EP3130850B1 - Gas grid burner - Google Patents
Gas grid burner Download PDFInfo
- Publication number
- EP3130850B1 EP3130850B1 EP16178760.1A EP16178760A EP3130850B1 EP 3130850 B1 EP3130850 B1 EP 3130850B1 EP 16178760 A EP16178760 A EP 16178760A EP 3130850 B1 EP3130850 B1 EP 3130850B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- flow
- held
- support
- burner according
- 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.)
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- 239000007789 gas Substances 0.000 claims description 113
- 239000002737 fuel gas Substances 0.000 claims description 13
- 230000006641 stabilisation Effects 0.000 claims 2
- 238000011105 stabilization Methods 0.000 claims 2
- 230000000087 stabilizing effect Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000000284 resting effect Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D91/00—Burners specially adapted for specific applications, not otherwise provided for
- F23D91/02—Burners specially adapted for specific applications, not otherwise provided for for use in particular heating operations
-
- 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
- F23D14/70—Baffles or like flow-disturbing devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUESÂ
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/08—Arrangements of devices for treating smoke or fumes of heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2211/00—Thermal dilatation prevention or compensation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/21—Burners specially adapted for a particular use
- F23D2900/21003—Burners specially adapted for a particular use for heating or re-burning air or gas in a duct
Definitions
- the invention relates to a gas surface burner with a gas pipe extending in a longitudinal direction, at the spaced a plurality of gas nozzles are held, whose outlet axes are arranged parallel to each other and transverse to the longitudinal direction, and with a plurality of Strömungsleit wornen, each having at least one gas nozzle is assigned, wherein adjacent to the gas pipe, a longitudinally extending carrier is arranged, on which the flow guide means are held.
- Such a gas surface burner is for example from the US 3,649,211 A known.
- the object of the invention is to eliminate the aforementioned disadvantage. This object is achieved in a generic gas surface burner by the Solved measure that the Strömungsleit Anlagenen are held with play pluggable on the carrier and are mechanically decoupled from the carrier and the gas pipe.
- the flow guiding devices which can assume considerable temperatures during operation, are mechanically decoupled from both the carrier and the gas pipe, so that unavoidable thermal expansion of the material can not lead to unacceptable stresses in the carrier or in the gas pipe.
- the flow-guiding devices are detachably, in particular releasably detachable, held on the carrier without tools, so that the flow-guiding devices can be easily removed or exchanged from the carrier.
- the carrier at least partially surrounds the gas pipe at a distance and has aligned fuel gas outlet openings with outlet axes of the gas nozzles.
- the carrier is designed as a carrier tube surrounding the gas tube at a distance, which may be cylindrical or oval in cross-section.
- the gas pipe may be arranged concentrically or eccentrically in the support tube, and suitably eccentrically against a gas outlet direction from the gas nozzles.
- the gas surface burner may be arranged in a channel which has two opposite transverse to the longitudinal direction of the channel walls, wherein the gas pipe at a Supply end firmly fixed to a first channel wall and is guided displaceably in the longitudinal direction at an opposite closed end on a second channel wall for thermal expansion compensation. Accordingly, it can be provided that the support is firmly held at a first end to the first channel wall and displaceable in the longitudinal direction at an opposite second end on the second channel wall for thermal expansion compensation.
- Each flow-guiding device can have at least one fastening element held on the support and at least one flow-guiding element held by the fastening element, wherein the fastening element is held on the support and the at least one flow-guiding element can be plugged and in particular releasably secured to the fastening element.
- each flow guide has two spaced longitudinally arranged mounting plates which engage with fastening tabs with clearance in retaining slots of the carrier, wherein at least one fastening tab of a mounting plate has a Sich ceremoniessöffuung, in the assembled state on one of the remaining part of the mounting plate located on the opposite side of the carrier and in the at least one securing element can be inserted.
- the attachment plates are preferably oriented transversely to the longitudinal axis.
- the at least one securing element may be bar-shaped and secure all mounting plates simultaneously by engaging in the longitudinally aligned securing openings of all mounting plates.
- At least one flow guide is held by two mounting plates of a flow guide, which engages with retaining tabs with clearance in receiving slots of the mounting plates.
- the at least one flow guide is held captive by the receiving slots in the mounting state of the mounting plates.
- the at least one securing element engages with play in the securing openings.
- Each flow-guiding device can have flow-guiding elements arranged symmetrically with respect to a plane of symmetry containing the longitudinal axis and the exit axes of the gas nozzles.
