EP0231424A1 - Air heating stove for solid fuel - Google Patents

Air heating stove for solid fuel Download PDF

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Publication number
EP0231424A1
EP0231424A1 EP86107551A EP86107551A EP0231424A1 EP 0231424 A1 EP0231424 A1 EP 0231424A1 EP 86107551 A EP86107551 A EP 86107551A EP 86107551 A EP86107551 A EP 86107551A EP 0231424 A1 EP0231424 A1 EP 0231424A1
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EP
European Patent Office
Prior art keywords
combustion chamber
warm air
oven according
end wall
air oven
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.)
Granted
Application number
EP86107551A
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German (de)
French (fr)
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EP0231424B1 (en
Inventor
Erhard Knöfler
Karl-Heinz Schrader
Werner Ullmer
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Energetec Gesellschaft fur Energietechnik Mbh
Original Assignee
Energetec Gesellschaft fur Energietechnik Mbh
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Priority to AT86107551T priority Critical patent/ATE55638T1/en
Publication of EP0231424A1 publication Critical patent/EP0231424A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
    • F24B7/00—Stoves, ranges or flue-gas ducts, with additional provisions for convection heating 
    • F24B7/04—Stoves, ranges or flue-gas ducts, with additional provisions for convection heating  with internal air ducts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
    • F24B5/00—Combustion-air or flue-gas circulation in or around stoves or ranges
    • F24B5/02—Combustion-air or flue-gas circulation in or around stoves or ranges in or around stoves
    • F24B5/021—Combustion-air or flue-gas circulation in or around stoves or ranges in or around stoves combustion-air circulation
    • F24B5/025—Supply of secondary air for completing combustion of fuel

Definitions

  • the invention relates to a warm air furnace for solid fuels of the type specified in the preamble of claim 1.
  • Such warm air ovens are known on the market due to obvious prior uses. They have an adjustable opening in the area of the fire door for the admission of primary combustion air, which pulls with the flue gases through the combustion chamber by deflecting through a plate forming the deflecting device to the front over the top of the deflecting plate towards the back to the flue gas outlet.
  • a sufficiently long flue gas duct is thus available within the combustion chamber, but it has been shown that the combustion process can be improved by feeding in secondary combustion air, the efficiency of the furnace can thus be increased and the exhaust gases can be relieved of soot components.
  • Warm air ovens of the generic type are, however, subject to special laws as convection ovens, in which the flue gas guidance must be coordinated with the heat removal through the convention air flowing through the pipe bends of the combustion chamber jacket.
  • the particular advantage of a warm air furnace for solid fuels according to the invention is that the nozzles introducing the secondary air are arranged in the flue gas duct where, on the one hand, the combustion process already suffers from a lack of oxygen and, on the other hand, the combustion process as far as possible within the coating area of the pipe bends forming the combustion chamber jacket before the smoke extraction is completed that the additional heat yield can be removed from the pipe bends via the convection air flowing therein.
  • the secondary air can either be taken from the outside air, for this purpose there are corresponding inlet openings, for example in the front end wall of the combustion chamber, with which the nozzles are connected.
  • the secondary air can also be introduced through a feed line laid in a flue gas pipe forming the deflection device to nozzles arranged in front of the inlet end of this flue gas pipe.
  • the secondary air can also be removed as preheated air from the inside of the pipe bends, but devices for controlling the amount of secondary air supplied then become more difficult.
  • the 1 shows a central combustion chamber 1, which is essentially surrounded by a hollow cylinder, the axis of which is horizontal.
  • the jacket of the combustion chamber 1 is partially formed by pipe bends 2, which lie congruently one behind the other in the axial direction of the furnace and loop around the combustion chamber 1 alternately from the right and from the left over half the circumference from bottom to top or vice versa.
  • the distance between the pipe bends 2 on the side opposite a pipe bend 2 is closed by interposed wall sections 7, which are curved in the same way as the pipe bends 2.
  • the front boundary of the combustion chamber 1 forms an end wall 8 with a fire door 9, into which an adjustable inlet 10 for primary combustion air is inserted.
  • the rear end of the combustion chamber 1 is formed by a rear end wall 11 opposite the front end wall 8, which has a flue gas outlet 12 on its upper side.
  • a deflection device 13 in the form of a plate is attached to the inside of the rear end wall 11, which tightly adjoins the pipe bends 2 and the intermediate walls 7 on both sides. It does not reach all the way up to the front end wall 8 in order to form with its exposed front edge 15 a transfer opening 16 for the flue and combustion gases, which thus deflects forward again below the deflection plate 13 from the rear region of the combustion chamber 1 and then directed over the top of the baffle plate 13 to the flue gas outlet 12.
  • a deflector web 14 sits on the front edge 15 of the deflection plate 13, which protrudes upwards and is concavely curved on its side facing the front end wall 8 of the combustion chamber 1. On the one hand, it runs tangentially in the horizontal direction at the front edge 15 of the deflection plate 13 and with its exposed upper edge approximately tangentially in the vertical direction.
  • FIG. 1 and 2 further show, extend from inlet openings 19 in the front combustion chamber end wall 8 to the area above the deflection plate 13 pipe pieces 17, each having an outlet nozzle 18 at the end.
  • secondary combustion air is introduced into that area above the deflection plate 13 in which a swirl of the combustion and flue gases forms on the front edge 15 of the deflection plate 13 due to the deflector web 14.
  • the supply of secondary air can be controlled by rotary valve 20 at the inlet openings 19 in the combustion chamber end wall 8.
  • the nozzles 18 for introducing the secondary air are arranged directly in front of the front edge 15 of the deflection plate 13, which of course, as in the embodiment according to FIGS. 1 and 2, backwards to the flue gas outlet 12 are directed towards.
  • the nozzles are located here on pipe sections 21, which are inserted into the lateral pipe bends 2, in order to extract convection air heated from there as secondary air.
  • the pipe sections 21 have angled inlet ends 22 which each have a downwardly directed inlet opening 23.
  • the pipe sections 21 each form a nozzle assembly 24, which can have a plurality of nozzles 18 or nozzle openings.
  • the pipe sections 17 of the exemplary embodiment according to FIGS. 1 and 2 can also be designed as nozzle assemblies, which then, as can be seen from FIG. 3, lie approximately parallel in front of or above the front edge 15 of the deflection plate 13.
  • Fig. 4 now shows a warm air oven, which has a differently designed deflection device 13 in the combustion chamber 1, namely here the deflection device 13 consists of a flue gas pipe 25, which as an extension of the flue gas outlet 12 in the area of the rear End wall 11 protrudes forward into the combustion chamber 1.
  • the flue gas pipe 25 is perpendicular to the plane spanned by the rear end wall 11 of the combustion chamber 1; it can also be arranged to rise or fall slightly if this is advantageous for the flue gas flow.
  • the flue gas pipe 25 has the advantage of not stressing the jacket of the combustion chamber 1 with expansion or contraction stresses due to the action of heat.
  • One can also influence the exhaust gas temperature via the length and dimensioning of the flue gas pipe 25 in order to be able to comply with the prescribed limit values.
  • the secondary air feed takes place via a nozzle assembly 24 which is arranged at a suitable distance from the front opening of the flue gas pipe 25.
  • nozzle assembly 24 is connected to a feed line 26 which is passed through the flue gas pipe 25.
  • the feed line 26 is supported in the flue gas pipe 25 in such a way that the nozzle assembly 24 can be suspended thereon without further support being required on the combustion chamber wall.
  • the feed line 26 of the nozzle assembly 24 is guided backwards through the flue gas outlet 12 in the end wall 11 and only then emerges essentially radially out of the flue gas pipe 25, which is correspondingly extended beyond the outside of the rear end wall 11 of the combustion chamber 1.
  • the rear end 27 of the feed line 26 is laid on the outside of the rear combustion chamber end wall 11 in such a way that it is pulled out laterally essentially parallel to the adjacent lower end of the nearest pipe bend 2. Different from in Fig. 4, the rear end 27 of the feed line 26 can be dimensioned in the same way as the adjacent pipe bend 2, so that the secondary air inlet does not appear to be a nuisance.
  • the above-described supply of secondary air from the rear of the furnace can in principle also be provided when using a plate as a deflection device, as explained with reference to FIGS. 1 to 3.
  • the feed line 26 is then led above or below the deflection plate 13 to the nozzles 18 or the nozzle assembly 24 in the arrangement described.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Supply (AREA)
  • Solid-Fuel Combustion (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Treatment Of Sludge (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)

