EP0496094A2 - Nozzle for feeding secondary air - Google Patents

Nozzle for feeding secondary air Download PDF

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Publication number
EP0496094A2
EP0496094A2 EP91122012A EP91122012A EP0496094A2 EP 0496094 A2 EP0496094 A2 EP 0496094A2 EP 91122012 A EP91122012 A EP 91122012A EP 91122012 A EP91122012 A EP 91122012A EP 0496094 A2 EP0496094 A2 EP 0496094A2
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EP
European Patent Office
Prior art keywords
flange
secondary air
jacket
nozzle
nozzles
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
EP91122012A
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German (de)
French (fr)
Other versions
EP0496094B1 (en
EP0496094A3 (en
Inventor
Walter Josef Dipl.-Ing. Martin
Johannes Josef Edmund Dipl.-Ing. Martin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Martin GmbH fuer Umwelt und Energietechnik
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Martin GmbH fuer Umwelt und Energietechnik
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Publication of EP0496094A2 publication Critical patent/EP0496094A2/en
Publication of EP0496094A3 publication Critical patent/EP0496094A3/en
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Publication of EP0496094B1 publication Critical patent/EP0496094B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel 
    • F23L9/02—Passages or apertures for delivering secondary air for completing combustion of fuel  by discharging the air above the fire

Definitions

  • the invention relates to a method for supplying secondary air into a firing system with a mechanical firing grate through which primary air is introduced and a firing chamber formed thereover and delimited by boundary walls, in which by means of nozzles which are arranged at least in the front and rear boundary walls. Secondary air is blown in.
  • the invention also relates to a nozzle for performing the method.
  • the object of the invention is to avoid the caking occurring on a boundary wall or a plurality of boundary walls of the combustion chamber.
  • the secondary air By dividing the secondary air into a portion directed into the combustion chamber and a portion directed parallel to the boundary wall, the latter forms a veil on the boundary wall which is able to trap some of the fuel particles so that they cannot reach the boundary wall . Insofar as this is not possible because the particles have too great a kinetic energy, this fuel particles are at least cooled to such an extent that they no longer adhere to the boundary wall. This simple measure has thus solved a serious problem which, as already explained, has had serious consequences so far.
  • a nozzle for carrying out the method is characterized in that it has an outer jacket which tapers conically in the direction of flow, a cylindrical inner jacket and a flange which holds the two jackets concentrically to one another and firmly connects one another, which the inner jacket penetrates and one which the outer jacket at its Flange facing end exceeding Has diameter and that the outer jacket is attached to the end face of the flange and at least one peripheral region is formed as an end slot nozzle between the outer jacket and the flange.
  • the inner jacket is shorter than the outer jacket and in a further embodiment of the invention has a length that is between 3 times and 6 times its diameter.
  • the end of the inner jacket located in the interior of the outer jacket is designed as a cutting edge with an inside diameter widening outwards with a constant outside diameter.
  • a section of a firing system is shown in schematic form, which has a fire grate 1 and a feed table 2 with feed pistons 3, which push the fuel fed through a feed chute 4 onto the firing grate.
  • the upwardly extending combustion chamber 5 is formed in its first part, which is bounded by a front boundary wall 6, a rear boundary wall 7 and side walls 8.
  • the combustion material lying on the grate 1 is supplied with primary combustion air from below through the grate.
  • secondary air nozzles 10 and 11 are preferably provided in the area of the front boundary wall 6 and in the area of the rear boundary wall 7, which blow additional combustion air into the combustion chamber in order to keep the unburned parts upwards rise the firebox to subject it to further combustion.
  • the secondary air Nozzles 11 of the rear boundary wall are designed so that this deposit is prevented by a special air duct.
  • the secondary air nozzle is constructed from an outer jacket 12 and an inner jacket 13 which passes through a flange 14 and with this, z. B. is firmly connected by welding.
  • the outer jacket 12 is connected on the end face to the flange 14, namely by interposing two arc-shaped spacers 16 and 17, which are firmly connected on the one hand to the flange 14 and on the other hand to the end face of the outer case 12, as a result of which slot-shaped nozzles 15 between the end members of the outer casing 12 and the flange 14 remain, from which air can escape, which is supplied by means of a feed line (not shown) which can be connected to the end 19 of the outer casing 12.
  • This air is divided into two parts by the inner jacket 13, which has a cutting edge 20 at its end located inside the outer jacket 12, one part of the secondary air flowing inside the inner jacket 13 and from the free end 21 into the combustion chamber perpendicular to Boundary wall 7 emerges while the other part of the air between the
  • the outer surface of the inner shell 13 and the inner surface of the outer shell 12 flows to the slit-shaped nozzles 15 between the end face of the outer shell 12 and the flange 14 and flows out there essentially parallel to the rear boundary wall 7 from the secondary air nozzle, designated as 11, and acts as a veil parallel to it Boundary wall spreads out.
  • Baking of combustible particles on the boundary wall 7 of the combustion chamber is avoided by this air emerging essentially parallel to the boundary wall 7 between the end face of the outer shell 12 and the flange 14, which projects significantly beyond the outer diameter of the outer flange at this point.
  • the secondary air nozzle according to FIGS. 4 and 5 essentially corresponds to that according to FIGS. 2 and 3, so that matching parts are provided with the same reference numbers. The only difference is that four spacers 16, 16a, 17 and 17a are provided between the flange 14 and the outer jacket 12, so that four opposing nozzles 15 are formed.