- Each flow-guiding element may comprise two shielding elements extending at a distance and in particular concentrically with respect to the carrier tube, and two radially extending stabilizing elements. Between each shielding element and the carrier tube, a gap or flow space may be formed. There may be a spacing between each stabilizing element and the carrier tube, whereby a flow inlet region is formed in the flow space.
- FIG. 1 shows a schematic side view of a generally designated 2 gas-area burner, which is arranged in a channel 4, which is formed by a first channel wall 6 and a second channel wall 8.
- the gas surface burner 2 has a gas pipe 10, which is provided in the region of the first channel wall 6 with a gas connection 12 for supplying fuel gas, and a support tube 14, which surrounds the gas pipe 10 and on which a number of flow guides 16 in the form of individual Segments, at mutual intervals along a longitudinal direction 18, are held.
- the gas pipe 10 and the support tube 14 are fixed to the first channel wall 6 and slidably mounted in the longitudinal direction 18 seen in the region of the second channel wall 8 to absorb thermal expansion occurring during operation.
- FIG. 3 and 6 explain the attachment or storage of the gas pipe 10 and the support tube 14 at the opposite channel walls 6 and 8 in more detail.
- FIG. 3 shows a fastening part 20, which serves to attach the gas pipe 10 and the support tube 14 to the first channel wall 6, and a bearing plate 22 for longitudinally displaceable and the thermal expansion compensating storage and support of the gas pipe 10 and the Support tube 14 in the region of the second channel wall 8.
- an igniter 26 and a flame detector 28 are indicated on the mounting part 20, in addition to the longitudinally displaceable mounting 24 of the gas and carrier tube.
- FIG. 6 explains the storage 24 in more detail.
- the gas pipe 10 is mounted longitudinally displaceable in the longitudinal direction 18 in the support tube 14 in the region of its closed or free end, which in turn is also freely displaceable in the region of its free end in the longitudinal direction 18 on rollers 30 and guided.
- the rollers 30 are held about a longitudinal axis perpendicular to the axis of rotation of the bearing plate 22 which is fixed to the second channel wall 8.
- FIG. 2 shows in a cross-sectional view of the gas surface burner 2 whose basic structure.
- the gas pipe 10 is provided with a number of spaced along the longitudinal direction 18 at spaced intervals disposed gas nozzles 34 whose exit axis 34a are arranged transversely to the longitudinal direction 18 and each parallel to each other.
- the mutual distances of the individual gas nozzles can be identical.
- groups of z. B. each two, three or four gas nozzles may be formed with a narrower distance.
- the gas nozzles 34 may be held exchangeably on the gas pipe 10, for example screwed into threaded bores of the gas pipe 10, which expediently has a cylindrical or oval cross-sectional shape.
- the support tube 14 also extends in the longitudinal direction 18 and encloses the gas pipe 10, wherein the support tube may be arranged concentrically or eccentrically with respect to the gas pipe 10.
- FIG. 2 shows a situation in which the gas surface burner 2 is arranged in a channel with flow direction 40, ie in FIG. 2 from right to left. It may be expedient here if the gas pipe 10 is arranged eccentrically within the carrier pipe 14 counter to the direction of flow 40, or in other words counter to the gas outlet direction from the gas nozzles 34.
- the support tube 14 has in the region of each gas nozzle 34 adjacent and relative to the respective gas nozzle 34, with its outlet axis 34a, in alignment, a Brenngasaustrittsöffu 42, and on an opposite side two flow inlet openings 44.
- Gas to be heated by the gas surface burner gas in the direction of flow 40 and having an oxygen content, for example.
- Flue gas or exhaust gas such as gas turbine exhaust gas can partially enter through the flow inlet openings 44 in the support tube 14, wherein it flows around the gas pipe 10 and partially mixed with flowing out of the gas nozzle 34 fuel gas flows out of the fuel gas outlet opening 42.
- the inflow and outflow of the carrier tube 14 into and out of the carrier tube 14 is induced to a greater or lesser extent by the momentum of the fuel gas flowing out of the gas nozzle 34.
- FIG. 1 and 2 a number of Strömungsleit boots 16 are held on the support tube 14, wherein in each case one Strömungsleit responded 16 a certain number or a group of gas nozzles 34 and fuel gas outlet openings 42, in the example shown, this three gas nozzles 34 per flow guide 16, is assigned.
- FIG. 5 indicates that each flow guide 16 are associated with three gas nozzles 34 by the fuel gas outlet openings 42 associated with each gas nozzle 34 are shown in the sectional view of the support tube 14. Downstream of the flow guides 16, a combustion zone or flame is formed during operation.