Abstract

1. Hot-air furnace for solid fuels having an essentially cylindrical combustion chamber (1), arranged in lying position, the shell casing of which is partially formed by pipe elbows (2) extending in the circumferential direction and arranged identically one after another, which pipe elbows project on the outside at the top and the bottom and are open at their upper and lower ends, and furthermore, the combustion chamber (1) has at its front end wall (8) a fire door and (9) in the upper region of its rear end wall (2) a flue gas extractor (12) and has a deflection device (13) which extends from the rear end wall (11) of the combustion chamber into the front region of the combustion chamber, characterized in that tuyeres (18), introducing secondary air, are arranged in front of or above the deflection device (13), which tuyeres are arranged on pipe sections (21) which are introduced with their inlet ends (22) into two of the pipe elbows (2) arranged on both sides of the combustion chamber (1).

Description

Die Erfindung bezieht sich auf einen Warmluftofen für feste Brennstoffe der im Gattungsbegriff des Patentanspruchs 1 näher bezeichneten Art.The invention relates to a warm air furnace for solid fuels of the type specified in the preamble of claim 1.

Solche Warmluftöfen sind durch offenkundige Vorbenutzungen auf dem Markt bekannt. Sie besitzen im Bereich der Feuertür eine verstell­bare Öffnung zum Einlaß von primäer Verbrennungs­luft, die mit den Rauchgasen durch die Brennkammer hindurch unter Umlenkung durch eine die Umlenkvorrichtung bildende Platte nach vorne hin über die Oberseite der Umlenk­plasse nach hinten weg zum Rauchgasabzug zieht. Zwar steht somit innerhalb der Brennkammer eine ausreichend lange Rauchgasführung zur Verfügung, dennoch hat sich gezeigt, daß durch Einspeisung von sekundärer Verbrennungsluft der Verbrennungsvorgang verbessert, der Wirkungsgrad des Ofens somit gesteigert und die Abgase von Rußanteilen entlastet werden können.Such warm air ovens are known on the market due to obvious prior uses. They have an adjustable opening in the area of the fire door for the admission of primary combustion air, which pulls with the flue gases through the combustion chamber by deflecting through a plate forming the deflecting device to the front over the top of the deflecting plate towards the back to the flue gas outlet. A sufficiently long flue gas duct is thus available within the combustion chamber, but it has been shown that the combustion process can be improved by feeding in secondary combustion air, the efficiency of the furnace can thus be increased and the exhaust gases can be relieved of soot components.

