EP0190091A1 - Linear gas burner having air blown into it - Google Patents

Linear gas burner having air blown into it Download PDF

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Publication number
EP0190091A1
EP0190091A1 EP86440004A EP86440004A EP0190091A1 EP 0190091 A1 EP0190091 A1 EP 0190091A1 EP 86440004 A EP86440004 A EP 86440004A EP 86440004 A EP86440004 A EP 86440004A EP 0190091 A1 EP0190091 A1 EP 0190091A1
Authority
EP
European Patent Office
Prior art keywords
gas
air
injectors
distributor tube
tube
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.)
Granted
Application number
EP86440004A
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German (de)
French (fr)
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EP0190091B1 (en
Inventor
Michel Coulon
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.)
ALSACE GAZ INDUSTRIE SA
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ALSACE GAZ INDUSTRIE SA
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Publication date
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Priority to AT86440004T priority Critical patent/ATE33068T1/en
Publication of EP0190091A1 publication Critical patent/EP0190091A1/en
Application granted granted Critical
Publication of EP0190091B1 publication Critical patent/EP0190091B1/en
Expired legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2207/00—Ignition devices associated with burner

Definitions

  • the present invention relates to a linear gas and blown air burner, comprising several injectors arranged at the entrance to a combustion zone, an air distributor tube connected to a pressurized air supply, a gas distributor tube mounted inside the air distributor tube and connected to a pressurized gas supply, said injectors comprising a row of gas injectors distributed along the gas distributor tube and connected to this tube, and air injectors arranged coaxially around the gas injectors and connected to the air distributor tube, the gas injectors and the air injectors respectively comprising tubular elements fixed to the corresponding distributor tube, these respective elements being arranged coaxially so as to define an annular duct between them for the passage of air.
  • the power ratio of this type of burners is limited approximately to 1: 6 by the conditions of flame stability.
  • burners of the blown air type are used, in which the gas and the air are brought under pressure and are brought into contact at the end of an injector, at the entrance to the combustion zone. These burners can reach a power ratio going beyond 1:20.
  • a linear ramp made up of such burners is particularly expensive and complex because it requires individual distribution of air to each burner, with corresponding command and control members. This complexity also affects the cost of maintenance. In furthermore, in the area near the burners, the heat produced is not evenly distributed.
  • US Pat. No. 3,799,747 describes a device of the type indicated in the preamble, with a distribution tube of gas placed inside an air distributor tube and equipped with gas injectors extending coaxially in air injection tubes, fixed themselves on the air distributor tube.
  • This solution has the advantage of great ease of adjustment of the linear burner constituted by this injector rail, as well as great operational safety.
  • this device is difficult to adjust and maintain, because the gas injectors are difficult to access. It is therefore necessary to disassemble each injector before maintenance operations.
  • this device is not arranged to produce a continuous linear flame.
  • the present invention aims to remedy these drawbacks, by providing a linear burner of the type mentioned in the preamble, having a simple and economical construction, allowing great ease of maintenance and adjustment while ensuring a uniform distribution of heat and high operational safety.
  • the linear burner according to the invention is characterized in that one of the ends of the air distributor tube is connected to the pressurized air supply and its second end is closed by a removable plug, in that that the gas distributor tube comprises two support rods which are arranged parallel to the gas injectors and which are fixed by removable means to the wall of the air distributor tube, and in that the maximum transverse dimension of the gas distributor tube with the tubular elements of the gas injectors is less than the inside diameter of the air distributor tube, so as to allow the introduction and removal of the gas distributor tube with its injectors through the second end of the air distributor tube.
  • the maximum transverse dimension of the gas distributor tube with the entire gas injectors is less than the inside diameter of the air distributor tube.
  • Said removable means may comprise, for example nuts screwed onto the support rods and arranged outside the air distributor tube, so as to be easily accessible.
  • the linear burner according to the invention may comprise modular elements assembled end to end to constitute the air and gas distributor tubes. Burners of different sizes and powers can thus be produced from a small number of different parts.
  • the linear burner according to the invention comprises a flame guide constituted by an envelope surrounding the row of injectors and the combustion zone, this flame guide being mounted on the air distributor tube and being open only on the side opposite this tube.
  • the flame guide is advantageously made of refractory metal and it has support legs, these legs being held by screws on the air distributor tube or on elements integral with this tube. This method of fixing makes it possible to limit the transmission of heat and also allows different expansions of the flame guide and of the air distributor tube.
  • the flame guide delimits a linear combustion zone extending along the entire row of injectors
  • the flame has a linear shape, extending from one end to the other of the row of injectors.
  • the burner may comprise a single pair of ignition electrodes, mounted in the flame guide, approximately in the middle of the length thereof.
  • a flame control cell mounted at one end of the flame guide.
  • the burner comprises on the air supply a valve for adjusting the air flow, and a valve for adjusting the gas flow on the gas supply. It may also include a device for controlling the flow of gas to the flow of air, by slaving the gas flow control valve to the air flow control valve and / or a flow meter mounted on the gas supply.
  • the linear burner comprises an air distributor tube 1 consisting of a straight steel tube, the two ends of which are provided with flange connections. On its outer face, this tube carries a longitudinal row of air injectors 2, which are arranged in parallel and which each consist of a steel tube threaded at its lower end and screwed into a threaded hole in the wall of the tube air distributor 1.
  • the front end of the distributor tube 1 (on the right in FIG. 1) is closed by a plug 3 fixed to the flange of the tube 1 by bolts 4.
  • the other end of the tube 1 is connected, via a connection element 5, to an air supply line 6, comprising an adjustment valve (not shown). In service, line 6 is connected to a low pressure air source.
  • a gas distributor tube 8 constituted by a straight steel tube, is mounted longitudinally inside the air distributor tube 1, opposite the air injectors 2. It carries a row of gas injectors 9 which respectively correspond to the air injectors 2 and which are arranged coaxially inside these.
  • the gas injectors 9 are screwed or welded into lateral orifices of the gas distributor tube 8, so as to receive the gas under pressure.
  • the gas distributor tube 8 extends substantially over the entire length of the air distributor tube 1. Its front end is closed by a plug 10. Its other end is located inside the connection element 5 and it is provided with a 90 ° elbow 11 which fits on a sleeve 12 mounted in the wall of the connection element 5 and connected to a gas supply pipe 13 provided with an adjustment valve (not shown ).