- FIG. 2 shows with arrows the flow during flow from the right (inflow 40).
- FIG. 4 shows the structure of a flow guide 16 in more detail.
- Each flow-guiding device 16 comprises two fastening plates 52 as fastening elements, which are each held in a plane perpendicular to the longitudinal direction 18 on the support tube 14.
- Each mounting plate 52 has two fastening tabs 54 which engage with play in retaining slots 56 of the support tube 14.
- Each fastening tab 54 is provided with a securing opening 58. In the assembled state, the fastening tabs 54 are located with the securing openings 58 within the support tube 14, which in FIG. 2 and 5 is apparent.
- All securing openings 58 of the fastening plates 52 of all the flow-guiding devices 50 are aligned with one another in the longitudinal direction 18 and allow the insertion of a rod-shaped securing element 60 (FIG. FIG. 5 ), so that a captive mounting of the mounting plates 52 is ensured on the support tube 14.
- the attachment plates 52 serve to hold the actual flow guide elements on the support tube 14, wherein two pairs of flow guide elements are present in the illustrated example, each consisting of a shielding element 62 and a stabilizing element 64 symmetrical to one the longitudinal axis and the exit axes 34a of the gas nozzles 34 containing Symmetry plane 66 ( FIG. 2 ) are arranged.
- the shielding elements 62 are arranged at a distance from the carrier tube 14 and substantially concentric thereto, wherein an outlet opening 68 is formed between the two shielding elements 62 of a flow-guiding device 16 arranged at a distance relative to the circumferential direction, which outlet openings communicate with the fuel-gas outlet openings 42 and the gas nozzles assigned to the flow-guiding device 16 34 and whose exit axes 34a is aligned.
- the shielding elements 62 are substantially rectangular, so that the outlet opening 68 also has a rectangular shape.
- Each stabilizing element 64 is arranged at a radial distance from the support tube 14 ( Fig. 2 ), so that a flow entrance region 64a is formed in the flow space 65.
- each shielding member 62 is provided with four retaining tabs 70, each of which engage with play in a receiving slot 72 of the mounting plates 52.
- each stabilizing element 64 is provided with four retaining tabs 74, each of which engage with play in a receiving slot 76 of the mounting plates 52.
- each shielding element 62 is further provided with a further retaining lug 78, which engages with play in a receiving slot 80 of a stabilizing element 64.
- the said game with which the Strömungsleit boots are kept pluggable on the carrier and the individual elements of Strömungsleit respondeden are kept pluggable with each other, depends on material, dimensions and operating temperature level of the gas surface burner and is designed so that neither in the cold state still in the warm operating condition in any part of the gas surface burner, a stress occurs which is greater than 10%, 25%, 50% or 75% of the yield strength or tensile strength of a respective element.
- the game is designed so large that sets neither in the operating or in the cold resting state, a mechanical tension, but in any operating condition at least a slight residual game remains at all pluggable connections.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Gas Burners (AREA)
Description
Die Erfindung betrifft einen Gas-Flächenbrenner mit einem in einer Längsrichtung verlaufenden Gasrohr, an dem in gegenseitigen Abständen eine Vielzahl von Gasdüsen gehalten sind, deren Austrittsachsen parallel zueinander und quer zur Längsrichtung angeordnet sind, und mit einer Vielzahl von Strömungsleiteinrichtungen, denen jeweils mindestens eine Gasdüse zugeordnet ist, wobei benachbart zu dem Gasrohr ein in Längsrichtung verlaufender Träger angeordnet ist, an dem die Strömungsleiteinrichtungen gehalten sind.The invention relates to a gas surface burner with a gas pipe extending in a longitudinal direction, at the spaced a plurality of gas nozzles are held, whose outlet axes are arranged parallel to each other and transverse to the longitudinal direction, and with a plurality of Strömungsleiteinrichtungen, each having at least one gas nozzle is assigned, wherein adjacent to the gas pipe, a longitudinally extending carrier is arranged, on which the flow guide means are held.
