DE19905781A1 - Burner for water boilers in porous-filled housing uses fill body of ceramic fiber knitwork proof against high temperature over long periods. - Google Patents
Burner for water boilers in porous-filled housing uses fill body of ceramic fiber knitwork proof against high temperature over long periods.Info
- Publication number
- DE19905781A1 DE19905781A1 DE1999105781 DE19905781A DE19905781A1 DE 19905781 A1 DE19905781 A1 DE 19905781A1 DE 1999105781 DE1999105781 DE 1999105781 DE 19905781 A DE19905781 A DE 19905781A DE 19905781 A1 DE19905781 A1 DE 19905781A1
- Authority
- DE
- Germany
- Prior art keywords
- ceramic
- porous body
- ceramic fiber
- burner
- 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.)
- Ceased
Links
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
- F23D14/12—Radiant burners
- F23D14/14—Radiant burners using screens or perforated plates
- F23D14/145—Radiant burners using screens or perforated plates combustion being stabilised at a screen or a perforated plate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2209/00—Safety arrangements
- F23D2209/10—Flame flashback
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2212/00—Burner material specifications
- F23D2212/10—Burner material specifications ceramic
- F23D2212/103—Fibres
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Abstract
Description
Die Erfindung geht aus von einem Brenner, insbesondere für Heizungsanlagen, nach der Gattung des Hauptanspruchs. Es sind Brenner dieser Gattung bekannt, bei denen der poröse Körper aus einem Gestrick aus Draht besteht (DE 195 27 583 A1). Ferner sind Brenner mit einem porösen Körper aus geschäumter Keramik bekannt (DE 43 22 109 A1). Beide bekannten Ausführungen zeigen Probleme bezüglich der Thermoschockbeständigkeit, Strahlungseigenschaften und Porosität.The invention relates to a burner, in particular for Heating systems, according to the genus of the main claim. It Burners of this type are known in which the porous Body consists of a knitted wire (DE 195 27 583 A1). Furthermore, burners are made with a porous body foamed ceramic known (DE 43 22 109 A1). Both known designs show problems regarding the Thermal shock resistance, radiation properties and Porosity.
Die erfindungsgemäße Ausbildung eines Brenners mit den Merkmalen des Hauptanspruchs zeichnet sich durch eine hohe Temperatur- und Temperaturschockbeständigkeit, günstige Strahlungseigenschaften und eine große Robustheit bei der Montage aus. Durch Wahl eines geeigneten Strickverfahrens kann auch die Porosität des Körpers den jeweiligen Ansprüchen leicht angepaßt werden. The inventive design of a burner with the Features of the main claim are characterized by a high Temperature and temperature shock resistance, cheap Radiation properties and great robustness in the Assembly off. By choosing a suitable knitting process can also change the porosity of the body Requirements can be easily adjusted.
Durch die in den Unteransprüchen aufgeführten Merkmale sind vorteilhafte Ausgestaltungen und Weiterbildungen des Gegenstandes des Hauptanspruchs möglich.By the features listed in the subclaims advantageous refinements and developments of Subject of the main claim possible.
Für Brenner, in denen die Reaktion der Verbrennungskomponenten vollständig im porösen Körper stattfindet, wird vorgeschlagen, daß der poröse Körper Strukturen aus hochtemperaturbeständiger Keramik enthält, die bis über 1200°C dauerbelastbar sind.For burners where the reaction of the Combustion components completely in the porous body takes place, it is proposed that the porous body Contains structures made of high temperature resistant ceramic, which can be permanently loaded up to over 1200 ° C.
Das den porösen Körper bildende Gestrick kann vollständig aus keramischem Fasermaterial bestehen. In manchen Fällen kann es auch vorteilhaft sein, keramische Strukturen aus Fasermaterial mit unterschiedlichen Strahlungseigenschaften einzusetzen, um diesbezüglichen Ansprüchen an den Brenner noch besser gerecht zu werden.The knitted fabric forming the porous body can be complete consist of ceramic fiber material. In some cases it can also be advantageous to use ceramic structures Fiber material with different radiation properties to use in this regard to the burner to meet even better.
