EP2743579A1 - Pointe de brûleur et brûleur - Google Patents

Pointe de brûleur et brûleur Download PDF

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Publication number
EP2743579A1
EP2743579A1 EP12197209.5A EP12197209A EP2743579A1 EP 2743579 A1 EP2743579 A1 EP 2743579A1 EP 12197209 A EP12197209 A EP 12197209A EP 2743579 A1 EP2743579 A1 EP 2743579A1
Authority
EP
European Patent Office
Prior art keywords
burner tip
wall
burner
displacement body
tip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP12197209.5A
Other languages
German (de)
English (en)
Inventor
Christoph Kiener
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.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP12197209.5A priority Critical patent/EP2743579A1/fr
Priority to US14/648,810 priority patent/US20150300633A1/en
Priority to CN201380065579.3A priority patent/CN104854405B/zh
Priority to EP13786205.8A priority patent/EP2898266A1/fr
Priority to PCT/EP2013/072422 priority patent/WO2014090476A1/fr
Publication of EP2743579A1 publication Critical patent/EP2743579A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F23D14/24—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 at least one of the fluids being submitted to a swirling motion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D1/00—Burners for combustion of pulverulent fuel
    • 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
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • 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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/76—Protecting flame and burner parts
    • 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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/78—Cooling burner parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q9/00—Pilot flame igniters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2214/00—Cooling