Ein derartiger Gas-Flächenbrenner ist beispielsweise aus der
Dabei besteht das Problem, dass die gesamte Anordnung aufgrund der erheblichen Temperaturunterschiede einerseits zwischen Betriebs- und Ruhezustand und andererseits zwischen den Strömungsleiteinrichtungen und dem Gasrohr erheblichen unterschiedlichen thermischen Materialausdehnungen unterworfen ist, was nachteilig ist, weil die Strömungsleiteinrichtungen fest mit dem Träger verbunden bzw. verschraubt sind.In this case, there is the problem that the entire arrangement is subjected to considerable differences in thermal material expansions due to the considerable temperature differences on the one hand between operating and resting state and on the other hand between the Strömungsleiteinrichtungen and the gas pipe, which is disadvantageous because the Strömungsleiteinrichtungen are firmly connected to the carrier or screwed ,
Die Aufgabe der Erfindung besteht darin, den vorgenannten Nachteil zu beseitigen. Diese Aufgabe wird erfindungsgemäß bei einem gattungsgemäßen Gas-Flächenbrenner durch die Maßnahme gelöst, dass die Strömungsleiteinrichtungen mit Spiel steckbar an dem Träger gehalten sind und von dem Träger und dem Gasrohr mechanisch entkoppelt sind.The object of the invention is to eliminate the aforementioned disadvantage. This object is achieved in a generic gas surface burner by the Solved measure that the Strömungsleiteinrichtungen are held with play pluggable on the carrier and are mechanically decoupled from the carrier and the gas pipe.
Dadurch sind die Strömungsleiteinrichtungen, die im Betrieb erhebliche Temperaturen annehmen können, sowohl von dem Träger als auch von dem Gasrohr mechanisch entkoppelt, so dass unvermeidlich auftretende thermische Materialdehnungen nicht zu unzuträglichen Spannungen im Träger oder im Gasrohr führen können.As a result, the flow guiding devices, which can assume considerable temperatures during operation, are mechanically decoupled from both the carrier and the gas pipe, so that unavoidable thermal expansion of the material can not lead to unacceptable stresses in the carrier or in the gas pipe.
Bevorzugt ist vorgesehen, dass die Strömungsleiteinrichtungen lösbar, insbesondere werkzeuglos lösbar an dem Träger gehalten sind, so dass die Strömungsleiteinrichtungen problemlos von dem Träger abgenommen bzw. ausgetauscht werden können.It is preferably provided that the flow-guiding devices are detachably, in particular releasably detachable, held on the carrier without tools, so that the flow-guiding devices can be easily removed or exchanged from the carrier.
Es kann vorgesehen sein, dass der Träger das Gasrohr mit Abstand wenigstens teilweise umschließt und mit Austrittsachsen der Gasdüsen fluchtende Brenngasaustrittsöffhungen aufweist.It can be provided that the carrier at least partially surrounds the gas pipe at a distance and has aligned fuel gas outlet openings with outlet axes of the gas nozzles.
Es ist zweckmäßig, wenn der Träger als ein das Gasrohr mit Abstand umschließendes Trägerrohr ausgebildet ist, das im Querschnitt zylindrisch oder oval sein kann. Das Gasrohr kann konzentrisch oder exzentrisch in dem Trägerrohr angeordnet sein, und zwar zweckmäßigerweise exzentrisch entgegen einer Gasaustrittsrichtung aus den Gasdüsen.It is expedient if the carrier is designed as a carrier tube surrounding the gas tube at a distance, which may be cylindrical or oval in cross-section. The gas pipe may be arranged concentrically or eccentrically in the support tube, and suitably eccentrically against a gas outlet direction from the gas nozzles.
Der Gas-Flächenbrenner kann in einem Kanal angeordnet sein, der zwei gegenüberliegende, quer zur Längsrichtung verlaufende Kanalwände aufweist, wobei das Gasrohr an einem Zufuhrende an einer ersten Kanalwand fest haltbar und an einem gegenüberliegenden geschlossenen Ende an einer zweiten Kanalwand zum Wärmedehnungsausgleich in Längsrichtung verlagerbar geführt ist. Entsprechend kann vorgesehen sein, dass der Träger an einem ersten Ende an der ersten Kanalwand fest haltbar und an einem gegenüberliegenden zweiten Ende an der zweiten Kanalwand zum Wärmedehnungsausgleich in Längsrichtung verlagerbar geführt ist.The gas surface burner may be arranged in a channel which has two opposite transverse to the longitudinal direction of the channel walls, wherein the gas pipe at a Supply end firmly fixed to a first channel wall and is guided displaceably in the longitudinal direction at an opposite closed end on a second channel wall for thermal expansion compensation. Accordingly, it can be provided that the support is firmly held at a first end to the first channel wall and displaceable in the longitudinal direction at an opposite second end on the second channel wall for thermal expansion compensation.