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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)
  • Exhaust Gas After Treatment (AREA)
  • Solid-Fuel Combustion (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Catching Or Destruction (AREA)
  • Nozzles (AREA)

Abstract

The secondary air jets (11) that are arranged within the combustion space (5) consist of an outer casing (12), an inner casing (13), and a flange (14) that connects the two casings to each other, the flange (14) crossing the inner casing (13) and being rigidly connected with this, whereas the outer casing (12) is so connected to the flange that is of greater diameter than the outer casing (12) that slot-type jets (15) are left between the face side of the outer casing (12) and the flange (14), these jets making it possible to expel air parallel to the defining wall and essentially perpendicular to the axis of the jets.

Description

Die Erfindung bezieht sich auf ein Verfahren zum Zuführen von Sekundärluft in eine Feuerungsanlage mit einem mechanischen Feuerungsrost, durch den Primärluft eingeführt wird und einen darüber ausgebildeten, von Begrenzungswänden begrenzten Feuerraum, in den mittels Düsen, die zumindest in der vorderen und hinteren Begrenzungswand angeordnet sind, Sekundärluft eingeblasen wird. Die Erfindung bezieht sich auch auf eine Düse zur Durchführung des Verfahrens.The invention relates to a method for supplying secondary air into a firing system with a mechanical firing grate through which primary air is introduced and a firing chamber formed thereover and delimited by boundary walls, in which by means of nozzles which are arranged at least in the front and rear boundary walls. Secondary air is blown in. The invention also relates to a nozzle for performing the method.

Bei Feuerungsanlagen mit einer Zuführung von Sekundärluft mittels Düsen in den Feuerraum, wobei die Düsen vorzugsweise an der vorderen und der hinteren Wand angeordnet sind, tritt sehr häufig ein Anbacken von Brennstoffteilen in dem Bereich einer Begrenzungswand auf, der sich unterhalb einer gegenüberliegenden Sekundärluftdüse befindet, von der sie gegen die gegenüberliegende Wand geschleudert werden und dort haften bleiben, weil sich diese Brennstoffteile noch in glühendem und fließfähigem Zustand befinden. Diese Anbackungen sind nur sehr schwer entfernbar und erfordern eine Stillegung der gesamten Feuerungsanlage, was mit einem großen Ausfall verbunden ist. Bei Feuerungsanlagen mit einem Rückschubrost treten die Anbackungen an der hinteren Begrenzungswand auf, da ihr unterer Wandbereich bedingt durch die Feuerraumkonstruktion der Strahlwirkung der Sekundärluftdüse der vorderen Begrenzungswand ausgesetzt ist.In combustion plants with a supply of secondary air by means of nozzles into the combustion chamber, the nozzles preferably being arranged on the front and the rear wall, caking of fuel parts very often occurs in the region of a boundary wall which is located below an opposite secondary air nozzle which they are thrown against the opposite wall and stick there because these fuel parts are still in glowing and flowable condition. These cakes are very difficult to remove and require the entire firing system to be shut down, which is associated with a major failure. In firing systems with a sliding grate, the caking occurs on the rear boundary wall, since its lower wall area causes is exposed to the jet effect of the secondary air nozzle of the front boundary wall through the combustion chamber construction

Aufgabe der Erfindung ist es, die an einer Begrenzungswand oder mehreren Begrenzungswänden des Feuerraumes auftretenden Anbackungen zu vermeiden.The object of the invention is to avoid the caking occurring on a boundary wall or a plurality of boundary walls of the combustion chamber.

Diese Aufgabe wird durch die im Anspruch 1 angegebenen Maßnahmen gelöst.This object is achieved by the measures specified in claim 1.