  • the gas distributor tube 8 is mounted parallel to the longitudinal axis 14 of the air distributor tube 1, but not necessarily in the coaxial position. It is supported and maintained in the appropriate position by means of two threaded rods 16 carrying nuts 17. These rods are placed respectively beyond each end of the row of injectors, parallel to these injectors, and each pass through a orifice in the wall of the tube 1. Thus, by acting on the nuts 17, one can adjust the position of the gas distributor tube 8 by moving it in the axial direction of the injectors. In doing so, the gas injectors 9 slide inside the air injectors 2. On the other hand, this method of attachment allows easy disassembly of the distributor tube 8 and the gas injectors 9, as will be described below. .
  • the burner further comprises a flame guide 20 constituted by a refractory metal casing surrounding the row of injectors 2 and 9 and delimiting a common combustion zone 21 opposite them.
  • the flame guide 20 has transversely a flared shape and it is fully open on the side opposite the air distributor tube, that is to say upwards in the position illustrated here.
  • the flame guide 20 has support legs 23 which are clamped against the air distributor tube 1 by claws 24, these claws being fixed to the tube 1 by screws 25 which are screwed into tapped bores in the wall of the tube 1.
  • This method of attachment allows both easy disassembly of the flame guide 20 and low heat transmission of the guide flame to the air distributor tube. It also makes it possible to have a joint between these two elements, if necessary. It also allows different expansions of the flame guide and the distributor tube 1.
  • the ignition of the gas and air mixture can be carried out by means of a single candle 26 disposed approximately in the middle of the length of the flame guide.
  • the spark plug 26 comprises in a known manner a body 27 and two electrodes 28 and 29.
  • the body 27 is screwed into a threaded bore through one of the side walls of the flame guide 20, in such a way that the electrodes 28 and 29 are located opposite an air / gas mixture injector.
  • the spark plug 26 is connected to a high voltage electrical supply 26 '.
  • the burner comprises a control cell 30, of a type known per se, which is connected by a cable 31 to the control device.
  • the control cell 30 is oriented along the longitudinal axis of the combustion zone 21. It is mounted inside a cooling tube 32 which is itself fixed, by through a threaded sleeve 33, to a tube 34 fixed in an end opening of the flame guide 20.
  • a quartz disk 35 is inserted inside the sleeve 33
  • the cooling tube 32 has air inlet holes 36 and a vertical vent 37, arranged so as to produce a natural circulation of air around the cell 30 when it heats up.
  • the flame control can also be ensured by an ionization electrode according to the usual method.
  • FIG 3 shows in more detail the embodiment of the air injectors 2 and gas 9 used in the linear burner described above.
  • the injec gas tor 9 comprises a steel tube 40, one end 41 of which is screwed into a threaded orifice in the wall of the gas distributor tube 8.
  • a head 42 of known type comprising two elements 43 and 44 assembled by means of threads and between which is formed a circular slot 45 for the exhaust of the gas.
  • the relative arrangement of the injectors 2 and 42 allows a homogeneous mixture of air and gas.
  • the air injector 2 simply consists of a steel tube screwed into the wall of the air distributor tube 1.
  • the air injector 2 is arranged coaxially with the gas injector 9 , so that there remains between them an annular gap 46 for the passage of air.
  • a ring 47 provided with radial fins 48 of suitable shape is placed in the annular gap 46. This ring annular 47 is held in place by two respective shoulders of the tube 40 and of the head 42. It also serves as a centering member for the gas injector 9 in the air injector 2.
  • the construction described above of the burner according to the invention is particularly simple and can be produced from inexpensive elements which are currently commercially available.
  • the tubes used to make the distribution tubes 1 and 8, as well as the tubular elements 2 and 40 of the injectors are preferably steel tubes of a standard series.
  • the heads 42 of the gas injectors 9 can be elements existing on the market.
  • the burner described above is arranged to allow very easy disassembly of the distributor tube 8 and the gas injectors fixed thereon.
  • the length of the tubular elements 40 of the gas injectors (FIG. 3) is determined in such a way that the maximum transverse dimension of the block constituted by the gas distributor tube 8 and the tubular elements 40 is less than the inside diameter of the tube.
  • air distributor 1 So, after removing the heads 42 of the gas injectors and the plug 3 of the air distributor tube ( Figure 1), you can disconnect the gas distributor tube 8 from the fitting 12, then remove the external nuts 17 from the support rods 16, which allows 'easily extract the assembly of the tube 8 and its injectors 9. After maintenance operation, this assembly can be replaced without difficulty.
  • the linear burner according to the invention can be controlled by the known means used to control the point burners.
  • a device is provided for controlling the gas flow control valve to the air flow control valve, as well as possibly to a flow meter mounted on the gas supply, upstream of the valve. adjustment.
  • This servo device is arranged to maintain a constant ratio between the gas flow and the air flow, in order to obtain optimal combustion. In this way, the power of the burner can be adjusted by acting only on the air flow control valve.
  • FIG. 4 shows in cross section an embodiment with some modifications compared to the example described above.
  • the general arrangement of the elements is unchanged, but the shape and the method of fixing the injectors, the flame guide and the spark plug are different.
  • the gas distributor tube 8 carries gas injectors 49 which are shorter than in the previous case and which comprise a tubular element 50, screwed onto the tube 8, and a head 52 similar in principle to the head 42 described above.
  • An air injector 60 is formed by a tubular element provided at its base with a flange 61 which makes it possible to simply position the injector 60 fitted into a bore 62 of the wall of the air distributor tube 1.
  • the flanges 61 d a row of air injectors 60 are maintained on each side of the burner by a clamping profile 63 fixed to the tube 1 by bolts 64.
  • the interior of the air injector 60 has a shoulder 65, intended to retain a swirl washer 57 in the annular duct 56 delimited by the two injectors, and a flared upper part 66 which is extended by the flame guide 70 surrounding the combustion zone 71.
  • the flame guide is provided with support legs 73 which are tightened on the profiles 63 by means of screws 74. Thus, the heat transmission from the flame guide 70 to the tubes 1 and 8 is very reduced.
  • the flame guide is equipped with an adjustable support 75 for an ignition electrode 76 and for an ionization electrode 77, in place of the spark plug 26 mentioned above.
  • the gas injector 49 is short enough so that the maximum transverse dimension H of the block constituted by the gas distributor tube 8 and the complete injectors 49 is smaller than the inside diameter of the air distributor tube 1 and therefore allows the entire row of injectors 49 to be extracted directly through the tube 1.
  • the disassembly of the air injectors 60 is also particularly easy.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
  • Gas Burners (AREA)

