EP2198200B1 - Nachverbrennungsvorrichtung zum filtern und verringern von teilchenemissionen sowie optimieren der wärmeleistung und verfahren zum betrieb einer solchen vorrichtung - Google Patents

Nachverbrennungsvorrichtung zum filtern und verringern von teilchenemissionen sowie optimieren der wärmeleistung und verfahren zum betrieb einer solchen vorrichtung Download PDF

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Publication number
EP2198200B1
EP2198200B1 EP07819054A EP07819054A EP2198200B1 EP 2198200 B1 EP2198200 B1 EP 2198200B1 EP 07819054 A EP07819054 A EP 07819054A EP 07819054 A EP07819054 A EP 07819054A EP 2198200 B1 EP2198200 B1 EP 2198200B1
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Prior art keywords
post
combustion
stage
catalyst
burner
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EP07819054A
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English (en)
French (fr)
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EP2198200A1 (de
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Robert Dal Pra'
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
    • F23G5/14—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion
    • F23G5/16—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion in a separate combustion chamber
    • 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
    • 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
    • B03C3/025—Combinations of electrostatic separators, e.g. in parallel or in series, stacked separators or dry-wet separator combinations
    • 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
    • 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
    • B03C3/12—Plant or installations having external electricity supply dry type characterised by separation of ionising and collecting stations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • F23G7/07—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/10—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of field or garden waste or biomasses
    • 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
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
    • F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/005—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues using fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2217/00—Intercepting solids
    • F23J2217/10—Intercepting solids by filters
    • F23J2217/102—Intercepting solids by filters electrostatic