Definitions

  • the present invention relates to a torch tip, in particular a torch tip for high temperature applications in synthesis gas production.
  • the invention relates to a burner, in particular a burner for synthesis gas production.
  • a burner for a synthesis gas reactor is schematically shown in FIG DE 10 2008 006 572 A1 described.
  • This comprises an outer burner element, in the tip of a cavity with a displacer arranged therein is present. Around the displacement body around a cooling water channel is guided, which serves to cool the burner tip.
  • the burner further comprises an inner burner element, which is arranged concentrically to the outer tube. Between the inner burner element and the outer burner element, a channel for the supply of fuel dust, such as coal dust, is formed.
  • the inner burner element has in the region of its tip a cavity with a displacer arranged therein, around which a cooling water channel is guided, with which the tip of the inner burner element is cooled, on.
  • a pilot burner is arranged, wherein between the inner burner element and the pilot burner, a supply channel for an oxygen / steam mixture is formed.
  • the pilot burner is hollow-walled, wherein in the region of the tip of the pilot burner, a displacement body is arranged around which a cooling water channel is guided in order to cool the pilot burner tip can.
  • the burner tips of burners in synthesis gas reactors are exposed to high temperatures during operation of the reactor, so that a considerable heat input into the burner tip takes place.
  • the heat input is dissipated by the cooling water flowing in the described cooling water channels.
  • the burner tip can also be provided with a thermal barrier coating, as in DE 10 2008 006 572 A1 is described.
  • the respective burner elements are usually composed of a plurality of tubes and a tube connecting the tubes together, in which the displacement body is arranged, constructed.
  • the tip is usually assembled from an outer annular member and an inner annular member, wherein the outer annular member is connected to the outer tube and the inner annular member with the inner tube.
  • the annular parts are welded together at their ends facing away from the outer tube or the inner tube.
  • the displacer is connected to a centrally located tube which divides the space between the outer tube and the inner tube into an annular supply channel for cooling water and an annular discharge channel for cooling water.
  • Each burner element therefore has a complex structure.
  • the burner tips are relatively large, and thus heavy, which reduces their handling, for example, as part of a maintenance.
  • the wall thicknesses of the tubes or the tip parts are typically at least 3 mm, which makes the heat removal difficult and increases the susceptibility to temperature fluctuations.
  • suspended particles and cooling water over time can lead to a narrowing of the cooling water channels in the region of the burner tip or even to a blockage of the cooling water channels, which entails an increased need for maintenance so that such constrictions can be detected in good time.
  • a burner tip is provided with a burner outlet opening and at least one burner tip part surrounding the burner outlet opening, which has a burner tip wall with an end wall forming a closed end of the burner tip part.
  • the burner tip part has in its interior a reaching to the end wall cavity, the burner tip wall facing a cavity wall inside.
  • a displacement body is arranged with one of the wall inside of the burner tip wall facing the displacement body outside, wherein between the wall inside the burner tip wall and the displacement body outside at least one flow channel is formed.
  • the displacer is connected to the inside wall of the burner tip wall via support structures extending from the displacer body outside to the inside wall of the torch tip wall.
  • the support structures can in particular be configured as web-like or pillar-like structures, wherein adjacent web-like or pillar-like structures converge to form arcs on the displacer outside and / or on the inside of the wall of the burner tip wall, at least in the area of the burner tip end wall. These arches can be formed in particular as pointed arches, similar to the arches in Gothic architecture.
  • the design of the support structures as web-like or pillar-like structures with converging arcs allows the production of the burner tip with a generative layer construction process (English: additive manufacturing process), for example. With a selective laser melting (selective laser melting).
  • the density of support structures which connect the displacement body to the burner tip wall is increased at least in the area of the end wall in comparison to other areas of the burner tip wall.
  • the burner tip wall can be made thinner compared to areas without increased density of support structures.
  • it may have thicknesses below 3 mm, for example. Thicknesses in the range of 0.5 to 2 mm. In this way, in areas exposed to particularly high temperatures and / or particularly pronounced temperature fluctuations, the heat absorbed by the burner tip wall can be dissipated more rapidly to the cooling fluid, whereby the thinner wall can be kept cooler than a thicker wall, which in turn has a favorable effect on the available operating time up to a maintenance.
  • the displacement body may be formed in particular in one piece with the support structures and the burner tip wall. This allows a particularly stable structure and allows for many structures at all the production only. Die As already mentioned, production can be effected by additive manufacturing processes, for example by selective laser melting.
  • the burner tip wall can be coated with a thermal barrier coating at least in the region of the end wall.
  • a thermal barrier coating is applied to the thinner regions, in particular in the region of the end wall.
  • the fact that in this embodiment, in the areas with thermal barrier coating, the burner tip wall is thinner, can be achieved that the entire wall thickness in these areas, despite the applied thermal barrier coating, the thickness of the remaining areas without thermal barrier coating is not exceeded.
  • the displacement body in the burner tip according to the invention may in particular be hollow.
  • the hollow formation of the displacement body it is possible to save weight and material in comparison to combustion tips according to the prior art in which the displacement body is designed as a solid body. Because of the lower weight, the torch tip, which can have diameters of 50 cm and more, is easier to handle, for example as part of a maintenance or repair process.
  • the latter has an end proximal to the end wall, a distal end to the end wall, a displacement body interior, and in the region of the distal end at least one displacement body opening towards the displacement body opening.