Abstract

1. Linear gas burner having air blown into it, comprising several injectors disposed at the entry to a combustion zone, an air distribution tube (1) connected to a pressurised air supply, a gas distribution tube (8) mounted inside the air distribution tube and connected to a pressurised gas supply, the said injectors comprising a row of gas injectors (9, 49) distributed along the gas distribution tube and connected to this tube, and air injectors (2, 60) disposed coaxially around the gas injectors and connected to the air distribution tube, the gas injectors and air injectors comprising respectively tubular elements (2, 40, 50, 60) fixed to the corresponding distribution tube, these respective elements being coaxially disposed so as to define an annular duct (46, 56) between them for the passage of air, characterised in that one of the ends of the air distribution tube (1) is connected to the pressurised air supply (6) and its second end is blocked by a removable stopper (3), in that the gas distribution tube has two support rods (16) which are disposed parallel to the gas injectors and which are fixed by removable means (17) to the wall of the air distribution tube, and in that the maximum transversal dimension of the gas distribution tube (8) with tubular elements (40, 50, 52) of gas injectors is less than the interior diameter of the air distribution tube, so as to enable the introduction and the withdrawal of the gas distribution tube with its injectors through the second end of the air distribution tube.

Description

La présente invention concerne un brûleur linéaire à gaz et à air soufflé, comportant plusieurs injecteurs disposés à l'entrée d'une zone de combustion, un tube distributeur d'air raccordé à une alimentation en air sous pression, un tube distributeur de gaz monté à l'intérieur du tube distributeur d'air et raccordé à une alimentation en gaz sous pression, lesdits injecteurs comprenant une rangée d'injecteurs de gaz répartis le long du tube distributeur de gaz et raccordés à ce tube, et des injecteurs d'air disposés coaxialement autour des injecteurs de gaz et raccordés au tube distributeur d'air, les injecteurs de gaz et les injecteurs d'air comportant respectivement des éléments tubulaires fixés au tube distributeur correspondant, ces éléments respectifs étant disposés coaxialement de façon à définir un conduit annulaire entre eux pour le passage de l'air.The present invention relates to a linear gas and blown air burner, comprising several injectors arranged at the entrance to a combustion zone, an air distributor tube connected to a pressurized air supply, a gas distributor tube mounted inside the air distributor tube and connected to a pressurized gas supply, said injectors comprising a row of gas injectors distributed along the gas distributor tube and connected to this tube, and air injectors arranged coaxially around the gas injectors and connected to the air distributor tube, the gas injectors and the air injectors respectively comprising tubular elements fixed to the corresponding distributor tube, these respective elements being arranged coaxially so as to define an annular duct between them for the passage of air.

Dans de nombreux procédés thermiques industriels, notamment dans l'industrie alimentaire et l'industrie textile, on utilise des brûleurs à gaz naturel ou à gaz de pétrole liquéfié, d'une part parce que ce combustible est économique, d'autre part parce que les produits de combustion ne laissent pas de traces sur les produits traités. Pour réaliser des brûleurs de grande dimension, assurant une large répartition de la chaleur produite, on a réalisé des rampes de brûleurs, grâce auxquelles le gaz est brûlé dans une veine d'air atmosphérique circulant de manière naturelle ou forcée autour de la rampe.In many industrial thermal processes, in particular in the food industry and the textile industry, natural gas or liquefied petroleum gas burners are used, on the one hand because this fuel is economical, on the other hand because the products of combustion do not leave traces on the treated products. In order to produce large burners, ensuring a wide distribution of the heat produced, burner banks have been produced, by means of which the gas is burned in a stream of atmospheric air circulating naturally or forced around the bank.

Cependant, le rapport de puissance de ce type de brûleurs, c'est-à-dire le rapport entre le débit minimum et le débit maximum du gaz, est limité approximativement à 1:6 par les conditions de stabilité de la flamme. Pour pallier cet inconvénient, on utilise des brûleurs de type à air soufflé, dans lesquels le gaz et l'air sont amenés sous pression et sont mis en présence au bout d'un injecteur, à l'entrée de la zone de combustion. Ces brûleurs peuvent atteindre un rapport de puissance allant au-delà de 1:20. Toutefois, une rampe linéaire constituée de tels brûleurs est particulièrement coûteuse et complexe du fait qu'elle nécessite une distribution individuelle de l'air à chaque brûleur, avec des organes de commande et de contrôle correspondants. Cette complexité se répercute aussi sur le coût de l'entretien. En outre, dans la zone proche des brûleurs, la chaleur produite n'est pas répartie uniformément.However, the power ratio of this type of burners, that is to say the ratio between the minimum flow rate and the maximum gas flow rate, is limited approximately to 1: 6 by the conditions of flame stability. To overcome this drawback, burners of the blown air type are used, in which the gas and the air are brought under pressure and are brought into contact at the end of an injector, at the entrance to the combustion zone. These burners can reach a power ratio going beyond 1:20. However, a linear ramp made up of such burners is particularly expensive and complex because it requires individual distribution of air to each burner, with corresponding command and control members. This complexity also affects the cost of maintenance. In furthermore, in the area near the burners, the heat produced is not evenly distributed.

Afin d'assurer une distribution uniforme d'un combustible gazeux et de l'air à une série de brûleurs dans un lit fluidifié, le brevet US-A-3 799 747 décrit un dispositif du type indiqué en préambule, avec un tube distributeur de gaz placé à l'intérieur d'un tube distributeur d'air et équipé d'injecteursde gaz s'étendant coaxialement dans des tubes d'injection d'air, fixés eux-mêmes sur le tube distributeur d'air. Cette solution présente l'avantage d'une grande facilité de réglage du brûleur linéaire constitué par cette rampe d'injecteurs, ainsi qu'une grande sécurité de fonctionnement. Toutefois, ce dispositif est difficile à ajuster et à entretenir, parce que les injecteurs de gaz sont difficilement accessibles. Il est donc nécessaire de démonter chaque injecteur avant les opérations d'entretien. En outre, ce dispositif n'est pas agencé pour produire une flamme linéaire continue.In order to ensure uniform distribution of a gaseous fuel and air to a series of burners in a fluidized bed, US Pat. No. 3,799,747 describes a device of the type indicated in the preamble, with a distribution tube of gas placed inside an air distributor tube and equipped with gas injectors extending coaxially in air injection tubes, fixed themselves on the air distributor tube. This solution has the advantage of great ease of adjustment of the linear burner constituted by this injector rail, as well as great operational safety. However, this device is difficult to adjust and maintain, because the gas injectors are difficult to access. It is therefore necessary to disassemble each injector before maintenance operations. In addition, this device is not arranged to produce a continuous linear flame.

Par conséquent, la présente invention a pour but de remédier à ces inconvénients, en fournissant un brûleur linéaire du type mentionné en préambule, présentant une construction simple et économique, permettant de grandes facilités d'entretien et de réglage tout en assurant une répartition uniforme de la chaleur et une grande sécurité de fonctionnement.Therefore, the present invention aims to remedy these drawbacks, by providing a linear burner of the type mentioned in the preamble, having a simple and economical construction, allowing great ease of maintenance and adjustment while ensuring a uniform distribution of heat and high operational safety.

Dans ce but, le brûleur linéaire selon l'invention est caractérisé en ce que l'une des extrémités du tube distributeur d'air est raccordée à l'alimentation en air sous pression et sa seconde extrémité est obturée par un bouchon démontable, en ce que le tube distributeur de gaz comporte deux tiges de support qui sont disposées parallèlement aux injecteurs de gaz et qui sont fixées par des moyens démontables à la paroi du tube distributeur d'air, et en ce que la dimension transversale maximale du tube distributeur de gaz avec les éléments tubulaires des injecteurs de gaz est inférieure au diamètre intérieur du tube distributeur d'air, de manière à permettre l'introduction et le retrait du tube distributeur de gaz avec ses injecteurs par la seconde extrémité du tube distributeur d'air.For this purpose, the linear burner according to the invention is characterized in that one of the ends of the air distributor tube is connected to the pressurized air supply and its second end is closed by a removable plug, in that that the gas distributor tube comprises two support rods which are arranged parallel to the gas injectors and which are fixed by removable means to the wall of the air distributor tube, and in that the maximum transverse dimension of the gas distributor tube with the tubular elements of the gas injectors is less than the inside diameter of the air distributor tube, so as to allow the introduction and removal of the gas distributor tube with its injectors through the second end of the air distributor tube.

