EP0345683B1 - Heating boiler for combustion of fluid or gaseous fuels - Google Patents

Heating boiler for combustion of fluid or gaseous fuels Download PDF

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Publication number
EP0345683B1
EP0345683B1 EP89110107A EP89110107A EP0345683B1 EP 0345683 B1 EP0345683 B1 EP 0345683B1 EP 89110107 A EP89110107 A EP 89110107A EP 89110107 A EP89110107 A EP 89110107A EP 0345683 B1 EP0345683 B1 EP 0345683B1
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EP
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Prior art keywords
combustion chamber
wall
heating boiler
firing
chamber
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EP89110107A
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German (de)
French (fr)
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EP0345683A3 (en
EP0345683A2 (en
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Hans Dr. Viessmann
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    • 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
    • F24H1/24—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers
    • F24H1/26—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body
    • F24H1/263—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body with a dry-wall combustion chamber

Definitions

  • the invention relates to a boiler for the combustion of liquid or gaseous fuels according to the preamble of the main claim.
  • the longitudinal ribs which divide the ring-cylindrical heating gas flue into individual flues, can be provided in a variety of ways in the design of the combustion chamber. So it is known for the formation of the combustion chamber to produce this as an internally ribbed one-part or multi-part cast body. Furthermore, it is known to form the combustion chamber by means of extruded profiles, the longitudinal ribs of which are also formed during their manufacture.
  • Two other variants consist in the fact that appropriately adapted, internally ribbed cast rings are used in the cylindrical combustion chamber in a heat-conducting manner, or that a correspondingly large sheet metal blank is provided with a large number of folded longitudinal ribs, this blank is rounded cylindrical and inserted overall into the cylindrical combustion chamber and for a heat-conducting one Connection of the two layers ensures. Apart from this, you can of course also arrange angular profiles parallel to the axis and closely lined up on the inner wall of the combustion chamber.
  • the invention is therefore based on the object to improve heating boilers of the generic type and to find a compromise between "hot” and “cold” combustion chamber wall, ie to ensure from the boiler construction that there are no impermissibly high NOX values in the exhaust gas can adjust and with the proviso that the previous boiler design principle can be essentially maintained and also the combustion chamber in terms to optimally train their insertability and condensate-proof design.
  • the end edges of the longitudinal ribs are at least pre-machined so that all opposing rib end edges are at the same distance from one another, the combustion chamber divided into individual rings then being pushed in under compressed air to produce the thermal contact.
  • the division of the combustion chamber into at least two rings according to the invention is of particular importance, since it is easier to achieve the thermal contact in all areas than with a one-piece combustion chamber, individual rings are easier to insert by pressing in, no high demands have to be made on the processing of the longitudinal ribs and there is also the advantage for those at risk of condensation Area of the combustion chamber pulled condensate-proof material for the ring can only be used in this area.
  • heating boilers of the generic type are double-layered for reasons of condensate safety with regard to the partition between the combustion chamber and the water-carrying interior of the boiler housing, the inner layer consisting of a correspondingly folded sheet metal blank, which, as it were, is rounded and forms an internal insert.
  • folding the ribs it is inevitable because the folds at the foot of the ribs cannot be made sharp-edged, that between the inner layer and the actual combustion chamber wall, gusset gaps arise, in the area of which the heat transfer is substantially reduced.
  • the boiler consists of a water-carrying housing 13 with a cylindrical combustion chamber 6, in which a pot-like combustion chamber 2 in the space between the end edges of the ring-cylindrical heating gas flue, which extends along the water-cooled combustion chamber wall 11 and is thermally conductively connected to this wall 14 in individual channels 14 'sliding longitudinal ribs 4 is arranged.
  • the wall 1 of the combustion chamber 2 is selectively connected in a heat-conducting manner to the end edges 3 of the longitudinal ribs 4, as can be seen from FIGS. 2, 3.
  • the end edges 3 of the longitudinal ribs 4 are machined, for which the longitudinal ribs at their end edges 3 are overturned, for example, in order to ensure that all opposing ones Rib end edges 3 have the same distance D from one another, which ensures that the combustion chamber wall to be used can be brought into heat-conducting contact with these at all end edges 3.
  • the combustion chamber is formed for the reasons mentioned in FIG. 6 from a plurality of rings 17 of the same width B, which correspond to the length L of the combustion chamber when strung together.
  • the rings 17 are provided on one side with a circumferential bend 18 pointing into the interior of the combustion chamber, which overlaps the crank-free edge 19 of the respective connecting ring.
  • the burner-side ring can, as shown, be combined in one part in a boiler construction according to FIG. 6 (vertical boiler with lintel burner chamber) with the wall 21 surrounding the burner area.
  • the strong division of the combustion chamber wall into, as shown, four rings 17 is not absolutely necessary, but in the exemplary embodiment is based on the fact that the inner shell 16 is also divided into four rings 15.
  • This division of the combustion chamber into several rings is particularly advantageous in view of the avoidability of high manufacturing accuracy of the rib support edges for the combustion chamber wall, because the combustion chamber sections can be introduced better and are also better brought to the ribs for heat-conducting contact.
  • the entire combustion chamber does not have to be formed from high-quality steel sheet if necessary, but can be limited to producing only the most condensate-prone ring 17 'from expensive stainless steel.
  • FIGS. 3-5 relate to a particular embodiment of such heating boilers in which the longitudinal ribs 4 are obtained by unfolding a corresponding sheet metal blank, the overall and corresponding Cylindrical rounded and made endless as an inner shell in the combustion chamber 6 is used to conduct heat to the combustion chamber wall 11.
  • 3-5 approximately correspond to the normal size of such rib designs, it is clear from this that not inconsiderable folding gussets arise between this inner shell 7 and the combustion chamber wall 11, which gussets 8 represent corresponding heat transfer barriers.
  • each rib fold 5 in the combustion chamber wall-side fold gusset 5 is one of them Gusset cross section arranged in cross section corresponding filling profile 9.
  • Relatively soft metallic material can be expediently and advantageously used in order to achieve the best possible filling of the gusset volume when the components are pressed together.