  • a cooling fluid for example cooling water
  • a flow-guiding element can be arranged in the displacement body opening in this way be that it divides the displacement body opening into an inflow portion and an outflow portion and that between the inflow portion and the outflow portion, a flow path is formed around the flow guide.
  • the displacement body has at least one further displacement body opening which is open toward the displacement body interior. This is then arranged between the proximal end of the displacement body and arranged in the region of the distal end displacement body opening. Between the displacer opening and the further displacer opening, the displacer interior forms a flow path for cooling fluid, such as cooling water.
  • a foreign matter collecting space branching from the flow path in the displacement body interior may be located in the fluid flowing through the flow path.
  • the collecting space in the displacement body interior is located in a region of the flow path in which a change in the direction of flow takes place. It is particularly advantageous if the change in the flow direction brings about a substantial flow reversal.
  • the hollow displacement body is enough space to provide a sufficiently large collection space available. The collection of foreign matter such as suspended particles in the cooling fluid causes the fluid channels leading around the outside of the displacement body to clog up more slowly, thereby delaying a narrowing of the flow cross-section for a longer time. This in turn has a favorable effect on the maintenance intervals.
  • swirl blades which at least partially project into the burner outlet opening, can also be formed in one piece with the burner wall. So far, swirl blades from the burner tip facing away from the firing side in the of the burner wall surrounded the burner outlet opening inserted. This insertion may damage the swirl vanes and / or the burner tip wall.
  • integrally forming the swirl blades with the burner tip wall the insertion of swirl blades is unnecessary.
  • the flow channel formed between the wall inside of the burner tip wall and the displacement body outside at least partially extends through the swirl blades. In this way, a common cooling of burner tip and swirl blades is possible.
  • the swirl blading can also be given the shape of a nozzle, which reduces the flow channel of the oxygen-vapor mixture in certain areas.
  • the burner tip wall and the displacement body may be formed toroidal.
  • a burner tip is provided with a burner outlet opening and at least one burner tip part surrounding the burner outlet opening, which has a burner tip wall with an end wall forming a closed end of the burner tip part.
  • swirl vanes which at least partially project into the burner outlet opening, are formed in one piece.
  • the flow channel formed between the wall inside the burner tip wall and the displacement body outside extends at least partially through the swirl vanes. In this way, a common cooling of burner tip and swirl blades is possible.
  • the swirl blades With the aid of special manufacturing methods (generative layer-building methods), it is possible for the swirl blades to form a blading which has the shape of a nozzle which reduces the flow cross-section for an oxygen-vapor mixture flowing through the blading in certain regions of the blading.
  • An inventive burner is provided with a burner tip according to the invention.
  • the associated properties and advantages result from those of the burner tip according to the invention.
  • the burner is constructed rotationally symmetrically about a burner axis A and comprises a tubular feed line section and a burner tip 1 adjoining the feed line section and surrounding a burner opening 3.
  • the burner comprises a first, outer burner element 2, which is formed in the tubular portion of the burner of three telescoped tubes 4, 6, 8. Between the tubes, a cooling fluid supply channel 7 and a cooling fluid discharge channel 9 are formed, can be supplied via the cooling fluid into the burner tip 1 and can be discharged therefrom.
  • a cooling fluid in particular water comes into consideration.
  • the outer burner element 2 deviates from the pure tube shape and is inclined in the direction of the center of the burner outlet opening 3.
  • it has in the region of the tip a cavity in which a displacement body 5 is arranged at a distance from the wall of the burner element 2 in this area.
  • a flow channel 10 is formed through which the cooling fluid, such as cooling water, is passed through the tip of the outer burner element 2 to cool it.
  • the deviating from the tubular portion of the outer burner element 2 is an outer burner tip portion 11 which is formed as a separate part and its wall 11 A to the tubular portion of the outer burner element 2 is welded.
  • the wall 11A of the burner tip portion 11 has an approximately U-shaped bend so that it can be connected to both the outer tube 4 and the inner tube 8 of the tubular portion of the outer burner element 2.
  • the displacement body 5 is attached to the middle tube 6. For this purpose, it has a groove 5A whose width is adapted to the wall thickness of the central tube 6 of the tubular portion.
  • the burner further comprises an inner burner element 12 which, except in the region of the burner tip 1, is likewise formed from three telescoping tubes 14, 16, 18.
  • an inner burner tip part 15 with a cavity located therein adjoins the tubular section of the inner burner element 12.
  • a displacement body 15 is arranged, wherein the displacement body outside has a distance to the inside of the burner tip wall 21A in the region of the inner burner tip part 21, so that a flow channel is formed between the two.
  • the supply of cooling fluid into the flow channel via a nested between the tubes 14, 16 of the tubular portion of the inner burner element 12 formed feed channel 17, the removal of the cooling fluid from the region of the inner burner tip portion 21 via a discharge channel formed between the telescoped tubes 16, 18 19.
  • the inner burner tip part is formed as a separate part
  • the wall 21 A is welded to the outer tube 14 and the inner tube 18 of the tubular portion.
  • the wall 21A is bent in a broad sense U-shaped so that it can be welded to both the outer tube 14 and the inner tube 18 of the three nested tubes 14, 16, 18 of the tubular portion.
  • the displacement body 15 is attached to the middle tube 16 of the tubular portion.
  • it has a groove 15A whose width is adapted to the wall thickness of the central tube 16.
  • the inner burner element 12 has an outer diameter which is smaller than the inner diameter of the outer burner element 2, so that an annular channel is formed between the two, which serves for supplying a pulverized fuel, for example for the supply of pulverized coal.
