EP0529474A2 - Device for generating heat by catalytic combustion - Google Patents

Device for generating heat by catalytic combustion Download PDF

Info

Publication number
EP0529474A2
EP0529474A2 EP92114039A EP92114039A EP0529474A2 EP 0529474 A2 EP0529474 A2 EP 0529474A2 EP 92114039 A EP92114039 A EP 92114039A EP 92114039 A EP92114039 A EP 92114039A EP 0529474 A2 EP0529474 A2 EP 0529474A2
Authority
EP
European Patent Office
Prior art keywords
fuel
exhaust gas
mixer
catalytic combustion
air
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Withdrawn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
EP92114039A
Other languages
German (de)
French (fr)
Other versions
EP0529474A3 (en
Inventor
Hans Dr. Wettstein
Vitor Dr. Scherer
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.)
ABB Patent GmbH
Original Assignee
ABB Patent 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 ABB Patent GmbH filed Critical ABB Patent GmbH
Publication of EP0529474A2 publication Critical patent/EP0529474A2/en
Publication of EP0529474A3 publication Critical patent/EP0529474A3/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C13/00—Apparatus in which combustion takes place in the presence of catalytic material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00—Feeding or distributing other fuel to combustion apparatus
    • F23K5/002—Gaseous fuel
    • F23K5/007—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00—Feeding or distributing other fuel to combustion apparatus
    • F23K5/02—Liquid fuel
    • F23K5/14—Details thereof
    • F23K5/20—Preheating devices

Definitions

  • the invention relates to a device for generating heat by catalytic combustion of a gaseous or liquid fuel.
  • Such devices can e.g. as heating systems in buildings, in particular for heating systems with an output of a few 100 kW.
  • pages 370 to 374 describes the catalytic combustion of hydrogen and measures are given to avoid self-ignition, namely a premix burner with a catalytic heater, the catalyst layer temperature of which is below the point at each point Self-ignition temperature of hydrogen is, as well as a catalyst with a damped temperature dependence of the sales performance, for which a special catalyst structure is required.
  • self-ignition namely a premix burner with a catalytic heater, the catalyst layer temperature of which is below the point at each point Self-ignition temperature of hydrogen is, as well as a catalyst with a damped temperature dependence of the sales performance, for which a special catalyst structure is required.
  • the aforementioned premixing of the fuel gas with air and preheating the mixture is proposed.
  • the invention has for its object to provide a device for heat generation by catalytic combustion, in which self-ignition of a fuel-air with little effort in facilities or substances Mixture is avoided and good, low-emission combustion is also achieved.
  • a device for generating heat by catalytic combustion of a gaseous one or liquid fuel in which a fuel / air mixer is connected upstream of a catalytic combustion chamber and a heat exchanger for heat extraction is connected downstream, a fuel / exhaust gas mixer being arranged in front of the fuel / air mixer and receiving part of the exhaust gas from the device and means for the controlled heating of the fuel-exhaust gas-air mixture are provided.
  • the proposed exhaust gas recirculation for admixing the exhaust gas as an inert gas to the fuel in a fuel / exhaust gas mixer advantageously reduces the ignitability of the mixture.
  • the combustion temperature is lower than that of conventional devices and therefore also the NO x emission.
  • the mixture supplied must be preheated. This can be done for example by electrical heating or with the help of a surface heat exchanger through the hot water generated by the overall device. It is also possible to arrange a surface heat exchanger and to use hot flue gas to preheat the fuel / air mixture.
  • part of the exhaust gases is returned as hot flue gas from the burner outlet to the fuel / exhaust gas mixer, which makes it possible to preheat the fuel-air mixture without a surface heat exchanger and also to vaporize a liquid fuel.
  • a first mixing chamber referred to as fuel / exhaust gas mixer 1 is fuel B, e.g. Natural gas.
  • the fuel B is mixed with cold exhaust gas A, which is returned from the outlet of the overall device with a second return line 6, thereby reducing the risk of auto-ignition.
  • hot flue gas R is also returned from the outlet of a catalytic burner 3 to the fuel / exhaust gas mixer 1 via a first return line 5.
  • Means for controlling and regulating the mass flows of the two exhaust gas flows are not shown in order to achieve a desired temperature of the mixture entering the burner 3.
  • a fuel / air mixer 2 is arranged as a second mixing chamber, to which air L is supplied.
  • Required Means for regulating the air supply to set a certain lambda value are not shown.
  • a burner 3 is followed by a heat exchanger 4, with the aid of which heat is transferred from the hot flue gas R to a water circuit W.