De préférence, la dimension transversale maximale du tube distributeur de gaz avec les injecteurs de gaz au complet est inférieure au diamètre intérieur du tube distributeur d'air. Lesdits moyens démontables peuvent comporter par exemple des écrous vissés sur les tiges de support et disposés à l'extérieur du tube distributeur d'air, de manière à être facilement accessibles.Preferably, the maximum transverse dimension of the gas distributor tube with the entire gas injectors is less than the inside diameter of the air distributor tube. Said removable means may comprise, for example nuts screwed onto the support rods and arranged outside the air distributor tube, so as to be easily accessible.

Le brûleur linéaire selon l'invention peut comprendre des éléments modulaires assemblés bout à bout pour constituer les tubes distributeurs d'air et de gaz. On peut réaliser ainsi des brûleurs de différentes dimensions et puissances à partir d'un petit nombre de pièces différentes.The linear burner according to the invention may comprise modular elements assembled end to end to constitute the air and gas distributor tubes. Burners of different sizes and powers can thus be produced from a small number of different parts.

De préférence, le brûleur linéaire selon l'invention comporte un guide-flamme constitué par une enveloppe entourant la rangée d'injecteurs et la zone de combustion, ce guide-flamme étant monté sur le tube distributeur d'air et étant ouvert uniquement du côté opposé à ce tube. Le guide-flamme est réalisé avantageusement en métal réfractaire et il comporte des pattes d'appui, ces pattes étant maintenues par des vis sur le tube distributeur d'air ou sur des éléments solidaires de ce tube. Ce mode de fixation permet de limiter la transmission de chaleur et permet aussi des dilatations différentes du guide-flamme et du tube distributeur d'air.Preferably, the linear burner according to the invention comprises a flame guide constituted by an envelope surrounding the row of injectors and the combustion zone, this flame guide being mounted on the air distributor tube and being open only on the side opposite this tube. The flame guide is advantageously made of refractory metal and it has support legs, these legs being held by screws on the air distributor tube or on elements integral with this tube. This method of fixing makes it possible to limit the transmission of heat and also allows different expansions of the flame guide and of the air distributor tube.

Du fait que le guide-flamme délimite une zone linéaire de combustion s'étendant le long de toute la rangée des injecteurs, la flamme affecte une forme linéaire, s'étendant d'un bout à l'autre de la rangée d'injecteurs. Ainsi, le brûleur peut comporter une seule paire d'électrodes d'allumage, montées dans le guide-flamme, approximativement au milieu de la longueur de celui-ci. De même, pour surveiller l'ensemble de la flamme, il peut comporter une cellule de contrôle de flamme montée à une extrémité du guide-flamme.Because the flame guide delimits a linear combustion zone extending along the entire row of injectors, the flame has a linear shape, extending from one end to the other of the row of injectors. Thus, the burner may comprise a single pair of ignition electrodes, mounted in the flame guide, approximately in the middle of the length thereof. Similarly, to monitor the entire flame, it may include a flame control cell mounted at one end of the flame guide.

Selon une forme de réalisation avantageuse, le brûleur comporte sur l'alimentation en air une vanne de réglage du débit d'air, et une vanne de réglage du débit de gaz sur l'alimentation en gaz. Il peut comporter en outre un dispositif d'asservissement du débit de gaz au débit d'air, par asservissement de la vanne de réglage du débit de gaz à la vanne de réglage du débit d'air et/ou à un débitmètre monté sur l'alimentation en gaz.According to an advantageous embodiment, the burner comprises on the air supply a valve for adjusting the air flow, and a valve for adjusting the gas flow on the gas supply. It may also include a device for controlling the flow of gas to the flow of air, by slaving the gas flow control valve to the air flow control valve and / or a flow meter mounted on the gas supply.

La présente invention sera mieux comprise à l'aide de la description, donnée ci-dessous à titre d'exemple, d'une forme de réalisation préférée et en référence aux dessins annexés, dans lesquels :

  • . La figure 1 est une vue en élévation, partiellement coupée, d'un brûleur linéaire selon l'invention,
  • . La figure 2 est une vue en coupe du brûleur, suivant la ligne II-II de la figure 1, à une échelle agrandie,
  • . La figure 3 est une vue en coupe longitudinale d'un injecteur du même brûleur, et
  • . La figure 4 est une vue en coupe transversale montrant une autre forme de réalisation.
The present invention will be better understood with the aid of the description, given below by way of example, of a preferred embodiment and with reference to the appended drawings, in which:
  • . FIG. 1 is an elevation view, partially cut away, of a linear burner according to the invention,
  • . FIG. 2 is a sectional view of the burner, on the line II-II of FIG. 1, on an enlarged scale,
  • . FIG. 3 is a view in longitudinal section of an injector of the same burner, and
  • . Figure 4 is a cross-sectional view showing another embodiment.

En référence aux figures 1 et 2, le brûleur linéaire comporte un tube distributeur d'air 1 constitué par un tube rectiligne en acier dont les deux extrémités sont pourvues de raccords à brides. Sur sa face extérieure, ce tube porte une rangée longitudinale d'injecteurs d'air 2, qui sont disposés parallèlement et qui sont constitués chacun par un tube d'acier taraudé à son extrémité inférieure et vissé dans un orifice taraudé dans la paroi du tube distributeur d'air 1. L'extrémité avant du tube distributeur 1 (à droite sur la figure 1) est obturée par un bouchon 3 fixé sur la bride du tube 1 par des boulons 4. L'autre extrémité du tube 1 est reliée, par l'intermédiaire d'un élément de raccord 5, à une conduite d'alimentation en air 6, comportant une vanne de réglage (non représentée). En service, la conduite 6 est raccordée à une source d'air à basse pression.Referring to Figures 1 and 2, the linear burner comprises an air distributor tube 1 consisting of a straight steel tube, the two ends of which are provided with flange connections. On its outer face, this tube carries a longitudinal row of air injectors 2, which are arranged in parallel and which each consist of a steel tube threaded at its lower end and screwed into a threaded hole in the wall of the tube air distributor 1. The front end of the distributor tube 1 (on the right in FIG. 1) is closed by a plug 3 fixed to the flange of the tube 1 by bolts 4. The other end of the tube 1 is connected, via a connection element 5, to an air supply line 6, comprising an adjustment valve (not shown). In service, line 6 is connected to a low pressure air source.

Un tube distributeur de gaz 8, constitué par un tube rectiligne en acier, est monté longitudinalement à l'intérieur du tube distributeur d'air 1, en face des injecteurs d'air 2. Il porte une rangée d'injecteurs de gaz 9 qui correspondent respectivement aux injecteurs d'air 2 et qui sont disposés coaxialement à l'intérieur de ceux-ci. Les injecteurs de gaz 9 sont vissés ou soudés dans des orifices latéraux du tube distributeur de gaz 8, de manière à recevoir ainsi le gaz sous pression.A gas distributor tube 8, constituted by a straight steel tube, is mounted longitudinally inside the air distributor tube 1, opposite the air injectors 2. It carries a row of gas injectors 9 which respectively correspond to the air injectors 2 and which are arranged coaxially inside these. The gas injectors 9 are screwed or welded into lateral orifices of the gas distributor tube 8, so as to receive the gas under pressure.