  • the inner burner element 12 encloses a largely cylindrical space in which a pilot burner 21 is arranged.
  • This comprises a tubular portion 22A, which is formed from three tubes 24, 26, 28 and to which a pilot burner tip part 31 adjoins in the region of the burner tip 1.
  • the pilot burner tip part 31 has a cavity in which a displacement body 25 is arranged, wherein the displacement body outside a distance from the inside of the wall 31A of the pilot burner tip portion 31 has, so that between them a flow channel 30 is formed.
  • the wall 31A of the tip portion 31 is welded to the tubular portion.
  • the wall 31A of the pilot burner tip portion 31 is bent in the broadest sense U-shaped so that it can be welded on the one hand to the outer tube 24 of the tubular portion of the pilot burner 21 and with the inner tube 28 of the tubular portion of the pilot burner 21.
  • the displacement body 25 is attached to the middle tube 26 of the tubular portion. For this purpose, it has a groove 25A whose width is adapted to the wall thickness of the middle tube 26.
  • the tubular portion of the pilot burner 22 has an outer diameter which is smaller than the inner diameter of the inner burner element 12, so that between both an oxygen / steam channel 23 is formed.
  • This is used to supply water vapor, which is required in the synthesis gas reactor for the conversion of the fuel dust into synthesis gas, and optionally for the supply of oxygen or air.
  • the supplied water vapor, and optionally the supplied oxygen or the supplied air is fluidized to the synthesis gas reaction promote.
  • swirl blades 32 are arranged in the region of the burner tip 1 between the inner burner element 12 and the pilot burner 22.
  • the pilot burner 22 encloses a substantially cylindrical cavity in which a pilot burner and a device for flame monitoring are arranged. These two elements are shown in the figure only highly schematic and summarized by the reference numeral 33.
  • FIG. 2 shows the structure of the outer burner tip portion 11.
  • the outer burner tip portion 11 terminates in an end wall 34, which is the end of the outer burner tip portion.
  • a cavity is formed, in which, as already described, the displacement body 5 is located.
  • FIG. 2 is shown hollow. It has an end 36 which is proximal to the end wall 34 and an end 38 which is distal to the end wall and has a groove 5A for attachment to the middle tube 6 of the tubular section of the burner element.
  • a displacement body opening 40 which is open to the interior space 42 of the hollow displacement body 5, so that the interior space 42 is accessible through the displacement body opening 40 .
  • the roughly U-shaped torch tip wall 11A is connected to both the outer tube 4 and the inner tube 8 of the tubular portion of the outer burner element 2, while the displacer 5 is connected to the central tube 6 of the tubular portion of the outer burner element 2 in that the displacer body opening 40 is open to the supply channel 7 formed between the outer tube 4 and the middle tube 6.
  • the displacement body interior 42 is thereby fluidly connected to the supply channel 7 for the cooling fluid.
  • the hollow displacement body 5 which consists essentially of a relatively thin displacement body wall 44, is connected via support structures 46 to the inside of the burner tip wall 2. These may be web-like or pillar-shaped, so that they obstruct the flow in the flow channel 10 as little as possible and possibly even conduct.
  • Fig. 3 shows the structure of the inner burner tip part 21 and the subsequent telescoped tubes 14, 16, 18 of the tubular portion of the inner burner element 12.
  • the inner burner tip part 21 has a burner tip wall 21A with an end wall 47 which forms the closed end of the inner burner tip part 21, on.
  • a displacement body 15 is located in the cavity of the inner burner tip portion 21, a displacement body 15.
  • This in turn is itself hollow and has a displacement body interior 52 surrounding displacement body wall 54 on.
  • the displacement body 15 has a front end 47 to the proximal end 48 and a distal end wall 47 to the end 49 with a groove 15 A for attachment to the central tube 16 of the tubular portion of the burner element.
  • a displacement body opening 50 is arranged, via which the displacement body interior 52 is accessible.
  • the burner tip wall 21A of the inner burner tip portion 21 is bent approximately U-shaped with the ends of the burner tip wall 21A connected to the outer tube 14 of the tubular portion of the inner burner element 12 and to its inner tube 18.
  • the displacer body wall 54 is connected to the center tube 16 of the tubular portion of the inner burner element 12 such that the displacer body opening 50 is also open between the outer tube 14 and the middle tube 16 of the tubular portion of the inner burner element 12. In this way, the displacement body interior 52 is fluidly connected to the supply channel 17 for the cooling fluid.
  • the displacement body wall 54 is over support structures, which may be formed, for example, web-like or pillar-like, connected to the inside of the burner tip wall 21A, so that a defined distance between the displacement body outside and the inside of the burner tip wall 21A is present to form the flow channel 20.
  • the support structures can also be designed such that they guide the flow through the flow channel, but in any case they are designed so that they impede the flow as little as possible.
  • swirl vanes 32 are integrally formed.
  • the swirl vanes 32 are hollow, and each have a swirl vane interior 58 which is fluidly connected via a cooling fluid inlet opening 59 and a cooling fluid outlet opening 60 to the flow channel 20 which leads around the displacement body 15.
  • the swirl body interior 58 is thus part of the cooling circuit, so that the swirl vanes 32 are cooled together with the inner burner tip part 21 by the cooling fluid.
  • a tube 62 is formed in the present embodiment, which serves as a guide for the insertion of the pilot burner 22.
  • the tube 62 shown in the figure thus represents only an option.
  • the structure of the pilot burner 22 in the region of the burner tip 1 is in FIG. 4 shown.
  • the pilot burner tip portion 31 and the tubular portion of the pilot burner 22 formed from the three nested tubes 24, 26, 28 can be seen.
  • the pilot burner tip portion 31 has an approximately U-shaped burner tip wall 31A, which defines an interior of the burner Pilot burner tip portion 31 surrounds.
  • a displacement body 25 is arranged in the interior.
  • the displacer 25 located in the interior of the pilot burner tip part 21 is also hollow. It has a proximal end 66 facing the end face 76 and a distal end 68 remote from the latter, with a groove 25A for attachment to the middle tube 26 of the tubular section of the burner element.
  • a displacement body opening 70 is arranged, via which the interior 72 of the displacement body 25 is accessible.