Abstract

The invention relates to a device for generating heat by catalytic combustion, e.g. in a heating installation. To achieve improvements as regards a reduction in the NOx emissions and the risk of spontaneous ignition of a fuel/air mixture, the invention proposes that some of the exhaust gas be added to the fuel. By recirculating some of the hot exhaust gas from the burner outlet to a fuel/exhaust gas mixer (1), it is possible to achieve preheating of the gas mixture. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Einrichtung zur Wärmeerzeugung durch katalytische Verbrennung eines gasförmigen oder flüssigen Brennstoffs.The invention relates to a device for generating heat by catalytic combustion of a gaseous or liquid fuel.

Solche Einrichtungen können z.B. als Heizanlagen in Gebäuden, insbesondere für Heizanlagen mit einer Leistung von einigen 100 kW Anwendung finden.Such devices can e.g. as heating systems in buildings, in particular for heating systems with an output of a few 100 kW.

Konventionelle Brenner verursachen thermische NOx-Emissionen von etwa 150 mg/m³. Es ist aus Joos, L., Stand der Nox-Emissionen und der Minderungsmaßnahmen bei Gasfeuerungen im HuK-Bereich, Gaswärme international, Bd. 35, 4, 1986, Seiten 187 bis 195 bekannt, daß durch Verwendung eines katalytischen Brenners eine deutliche NOx-Reduktion, nämlich um etwa 95% erzielt werden kann. Allerdings besteht bei katalytischen Brennern die Gefahr, daß sich das vor dem Eintritt in den Brennerraum hergestellte Brennstoff-Luft-Gemisch selbst entzündet. Eine erforderliche Vorheizung des Brennstoff-Luft-Gemisches auf etwa 300 bis 500°C bzw. ein Verdampfen von flüssigem Brennstoffen verursacht apparativen Zusatzaufwand. So ist z.B. in BWK, Bd. 39 (1987), Nr. 7/8, Seiten 370 bis 374 die katalytische Verbrennung von Wasserstoff beschrieben und es sind Maßnahmen zur Vermeidung einer Selbstentzündung angegeben, nämlich ein Vormischbrenner mit einem katalytischen Heizer, dessen Katalysatorschicht-Temperatur an jedem Punkt unter der Selbstentzündungstemperatur von Wasserstoff liegt, sowie ein Katalysator mit gedämpfter Temperaturabhängigkeit der Umsatzleistung, wozu eine besondere Katalysatorstruktur erforderlich ist. Für Hochtemperaturbrenner wird die erwähnte Vormischung des Brenngases mit Luft und Vorheizung des Gemisches vorgeschlagen.Conventional burners cause thermal NO x emissions of around 150 mg / m³. It is known from Joos, L., status of the No x emissions and the reduction measures for gas firing in the HuK area, Gaswärme international, Vol. 35, 4, 1986, pages 187 to 195 that by using a catalytic burner a clear NO x reduction, namely can be achieved by about 95%. However, with catalytic burners there is a risk that the fuel-air mixture produced before entering the burner chamber will ignite itself. A necessary preheating of the fuel-air mixture to about 300 to 500 ° C or an evaporation of liquid fuels causes additional equipment expenditure. For example, in BWK, Vol. 39 (1987), No. 7/8, pages 370 to 374 describes the catalytic combustion of hydrogen and measures are given to avoid self-ignition, namely a premix burner with a catalytic heater, the catalyst layer temperature of which is below the point at each point Self-ignition temperature of hydrogen is, as well as a catalyst with a damped temperature dependence of the sales performance, for which a special catalyst structure is required. For high-temperature burners, the aforementioned premixing of the fuel gas with air and preheating the mixture is proposed.