Es ist zwar an sich bekannt, bei Öfen für feste Brennstoffe durch Sekundärlufteinleitung den Verbrennungsvorgang zu optimieren. Warmluftöfen der gattungsgemäßen Art sind jedoch als Konvektionsöfen besonderen Gesetzen unterworfen, bei denen die Rauchgasführung auf den Wärmeentzug durch die durch die Rohrbögen des Brennkammermantels hindurchströmende Konventionsluft abgestimmt sein muß.It is known per se to optimize the combustion process in solid fuel stoves by introducing secondary air. Warm air ovens of the generic type are, however, subject to special laws as convection ovens, in which the flue gas guidance must be coordinated with the heat removal through the convention air flowing through the pipe bends of the combustion chamber jacket.

Es liegt daher der Erfindung die Aufgabe zugrunde, einen Warmluftofen der gattungsgemäßen Art dadurch zu ver­bessern, daß sekundäre Verbrennungsluft an einer geeigneten Stelle in die Rauchgasführung eingeleitet wird, um eine optimale Verbrennung mit hoher Energieausbeute sicher­zustellen.It is therefore the object of the invention to improve a warm air oven of the generic type by introducing secondary combustion air into the flue gas duct at a suitable point in order to ensure optimal combustion with a high energy yield.

Der besondere Vorteil eines erfindungsgemäßen Warmluft­ofens für feste Brennstoffe liegt darin, daß die die Sekundärluft einleitenden Düsen dort in der Rauchgas­führung angeordnet sind, wo einerseits der Verbrennungs­vorgang bereits an Sauerstoffmangel leidet und anderer­seits noch innerhalb des Bestreichungsbereichs der den Brennkammermantel bildenden Rohrbögen vor dem Rauchabzug der Verbrennungsvorgang soweit abgeschlossen ist, daß die zusätzliche Wärmeausbeute von den Rohrbögen über die darin strömende Konvektionsluft abgenommen werden kann.The particular advantage of a warm air furnace for solid fuels according to the invention is that the nozzles introducing the secondary air are arranged in the flue gas duct where, on the one hand, the combustion process already suffers from a lack of oxygen and, on the other hand, the combustion process as far as possible within the coating area of the pipe bends forming the combustion chamber jacket before the smoke extraction is completed that the additional heat yield can be removed from the pipe bends via the convection air flowing therein.

In vorteilhafter Ausgestaltung der Erfindung kann die Sekundärluft entweder der Außenluft entnommen werden, dazu finden sich dann entsprechende Einlaßöffnungen beispielsweise in der vorderen Stirnwand der Brennkammer, mit denen die Düsen verbunden sind. In anderer Aus­gestaltung der Erfindung kann die Sekundärluft auch durch eine in einem die Umlenkvorrichtung bildenden Rauchgasrohr verlegte Zuleitung zu vor dem Einlaßende dieses Rauchgasrohres angeordneten Düsen hin eingeleitet werden. Auch kann die Sekundärluft als vorgewärmte Luft aus dem Innern der Rohrbögen entnommen werden, wobei sich dann allerdings Vorrichtungen zur Steuerung der zugeführten Sekundärluftmenge schwieriger gestalten.In an advantageous embodiment of the invention, the secondary air can either be taken from the outside air, for this purpose there are corresponding inlet openings, for example in the front end wall of the combustion chamber, with which the nozzles are connected. In another embodiment of the invention, the secondary air can also be introduced through a feed line laid in a flue gas pipe forming the deflection device to nozzles arranged in front of the inlet end of this flue gas pipe. The secondary air can also be removed as preheated air from the inside of the pipe bends, but devices for controlling the amount of secondary air supplied then become more difficult.

Weitere vorteilhafte Ausgestaltungsmerkmale der Erfindung ergeben sich aus den Unteransprüchen.Further advantageous design features of the invention result from the subclaims.

Die Erfindung wird nachfolgend anhand der Zeichnung an Ausführungsbeispielen noch näher erläutert. Dabei zeigen:

  • Fig. 1 eine perspektivische, aufgeschnittene Darstellung eines Warmluftofens mit einer ersten Ausführungsform von Sekundärluft einspeisenden Düsen,
  • Fig. 2 einen schematischen Querschnitt durch den Ofen nach Fig. 1,
  • Fig. 3 einen schematischen Querschnitt durch einen ähnlich der Fig. 1 aufgebauten Ofen, jedoch mit einem geänderten Düsenstock für die Sekundärluftdüsen, und
  • Fig. 4 eine perspektivische, aufgeschnittene Darstellung eines Warmluftofens in einer weiteren Ausführungsform.
The invention is explained in more detail below with the aid of exemplary embodiments. Show:
  • 1 is a perspective, cut-away representation of a warm air oven with a first embodiment of secondary air feeding nozzles,
  • 2 shows a schematic cross section through the furnace according to FIG. 1,
  • Fig. 3 is a schematic cross section through an oven constructed similar to FIG. 1, but with a modified nozzle assembly for the secondary air nozzles, and
  • Fig. 4 is a perspective, cut-away view of a warm air oven in a further embodiment.