  • the displacement body interior 72 is surrounded by a displacement body wall 74, which is connected via support structures 76, for example, the previously described pier-like or web-like structures, with the inside of the burner tip wall 31A.
  • the support structures 76 may be formed flow-conducting. In any case, however, they are designed so as not to obstruct the flow through the flow channel 30 formed between the displacer outside and the inside of the burner tip wall 31A.
  • the two ends of the roughly U-shaped torch tip wall 31A of the pilot burner tip 31 are connected to the outer tube 24 and the inner tube 28 of the tubular section of the pilot burner 22, the displacer wall 74 to the central tube 26 of the tubular section.
  • the connection is made at a location of the displacer wall 74 that is selected such that the displacer opening 70 is open to the supply channel formed between the outer tube 24 of the tubular section of the pilot burner 22 and its central tube 26.
  • the displacement body interior 72 is thereby integrated into the cooling fluid circuit.
  • the outer diameter of the pilot burner 22 is selected so that it can be inserted into the tube 62 of the inner burner wall 12.
  • the pilot burner 22 also encloses a substantially cylindrical interior in which a pilot burner and a flame monitoring device can be arranged.
  • the burner tip parts 11, 21, 31 are each made separate from the tubular sections formed by the nested tubes. Subsequently, the nested tubes are then connected, for example by means of a welding process with the respective burner tip parts.
  • the burner tip parts can each be produced in one piece by means of a generative layer construction method.
  • the described complex structures in which hollow displacement bodies are connected to the burner tip walls via support structures become possible.
  • the one-piece production of the swirl vanes 32 and the tube 62 with the inner burner tip part 21 can be ensured by the generative production by means of a layer-building method 5.
  • selective laser sintering can be used as a generative layer-building method.
  • FIG. 3 A variation of the in FIG. 3
  • the illustrated embodiment will be described below with reference to FIG. 5 described.
  • the modification focuses essentially on the design of the displacement body and its displacement body interior.
  • the remaining elements of in FIG. 3 described embodiment, such as the swirl blades, are therefore in FIG. 5 not shown.
  • Elements that look like those FIG. 3 correspond with the same reference numerals as in FIG. 3 and will not be explained again to avoid repetition
  • the displacement body of in FIG. 5 shown embodiment differs from the displacement body of in FIG. 3 illustrated embodiment essentially in that its displacement body opening 50 is increased.
  • a flow guide 80 protrudes from the inside of the inner burner wall into the displacement body opening 50, so that the flow guide 80 divides the opening into an inflow section 81 and an outflow section 82.
  • a flow reversal 84 In the area of flow reversal 84, a collection space 85 branches off from the flow path 83, the access to the collection space being approximately in the original flow direction, ie the flow direction before the flow reversal is. Suspended particles in the cooling fluid can not understand the abrupt change of direction in the flow reversal due to their inertia as easily as the fluid itself, so that the suspended particles can enter the collection chamber 85 and settle there.
  • FIG. 6 Another alternative to the embodiment FIG. 3 is in FIG. 6 shown. Elements that look like those FIG. 3 are the same reference numerals as in FIG. 3 and will not be explained again to avoid repetition. As in FIG. 5 are in FIG. 6 the swirl vanes 32 and the cylindrical tube 62 are not shown, since these are not of the in FIG. 3 different embodiment illustrated.
  • the main difference to that in FIG. 3 illustrated embodiment is that the end wall 147 is formed thinner than in the in FIG. 3 illustrated embodiment.
  • the density of support structures 146 is increased in its area.
  • the support structures 146 are formed as pillar-like structures, which converge on the displacement body 15 in arcs.
  • the arches are formed as pointed arches, so that the pillar-like support structures form a kind of vault, which has the shape of a Gothic vault.
  • the thin wall can also extend beyond the end wall 147 and even form the entire burner tip wall 21A.
  • the thin wall is less susceptible to thermal fluctuations.
  • the described pointed arch-like configuration of the support structures can be realized by means of the already mentioned generative layer construction method.
  • the referring to FIG. 6 described embodiment of the support structures and the wall thickness can also be realized in the burner tip parts 11, 31 of the outer burner element 2 and the pilot burner 22.
  • FIGS. 7 and 8 An alternative form of support structures, which also allows a reduction in the wall thickness of the burner tip wall is in the FIGS. 7 and 8 shown. It shows FIG. 8 a cut along in FIG. 7 shown line VIII-VIII.
  • the support structures shown are in the form of webs 86 formed between the displacer wall 54 and the burner tip wall 21A and extending from the distal end of the displacer 15 about its proximal end and back to the distal end.
  • the webs 86 run parallel and converge both on the displacement body outside and on the inside of the burner wall in arcs.
  • the arches are pointed arches, so that between the individual webs flow channels 20 are formed with cross-sections which correspond to an ellipse tapered at their ends.
  • this configuration of the support structures allows reducing the wall thickness with high stability of the thinner wall. The referring to the FIGS.
  • FIGS. 7 and 8 Support structures described can be used in the burner tip portion 11 of the outer burner element 2 and / or the burner tip portion 21 of the inner burner element 12 and / or the pilot burner tip portion 31.
  • FIGS. 7 and 8 Pointed arches have been described, other forms of arch, are used, the respective arch form may be selected, inter alia, in view of the selected manufacturing process.
EP12197209.5A 2012-12-14 2012-12-14 Pointe de brûleur et brûleur Withdrawn EP2743579A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP12197209.5A EP2743579A1 (fr) 2012-12-14 2012-12-14 Pointe de brûleur et brûleur
US14/648,810 US20150300633A1 (en) 2012-12-14 2013-10-25 Burner tip and burner
CN201380065579.3A CN104854405B (zh) 2012-12-14 2013-10-25 燃烧器喷尖和燃烧器
EP13786205.8A EP2898266A1 (fr) 2012-12-14 2013-10-25 Pointe de brûleur et brûleur
PCT/EP2013/072422 WO2014090476A1 (fr) 2012-12-14 2013-10-25 Pointe de brûleur et brûleur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12197209.5A EP2743579A1 (fr) 2012-12-14 2012-12-14 Pointe de brûleur et brûleur

