EP0350032B1 - Appareil de combustion - Google Patents

Appareil de combustion Download PDF

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Publication number
EP0350032B1
EP0350032B1 EP89112363A EP89112363A EP0350032B1 EP 0350032 B1 EP0350032 B1 EP 0350032B1 EP 89112363 A EP89112363 A EP 89112363A EP 89112363 A EP89112363 A EP 89112363A EP 0350032 B1 EP0350032 B1 EP 0350032B1
Authority
EP
European Patent Office
Prior art keywords
passage
incoming
fuel
gas
combustion
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.)
Expired - Lifetime
Application number
EP89112363A
Other languages
German (de)
English (en)
Other versions
EP0350032A2 (fr
EP0350032A3 (en
Inventor
Saburo Maruko
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.)
Nippon Chemical Plant Consultant Co Ltd
Original Assignee
Nippon Chemical Plant Consultant Co Ltd
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
Priority claimed from JP63170430A external-priority patent/JP2772955B2/ja
Priority claimed from JP63170429A external-priority patent/JP2681802B2/ja
Application filed by Nippon Chemical Plant Consultant Co Ltd filed Critical Nippon Chemical Plant Consultant Co Ltd
Priority to EP92105621A priority Critical patent/EP0493376B1/fr
Publication of EP0350032A2 publication Critical patent/EP0350032A2/fr
Publication of EP0350032A3 publication Critical patent/EP0350032A3/en
Application granted granted Critical
Publication of EP0350032B1 publication Critical patent/EP0350032B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
    • 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 
    • F23C7/00—Combustion apparatus characterised by arrangements for air supply
    • F23C7/008—Flow control devices
    • 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 
    • F23C99/00—Subject-matter not provided for in other groups of this subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details, e.g. burner cooling means, noise reduction means