Aus der DE-AS 10 25 095 ist ein Betriebsverfahren für einen Kessel zur Dampferzeugung bekannt, der Partikel eines Oxidationskatalysators enthält, die durch eine Brennstoff- und Luftzufuhr aufgewirbelt werden. Ein Teil der zugeführten Luft kann vorgeheizt sein. Mit diesen Maßnahmen soll ein guter Wärmeübergang von der Flamme auf das Arbeitsmittel erzielt werden. Maßnahmen zur Verhinderung einer Selbstentzündung des Brennstoff-Luft-Gemisches sind dort nicht angesprochen.From DE-AS 10 25 095 an operating method for a boiler for steam generation is known, which contains particles of an oxidation catalyst, which are whirled up by a fuel and air supply. Some of the air supplied can be preheated. These measures are intended to achieve good heat transfer from the flame to the working fluid. Measures to prevent spontaneous combustion of the fuel-air mixture are not addressed there.

Ausgehend von dem Stand der Technik, der oben anhand der Veröffentlichung in der Zeitschrift BWK beschrieben wurde, liegt der Erfindung die Aufgabe zugrunde, eine Einrichtung zur Wärmeerzeugung durch katalytische Verbrennung anzugeben, bei der mit geringem Aufwand an Einrichtungen oder Stoffen eine Selbstentzündung eines Brennstoff-Luft-Gemisches vermieden ist und außerdem eine gute und emissionsarme Verbrennung erzielt wird.Based on the prior art, which was described above with reference to the publication in the magazine BWK, the invention has for its object to provide a device for heat generation by catalytic combustion, in which self-ignition of a fuel-air with little effort in facilities or substances Mixture is avoided and good, low-emission combustion is also achieved.

Diese Aufgabe wird gelöst durch eine Einrichtung zur Wärmeerzeugung durch katalytische Verbrennung eines gasförmigen oder flüssigen Brennstoffs, bei der einer katalytischen Brennkammer ein Brennstoff/Luft-Mischer vorgeschaltet und ein Wärmetauscher zur Wärmeauskopplung nachgeschaltet ist, wobei vor dem Brennstoff/Luft-Mischer ein Brennstoff/Abgas-Mischer angeordnet ist, dem ein Teil des Abgases der Einrichtung zugeführt ist und wobei Mittel zur geregelten Beheizung des Brennstoff-Abgas-Luftgemisches vorhanden sind.This object is achieved by a device for generating heat by catalytic combustion of a gaseous one or liquid fuel, in which a fuel / air mixer is connected upstream of a catalytic combustion chamber and a heat exchanger for heat extraction is connected downstream, a fuel / exhaust gas mixer being arranged in front of the fuel / air mixer and receiving part of the exhaust gas from the device and means for the controlled heating of the fuel-exhaust gas-air mixture are provided.

Die vorgeschlagene Abgasrückführung zur Zumischung des Abgases als Inertgas zum Brennstoff in einem Brennstoff/Abgas-Mischer setzt vorteilhaft die Zündfähigkeit des Gemisches herab. Da außerdem der Heizwert des Gasgemisches durch die Abgaszumischung verringert wird, ist die Verbrennungstemperatur niedriger als bei konventionellen Einrichtungen und dadurch auch die NOx-Emission.The proposed exhaust gas recirculation for admixing the exhaust gas as an inert gas to the fuel in a fuel / exhaust gas mixer advantageously reduces the ignitability of the mixture. In addition, since the calorific value of the gas mixture is reduced by the exhaust gas admixture, the combustion temperature is lower than that of conventional devices and therefore also the NO x emission.

Damit der katalytische Brenner arbeitet, muß eine Vorheizung des zugeführten Gemisches erfolgen. Dies kann beispielsweise durch elektrische Beheizung oder mit Hilfe eines Oberflächen-Wärmetauschers durch das von der Gesamteinrichtung erzeugte Heißwasser erfolgen. Es ist auch möglich, einen Oberflächen-Wärmetauscher anzuordnen und heißes Rauchgas zur Vorheizung des Brennstoff/Luft-Gemisches zu nutzen.In order for the catalytic burner to work, the mixture supplied must be preheated. This can be done for example by electrical heating or with the help of a surface heat exchanger through the hot water generated by the overall device. It is also possible to arrange a surface heat exchanger and to use hot flue gas to preheat the fuel / air mixture.