In der Gesamtdarstellung eines Warmluftofens nach Fig. 1 erkennt man eine zentrale Brennkammer 1, die im wesent­lichen von einem Hohlzylinder umgeben wird, dessen Achse horizontal liegt. Der Mantel der Brennkammer 1 wird teilweise durch Rohrbögen 2 gebildet, die in Axialrichtung des Ofens deckungsgleich hintereinander liegen und die Brennkammer 1 abwechselnd von der rechten und von der linken Seite her jeweils über den halben Umfang von unten nach oben bzw. umgekehrt umschlingen. Der Abstand zwischen den Rohrbögen 2 auf der jeweils einem Rohrbogen 2 gegenüberliegenden Seite wird durch zwischengesetzte Wandabschnitte 7 geschlossen, die in gleicher Weise wie die Rohrbögen 2 gekrümmt sind. Schräg nach unten mit einem geringen Neigungswinkel gegenüber der Horizontalen schließen an die Rohrbögen 2 zu beiden Seiten tangential fortgeführte Verlängerungen 4 mit Lufteinlaßöffnungen 5 an, und entsprechend dazu finden sich an den Oberenden der Rohrbögen 2 seitlich nach oben schräg vorstehende Verlängerungen 3 mit je einer endseitigen Luftaustritt­öffnung 6. Beim Betrieb des Ofens strömt aufgrund von Konvektion innerhalb der Rohrbögen 2 Luft, die an den unteren Eintrittsöffnungen 5 kalt eintritt und an den oberen Austrittsöffnungen 6 erwärmt austritt.1 shows a central combustion chamber 1, which is essentially surrounded by a hollow cylinder, the axis of which is horizontal. The jacket of the combustion chamber 1 is partially formed by pipe bends 2, which lie congruently one behind the other in the axial direction of the furnace and loop around the combustion chamber 1 alternately from the right and from the left over half the circumference from bottom to top or vice versa. The distance between the pipe bends 2 on the side opposite a pipe bend 2 is closed by interposed wall sections 7, which are curved in the same way as the pipe bends 2. Sloping downwards with a slight angle of inclination with respect to the horizontal close to the pipe bends 2 on both sides of tangentially extended extensions 4 with air inlet openings 5, and accordingly there are at the upper ends of the pipe bends 2 laterally upwardly projecting extensions 3, each with an end air outlet opening 6. During operation of the furnace, there is a flow due to convection air inside the pipe bends 2, which enters cold at the lower inlet openings 5 and exits heated at the upper outlet openings 6.

Die vordere Begrenzung der Brennkammer 1 bildet eine Stirnwand 8 mit einer Feuertür 9, in die ein verstellbarer Einlaß 1o für primäre Verbrennungsluft eingesetzt ist.The front boundary of the combustion chamber 1 forms an end wall 8 with a fire door 9, into which an adjustable inlet 10 for primary combustion air is inserted.

Der rückwärtige Abschluß der Brennkammer 1 wird durch eine der vorderen Stirnwand 8 gegenüberliegende hintere Stirnwand 11 gebildet, die an ihrer Oberseite einen Rauchgasabzug 12 hat. Darunter ist an die Innenseite der hinteren Stirnwand 11 eine Umlenkvorrichtung 13 in Gestalt einer Platte angesetzt, die beidseits an die Rohrbögen 2 und die Zwischenwandungen 7 dicht anschließt. Sie reicht nach vorne nicht ganz bis an die vordere Stirnwand 8 heran, um mit ihrer freiliegenden Vorder­kante 15 eine Überleitungsöffnung 16 für die Rauch- und Verbrennungsgase zu bilden, die somit unterhalb der Umlenkplatte 13 aus dem rückwärtigen Bereich der Brennkammer 1 wieder nach vorne hin umgelenkt und dann über die Oberseite der Umlenkplatte 13 hinweg zum Rauchgasabzug 12 hingeleitet werden. Um eine gute Verwirbelung der Rauch- und Verbrennungsgase zu erreichen, sitzt an der Vorderkante 15 der Umlenkplatte 13 ein Abweisersteg 14, der nach oben vorsteht und an seiner zur vorderen Stirnwand 8 der Brennkammer 1 hin gelegenen Seite konkav gewölbt ist. Er läuft einerseits an der Vorderkante 15 der Umlenkplatte 13 tangential in die Horizontalrichtung und mit seiner freiliegenden Oberkante etwa tangential in die Vertikalrichtung aus.The rear end of the combustion chamber 1 is formed by a rear end wall 11 opposite the front end wall 8, which has a flue gas outlet 12 on its upper side. Below this, a deflection device 13 in the form of a plate is attached to the inside of the rear end wall 11, which tightly adjoins the pipe bends 2 and the intermediate walls 7 on both sides. It does not reach all the way up to the front end wall 8 in order to form with its exposed front edge 15 a transfer opening 16 for the flue and combustion gases, which thus deflects forward again below the deflection plate 13 from the rear region of the combustion chamber 1 and then directed over the top of the baffle plate 13 to the flue gas outlet 12. In order to achieve a good swirling of the smoke and combustion gases, a deflector web 14 sits on the front edge 15 of the deflection plate 13, which protrudes upwards and is concavely curved on its side facing the front end wall 8 of the combustion chamber 1. On the one hand, it runs tangentially in the horizontal direction at the front edge 15 of the deflection plate 13 and with its exposed upper edge approximately tangentially in the vertical direction.