Definitions

  • the present invention relates to a combustion apparatus according to the preamble of claim 1.
  • the combustion gas produced in this type of combustion apparatus is preferably produced through a complete combustion so as to be free from any of pollutants such as nitrogen oxides (NO x ), unburned hydrocarbons and carbon monoxide, and to be sufficiently low in its residual oxygen content.
  • pollutants such as nitrogen oxides (NO x ), unburned hydrocarbons and carbon monoxide, and to be sufficiently low in its residual oxygen content.
  • the combustion apparatus described in the item (1) suffers from the fact that the combustion gas is partially kept at a high temperature in order to keep the flame alight, which high temperature makes it impossible to prevent nitrogen oxides (NO x ) from occurring in the combustion gas.
  • NO x nitrogen oxides
  • the combustion gas produced in the combustion apparatus of the item (1) suffers from pollutants such as unburned hydrocarbons and the like together with a considerable amount of residual oxygen therein;
  • the combustion apparatus described in the item (2) enables the air/fuel mixture gas to burst into flame at a relatively low temperature.
  • an oxygen-containing gas such as air is mixed with fuel at a predetermined ratio to prepare an air/fuel mixture gas which is supplied under a predetermined pressure to the combustion unit of the apparatus.
  • the air/fuel mixing unit is provided with a venturi tube having a venturi throat portion in which a fuel discharge nozzle is provided.
  • a preheated air flows through the throat portion of the venturi tube of the air/fuel mixing unit, a partial vacuum is produced at the venturi throat portion. This vacuum then causes the fuel discharge nozzle to deliver a spray of fuel into the passing preheated air stream in the venturi throat portion.
  • the fuel in case that the combustion is conducted at a temperature of from 1200 to 1400 °C, the fuel is mixed with the oxygen-containing preheated gas or air in the air/fuel mixing unit, which air has been preheated to a temperature of from 500 to 900 °C.
  • the fuel discharge nozzle provided in the throat portion of the venturi tube is also heated to a temperature of from 500 to 900 °C together with a fuel feed pipe connected with the fuel discharge nozzle.
  • the fuel is often pyrolyzed or thermally decomposed to precipitate carbon particles in the fuel discharge nozzle and the fuel feed pipe. The thus precipitated carbon particles often clog these nozzle and pipe.
  • the combustion apparatus for supplying a high-temperature combustion gas (the temperature of which is about 1400 °C) to each of a plurality of boilers connected to each other in series is provided in a front portion of each of the boilers: the combustion gas discharged from the first one of the combustion apparatuses is supplied to the first one of the boilers; the combustion gas having passed through such first boiler is then supplied to the second one of the combustion apparatuses; the combustion gas having passed through such second combustion apparatus is supplied to the second one of the boilers; and operations similar to the above are sequentially conducted through the remaining boilers and combustion apparatuses until the combustion gas passes through the last one of the boilers; whereby multistage utilization of the combustion gas is realized.
  • a high-temperature combustion gas the temperature of which is about 1400 °C
  • the combustion gas is supplied at a temperature of about 1400 °C to each of the boilers, while discharged at a temperature of about 700 °C from each of the boilers after it passes through each of the boilers.
  • the thus discharged combustion gas is supplied to an air/fuel mixing unit of a subsequent combustion apparatus so as to be mixed with fuel and burned to be heated again to a temperature of about 1400 °C.
  • the venturi tube of the air/fuel mixing unit has been heated to a considerably high temperature in a portion in the vicinity of the fuel discharge nozzle, the fuel in the nozzle is often pyrolyzed or thermally decomposed to precipitate carbon particles which disadvantageously clog the fuel discharge nozzle in the venturi tube of the air/fuel mixing unit.
  • the present invention is made under such circumstances.
  • a combustion apparatus comprising:
  • the above objects of the present invention are accomplished by providing: The combustion apparatus having the above construction of the first embodiment of the present invention, wherein: a honeycomb passage member is provided in each of the outlet portions of the incoming passage and the outgoing passage.
  • the above objects of the present invention are accomplished by providing: The combustion apparatus having the above construction of the first embodiment of the present invention, wherein: both of the incoming passage and the outgoing passage are constructed of sleeve elements, provided that the sleeve element constituting the outgoing passage is smaller in diameter than the sleeve element constituting the incoming passage while concentrically disposed in the incoming passage.
  • both of the incoming passage and the outgoing passage are constructed of sleeve elements, provided that a plurality of the sleeve elements constitute the outgoing passage, each of which sleeve elements constituting the outgoing passage is smaller in diameter than the sleeve element constituting the incoming passage while disposed in the incoming passage.
  • the above objects of the present invention are accomplished by providing: The combustion apparatus having the above construction of the fourth embodiment of the present invention, wherein: at least one baffle plate member is so disposed in the incoming passage as to extend in a direction perpendicular to a longitudinal direction of the incoming passage.
  • the above objects of the present invention are accomplished by providing: The combustion apparatus having the above construction of the first embodiment of the present invention, wherein: the oxygen-containing gas/fuel mixing unit comprises: a venturi tube, provided with a venturi throat portion and surrounded by a heat-insulating material; a fuel feed pipe having its fuel discharge nozzle opened into the venturi throat portion of the venturi pipe, the fuel discharge nozzle being provided in a front-end portion of the fuel feed pipe; and a cooling unit for cooling suitable portions of the fuel discharge nozzle and the fuel feed pipe communicating with the fuel discharge nozzle.
