EP0385137B1 - Boiler equipped with a downstream burner - Google Patents
Boiler equipped with a downstream burner Download PDFInfo
- Publication number
- EP0385137B1 EP0385137B1 EP90102287A EP90102287A EP0385137B1 EP 0385137 B1 EP0385137 B1 EP 0385137B1 EP 90102287 A EP90102287 A EP 90102287A EP 90102287 A EP90102287 A EP 90102287A EP 0385137 B1 EP0385137 B1 EP 0385137B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flap
- flue gas
- boiler
- width
- burner
- 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
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Classifications
-
- 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
- F24H9/00—Details
- F24H9/0005—Details for water heaters
- F24H9/001—Guiding means
- F24H9/0026—Guiding means in combustion gas channels
- F24H9/0031—Guiding means in combustion gas channels with means for changing or adapting the path of the flue gas
-
- 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
- F24H9/00—Details
- F24H9/0005—Details for water heaters
- F24H9/0036—Dispositions against condensation of combustion products
Definitions
- the invention relates to a lint burner boiler with power-adjustable burner and, exhaust gas temperature control according to the preamble of the main claim.
- Such boilers are known, for example, from DE-A-35 36 627, which, however, is not a fall burner boiler and for which there is also no power-controlled burner.
- oil or gas fan burners are increasingly being used, which can be operated with graded or so-called modulating output in order to be able to adjust the burner output accordingly in times of lower heat requirements.
- modulating output in order to be able to adjust the burner output accordingly in times of lower heat requirements.
- the invention is therefore based on the object to improve a boiler of the type mentioned when used as a fall burner boiler in such a way that a more optimal exhaust gas temperature control can be effected automatically with simple means and measures, associated with the proviso that the desired high exhaust gas temperature for a direct route the flue gases to the flue gas outlet connection of the boiler.
- This inventive design ensures that in times of lower heat requirements, i.e. low burner output, the heating or flue gases can flow out to a large extent through the flue gas duct exposed when the flap is open, but care is taken to ensure that both the flue gas duct and the flue gas duct Resistance as well as the heat transfer area are significantly reduced, so that the heating gases flowing through there can only emit little heat and get into the fume cupboard at a relatively high temperature level. From the boiler design, this can be achieved simply by simply omitting some of the longitudinal ribs in the area of the flue gas duct.
- the width and cross-sectional shape of the closure flap is adapted to the cross section of the flue gas duct, and the flap is located on the exhaust side behind the flue gas duct on the bimetal controller arranged there and, because it is arranged in a relatively low-temperature range, can be formed from a correspondingly thin sheet metal segment with a relatively low weight be that can be easily moved by a known bimetal controller.
- the heating surface is lost due to the rib-free flue gas duct, but on the other hand, no additional heating surface has to be provided elsewhere, because when the flap is closed, the combustion gases flow out through the other, normally dimensioned heating gas flues, with a higher flow resistance and higher speed, thereby but the heat transfer on these heating surfaces is increased.
- the flue gas duct which is free of longitudinal ribs, is arranged under the mouth of the flue gas connection and the lever-like bimetal regulator with its free one End fixed in the exhaust pipe and the junction of the flue gas pipe is rectangular in cross section and is arranged with its large axis transverse to the longitudinal axis of the boiler.
- the position of the flap in the boiler according to the invention regulates itself.
- the special outflow conditions in a lint burner boiler which does not have any preferred hot gas flues lying on top is taken into account by the arrangement of the rib-free zone directly under the fume cupboard, so that the heating gases can reach the fume cupboard in a direct and short way with the flap open .
- the lower boundary edge of the junction is advantageously designed in the manner of an embrasure.
- the lint burner boiler consists of a water-bearing housing 1 with a combustion chamber 2, which is surrounded by a ring-shaped heating gas duct 5 leading to the flue gas outlet, divided by a plurality of longitudinal ribs 3 into individual ducts 4, with an adjustable, depending on the flue gas temperature Closure flap 6 is arranged.