Wie die Fig. 1 und 2 weiter zeigen, erstrecken sich von Einlaßöffnungen 19 in der vorderen Brennkammerstirnwand 8 bis in den Bereich oberhalb der Umlenkplatte 13 Rohr­stücke 17, die am Ende je eine Auslaßdüse 18 haben. Durch diese Rohrstücke 17 wird sekundäre Verbrennungsluft in denjenigen Bereich oberhalb der Umlenkplatte 13 eingeleitet, in dem sich aufgrund des Abweiserstegs 14 an der Vorderkante 15 der Umlenkplatte 13 ein Wirbel der Verbrennungs- und Rauchgase bildet. Die Zufuhr der Sekundärluft ist durch Drehschieber 20 an den Einlaß­öffnungen 19 in der Brennkammerstirnwand 8 steuerbar.1 and 2 further show, extend from inlet openings 19 in the front combustion chamber end wall 8 to the area above the deflection plate 13 pipe pieces 17, each having an outlet nozzle 18 at the end. Through these pipe sections 17, secondary combustion air is introduced into that area above the deflection plate 13 in which a swirl of the combustion and flue gases forms on the front edge 15 of the deflection plate 13 due to the deflector web 14. The supply of secondary air can be controlled by rotary valve 20 at the inlet openings 19 in the combustion chamber end wall 8.

Eine etwas andere Ausführung für die Sekundärlufteinleitung zeigt Fig. 3. Hier sind die Düsen 18 für die Einleitung der Sekundärluft unmittelbar vor der Vorderkante 15 der Umlenkplatte 13 angeordnet, die natürlich ebenso wie beim Ausführungsbeispiel nach den Fig. 1 und 2 nach rückwärts zum Rauchgasabzug 12 hin gerichtet sind. Allerdings sitzen die Düsen hier an Rohrabschnitten 21, die in die seitlichen Rohrbögen 2 eingeführt sind, um von dort erwärmte Konvektionsluft als Sekundärluft zu entnehmen. Innerhalb der Rohrbögen 2 besitzen die Rohrabschnitte 21 nach unten abgewinkelte Einlaßenden 22, die eine nach unten gerichtete Einlaßöffnung 23 jeweils haben. Mit den vorkragenden Innenabschnitten bilden die Rohrabschnitte 21 jeweils einen Düsenstock 24, der mehrere Düsen 18 oder Düsenöffnungen haben kann. In gleicher Weise können auch die Rohrstücke 17 des Ausführungsbeispiels nach den Fig. 1 und 2 als Düsenstöcke ausgebildet sein, die dann ebenso wie aus Fig. 3 ersichtlich etwa parallel vor oder oberhalb der Vorderkante 15 der Umlenkplatte 13 liegen.3 shows a somewhat different embodiment for the introduction of secondary air. Here, the nozzles 18 for introducing the secondary air are arranged directly in front of the front edge 15 of the deflection plate 13, which of course, as in the embodiment according to FIGS. 1 and 2, backwards to the flue gas outlet 12 are directed towards. However, the nozzles are located here on pipe sections 21, which are inserted into the lateral pipe bends 2, in order to extract convection air heated from there as secondary air. Within the pipe bends 2, the pipe sections 21 have angled inlet ends 22 which each have a downwardly directed inlet opening 23. With the projecting inner sections, the pipe sections 21 each form a nozzle assembly 24, which can have a plurality of nozzles 18 or nozzle openings. In the same way, the pipe sections 17 of the exemplary embodiment according to FIGS. 1 and 2 can also be designed as nozzle assemblies, which then, as can be seen from FIG. 3, lie approximately parallel in front of or above the front edge 15 of the deflection plate 13.

Fig. 4 veranschlaulicht nun einen Warmluftofen, der eine anders gestaltete Umlenkvorrichtung 13 in der Brennkammer 1 hat, und zwar besteht hier die Umlenkvorrichtung 13 aus einem Rauchgasrohr 25, welches als Verlängerung des Rauchgasabzuges 12 im Bereich der rückwärtigen Stirnwand 11 nach vorn hin in die Brennkammer 1 vorsteht. Im wesentlichen steht das Rauchgasrohr 25 senkrecht zu der von der rückwärtigen Stirnwand 11 der Brennkammer 1 aufgespannten Ebene, es kann auch leicht ansteigend oder abfallend angeordnet sein, wenn dies für die Rauchgasführung von Vorteil ist. Gegenüber der Umlenk­vorrichtung in Gestalt einer Platte hat das Rauchgasrohr 25 den Vorzug, den Mantel der Brennkammer 1 nicht mit Dehnungs- oder Kontraktionsspannungen aufgrund der Wärmeeinwirkung zu belasten. Auch kann man über die Länge und die Dimensionierung des Rauchgasrohres 25 einen Einfluß auf die Abgastemperatur nehmen, um hierfür vorgeschriebene Grenzwerte einhalten zu können.Fig. 4 now shows a warm air oven, which has a differently designed deflection device 13 in the combustion chamber 1, namely here the deflection device 13 consists of a flue gas pipe 25, which as an extension of the flue gas outlet 12 in the area of the rear End wall 11 protrudes forward into the combustion chamber 1. Essentially, the flue gas pipe 25 is perpendicular to the plane spanned by the rear end wall 11 of the combustion chamber 1; it can also be arranged to rise or fall slightly if this is advantageous for the flue gas flow. Compared to the deflection device in the form of a plate, the flue gas pipe 25 has the advantage of not stressing the jacket of the combustion chamber 1 with expansion or contraction stresses due to the action of heat. One can also influence the exhaust gas temperature via the length and dimensioning of the flue gas pipe 25 in order to be able to comply with the prescribed limit values.

