DE2047457A1 - Process for generating heating gases and burners for carrying out the process - Google Patents

Description

PATENT Attorney App. File: 1-32G

Dipl.-Ing. Wolfgang K. Rauh

51 AACHEN ^ 0 A 7 4 5

Krefelder Strasse 35 · Telephone 36452

PATENT APPLICATION

Applicant: International Industries Limited,

Burnaby, British Columbia, Canada

Priority: Great Britain, Nr _e 49 496,

October 8, 1969

Designation: V / experienced for the production of heating gases and burner for carrying out the method.

The invention relates to a method for generating a heating gas and a burner for carrying out the method.

In many households, oil-fired water heaters are used used, partly because of the design of their burners and partly because of the fact that the fuel oil is used and the combustion air, which together form the combustible mixture result, are fed to such burners under considerable pressure, do not work economically. The combustion chambers most of the boilers used in households are considerably smaller than those of, for example, commercial ones operated water heating systems.

As a result, the fuel is in these combustion chambers introduced before being sufficiently preheated and adequately has been mixed in order to achieve maximum noise output

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bring. For a high pressure burner it is necessary that the associated combustion chamber is provided with a refractory lining. To keep the burn going, this lining must be kept glowing. However, since the need for heating water is relatively low and not it is often that such tirenners work with proportionately long time intervals and then usually only for one short duration. Accordingly, the burner must every time when it is operated, it can be brought to a working temperature that allows the fuel to burn properly permitted. However, prolonged heating reduces the efficiency of such burners because of the refractory lining material surrounding them is not made to glow every time, so that the usual hot water generating devices and especially those for household purposes considerably below work at the most favorable efficiency, both from an economic point of view and in terms of the frequency of burning that is necessary to make one uneconomical keep working burner clean.

The method according to the invention is intended to avoid these disadvantages and enable economical operation of a burner for household purposes as well.

The inventive method consists in that at the beginning and longitudinal direction from a fuel source a relative long tongue of ignited fuel into one of

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The distant main combustion zone is driven so that a part of this fuel tongue forms a countercurrent flowing back to the fuel source, the point of origin of which is between the fuel source and the main combustion zone, the main combustion zone being kept farther away from the fuel source than the point of origin of the countercurrent the counter-flow near the source of fuel back into the fuel Λ tongue is inserted, that the flame of the fuel tongue is cleared as soon as a sufficient increase in ambient temperature is reached, that substantially concurrently herewith at the source of the counterflow a blue flame is produced and that there is sufficient Combustion air is introduced.

Another characteristic of this process is the formation of a counter-flow, which is formed from part of the fuel tongue and returned to its place of origin. This counter-flow is ^{to be} compared to some extent with a fountain or a fountain, forming a Hing of beams around a central ray, said Hückströmung however, extends horizontally. This counterflow is reintroduced into the fuel tongue near the fuel source.

The next important feature of the invention is after that, a sufficient rise in the ambient temperature appears the flame formed by the fuel tongue

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20th

delete or disconnect from the injector. this happens by switching off an ignition electrode, which is next to the injection nozzle is arranged. When extinguished, the flame leaves the vicinity of the injection nozzle and travels along the burner to the main focal point, there are a multitude of clear blue ones and forms uniform flame beams. At the same time, a band more similar to the counterflow forms at the point of origin clear blue flames.

While the fuel tongue moves generally horizontally, the blue flames enter the combustion chamber at right angles to the top at the end. As a result, can one after the burner has been brought to full combustion output ωόrden is only a horizontal one in the combustion chamber Identify disk with blue flames pointing upwards.

The burner for performing this method consists of one inner burner tube, a housing surrounding this at a distance, a lens spray nozzle assembly, an ignition electrode, adequate air supply facilities and a burner head and is characterized by the fact that the burner head is on the front end of the ^ rennerrohres is arranged that between the burner head and the injection nozzle arrangement by means of Generation of a counterflow from part of the spray nozzle arrangement used by the L i η into the burner tube, a long

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elongated tongue forming fuel are provided that IYIi11el to return the "countercurrent to the burner tube near the t-injector nozzle assembly are provided and that a device for extinguishing the in the burner tube inflamed fuel tongue is provided.

