstoffen in Abgasen von Verbrennungsprozessen, bei der das Abgas durch mindestens einen nach dem Prinzip der dielektrisch behinderten Entladung arbeitenden, wenigstens zwei Elektroden aufweisenden, Behandlungsraum (5) geleitet wird, dadurch gekennzeichnet, daß eine Elektrode als eine elektrisch leitfahige gasdurchlässige poröse Elektrode (6) ausgebildet ist, die entweder selbst leitfahig ist oder aus einem porösen nichtleitfahigen Bestandteil (6a) und einem leitfahigen Bestandteil (6b) besteht und die längs der Stromungsrichtung des zu behandelnden Abgases angeordnet istA device for the decomposition of pollutants in exhaust gases of combustion processes, in which the exhaust gas is passed through at least one operating on the principle of dielectrically impeded discharge, at least two electrodes, treatment chamber (5), characterized in that an electrode as an electrically conductive gas-permeable porous electrode (6) is formed, which is either self-conductive or consists of a porous nichtleitfahigen component (6a) and a conductive component (6b) and which is arranged along the flow direction of the exhaust gas to be treated
2 Vorrichtung zur Zersetzung von Schadstoffen in Abgasen von Verbrennungsprozessen nach Anspruch 1 , dadurch gekennzeichnet, daß die poröse elektrisch leitfahige Elektrode (6) aus reaktionsverbundenem SiC bestehtA device for the decomposition of pollutants in exhaust gases of combustion processes according to claim 1, characterized in that the porous electrically conductive electrode (6) consists of reaction-bonded SiC
3 Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die poröse Elektrode ein Geflecht eines elektrisch leitenden Materials (6b) aufweist3 Apparatus according to claim 1, characterized in that the porous electrode comprises a mesh of an electrically conductive material (6b)
4 Vorrichtung zur Zersetzung von Schadstoffen in Abgasen von Verbrennungsprozessen nach Anspruch 1 , dadurch gekennzeichnet, daß die poröse Elektrode (6) mit einem Material infiltriert ist, das katalytische Eigenschaften aufweistA device for the decomposition of pollutants in exhaust gases of combustion processes according to claim 1, characterized in that the porous electrode (6) is infiltrated with a material having catalytic properties
5 Vorrichtung zur Zersetzung von Schadstoffen in Abgasen von Verbrennungsprozessen nach Anspruch 1 , dadurch gekennzeichnet, daß das Volumen des Gasraumes (7) großer als das des Behandlungsraumes (5) ist5 A device for the decomposition of pollutants in exhaust gases of combustion processes according to claim 1, characterized in that the volume of the gas space (7) is greater than that of the treatment chamber (5)
6 Vorrichtung zur Zersetzung von Schadstoffen in Abgasen von Verbrennungsprozessen nach Anspruch 1, dadurch gekennzeichnet, daß im abstromseitigen Gasraum (7) ein Unterdruck gegenüber dem Behandlungsraum (5) hergestellt wird6 A device for the decomposition of pollutants in exhaust gases of combustion processes according to claim 1, characterized in that in the downstream gas space (7), a negative pressure relative to the treatment chamber (5) is produced
7 Vorrichtung zur Zersetzung von Schadstoffen in Abgasen von Verbrennungsprozessen nach Anspruch 1, dadurch gekennzeichnet, daß nicht alle Flachenelemente der beiden Elektroden orthogonal zueinander stehen, so daß damit an einem Abschnitt des Behandlungsraumes (5) unterschiedliche Gasraumdicken ausgebildet sind 167 A device for the decomposition of pollutants in exhaust gases of combustion processes according to claim 1, characterized in that not all surface elements of the two electrodes are orthogonal to each other, so that thus at a portion of the treatment chamber (5) different gas space thicknesses are formed 16
8 Verfahren zur Zersetzung von giftigen Schadstoffen in Abgasen von Verbrennungsprozessen mit einer Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Abgas in mindestens einem Behandlungsraum (5) durch eine geeignete Wechselspannungsversorgung (9) einer Plasmabehandlung unterzogen wird und das Abgas durch eine poröse Elektrode (6) aus einem Gasraum (7) in den Behandlungsraum (5) einströmt und/oder aus dem Behandlungsraum (5) in einen Gasraum (7) weiterstromt8 method for the decomposition of toxic pollutants in exhaust gases of combustion processes with an apparatus according to claim 1, characterized in that the exhaust gas in at least one treatment chamber (5) by a suitable AC power supply (9) is subjected to a plasma treatment and the exhaust gas through a porous electrode ( 6) flows from a gas space (7) into the treatment space (5) and / or continues to flow from the treatment space (5) into a gas space (7)