Nach einer vorteilhaften Ausgestaltung wird ein Teil der Abgase als heißes Rauchgas vom Brennerausgang auf den Brennstoff/Abgas-Mischer zurückgeführt, wodurch die Vorwärmung des Brennstoff-Luft-Gemisches ohne Oberflächen-Wärmetauscher möglich ist und auch ein Verdampfen eines flüssigen Brennstoffs möglich ist.According to an advantageous embodiment, part of the exhaust gases is returned as hot flue gas from the burner outlet to the fuel / exhaust gas mixer, which makes it possible to preheat the fuel-air mixture without a surface heat exchanger and also to vaporize a liquid fuel.

Eine bevorzugte Anordnung ist in der Zeichnung dargestellt und nachstehend beschrieben.A preferred arrangement is shown in the drawing and described below.

Einer als Brennstoff/Abgas-Mischer 1 bezeichneten ersten Mischkammer ist Brennstoff B, z.B. Erdgas, zugeführt. In dem Brennstoff/Abgas-Mischer 1 wird der Brennstoff B mit kaltem Abgas A gemischt, das vom Ausgang der Gesamteinrichtung mit einer zweiten Rückführleitung 6 zurückgeführt ist, wodurch die Selbstzündgefahr gemindert ist. Zur Vorwärmung des Brennstoffs B wird außerdem über eine erste Rückführleitung 5 heißes Rauchgas R vom Ausgang eines katalytischen Brenners 3 auf den Brennstoff/Abgas-Mischer 1 zurückgeführt. Nicht dargestellt sind Mittel zur Steuerung und Regelung der Massenströme der beiden Abgasströme um eine gewünschte Temperatur des am Brenner 3 eintretenden Gemisches zu erzielen.A first mixing chamber referred to as fuel / exhaust gas mixer 1 is fuel B, e.g. Natural gas. In the fuel / exhaust gas mixer 1, the fuel B is mixed with cold exhaust gas A, which is returned from the outlet of the overall device with a second return line 6, thereby reducing the risk of auto-ignition. For preheating the fuel B, hot flue gas R is also returned from the outlet of a catalytic burner 3 to the fuel / exhaust gas mixer 1 via a first return line 5. Means for controlling and regulating the mass flows of the two exhaust gas flows are not shown in order to achieve a desired temperature of the mixture entering the burner 3.

Zwischen dem Brennstoff/Abgas-Mischer 1 und dem Brenner 3 ist ein Brennstoff/Luft-Mischer 2 als zweite Mischkammer angeordnet, der Luft L zugeführt ist. Erforderliche Mittel zur Regelung der Luftzufuhr zur Einstellung eines bestimmten Lambda-Wertes sind nicht dargestellt.Between the fuel / exhaust gas mixer 1 and the burner 3, a fuel / air mixer 2 is arranged as a second mixing chamber, to which air L is supplied. Required Means for regulating the air supply to set a certain lambda value are not shown.

Dem Brenner 3 ist ein Wärmetauscher 4 nachgeschaltet, mit dessen Hilfe Wärme vom heißen Rauchgas R auf einen Wasserkreislauf W übertragen wird.A burner 3 is followed by a heat exchanger 4, with the aid of which heat is transferred from the hot flue gas R to a water circuit W.

Claims (2)