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  • 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)
  • Combustion Of Fluid Fuel (AREA)

Description

Die Erfindung betrifft einen Heizkessel für die Verbrennung flüssiger oder gasförmiger Brennstoffe gemäß Oberbegriff des Hauptanspruches.The invention relates to a boiler for the combustion of liquid or gaseous fuels according to the preamble of the main claim.

Derartige Heizungskessel sind hinlänglich bekannt und bedürfen insoweit keines besonderen druckschriftlichen Nachweises. Die Längsrippen, die dabei den ringzylindrischen Heizgaszug in Einzelzüge gliedern, können dabei auf die unterschiedlichste Weise konstruktiv im Feuerraum vorgesehen werden. So ist es bekannt, für die Ausbildung des Feuerraumes diesen als innenberippten ein- oder mehrteiligen Gußkörper herzustellen. Ferner ist es bekannt, den Feuerraum durch Strangpreßprofile zu bilden, bei deren Herstellung die Längsrippen mit angeformt werden. Zwei weitere Varianten bestehen darin, daß man in den zylindrischen Feuerraum entsprechend angepaßte, ebenfalls innenberippte Gußringe wärmeleitend einsetzt oder daß man einen entsprechend großen Blechzuschnitt mit einer Vielzahl von gefalteten Längsrippen versieht, diesen Zuschnitt zylindrisch rundet und insgesamt in den zylindrischen Feuerraum einschiebt und für eine wärmeleitende Verbindung der beiden Lagen sorgt. Abgesehen davon kann man selbstverständlich auch Winkelprofile achsparallel und dicht aneinandergereiht auf der inneren Feuerraumwand anordnen. In derartige, mit Längsrippen bestückte Feuerräume wurde bisher leicht einsetzbar und wieder herausnehmbar eine topfartig ausgebildete Umkehrbrennkammer eingesetzt, die aufgrund ihres Untermaßes in Bezug auf den verfügbaren Freiraum zwischen den Rippen, von wenigen Rippen im unteren Bereich abgesehen, praktisch keinen wärmeleitenden Kontakt zu den Längsrippen hatte, was bedeutete, daß eine Wärmeabfuhr aus der Brennkammerwand in die Längsrippen nicht stattfand, was im übrigen aber auch nicht gewünscht war, da man derartige Kessel mit möglichst heißer Brennkammer betreiben wollte, um schon in diesem Bereich für einen optimalen Ausbrand der Brennstoffe zu sorgen. Soweit sich wärmeleitende Verbindungen zwischen Brennkammer und Längsrippen ergaben, erfolgte dies erst, wenn sich die Brennkammer ausreichend erwärmt und gedehnt hatte.Such boilers are well known and do not require any special printed evidence. The longitudinal ribs, which divide the ring-cylindrical heating gas flue into individual flues, can be provided in a variety of ways in the design of the combustion chamber. So it is known for the formation of the combustion chamber to produce this as an internally ribbed one-part or multi-part cast body. Furthermore, it is known to form the combustion chamber by means of extruded profiles, the longitudinal ribs of which are also formed during their manufacture. Two other variants consist in the fact that appropriately adapted, internally ribbed cast rings are used in the cylindrical combustion chamber in a heat-conducting manner, or that a correspondingly large sheet metal blank is provided with a large number of folded longitudinal ribs, this blank is rounded cylindrical and inserted overall into the cylindrical combustion chamber and for a heat-conducting one Connection of the two layers ensures. Apart from this, you can of course also arrange angular profiles parallel to the axis and closely lined up on the inner wall of the combustion chamber. In such fireboxes equipped with longitudinal ribs, a pot-shaped reversing combustion chamber has so far been used easily and can be removed again.As a result of its undersize in terms of the available space between the ribs, apart from a few ribs in the lower region, there was practically no heat-conducting contact with the longitudinal ribs , which meant heat dissipation the combustion chamber wall in the longitudinal ribs did not take place, which, however, was also not desirable since one wanted to operate such boilers with the combustion chamber as hot as possible in order to ensure an optimal burnout of the fuels in this area. Insofar as there were heat-conducting connections between the combustion chamber and the longitudinal ribs, this did not take place until the combustion chamber had warmed up and expanded sufficiently.