The burner can process any fuel from kerosene to heating oil without any change in setting. A me- ä term feature of this örenners is that he is working with atmospheric pressure and no forced train required effect. The only place where a small amount of air is supplied under pressure is the injection nozzle arrangement, where the pressure is usually 0.7 atm. This is only necessary to drive air-mixed particles from the igniter into the burner.

t-one particular advantage of the burner is to be seen in that it works at start-up and operation with noise levels that are known to be low-noise compared to existing ones Gas heating systems are low. The burner according to the invention can be used against its high mus-yield also compare favorably with gas burners in terms of consumption costs.

There is another advantage of the burner according to the invention in that it works at atmospheric pressure, i.e. with natural pull, which avoids one of the greatest problems that occurs with burners. This problem persists

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namely in an accumulation of dust and crusts on the fan blades of a blower. Also the accumulation such substances on parts that surround or are in the vicinity of the fan, and thereby the entry of air is reduced in the burner. Furthermore, clogging of the burner openings is also involved Crust and incompletely burned oil residues as a result of the wake of the fan blades connected, ujodurch also adversely affects the combustion in the burner itself will.

It is also advantageous in the case of the burner according to the invention his extremely quiet work, which also makes him suitable for over-firing, especially when the burner plates are rectangular instead of circular used in conjunction with labyrinth heat exchangers (clam-shell heat exchangers), such as them in motor vehicle trailers, cabin cruisers or the like are used and are extremely easy to manufacture and assemble, tuobei they are relatively deep, wide, in Cross-section narrow and more or less corrugated and made up of two similar, connected to each other at their hands Deep-drawn parts or parts exist, between the general three burners can be used.

Another advantage is the arzialbaran efficiency from about 84 / *), together with an almost complete Combustion process, with the exhaust gases only traces of CQ

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and all visible smoke still has soot. Consequently can owing to the low attainable temperature during use A main chimney with a type B ventilation can also be used in a burner according to the invention and was previously only permitted for gas firing.

It is also advantageous that the amount of fuel in the burner tube is ignited. "

Further advantages are that the burner can easily be exchanged for an existing burner, can be expanded quickly and without effort, the maintenance costs can be kept low and, because of the very small number of moving parts, it is also very wear-resistant. An injection nozzle is expediently used, the opening of which is considerably larger than is the case with conventional nozzles. As a result, there is a relatively cool Üüsentemperatur whereby λ also clogging of the nozzle is avoided. The injection nozzle arrangement can be located outside the combustion chamber, and thus remote from the heat zone, so that for this reason too the nozzle is not exposed to any rapid wear. There is also no need for a combustion chamber with a refractory lining or made of stainless steel, so that the result is low weight, low price and low maintenance costs »

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After all, the buyer of the burner is not forced to To make Ausqabun for a blower. This is hardly possible either saved, which is especially important for household systems.

A practical embodiment of the renner consists in that the housing has a front and a rear end wall and, together with the burner tube, forms a counterflow chamber which surrounds the burner tube, which receives fuel at its rear end and releases it at its front end the rear end wall opposite the injection nozzle arrangement extends from the housing to the burner tube, so that the burner tube has a gas outlet opening at the front end of the housing, which leads to the outside of the counterflow chamber, that the front end wall is essentially imperforate, but has at least one opening that is limited volume takes in to countercurrent air into the counterflow chamber, that the combustion tube is longer protrudes when the housing and through an enlarged concentric Üffnung in the front end wall that the torch Ruhr beside the end walls Uerbindungsstellen for the counterflow which the Burn formed from the ^u renner pipe ungsprodukt s consists, and that the burner head sits on the front end of the burner tube, outside of the housing.

The connection point for the countercurrents is advantageous near the front end wall of a ring

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Shaped band or jacket part of the separator tube provided with a large number of holes, the connection point for the counterflow near the rear end wall from an annular space between the rear end of the burner tube and the rear end wall of the housing and from an annular space provided with a large number of openings fflantelteil band or between the burner pipe and the countercurrent flow chamber near the rear UJan- like extension of the housing.

A further embodiment of the burner according to the invention is that the rear part of the end wall has an inlet opening for combustion air and that on Edge of this inlet opening on the rear side of this Front wall a conical funnel is attached, into which the injection nozzle assembly and the ignition electrode protrude «

The burner is advantageous on the wall of a combustion chamber attached and protrudes into this and advantageous are adjustable devices outside of this wall for the supply of combustion air into the interior of the combustion chamber and the funnel, the combustion air partially lead to the outside of the housing.