Publications (1)

Publication Number Publication Date
EP2743579A1 true EP2743579A1 (fr) 2014-06-18

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EP12197209.5A Withdrawn EP2743579A1 (fr) 2012-12-14 2012-12-14 Pointe de brûleur et brûleur
EP13786205.8A Withdrawn EP2898266A1 (fr) 2012-12-14 2013-10-25 Pointe de brûleur et brûleur

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EP13786205.8A Withdrawn EP2898266A1 (fr) 2012-12-14 2013-10-25 Pointe de brûleur et brûleur

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DE202014105403U1 (de) 2014-11-11 2014-12-08 Choren Industrietechnik GmbH Drallkörper und Brenner mit Drallkörper
DE102014116411A1 (de) 2014-11-11 2016-05-12 Choren Industrietechnik GmbH Drallkörper und Brenner mit Drallkörper sowie Verfahren zur Herstellung des Drallkörpers

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FR3067946A1 (fr) 2017-06-23 2018-12-28 IFP Energies Nouvelles Plateau distributeur pour colonne d'echange avec caisson pour la distribution du gaz
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DE202014105403U1 (de) 2014-11-11 2014-12-08 Choren Industrietechnik GmbH Drallkörper und Brenner mit Drallkörper
DE102014116411A1 (de) 2014-11-11 2016-05-12 Choren Industrietechnik GmbH Drallkörper und Brenner mit Drallkörper sowie Verfahren zur Herstellung des Drallkörpers

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US20150300633A1 (en) 2015-10-22
CN104854405B (zh) 2017-05-17
WO2014090476A1 (fr) 2014-06-19
CN104854405A (zh) 2015-08-19

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