Einrichtung zur Wärmeerzeugung durch katalytische Verbrennung eines gasförmigen oder flüssigen Brennstoffs, bei der einer katalytischen Brennkammer ein Brennstoff/Luft-Mischer vorgeschaltet und ein Wärmetauscher zur Wärmeauskopplung nachgeschaltet ist, dadurch gekennzeichnet, daß vor dem Brennstoff/Luft-Mischer ein Brennstoff/Abgas-Mischer angeordnet ist, dem ein Teil des Abgases der Einrichtung zugeführt ist und daß Mittel zur geregelten Beheizung des Brennstoff-Abgas-Luftgemisches vorhanden sind.Device for generating heat by catalytic combustion of a gaseous or liquid fuel, in which a fuel / air mixer is connected upstream of a catalytic combustion chamber and a heat exchanger for heat extraction is connected downstream, characterized in that a fuel / exhaust gas mixer is arranged in front of the fuel / air mixer is to which a part of the exhaust gas of the device is supplied and that means for the controlled heating of the fuel-exhaust gas-air mixture are present. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß ein erster Teil des Abgases am Ausgang der Brennkammer (3) abgegriffen und über eine erste Rückführleitung (5) dem Brennstoff/Abgas-Mischer (1) zur Beheizung des Brennstoff-Abgas-Luftgemisches zugeführt ist und daß ein zweiter Teil des Abgases am Ausgang des Wärmetauschers (4) abgegriffen und über eine zweite Rückführleitung (6) dem Brennstoff/Abgas-Mischer (1) zugeführt ist, wobei Mittel vorhanden sind zur Regelung der Massenströme der beiden Abgasrückführungen, um eine vorgegebene Temperatur des Brennstoff-Abgas-Luftgemisches einzustellen.Device according to claim 1, characterized in that a first part of the exhaust gas is tapped at the outlet of the combustion chamber (3) and fed to the fuel / exhaust gas mixer (1) for heating the fuel / exhaust gas / air mixture via a first return line (5) and that a second part of the exhaust gas is tapped at the outlet of the heat exchanger (4) and fed to the fuel / exhaust gas mixer (1) via a second return line (6), means being provided for regulating the mass flows of the two exhaust gas recirculations by a predetermined temperature of the fuel-exhaust air mixture.
EP19920114039 1991-08-22 1992-08-18 Device for generating heat by catalytic combustion Withdrawn EP0529474A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4127883 1991-08-22
DE19914127883 DE4127883A1 (en) 1991-08-22 1991-08-22 DEVICE FOR HEAT GENERATION BY CATALYTIC COMBUSTION

Publications (2)

Publication Number Publication Date
EP0529474A2 true EP0529474A2 (en) 1993-03-03
EP0529474A3 EP0529474A3 (en) 1993-05-26

Family

ID=6438904

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920114039 Withdrawn EP0529474A3 (en) 1991-08-22 1992-08-18 Device for generating heat by catalytic combustion

Country Status (3)

Country Link
EP (1) EP0529474A3 (en)
JP (1) JPH05203109A (en)
DE (1) DE4127883A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010015214A2 (en) * 2008-08-04 2010-02-11 Ewe Aktiengesellschaft Method for continuously conditioning gas, preferably natural gas
US8500831B2 (en) 2008-08-04 2013-08-06 Ewe Gasspeicher Gmbh Device for continuously conditioning fed-out natural gas
US8607820B2 (en) 2008-08-04 2013-12-17 Ewe Gasspeicher Gmbh Device for continuously mixing fed-out natural gas with oxygen to produce a burnable gas for heating the pressurized natural gas before or after the relaxation thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4197701A (en) * 1975-12-29 1980-04-15 Engelhard Minerals & Chemicals Corporation Method and apparatus for combusting carbonaceous fuel
JPS57210205A (en) * 1981-06-22 1982-12-23 Central Res Inst Of Electric Power Ind Manufacture of inert gas through catalytic combustion
DE3428551A1 (en) * 1984-08-02 1986-02-13 Siemens AG, 1000 Berlin und 8000 München Process for operating a two-stage gasifying burner
US4995807A (en) * 1989-03-20 1991-02-26 Bryan Steam Corporation Flue gas recirculation system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE554664C (en) * 1930-03-30 1932-07-14 Cornelius Wolfgang Stort Dipl Procedure to avoid the flashback of the flame in burners with separate mixing and combustion space for gaseous, vaporized, liquid or dust-like fuels
DE1025092B (en) * 1954-11-19 1958-02-27 Combustion Eng Operating procedures for boilers to generate and / or superheat steam
US3558249A (en) * 1969-05-13 1971-01-26 Electric Furnace Co Method and application for preventing flashback in premix gas burner systems
US3760776A (en) * 1971-12-16 1973-09-25 Babcock & Wilcox Co A system for controlling the injection of an inert gas into the air supplied a burner to inhibit the formation of no{11