- a ring-shaped heating gas duct 5 leading to the flue gas outlet divided by a plurality of longitudinal ribs 3 into individual ducts 4, with an adjustable, depending on the flue gas temperature Closure flap 6 is arranged.
- Such boilers are known in principle. "In principle” because such exhaust gas temperature controls, as far as is known, are only used on boilers with a horizontally oriented longitudinal axis.
- a flue gas duct 7 free of longitudinal ribs is arranged or provided in front of the flap 6 in the heating gas flue 5 with a width which corresponds at least to the width of three individual flues 4, that the width and cross-sectional shape of the flap corresponds to the cross section of the flue gas duct 7 and that finally the flap 6 is arranged on a bimetallic regulator 8 arranged behind the flue gas duct 7.
- the gas discharge pipe 9 is located on the side next to a collection chamber 11 which surrounds the burner connection area 10 in a ring 9 attached.
- the mouth 12 of the flue gas connector 9 is rectangular in cross section and its large axis 14 is arranged transversely to the longitudinal axis 15 of the boiler.
- the wall of the flue gas connector 9 is designed in such a way, as can also be readily seen from FIG. 2, that there is a circular cross section of the flue gas connector 9 on the chimney side.
- the lower boundary edge in the mouth 12 is advantageously formed in the form of embrasures 17, as can also be seen in FIG. 2.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Incineration Of Waste (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Lighters Containing Fuel (AREA)
Abstract
Description
Die Erfindung betrifft einen Sturzbrennerheizkessel mit leistungsregelbarem Brenner und, Abgastemperaturregelung gemäß Oberbetriff des Hauptanspruches.The invention relates to a lint burner boiler with power-adjustable burner and, exhaust gas temperature control according to the preamble of the main claim.
Derartige Heizkessel sind bspw.nach der DE-A-35 36 627 bekannt, bei dem es sich allerdings nicht um einen Sturzbrennerheizkessel handelt und für den auch kein leistungsregelbarer Brenner vorgesehen ist. Um Heizenergie zu sparen, aber auch um die Brennerlaufzeiten zu verkürzen, werden Öl- oder Gasgebläsebrenner verstärkt eingesetzt, die mit abgestufter oder sog. modulierender Leistung betrieben werden können, um die Leistung der Brenner in Zeiten geringeren Wärmebedarfs entsprechend anpassen zu können. Dabei ergibt sich aber das Problem, daß die Abgastemperatur der Kessel sinkt und der Schornstein nicht ausreichend mit Wärme beaufschlagt wird, was zu einer Kondensation der Verbrennungsgase im Schornstein führen kann, die es aber zu verhindern gilt, da sonst der Schornstein durchfeuchtet. In diesem Zusammenhang sind schon die verschiedensten Lösungen vorgeschlagen worden, bspw. auch in Form von temperaturabhängig regelbaren Klappen, die mit Gestängen, Stellmotoren, aber auch Bimetall-Elementen verstellbar sind (siehe DE-U-87 03 930). Derartige Klappenregelungen arbeiten mehr oder weniger zufriedenstellend. "Mehr oder weniger" deshalb, weil man kesselseitig keine entsprechenden Maßnahmen getroffen hat, d.h. auf die wirksame Wärmeübertragungsfläche, die zwangsläufig Auswirkung auf die Höhe der Abgastemperatur hat, hat man keinen Einfluß genommen.Such boilers are known, for example, from DE-A-35 36 627, which, however, is not a fall burner boiler and for which there is also no power-controlled burner. In order to save heating energy, but also to shorten the burner runtimes, oil or gas fan burners are increasingly being used, which can be operated with graded or so-called modulating output in order to be able to adjust the burner output accordingly in times of lower heat requirements. The problem arises, however, that the flue gas temperature of the boiler drops and the chimney is not subjected to sufficient heat, which can lead to condensation of the combustion gases in the chimney, which must be prevented, however, since otherwise the chimney will become damp. A wide variety of solutions have already been proposed in this connection, for example also in the form of flaps which can be regulated as a function of temperature and which can be adjusted using rods, servomotors and also bimetallic elements (see DE-U-87 03 930). Such flap controls work more or less satisfactorily. "More or less" because no appropriate measures have been taken on the boiler side, i.e. the effective heat transfer surface, which inevitably has an effect on the level of the exhaust gas temperature, has not been influenced.