Le tube distributeur de gaz 8 s'étend sensiblement sur toute la longueur du tube distributeur d'air 1. Son extrémité avant est obturée par un bouchon 10. Son autre extrémité se trouve à l'intérieur de l'élément de raccord 5 et elle est munie d'un coude 11 à 90° qui s'emboite sur un manchon 12 monté dans la paroi de l'élément de raccord 5 et raccordé à une conduite d'alimentation en gaz 13 pourvue d'une vanne de réglage (non représentée).The gas distributor tube 8 extends substantially over the entire length of the air distributor tube 1. Its front end is closed by a plug 10. Its other end is located inside the connection element 5 and it is provided with a 90 ° elbow 11 which fits on a sleeve 12 mounted in the wall of the connection element 5 and connected to a gas supply pipe 13 provided with an adjustment valve (not shown ).

Le tube distributeur de gaz 8 est monté parallèlement à l'axe longitudinal 14 du tube distributeur d'air 1, mais pas nécessairement en position coaxiale. Il est supporté et maintenu dans la position appropriée au moyen de deux tiges filetées 16 portant des écrous 17. Ces tiges sont placées respectivement au-delà de chaque extrémité de la rangée d'injecteurs, parallèlement à ces injecteurs, et elle passent chacune dans un orifice ménagé dans la paroi du tube 1. Ainsi, en agissant sur les écrous 17, on peut régler la position du tube distributeur de gaz 8 en le déplaçant dans la direction axiale des injecteurs. Ce faisant, les injecteurs de gaz 9 coulissent à l'intérieur des injecteurs d'air 2. D'autre part, ce mode de fixation permet un démontage facile du tube distributeur 8 et des injecteurs de gaz 9, comme on le décrira plus loin.The gas distributor tube 8 is mounted parallel to the longitudinal axis 14 of the air distributor tube 1, but not necessarily in the coaxial position. It is supported and maintained in the appropriate position by means of two threaded rods 16 carrying nuts 17. These rods are placed respectively beyond each end of the row of injectors, parallel to these injectors, and each pass through a orifice in the wall of the tube 1. Thus, by acting on the nuts 17, one can adjust the position of the gas distributor tube 8 by moving it in the axial direction of the injectors. In doing so, the gas injectors 9 slide inside the air injectors 2. On the other hand, this method of attachment allows easy disassembly of the distributor tube 8 and the gas injectors 9, as will be described below. .

Le brûleur comporte en outre un guide-flamme 20 constitué par une enveloppe en métal réfractaire entourant la rangée d'injecteurs 2 et 9 et délimitant une zone de combustion 21 commune en face de ceux-ci. Comme le montre la figure 2, le guide-flamme 20 présente transversalement une forme évasée et il est entièrement ouvert du côté opposé au tube distributeur d'air, c'est-à-dire vers le haut dans la position illustrée ici. De l'autre côté, le guide-flamme 20 comporte des pattes d'appui 23 qui sont serrées contre le tube distributeur d'air 1 par des griffes 24, ces griffes étant fixées au tube 1 par des vis 25 qui sont vissées dans des alésages taraudés dans la paroi du tube 1. Ce mode de fixation permet à la fois un démontage facile du guide-flamme 20 et une faible transmission de chaleur du guide-flamme au tube distributeur d'air. Il permet également de disposer un joint entre ces deux éléments, si c'est nécessaire. Il permet aussi des dilatations différentes du guide-flamme et du tube distributeur 1.The burner further comprises a flame guide 20 constituted by a refractory metal casing surrounding the row of injectors 2 and 9 and delimiting a common combustion zone 21 opposite them. As shown in Figure 2, the flame guide 20 has transversely a flared shape and it is fully open on the side opposite the air distributor tube, that is to say upwards in the position illustrated here. On the other side, the flame guide 20 has support legs 23 which are clamped against the air distributor tube 1 by claws 24, these claws being fixed to the tube 1 by screws 25 which are screwed into tapped bores in the wall of the tube 1. This method of attachment allows both easy disassembly of the flame guide 20 and low heat transmission of the guide flame to the air distributor tube. It also makes it possible to have a joint between these two elements, if necessary. It also allows different expansions of the flame guide and the distributor tube 1.

Comme les injecteurs sont relativement proches les uns des autres et que la zone de combustion 21 s'étend sur toute la longueur du guide-flamme 20, l'allumage du mélange de gaz et d'air peut s'effectuer au moyen d'une seule bougie 26 disposée approximativement au milieu de la longueur du guide-flamme. Comme le montre la figure 2, la bougie 26 comporte de manière connue un corps 27 et deux électrodes 28 et 29. Le corps 27 est vissé dans un alésage taraudé à travers l'une des parois latérales du guide-flamme 20, de telle manière que les électrodes 28 et 29 se trouvent en face d'un injecteur de mélange air/gaz. A l'extérieur du guide-flamme 20, la bougie 26 est reliée à une alimentation électrique à haute tension 26'.As the injectors are relatively close to each other and the combustion zone 21 extends over the entire length of the flame guide 20, the ignition of the gas and air mixture can be carried out by means of a single candle 26 disposed approximately in the middle of the length of the flame guide. As shown in FIG. 2, the spark plug 26 comprises in a known manner a body 27 and two electrodes 28 and 29. The body 27 is screwed into a threaded bore through one of the side walls of the flame guide 20, in such a way that the electrodes 28 and 29 are located opposite an air / gas mixture injector. Outside the flame guide 20, the spark plug 26 is connected to a high voltage electrical supply 26 '.

Pour permettre un contrôle automatique et à distance de l'allumage et de la stabilité de la flamme, le brûleur comporte une cellule de contrôle 30, de type connu en soi, qui est relié par un câble 31 au dispositif de commande. Dans le brûleur linéaire selon l'invention, la cellule de contrôle 30 est orientée selon l'axe longitudinal de la zone de combustion 21. Elle est montée à l'intérieur d'un tube de refroidissement 32 qui est lui-même fixé, par l'intermédiaire d'un manchon fileté 33, à un tube 34 fixé dans une ouverture d'extrémité du guide-flamme 20. Pour protéger des gaz brûlants la cellule 30, un disque de quartz 35 est inséré à l'intérieur du manchon 33. Le tube de refroidissement 32 comporte des orifices d'entrée d'air 36 et un évent vertical 37, disposés de manière à produire une circulation naturelle de l'air autour de la cellule 30 quand elle s'échauffe. Le contrôle de flamme peut également être assuré par une électrode d'ionisation suivant la méthode usuelle.To allow automatic and remote control of the ignition and of the stability of the flame, the burner comprises a control cell 30, of a type known per se, which is connected by a cable 31 to the control device. In the linear burner according to the invention, the control cell 30 is oriented along the longitudinal axis of the combustion zone 21. It is mounted inside a cooling tube 32 which is itself fixed, by through a threaded sleeve 33, to a tube 34 fixed in an end opening of the flame guide 20. To protect the cell 30 from hot gases, a quartz disk 35 is inserted inside the sleeve 33 The cooling tube 32 has air inlet holes 36 and a vertical vent 37, arranged so as to produce a natural circulation of air around the cell 30 when it heats up. The flame control can also be ensured by an ionization electrode according to the usual method.