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4197701A (en) * 1975-12-29 1980-04-15 Engelhard Minerals & Chemicals Corporation Method and apparatus for combusting carbonaceous fuel
JPS57210205A (en) * 1981-06-22 1982-12-23 Central Res Inst Of Electric Power Ind Manufacture of inert gas through catalytic combustion
DE3428551A1 (en) * 1984-08-02 1986-02-13 Siemens AG, 1000 Berlin und 8000 München Process for operating a two-stage gasifying burner
US4995807A (en) * 1989-03-20 1991-02-26 Bryan Steam Corporation Flue gas recirculation system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 7, no. 68 (M-201)(1213) 19. März 1983 & JP-A-57 210 205 ( DENRIYOKU CHUO KENKYUSHO ) 23. Dezember 1982 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010015214A2 (en) * 2008-08-04 2010-02-11 Ewe Aktiengesellschaft Method for continuously conditioning gas, preferably natural gas
WO2010015214A3 (en) * 2008-08-04 2010-04-01 Ewe Aktiengesellschaft Method for continuously conditioning gas, preferably natural gas
RU2470225C2 (en) * 2008-08-04 2012-12-20 Эве Энерги Аг Method of continuous conditioning of gas, preferably natural gas
US8500831B2 (en) 2008-08-04 2013-08-06 Ewe Gasspeicher Gmbh Device for continuously conditioning fed-out natural gas
US8607820B2 (en) 2008-08-04 2013-12-17 Ewe Gasspeicher Gmbh Device for continuously mixing fed-out natural gas with oxygen to produce a burnable gas for heating the pressurized natural gas before or after the relaxation thereof
US8899045B2 (en) 2008-08-04 2014-12-02 Ewe Gasspeicher Gmbh Method of continuously conditioning gas, preferably natural gas

Also Published As

Publication number Publication date
DE4127883A1 (en) 1993-02-25
JPH05203109A (en) 1993-08-10
EP0529474A3 (en) 1993-05-26

Similar Documents

Publication Publication Date Title
DE69731240T2 (en) incinerator
EP0767345B1 (en) Process for operating a power plant
EP1393002B1 (en) Method and device for low-emission non-catalytic combustion of a liquid fuel
EP1730441A1 (en) Device and method for stabilizing the flame in a burner
DE7115807U (en) COMBUSTION FURNACE WITH HEAT EXCHANGE BETWEEN THE HOT EXHAUST GASES OF THE FURNACE AND A COOLER GAS FLOW SUPPLIED TO IT
WO2007019837A2 (en) Fuel cell system and method for the operation of a reformer
DE102009003521A1 (en) Method and device for staged combustion of air and fuel
EP0889289B1 (en) Gas turbine system and method of operation thereof
WO1998040669A1 (en) Diffusion flame combustor with premixing fuel and steam method and system
EP0655580A2 (en) Mixing device for oil or gasburner
CN1860334A (en) Method and device for the combustion of fuel
EP0529474A2 (en) Device for generating heat by catalytic combustion
DE2323919C2 (en) Process for burning carbonaceous fuels to produce energy in the form of heat
CH659515A5 (en) METHOD FOR BURNING GAS WITH A LOW HEATING VALUE AND BURNER FOR CARRYING OUT THE METHOD.
WO2000045456A1 (en) Device for evaporating and/or overheating a hydrocarbon
DE2659225A1 (en) METHOD AND DEVICE FOR BURNING CARBON FUELS
EP0477705B1 (en) Heating boiler
EP0789188A2 (en) Catalytic burner
WO1997049952A9 (en) Surface-combustion liquid-fuel burner and method of operating it
DE4324456C2 (en) Device for heating solid fluidized beds
EP0906545A1 (en) Surface-combustion liquid-fuel burner and method of operating it
DE3145028A1 (en) Method and device for the injection and recombustion of oxygenous exhaust gases, especially of exhaust gases from internal combustion engines
AT406899B (en) DEVICE FOR GENERATING ELECTRICAL ELECTRICITY AND HEAT WITH AT LEAST ONE FUEL CELL
AT406900B (en) Heating appliance
DE3803134C2 (en) Primary measures to reduce pollutants during combustion

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB IT NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT NL SE

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19931127