DE1529216A1 - Gas burner - Google Patents

Description

DR. BERG DIPL.-ING. STAPF

PATENT LAWYERS 1 R? Q? <f

8 MUNICH 2.HILBLESTRASSE 2O 'V C Cf £ |

Dr. Berg Dipl.-Ing. Stapf, 8 MOnchan 2, Hilblestrofla 20

Your reference Our reference VI / Kr 13 488 Date g

Attorney files No. 13 488

NATIONAI RESEAECH DEVELOPMENT CORPORATION Kingsgate House, 66/74 Victoria Street London, S.W. 1

"Gas burner"

The invention relates to a gas burner which is used to generate a laminar or flat flame and also to itself for burning gaseous fuels with various Burning speeds suitable.

ORIGINAL INSPECTED 9093A6 / 03AS

■ 5T (08Π) "5 U 20 81 telegrams, PATENTEUIE MOnchan Banki Bayarltch · Verainibank MOndien 453100 Poirichacki MOnchan 453 43

New documents (Art 7 11 Para. 2 No. I Sau 3 do = Changes ₀₉ ge _3. Ν. 4. 9.19f.

Conventional gas burners are for use with a particular gaseous fuel at a given thermal Throughput, and a conventional burner, which is suitable for operation with e.g. town gas, is in the generally not suitable for burning another gas, such as methane, with a lower burning rate, because here the flames tend to lift off the flame holders and even go out completely, as a result of which unburned gas flows out of the burner.

To overcome these difficulties, a gas burner has already been created in which a high pressure chamber has a hollow rib, which at its free Edge has holes through which the high pressure gas escapes men should. Low pressure chambers on both sides of the rib are connected to the high pressure chamber through throttle bores and have gas outlet openings at the foot of the rib or at a distance from the rib.

With such a construction, the shape of the high pressure chamber is in the area in front of the outlet openings for the high-pressure gas, the effect that the individual high-pressure flames be spread transversely to the longitudinal direction of the rib. The invention uses this effect in its preferred manner Embodiment also from. "

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The invention creates a burner with the special feature that a common combustion opening for both Main flame or flames and also for the auxiliary flame or flames is provided. The combustion chamber is through Partition walls divided into separate chambers, which are fed with gas of different pressure. One edge the partition extends transversely to the combustion opening and divides the same into sections, which so with the chambers are in communication that the gas flows out of the high pressure chamber through a section and the main flame feeds and the gas flows out of the low pressure chamber through the other section and the auxiliary flame feeds. This arrangement has the advantage that the auxiliary flame is directly adjacent to the main flame and that the The base of the main flame is immediately reignited when the main flame is blown out. In contrast to the known burners is also in the burner according to the invention for the auxiliary flame because of the common relatively large combustion opening for both flames no risk of dissolving, for example due to clogging by soot or Dirt particles.

The invention is based on a gas burner with a gas chamber, the interior of which is divided into separate Chambers is divided, which are in communication with combustion openings in the wall of the chamber and with

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Gas of different pressure are fed, so that a main flame with high pressure gas from the high pressure chamber and an auxiliary flame which self-puffs out the Main flame is intended to prevent being fed with low pressure gas from a low pressure chamber. She is through it characterized in that the division divides a focal opening into different sections, which with different chambers fed with gas of different pressure are in communication, and that the subdivision is arranged so that the high pressure gas of the high pressure chamber of the burner opening in converging currents.

flows, as a result of which the gas spreads in a surface after flowing through the combustion opening, and in shallower Flame burns, so that at least part of the flame base is fed with gas, which through a part the combustion opening flows, which is fed with gas from the low-pressure chamber.

In all known gas burners in which the gas flame is prevented from blowing out automatically with the aid of auxiliary flames is to be, the wall of the gas chamber has a combustion opening for the main flame and at a distance from it the combustion opening for the auxiliary flame. Both burn holes must necessarily have a clear distance from each other, since the two gas to the furnace

909846/0346

mingen leading chambers separating wall on the chamber wall must be welded gas-tight between the two combustion openings. The auxiliary flame is thus at a distance to the main flame. When the latter is lifted, the auxiliary flame can only ignite that part of the gas flow with whom she is in contact. The auxiliary flame can consequently does not contribute to the gas flow of the main combustion opening ignite its outlet, so that the main flame tends to be at gas pressures which cause a self-blowing out of the Cause flame to burn incessantly. In the previously known burners with two separate combustion openings the auxiliary combustion opening is also very small, so that there is a serious risk that this combustion opening can be clogged by soot or dirt particles.

