EP0796412B1 - Gasbrenner für heizgeräte, insbesondere wassererhitzer - Google Patents
Gasbrenner für heizgeräte, insbesondere wassererhitzer Download PDFInfo
- Publication number
- EP0796412B1 EP0796412B1 EP95936980A EP95936980A EP0796412B1 EP 0796412 B1 EP0796412 B1 EP 0796412B1 EP 95936980 A EP95936980 A EP 95936980A EP 95936980 A EP95936980 A EP 95936980A EP 0796412 B1 EP0796412 B1 EP 0796412B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- burner
- plate
- burner plate
- gas burner
- channels
- 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.)
- Expired - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 15
- 239000002184 metal Substances 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 5
- 239000000446 fuel Substances 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 description 16
- 239000007789 gas Substances 0.000 description 14
- 241000264877 Hippospongia communis Species 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007084 catalytic combustion reaction Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
-
- 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
- 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
- F23D14/18—Radiant burners using catalysis for flameless combustion
-
- 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
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
- F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2203/00—Gaseous fuel burners
- F23D2203/10—Flame diffusing means
- F23D2203/108—Flame diffusing means with stacked sheets or strips forming the outlets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2215/00—Fins
- F28F2215/04—Assemblies of fins having different features, e.g. with different fin densities
Definitions
- the invention is based on gas burners according to the genus Main claim.
- the channels in the burner plate are formed between individual plate elements, the edges of which on the combustion chamber side all lie in a common exit plane.
- the flame roots only touch the burner plate with their apex regions, so that a heat flow that cools the flames via the burner plate into the heat-dissipating medium is only possible to a limited extent. This also restricts the effort for the burner to have as large a surface load as possible if the flame temperature is not to rise to an area which is harmful with respect to the formation of NO x .
- the arrangement according to the invention with the characterizing features of the main claim has the advantage that the flames are cooled in their root area over a defined area extending beyond the apex area so that even higher surface loads of the burner or the burner plate are possible without result in inadmissibly high NO x values.
- the distinctive structuring of the burner plate can be achieved by not between two set back sheet metal ribs a set back or shortened sheet metal rib is provided. At An execution has proven to be particularly advantageous pointed out, in which between two not set back sheet metal ribs two shorter sheet metal ribs are arranged side by side.
- the channels in the burner plate In the formation of the channels in the burner plate is make sure that they have at least one Longitudinal section a width or a diameter have the or the smaller than the so-called Extinguishing distance is so that the flames do not fight back can.
- the Opening diameter or their mesh size is smaller than the rib spacing.
- Burner plate can also be made from an inflow hole provided, connected to the heat-dissipating pipe system Base plate and a variety of on the base plate attached pins are made between the channels form for the passage of the fuel-air mixture.
- the burner plate can consist of a honeycomb structure and an associated base plate exist with the heat-dissipating pipe system connected and in the channels the inflow holes opening into the honeycomb structure is.
- the honeycomb structure is suggested, this by shortened To train inserts in the individual honeycombs.
- the formation of harmful NO x emissions can be further counteracted if the walls of the channels for the fuel / air mixture flowing through are catalytically coated at least in the region of their end sections on the combustion chamber side.
- the burner plate must be designed by appropriate dimensioning or material selection so that the surface temperature is approximately 600 ° C.
- Such a catalytic burner is started in a conventional manner with flames burning freely at the fin or honeycomb ends. After the burner plate has been heated to the operating temperature of the catalyst coating, the flames withdraw into the catalytically active region.
- the gas burner as a heat source for a water heater can be advantageous with the burner plate Pipe system of the water to be heated connected in a heat-conducting manner be flowed through and the pipe system with the burner plate form a heat exchanger unit of the water heater.
- one of the combustion gases of the Gas burner's heat exchanger is smaller than at a version with uncooled burner.
- FIG. 1 shows a water heater with a Gas burner according to the first embodiment
- Figure 2 enlarges the burner plate of the gas burner according to FIG. 1 and Figures 3 and 4 each a modification of the burner plate according to Figure 2.
- Figures 5 and 6 are the burner plates according to the second and third embodiments shown.
- Figure 7 shows a plan view of the Burner plate according to FIG. 6.