La figure 3 montre plus en détail la réalisation des injecteurs d'air 2 et de gaz 9 utilisés dans le brûleur linéaire décrit ci-dessus. L'injecteur de gaz 9 comporte un tube d'acier 40 dont une extrémité 41 est vissée dans un orifice taraudé dans la paroi du tube distributeur de gaz 8. Sur l'autre extrémité du tube 40 est vissée une tête 42 de type connu, comportant deux éléments 43 et 44 assemblés au moyen de filetages et entre lesquels est ménagée une fente circulaire 45 pour l'échappement du gaz. La disposition relative des injecteurs 2 et 42 permet un mélange homogène de l'air et du gaz.Figure 3 shows in more detail the embodiment of the air injectors 2 and gas 9 used in the linear burner described above. The injec gas tor 9 comprises a steel tube 40, one end 41 of which is screwed into a threaded orifice in the wall of the gas distributor tube 8. On the other end of the tube 40 is screwed a head 42 of known type, comprising two elements 43 and 44 assembled by means of threads and between which is formed a circular slot 45 for the exhaust of the gas. The relative arrangement of the injectors 2 and 42 allows a homogeneous mixture of air and gas.

Comme mentionné plus haut, l'injecteur d'air 2 est simplement constitué par un tube d'acier vissé dans la paroi du tube distributeur d'air 1. L'injecteur d'air 2 est disposé coaxialement avec l'injecteur de gaz 9, de sorte qu'il subsiste entre eux un intervalle annulaire 46 pour le passage de l'air. Afin de provoquer une turbulence intense de l'air à la sortie de l'injecteur et de favoriser ainsi son mélange avec le gaz, une bague 47 pourvue d'ailettes radiales 48 de forme appropriée est disposée dans l'intervalle annulaire 46. Cette bague annulaire 47 est maintenue en place par deux épaulements respectifs du tube 40 et de la tête 42. Elle sert également d'organe de centrage de l'injecteur de gaz 9 dans l'injecteur d'air 2.As mentioned above, the air injector 2 simply consists of a steel tube screwed into the wall of the air distributor tube 1. The air injector 2 is arranged coaxially with the gas injector 9 , so that there remains between them an annular gap 46 for the passage of air. In order to cause an intense turbulence of the air at the outlet of the injector and thus to favor its mixing with the gas, a ring 47 provided with radial fins 48 of suitable shape is placed in the annular gap 46. This ring annular 47 is held in place by two respective shoulders of the tube 40 and of the head 42. It also serves as a centering member for the gas injector 9 in the air injector 2.

On peut remarquer que la construction décrite ci-dessus du brûleur selon l'invention est particulièrement simple et peut être réalisée à partir d'élément peu coûteux et disponibles couramment dans le commerce. En particulier, les tubes utilisés pour réaliser les tubes de distribution 1 et 8, ainsi que les éléments tubulaires 2 et 40 des injecteurs, sont de préférence des tubes d'acier d'une série standard. De même, les têtes 42 des injecteurs de gaz 9 peuvent être des éléments existant dans le commerce.It can be noted that the construction described above of the burner according to the invention is particularly simple and can be produced from inexpensive elements which are currently commercially available. In particular, the tubes used to make the distribution tubes 1 and 8, as well as the tubular elements 2 and 40 of the injectors, are preferably steel tubes of a standard series. Likewise, the heads 42 of the gas injectors 9 can be elements existing on the market.

D'autre part, le brûleur décrit ci-dessus est agencé pour permettre un démontage très facile du tube distributeur 8 et des injecteurs de gaz fixés sur celui-ci. Dans ce but, la longueur des éléments tubulaires 40 des injecteurs de gaz (figure 3) est déterminée de telle manière que la dimension transversale maximale du bloc constitué par le tube distributeur de gaz 8 et les éléments tubulaires 40 soit inférieure au diamètre intérieur du tube distributeur d'air 1. Ainsi, après avoir enlevé les têtes 42 des injecteurs de gaz et le bouchon 3 du tube distributeur d'air (figure 1), on peut débrancher le tube distributeur de gaz 8 du raccord 12, puis enlever les écrous extérieurs 17 des tiges de support 16, ce qui permet d'extraire facilement l'ensemble du tube 8 et de ses injecteurs 9. Après opération d'entretien, cet ensemble peut être remis en place sans difficulté.On the other hand, the burner described above is arranged to allow very easy disassembly of the distributor tube 8 and the gas injectors fixed thereon. For this purpose, the length of the tubular elements 40 of the gas injectors (FIG. 3) is determined in such a way that the maximum transverse dimension of the block constituted by the gas distributor tube 8 and the tubular elements 40 is less than the inside diameter of the tube. air distributor 1. So, after removing the heads 42 of the gas injectors and the plug 3 of the air distributor tube (Figure 1), you can disconnect the gas distributor tube 8 from the fitting 12, then remove the external nuts 17 from the support rods 16, which allows 'easily extract the assembly of the tube 8 and its injectors 9. After maintenance operation, this assembly can be replaced without difficulty.

Grâce aux circuits respectifs simples et directs formés par les tubes distributeurs d'air et de gaz, les pertes de charge dans ces organes de distribution sont faibles. De ce fait, une répartition uniforme de l'air et du gaz le long de la rangée d'injecteurs est assurée. En outre, grâce à la création d'une flamme linéaire unique à l'intérieur du guide-flamme, la chaleur produite est parfaitement répartie le long du brûleur. D'autre part, le brûleur linéaire selon l'invention peut être commandé par les moyens connus utilisés pour commander les brûleurs ponctuels. De préférence, on prévoit un dispositif d'asservissement de la vanne de réglage du débit de gaz à la vanne de réglage du débit d'air, ainsi qu'éventuellement à un débitmètre monté sur l'alimentation en gaz, en amont de la vanne de réglage. Ce dispositif d'asservissement est agencé pour maintenir un rapport constant entre le débit de gaz et le débit d'air, afin d'obtenir une combustion optimale. De cette manière, on peut régler la puissance du brûleur en agissant uniquement sur la vanne de réglage du débit d'air.Thanks to the respective simple and direct circuits formed by the air and gas distributor tubes, the pressure drops in these distribution members are low. Therefore, a uniform distribution of air and gas along the row of injectors is ensured. In addition, thanks to the creation of a single linear flame inside the flame guide, the heat produced is perfectly distributed along the burner. On the other hand, the linear burner according to the invention can be controlled by the known means used to control the point burners. Preferably, a device is provided for controlling the gas flow control valve to the air flow control valve, as well as possibly to a flow meter mounted on the gas supply, upstream of the valve. adjustment. This servo device is arranged to maintain a constant ratio between the gas flow and the air flow, in order to obtain optimal combustion. In this way, the power of the burner can be adjusted by acting only on the air flow control valve.