Wie sich herausgestellt hat, haben aber derartig "heiße" Brennkammern, die in der Regel aus relativ dünnem Edelstahl gebildet sind, den Nachteil, daß die aus dem Kessel abströmenden Gase relativ hohe NOX-Werte aufweisen, deren Reduzierung in Rücksicht auf die damit verbundene Umweltbelastung mittlerweile absolut wünschenswert geworden ist. Da derartige Kessel bis jetzt scheinbar keine konstruktiven Möglichkeiten boten, von der Kesselseite her für eine NOX-Reduzierung sorgen zu können, haben sich diese Maßnahmen zur NOX-Reduzierung im wesentlichen auf die Brennergestaltung reduziert. Trotz dieser Maßnahmen im Brennerbereich bleiben aber die NOX-Werte in den Abgasen noch in unerwünscht hoher Größenordnung, die durch die Kesselkonstruktion selbst bedingt ist, d.h., insbesondere die Ursachen dafür in der bisherigen Anordnung und Ausbildung der Brennkammer liegen. Heizungskessel, die mit sogenannter "kalter" Brennkammer Betrieben werden ― das sind solche, deren Brennkammerwand als wasserführende Doppelwand ausgebildet ist ― stellen das andere Extrem dar und sind außerdem mit einem relativ hohen Fertigungsaufwand verbunden.As has been found, however, such "hot" combustion chambers, which are generally made of relatively thin stainless steel, have the disadvantage that the gases flowing out of the boiler have relatively high NOX values, the reduction of which in consideration of the associated environmental pollution has become absolutely desirable. Since such boilers have apparently so far not offered any constructive options for being able to provide NOX reduction from the boiler side, these measures for NOX reduction have essentially been reduced to the burner design. Despite these measures in the burner area, the NOX values in the flue gases still remain at an undesirably high level, which is due to the boiler design itself, i.e. the causes for this are the previous arrangement and design of the combustion chamber. Heating boilers that are operated with so-called "cold" combustion chambers - those are those whose combustion chamber wall is designed as a water-carrying double wall - represent the other extreme and are also associated with a relatively high production outlay.