Since the invention in particular burners with a flat main flame layer relates, the partition is advantageously arranged so that the high pressure gas of the combustion opening in converging currents flows, whereby an outflow of the gas takes place from this combustion opening in the Y / ice, that it spreads in a flat layer, which goes laterally beyond the focal opening and with the Communicates area of low pressure. In practice, the two flames combined result in a single one flat flame layer.

909846 / tmS iVNioiyo ava

The combustion opening of the burner according to the invention can through Subdivisions be divided into two sections, which with the high pressure chamber and the Mederdruckkammer in Connected. However, the focal port is preferred symmetrically divided into a central section, which is in communication with the high pressure chamber, and two outer sections, each to the side of the central section are in communication with two low pressure chambers. This arrangement makes it symmetrical Flame created.

In the preferred form of the gas burner according to the invention the gas comes out of the high pressure chamber at high speed through the middle section of the combustion opening, and forms the main part of the flame with its upper part during combustion. The gas from the "two Low pressure chambers emerge at low speed through the outer cords of the combustion port and form when incinerated at least partially the basis of the Flame. If the flame of the gas flowing out at high speed should rise or even go out, it will them through the flame of the emanating at low speed Gas immediately reignited. Thus, the flame remains stable when the burner is used for combustion

of a fuel gas within a wide range of Burning speeds is used. A single burner according to the invention can be used do unpurified or to burn purified fuel gases or vapors, such as methane, propane or butane, gas mixtures with or without Air addition or town gas-oxygen mixtures, oil vapors, also with the addition of air or suspensions of solids Substances or liquids in air, oxygen or another carrier gas.

The gas supply for the low pressure chambers can be like said to be represented by throttle openings in the partition walls, which allow a gas flow with a small cross-section release from the high pressure chamber into the low pressure chambers, or through small diameter pipes between High and low pressure chambers. The gas for the low pressure chambers can also come from an independent source and if the burner is to be used with a mixture of gas and air, it can be advantageous to mix the low-pressure chambers to be supplied with a lower air content than the high pressure chamber has.

The gas in the high pressure chamber should generally be a

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Have a pressure of 2.5 to 0.25 mm water column, but can be considerably higher or lower if desired.

The combustion opening can through an opening in a relatively thin wall of the chamber are formed. The edges of the partition walls extend in this opening around them in the middle part and the two divide outer parts, with the edges of the partitions at opposite sides rarely parallel to a plane run through the longitudinal plane of the opening. With longitudinal plane due to the axis of the opening, the plane is perpendicular here, regardless of the shape and size of the focal opening to the plane running across the axes of the middle and outer parts of the combustion opening is meant. Thus, the edges of the partitions form two parallel ones Side walls that lead to the side edges of the central part of the opening, so that the gas is the central Part in converging streams parallel to the edge parts approaches the partition walls. The converging currents emerging from the central part push on top of each other and flatten out in a laminar manner, creating a flat flame.

The chamber of the gas burner preferably has a wedge-shaped burner head with a number along the length

909846 / Q34S,

Vertex of the combustion head arranged combustion openings, the partition walls being designed as two side panels are j those along the length of the head in this after are directed inward, their upper edges on or close to the walls of the head on opposite sides complete the median plane of the head and cut across the Burning openings run, and the lower edges of the 'side plates connect to the side walls of the burner head, and their end edges on the end walls of the burner head. The middle plane 'of the burner head is the through plane of symmetry running through the apex of the wedge-shaped head »

The two partitions can be separated from each other by spacers mounted on bolts, through into the Partitions molded or pressed projections, or by one in the to the central parts of the combustion openings leading passage introduced and between the two Partitions clamped corrugated sheet metal.