Der Erfindung liegt demgemäß die Aufgabe zugrunde, einen Kessel der eingangs gennanten Art bei Verwendung als Sturzbrennerheizkessel dahingehend zu verbessern, daß mit einfachen Mitteln und Maßnahmen eine optimalere Abgastemperaturregelung selbsttätig bewirkt werden kann, verbunden mit der Maßgabe, bei gewünscht hoher Abgastemperatur für einen möglichst direkten Weg der Abgase zum Rauchgasabzugsstutzen des Heizkessels zu sorgen.The invention is therefore based on the object to improve a boiler of the type mentioned when used as a fall burner boiler in such a way that a more optimal exhaust gas temperature control can be effected automatically with simple means and measures, associated with the proviso that the desired high exhaust gas temperature for a direct route the flue gases to the flue gas outlet connection of the boiler.
Diese Aufgabe ist mit einem Heizkessel der eingangs genannten Art nach der Erfindung durch die im Kennzeichen des Hauptanspruches angeführten Merkmale gelöst.This object is achieved with a boiler of the type mentioned according to the invention by the features stated in the characterizing part of the main claim.
Durch diese erfindungsgemäße Ausbildung ist dafür gesorgt, daß in Zeiten geringeren Wärmebedarfs, also niedrig eingestellter Brennerleistung, die Heiz- bzw. Rauchgase in hohem Maße durch den bei geöffneter Verschlußklappe freigestellten Rauchgaskanal abströmen können, wobei aber dafür gesorgt ist, daß in diesem Rauchgaskanal sowohl der Widerstand als auch die Wärmeübertragungsfläche ganz wesentlich reduziert sind, so daß die durchströmenden Heizgase dort nur noch wenig Wärme abgeben können und mit relativ hohem Temperaturniveau in den Abzug gelangen. Von der Kesselkonstruktion her ist dies einfach dadurch zu erreichen, daß man im Bereich des Rauchgaskanales dort einfach einige der Längsrippen wegläßt. Die Breite und Querschnittsform der Verschlußklappe ist dem Querschnitt des Rauchgaskanales angepaßt, und die Klappe sitzt dabei abzugsseitig hinter dem Rauchgaskanal am dort angeordneten Bimetall-Regler und kann deshalb, da in einem relativ temperaturniedrigen Bereich angeordnet, aus einem entsprechend dünnen Blechsegment mit relativ geringem Gewicht ausgebildet sein, das problemlos von einem an sich bekannten Bimetall-Regler bewegt werden kann. Durch diese Ausbildung geht zwar durch den rippenfrei ausgebildeten Rauchgaskanal Heizfläche verloren, andererseits muß aber keine zusätzliche Heizfläche an anderer Stelle vorgesehen werden, weil bei geschlossener Klappe die Verbrennungsgase durch die anderen, normal bemessenen Heizgaszüge abströmen, und zwar mit höherem Strömungswiderstand und höherer Geschwindigkeit, wodurch aber der Wärmeübergang an diesen Heizflächen erhöht wird.
Für einen Sturzbrennerkessel der hier vorliegenden Art, bei dem also der Abgasstutzen seitlich neben einer ringförmig den Brenneranschlußbereich umgebenden Sammelkammer angesetzt ist, ist dabei wesentlich, daß der von Längsrippen freigestellte Rauchgaskanal unter der Einmündung des Abgasstutzens angeordnet und der hebelartig ausgebildete Bimetall-Regler mit seinem freien Ende im Abgasstutzen befestigt und die Einmündung des Abgasstutzens im Querschnitt rechteckig ausgebildet und mit ihrer großen Achse quer zur Längsachse des Kessels angeordnet ist. Dadurch ist der relativ breite Abströmquerschnitt des Rauchgaskanales besser erfaßbar.