Der Erfindung liegt demgemäß die Aufgabe zugrunde, Heizungskessel der gattungsgemäßen Art dahingehend zu verbessern und einen Kompromiß zwischen "heißer" und "kalter" Brennkammerwand zu finden, d.h., von der Kesselkonstruktion her dafür zu sorgen, daß sich keine unzuläßig hohen NOX-Werte im Abgas einstellen können und zwar mit der Maßgabe, das bisherige Kesselkonstruktionsprinzip im wesentlichen beibehalten zu können und ferner die Brennkammer dabei hinsichtlich ihrer Einbringbarkeit und kondensatfesten Gestaltung optimal auszubilden.The invention is therefore based on the object to improve heating boilers of the generic type and to find a compromise between "hot" and "cold" combustion chamber wall, ie to ensure from the boiler construction that there are no impermissibly high NOX values in the exhaust gas can adjust and with the proviso that the previous boiler design principle can be essentially maintained and also the combustion chamber in terms to optimally train their insertability and condensate-proof design.

Diese Aufgabe ist mit einem Heizungskessel der eingangs genannten Art nach der Erfindung durch die im Kennzeichen des Hauptanspruches angeführten Merkmale gelöst. Vorteilhafte Weiterbildungen ergeben sich nach den Unteransprüchen.This object is achieved with a heating boiler of the type mentioned according to the invention by the features stated in the characterizing part of the main claim. Advantageous further developments result from the subclaims.

Dieses denkbar einfache und den Fertigungsaufwand nicht wesentlich vergrößernde Ausbildungsprinzip führt, wie sich gezeigt hat zu überraschend guten Ergebnissen bzgl. der NOX-Werte, und zwar deshalb, weil durch die gezielt angesetzten Wärmeleitungsübergänge aus der Brennkammerwand zu allen Längsrippen für einen unmittelbaren Wärmeabfluß aus der Brennkammerwand in die Längsrippen gesorgt ist. Da die Wärme ständig aus der Brennkammerwand abfließen kann, nimmt diese aufgrund dieses ständigen Wärmeabflußes nicht mehr die bisher hohen Temperaturwerte an, so daß diese gewissermaßen als "warme" Brennkammer zu bezeichnen und einzustufen ist. Im Vergleich zu einer aufwendig herzustellenden und wassergekühlten Brennkammer ist die Zuordnung der Brennkammer zu den Längsrippen wesentlich weniger aufwendig und im Gegensatz zu solchen "kalten" Brennkammern fällt bei der erfindungsgemäßen Brennkammer auch kein Kondensat in diesem Bereich an.This conceivably simple design principle, which does not significantly increase the manufacturing outlay, has, as has been shown, lead to surprisingly good results with regard to the NOX values, namely because the targeted heat conduction transitions from the combustion chamber wall to all longitudinal ribs for direct heat flow from the combustion chamber wall is taken care of in the longitudinal ribs. Since the heat can continuously flow out of the combustion chamber wall, due to this constant heat dissipation, it no longer assumes the previously high temperature values, so that it can be described and classified as a "warm" combustion chamber. Compared to a water-cooled combustion chamber, which is complex to manufacture, the assignment of the combustion chamber to the longitudinal ribs is considerably less complex and, in contrast to such "cold" combustion chambers, no condensate occurs in this area in the combustion chamber according to the invention.

Die Endränder der Längsrippen sind dabei zumindest vorbearbeitet, so daß alle sich gegenüberstehenden Rippenendränder zueinander die gleiche Distanz aufweisen, wobei dann die in Einzelringe gegliederte Brennkammer unter Herstellung des Wärmeleitkontaktes unter Preßluft eingeschoben wird. Die erfindungsgemäße Gliederung der Brennkammer in mindestens zwei Ringe ist dabei von besonderer Bedeutung, da damit der Wärmeleitkontakt in allen Bereichen besser erzielbar ist als mit einer einstückigen Brennkammer, Einzelringe durch einpressen leichter einzubringen sind, an die Bearbeitung der Längsrippen keine hohen Anforderungen gestellt werden müssen und außerdem der Vorteil besteht, für den kondensatgefährdeten Bereich der Brennkammer geziehlt kondensatfestes Material für den Ring nur in diesem Bereich verwenden zu können.The end edges of the longitudinal ribs are at least pre-machined so that all opposing rib end edges are at the same distance from one another, the combustion chamber divided into individual rings then being pushed in under compressed air to produce the thermal contact. The division of the combustion chamber into at least two rings according to the invention is of particular importance, since it is easier to achieve the thermal contact in all areas than with a one-piece combustion chamber, individual rings are easier to insert by pressing in, no high demands have to be made on the processing of the longitudinal ribs and there is also the advantage for those at risk of condensation Area of the combustion chamber pulled condensate-proof material for the ring can only be used in this area.