Jede Strömungsleiteinrichtung kann mindestens ein an dem Träger gehaltenes Befestigungselement und mindestens ein mittels des Befestigungselements gehaltenes Strömungsleitelement aufweisen, wobei das Befestigungselement an dem Träger und das mindestens eine Strömungsleitelement an dem Befestigungselement mit Spiel steckbar und insbesondere lösbar gehalten ist.Each flow-guiding device can have at least one fastening element held on the support and at least one flow-guiding element held by the fastening element, wherein the fastening element is held on the support and the at least one flow-guiding element can be plugged and in particular releasably secured to the fastening element.
Dabei ist zweckmäßigerweise vorgesehen, dass jedes Strömungsleitelement zwei mit Abstand in Längsrichtung angeordnete Befestigungsplatten aufweist, die mit Befestigungslaschen mit Spiel in Halteschlitze des Trägers eingreifen, wobei mindestens eine Befestigungslasche einer Befestigungsplatte eine Sicherungsöffuung aufweist, die sich im Montagezustand auf einer von dem übrigen Teil der Befestigungsplatte abgekehrten Seite des Trägers befindet und in die mindestens ein Sicherungselement einsteckbar ist. Die Befestigungsplatten sind bevorzugt quer zur Längsachse orientiert.It is expediently provided that each flow guide has two spaced longitudinally arranged mounting plates which engage with fastening tabs with clearance in retaining slots of the carrier, wherein at least one fastening tab of a mounting plate has a Sicherungsöffuung, in the assembled state on one of the remaining part of the mounting plate located on the opposite side of the carrier and in the at least one securing element can be inserted. The attachment plates are preferably oriented transversely to the longitudinal axis.
Das mindestens eine Sicherungselement kann stangenförmig sein und sämtliche Befestigungsplatten gleichzeitig sichern, indem es in die in Längsrichtung fluchtenden Sicherungsöffnungen aller Befestigungsplatten eingreift.The at least one securing element may be bar-shaped and secure all mounting plates simultaneously by engaging in the longitudinally aligned securing openings of all mounting plates.
Es kann vorgesehen sein, dass von zwei Befestigungsplatten einer Strömungsleiteinrichtung mindestens ein Strömungsleitelement gehalten ist, das mit Haltelaschen mit Spiel in Aufnahmeschlitze der Befestigungsplatten eingreift.It can be provided that at least one flow guide is held by two mounting plates of a flow guide, which engages with retaining tabs with clearance in receiving slots of the mounting plates.
Bevorzugt ist vorgesehen, dass das mindestens eine Strömungsleitelement im Montagezustand der Befestigungsplatten unverlierbar von den Aufnahmeschlitzen gehalten ist.It is preferably provided that the at least one flow guide is held captive by the receiving slots in the mounting state of the mounting plates.
Es kann vorgesehen sein, dass das mindestens eine Sicherungselement mit Spiel in die Sicherungsöffnungen eingreift.It can be provided that the at least one securing element engages with play in the securing openings.
Jede Strömungsleiteinrichtung kann bezüglich einer die Längsachse und die Austrittsachsen der Gasdüsen enthaltenden Symmetrieebene symmetrisch angeordnete Strömungsleitelemente aufweisen. Jedes Strömungsleitelement kann zwei mit Abstand und insbesondere konzentrisch zu dem Trägerrohr verlaufende Abschirmelemente und zwei radial verlaufende Stabilisierungselemente umfassen. Zwischen jedem Abschirmelement und dem Trägerrohr kann ein Zwischenraum oder Strömungsraum gebildet sein. Zwischen jedem Stabilisierungselement und dem Trägerrohr kann ein Abstand bestehen, wodurch ein Strömungseintrittsbereich in den Strömungsraum gebildet ist.Each flow-guiding device can have flow-guiding elements arranged symmetrically with respect to a plane of symmetry containing the longitudinal axis and the exit axes of the gas nozzles. Each flow-guiding element may comprise two shielding elements extending at a distance and in particular concentrically with respect to the carrier tube, and two radially extending stabilizing elements. Between each shielding element and the carrier tube, a gap or flow space may be formed. There may be a spacing between each stabilizing element and the carrier tube, whereby a flow inlet region is formed in the flow space.
Weitere Vorteile und Merkmale der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines AusfĂĽhrungsbeispiels, wobei auf eine Zeichnung Bezug genommen ist, in der
- Figur 1
- eine Seitenansicht eines erfindungsgemäßen Gas-Flächenbrenners in einer Anordnung zwischen zwei Kanalwänden zeigt,
Figur 2- eine Querschnittansicht des Gas-Flächenbrenners zeigt,
- Figur 3
- eine perspektivische Ansicht des Gas-Flächenbrenners nach
Figur 1 zeigt, wobei zwei im Bereich der Kanalwände angeordnete Befestigungsteile dargestellt sind, - Figur 4
- eine teilweise zerlegte Einzelansicht einer Strömungsleiteinrichtung an einem Trägerrohr zeigt,
- Figur 5
- eine perspektivische Längsschnittansicht des Trägerrohrs zeigt, mit einem stabförmigen Sicherungselement für eine Anzahl von Befestigungsplatten, und
- Figur 6
- eine endseitige, in Längsrichtung verlagerbare Halterung von Trägerrohr und Gasrohr an einer Lagerplatte im Bereich einer Kanalseitenwand zeigt.