In the passage leading to the central files of the combustion openings, however, a thin, flat central sheet can also be inserted, which is at such a distance from the Partition walls are arranged so that there is a burn back '■ it is difficult for the flame to enter the gas chamber, which means that when the burner is operated with fast-burning gases such as town gas,

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with a high hydrogen content, a flashback is prevented.

The chamber of the gas burner can be designed as a tube, with a number of combustion openings along the top of the tube, with the partition walls as two side panels are formed with edges that extend over the combustion openings while the side panels are together with the wall of the pipe the high pressure and low pressure chambers form.

In a nozzle-shaped gas burner according to the invention, the combustion opening can be a rectangular opening at the end of the Be shown nozzle burner, the nozzle by two opposite parallel walls and has two opposing converging walls formed wedge-shaped outlet, in which the outer The ends of the walls form the combustion opening and the partition walls have two lobes which protrude into the outlet and, together with the parallel walls, the outlets of the feather pressure chambers between the partition walls and the inner wall of the nozzle.

Some embodiments of the invention will now be given as examples with reference to the drawings i described in these is:

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Fig. I is a cut-away perspective view of a burner according to the invention with a wedge-shaped Burner head,

Fig. 2 is a plan view of the burner of Fig. 1,

Fig. 3 is a sectional view taken along line 3-3 in Fig. 1,

Fig. 4 is a sectional view of an annular burner,

Fig. 5 is a section along line 5-5 in Fig. 4}

6 is a top plan view of a tubular burner according to FIG the invention,

. 7 is a view on the line VII-VII in FIG. 6,

Fig. 8 is an end view of a can burner according to the invention and

Figures 9 and 10 are sections on lines IX-IX and '. ': ■ x-x ·'; ... -

The ■ iii Figs. 1 - 3 shown burner has a

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909846/0345,

hollow housing 10 with a narrow rectangular opening in the upper part, a wedge-shaped burner head 11 on the opening in the upper part of the housing, the one with the side walls 12 of the housing forms a gas chamber 13, a partition arrangement 14 within the combustion head and an injector 15 on the open end of a mixing tube 16 in the bottom of the housing, which is after the gas chamber leads.

The burner head is formed from a sheet metal strip that is inserted into Longitudinal direction to a wedge-shaped apex 1? folded is, has vertical side parts 18, and at the ends is folded transversely to produce the end walls 19. The burner head has a number of rectangular combustion openings 20 running along the wedge-shaped apex and transversely to this. The side parts 18 and the end walls 19 of the Burner head are by means of screws 21 on the outer surfaces of the opening in the top of the housing Side and end walls of the housing attached.

The partition arrangement 14 has a central plate 25 and two side panels 26 which are folded longitudinally around one to form horizontal and vertical walls, ^ as Middle plate 25 is by screws 27 between the two

9098A6 / 03 4S,

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Side plates 26 are attached and separated from them by spacers 28 on the screws 27. The partition arrangement 14 rests on the upper ends of the side walls 12 of the housing, with the central plate 25 in the central plane of the head 11 and its upper edge close to the Crown of the head 11. ^ The sheets 25, 26 are of one such size that the outer ends of the horizontal walls of the sheets 26, the lower ends of the side walls of the apex 17 touch and the front ends of the sheets die Touch the end walls of the burner head. The top edges the vertical parts of the sheets 26 are close to the Edges at the top of the apex 17 and extend via the combustion openings 20, thus dividing each combustion opening into a central part 29 and two outer parts 50 (see I? ig.2). The horizontal parts of the metal sheets 26 have a number of small openings 31. Thus form the side plates 26 together with the side walls of the Apex 17 two low-pressure chambers 52, and together with the housing 10 a high-pressure chamber 55

The injector 15 does not form part of the present Invention and can be suitable in any form for introducing a gas or a gas-air mixture into the mixing tube 1 (5 to inject.

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During operation, the gases pass through the mixing tube and into the Compartment 33 in gas chamber 13. A large proportion of the gases, e.g. $ 75 or more, flow through the between the middle plate 25 and the vertical files of the side plates 26 formed passage after the edge of the apex 17. There they pass through the central part 29 of the Burning holes 2Q. Since the gases on their way to the Central openings 29 are guided between the two metal sheets 26, they occur in converging streams parallel to one Plane through the longitudinal axes of the combustion openings from each central part 29 of the same and their edges touch and thus form a flat, fan-shaped flame that a higher burning rate due to their large surface own.