Definitions

  • the present finding concerns a post-combustion device, for filtering and reducing emission of particulate as well as optimizing thermal performance, to be used on biomass fuelled burners.
  • the heating appliance can be equipped with a chamber with a secondary airflow or a water coil which, upon contact with the combustion exhaust gases, transfers some of the heat from the gases mentioned beforehand to the transfer fluid, thus increasing the appliance's thermal performance (for example as described respectively in the 253.010 and VI2004A000049 Italian patents).
  • This patent aims at manufacturing a combustion heating appliance capable of guaranteeing both enhanced thermal performance and low pollution compared to corresponding parameters of similar products already known.
  • a device to be applied downstream a burner - to be found in wood, pellet, wood chips, oil seeds and generally biomass fuelled stoves/boilers - comprising at least one mechanical pre-filter (a cyclone filter), at least one smoke ionization chamber, at least one electrostatic collection filter (made of a cellular monolithic catalyst with an impregnated metal substrate), at least one oxygen addition intake to control post-combustion, at least one post-filtration electrostatic chamber, at least one heat exchanger, at least one suction device used to create depression along the entire gases route (burner - cyclone pre-filter - ioniser - collector/catalyst - electrostatic post-filter - heat exchanger).
  • a cyclone separator may be used for mechanical pre-filtration operations.
  • Such cyclone separator is used to remove heavy visible particles (ash for instance which could end up settling on the catalyst substrate and thus clogging it) from the smoke generated following normal combustion.
  • Such particles end up in a removable collection tray under the appliance.
  • smoke is channelled into the primary ionizing section, where there is an exhaust gases ionization chamber, made of a metal sheet mesh with a 10 kV electrostatically charged catalyzing substrate, to cause particulate polarisation.
  • the electrically charged gases are channelled into an electrostatic filtering collector, made of a catalyst with a previously treated and earthed metal substrate, operating as a post-burner through combustion of the CO (carbon monoxide) previously mixed with oxygen and of the particulate electrostatically collected and applied on the surface of the abovementioned substrate.
  • the catalyst serves as a collector in the electrostatic scrubbing process, collecting fine dusts while converting harmful substances - both to health and environment - usually produced by biomass combustion into harmless substances. This occurs through surface chemical reactions taking place onto the heated metal substrate previously coated with noble metals (such as platinum, palladium and rhodium) which cause oxidation of carbon monoxide and other unburned hydrocarbons, converting them into carbon dioxide and water alongside the reduction of nitrogen oxides and fine dusts, commonly referred to as PM 10 , (environmentally friendly outcome).
  • noble metals such as platinum, palladium and rhodium
  • a secondary electrostatic filter comprising a two-stage electrostatic chamber made of metal sheet with a treated substrate, made up of an ionising section and a collection section, can be arranged downstream the catalyst.
  • the electrostatic two-stage chamber mentioned beforehand collects the fine dusts (diameter below 1 ⁇ m) produced during the initial igniting stage of the burner. These fine dusts remain unburned after going through the previous post-combustion group, as this is still inefficient within that ignition period of time due to low temperatures at that stage.
  • the secondary electrostatic filter is disabled and its collection surface is cleaned up under the effect of the high temperature of the gases exiting from the post-burner.
  • the ideal performance of a bundle heat exchanger can be obtained only by positioning said exchanger after the particulate filtration system, thus allowing the scrubbing of fine dusts. Indeed, were said dusts still present during the thermal exchange stage, they disadvantageously would settle onto the internal walls of the exchanger, thus reducing its performance i.e. external thermal conduction.
  • a suction device is fixed at the end of the exhaust gas pipe where gases have already considerably cooled down.
  • Such suction device is used to create depression along the canal outlining the entire exhaust gas route, thus starting the suction operation directly from the combustion chamber of the heating appliance.
  • the entire system shall be fixed downstream the combustion chamber of the heating appliance. Basically, this is due to the fact that the system should collect burnt gases while they are still flames and at temperatures not below 300-350°C, the maximum value required to neutralise polluting gas substances through the catalyst.
  • the device 1 provided for by this finding operates in five stages: in the first stage, mechanical pre-filtration of coarse particulate occurs, as illustrated in the drawing at F1; ( fig. 1 ); in the second stage, oxygen regulated ionization and mixing occurs as illustrated in the drawing at F2; in the third stage, collection of fine dusts alongside conversion and post-combustion of gases occurs with electrostatic precipitation as illustrated in the drawing at F3; in the fourth stage, electrostatic post-filtration of fine particulate occurs as illustrated in the drawing at F4 and in the fifth stage, heat exchange with the external environment occurs as illustrated in the drawing at F5.
  • the exhaust gases find their way from the combustion chamber "C” into the mechanical separation filter through the pipe 2.
  • Said filter is made of a cyclone 3, which separates coarse particles, which in turn settle in a manually removable tray 4 beneath.
  • the combustion gas exits from the upper collector 5 of the cyclone 2 then it undergoes mechanical pre-filtration and addition of oxygen coming from an external source through an intake canal 6 equipped with an automatic gate valve 6.1.
  • the gas is channelled through an ionization chamber 8 supplied with a 10 kV positive electric charge, through which it is treated, charging the fine particles still present after the first mechanical filtration stage electrostatically.
  • particulate collection is performed in the third stage through the action of the metal substrate of a cellular catalyst 9 earthed with negative charge.
  • the substrate mentioned beforehand - treated using noble metals such as platinum, palladium and rhodium - serves to eliminate the unburned substances, cause oxidation of carbon monoxide and unburned hydrocarbons converting them into carbon monoxide and water, alongside reducing nitrogen oxide and PM 10 (environmentally friendly purpose).
  • Such two-stage electrostatic chamber 10 made of the same material as the previous cellular catalyst 9, consists of a first stage 10.1 which allows ionization of particles at 7,5 and 10 kV (positive pole) not collected by the catalyst mentioned beforehand, due to low temperature or due to temperature excursions under normal operation conditions (change of temperature/speed, on/off, lack of combustion).
  • the two-stage electrostatic chamber 10 also consists of a second stage 10.2 used to collect previously ionised particles, settling the rejected particles of the charged substrate at a 1/3 of the ionization voltage, on the earthed surface.
  • the gases are channelled into a high exchange surface tube bundle heat exchanger 12, where heat exchange occurs with environment air/air or air/water and where gas intake occurs from the top towards the bottom while the tube bundle encloses the entire post-combustion group (8,9,10) thus allowing to recover even the heat produced by the previously mentioned post combustion group surface coating, through the circulation of air to perform the heat exchange.
  • a suction motor 13 is fixed onto the heat exchanger 12 on the "S" openings. Such suction motor sucks cooled gases keeping the depression along the entire appliance at a constant level and releases said gases.
  • this device performs heat exchange and combustion exhaust gas purification operations occupying little space and with maximum performance.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Electrostatic Separation (AREA)
  • Incineration Of Waste (AREA)

Claims (15)