- FIG. 1
- shows a side view of a gas surface burner according to the invention in an arrangement between two channel walls,
- FIG. 2
- shows a cross-sectional view of the gas surface burner,
- FIG. 3
- a perspective view of the gas surface burner after
FIG. 1 shows, wherein two arranged in the region of the channel walls fasteners are shown, - FIG. 4
- shows a partially disassembled detail of a flow guide on a support tube,
- FIG. 5
- shows a perspective longitudinal sectional view of the support tube, with a rod-shaped securing element for a number of mounting plates, and
- FIG. 6
- shows an end, longitudinally displaceable support of support tube and gas pipe to a bearing plate in the region of a channel side wall.
Das Gasrohr 10 und das Trägerrohr 14 sind an der ersten Kanalwand 6 fixiert und im Bereich der zweiten Kanalwand 8 in Längsrichtung 18 gesehen verschieblich gelagert, um im Betrieb auftretende Wärmedehnungen aufzufangen.The
Das Trägerrohr 14 erstreckt sich ebenfalls in Längsrichtung 18 und umschließt das Gasrohr 10, wobei das Trägerrohr konzentrisch oder exzentrisch bezüglich des Gasrohrs 10 angeordnet sein kann.
Das Trägerrohr 14 weist im Bereich einer jeden Gasdüse 34 benachbart und gegenüber der jeweiligen Gasdüse 34, mit dessen Austrittsachse 34a, fluchtend, eine Brenngasaustrittsöffuung 42 auf, und auf einer gegenüberliegenden Seite zwei Strömungseintrittsöffnungen 44. Von dem Gas-Flächenbrenner aufzuheizendes Gas, das in Anströmrichtung 40 anströmt und einen Sauerstoffanteil aufweist, bspw. Rauchgas oder Abgas wie Gasturbinenabgas, kann durch die Strömungseintrittsöffnungen 44 teilweise in das Trägerrohr 14 eintreten, wobei es das Gasrohr 10 umströmt und mit aus der Gasdüse 34 ausströmendem Brenngas teilweise vermischt, aus der Brenngasaustrittsöffnung 42 ausströmt. Je nach Geschwindigkeit des anströmenden Gases wird das Ein- und Ausströmen des in bzw. aus dem Trägerrohr 14 zu einem mehr oder weniger großen Anteil durch den Impuls des aus der Gasdüse 34 ausströmenden Brenngases induziert.The
Wie in
Die Befestigungsplatten 52 dienen der Halterung der eigentlichen Strömungsleitelemente an dem Trägerrohr 14, wobei im dargestellten Beispiel zwei Paare von Strömungsleitelementen vorhanden sind, jeweils bestehend aus einem Abschirmelement 62 und einem Stabilisierungselement 64, die symmetrisch zu einer die Längsachse und die Austrittsachsen 34a der Gasdüsen 34 enthaltenden Symmetrieebene 66 (
Zwischen den Abschirmelementen 62 und dem Trägerrohr 14 besteht in radialer Richtung ein Zwischenraum, wodurch ein Strömungsraum 65 gebildet ist, durch den in Anströmrichtung 40 anströmendes Gas einströmt und durch die Austrittsöffnung 68 ausströmt, gemeinsam mit dem aus der Gasdüse 34 austretenden Brenngas und dem durch die Strömungseintrittsöffnung 44 ein- und aus der Brenngasaustrittsöffnung 42 ausgetretenen, ausströmenden Gas. Jedes Stabilisierungselement 64 ist in einem radialen Abstand von dem Trägerrohr 14 angeordnet (
Wie insbesondere
In entsprechender Weise ist jedes Stabilisierungselement 64 mit vier Haltelaschen 74 versehen, die jeweils mit Spiel in einen Aufnahmeschlitz 76 der Befestigungsplatten 52 eingreifen. Zwecks zusätzlicher Sicherung ist ferner jedes Abschirmelement 62 mit einer weiteren Haltelasche 78 versehen, die jeweils mit Spiel in einen Aufnahmeschlitz 80 eines Stabilisierungselements 64 eingreift.In a corresponding manner, each stabilizing