- the water heater according to FIG. 1 has a housing 10 a gas burner 12, under which a fuel-air mixture Blower pressure is supplied in the direction of arrow A. Downstream of the gas burner 12 sits in the housing 10 Exhaust gas heat exchanger 14, which is from a pipe system 16th is penetrated, which leads the water to be heated. The Pipe system 16 is via a line 18 to a second Connected pipe system 20, which is integrated into the gas burner 12 is. An ignition device 22 is located downstream of the gas burner 12 attached to the housing 10 for starting the heater.
- the gas burner 12 has a burner plate 24 that is made of sheet ribs 26, 28 of different lengths (FIG. 2) is constructed.
- the sheet metal fins 26, 28 are in good condition thermally conductive contact with the pipe system 20 and are through this connected to a rigid unit.
- Between Sheet metal ribs 26, 28 are column 30 for the passage of the Fuel-air mixture formed.
- the width a of the column 30 is smaller than the so-called extinguishing distance, see above that flames are not in the burner plate 24 or in kick back any mixing zone in front of it can.
- the burner plate 24 is designed so that the shorter ones Sheet metal ribs 28 each between two longer sheet metal ribs 26 stand.
- the arrangement is such that the Margins 32 of the shorter sheet metal fins 28 on the combustion chamber side opposite the edges 34 of the longer sheet metal ribs 26 are reset. This results in the combustion chamber side wall of the burner plate 24 a strong tiered surface structuring with wide Spaces 36 laterally through wall areas 38 of the longer sheet metal ribs 26 are limited.
- the mixture After igniting the burner, the mixture reacts between or at the downstream edges 32, 34 of the Sheet metal fins 26, 28 with flame formation, whereby Heat of reaction from the flame roots over the sheet metal fins 26, 28 reaches the water to be heated in the pipe system 20.
- the flame roots are particularly well cooled, because they also have side contact with the wall areas 38 of the Have sheet metal fins 26.
- the two reaction to the Burner plate 24 resulting combustion gases flow through the exhaust gas heat exchanger 14, where it transfers heat to the one to be heated Dispense water in the pipe system 16.
- the modified version 3 is a burner plate 40, in each case two shortened sheet metal ribs 28 between the longer ones Sheet metal ribs 26 are arranged. This still results wider gaps 42 which the wall on the combustion chamber side structure the burner plate 40 particularly strongly.
- Burner plate 44 made of different long metal ribs 46, 48 built up by the cooling pipe system 20 rigid interconnected and their combustion chamber side End sections are coated catalytically.
- the input side is the burner plate 44 with a Provide lattice structure 50 whose mesh size is smaller than is the width of the gap between the sheet metal fins 46, 48.
- the thermal conductivity of the metal fins 46, 48 is through Dimensioning and / or choice of materials based on the burner output matched that their surface temperature on to Example sets 600 ° C.
- On the metal ribs 46, 48 takes place a catalytic combustion takes place in which compared to the formation of an uncoated version Pollutants is reduced even further.
- the burner is started in a conventional manner one at the ends of the sheet metal fins 46, 48 on the combustion chamber side free burning flame. After heating the sheet metal fins 46, 48 to the operating temperature of the catalyst coating the flame pulls into the catalytically active area the burner plate 44 back.
- FIG 5 is a burner plate 52 with different lengths Pins 54, 56 populated, the channels 58 between them for the Passage of the fuel-air mixture and on the combustion chamber side wider spaces 60 for extensive touching the Form flame roots.
- Pins 54, 56 are on one Fixed base plate 62, the narrow inflow holes 64th is provided for the fuel-air mixture and at the same time.
- a thermally conductive connection to a water leading Pipe system 66 that is, for example extends meandering over the surface of the base plate 62.
- the exemplary embodiment according to FIGS. 6 and 7 differs from the above in that a Burner plate 68 from that connected to the pipe system 66 Base plate 62 and a honeycomb structure 70 attached to it consists. This is made of hexagonal, without any gaps Individual honeycomb 72 formed in the cavities Inflow bores 64 of the base plate 62 open out.