  • the oxygen-containing gas/fuel mixing unit comprises: a venturi tube, provided with a venturi throat portion and surrounded by a heat-insulating material; a fuel feed pipe having its fuel discharge nozzle opened into the venturi throat portion of the venturi pipe, the fuel discharge nozzle being provided in a front-end portion of the fuel feed pipe; and a cooling unit for cooling suitable portions of the fuel discharge nozzle and the fuel feed pipe communicating with the fuel discharge nozzle.
  • Figs. 1 and 2 show a first embodiment of the combustion apparatus of the present invention, in which: the reference numeral 1 denotes an outer sleeve; and 2 an inner sleeve concentrically disposed in the outer sleeve 1. Both of the outer sleeve 1 and the inner sleeve 2 are made of ceramic materials. As shown in Fig. 1, an annular incoming passage 3 of an oxygen-containing gas/fuel mixture gas is defined between an inner peripheral surface of the outer sleeve 1 and an outer peripheral surface of the inner sleeve 2, while the interior portion of the inner sleeve 2 forms an outgoing passage 4 of a combustion gas.
  • the incoming passage 3 is closed at its end portion located in an upstream side of a stream of the mixture gas, while opened at its the other end portion into a space located in a downstream side of the stream of the mixture gas, the space being formed in an end portion of the outer sleeve 1 so as to communicate with an inlet opening of the outgoing passage 4. Consequently, the incoming passage 3 communicates with the outgoing passage 4 through such space.
  • a main incoming port 5 opens into a peripheral wall of the incoming passage 3 at a position in the vicinity of its end portion located in the upstream side of the mixture gas.
  • an auxiliary incoming port 6 also opens into the peripheral wall of the incoming passage 3 at a position circumferentially spaced apart from that of the main incoming opening 5.
  • An outlet opening of the outgoing passage 4 opens into a combustion-gas output port 7.
  • an annular honeycomb passage member 8 made of ceramic materials.
  • a plug-shaped honeycomb passage member 9 made of ceramic materials.
  • the outer sleeve 1 is fixedly mounted in an outer casing 10a through a heat-insulating material 10.
  • An oxygen-containing gas/fuel mixing unit 11 is connected to the main incoming port 5 in an upstream side of the incoming passage 3.
  • a pilot burner 12 is connected to the auxiliary incoming port 6 in the upstream side of the incoming passage 3.
  • a preheated oxygen-containing gas inlet pipe or preheated air inlet pipe 13 To the mixing unit 11 are connected: a preheated oxygen-containing gas inlet pipe or preheated air inlet pipe 13; and a fuel feed pipe 14.
  • Fuel supplied from the fuel feed pipe 14 is mixed with a preheated oxygen-containing gas (hereinafter simply referred as the preheated air) supplied from the preheated air inlet pipe 13 at a predetermined ratio in an air/fuel mixing portion 15 of the mixing unit 11 to prepare an air/fuel mixture gas which is supplied to an upstream side of the incoming passage 3.
  • an air inlet pipe 16 To the pilot burner 12 are connected: an air inlet pipe 16; and a fuel feed pipe 17.
  • a combustion gas issued from the pilot burner 12 is supplied to an upstream side
  • the pilot burner 12 is operated to issue the combustion gas to the upstream side of the incoming passage 3 so that the combustion gas heats both the outer sleeve 1 and the inner sleeve 2 in the upstream side of the incoming passage 3.
  • the mixing unit 11 is operated to issue an oxygen-containing gas/fuel mixture gas, i.e., an air/fuel mixture gas to the upstream side of the incoming passage 3 through the main incoming port 5.
  • operation of the pilot burner 12 is immediately, or gradually stopped so as to cooperate with that of the mixing unit 12 for a while.
  • the thus issued air/fuel mixture gas enters the incoming passage 3 through the main incoming port 5, and is brought into contact with both of the inner peripheral surface of the outer sleeve 1 and the outer peripheral surface of the inner sleeve 2, which peripheral surfaces have been heated to sufficiently high temperatures, so that the mixture gas bursts into flame to produce a combustion gas.
  • the thus produce combustion gas passes through the incoming passage 3 to enter the outgoing passage 4, and is then discharged from the combustion-gas outlet port 7. Consequently, the combustion gas heats the outer and inner peripheral surface of the incoming passage 3 and the inner peripheral surface of the outgoing passage 4 sequentially, to make it possible to attain a complete combustion of the mixture gas which is issued from the mixing unit 11 to the incoming passage 3.
  • the fuel supplied to the mixing unit 11 is so mixed with the preheated air in the mixing unit 11 as to constantly keep the combustion gas at a predetermined temperature of from 1200 to 1400 °C.
  • the combustion initiated at the upstream side of the incoming passage 3 propagates to the downstream side of the incoming passage 3, and further propagates to the outlet opening of the outgoing passage 4 therethrough. Consequently, the inner sleeve 2 interposed between the incoming passage 3 and the outgoing passage 4 is heated by the combustion gas in its inner and outer peripheral surface.
  • the honeycomb passage members 8 and 9, which are mounted in the downstream side end portion of the incoming passage 3 and the outlet opening of the outgoing passage 9 respectively, further ensure the mixture gas a complete combustion.
  • the inner peripheral surface of the outer sleeve 1 is coated with a suitable material excellent in infrared-absorption properties, it is possible to further increase the temperature of the inner peripheral surface of the outer sleeve 1 because infrared radiation from the outer peripheral surface of the inner sleeve 2 is effectively received by the inner peripheral surface of the outer sleeve 1 so as to increase the temperature of the inner peripheral surface of the outer sleeve 1.
  • the thus coated inner surface of the outer sleeve 1 may serve as an effective heating surface for enhancing the combustion of the mixture gas.
  • Figs. 3 to 5 show a second embodiment of the combustion apparatus of the present invention.
  • the components which are the same as ones in the first embodiment of the present invention shown in Figs. 1 and 2 have been given the same reference numerals, and therefore are not further explained hereinbelow.
  • a plurality of inner sleeves 22 made of ceramic materials are fixedly mounted in the outer sleeve 21 made of ceramic materials so that the incoming passage 23 is defined between the inner peripheral surface of the outer sleeve 21 and the outer peripheral surfaces of the inner sleeves 22.
  • the interior portion of each of the inner sleeves 22 forms the outgoing passage 24.