Another feature of the invention is that with a small distance behind the front end wall of the housing

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in the counterflow chamber one with a large number of through bearings provided air distribution plate arranged is.

It is also advantageous if the "burner head on the front End of the burner tube is attached and has an outwardly expanding shape and when on the edge of the Burner head at least one with many through holes See the burner nozzle plate that covers the burner head.

To prevent the fuel tongue from flaring up again, a flame-retardant wall is also provided with openings and extends between the burner tube and the housing extends and located near the rear ends of the burner tube bzuu of the housing.

In the drawing are exemplary embodiments of the invention reproduced, namely show:

Fig. 1 is a plan view of the invention burner

Fig. 2 is a vertical longitudinal section according to the line 2 - 2 in FIG. 1

Figure 3 is a right side elevational view from (■ ig, 2

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fig · 4 is a plan view of a built-in one

Oil burner and the combustion chamber surrounding it

Fi q. "A representation of the I la mm en men it directly after ignition

("in. 6 a representation according to fig. 5 etiua

6Ü - 9Ü seconds after ignition g

F i η. 7 a circuit diagram detail is one example Means to extinguish the flame, iiienn a sufficient rise in the ambient temperature exceeded.

In the F iq _0, identical or similar parts are designated by like reference numerals.

In general, the burner consists of a burner tube A with a front end C and a rear end E. uieses burner tube A is in a cylindrical housing B. arranged that surrounds the burner tube A at a distance. His v / orderen bzui. rear ends are marked with D bzuf. F. designated and by end walls Kbzuj. L completed.

Uas the front end C of the burner tube A protrudes through a central one Opening of the end wall K in front and ends in a burner head 3 arranged at right angles thereto.

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Within the housing B mostly the torennerrohr close to the Ends of the housing B each have a strap or a flange part (Kl or 1 \ l on, which is provided with a plurality of won holes.

The housing B and the burner tube A ″ together form one the burner tube A ring-shaped counter-flow chamber 0 for a direction opposite to the alloeweioein direction of propagation of the fuel running counterflow P of ignited fuel gas.

In general, the direction of propagation of the fuel is determined by an injection nozzle arrangement ¹ ^ at the rear end F of the housing B, from which a quantity of fuel gas flows through the burner tube A and can be ignited by an ignition electrode H arranged in the area of the injection nozzle arrangement G.

The place of origin R of the countercurrent P is between the burner head 3 and the injection nozzle assembly G. The countercurrent P flows to dew at the rear end E of the burner tube A located perforated flange part N and an annular Rau «S passed.

Furthermore, the burner usually has a thermostat-controlled device with which the fuel tongue U, which has ignited after the framing, is extinguished as soon as the ambient temperature is reached

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has risen sufficiently high and evaporation of the fuel can be caused. At the same time this should Device cause that at Lnis tehungsar t R of the countercurrent P as well as in the main combustion zone U above the burner head 3 a blue flame T is generated. The main combustion zone U is further away from the injection nozzle arrangement G as the point of origin R of the countercurrent P.

About burner 10 is on the wall L2 of a usual, him surrounding combustion chamber 14 attached so that it is in this WcJ age protrudes right into it.

In addition to the above-mentioned parts, namely the burner tube A, the housing U _{1 of} the injection nozzle assembly G and the ignition electrode H, the burner 10 has the following additional features »

The front end 16 of the housing B is delimited by a closed end wall 20, the rear end 18 by a closed end wall 22. Between these Stirnu / AEN; len 20, 22, the v / om housing B is 24 of the burner tube A as well as the somewhat longer counter-current chamber U, which, as F ig, Figure 2, has an annular Uuer-sectional "enclosed portion

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2 O 4 7 Λ 5

The Stirnuiän-de 20, 22 only have a central one Opening 26 bziu. 28 on. Through the opening 26 protrudes with Pass the ürennerrohr A with sufficient play and help det with the end wall 20 a concentric opening 3Π to support the combustion,

The opening 28 located in the rear end wall 22 serves as an inlet opening for the fuel, which forms an elongated ^ü ^ ennstoffzungfe Q in the burner pipe A '

On the outside of the combustion chamber 14 is on the circumference of the

»
Opening 28 a frustoconical funnel 32 attached, in which the injection nozzle assembly G and the ignition 1 ek trotie H are housed.