Die Sekundärlufteinspeisung erfolgt bei der Ausführung nach Fig. 4 über einen Düsenstock 24, der in geeignetem Abstand vor der Vorderöffnung des Rauchgasrohres 25 angeordnet ist. In nicht dargestellter Ausführung können auch bei Verwendung des Rauchgasrohres 25 andere Düsen­formen verwendet werden, wie sie beispielsweise anhand der Figuren 1 bis 3 erläutert worden sind. Bei der hier beschriebenen Ausführung ist der Düsenstock 24 mit einer Zuleitung 26 verbunden, die durch das Rauchgasrohr 25 hindurchgeführt ist. Die Zuleitung 26 stützt sich derart in dem Rauchgasrohr 25 ab, daß daran der Düsenstock 24 aufgehängt werden kann, ohne daß eine weitere Abstützung an der Brennkammerwandung erforderlich ist. Die Zuleitung 26 des Düsenstocks 24 ist nach rückwärts bis durch den Rauchgasabzug 12 in der Stirnwand 11 hindurch­geführt und tritt dort erst im wesentlichen radial aus dem Rauchgasrohr 25 heraus, das entsprechend bie über die Außenseite der rückwärtigen Stirnwand 11 der Brennkammer 1 hinaus verlängert ist. Das rückwärtige Ende 27 der Zuleitung 26 ist an der Außenseite der rückwärtigen Brennkammerstirnwand 11 so verlegt, daß es im wesentlichen parallel zum benachbarten Unterende des nächstliegenden Rohrbogens 2 seitlich herausgezogen ist. Anders als in Fig. 4 dargestellt, kann das rückwärtige Ende 27 der Zuleitung 26 in gleicher Weise wie der benachbarte Rohrbogen 2 dimensioniert sein, so daß optisch die Sekundärlufteinleitung nicht störend in Erscheinung tritt.In the embodiment according to FIG. 4, the secondary air feed takes place via a nozzle assembly 24 which is arranged at a suitable distance from the front opening of the flue gas pipe 25. In an embodiment not shown, other nozzle shapes can also be used when using the flue gas pipe 25, as have been explained, for example, with reference to FIGS. 1 to 3. In the embodiment described here, the nozzle assembly 24 is connected to a feed line 26 which is passed through the flue gas pipe 25. The feed line 26 is supported in the flue gas pipe 25 in such a way that the nozzle assembly 24 can be suspended thereon without further support being required on the combustion chamber wall. The feed line 26 of the nozzle assembly 24 is guided backwards through the flue gas outlet 12 in the end wall 11 and only then emerges essentially radially out of the flue gas pipe 25, which is correspondingly extended beyond the outside of the rear end wall 11 of the combustion chamber 1. The rear end 27 of the feed line 26 is laid on the outside of the rear combustion chamber end wall 11 in such a way that it is pulled out laterally essentially parallel to the adjacent lower end of the nearest pipe bend 2. Different from in Fig. 4, the rear end 27 of the feed line 26 can be dimensioned in the same way as the adjacent pipe bend 2, so that the secondary air inlet does not appear to be a nuisance.

Die vorbeschriebene Zuführung der Sekundärluft von der Rückseite des Ofens her kann grundsätzlich auch bei Verwendung einer Platte als Umlenkvorrichtung,wie anhand der Fig. 1 bis 3 erläutert, vorgesehen werden. Die Zuleitung 26 wird dann ober- oder unterhalb der Umlenk­platte 13 bis zu den Düsen 18 oder dem Düsenstock 24 in der beschriebenen Anordnung hingeführt.The above-described supply of secondary air from the rear of the furnace can in principle also be provided when using a plate as a deflection device, as explained with reference to FIGS. 1 to 3. The feed line 26 is then led above or below the deflection plate 13 to the nozzles 18 or the nozzle assembly 24 in the arrangement described.

Claims (15)