  • An upstream side end of the incoming passage 23 is closed with a supporting wall member 25 which supports each of the outlet opening portions of the inner sleeves 22.
  • Honeycomb passage members 26 and 27 are fixedly mounted in the downstream side portion of the incoming passage 23 and the outlet opening portions of the outgoing passages 24, respectively.
  • the second embodiment of the combustion apparatus of the present invention shown in Figs. 3 to 5 is the substantially same in operation as the first embodiment of the combustion apparatus of the present invention shown in Figs. 1 and 2.
  • the second embodiment of the combustion apparatus of the present invention is advantageous in producing a large quantity of the combustion gas.
  • the combustion gas reached the downstream side of the incoming passage 23 enters the honeycomb passage members 26.
  • the combustion gas having passed through the honeycomb passage members 26 enters the outgoing passages 24 in which the combustion gas is brought into contact with the inner peripheral walls of the inner sleeves 22 so as to be further heated to ensure the complete combustion of the mixture gas.
  • the combustion gas enters the honeycomb passage members 27, and passes therethrough to flow into the combustion-gas outlet port 7 from which the combustion gas is discharged.
  • the ceramic materials constituting each of the components may be silicon carbide which is excellent in mechanical strength, heat-resisting properties and thermal shock resistance.
  • these components are made of any other suitable ceramic materials such as zirconia-base ceramics and cordierite-base ceramics.
  • each of the outer sleeve 1, 21 and the sleeve-like casing 31 may be made of alumina-fiber ceramics.
  • the reference numeral 50 denotes a venturi tube comprising an inlet reducer portion 51, an outlet diffuser portion 52 and a venturi throat portion 53 sandwiched between these portions 50 and 51.
  • a performance-control rod 54 provided with a tapered front portion is threadably engaged with a supporting member 55 so as to be axially displaceable relative to the supporting member 55 which is fixedly mounted in the venturi tube 50.
  • a preheated-air inlet pipe 13 is connected to an air-inlet opening of the venturi tube 50 an air/fuel mixture gas outlet opening of which is connected to the combustion apparatus of the present invention.
  • a plurality of fuel discharge openings 56 are so provided in an inner peripheral surface of the throat portion 53 of the venturi tube 50 as to be spaced apart from each other in a circumferential direction of the of the inner peripheral surface of the throat portion 53, to which openings 56 a fuel feed pipe 14 is connected.
  • an annular water jacket 57 is placed around the venturi throat portion 53 to keep this portion 53 cool.
  • a cooling-water inlet pipe 58 To the water jacket 57 are connected: a cooling-water inlet pipe 58; and a cooling-water outlet pipe 59.
  • an incoming gas comprising the preheated air and the oxygen-containing gas such as the combustion gas is supplied from the preheated-air inlet pipe 13 to the venturi throat portion 53 in which the incoming gas is accelerated to cause the fuel discharge openings 56 to deliver the fuel in spraying manner so that the air/fuel mixture gas is produced.
  • the thus produced air/fuel mixture gas is then supplied to the combustion apparatus of the present invention, while agitated in the subsequent outlet diffuser portion 52 of the venturi tube 50.
  • the performance-control rod 54 is disposed in the axially central portion of the venturi throat portion 53, an axially central passage of the incoming gas in the venturi throat portion 53 is decreased in its cross-sectional area to keep a thickness of a stream of the incoming gas thin in the venturi throat portion 53. Consequently, even when the venturi throat portion 53 is relatively large in its cross-sectional area, it is possible to sufficiently accelerate the incoming gas and cause the resultant air/fuel mixture gas to rapidly agitated in the subsequent outlet diffuser portion 52 of the venturi tube 50.
  • the cross-sectional area of the venturi throat portion 53 is so controlled by axially displacing the performance-control rod 54 as to keep a flow rate of the incoming gas constant in the venturi throat portion 53 even when a quantity of the incoming gas varies, whereby it is possible to supply the air/fuel mixture gas having a constant mixing ratio to the combustion apparatus of the present invention.
  • a cooling water is supplied to the water jacket 57 to cool the venturi throat portion 53. Since the venturi throat portion 53 is adequately cooled in the above manner, the fuel discharge openings 56 and a front-end portion of the fuel feed pipe 14 connected thereto are also adequately cooled to prevent the fuel from being thermally decomposed in the fuel discharge openings 56. When the fuel is thermally decomposed to produce carbon particles, the fuel discharge openings 56 are clogged with the thus produced carbon particles. Consequently, it is possible to prevent the fuel discharge openings 56 from being clogged with the carbon particles by adequately cooling the venturi throat portion 53.
  • Fig. 7 shows a second embodiment of the air/fuel mixing unit employed in the combustion apparatus of the present invention, which second embodiment represents a constant-performance type air/fuel mixing unit.
  • the fuel discharge nozzle 56 is so disposed in the throat portion 53 of the venturi tube 50a as to be oriented toward a downstream side of the venturi tube 50a.
  • the fuel discharge nozzle 56 is formed in a front-end portion of the fuel feed pipe 14 around which is placed the water jacket 57 to which are connected the cooling-water inlet pipe 58 and the cooling-water outlet pipe 59.
  • a cooling water is supplied to the water jacket 57 to adequately cool both the fuel discharge nozzle 56 and the fuel feed pipe 14 so that the fuel is prevented from being thermally decomposed and from producing the carbon particles in the fuel discharge nozzle 56 and the fuel feed pipe 14, whereby these components 56, 14 are prevented from being clogged with the resultant carbon particles.
  • the reference numeral 61 denotes a heat-insulating material.
  • the venturi throat portion 53 is made of a suitable heat-resisting alloy such as Inconel alloys and Hastelloy alloys, while each of the inlet reducer portion 51, outlet diffuser portion 52 and other inner components of the venturi tube 50 is made of a suitable ceramic material such as silicon carbide, zirconia, cordierite and the like.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Gas Burners (AREA)