- Burner plate 68 can, as in Figures 6 and 7 on the right the cavities of the individual honeycombs 72 or one is shown Part of the individual honeycombs 72 through on the base plate 62 attached, preferably also honeycomb-shaped inserts 74 be narrowed, which are shorter than the individual honeycombs 72 are and a gradation of the wall of the combustion chamber Effect burner plate.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Geometry (AREA)
- Gas Burners (AREA)
Description
Claims (9)
- Gasbrenner für Heizgeräte, insbesondere Wassererhitzer, mit einer rippenförmig ausgebildeten Brennerplatte, die eine Vielzahl von Kanälen zum Durchtritt eines unter Gebläsedruck zugeführten Brennstoff-Luftgemisches hat, das sich an der Brennerplatte auf Entzündungstemperatur erhitzt und im Bereich der brennraumseitigen Mündungen der Kanäle unter Flammenbildung reagiert, und ferner mit Mitteln zum Kühlen der Brennerplatte und Begrenzen der Flammentemperatur auf Werte, bei denen die NOx-Emissionen des Brenners vorgegebene Grenzen nicht überschreiten, dadurch gekennzeichnet, daß die brennraumseitige Wand der Brennerplatte (24, 40, 44, 52, 68) derart gestuft strukturiert ausgebildet ist, daß die brennraumseitigen Ränder (32) von bestimmten Rippen (28, 48) der Brennerplatte (24, 40, 44, 52, 68) gegenüber den brennraumseitigen Rändern (34) der anderen Rippen (26, 46) der Brennerplatte (24, 40, 44, 52, 68) zurückversetzt sind und daß sich zwischen den an der Brennerplatte anliegenden Flammenwurzeln und den Mündungsrändern (32, 34) der Kanäle (30, 58) definierte Berührungsflächen (38) ergeben, die sich über die Scheitelbereiche der Flammenwurzeln hinweg auch gegen, bzw. in deren Seitenbereiche erstrecken.
- Gasbrenner nach Anspruch 1, dadurch gekennzeichnet, daß jeweils zwischen zwei nicht zurückversetzten Rippen (26, 46) zwei kürzere Rippen (28, 48) nebeneinanderliegend angeordnet sind.
- Gasbrenner nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Brennerplatte (24, 40, 44) aus Blechrippen (26, 28, 46, 48) aufgebaut ist, die durch ein vom wärmeableitenden Medium durchströmten Kühlrohrsystem (20) miteinander verbunden sind und zwischen sich die Kanäle bzw. Spalte (30) für den Durchtritt des Brennstoff-Luftgemisches begrenzen.
- Gasbrenner nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß an der Einströmseite der Brennerplatte (44, 52, 68) eine Gitterstruktur beziehungsweise ein Lochblech (50, 62) vorgesehen ist, deren Maschenweite beziehungsweise dessen Öffnungsdurchmesser kleiner als der Rippenabstand ist.
- Gasbrenner nach Anspruch 1, dadurch gekennzeichnet, daß die Brennerplatte (52) aus einer mit Zuströmbohrungen (64) versehenen, mit dem wärmeableitenden Rohrsystem (66) verbundenen Grundplatte (62) und einer Vielzahl von Stiften (54, 56) besteht, die zwischen sich die Kanäle (58) für den Durchtritt des Brennstoff-Luftgemisches bilden.
- Gasbrenner nach Anspruch 1, dadurch gekennzeichnet, daß die Brennerplatte (68) aus einer Wabenstruktur (70) und einer damit verbundenen Grundplatte (62) besteht, die mit dem wärmeableitenden Rohrsystem (66) verbunden und mit in die Kanäle der Wabenstruktur (70) einmündenden Zuströmbohrungen (64) versehen ist.
- Gasbrenner nach Anspruch 6, dadurch gekennzeichnet, daß die brennraumseitige Wand der Wabenstruktur (70) durch verkürzte Einsätze (74) in deren Einzelwaben (72) gestuft ausgebildet ist.
- Gasbrenner nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Wände der Kanäle für das durchströmende Brennstoff-Luftgemisch mindestens im Bereich ihrer brennraumseitigen Endabschnitte kätalytisch beschichtet sind.