Wie vorerwähnt, sind Heizungskessel der gattungsgemäßen Art aus Gründen der Kondensatsicherheit bezüglich der Trennwand zwischen Feuerraum und wasserführenden Innenraum des Kesselgehäuses doppellagig ausgebildet, wobei die innere Lage aus einem entsprechend gefalteten Blechzuschnitt besteht, der entsprechend zylindrisch gerundet gewissermaßen einen inneren Einsatz bildet. Bei der Rippenfaltung ist es dabei unvermeidlich, da man die Faltungen am Fuße der Rippen nicht scharfkantig gestalten kann, daß zwischen der inneren Lage und der eigentlichen Feuerraumwand Hohlraumzwickel entstehen, in deren Bereich der Wärmeübergang wesentlich gedrosselt ist. Wie sich gezeigt hat, ist die Wärmeabfuhr aus der eingepreßten Brennkammerwand unmittelbar in die Endränder der Rippen derart stark, daß die verfügbaren Wärmeübergangsflächen zwischen den beiden Lagen aufgrund der unvermeidbaren Zwickelbereiche nicht ausreichen, die eingeleitete Wärme optimal zur Wasserseite hin passieren zu lassen. Da ein Interesse daran besteht, für einen optimalen Wärmeabfluß von der Brennkammer aus über die Längsrippe zur Feuerraumwand zu ermöglichen sind deshalb bezüglich solcher Kesselausführungsformen vorteilhafte Weiterbildungen gemäß der Ansprüche 4 bis 6 vorgesehen.As mentioned above, heating boilers of the generic type are double-layered for reasons of condensate safety with regard to the partition between the combustion chamber and the water-carrying interior of the boiler housing, the inner layer consisting of a correspondingly folded sheet metal blank, which, as it were, is rounded and forms an internal insert. When folding the ribs, it is inevitable because the folds at the foot of the ribs cannot be made sharp-edged, that between the inner layer and the actual combustion chamber wall, gusset gaps arise, in the area of which the heat transfer is substantially reduced. As has been shown, the heat dissipation from the pressed-in combustion chamber wall directly into the end edges of the ribs is so strong that the available heat transfer surfaces between the two layers are not sufficient due to the unavoidable gusset areas to allow the heat introduced to pass optimally towards the water side. Since there is an interest in enabling optimal heat flow from the combustion chamber via the longitudinal rib to the combustion chamber wall, advantageous developments are therefore provided according to claims 4 to 6 with respect to such boiler designs.

Der erfindungsgemäße Heizungskessel wird nachfolgend anhand der zeichnerischen Darstellung von Ausführungsbeispielen näher erläutert.The heating boiler according to the invention is explained in more detail below with reference to the drawing of exemplary embodiments.

Es zeigt schematisch:

Fig. 1
einen Längsschnitt durch einen Heizungskessel der gattungsgemäßen Art;
Fig. 2
einen Querschnitt durch eine Ausführungsform des Heizungskessels gemäß Fig. 1;
Fig. 3-5
Schnitte durch besondere Ausführungsformen gefalteter Längsrippen im Verbindungsbereich zur Innenfläche der Feuerraumbegrenzungswand und
Fig. 6
im Schnitt einen Heizungskessel mit vertikaler Ausführungsform.

It shows schematically:
Fig. 1
a longitudinal section through a boiler of the generic type;
Fig. 2
a cross section through an embodiment of the boiler according to FIG. 1;
Fig. 3-5
Cuts through special embodiments of folded longitudinal ribs in the connection area to the inner surface of the combustion chamber boundary wall and
Fig. 6
on average a boiler with a vertical design.