The burner head 3 has the shape of an approximately circular sink. Its edge is spanned by two rotating nozzle plates 34 which are arranged at a small distance one above the other and provided with many holes. The burner tube A is held centrally in the housing B, two disk rings, of which one disk ring is arranged at a short distance from the end wall 20 of the counterflow chamber 0 and forms a perforated air tv / ertei lerp 1 atte 36, the other disk ring is one on the burner tube A and attached to the housing B flame retardant plate 3B, which should avoid reignition of the fuel tongue Lj v / after this

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is extinguished and evaporated.

The connection between the interior of ^the burner pipe and the counterflow chamber 0 is made by means of a front sleeve part 40, a rear sleeve part 42 and an annular space 44. The ring-shaped fiauitn is located between the rear end E of the ^ß ren-. g nerrohres Ä and the rear end wall L of the housing B.

In the nozzle plates 34, a pair are fluid with each other central, relatively large openings 48 arranged.

The opposite ends D, f of the housing B, which in all practical cases also with the Ulandung oer Combustion chamber match, are overlapped by flanges 50. On the outside of the combustion chamber wall 12, i.e. ™ in Fig. 2 to the right of this wall, are adjustable means 52 for changing the combustion air inlet into the interior of the burner tube A and the surrounding area Combustion chamber 14 is provided. These means 52 consist of an annularly outwardly protruding uJand 54 and one Headband 56. The land 54 is a loan by far openings 58 arranged from one another. Over the island 54 lies a bing 60, which has openings of the same Size as the openings 58 is provided and when rotating the

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rtinges 60 qanz or partially with the openings 58 in Jeckunq can be brought. It turns out to be normal Hinged 6ü on the aland 54 by means of a conventional tension ring clamp 62 recorded (r ig “3).

Uurrh actuation of the assigned, not shown This air is pumped at 0.28 to 0.49 atu in

^ the injection nozzle arrangement G introduced, where it is a part

vacuum created, which removes oil from an associated, not The oil pump shown is sucked in and mixed with the air and exits through the opening 28, approximately in the f. level This opening 2B ignites the ignition electrode H the oil-air mixture, creating a long, bright tongue of flame,

which essentially begins at the ignition opening of the injection nozzle and extends brightly through the burner tube A and the burner head 3 . At the same time, an outer ring-shaped layer of the tongue of flame is stripped off, so to speak, and goes through the front lantern part 40 into the area R, where the countercurrent P begins, which flows in the opposite direction through the chimney 0 and through the flame retardant plate 3B and from there goes annularly or radially inwardly through the rear shell portion 42 and through the space Hing ^J to flow back again to the burner head of the burner tube within J A.

The aforementioned process takes about 60 to 90 hours. During this time the ignition electrode H is automatically

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switches. This extinguishes the inflamed fuel tongue U, since under normal operating conditions, after about 60 to 90 minutes, a sufficient rise in the ambient temperature is achieved to vaporize the air mixture extracted from the injection nozzle assembly G. At the same time as the ignition electrode H is switched off, a large number of small blue flame jets are formed on the outer surface of the front casing part 40 as a result of the intake of fresh air according to part 66 through the annular, combustion-promoting opening 30. This additional air is also in the narrow annular Haum 60 distributed, which is located between the imperforate end wall 20 and the perforated Luftverteilerp latte 36, This is a completion of the combustion is supported not only at the point R, but also in the entire adjacent area of the Gecjens tromkammer 0 and to a certain extent at the entire counterflow chamber 0.

At this time, the temperature of the ^above Renner has reached a point where the 01-air mixture immediately after joining behind the opening 28 to gas evaporated luird "

The kinetic energy of the injection nozzle assembly also, as indicated at point 70, draws air through the openings 58 into the funnel 32, where it meets with the

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Ul-Lu Ftq em isch wnrnienqt, Z υ sat ζ borrowed more combustion air by rl ι θ L) FFn u ng 5B, which is at the steep 7 2 Is given to the completion of combustion in the Urennkamm ηr 14 support.