- \ The remaining portion of the gases, e.g. $ 25 or less, flows through the openings 31 into the chambers 32 and from there through the outer cables 30 of the combustion openings 20. The one from the outer parts 30 of the combustion opening escaping gas fed flame is part of the base of the whole flame at the burning opening.

The openings 31 throttle the gas flow out of the chamber 33 into the two chambers 32 'so that the gas in the chamber 33 has a much higher pressure than that in the chambers

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909846 / 034S

mern 32. The gas flow emerging from the central openings 29 of each combustion opening directly connected to the high pressure chamber 33 thus has a much higher speed than the flows from the outer files 30 of the opening, which are directly connected to the low pressure chambers 32. The flames of the gas streams exiting at low speed through the outer portions 30 stabilize the flame of the high speed streams when the burner is used for low speed gases which could cause the high speed flow flame to lift off and go out. The middle plate 25 divides the space between the vertical parts of the plates 26 into two narrow passages and thus reduces the risk of flashback when the burner is operated with gases of high burning speed. If the burner is operated only with gases of low burning rate, the middle sheet 25 may _or F in tfall come.

If heat is to be generated over a larger area than is done by the burner according to FIG. 1, a group _of burners 11, each with the partition body 14, see FIGS. Burning head to form the

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from a common gas chamber in a common Burner housing is fed. You can also have a number of burner heads 11 in a star shape on a suitably shaped Arrange the housing and thus obtain a bundle of horizontal flames with a central axis.

The ring burner shown in Fig. 4 and 5 is of the type that is used, for example, for a gas stove and has a cylindrical housing 40 ₁ open at the top, a round cover 41 on the housing 40, which together with this forms the gas chamber 42 and a Partition body between the housing and the lid of the burner.

The side walls 44 of the housing 40 and the side walls 45 of the lid 41 are chamfered to allow in the gas chamber To form outlets of wedge-shaped cross-section, and the edges of the side walls of the housing and cover resting against one another are along the circumference at some points cut open to form the combustion openings 46, which are at the apex of the wedge-shaped part of the gas chamber 42 lie.

The partition body is shown as a flared tube 47, which together with the side walls of the housing 40 forms the low-pressure chamber 4Θ, and has further-

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towards a round disc 49, which is carried by the spacers on the flared end of the tube 47 and, together with the cover 41, forms a further low-pressure chamber 51. The tube 47 and the disc 49 together form the high pressure chamber 52 in the center of the burner. The tube 47 and the disc 49 are provided with small openings 531 54 which allow a throttled gas flow from the high pressure chamber 52 into the low pressure chambers 48 and 51. The circumferential edge of the disc 49 and the edge of the flared end of the tube 47 extend over the combustion openings 46 on opposite sides of the center line of the outlets of the gas chamber and thus divide each combustion opening into two outer parts which are connected to the low-pressure chambers 48 and 51 and a central part which is in communication with the high pressure chamber 52 via the passage between the disc 49 and the flared end of the tube 47 *

The burner shown in Figs. 4 and 5 operates on the same way as that shown in Figs. 1-3. A combustible (gas or gas-air mixture is a mixing tube 55, which leads to the high pressure chamber 52. Most of the gas passes through the disk 49 u ~ nci ■ the flared end of the tube 47 through the middle

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Divide the combustion orifices out as a shallow stream of relatively high velocity, while the remainder of the gases pass through the openings 55 and 54 into the low-pressure chambers 46 and 51, and then exit as a low-velocity flow through the outer parts of the combustion orifices.

The burner shown in Pig, 6 and 7 comprises a cylindrical tube 60 with a series of circular combustion openings 61 on the top; and has an insert of U-profile that extends over the entire length of the tube. The insert is formed from a base plate 63, which rests on the inside of the pipe, and two side walls 64, of which the lower parts converge and the upper parts stand vertically upwards. The ends of the insert are against end walls (not shown) of the pipe sealed. The upper edges of the side walls 64 extend over the internal openings 61 and subdivide each internal opening in a central portion 65 and two outer parts 66. The side walls are provided with openings 67, / from serving one is shown in Fig. 7.