Wie aus Fig. 1 ersichtlich, besteht der Heizkessel aus einem wasserführenden Gehäuse 13 mit einem zylindrischen Feuerraum 6, in dem eine topfartige Brennkammer 2 im Freiraum zwischen den Endrändern von sich längs der wassergekühlten Feuerraumwand 11 erstreckenden, mit dieser Wand wärmeleitend verbundenen, den ringzylindrischen Heizgaszug 14 in Einzelkanäle 14′ gleidernden Längsrippen 4 angeordnet ist.As can be seen from Fig. 1, the boiler consists of a water-carrying housing 13 with a cylindrical combustion chamber 6, in which a pot-like combustion chamber 2 in the space between the end edges of the ring-cylindrical heating gas flue, which extends along the water-cooled combustion chamber wall 11 and is thermally conductively connected to this wall 14 in individual channels 14 'sliding longitudinal ribs 4 is arranged.

Unabhängig davon, welche konstruktive Gestaltung die Längsrippen 4 tatsächlich haben, ist die Wand 1 der Brennkammer 2 gezielt mit den Endrändern 3 der Längsrippen 4 wärmeleitend verbunden, wie dies aus Fig. 2, 3 ersichtlich ist. Dafür sind die Endränder 3 der Längsrippen 4 bearbeitet ausgebildet, wofür die Längsrippen an ihren Endrändern 3 bspw. überdreht werden, um zu gewährleisten, daß alle sich gegenüberstehenden Rippenendränder 3 zueinander die gleiche Distanz D haben, was gewährleistet, daß die einzusetzende Brennkammerwand an allen Endrändern 3 mit diesen in wärmeleitenden Kontakt gebracht werden kann.Regardless of which structural design the longitudinal ribs 4 actually have, the wall 1 of the combustion chamber 2 is selectively connected in a heat-conducting manner to the end edges 3 of the longitudinal ribs 4, as can be seen from FIGS. 2, 3. For this purpose, the end edges 3 of the longitudinal ribs 4 are machined, for which the longitudinal ribs at their end edges 3 are overturned, for example, in order to ensure that all opposing ones Rib end edges 3 have the same distance D from one another, which ensures that the combustion chamber wall to be used can be brought into heat-conducting contact with these at all end edges 3.

Unter Beibehaltung des Prinzips der wärmeleitenden Verbindung der Brennkammerwand 1 mit den Längsrippen, ist die Brennkammer aus den genannten Gründen gemäß Fig. 6 aus mehreren Ringen 17 gleicher Breite B gebildet, die aneinandergereiht der Länge L der Brennkammer entsprechen. Die Ringe 17 sind dabei auf einer Seite mit einer umlaufenden, in das Innere der Brennkammer weisenden Abkröpfung 18 versehen, die den kröpfungsfreien Rand 19 des jeweiligen Anschlußringes übergreift. Der brennerseitige Ring kann dabei, wie dargstellt, bei einer Kesselkonstruktion gemäß Fig. 6 (Vertikalkessel mit Sturzbrennerkammer) mit der den Brennerbereich umgebenden Wandung 21 zu einem Teil zusammengefaßt sein. Die starke Gliederung der Brennkammerwand in, wie dargestellt, vier Ringe 17 ist nicht zwingend notwendig, sondern beim Ausführungsbeispiel daran orientiert, daß die Innenschale 16 ebenfalls in vier Ringe 15 gegliedert ist. Insbesondere in Rücksicht auf die Vermeidbarkeit hoher Fertigungsgenauigkeiten der Rippenauflageränder für die Brennkammerwand ist diese Aufteilung der Brennkammer in mehrere Ringe von Vorteil, weil die Brennkammerteilstücke besser einzubringen und auch besser zur wärmeleitenden Anlage an die Rippen zu bringen sind. Außerdem muß nicht im Bedarfsfall die ganze Brennkammer aus hochwertigem Stahlblech gebildet werden, sondern man kann sich darauf beschränken, lediglich den am meisen kondensatgefährdeten Ring 17′ aus teurem Edelstahl zu fertigen.While maintaining the principle of the thermally conductive connection of the combustion chamber wall 1 with the longitudinal ribs, the combustion chamber is formed for the reasons mentioned in FIG. 6 from a plurality of rings 17 of the same width B, which correspond to the length L of the combustion chamber when strung together. The rings 17 are provided on one side with a circumferential bend 18 pointing into the interior of the combustion chamber, which overlaps the crank-free edge 19 of the respective connecting ring. The burner-side ring can, as shown, be combined in one part in a boiler construction according to FIG. 6 (vertical boiler with lintel burner chamber) with the wall 21 surrounding the burner area. The strong division of the combustion chamber wall into, as shown, four rings 17 is not absolutely necessary, but in the exemplary embodiment is based on the fact that the inner shell 16 is also divided into four rings 15. This division of the combustion chamber into several rings is particularly advantageous in view of the avoidability of high manufacturing accuracy of the rib support edges for the combustion chamber wall, because the combustion chamber sections can be introduced better and are also better brought to the ribs for heat-conducting contact. In addition, the entire combustion chamber does not have to be formed from high-quality steel sheet if necessary, but can be limited to producing only the most condensate-prone ring 17 'from expensive stainless steel.