Im Gegensatz zum Horizontalheizkessel nach der DE-A- 35 36 627, bei dem die stationäre Blende entweder nur zur Vergleichmäßigung der Heizgaszugbeaufschlagung vorgesehen ist oder bei als separat verstellbarer Blende zur Erhöhung der Abgastemperatur, regelt sich die Stellung der Klappe beim erfindungsgemäßen Heizkessel von selbst. Den besonderen Abströmverhältnissen bei einem Sturzbrenner-Heizkessel, der keine bevorzugt angeströmten, oben liegende Heizgaszüge aufweist, ist durch die Anordnung der rippenfreien Zone unmittelbar unter dem Abzugstutzen Rechnung getragen, so daß die Heizgase auf direktem und kurzem Weg bei geöffneter Klappe in den Abzugsstutzen gelangen können. Zur Verbesserung der Verteilung der Abgase über dem Abzugsquerschnitt im Bereich des Abgasstutzens ist vorteilhaft der untere Begrenzungsrand der Einmündung schießschartenartig ausgebildet.This inventive design ensures that in times of lower heat requirements, i.e. low burner output, the heating or flue gases can flow out to a large extent through the flue gas duct exposed when the flap is open, but care is taken to ensure that both the flue gas duct and the flue gas duct Resistance as well as the heat transfer area are significantly reduced, so that the heating gases flowing through there can only emit little heat and get into the fume cupboard at a relatively high temperature level. From the boiler design, this can be achieved simply by simply omitting some of the longitudinal ribs in the area of the flue gas duct. The width and cross-sectional shape of the closure flap is adapted to the cross section of the flue gas duct, and the flap is located on the exhaust side behind the flue gas duct on the bimetal controller arranged there and, because it is arranged in a relatively low-temperature range, can be formed from a correspondingly thin sheet metal segment with a relatively low weight be that can be easily moved by a known bimetal controller. Through this design, the heating surface is lost due to the rib-free flue gas duct, but on the other hand, no additional heating surface has to be provided elsewhere, because when the flap is closed, the combustion gases flow out through the other, normally dimensioned heating gas flues, with a higher flow resistance and higher speed, thereby but the heat transfer on these heating surfaces is increased.
For a lintel burner boiler of the type in question, in which the flue gas connection is positioned laterally next to a collection chamber which surrounds the burner connection area in an annular manner, it is essential that the flue gas duct, which is free of longitudinal ribs, is arranged under the mouth of the flue gas connection and the lever-like bimetal regulator with its free one End fixed in the exhaust pipe and the junction of the flue gas pipe is rectangular in cross section and is arranged with its large axis transverse to the longitudinal axis of the boiler. As a result, the relatively wide outflow cross section of the flue gas duct can be better detected.
In contrast to the horizontal boiler according to DE-A-35 36 627, in which the stationary panel is only provided to even out the heating gas draft or as a separately adjustable panel to increase the exhaust gas temperature, the position of the flap in the boiler according to the invention regulates itself. The special outflow conditions in a lint burner boiler which does not have any preferred hot gas flues lying on top is taken into account by the arrangement of the rib-free zone directly under the fume cupboard, so that the heating gases can reach the fume cupboard in a direct and short way with the flap open . In order to improve the distribution of the exhaust gases over the exhaust cross-section in the area of the exhaust pipe, the lower boundary edge of the junction is advantageously designed in the manner of an embrasure.
Der erfindungsgemäße Sturzbrennerheizkessel wird nachfolgend anhand der zeichnerischen Darstellung eines Ausführungsbeispieles näher erläutert.The lint burner boiler according to the invention is explained in more detail below on the basis of the drawing of an exemplary embodiment.