Claims (7)

  1. Appareil de combustion, caractérisé par :
    (a) un passage d'entrée (3, 23) permettant le passage de gaz de combustion dans un sens préfixé, ce passage d'entrée étant délimité par un matériau d'isolation thermique (10) disposé dans une partie pratiquement centrale d'une enveloppe extérieure (10a) et étant fermé à son extrémité amont,
    (b) un passage de sortie (4, 24) permettant aux gaz de combustion ayant traversé le passage d'entrée (3, 23) de s'écouler dans un sens opposé audit sens préfixé, ce passage de sortie (4, 24) étant ouvert à ses parties extrêmes opposées et étant disposé dans le passage d'entrée de façon à communiquer avec ce passage d'entrée, à l'extrémité aval de ce dernier, par un espace défini dans la partie extrême aval du passage d'entrée (3, 23),
    (c) un conduit principal d'entrée de mélange gazeux (5) permettant d'introduire un mélange gazeux constitué d'un gaz contenant de l'oxygène et de combustible, ce conduit principal d'entrée de mélange gazeux (5) étant relié directement à la partie extrême amont du passage d'entrée (3, 23) en traversant une paroi périphérique de ce dernier,
    (d) une unité de mélange (14) permettant de mélanger à un combustible un gaz contenant de l'oxygène, préchauffé, dans une proportion préfixée permettant de préparer ledit mélange gazeux, cette unité de mélange de gaz contenant de l'oxygène et de combustible étant reliée au conduit principal d'entrée de mélange gazeux (5) de façon à introduire le mélange gazeux dans le conduit principal d'entrée de mélange gazeux à une pression préfixée,
    (e) un conduit auxiliaire d'entrée de gaz de combustion (6) permettant d'introduire une autre quantité de gaz de combustion dans le passage d'entrée (3, 23), cette autre quantité de gaz de combustion étant produite en brûlant du combustible avec un gaz contenant de l'oxygène au moyen d'un brûleur-pilote, ce conduit auxiliaire d'entrée de gaz de combustion (6) étant relié à une partie extrême du passage d'entrée (3, 23) qui est diamétralement opposée au conduit principal d'entrée de mélange gazeux (5), et
    (f) un conduit de sortie de gaz de combustion (7) ménagé dans une partie latérale de l'enveloppe extérieure (10a) et du matériau d'isolation thermique (10) de façon à être relié à une partie de sortie du passage de sortie (4, 24) située du côté aval de ce dernier.
  2. Appareil de combustion suivant la revendication 1, caractérisé en ce qu'un élément de passage en nid d'abeilles (8, 9, 26, 27) est disposé dans chacune des parties de sortie du passage d'entrée (3, 23) et du passage de sortie (4,24).
  3. Appareil de combustion suivant l'une des revendications 1 et 2, caractérisé en ce que le passage d'entrée et le passage de sortie sont constitués l'un et l'autre d'éléments en forme de fourreau (1, 2, 21, 22), l'élément en forme de fourreau constituant le passage de sortie ayant un diamètre différent de celui de l'élément en forme de fourreau constituant le passage d'entrée.
  4. Appareil de combustion suivant l'une des revendications 1 et 2, caractérisé en ce que le passage d'entrée (3) et le passage de sortie (4) sont constitués l'un et l'autre d'éléments en forme de fourreau (1, 2), l'élément en forme de fourreau constituant le passage de sortie ayant un diamètre plus petit que celui de l'élément en forme de fourreau constituant le passage d'entrée, tout en étant disposé d'une manière concentrique dans ce passage d'entrée.
  5. Appareil de combustion suivant la revendication 3, caractérisé en ce que le passage d'entrée et le passage de sortie sont constitués l'un et l'autre d'éléments en forme de fourreau (21, 22), plusieurs des éléments en forme de fourreau constituant le passage de sortie, chacun de ces éléments en forme de fourreau constituant le passage de sortie ayant un diamètre plus petit que celui de l'élément en forme de fourreau constituant le passage d'entrée, tout en étant disposé dans ce passage d'entrée.
  6. Appareil de combustion suivant l'une des revendications 3 et 5, caractérisé en ce qu'au moins une pièce en forme de plaque déflectrice (28) est disposée dans le passage d'entrée (23) de façon à s'étendre selon une direction perpendiculaire à la direction longitudinale du passage d'entrée.
  7. Appareil de combustion suivant l'une quelconque des revendications 1 à 6, caractérisé en ce que l'unité de mélange de gaz contenant de l'oxygène et de combustible (15) comprend un tube de venturi (50), pourvu d'un col de venturi (53) et entouré d'un matériau d'isolation thermique (61), un tube d'alimentation en combustible dont l'ajutage d'injection de combustible (56) débouche dans le col de venturi du tube de venturi, cet ajutage d'injection de combustible étant prévu à la partie extrême avant du tube d'alimentation en combustible, et une unité de refroidissement (57, 58, 59) permettant de refroidir des parties appropriées de l'ajutage d'injection de combustible et du tube d'alimentation en combustible communiquant avec cet ajutage d'injection de combustible.
EP89112363A 1988-07-08 1989-07-06 Appareil de combustion Expired - Lifetime EP0350032B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP92105621A EP0493376B1 (fr) 1988-07-08 1989-07-06 Appareil de combustion