- Gasbrenner nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das mit der Brennerplatte (24, 40, 44, 52, 58) wärmeleitend verbundene Rohrsystem (20, 66) von aufzuheizendem Wasser als wärmeabführendes Medium durchströmt ist und das Rohrsystem mit der Brennerplatte eine Wärmetauschereinheit für einen Wassererhitzer bildet.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4445460 | 1994-12-20 | ||
DE4445460A DE4445460A1 (de) | 1994-12-20 | 1994-12-20 | Gasbrenner für Heizgeräte, insbesondere Wassererhitzer |
PCT/DE1995/001663 WO1996019698A1 (de) | 1994-12-20 | 1995-11-24 | Gasbrenner für heizgeräte, insbesondere wassererhitzer |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0796412A1 EP0796412A1 (de) | 1997-09-24 |
EP0796412B1 true EP0796412B1 (de) | 2001-06-20 |
Family
ID=6536379
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95936980A Expired - Lifetime EP0796412B1 (de) | 1994-12-20 | 1995-11-24 | Gasbrenner für heizgeräte, insbesondere wassererhitzer |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0796412B1 (de) |
JP (1) | JPH10510912A (de) |
KR (1) | KR980700540A (de) |
CN (1) | CN1171150A (de) |
CZ (1) | CZ189897A3 (de) |
DE (2) | DE4445460A1 (de) |
RU (1) | RU2150637C1 (de) |
WO (1) | WO1996019698A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29611338U1 (de) * | 1996-06-18 | 1997-10-16 | Robert Bosch Gmbh, 70469 Stuttgart | Gasbrenner für Heizgeräte |
DE19641040A1 (de) * | 1996-10-04 | 1998-04-23 | Bosch Gmbh Robert | Atmosphärischer Gasbrenner |
DE19718885C2 (de) * | 1997-05-03 | 2003-10-09 | Bosch Gmbh Robert | Gasbrenner |
DE19722863A1 (de) * | 1997-05-31 | 1998-12-03 | Bosch Gmbh Robert | Gasbrenner für Heizgeräte, insbesondere Wassererhitzer |
DE10213132B4 (de) * | 2002-03-23 | 2005-06-02 | Robert Bosch Gmbh | Gasbrenner |
US9976740B2 (en) * | 2012-06-12 | 2018-05-22 | Board of Regents of the Nevada Systems of Higher Educations, on Behalf of the University of Nevada, Reno | Burner |
KR101359551B1 (ko) * | 2012-08-16 | 2014-02-12 | 주식회사 경동나비엔 | 냉각장치를 구비한 예혼합 버너 |
CA2983204C (en) * | 2015-06-30 | 2020-03-10 | Uop Llc | Film temperature optimizer for fired process heaters |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4137905A (en) * | 1972-04-17 | 1979-02-06 | T. I. Domestic Appliances Limited | Gaseous fuel burners |
IT1205556B (it) * | 1986-08-29 | 1989-03-23 | Polidoro Aldo | Testa di bruciatore di gas ottenuta mediante una lamiera punzonata |
GB2223838B (en) * | 1988-09-22 | 1992-07-22 | Padley Dr Peter Joseph | Boiler system |
NL8901559A (nl) * | 1989-06-21 | 1991-01-16 | Nefit Nv | Verwarmingsinrichting. |
AT396017B (de) * | 1990-08-01 | 1993-05-25 | Vaillant Gmbh | Brenner |
NL9200282A (nl) * | 1991-12-16 | 1993-07-16 | Dejatech Bv | Brander, al dan niet geintegreerd in een warmtewisselaar. |
FR2714151B1 (fr) * | 1993-12-22 | 1996-02-02 | Gaz De France | Dispositif d'accrochage de flammes et d'échange de chaleur, brûleur et chauffe-fluide ainsi équipés . |
-
1994
- 1994-12-20 DE DE4445460A patent/DE4445460A1/de not_active Ceased
-
1995
- 1995-11-24 CN CN95196975A patent/CN1171150A/zh active Pending
- 1995-11-24 KR KR1019970704116A patent/KR980700540A/ko active IP Right Grant
- 1995-11-24 EP EP95936980A patent/EP0796412B1/de not_active Expired - Lifetime
- 1995-11-24 RU RU97112464/06A patent/RU2150637C1/ru active
- 1995-11-24 JP JP8519407A patent/JPH10510912A/ja active Pending
- 1995-11-24 DE DE59509357T patent/DE59509357D1/de not_active Expired - Fee Related
- 1995-11-24 WO PCT/DE1995/001663 patent/WO1996019698A1/de active IP Right Grant
- 1995-11-24 CZ CZ971898A patent/CZ189897A3/cs unknown
Also Published As
Publication number | Publication date |
---|---|
RU2150637C1 (ru) | 2000-06-10 |
JPH10510912A (ja) | 1998-10-20 |
CZ189897A3 (en) | 1997-10-15 |
DE4445460A1 (de) | 1996-06-27 |
WO1996019698A1 (de) | 1996-06-27 |
DE59509357D1 (de) | 2001-07-26 |
CN1171150A (zh) | 1998-01-21 |
EP0796412A1 (de) | 1997-09-24 |
KR980700540A (ko) | 1998-03-30 |
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