Zur Versteifung und weiteren Erhöhung der Elastizität des porösen Körpers wird vorgeschlagen, daß das Gestrick aus keramischem Fasermaterial und metallischen Drähten besteht. Für die metallischen Drähte kommen hitzebeständige Metalllegierungen in Frage, wie z. B. die Legierung 1.4765. Bei den so gemischten Gestricken kann die Maschenweite größer als bei den reinen Keramikgestricken gewählt werden, weil die Metalldrähte auch relativ große Maschen offenhalten und so eine gewünschte hohe Porosität des Gestrickes garantieren.To stiffen and further increase the elasticity of the porous body it is suggested that the knitted fabric ceramic fiber material and metallic wires. Heat-resistant come for the metallic wires Metal alloys in question, such as. B. the alloy 1.4765. With the knitted fabrics mixed in this way, the mesh size can be chosen larger than the pure ceramic knitted fabrics, because the metal wires also keep relatively large meshes open and so a desired high porosity of the knitted fabric to guarantee.
Die Temperaturbeständigkeit des porösen Körpers kann weiter erhöht werden, wenn die Keramikfasern bzw. die Drähte des Gestrickes von einer durch Tauchen gebildeten keramischen Beschichtungsmasse umhüllt sind. Als Tauch- bzw. Beschichtungsmasse eignet sich eine Aluminium-Oxid- Verbindung. Derart behandelte Gestricke ähneln in ihren Eigenschaften keramischen Schäumen, können aber im Gegensatz zu diesen mit einer größeren Porosität hergestellt werden.The temperature resistance of the porous body can further be increased if the ceramic fibers or the wires of the Knitted from a ceramic formed by dipping Coating mass are encased. As a diving or Coating compound is an aluminum oxide Connection. Knitted fabrics treated in this way are similar in their Properties of ceramic foams, however, can be in contrast to be made with greater porosity.
Die keramischen Fasern werden ähnlich wie Textilfasern oder Draht vorzugsweise auf Rundstrickmaschinen verarbeitet. Die darauf hergestellten Gestrickschläuche lassen sich auf verschiedene Arten zu Körpern bzw. Packungen mit der dem Brennraum angepaßten Gestalt verformen. So können flachgedrückte Gestrickschläuche zu zylindrischen Körpern gewickelt oder zu quaderförmigen Packungen gefaltet werden. Zur Bildung von ringförmigen Packungen können auch die Gestrickschläuche in sich aufgerollt werden.The ceramic fibers are similar to textile fibers or Wire preferably processed on circular knitting machines. The knitted hoses produced on it can be opened different types of bodies or packs with the Deform the combustion chamber to match the shape. So can flattened knitted hoses to form cylindrical bodies wrapped or folded into cuboid packs. To form annular packs, the Knitted hoses can be rolled up.
Besonders vorteilhaft ist es, wenn der poröse Körper aus einer gewellten Strickmatte gebildet ist. Je nach Wellung ergibt sich eine unterschiedlich große Porosität. Gewellte Gestricke lassen sich daher den Erfordernissen der Verbrennung gut anpassen. Bei gewellten Mischgestricken aus Keramikfasern und Drähten sorgen die Drähte dafür, daß die Wellung bei der weiteren Verformung bzw. Faltung erhalten bleibt.It is particularly advantageous if the porous body is made of a corrugated knitting mat is formed. Depending on the curl the porosity varies. Corrugated Knitted fabrics can therefore meet the requirements of Adjust combustion well. With corrugated knitted fabrics Ceramic fibers and wires ensure that the wires Corrugation obtained during further deformation or folding remains.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Fig. 1 einen Längsschnitt durch den erfindungsgemäßen Brenner, Fig. 2 in räumlicher Darstellung eine Packung zur Bildung des porösen Körpers nach Fig. 1 und Fig. 3 eine alternative Ausführung einer porösen Packung und deren Ausgangsgestalt. An embodiment of the invention is shown in the drawing and explained in more detail in the following description. In the drawings Fig. 1 shows a longitudinal section through the inventive burner, Fig. 2 in a spatial representation, a pack to form the porous body of FIG. 1 and FIG. 3, an alternative embodiment of a porous pack and the output shape.