  1. NACHVERBRENNUNGSVORRICHTUNG ZUM FILTERN UND VERRINGERN DER REMISSION VON SCHÄDLICHEN PARTIKELN SOWIE ZUM OPTIMIEREN DER WÄRMELEISTUNG, zur Verwerdung in mit Biomasse, Holz, Pellets, Holzhackschnitzeln, Ölsamen und anderen ähnlichen Erzeugnissen befeuerten Brennern insbesondere für Geräte für den Hausgebrauch wie öfen und Kamine,
    wobei diese Zurrichtung (1) dadurch gekennzeichnet ist, das
    sie mindestens ein mechanisches Zyklonfilter (3), mindestens eine Primörionisierungskammer (8), mindestens einen katalytischen Nachverbrennungsabscheider oder einen geerdeten Katalysator (9), mindestens ein zweistufiges elektrostatisches Filter (10), mindestens einen Wärmetauscher (12) und mindestens eine Saugvorrichtung (13) umfasst, die dazu dient, einen Unterdruck längs des Weges der Gase zu erzeugen und diese Gase freizusetzen.
  2. VORRICHTUNG nach Anspruch 1 dadurch gekennzeichnet, dass sie als Nachbrenner dient, und dadurch, dass sie stromabwärts der Brennkammer "C" eines mit Biomasse befeuerten Heizgeräts angeordnet werden kann.
  3. VORRICHTUNG nach Anspruch 2, dadurch gekennzeichnet, dass sie als Filtrationssystem für Artikel dient, die beim Verbrennen von Biomasse erzeugt werden.
  4. VORRICHTUNG nach Anspruch 2, dadurch gekennzeichnet, dass der Katalysator (9) von der Art eines Metallmonolithen mit einem mit Edelmetallen wie Platin, Palladium oder Rhodium imprägnierten zellulären Träger ist, der die Oxydation von Kohlenmonoxid und unverbrannten Kohlenwasserstoffen bewirkt und sie in Kohlenstoffdioxid und Wasser umwandeln
  5. VORRICHTUNG nach Anspruch 3, dadurch gekennzeichnet, dass die Ionisierungskammer (8) eine elektrische Ladung von 10 kV hat und vor dem Katalysator (9) angeordnet ist.
  6. VORRICHTUNG nach Anspruch 3, dadurch gekennzeichnet, dass die Nachverbrennung im Katalysator durch Zugabe von Sauerstoff direkt von einer externen Quelle durch ein Rohr (6) optimiert wird, das mit einem selbstregelnden Ventil (6.1) ausgestattet ist.
  7. VORRICHTUNG nach Anspruch 1, dadurch gekennzeichnet, dass der geerdete Katalysator (1) als ein Kollektorelement für Feinstäube dient.
  8. VORRICHTUNG nach Anspruch 4, dadurch gekennzeichnet, dass die Primärionisierung das Ablagern der Partikel im Katalysatorträger auch dann bewirkt, wenn letzterer nicht die erforderlichen Betriebstemperaturen für die Nachverbrennung erreicht hat.
  9. VORRICHTUNG nach einem oder mehrere der vorergehenden Ansprüche, dadurch gekennzeichnet, dass das nach dem katalytischen Nachbrenner (9) ungeordnete zweistufige elektrostatische Filter (10) des zweistufigen Typs mit zwei Spannungen (10 kV) - 7,5 kV) ist und aus einer Ionisierungszone (10.1) und einer Kollektorzone (10.2) besteht, was das Austreten von Partikeln aus dem Katalysator (9) verhindert,
  10. VORRICHTUNG nach Anspruch 8, dadurch gekenntzeichnet, dass das zweistufige elektrostatische Filter (10) nach dem Katalysator (9) angeordnet ist und aus dem gleichen Material wie der vorgenannte Katalysator besteht und somit durch die Oberflächenverbrennung der auf dem Träger abgelagerten Partikel, die durch die hohe Temperatur des durch die vorhergehende Nachverbrennung erzeugten Gases ausgetöst wird, die ständige manuelle Reinigung des nach der Ionisierungszone (10.1) angeordneten Abscheiders vermieden wird.
  11. VORRICHTUNG nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das elektrostatische Filter (10) Filtiationsvoigänge ausführt und alle Staube und Gase zurückhält, die aufgrund einer mangelhaften Nachverbrennung, eines unregelmäßigen Betriebes des Heizgeräts oder von Fehlfunktionen wahrend der Vorgänge zum Ein- und Ausschalten des Brenners erzeugt werden,
  12. VORRICHTUNG nach einem oder mehreren der vorhergehenden Anspruch, dadurch gekennzeichnet, dass der Wärmetauscher (12) ein Rohrbündelwärmetauscher mit Gaseintritt von der Oberseite zum Boden hin ist und somit ermöglicht, dass sich die Hitze über die gesamte Oberfläche dieses Wärmetauschers verteilt.
  13. VORRICHTUNG nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Wärmetauscher (12) die Nachbrennerbaugruppe (8, 9, 10) einschließt und es somit ermöglicht, auch die von der Oberfiächenbeschichtung des Nachbrenner erzeugte Hitze durch die Luftzirkulation innerhalb dieses Nachbrenners zurückzugewinnen.
  14. VERFAHREN ZUM BETREIBEN EINER VORRICHTUNG nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekenntzeichnet, dass die ergindungsgemäße Vorrichtung (1) mit fünf Stufen arbeitet: einer ersten Stufe (F1), wo die machanische Vorfiltration von Grobpartikel erfolgt; einer zweiten Stufe (F2), wo die sauerstoffregulierte Ionisierung und das Mischen erfolgen, einer dritten Stufe (F3), wo das Auffangen der Feinstäube zusammen mit der Umwandlung und Nachverbrennung von Glasen mit elektrostatischer Abscheidung erfolgt; einer vierten Stufe (F4), wo die elektrostatische Nachfiltration der Feinpartikel erfolgt; einer fünften Stufe (F5), wo der Wärmeaustausch mit der äußeren Umgehung erfolgt.
  15. HEIZGERÄT wie ein mit Holz, Pellets, Holzhockschnitzeln, Ölsamen und allgemein Biomasse befeuerter Ofen/Brenner, dadurch gekennzeichnet, dass es mit einer energiesparenden/umweltfreundlichen Vorrichtung (1) ausgestattet ist, die nach einem oder mehreren der Ansprüche 1 bis 13 ausgeführt ist.
EP07819054A 2007-10-17 2007-10-17 Nachverbrennungsvorrichtung zum filtern und verringern von teilchenemissionen sowie optimieren der wärmeleistung und verfahren zum betrieb einer solchen vorrichtung Not-in-force EP2198200B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/008986 WO2009049647A1 (en) 2007-10-17 2007-10-17 Post-combustion device, for filtering and reducing emission of particulate as well as optimizing thermal performance