During the first 6 Π to 9 operating seconds, in ο the fuel tongue IJ burns with a bright flame, there is a bright flame that also pervades the counter-flow chamber 0 in the Gerjenstram and in K i r. Ht υ η η on and through the opening nozzle plates 34 migrates and encloses the tip of the flame 74, when the evaporation temperature is reached, the fuel tongue is gaseous and the rhythm which passes through the counterflow chamber is then gaseous (Fig. 6). What is visible when the evaporation temperature is reached is a ring of blue flame rays T and an upper disk of such rays at the main combustion zone 76. The disk is horizontal due to the generally right-angled course of the burner tube A to the burner head 3.

When the burner d iüVerdam'pf ungs tempera door has reached prevail at the upper Hren nozzle plate 34 measured maximum temper a tu run 'ν / on 6UU to 65U ⁰ C. The normal operating temperatures, the ten 2 to 3 Uli in u this Every 1 Ie is reached, but is at 371 to 428 C. In the area of the brackets 78 (FIG. 1) the measured temperatures are between 65 and 760 C and in the area of brackets 81) between 650 and 760 ° C. The normal he-

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10 9 8 17/1 2 9 3 BATH

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trieabstemperaturen, however, are in the range 78 to 538 C and hot in the 455 range BQ hei to Boo ° C and uierden, gesaqt as 583 ', in about two to three ^{| (|.} In the field reaches inutes lip.τ line 82, 84 on the The surface of the housing B measured maximum temperatures of 600 to 650 L to 482 to 583 C. After two to three minutes, these temperatures were approximately 483 to 538 C and 371 to 428 C.

From the above it follows that the hipner according to the invention is a low pressure burner with air suction and atomization. The heating oil is sucked in through the inlet valve of an associated gear oil pump and introduced into the float chamber, which is equipped with a Schwimmerbetät ig th Ulrückl rruf control valve. A connected zero pressure regulator leads from this float chamber to the feed line of the injection nozzle arrangement G _0. An electric motor connected to the oil pump also drives an air pump equipped with blades, which delivers air to the injection nozzle at a pressure of about 0.42 atmospheres. Heating oil is drawn into the icy zone by suction of the atomized primary air. As mentioned earlier, a relatively large injection nozzle is used. The ^ primary oil-air mixture πίί-reaches through a horizontal preheating and evaporation zone, which has already been described in detail, before it is deflected by 90 and through

a diffuser plate or the two outer plates 34 exits and there is ignited. The secondary V / vomitingunqs-

: ·: 109817/1293 BAD ORtQINAL

air continuously through opening 30 around the burner tube A sucked into the counterflow chamber 0.

In one experiment, two water heaters were used with the burner heated. The efficiency was reduced to indirect illegal determined, namely by a flue gas analysis. The test device used was a common Orsat device for lYlessuriq 'of CO « CO and oxygen in flue gases up to a volumetric Accuracy of 0.2% or less.

Because the Orsat device CO is less than 0.1 vol% or about 1000 ppm could not be displayed, a more detailed test was carried out with a CO tester from Bacharach Industrial Instrument Co. carried out. The results showed only traces in the On the order of 1 ppm.

The heating oil used was standard Esso distillate heating oil ASTm Type D-306 Grade No. 2 "

In each of the two tested water heater Murde found that the apparent i / ariationsbBeite was efficiencies well within the possible limits of error, such that with the measurement and calculation efficiency vef- is prevented. ¹ The deviation was less than 1.2 - 1% in the ^u urchschnitt.

The average efficiency for the heater IMr. 1

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was $ 83.8, that for heater No. 2 was $ 83.04 / * ». It resulted a permanent burn with practically undetectable CQ traces in the exhaust gases. These exhaust gases consisted of CCU and water vapor with traces of S0 "and SGr, respectively The fuel used, the exhaust gases were clear and contained no visible smoke or soot deposits. Below are the results of the flue gas analysis and the calculated efficiencies with reference to heater no.