Es zeigt
- Fig. 1
- einen Längsschnitt durch einen Sturzbrennerheizkessel;
- Fig. 2
- schematisch eine Ansicht des Sturbrennerheizkessels von der Abzugsseite her gesehen und
- Fig. 3
- einen Querschnitt durch den Sturzbrennerheizkessel gemäß Fig. 1, 2 etwa im Bereich der Verschlußklappenanordnung.
- Fig. 1
- a longitudinal section through a lint burner boiler;
- Fig. 2
- schematically seen a view of the Sturbrennerheizkessel from the fume cupboard and
- Fig. 3
- a cross section through the lint burner boiler according to FIG. 1, 2 approximately in the region of the flap arrangement.
Der Sturzbrennerheizkessel besteht aus einem wasserführenden Gehäuse 1 mit einer Brennkammer 2, die von einem ringförmigen, zum Rauchgasabzug führenden, durch eine Vielzahl von Längsrippen 3 in Einzelzüge 4 gegliederten Heizgaszug 5 umgeben ist, wobei im abzugsseitigen Bereich eine abgasgemperaturabhängig verstellbare Verschlußklappe 6 angeordnet ist. Insoweit sind derartige Kessel im Prinzip bekannt. "Im Prinzip" deshalb, weil derartige Abgastemperaturregelungen, soweit bekannt, ausschließlich an Heizkesseln mit horizontal orientierter Längsachse verwendet werden. Wesentlich ist nun, daß vor der Verschlußklappe 6 im Heizgaszug 5 ein längsrippenfreier Rauchgaskanal 7 mit einer Breite angeordnet bzw. vorgesehen ist,die mindestens der Breite dreier Einzelzüge 4 entspricht, daß ferner die Breite und die Querschnittsform der Verschlußklappe dem Querschnitt des Rauchgaskanales 7 entspricht und daß schließlich die Klappe 6 an einem abzugsseitig hinter dem Rauchgaskanal 7 angeordneten Bimetall-Regler 8 angeordnet ist.The lint burner boiler consists of a water-bearing
Beim dargestellten Ausführungsbeispiel des Sturzbrennerkessels befindet sich der Gasabzugsstutzen 9 seitlich neben einer ringförmig den Brenneranschlußbereich 10 umgebenden Sammelkammer 11. Hierbei ist der Rauchgaskanal 7 unter der Einmündung 12 des Abgasstutzens 9 angeordnet, und der hebelartig ausgebildete Bimetall-Regler 8 mit seinem klappenfreien Ende 13 im Abgasstutzen 9 befestigt. Wie insbesondere aus Fig. 2 ersichtlich, ist dabei die Einmündung 12 des Abgasstutzens 9 im Querschnitt rechteckig ausgebildet und mit ihrer großen Achse 14 quer zur Längsachse 15 des Kessels angeordnet. Die Wand des Abgasstutzens 9 ist dabei so gestaltet, wie ebenfalls ohne weiteres aus Fig. 2 erkennbar, daß sich schornsteinseitig ein kreisförmiger Querschnitt des Abgasstutzens 9 ergibt. Um eine gute Abgasverteilung der bei geöffneter Verschlußklappe 6 bevorzugt durch den Rauchgaskanal 7 abströmenden Verbrennungsgase über den gesamten Abzugsquerschnitt zu erreichen, ist, wie ebenfalls aus Fig. 2 ersichtlich, der untere Begrenzungsrand in der Einmündung 12 vorteilhaft in Form von Schießscharten 17 ausgebildet.In the illustrated embodiment of the lint burner boiler, the
Claims (2)
- An overhead burner-type heating boiler including an output-controlled burner and an exhaust gas temperature control, comprising a water-carrying housing (1) including a combustion chamber (2) surrounded by an annular heating gas tubing (5) leading to the flue gas discharge pipe and being subdivided by a plurality of longitudinal fins (3) into individual tubings (4), with a closure flap (6) adjustable in response to the exhaust gas temperature and covering one or more individual tubings (4) being provided in the discharge side area, and with a flue gas channel (7) clear of longitudinal fins being provided in the heating gas tubing (5) at a width corresponding at least to the width of three indivudal tubings (4), characterized in that the flap (6) is provided with a bimetal control (8), that the bimetal control (8) of lever-type configuration with the flap-free end (13) thereof is fixed within the exhaust gas nozzle (9), that the flue gas channel (7) is located underneath the termination (12) of the exhaust gas nozzle (9), and that the termination (12) thereof is of rectangular cross-section and, with the large axis (14) thereof, is disposed transverse of the longitudinal axis (15) of the boiler.