When operating the burner according to FIGS. 6 and 7, a gas under relatively high pressure in the through the sidewalks " dungeh 64 * dia base plate 65 and the top

Tube formed high pressure chamber 68 passed, wherein the Openings 67 restrict the flow of gas from the Chamber 68 in the. release the two chambers 69 formed between the side walls 64 and the bore wall. The gas approaches in chamber 6 & the central openings 65 of the combustion openings in opposite directions, and is between the vertical upper parts of the Sidewalls 64 are guided so that it is in converging currents parallel to a perpendicular plane through the axes of the openings exits through the central openings 65, the streams converging and spreading to with to burn in a flat flame. The gas from the low pressure chambers 69 exits through the outer lines 66 of each opening and forms the stabilizing flame, with the flat flame coming out of the central openings united.

The burner shown in Figs. 8-10 has a Nozzle consisting of a vertical cylindrical tube 70 with a beveled tip 71 in which the right-angled focal port 72 is located. The tip 71 is internally converging in the shape of a wedge, 73, and is delimited by two converging walls 74 and two perpendicular ones parallel walls 75. Inside the Hohres are on top of each other two partition walls 76 attached to opposite sides of the combustion opening. Each partition has a V-shape

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vertical wall 77, an upwardly protruding concave tongue 78, which is an extension of the V-shaped wall forms and a bottom 79, which is the lower end of the Seals partition wall. The outer edges of the side wall 77 and the bottom 79 lie on the inner wall of the Tube on, the outer parts of the upper edges of the partition wall 77 lie on a flat inner wall in the Point 71, and the edges of the concave tongues 78 lie on the vertical walls 75 of the incision in the Tip on. At the base are the V-shaped partitions

connected by a rod 81. Thus the two form Partition walls together with the inner walls of the tube two chambers 82, and the tongues protrude into the combustion opening and divide these into a middle part 83 and two outer parts 84. The partitions are smaller in number orifices 85 provided, which allow a restricted gas flow from the interior of the tube into the two chambers.

During operation, the majority of that fed into the pipe flows Gas passes between the partitions and exits through the central part 83 of the combustion opening, while the rest of the gas flows through the openings 85 into the chambers 82 and through the two outer parts 84- of the combustion opening exit. The two converging walls 74 in the tip direct the gas exiting through the central opening

909846/0345 _v .

BATH ORIGINAL

44

in parallel streams parallel to the axis of symmetry between the side walls 75 of the tip, whereby the streams converge and spread to burn with a flat flame. The exiting through the two outer parts of the internal opening gas produced stabilizing! Lammen which connect to the flat J ¹ IaHUiIe from the central opening.

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Claims

909846/0345

Claims (14)