Tabel

Time: 11 , 04 I. 11.15 11.30 13.05 04 13.30 h Trial number: d ■ p 1 2 3 4th Flue gas analysis (s) ω % co ₂ - "c 10.6 10.2 10.4 9.8 % O ₂ - •H 6.8 7.8 8.2 7.8 % CO - UJ oil 0.1 0.1 0.1 Temperature C Surroundings t . ^{2 lO} o 22 ° _o 25 ° 22.8 ° chimney W.
03 199 ° 199 ° 204.5 ° 204.5
7.8 ° Inlet water "D 7.8 ° 7.8 ° 7.8 ° 6oo A u s 1 a ß.w a s s e r U- 60 ° 60 ° 55.9 Excess air % (0 45.3 56.3 61.7 9.07 Breath gas loss % C.
cc 8.34 8.52 8.53 7.21 Comb. H ₂ O VBrIuSt % 7.20 7.19 7.19 0.15 Humidity loss % 0.14 0.15 0.15 1.0 Other losses % (a) 1, -0 1.0 1.0 82.57 Calculate Efficiency 83.32 83.14 83.13 % Average Effective.
Degree 83,

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In this table: the losses a) other losses such as radiation and the like, which are assumed to be 1% , d) the heater runs continuously from the start. The water flow rate is about 1.7 kg / min .; e) the accuracy of the Grsat device is better than 0.2 vol / k.

A conclusion regarding the ürenner leads to that in FIG. 7 shown t-equipment, with which the inflamed fuel tongue Q should be deleted if there is a sufficient increase the ambient temperature has taken place «The circuit diagram is only shown as an example and not as it is Really used as the actual circuit a lot is more complicated because it also includes starting, safety devices and the like, which are used in burners are common.

However, the circuit according to FIG. 7 is sufficient to provide the means for the exact purpose stated above. These Device is housed in a control housing BB, from which a conventional probe 88 protrudes, which can also be arranged to act as a means of extinguishing the inflamed Fuel tongue G) under the circumstances mentioned above

Q can be used both in the application of the probe

00 'for this purpose, as well as the circuit according to FIG. 7, lies within the framework of the skilled ** 3 male ability in this field.

Γ * In view of the above, a grounded

^ Coil '9U on one side - the ignition electrode circuit 92 as a Element in the clean circuit 94 is provided. A bypass circuit 96 is connected to one terminal of the pair of terminals 98-lüü.

With circuit 94 is a bimetallic strip thermostat 102 connected. When the heating coil disconnects the thermostat from the position shown deflects and brings it out of contact with the terminal 98, the circuit 92 is interrupted and the ignition electrode H shut down. As a result, the visible flame of the fuel tongue Q is extinguished and already takes it explained condition to "

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Claims (1)