Das genannte Spiel, mit dem die Strömungsleiteinrichtungen an dem Träger steckbar gehalten sind und die einzelnen Elemente der Strömungsleiteinrichtungen untereinander steckbar gehalten sind, hängt von Material, Abmessungen und Betriebstemperaturniveau des Gas Flächenbrenners ab und ist so ausgelegt, dass weder im kalten Zustand noch im betriebswarmen Zustand in irgendeinem Teil des Gas-Flächenbrenners eine mechanische Spannung auftritt, die größer ist als 10 %, 25 %, 50 % oder 75 % der Streckgrenze oder Zugfestigkeit eines jeweiligen Elements. Bevorzugt ist das Spiel so groß ausgelegt, dass sich weder im Betriebs- noch im kalten Ruhezustand eine mechanische Spannung einstellt, sondern in jedem Betriebszustand zumindest noch ein geringfügiges restliches Spiel an allen steckbaren Verbindungen verbleibt.The said game, with which the Strömungsleiteinrichtungen are kept pluggable on the carrier and the individual elements of Strömungsleiteinrichtungen are kept pluggable with each other, depends on material, dimensions and operating temperature level of the gas surface burner and is designed so that neither in the cold state still in the warm operating condition in any part of the gas surface burner, a stress occurs which is greater than 10%, 25%, 50% or 75% of the yield strength or tensile strength of a respective element. Preferably, the game is designed so large that sets neither in the operating or in the cold resting state, a mechanical tension, but in any operating condition at least a slight residual game remains at all pluggable connections.
- 22
- Gas-FlächenbrennerGas surface burner
- 44
- Kanalchannel
- 66
- erste Kanalwandfirst channel wall
- 88th
- zweite Kanalwandsecond channel wall
- 1010
- Gasrohrgas pipe
- 1212
- Gasanschlussgas connection
- 1414
- Trägerrohr (Träger)Carrier tube (carrier)
- 1616
- Strömungsleiteinrichtungflow guide
- 1818
- Längsrichtunglongitudinal direction
- 2020
- Befestigungsteilattachment portion
- 2222
- Lagerplattebearing plate
- 2424
- Lagerungstorage
- 2626
- ZĂĽnderfuze
- 2828
- FlammenĂĽberwachungflame monitoring
- 3030
- Rollerole
- 3434
- GasdĂĽsegas nozzle
- 34a34a
- Austrittsachseexit axis
- 4040
- Anströmrichtungflow direction
- 4242
- BrenngasaustrittsöffnungFuel gas outlet opening
- 4444
- StrömungseintrittsöffnungFlow inlet opening
- 5252
- Befestigungsplatte (Befestigungselement)Fixing plate (fixing element)
- 5454
- Befestigungslaschemounting tab
- 5656
- Halteschlitzretaining slot
- 5858
- Sicherungsöffnungsecuring aperture
- 6060
- Sicherungselementfuse element
- 6262
- Abschirmelementshielding
- 6464
- Stabilisierungselementstabilizing element
- 64a64a
- StrömungseintrittsbereichFlow inlet area
- 6565
- Strömungsraumflow chamber
- 6666
- Symmetrieebeneplane of symmetry
- 6868
- Austrittsöffnungoutlet opening
- 7070
- Haltelascheretaining tab
- 7474
- Haltelascheretaining tab
- 7878
- Haltelascheretaining tab
- 7272
- Aufnahmeschlitzreceiving slot
- 7676
- Aufnahmeschlitzreceiving slot
- 8080
- Aufnahmeschlitzreceiving slot
Claims (16)
- Gas grid burner (2) comprising a gas pipe (10), running in a longitudinal direction (18), on which at mutual distances a plurality of gas nozzles (34) is held, whose outlet axes (34a) are arranged parallel to one another and transversely to the longitudinal direction (18) with a plurality of flow-guiding devices (16), to which at least one gas nozzle (34) is assigned in each case and comprising a support (14), running adjacent to the gas pipe (10) in the longitudinal direction (18), on which the flow-guiding devices (16) are held, characterized in that the flow-guiding devices are held with play on the support (14) so that they can be plugged there into and are mechanically disconnected from the support (14) and the gas pipe (10).
- Gas grid burner according to claim 1, characterized in that the flow-guiding devices (16) are held detachably on the support (14), in particular detachably without tools.
- Gas grid burner according to one of the preceding claims, characterized in that the support (14) at least partly encloses the gas pipe (10) with a gap and has fuel gas outlet apertures (42) flush with outlet axes (34a) of the gas nozzles (34).