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP63170430A JP2772955B2 (ja) 1988-07-08 1988-07-08 燃焼器用の燃料混合器
JP170429/88 1988-07-08
JP63170429A JP2681802B2 (ja) 1988-07-08 1988-07-08 燃焼器
JP170430/88 1988-07-08

Related Child Applications (3)

Application Number Title Priority Date Filing Date
EP92105621A Division EP0493376B1 (fr) 1988-07-08 1989-07-06 Appareil de combustion
EP92105621A Division-Into EP0493376B1 (fr) 1988-07-08 1989-07-06 Appareil de combustion
EP92105621.4 Division-Into 1989-07-06

Publications (3)

Publication Number Publication Date
EP0350032A2 EP0350032A2 (fr) 1990-01-10
EP0350032A3 EP0350032A3 (en) 1990-11-07
EP0350032B1 true EP0350032B1 (fr) 1993-10-13

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EP89112363A Expired - Lifetime EP0350032B1 (fr) 1988-07-08 1989-07-06 Appareil de combustion
EP92105621A Expired - Lifetime EP0493376B1 (fr) 1988-07-08 1989-07-06 Appareil de combustion

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EP (2) EP0350032B1 (fr)
DE (2) DE68924539T2 (fr)

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US6517341B1 (en) 1999-02-26 2003-02-11 General Electric Company Method to prevent recession loss of silica and silicon-containing materials in combustion gas environments

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* Cited by examiner, † Cited by third party
Title
R. Hacker, "Benennung von Regenerativwärmetauschern", Wärme, Heft 3, 1972 *

Also Published As

Publication number Publication date
EP0350032A2 (fr) 1990-01-10
EP0493376A3 (fr) 1992-08-19
DE68924539D1 (de) 1995-11-16
DE68924539T2 (de) 1996-04-18
DE68909851D1 (de) 1993-11-18
EP0350032A3 (en) 1990-11-07
DE68909851T2 (de) 1994-05-05
EP0493376B1 (fr) 1995-10-11
EP0493376A2 (fr) 1992-07-01

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