La figure 4 représente en coupe transversale une forme de réalisation comportant quelques modifications par rapport à l'exemple décrit plus haut. La disposition générale des éléments est inchangée, mais la forme et le mode de fixation des injecteurs, du guide-flamme et de la bougie d'allumage sont différents. Le tube distributeur de gaz 8 porte des injecteurs de gaz 49 qui sont plus courts que dans le cas précédent et qui comportent un élément tubulaire 50, vissé sur le tube 8, et une tête 52 analogue dans son principe à la tête 42 décrite plus haut. Un injecteur d'air 60 est formé par un élément tubulaire pourvu à sa base d'une collerette 61 qui permet de positionner simplement l'injecteur 60 emboîté dans un alésage 62 de la paroi du tube distributeur d'air 1. Les collerettes 61 d'une rangée d'injecteurs d'air 60 sont maintenues de chaque côté du brûleur par un profilé de serrage 63 fixé au tube 1 par des boulons 64. L'intérieur de l'injecteur d'air 60 présente un épaulement 65, destiné à retenir une rondelle de turbulence 57 dans le conduit annulaire 56 délimité par les deux injecteurs, et une partie supérieure évasée 66 qui est prolongée par le guide-flamme 70 entourant la zone de combustion 71.Figure 4 shows in cross section an embodiment with some modifications compared to the example described above. The general arrangement of the elements is unchanged, but the shape and the method of fixing the injectors, the flame guide and the spark plug are different. The gas distributor tube 8 carries gas injectors 49 which are shorter than in the previous case and which comprise a tubular element 50, screwed onto the tube 8, and a head 52 similar in principle to the head 42 described above. . An air injector 60 is formed by a tubular element provided at its base with a flange 61 which makes it possible to simply position the injector 60 fitted into a bore 62 of the wall of the air distributor tube 1. The flanges 61 d a row of air injectors 60 are maintained on each side of the burner by a clamping profile 63 fixed to the tube 1 by bolts 64. The interior of the air injector 60 has a shoulder 65, intended to retain a swirl washer 57 in the annular duct 56 delimited by the two injectors, and a flared upper part 66 which is extended by the flame guide 70 surrounding the combustion zone 71.

Le guide-flamme est muni de pattes d'appui 73 qui sont serrées sur les profilés 63 au moyen de vis 74. Ainsi, la transmission de chaleur du guide-flamme 70 aux tubes 1 et 8 est très réduite. D'autre part, le guide-flamme est équipé d'un support réglable 75 pour une électrode d'allumage 76 et pour une électrode d'ionisation 77, en lieu et place de la bougie 26 mentionnée plus haut.The flame guide is provided with support legs 73 which are tightened on the profiles 63 by means of screws 74. Thus, the heat transmission from the flame guide 70 to the tubes 1 and 8 is very reduced. On the other hand, the flame guide is equipped with an adjustable support 75 for an ignition electrode 76 and for an ionization electrode 77, in place of the spark plug 26 mentioned above.

Dans cette forme de réalisation, l'injecteur de gaz 49 est suffisamment court pour que la dimension transversale maximale H du bloc constitué par le tube distributeur de gaz 8 et les injecteurs 49 complets soit plus petite que le diamètre intérieur du tube distributeur d'air 1 et permette donc d'extraire directement toute la rangée d'injecteurs 49 à travers le tube 1. D'autre part, le démontage des injecteurs d'air 60 est aussi particulièrement aisé.In this embodiment, the gas injector 49 is short enough so that the maximum transverse dimension H of the block constituted by the gas distributor tube 8 and the complete injectors 49 is smaller than the inside diameter of the air distributor tube 1 and therefore allows the entire row of injectors 49 to be extracted directly through the tube 1. On the other hand, the disassembly of the air injectors 60 is also particularly easy.

Claims (10)