Ein als Wärmequelle für Heizungswasser dienender Brenner 10 hat ein Gehäuse 12, mit einer Einlaßöffnung 14 für ein Gas- Luftgemisch, die in eine Vorkammer 16 mündet. An diese schließt sich ein konventioneller Flammenhalter 17 bzw. eine Rückschlagsicherung an, durch die das Gas-Luftgemisch in eine Brennkammer 18 gelangt, die mit einem porösen Körper 20 ganz oder teilweise ausgefüllt ist und in die eine am Gehäuse 12 befestigte Zündeinrichtung 22 hineinragt. Die Brennkammer 18 ist von einem Wärmetauscher 24 umgeben, der eine Heizungswasser führende Rohrschlange 26 enthält, die am Gehäuse 12 wärmeleitend anliegt. Die Brennkammer 18 selbst kann auch zweischalig aufgebaut sein; im Zwischenraum fließt dann das Heizungswasser. Im porösen Körper 20 verbrennt das Gas-Luftgemisch ohne sichtbare Flamme, wobei ein Teil der erzeugten Wärme von der gekühlten Brennkammer 18 aufgenommen wird. Das Abgas tritt am unteren Ende 28 aus der Brennkammer 18 aus, von wo es gegebenenfalls über einen Abgaswärmetauscher weiter abgekühlt und ins Freie abgeleitet wird.A burner 10 serving as a heat source for heating water has a housing 12 with an inlet opening 14 for a gas-air mixture, which opens into a prechamber 16 . This is followed by a conventional flame holder 17 or a kickback device, through which the gas-air mixture reaches a combustion chamber 18 , which is completely or partially filled with a porous body 20 and into which an ignition device 22 attached to the housing 12 projects. The combustion chamber 18 is surrounded by a heat exchanger 24 which contains a pipe coil 26 which carries heating water and which bears on the housing 12 in a heat-conducting manner. The combustion chamber 18 itself can also be constructed with two shells; the heating water then flows in the gap. The gas-air mixture burns in the porous body 20 without a visible flame, with some of the heat generated being absorbed by the cooled combustion chamber 18 . The exhaust gas emerges from the combustion chamber 18 at the lower end 28 , from where it may be further cooled via an exhaust gas heat exchanger and discharged to the outside.
Der poröse Körper 20 besteht aus einem Gestrick aus keramischem Fasermaterial, das zunächst auf einer Rundstrickmaschine zu einem Schlauch verarbeitet wird, der danach quer zur Schlauchachse zu einer Packung 30 zusammengequetscht wird. Der poröse Körper 20 kann nun durch Falten der Packung 30 oder aus mehreren übereinander gelegten Packungen 30 gebildet sein.The porous body 20 consists of a knitted fabric made of ceramic fiber material, which is first processed into a tube on a circular knitting machine, which is then squeezed into a package 30 transverse to the tube axis. The porous body 20 can now be formed by folding the package 30 or from a plurality of packages 30 placed one above the other.
Bei der alternativen Ausführung nach Fig. 3 hat eine aus Keramikgestrick bestehende Packung 32 die Form eines Ringes, der durch Einrollen eines Gestrickschlauches 34 gebildet ist.In the alternative embodiment according to FIG. 3, a package 32 made of ceramic knitted fabric has the shape of a ring which is formed by rolling in a knitted tube 34 .
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1999105781 DE19905781A1 (en) | 1999-02-12 | 1999-02-12 | Burner for water boilers in porous-filled housing uses fill body of ceramic fiber knitwork proof against high temperature over long periods. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1999105781 DE19905781A1 (en) | 1999-02-12 | 1999-02-12 | Burner for water boilers in porous-filled housing uses fill body of ceramic fiber knitwork proof against high temperature over long periods. |
Publications (1)
Publication Number | Publication Date |
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DE19905781A1 true DE19905781A1 (en) | 2000-08-24 |
Family
ID=7897225
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE1999105781 Ceased DE19905781A1 (en) | 1999-02-12 | 1999-02-12 | Burner for water boilers in porous-filled housing uses fill body of ceramic fiber knitwork proof against high temperature over long periods. |
Country Status (1)
Country | Link |
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DE (1) | DE19905781A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10115644A1 (en) * | 2000-12-12 | 2002-06-20 | Bosch Gmbh Robert | Gas burner has porous body, mixture of fuel and air being fed through tube which narrows towards top, so that gas mixture is fed through gap between it and burner sides, while main supply passes through perforated plate at base of burner. |