- Gas grid burner according to one of the preceding claims, characterized in that the support is embodied as a support tube (14) enclosing the gas pipe (10) with a gap.
- Gas grid burner according to claim 4, characterized in that the gas pipe (10) is arranged concentrically or eccentrically in the support tube (14).
- Gas grid burner according to one of the preceding claims, characterized in that the gas grid burner can be placed in a duct (4), which has two facing duct walls (6, 8), running transversely to the longitudinal direction (18), wherein the gas pipe (10) at a supply end is firmly held stably on a first duct wall (6) and at a facing closed end movably held on a second duct wall (8) to balance out heat expansion.
- Gas grid burner according to claim 6, characterized in that the support (14) at a first end is firmly held stably on the first duct wall (6) and at a facing second end is held on the second duct wall (8) movably in the longitudinal direction (18) to balance out heat expansion.
- Gas grid burner according to one of the preceding claims, characterized in that each flow-guiding device (16) has at least one fastening part (52), held on the support (14), and at least one flow-guiding element (62, 64) held by the fastening part (52), wherein the fastening part (52) is held on the support (14) so that it can be plugged there into and the at least one flow-guiding element (62, 64) is held on the fastening part (52) so that it can be plugged there into and in particular detachably.
- Gas grid burner according to claim 8, characterized in that each flow-guiding device (16) has two fastening plates (52) arranged with spacing in the longitudinal direction (18) which by means of fastening lugs (54) engage with play in retaining slots (56) of the support, wherein at least one support lug (54) of a fastening plate (52) has a securing aperture (58), which in the assembled state is located on a side of the support (14) facing away from the fastening plate (52) and can be plugged into the at least one securing element (60).
- Gas grid burner according to claim 9, characterized in that the at least one securing element (60) secures all fastening plates (52) at the same time.
- Gas grid burner according to claim 10, characterized in that at least one flow-guiding element (62, 64) is held by two fastening plates (52) of a flow-guiding device (16), which by means of lugs (70, 74) engage with play in receiving slots (72, 76) of the fastening plates (52).
- Gas grid burner according to claim 11, characterized in that the at least one flow-guiding element (62, 64) in the assembled state of the fastening plates (52) is held captive by the receiving slots (72, 76).
- Gas grid burner according to claims 9 to 12, characterized in that the at least one securing element engages with play in the securing apertures (58).
- Gas grid burner according to the preceding claims, characterized in that each flow-guiding device (16) relative to a symmetry plane (66) containing the longitudinal axis (18) and the outlet axes (34a) of the gas nozzles (34) has symmetrically arranged flow-guiding elements (62, 64), in particular two shielding elements (62) running at a distance and in particular concentrically to the support tube (14) and two radially-running stabilization elements (64).
- Gas grid burner according to claim 14, characterized in that a flow chamber (65) is formed between each shielding element (62) and the support tube (14).
- Gas grid burner according to claim 15, characterized in that there is a radial gap between each stabilization element (64) and the support tube (14), as a result of which an inlet area is formed to a flow chamber (65).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202015005682.2U DE202015005682U1 (en) | 2015-08-10 | 2015-08-10 | Gas surface burner |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3130850A1 EP3130850A1 (en) | 2017-02-15 |
EP3130850B1 true EP3130850B1 (en) | 2019-11-27 |
Family
ID=54146789
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16178760.1A Active EP3130850B1 (en) | 2015-08-10 | 2016-07-11 | Gas grid burner |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3130850B1 (en) |
DE (1) | DE202015005682U1 (en) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3649211A (en) * | 1970-02-05 | 1972-03-14 | Coen Co | Air augmented duct burner |
US3632286A (en) * | 1970-09-18 | 1972-01-04 | Gen Electric | Dual fuel grid burner |
US3843309A (en) * | 1973-03-07 | 1974-10-22 | Gen Electric | Liquid fuel grid burner for vitiated air using auxiliary combustion air |
JPS6380415U (en) * | 1986-11-17 | 1988-05-27 | ||
US9909462B2 (en) | 2012-10-08 | 2018-03-06 | Nooter/Eriksen, Inc. | Duct burner of HRSG with liner film cooling |
-
2015
- 2015-08-10 DE DE202015005682.2U patent/DE202015005682U1/en not_active Expired - Lifetime
-
2016
- 2016-07-11 EP EP16178760.1A patent/EP3130850B1/en active Active
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
DE202015005682U1 (en) | 2015-08-27 |
EP3130850A1 (en) | 2017-02-15 |
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