Pa t e η t a η spoke e: 1. Gas burner with a gas chamber, the interior of which is covered by a Subdivision is divided into separate chambers, which communicate with combustion openings in the wall of the chamber steep and with gas of different pressure fed so that a main flame with high pressure gas from the high pressure chamber and an auxiliary flame, which to prevent the main flame from blowing itself out, if low-pressure gas is fed from a low-pressure chamber, characterized in that the subdivision (26) has a combustion opening (20) in different sections (29, 50) divides, which are supplied with different chambers (33, 32) in Connected, and that the subdivision (26) so is arranged that the high pressure gas of the high pressure chamber (33) flows towards the burner opening in converging currents, whereby the gas after flowing through the Burning opening spreads out in a surface, and in shallower Flame burns, so that at least part of the flame base is fed with gas, which through a ϊβϋ the combustion opening flows, which with gas from the low-pressure chamber is fed. 9098415 / §3 45 _t φ ^^^^ * "** ¹ ^ " »ttJ ORIGINAL 2. Gas burner according to claim 1, characterized in that the subdivision (26) the combustion opening (20) into one central section (29), which is in communication with the high pressure chamber (33), and two outer sections (30), which are arranged laterally from the central section (29) and with two low-pressure chambers (32) in Are connected, divided, and that the wall of the high pressure chamber adjacent to the combustion opening is arranged is that the high pressure gas in the high pressure chamber flows towards the combustion opening in converging currents, whereby the gas is spread out into a surface and burns in a flat flame together with gas flowing in from both sides of the low-pressure chimneys. 3. Gas burner according to claim 2, characterized in that the combustion chamber has a plurality of combustion openings (20) and that the partition (26) with each focal opening cooperates so that the burner burns with a number of flat flames, the base of which is from the combustion opening Iti ede r pressurized gas is supplied. 4. Gas burner according to claim 3, characterized in that the combustion chamber has a wedge-shaped combustion head (11), the combustion openings (20) - - 23 909846-0345 extend that two side plates (26) are provided for subdivision, which extend over the length of the burner head extend and protrude into this that the upper edges of these side plates (26) at or near the Walls of the head lie on opposite sides of the median plane of the head and extend over the focal openings (20) extend that the lower edges of the side plates (26) on the side walls of the combustion head and the side edges of the side plates are in contact with the end walls of the burner head. 5. Gas burner according to claim 4, characterized in that the upper edges of the side plates (26) are parallel to one another extend and that plates (25) are provided between the upper edges of the side plates (26), which form kickback protection together with these. 6. Gas burner according to claim 4, characterized in that each side plate (26) is angled longitudinally and with one leg protrudes into the burner head while the other leg extends to the wall of the head Partition wall forms, and that another sheet (25) by spacers with the side sheets to form a unit (14) is connected and serves as a kickback protection with the other metal sheets. - 24 - 909846/0345 7. Gas burner according to claim 6, characterized in that the burner head (11) on the side walls of one above open vessel (12) sits and together with this forms the main gas supply chamber (13), and that from the Side plates (26) and the further plate (25) formed unit on the upper edges of the side walls of the housing (12) rests. 8. Gas burner according to claim 3> characterized in that the chamber is designed as a tube provided with a number of combustion openings (20) and the partition walls through two side plates (26) are formed with edges running over the combustion openings, the Partition walls together with the - ^ ear wall the high pressure (33) and low-pressure chambers (32). 9. Gas burner according to claim 8, characterized in that the upper cables of the two sheets are perpendicular and their lower parts diverge downwards to rest against the walls of the pipe. 10. Gas burner according to claim 8, characterized in that the two side plates are the side walls of a U-profile (63) which is mounted in the tube (60), - 25 909346/0345 wherein the high-pressure chamber (68) is formed by the interior of the U-profile and the two low-pressure chambers (69) are formed by the side parts of the U-profile and the side pipe wall, the side walls of the U-profile a number of openings (67) for the throttled passage of a gas flow from the Have high pressure in the low pressure chambers. 11. Gas burner according to claim 3, characterized in that the gas chamber (42) round from an open top Housing (40) and a cover (41) mounted on its side walls (44), the side walls (44, 45) of the housing (40) and the cover (41) are bevelled to create an annular Aualaßzone in the chamber of wedge-shaped cross-section, and their edges at certain intervals along the circumference of the Burner are cut away to form combustion orifices (46) along the apex of the outlet zone, and that the both partition walls have circular outer edges which extend over the openings (46) on opposite sides Extending sides of the median plane of the outlet zone in the chamber. 12. Gas burner according to claim 11, characterized in that one of the partitions is arranged by a in the cover - 26 9O & S46 / 0345 Nete round disc (49) _f and the other partition through an outwardly flared tube (47) _f, the flared end of which extends over the combustion openings (46), and the other end the side wall of the housing (40) touches, is formed, and the partition openings (53,54) have a throttled gas flow in between the disc (49) and the upper part of the cover (41) and between the flared tube (47) and the Allow walls of the housing formed chambers. 13. Gas burner according to claim 12, characterized in that the disc (49) on the flared end of the tube (47) attached spacers (50) is arranged. 14. Gas burner according to claim 3, characterized in that the combustion opening (70) through a rectangular opening is formed on the end face of a nozzle, the nozzle having a wedge-shaped outlet zone extending through two opposing parallel and two opposing converging walls (75 and 74, respectively) are formed whose outer edges form the boundaries of the combustion opening (70), and the partition walls (76) with two tongues (78) are provided which protrude into the outlet zone and together with the parallel walls (75) form passages, which are in communication with the chambers formed between the partition walls and the inner wall of the nozzle. 909846/0345