DE10100730A1 (en) * | 2001-01-10 | 2002-07-18 | Bosch Gmbh Robert | Gas burner, for a water heater, has a porous body with a gas/air mixture with a high air content fed in at the inflow side and a further gas/air mixture with a low air content or pure gas is delivered to displaced zones |
DE10155226A1 (en) * | 2001-11-09 | 2003-05-28 | Bosch Gmbh Robert | Heating appliance with burner has porous body in water-cooled burner chamber extending over entire cross-section thereof and with heat guide paths starting from centre of body and ending in inside wall area of chamber |
DE10201753A1 (en) * | 2002-01-18 | 2003-08-07 | Bosch Gmbh Robert | Useful output heating has cross section of heat exchanger's closed chamber reducing in upwards direction and changing into gas outlet, with protruding cooling ribs formed on inner wall of heat exchanger |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT93479B (en) * | 1918-06-17 | 1923-07-10 | Eugen Szoecs | Refractory incandescent body for burning gaseous or vaporous fuels. |
US3912443A (en) * | 1972-09-25 | 1975-10-14 | Foseco Int | Radiant gas burners |
DE4016157A1 (en) * | 1989-06-08 | 1990-12-13 | Asea Brown Boveri | High temp. fuel cell stack - with cells series-connected by separator plates and elastic current collectors |
US5249953A (en) * | 1989-06-16 | 1993-10-05 | Hercules Canada, Inc. | Gas distributing and infrared radiating block assembly |
WO1994029646A1 (en) * | 1993-06-07 | 1994-12-22 | Carswell Martin G | Unsintered fiber burner made with metal fibers |
DE19527583A1 (en) * | 1995-07-28 | 1997-01-30 | Max Rhodius Gmbh | Burner for central heating installation - has combustion chamber filled with specified packing comprising cavities to create defined flame zone |
DE19753249A1 (en) * | 1997-12-01 | 1999-06-24 | Fraunhofer Ges Forschung | Ceramic network, process for its production and use |
-
1999
- 1999-02-12 DE DE1999105781 patent/DE19905781A1/en not_active Ceased
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT93479B (en) * | 1918-06-17 | 1923-07-10 | Eugen Szoecs | Refractory incandescent body for burning gaseous or vaporous fuels. |
US3912443A (en) * | 1972-09-25 | 1975-10-14 | Foseco Int | Radiant gas burners |
DE4016157A1 (en) * | 1989-06-08 | 1990-12-13 | Asea Brown Boveri | High temp. fuel cell stack - with cells series-connected by separator plates and elastic current collectors |
US5249953A (en) * | 1989-06-16 | 1993-10-05 | Hercules Canada, Inc. | Gas distributing and infrared radiating block assembly |
WO1994029646A1 (en) * | 1993-06-07 | 1994-12-22 | Carswell Martin G | Unsintered fiber burner made with metal fibers |
DE19527583A1 (en) * | 1995-07-28 | 1997-01-30 | Max Rhodius Gmbh | Burner for central heating installation - has combustion chamber filled with specified packing comprising cavities to create defined flame zone |
DE19753249A1 (en) * | 1997-12-01 | 1999-06-24 | Fraunhofer Ges Forschung | Ceramic network, process for its production and use |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10115644A1 (en) * | 2000-12-12 | 2002-06-20 | Bosch Gmbh Robert | Gas burner has porous body, mixture of fuel and air being fed through tube which narrows towards top, so that gas mixture is fed through gap between it and burner sides, while main supply passes through perforated plate at base of burner. |
DE10115644C2 (en) * | 2000-12-12 | 2003-01-09 | Bosch Gmbh Robert | Gas burner with a porous material burner |
DE10100730A1 (en) * | 2001-01-10 | 2002-07-18 | Bosch Gmbh Robert | Gas burner, for a water heater, has a porous body with a gas/air mixture with a high air content fed in at the inflow side and a further gas/air mixture with a low air content or pure gas is delivered to displaced zones |
DE10100730C2 (en) * | 2001-01-10 | 2002-11-07 | Bosch Gmbh Robert | Gas burner for a water heater |
DE10155226A1 (en) * | 2001-11-09 | 2003-05-28 | Bosch Gmbh Robert | Heating appliance with burner has porous body in water-cooled burner chamber extending over entire cross-section thereof and with heat guide paths starting from centre of body and ending in inside wall area of chamber |
DE10155226B4 (en) * | 2001-11-09 | 2015-10-22 | Robert Bosch Gmbh | Heater with a burner with pore body |
DE10201753A1 (en) * | 2002-01-18 | 2003-08-07 | Bosch Gmbh Robert | Useful output heating has cross section of heat exchanger's closed chamber reducing in upwards direction and changing into gas outlet, with protruding cooling ribs formed on inner wall of heat exchanger |
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Legal Events
Date | Code | Title | Description |
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OP8 | Request for examination as to paragraph 44 patent law | ||
8131 | Rejection |