Durch die Aufteilung der Sekundärluft in einen in den Feuerraum gerichteten Anteil und einen parallel zur Begrenzungswand gerichteten Teil wird durch letzteren ein Schleier an der Begrenzungswand ausgebildet, der in der Lage ist, einen Teil der Brennstoffteilchen abzufangen, so daß diese nicht an die Begrenzungswand gelangen können. Soweit dies nicht möglich ist, weil die Teilchen eine zu große kinetische Energie aufweisen, so wird doch zumindest eine so weitgehende Abkühlung dieser Brennstoffteilchen erreicht, daß sie nicht mehr an der Begrenzungswand haften bleiben. Mit dieser einfachen Maßnahme ist also ein ernsthaftes Problem gelöst worden, das bisher, wie bereits erläutert, schwerwiegende Folgen hatte.By dividing the secondary air into a portion directed into the combustion chamber and a portion directed parallel to the boundary wall, the latter forms a veil on the boundary wall which is able to trap some of the fuel particles so that they cannot reach the boundary wall . Insofar as this is not possible because the particles have too great a kinetic energy, this fuel particles are at least cooled to such an extent that they no longer adhere to the boundary wall. This simple measure has thus solved a serious problem which, as already explained, has had serious consequences so far.

Eine Düse zur Durchführung des Verfahrens ist dadurch gekennzeichnet, daß sie einen in Strömungsrichtung konisch sich verjüngenden Außenmantel , einen zylindrischen Innenmantel und einen die beiden Mäntel konzentrisch zueinander haltenden und miteinander fest verbindenden Flansch aufweist, den der Innenmantel durchsetzt und der einen den Außenmantel an seinem dem Flansch zugewandten Ende übersteigenden Durchmesser aufweist und daß der Außenmantel stirnseitig an dem Flansch befestigt ist und mindestens ein Umfangsbereich als stirnseitige Schlitzdüse zwischen dem Außenmantel und dem Flansch ausgebildet ist. Durch diese Ausbildung wird mit einfachen konstruktiven Mitteln eine gezielte und sichere Aufteilung der Sekundärluft in einen in den Feuerraum gerichteten Teil und einen weiteren Teil erreicht, der sich als Schleier parallel zur Begrenzungswand vor dieser erstreckt.A nozzle for carrying out the method is characterized in that it has an outer jacket which tapers conically in the direction of flow, a cylindrical inner jacket and a flange which holds the two jackets concentrically to one another and firmly connects one another, which the inner jacket penetrates and one which the outer jacket at its Flange facing end exceeding Has diameter and that the outer jacket is attached to the end face of the flange and at least one peripheral region is formed as an end slot nozzle between the outer jacket and the flange. With this construction, simple and constructive means achieve a targeted and safe division of the secondary air into a part directed into the combustion chamber and a further part which extends in front of the boundary wall as a veil parallel to it.

In den meisten Anwendungsfällen genügt es, wenn bei mehreren Schlitzdüsen diese einander gegenüberliegend, bei nur zwei Düsen, diese im oberen und unteren Umfangsbereich ausgebildet sind.In most applications, it is sufficient if, in the case of a plurality of slot nozzles, these are located opposite one another, and in the case of only two nozzles, these are formed in the upper and lower peripheral region.

Um eine sichere Aufteilung der Sekundärluft innerhalb der Düse in der Weise zu erzielen, daß der eine Teil senkrecht zur Begrenzungswand in den Feuerraum austritt und der andere Teil der Sekundärluft parallel zur Begrenzungswand verläuft, ist in weiterer Ausgestaltung der Erfindung der Innenmantel kürzer als der Außenmantel und weist eine Länge auf, die zwischen dem 3fachen und dem 6fachen seines Durchmesser liegt.In order to achieve a safe division of the secondary air within the nozzle in such a way that one part emerges perpendicular to the boundary wall into the combustion chamber and the other part of the secondary air runs parallel to the boundary wall, the inner jacket is shorter than the outer jacket and in a further embodiment of the invention has a length that is between 3 times and 6 times its diameter.

Um die Aufteilung der Sekundärluft innerhalb der Düse möglichst störungsfrei durchzuführen, ist in weiterer Ausgestaltung der Erfindung das im Inneren des Außenmantel gelegene Ende des Innenmantels als Schneide mit sich nach außen erweiterndem Innendurchmesser bei konstantem Außendurchmesser ausgebildet.In order to carry out the division of the secondary air within the nozzle as trouble-free as possible, in a further embodiment of the invention the end of the inner jacket located in the interior of the outer jacket is designed as a cutting edge with an inside diameter widening outwards with a constant outside diameter.