1. Warmluftofen für feste Brennstoffe mit einer im wesentlichen zylindrischen, liegend angeordneten Brennkammer, deren Mantel zum Teil durch in Umfangsrichtung verlaufende sowie deckungsgleich hintereinander angeordnete Rohrbögen gebildet wird, die oben und unten außenseitig überstehen und an ihren Ober- und Unterenden offen sind, und die Brennkammer ferner an ihrer vorderen Stirnwand eine Feuertür sowie im oberen Bereich ihrer rückwärtigen Stirnwand einen Rauchgasabzug hat und eine Umlenkvorrichtung aufweist, die sich von der rückwärtigen Brennkammerstirnwand bis in den vorderen Brennkammerbereich hinein erstreckt, dadurch gekennzeichnet, daß vor oder oberhalb der Umlenkvorrichtung (13) Sekundärluft einleitende Düsen (18) angeordnet sind.1. Warm air furnace for solid fuels with a substantially cylindrical, lying combustion chamber, the shell of which is partly formed by circumferential and congruently arranged pipe bends, which protrude on the outside and above and are open at their top and bottom ends, and the Combustion chamber also has a fire door on its front end wall and a flue gas outlet in the upper region of its rear end wall and has a deflection device which extends from the rear combustion chamber end wall into the front combustion chamber region, characterized in that secondary air in front of or above the deflection device (13) introducing nozzles (18) are arranged. 2. Warmluftofen nach Anspruch 1,
dadurch gekennzeichnet, daß die Düsen (18) an zumindest einem Rohrstück (17) angeordnet sind, das an zumindest eine Lufteintrittsöfnung (19) in der vorderen Brennkammerstirnwand (8) angeschlossen ist.2. Warm air oven according to claim 1,
characterized in that the nozzles (18) are arranged on at least one pipe section (17) which is connected to at least one air inlet opening (19) in the front combustion chamber end wall (8). 3. Warmluftofen nach Anspruch 2,
dadurch gekennzeichnet, daß an der Lufteintritts­öffnung (19) ein Drehschieber (20) auf der Außenseite der Brennkammerstirnwand (8) angeordnet ist.3. Warm air oven according to claim 2,
characterized in that a rotary slide valve (20) is arranged on the outside of the combustion chamber end wall (8) at the air inlet opening (19). 4. Warmluftofen nach Anspruch 1,
dadurch gekennzeichnet, daß die Düsen (18) an Rohr­abschnitten (21) angeordnet sind, die mit ihren Einlaßenden (22) in zwei der beidseits der Brenn­kammer (1) angeordneten Rohrbögen (2) eingeführt sind.4. Warm air oven according to claim 1,
characterized in that the nozzles (18) are arranged on pipe sections (21) which are introduced with their inlet ends (22) into two pipe bends (2) arranged on both sides of the combustion chamber (1). 5. Warmluftofen nach Anspruch 4,
dadurch gekennzeichnet, daß die Einlaßenden (22) der Rohrabschnitte (21) innerhalb der Rohrbögen (2) nach unten abgewinkelt sind und eine nach unten liegende Einlaßöffnung (23) haben.5. Warm air oven according to claim 4,
characterized in that the inlet ends (22) of the pipe sections (21) within the pipe bends (2) are angled downward and have an inlet opening (23) lying downwards. 6. Warmluftofen nach einem der Ansprüche 2 bis 5,
dadurch gekennzeichnet, daß die Rohrstücke (17) bzw. die Rohrabschnitte (21) je einen Düsenstock (24) mit mehreren Düsen (18) bilden, der im wesentlichen horizontal in einer Querebene der Brennkammer (1) vor der Umlenkvorrichtung (13) angeordnet ist.6. Warm air oven according to one of claims 2 to 5,
characterized in that the pipe sections (17) and the pipe sections (21) each form a nozzle assembly (24) with a plurality of nozzles (18) which is arranged essentially horizontally in a transverse plane of the combustion chamber (1) in front of the deflection device (13) . 7. Warmluftofen nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß die Öffnungen der Düsen (18) in Richtung zum Rauchgasabzug (12) hin angeordnet sind.7. Warm air oven according to one of claims 1 to 6,
characterized in that the openings of the nozzles (18) are arranged in the direction of the flue gas outlet (12). 8. Warmluftofen nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, daß die Umlenkvorrichtung (13) eine sich an den Brennkammermantel anschließende, sich bis in den vorderen Brennkammerbereich erstreckende und mit ihrer Vorderkante (15) eine Rauchgasüberleitungsöffnung (6) begrenzende Platte ist.8. Warm air oven according to one of claims 1 to 7,
characterized in that the deflection device (13) is a plate adjoining the combustion chamber jacket, extending into the front combustion chamber region and delimiting with its front edge (15) a flue gas transfer opening (6). 9. Warmluftofen nach Anspruch 8,
dadurch gekennzeichnet, daß an oder nahe der Vorder­kante (15) sowie parallel dazu an der Umlenkplatte (13) ein nach oben vorstehender Abweisersteg (14) angeordnet ist.9. Warm air oven according to claim 8,
characterized in that an upwardly projecting deflector web (14) is arranged on or near the front edge (15) and parallel to it on the deflection plate (13). 10. Warmluftofen nach Anspruch 9,
dadurch gekennzeichnet, daß der Abweisersteg (14) an seiner zur Überleitungsöffnung (16) hin liegenden Vorderseite konkav gewölbt ist.10. Warm air oven according to claim 9,
characterized in that the deflector web (14) is concavely curved on its front side facing the transfer opening (16). 11. Warmluftofen nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, daß die Umlenkvorrichtung (13) durch ein den Rauchgasabzug (12) nach vorn hin verlängerndes Rauchgasrohr (25) gebildet ist, das im wesentlichen senkrecht von der rückwärtigen Stirnwand (11) vorsteht.11. Warm air oven according to one of claims 1 to 7,
characterized in that the deflection device (13) is formed by a flue gas pipe (25) which extends the flue gas discharge (12) towards the front and which projects essentially perpendicularly from the rear end wall (11). 12. Warmluftofen nach Anspruch 11,
dadurch gekennzeichnet, daß die Zuleitung (26) zu den die Sekundärluft einleitenden Düsen (18) durch das Rauchgasrohr (25) hindurchgeführt und im Bereich der rückwärtigen Stirnwand (11) nach außen heraus­geführt ist.12. Warm air oven according to claim 11,
characterized in that the supply line (26) to the nozzles introducing the secondary air (18) is passed through the flue gas pipe (25) and is led out in the region of the rear end wall (11). 13. Warmluftofen nach Anspruch 12,
dadurch gekennzeichnet, daß die Zuleitung (26) in dem Rauchgasrohr (25) abgestützt ist und an ihrem Vorderende den Düsenstock (24) trägt.13. Warm air oven according to claim 12,
characterized in that the feed line (26) is supported in the flue gas pipe (25) and carries the nozzle assembly (24) at its front end. 14. Warmluftofen nach Anspruch 12,
dadurch gekennzeichnet, daß das rückwärtige Ende (27) der Zuleitung (26) an der Außenseite der rückwärtigen Stirnwand (11) entlanggeführt und im wesentlichen parallel zum benachbarten Unterende des nächstliegen­den Rohrbogens (2) seitlich herausgezogen ist.14. Warm air oven according to claim 12,
characterized in that the rear end (27) of the feed line (26) is guided along the outside of the rear end wall (11) and is pulled out laterally essentially parallel to the adjacent lower end of the closest pipe bend (2). 15. Warmluftofen nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, daß die Zuleitung (26) zu den die Sekundärluft einspeisenden Düsen (18) ober- oder unterhalb der die Umlenkvorrichtung (13) bildenden Platte entlanggeführt und im Bereich der rückwärtigen Stirnwand herausgeführt ist.15. Warm air oven according to one of claims 1 to 7,
characterized in that the feed line (26) to the nozzles feeding the secondary air (18) is guided above or below the plate forming the deflection device (13) and is led out in the region of the rear end wall.
EP86107551A 1986-01-25 1986-06-03 Air heating stove for solid fuel Expired - Lifetime EP0231424B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86107551T ATE55638T1 (en) 1986-01-25 1986-06-03 SOLID FUEL HOT AIR FURNACE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863602285 DE3602285A1 (en) 1986-01-25 1986-01-25 WARM FURNACE FOR SOLID FUELS
DE3602285 1986-01-25