1. Brûleur linéaire à gaz et à air soufflé, comportant plusieurs injecteurs disposés à l'entrée d'une zone de combustion, un tube distributeur d'air (1) raccordé à une alimentation en air sous pression, un tube distributeur de gaz (8) monté à l'intérieur du tube distributeur d'air et raccordé à une alimentation en gaz sous pression, lesdits injecteurs comprenant une rangée d'injecteurs de gaz (9, 49) répartis le long du tube distributeur de gaz et raccordés à ce tube, et des injecteurs d'air (2, 60) disposés coaxialement autour des injecteurs de gaz et raccordés au tube distributeur d'air, les injecteurs de gaz et les injecteurs d'air comportant respectivement des éléments tubulaires (2, 40, 50, 60) fixés au tube distributeur correspondant, ces éléments respectifs étant disposés coaxialement de façon à définir un conduit annulaire (46, 56) entre eux pour le passage de l'air, caractérisé en ce que lune des extrémités du tube distributeur d'air (1) est raccordée à l'alimentation en air sous pression (6) et sa seconde extrémité est obturée par un bouchon démontable (3), en ce que le tube distributeur de gaz comporte deux tiges de support (16) qui sont disposées parallèlement aux injecteurs de gaz et qui sont fixées par des moyens démontables (17) à la paroi du tube distributeur d'air, et en ce que la dimension transversale maximale du tube distributeur de gaz (8) avec les éléments tubulaires (40, 50, 52) des injecteurs de gaz est inférieure au diamètre intérieur du tube distributeur d'air, de manière à permettre l'introduction et le retrait du tube distributeur de gaz avec ses injecteurs par la seconde extrémité du tube distributeur d'air.1. Linear gas and blown air burner, comprising several injectors arranged at the entrance to a combustion zone, an air distributor tube (1) connected to a pressurized air supply, a gas distributor tube ( 8) mounted inside the air distributor tube and connected to a pressurized gas supply, said injectors comprising a row of gas injectors (9, 49) distributed along the gas distributor tube and connected to it tube, and air injectors (2, 60) arranged coaxially around the gas injectors and connected to the air distributor tube, the gas injectors and the air injectors respectively comprising tubular elements (2, 40, 50 , 60) fixed to the corresponding distributor tube, these respective elements being arranged coaxially so as to define an annular duct (46, 56) between them for the passage of air, characterized in that one of the ends of the air distributor tube (1) is connected to the air supply s ou pressure (6) and its second end is closed by a removable plug (3), in that the gas distributor tube comprises two support rods (16) which are arranged parallel to the gas injectors and which are fixed by means removable (17) to the wall of the air distributor tube, and in that the maximum transverse dimension of the gas distributor tube (8) with the tubular elements (40, 50, 52) of the gas injectors is less than the internal diameter of the air distributor tube, so as to allow the introduction and removal of the gas distributor tube with its injectors through the second end of the air distributor tube. 2. Brûleur linéaire selon la revendication 1, caractérisé en ce que la dimension transversale maximale (H) du tube distributeur de gaz (8) avec les injecteurs de gaz (49) au complet est inférieure au diamètre intérieur du tube distributeur d'air (1).2. Linear burner according to claim 1, characterized in that the maximum transverse dimension (H) of the gas distributor tube (8) with the gas injectors (49) in its entirety is less than the internal diameter of the air distributor tube ( 1). 3. Brûleur linéaire selon la revendication 1, caractérisé en ce que lesdits moyens démontables comportent des écrous (17) vissés sur les tiges de support et disposés à l'extérieur du tube distributeur d'air.3. Linear burner according to claim 1, characterized in that said removable means comprise nuts (17) screwed onto the support rods and arranged outside the air distributor tube. 4. Brûleur linéaire selon la revendication 1, caractérisé en ce qu'il comprend des éléments modulaires assemblés bout-à-bout pour constituer les tubes distributeurs d'air et de gaz (1 et 8).4. Linear burner according to claim 1, characterized in that it comprises modular elements assembled end-to-end to form the air and gas distributor tubes (1 and 8). 5. Brûleur linéaire selon la revendication 1, caractérisé en ce qu'il comporte un guide-flamme (20, 70) constitué par une enveloppe entourant la rangée d'injecteurs et la zone de combustion, en ce que ce guide-flamme est monté sur le tube distributeur d'air (1) et en ce qu'il est ouvert uniquement du côté opposé à ce tube.5. Linear burner according to claim 1, characterized in that it comprises a flame guide (20, 70) constituted by an envelope surrounding the row of injectors and the combustion zone, in that this flame guide is mounted on the air distributor tube (1) and in that it is open only on the side opposite this tube. 6. Brûleur linéaire selon la revendication 5, caractérisé en ce que le guide-flamme est réalisé en métal réfractaire et comporte des pattes d'appui (23, 73), ces pattes étant maintenues par des vis sur le tube distributeur d'air (1) ou sur des éléments (63) solidaires de ce tube.6. Linear burner according to claim 5, characterized in that the flame guide is made of refractory metal and has support legs (23, 73), these legs being held by screws on the air distributor tube ( 1) or on elements (63) integral with this tube. 7. Brûleur linéaire selon la revendication 5 caractérisé,en ce qu'il comporte une seule paire d'électrodes d'allumage (28, 29, 76, 77) montées dans le guide-flamme, approximativement au milieu de la longueur de celui-ci.7. Linear burner according to claim 5 characterized in that it comprises a single pair of ignition electrodes (28, 29, 76, 77) mounted in the flame guide, approximately in the middle of the length thereof. this. 8. Brûleur linéaire selon la revendication 5, caractérisé en ce qu'il comporte une cellule de contrôle de flamme (30), montée à une extrémité du guide-flamme.8. Linear burner according to claim 5, characterized in that it comprises a flame control cell (30), mounted at one end of the flame guide. 9. Brûleur linéaire selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte une vanne de réglage du débit d'air sur l'alimentation en air (6) et une vanne de réglage du débit de gaz sur l'alimentation en gaz (7).9. Linear burner according to any one of the preceding claims, characterized in that it comprises a valve for adjusting the air flow rate on the air supply (6) and a valve for adjusting the gas flow rate on the gas supply (7). 10. Brûleur linéaire selon la revendication 9, caractérisé en ce qu'il comporte un dispositif d'asservissement du débit de gaz au débit d'air, par asservissement de la vanne de réglage du débit de gaz à la vanne de réglage du débit d'air et/ou à un débitmètre monté sur l'alimentation en gaz.10. Linear burner according to claim 9, characterized in that it comprises a device for controlling the flow of gas to the air flow, by slaving the valve for adjusting the gas flow to the valve for adjusting the flow d air and / or to a flow meter mounted on the gas supply.
EP86440004A 1985-01-15 1986-01-14 Linear gas burner having air blown into it Expired EP0190091B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86440004T ATE33068T1 (en) 1985-01-15 1986-01-14 GAS BAR BURNER WITH MECHANICAL AIR FEED.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8500621 1985-01-15
FR8500621A FR2576087A1 (en) 1985-01-15 1985-01-15 LINEAR BURNER WITH GAS AND AIR BLOW

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EP0190091A1 true EP0190091A1 (en) 1986-08-06
EP0190091B1 EP0190091B1 (en) 1988-03-16

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EP86440004A Expired EP0190091B1 (en) 1985-01-15 1986-01-14 Linear gas burner having air blown into it

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EP (1) EP0190091B1 (en)
AT (1) ATE33068T1 (en)
DE (1) DE3660038D1 (en)
FR (1) FR2576087A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990007680A1 (en) * 1989-01-06 1990-07-12 Michel Coulon Linear gas-burner with adjustable width
EP0234447B1 (en) * 1986-02-19 1990-10-31 Ppg Industries, Inc. Burner design for melting glass batch and the like

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US2626656A (en) * 1947-04-16 1953-01-27 De Witt H Wyatt Gas burner and internal baffle for gas distribution
US3170443A (en) * 1963-04-29 1965-02-23 Eclipse Fuel Eng Co Inter-tube gas burner for a coal or oil-fired waterwall boiler
DE1903622A1 (en) * 1969-01-24 1970-12-10 Vits Maschinenfabrik Gmbh Burner that can be regulated within wide limits for operation with fuel gas and air
US3799747A (en) * 1968-04-27 1974-03-26 Metallgesellschaft Ag Fuel burner system for a fluidized bed
FR2511478A1 (en) * 1981-08-12 1983-02-18 Eclipse BURNER WITH GAS MIX

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR957032A (en) * 1950-02-13
US2626656A (en) * 1947-04-16 1953-01-27 De Witt H Wyatt Gas burner and internal baffle for gas distribution
US3170443A (en) * 1963-04-29 1965-02-23 Eclipse Fuel Eng Co Inter-tube gas burner for a coal or oil-fired waterwall boiler
US3799747A (en) * 1968-04-27 1974-03-26 Metallgesellschaft Ag Fuel burner system for a fluidized bed
DE1903622A1 (en) * 1969-01-24 1970-12-10 Vits Maschinenfabrik Gmbh Burner that can be regulated within wide limits for operation with fuel gas and air
FR2511478A1 (en) * 1981-08-12 1983-02-18 Eclipse BURNER WITH GAS MIX

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
P. HOSTALIER: "Les brûleurs industriels a gaz", 1970, pages 129 et 337, Editions Eyrolles, Paris, FR *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0234447B1 (en) * 1986-02-19 1990-10-31 Ppg Industries, Inc. Burner design for melting glass batch and the like
WO1990007680A1 (en) * 1989-01-06 1990-07-12 Michel Coulon Linear gas-burner with adjustable width
FR2641601A1 (en) * 1989-01-06 1990-07-13 Coulon Michel LINEAR GAS BURNER HAVING ADJUSTABLE WIDTH

Also Published As

Publication number Publication date
FR2576087A1 (en) 1986-07-18
EP0190091B1 (en) 1988-03-16
DE3660038D1 (en) 1988-04-21
ATE33068T1 (en) 1988-04-15

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