9 Verfahren zur Zersetzung von rußhaltigen Schadstoffen in Abgasen von Verbrennungsprozessen mit einer Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Abgas durch mindestens einen Behandlungsraum (5) geleitet wird, in dem die Rußpartikel (1 1) durch mindestens eine poröse Elektrode aus dem Abgas ausgefiltert und durch ein Plasma zur Reaktion gebracht werden, wobei das Plasma in Abhängigkeit von der Panikelbeladung zu- oder abgeschaltet wird, so daß eine Mindestbeladung von Partikeln erhalten bleibt9 A method for the decomposition of sooty pollutants in exhaust gases of combustion processes with an apparatus according to claim 1, characterized in that the exhaust gas is passed through at least one treatment chamber (5), in which the soot particles (1 1) by at least one porous electrode from the exhaust gas filtered out and brought to a reaction by a plasma, wherein the plasma is switched on or off depending on the Panikelbeladung so that a minimum loading of particles is maintained
10 Verfahren zur Zersetzung von Schadstoffen in Abgasen von Verbrennungsprozessen nach Ansprüchen 8 und 9, dadurch gekennzeichnet, daß behandeltes Abgas von einem ersten Behandlungsraum (5) über eine poröse Elektrode in mindestens einen weiteren Behandlungsraum (5) strömt und dort durch ein Plasma nachbehandelt wird10. A process for the decomposition of pollutants in exhaust gases of combustion processes according to claims 8 and 9, characterized in that treated exhaust gas flows from a first treatment chamber (5) via a porous electrode in at least one further treatment chamber (5) and is post-treated there by a plasma
1 1 Verfahren zur Zersetzung von Schadstoffen in Abgasen von Verbrennungsprozessen nach den Ansprüchen 8 und 9, dadurch gekennzeichnet, daß Komponenten aus beigemischter Luft für die Reaktionen genutzt werden und/oder die Reaktionen durch thermische Mittel wie Kühlung und Aufheizung unterstutzt werden 1 1. A process for the decomposition of pollutants in exhaust gases of combustion processes according to claims 8 and 9, characterized in that components of admixed air f o r the reactions are used and / or the reactions are supported by thermal means such as cooling and heating
PCT/EP1998/002394 1997-04-28 1998-04-23 Device and method for decomposing harmful substances contained in flue gas WO1998048922A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE59809089T DE59809089D1 (en) 1997-04-28 1998-04-23 DEVICE AND METHOD FOR THE DECOMPOSITION OF POLLUTANTS IN EXHAUST GASES FROM COMBUSTION PROCESSES
JP54657398A JP2001522302A (en) 1997-04-28 1998-04-23 Method and apparatus for separating harmful substances in exhaust gas from combustion process
EP98922764A EP0979135B8 (en) 1997-04-28 1998-04-23 Device and method for decomposing harmful substances contained in flue gas
US09/403,533 US6517786B1 (en) 1997-04-28 1998-04-23 Device and method for decomposing harmful substances contained in flue gas

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19717890A DE19717890C5 (en) 1997-04-28 1997-04-28 Method and device for the plasma-assisted decomposition of soot in combustion exhaust gases
DE1997117889 DE19717889C2 (en) 1997-04-28 1997-04-28 Device and method for the decomposition of toxic pollutants in exhaust gases from combustion processes
DE19717889.8 1997-04-28
DE19717890.1 1997-04-28

Publications (2)

Publication Number Publication Date
WO1998048922A1 WO1998048922A1 (en) 1998-11-05
WO1998048922B1 true WO1998048922B1 (en) 1998-12-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/002394 WO1998048922A1 (en) 1997-04-28 1998-04-23 Device and method for decomposing harmful substances contained in flue gas

Country Status (5)

Country Link
US (1) US6517786B1 (en)
EP (1) EP0979135B8 (en)
JP (1) JP2001522302A (en)
DE (1) DE59809089D1 (en)
WO (1) WO1998048922A1 (en)

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