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EP0231424A1 true EP0231424A1 (en) 1987-08-12
EP0231424B1 EP0231424B1 (en) 1990-08-16

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ID=6292656

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EP86107551A Expired - Lifetime EP0231424B1 (en) 1986-01-25 1986-06-03 Air heating stove for solid fuel

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EP (1) EP0231424B1 (en)
AT (1) ATE55638T1 (en)
DE (2) DE3602285A1 (en)
ES (1) ES8707333A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1327836A1 (en) * 2002-01-09 2003-07-16 Christian Born Air heating stove
BG1064U1 (en) * 2007-01-31 2008-05-30 Александър РАЕВСКИЙ Heating stove
DE202007006228U1 (en) 2007-04-28 2008-09-04 Kurz, Franz J. Furnace for solid fuels
DE202011051990U1 (en) 2011-11-16 2012-01-18 Lars Betzner Stove with improved efficiency
EP2455666A1 (en) 2010-11-17 2012-05-23 József Simkó Closed stove with improved efficiency
WO2015051911A1 (en) * 2013-10-09 2015-04-16 Bullerjan Gmbh Fireplace
EP3306200A1 (en) 2016-10-05 2018-04-11 Bullerjan GmbH Convection stove

Families Citing this family (5)

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RU2090804C1 (en) * 1996-04-22 1997-09-20 Рафаэл Газетов Generator heat utilizer
DE19907990A1 (en) * 1999-02-25 2000-09-07 Heinrich Heil Room heating stove with combustion chamber has chamber surrounded by air channel and uses chamber segments arranged so fired chamber sets up independent air flow in channel.
EA020432B1 (en) * 2012-01-09 2014-11-28 Жиргалбек Омуралиевич САРЫМСАКОВ Heating boiler
DE202012104747U1 (en) 2012-12-06 2013-01-30 Bulyfire S.R.O. Hot air and / or heat exchanger furnace for solid fuels
RU2763984C1 (en) * 2021-06-07 2022-01-12 Вадим Сергеевич Рыжов Long burning heating stove

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US4320737A (en) * 1977-12-05 1982-03-23 Wolf Mert L Flue arrangement for stove and fireplace
DE2917125A1 (en) * 1978-05-01 1979-11-15 Eric Darnell STOVE
DE3140498A1 (en) * 1981-10-13 1983-04-21 Werner, geb. Ohms, Frauke, 6054 Rodgau Heating oven with multifuel combustion space and secondary-air supply
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1327836A1 (en) * 2002-01-09 2003-07-16 Christian Born Air heating stove
BG1064U1 (en) * 2007-01-31 2008-05-30 Александър РАЕВСКИЙ Heating stove
DE202007006228U1 (en) 2007-04-28 2008-09-04 Kurz, Franz J. Furnace for solid fuels
EP2455666A1 (en) 2010-11-17 2012-05-23 József Simkó Closed stove with improved efficiency
DE202011051990U1 (en) 2011-11-16 2012-01-18 Lars Betzner Stove with improved efficiency
WO2015051911A1 (en) * 2013-10-09 2015-04-16 Bullerjan Gmbh Fireplace
EP3306200A1 (en) 2016-10-05 2018-04-11 Bullerjan GmbH Convection stove
WO2018065320A1 (en) 2016-10-05 2018-04-12 Bullerjan Gmbh Convection oven

Also Published As

Publication number Publication date
DE3602285A1 (en) 1987-07-30
DE3673513D1 (en) 1990-09-20
ES556504A0 (en) 1987-07-16
EP0231424B1 (en) 1990-08-16
ATE55638T1 (en) 1990-09-15
ES8707333A1 (en) 1987-07-16

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