Claims (1., »learn about the production of a heating gas, since you h characterized in that at the beginning in the longitudinal direction from a fuel source (G) a relative long tongue (Q) of ignited fuel into one of these remote main combustion zone (U) is driven,. that., from <a; - Te 11., this β ε fuel ζ on§e (Q) a in the direction of the fuel source (G) Countercurrent (P) is formed, the place of origin (R) between the fuel source (G) and the main combustion zone (U), where the. Main combustion zone (U) is kept further away from the fuel source (G) than the Entötehort (R) of the countercurrent (P) that the Counterflow (P) near the fuel source (G) again into the fuel tank (Q) that the flame ^ the fuel tongue (Q) is extinguished as soon as sufficient The rise in the ambient temperature has been reached so that essentially at the same time a blue flame (T) is generated at the point of origin (R). Of the countercurrent (P) uiird and that sufficient combustion air is introduced . -S "will. 2, method according to claim 1, characterized in that g ι 4 β η h draws that the countercurrent (P) in addition Air is supplied. 109817/12193 20A7A57 3. The method according to claim 1 or 2, characterized characterized in that at a point (72) close to the fuel source (G) air into the combustion chamber (14) is introduced. 4. The method according to any one of claims 1 to 3, characterized marked that re-ignition the fuel tongue (Q) in the burner tube (A) " .by the counterflow (p) that is fed in, it prevents _o 5. burner for carrying out the method according to one of ^H nsprüche 1 to 4, consisting of an inner burner tube, surrounding it with · Distance housing, an injector assembly, an ignition electrode, sufficient air supply means and a burner head, characterized in that the burner head (J) at the front end (C) of the burner A tube (A) is arranged and that between the burner head (j) and the injection nozzle assembly (G) means (IYl) to generate a countercurrent (P) from one part that is guided by the injection nozzle arrangement (G) into the burner tube (A) and forms an elongated tongue (Q) Fuel are provided that means (N, S) for returning the counterflow (P) into the burner tube (a) near the injection nozzle assembly (g) and that means (92 to 102) for extinguishing the fuel tongue (Q) ignited in the burner tube (A) is provided. 109817/1293 6 «Burner according to claim 5, characterized in that the housing (B) has a front and a rear end wall (K, F) and, together with the burner tube (A), forms a counterflow chamber (θ) which surrounds the burner tube (A), which picks up the fuel at its rear end (E) and discharges it at its front end (C), that the rear end wall (Γ) extends from the housing (B) to the burner tube (A) opposite the injection nozzle assembly (G) tirennerrohr (A) at the front end (K) of the housing (B) has a gas discharge opening (26) which leads to the outside of the counterflow chamber (O), so that the front end wall (K) is essentially imperforate, but at least one opening (26), which lets a limited volume of countercurrent air (66) into the countercurrent chamber (G), that the burner tube (A) is longer than the housing (Β) and through an enlarged concentric opening (30) in the front end wall ( K) protrudes so that the burner tube (A) next to the front wall nd (K; ¹ -) connection points (Bl, N) for the counterflow (P), which consists of the burner tube (A) formed oil / combustion products and that the burner head (j) on the front end (C) of the burner tube (A), and although it sits outside the housing (B) « 109817/1293 7. Burner according to claim 6, characterized in that the connection point (fll, 40) for the counterflow (P) near the front end wall (K) from an annular band or jacket part (40) of the burner tube provided with a multiplicity of holes (46) (A) exists. 8. Burner according to one of claims 6 or 7, characterized in that the connection point (N) (42) for the counterflow (p) near the rear end wall (L) from an annular space (S, 18) between the rear end (E) of the burner tube (A) and the rear end wall (L) of the housing (B). 9 · Device according to one of claims 6 to 8, characterized characterized in that the connection point (N, 42) between the burner tube (A) and the countercurrent chamber (0) near the rear Ulandung (L) of the housing (B) from a wit a plurality of perforations (46) provided annular band or lantern part (N), (42). 10. Burner according to one of Claims 5 to 9, characterized characterized in that the rear end wall (L) has an inlet opening (28) for the combustion air has and that ara edge of this inlet opening (28) on the back of this end wall (L) a conical funnel (32) is attached, into which the injection nozzle arrangement 109817/1293 (G) and the ignition electrode (H) protrude. 11. Burner according to claim 10, d a d ur c h g e k e π η ζ e i c h π e t that the burner 0 (3) at the UJandung (12) is attached to a combustion chamber (14), and that it protrudes into this and that outside of this adjustable devices (52) for supplying combustion air into the interior of the combustion chamber (14)
and the funnel (32) are provided, which partially deliver the combustion air to the outside of the housing
(h) lead. 12. Burner according to one of claims 5 to 11, characterized in that at a small distance behind the v / oren end wall (K) the housing (B) in the counterflow chamber (θ) an air distribution plate (36) seen with a plurality of through holes arranged
is, 13. Burner according to one of claims 5 to 12, characterized in that the burner head (3) is attached to the front end (C) of the burner tube (A) and has an outwardly widening shape and
that on the hand the burner head it (J) at least
a hand nozzle with many through holes 1 U y ö 1 7/1 2 9 3 plate (34) rests, which covers the burner head (3). 14 »Urenner according to claim 13, characterized in that that the burner head (j) is rectangular is attached to the burner tube (A), with the burner head expanding towards the top and the burner nozzle plate (34) is arranged horizontally » 15. Burner according to claim 12 or 13, characterized in that that two parallel burner nozzle plates (34), arranged one above the other with a small distance overstretch the burner head (J]). 16. Burner according to one of claims 5 to 15, since cJ urch characterized in that a ver provided with openings flame retardant plate (3B) is provided which extends between the burner tube (A) and the housing (B) and near the rear ends (E ₁ F) of the burner tube (a) bztu. of the housing (B). For International Industries Limited Dip 1, -1 ng. UJoI / gang K. Hiiuh PATENT ADVOCATE 1098 1 7/1293