- A heating boiler according to claim 1, characterized in that the lower limiting rim (16) of the termination (12) is of loop hole-type configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT90102287T ATE93307T1 (en) | 1989-02-25 | 1990-02-06 | DOWNLOADER BOILER. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8902265U DE8902265U1 (en) | 1989-02-25 | 1989-02-25 | |
| DE8902265U | 1989-02-25 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0385137A2 EP0385137A2 (en) | 1990-09-05 |
| EP0385137A3 EP0385137A3 (en) | 1991-03-06 |
| EP0385137B1 true EP0385137B1 (en) | 1993-08-18 |
Family
ID=6836430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90102287A Expired - Lifetime EP0385137B1 (en) | 1989-02-25 | 1990-02-06 | Boiler equipped with a downstream burner |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0385137B1 (en) |
| AT (1) | ATE93307T1 (en) |
| DE (2) | DE8902265U1 (en) |
| ES (1) | ES2044255T3 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2348946A (en) * | 1999-04-15 | 2000-10-18 | Potterton Myson Limited | Boiler with temperature controlled bypass in heat exchanger to prevent condensate formation |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3304455A1 (en) * | 1983-02-09 | 1984-08-09 | Abig Werke Carry Gross GmbH & Co KG, 7770 Überlingen | Heating boiler |
| DE8402667U1 (en) * | 1984-01-31 | 1984-05-17 | Vießmann, Hans, Dr.h.c., 3559 Battenberg | HEATING BOILER |
| DE3442467C2 (en) * | 1984-11-22 | 1995-11-16 | Koerting Ag | Low temperature boiler |
| DE3536627A1 (en) * | 1985-10-15 | 1987-04-16 | Sieger Heizkesselwerk Gmbh | Central heating furnace |
| DE8536716U1 (en) * | 1985-12-31 | 1987-04-30 | Weishaupt, Siegfried, Dipl.-Ing., 7959 Schwendi, De | |
| DE8630186U1 (en) * | 1986-11-11 | 1987-01-02 | Viessmann, Hans, Dr., 3559 Battenberg, De | |
| DE8703930U1 (en) * | 1987-03-16 | 1987-04-30 | Viessmann Werke Gmbh & Co, 3559 Allendorf, De |
-
1989
- 1989-02-25 DE DE8902265U patent/DE8902265U1/de not_active Expired - Lifetime
-
1990
- 1990-02-06 DE DE9090102287T patent/DE59002353D1/en not_active Expired - Fee Related
- 1990-02-06 EP EP90102287A patent/EP0385137B1/en not_active Expired - Lifetime
- 1990-02-06 ES ES90102287T patent/ES2044255T3/en not_active Expired - Fee Related
- 1990-02-06 AT AT90102287T patent/ATE93307T1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| ES2044255T3 (en) | 1994-01-01 |
| EP0385137A3 (en) | 1991-03-06 |
| ATE93307T1 (en) | 1993-09-15 |
| DE8902265U1 (en) | 1990-07-26 |
| DE59002353D1 (en) | 1993-09-23 |
| EP0385137A2 (en) | 1990-09-05 |
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