Die in Bezug auf die Fig. 1, 2 vergrößerten Schnittdarstellungen der Fig. 3-5 beziehen sich insofern auf eine besondere Ausführungsform derartiger Heizungskessel, bei denen die Längsrippen 4 durch Auffaltung eines entsprechenden Blechzuschnittes gewonnen sind, der insgesamt und entsprechend zylindrisch gerundet und endlos gemacht als Innenschale in den Feuerraum 6 wärmeleitend zur Feuerraumwand 11 eingesetzt wird. Da die Darstellungen der Fig. 3-5 etwa der normalen Größe solcher Rippenausbildungen entsprechen, wird hieraus deutlich, daß nicht unbeträchtliche Faltungszwickel zwischen dieser Innenschale 7 und der Feuerraumwand 11 entstehen, welche Zwickel 8 entsprechende Wärmeübergangsbarrieren darstellen. Um diese Barrieren, die flächenmäßig aufgrund der Vielzahl der Rippen durchaus etwa ein Viertel bis ein Drittel der gesamten verfügbaren Wärmeübertragungsfläche bilden können, zu reduzieren und den gewünschten und erhöhten Wärmeabfluß aus der Brennkammerwand 1 zu optimieren, ist im feuerraumwandseitigen Faltungszwickel 8 jeder Rippenfaltung 5 ein dem Zwickelquerschnitt im Querschnitt entsprechendes Füllprofil 9 angeordnet. Zweckmäig und vorteilhaft kann dabei relativ weiches metallisches Material verwendet werden, um beim Zusammenpressen der Komponenten eine möglichst optimale Ausfüllung des Zwickelvolumens zu erreichen. Gemäß Fig. 4 ist es aber auch möglich, den Heizkessel derart auszubilden, daß im Bereich 12 der feuerraumwandseitigen Faltungszwickel 8 jeder Rippenfaltung 5 die Feuerraumwand 11 in den Zwickelraum 8 hinein an die Innenschale 7 angeformt bzw. eingepreßt wird.The enlarged sectional views of FIGS. 3-5 in relation to FIGS. 1, 2 relate to a particular embodiment of such heating boilers in which the longitudinal ribs 4 are obtained by unfolding a corresponding sheet metal blank, the overall and corresponding Cylindrical rounded and made endless as an inner shell in the combustion chamber 6 is used to conduct heat to the combustion chamber wall 11. 3-5 approximately correspond to the normal size of such rib designs, it is clear from this that not inconsiderable folding gussets arise between this inner shell 7 and the combustion chamber wall 11, which gussets 8 represent corresponding heat transfer barriers. In order to reduce these barriers, which can form about a quarter to a third of the total available heat transfer area due to the large number of ribs, and to optimize the desired and increased heat flow from the combustion chamber wall 1, each rib fold 5 in the combustion chamber wall-side fold gusset 5 is one of them Gusset cross section arranged in cross section corresponding filling profile 9. Relatively soft metallic material can be expediently and advantageously used in order to achieve the best possible filling of the gusset volume when the components are pressed together. According to FIG. 4, however, it is also possible to design the boiler in such a way that in the region 12 of the folding gusset 8 on the combustion chamber wall side of each rib fold 5, the combustion chamber wall 11 is molded or pressed into the gusset chamber 8 onto the inner shell 7.