Publications (2)

Publication Number Publication Date
EP2198200A1 EP2198200A1 (de) 2010-06-23
EP2198200B1 true EP2198200B1 (de) 2012-06-27

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EP07819054A Not-in-force EP2198200B1 (de) 2007-10-17 2007-10-17 Nachverbrennungsvorrichtung zum filtern und verringern von teilchenemissionen sowie optimieren der wärmeleistung und verfahren zum betrieb einer solchen vorrichtung

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EP (1) EP2198200B1 (de)
CA (1) CA2704157A1 (de)
WO (1) WO2009049647A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT515897B1 (de) * 2014-04-03 2016-03-15 Gilles En Und Umwelttechnik Gmbh & Co Kg Heizkessel

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3331545A1 (de) 1983-08-13 1985-02-28 Ferdinand Lentjes, Dampfkessel- und Maschinenbau, 4000 Düsseldorf Verfahren und anlage zum vermindern der schadstoffemission in rauchgasen von feuerungsanlagen
DE3601378A1 (de) * 1986-01-18 1987-07-23 Degussa Verfahren zur reinigung von oxide des stickstoffs und schwefels enthaltenden abgasen aus verbrennungsanlagen
US5233934A (en) * 1992-08-20 1993-08-10 Wahlco Environmental Systems, Inc. Control of NOx reduction in flue gas flows
DE102005023580A1 (de) * 2005-05-18 2006-11-23 Fev Motorentechnik Gmbh Wärmeerzeuger
ITPD20050281A1 (it) 2005-09-28 2007-03-29 Nonox Ltd Metodo e dispositivo per abbattere le componenti inquinanti presenti nei fumi di scarico di un termo-generatore a combustione

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