Claims (6)

1. A heating boiler for the combustion of liquid or gaseous fuels, comprising a water-carrying housing including a cylindrical firing chamber in which is located a combustion chamber in the free space between the end rims of fins extending along the water-cooled firing clamber wall at least in part across the length of the firing chamber and subdividing the annular cylindrical heating gas flue into individual channels, characterized in that all respectively opposing and processed fin end edges (3) are at the same distance (D) from one another and the wall (1) of the combustion chamber (2) to be inserted the diameter (D₁) of which is slightly larger than the distance (D) of the processed fin edges (3), is pressure-connected, in heat conductive manner, to all processed end edges (3) of the longitudinal fins (4), and the wall (1) of the combustion chamber (2) is formed of at least two rings (17) which, when series-arranged, correspond to the length (L) of the combustion chamber.
2. A heating boiler according to claim 1, characterized in that the ring (17′) disposed at the greatest distance from the burner (20) is formed of condensate-resistant material, preferably stainless steel sheet.
3. A heating boiler according to claims 1 or 2, characterized in that the rings (17) on one side thereof are provided with an offset (18) facing toward the interior of the combustion chamber and extending across the offset-free rim (19) of the respective connecting ring.
4. A heating boiler according to any one of claims 1 to 3, wherein the longitudinal fins (4) are configured as foldings (5) of an internal shell (7) conforming in shape and inserted into the cylindrical firing chamber (6), characterized in that disposed in the firing chamber wall-sided folding spandrel (8) of each fin folding (5) is a filling profile (9) corresponding in cross-section to the spadrel cross-section.
5. A heating boiler according to any one of claims 1 to 3, wherein the longitudinal fins (4) are configured as foldings (5) of an internal shell (7) conforming in shape and inserted into the cylindrical firing chamber (6), characterized in that a heat-conducting filling material (10) is provided in the firing wall-sided folding spandrel (8) of each fin folding (5).
6. A heating boiler according to any one of claims 1 to 3, wherein the longitudinal fins (4) are configured as foldings (5) of an internal shell (7) conforming in shape and inserted into the cylindrical firing chamber, characterized in that, in the area (12) of the firing chamber wall-sided folding spandrel (8) of each fin folding (5), the firing clamber wall (11) is forced into the spandrel chamber (8) and moulded to the internal shell (7).
EP89110107A 1988-06-04 1989-06-04 Heating boiler for combustion of fluid or gaseous fuels Expired - Lifetime EP0345683B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89110107T ATE68586T1 (en) 1988-06-04 1989-06-04 BOILERS FOR COMBUSTION OF LIQUID OR GASEOUS FUELS.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3819072 1988-06-04
DE3819072 1988-06-04
DE3831238 1988-09-14
DE3831238 1988-09-14

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EP0345683A2 EP0345683A2 (en) 1989-12-13
EP0345683A3 EP0345683A3 (en) 1990-12-12
EP0345683B1 true EP0345683B1 (en) 1991-10-16

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EP89110107A Expired - Lifetime EP0345683B1 (en) 1988-06-04 1989-06-04 Heating boiler for combustion of fluid or gaseous fuels

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DE (1) DE58900373D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU187963U1 (en) * 2018-11-27 2019-03-26 Федеральное государственное бюджетное образовательное учреждение высшего образования "Омский государственный технический университет" (ОмГТУ) VACUUM FIRE BOILER

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT406518B (en) * 1994-12-21 2000-06-26 Vaillant Gmbh Heating boiler
RU171812U1 (en) * 2016-03-24 2017-06-16 Вячеслав Григорьевич Гоман OUTDOOR BOILER

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE458680A (en) *
CH646773A5 (en) * 1979-02-19 1984-12-14 Viessmann Hans HEATING BOILER liquids for OR GASFOERMIGE FUELS.
DE8531100U1 (en) * 1985-11-04 1987-10-29 Viessmann, Hans, Dr.H.C., 3559 Battenberg, De
DE3612909A1 (en) * 1986-04-17 1987-10-22 Viessmann Hans Heating boiler
DE3612908A1 (en) * 1986-04-17 1987-10-22 Viessmann Hans Heating boiler

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU187963U1 (en) * 2018-11-27 2019-03-26 Федеральное государственное бюджетное образовательное учреждение высшего образования "Омский государственный технический университет" (ОмГТУ) VACUUM FIRE BOILER

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EP0345683A3 (en) 1990-12-12
EP0345683A2 (en) 1989-12-13
DE58900373D1 (en) 1991-11-21

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