Die Erfindung wird nachstehend anhand eines in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert. In der Zeichnung zeigen:

Fig. 1 :
einen teilweisen Längsschnitt durch einen Feuerraum einer Feuerungsanlage;
Fig. 2 :
einen Längsschnitt durch eine erste Ausführungsform einer Sekundärluft-Düse;
Fig. 3 :
einen Schnitt nach der Linie III-III in Fig. 2;
Fig. 4 :
einen Längsschnitt durch eine zweite Ausführungsform einer Sekundärluft-Düse; und
Fig. 5 :
einen Schnitt nach der Linie V-V in Fig. 4.
The invention is based on one in the drawing illustrated embodiment explained in more detail. The drawing shows:
Fig. 1:
a partial longitudinal section through a furnace of a furnace;
Fig. 2:
a longitudinal section through a first embodiment of a secondary air nozzle;
Fig. 3:
a section along the line III-III in Fig. 2;
Fig. 4:
a longitudinal section through a second embodiment of a secondary air nozzle; and
Fig. 5:
a section along the line VV in Fig. 4th

In Fig. 1 ist in schematischer Form ein Ausschnitt aus einer Feuerungsanlage dargestellt, die einen Feuerrost 1 und einen Aufgabetisch 2 mit Aufgabekolben 3 aufweist, welche das durch eine Aufgabeschurre 4 aufgegebene Brennmaterial auf den Feuerungsrost schieben. Oberhalb des Feuerungsrostes ist in seinem ersten Teil der nach oben sich erstreckende Feuerraum 5 ausgebildet, der durch eine vordere Begrenzungswand 6, eine hintere Begrenzungswand 7 und Seitenwände 8 begrenzt ist. Dem auf dem Rost 1 liegenden Brenngut wird Primär-Verbrennungsluft von unten durch den Rost hindurch zugeführt. Da mit den aufsteigenden Gasen auch noch unverbrannte Teile mitgeführt werden, sind vorzugsweise im Bereich der vorderen Begrenzungswand 6 und im Bereich der hinteren Begrenzungswand 7 Sekundärluftdüsen 10 und 11 vorgesehen, die zusätzliche Verbrennungsluft in den Feuerraum einblasen um die unverbrannten Teile die nach oben in den Feuerraum aufsteigen, einer weiteren Verbrennung zu unterwerfen.In Fig. 1, a section of a firing system is shown in schematic form, which has a fire grate 1 and a feed table 2 with feed pistons 3, which push the fuel fed through a feed chute 4 onto the firing grate. Above the firing grate, the upwardly extending combustion chamber 5 is formed in its first part, which is bounded by a front boundary wall 6, a rear boundary wall 7 and side walls 8. The combustion material lying on the grate 1 is supplied with primary combustion air from below through the grate. Since unburned parts are also carried along with the rising gases, secondary air nozzles 10 and 11 are preferably provided in the area of the front boundary wall 6 and in the area of the rear boundary wall 7, which blow additional combustion air into the combustion chamber in order to keep the unburned parts upwards rise the firebox to subject it to further combustion.

Da es sich in der Vergangenheit gezeigt hat, daß durch die Düsen 10, die in dem Bereich der vorderen Begrenzungswand vorgesehen sind, die in den aufsteigenden Gasen vorhandenen unverbrannten Teile gegen die rückwärtige Begrenzungswand 7 geschleudert werden, wo sie haften bleiben, sind die Sekundärluft-Düsen 11 der hinteren Begrenzungswand so ausgebildet, daß diese Ablagerung durch eine spezielle Luftführung verhindert wird.Since it has been shown in the past that through the nozzles 10, which are provided in the region of the front boundary wall, the unburned parts present in the rising gases are thrown against the rear boundary wall 7, where they adhere, the secondary air Nozzles 11 of the rear boundary wall are designed so that this deposit is prevented by a special air duct.

Zu diesem Zweck ist die Sekundärluftdüse, wie sie in den Figuren 2 und 3 dargestellt ist, aus einem Außenmantel 12 und einem Innenmantel 13 aufgebaut, der einen Flansch 14 durchsetzt und mit diesem, z. B. durch Schweißen fest verbunden ist. Der Außenmantel 12 ist stirnseitig mit dem Flansch 14 verbunden und zwar durch Zwischenlegen zweier bogenförmiger Abstandshalter 16 und 17, die einerseits mit dem Flansch 14 und andererseits mit der Stirnseite des Außenmantels 12 fest verbunden sind, wodurch zwischen den beiden Abstandshaltern schlitzförmige Düsen 15 zwischen der Stirnseite des Außenmantels 12 und dem Flansch 14 verbleiben, aus denen Luft austreten kann, welche mittels einer nicht dargestellten und am Ende 19 des Außenmantels 12 anschließbare Zuführungsleitung zugeführt wird. Diese Luft wird durch den Innenmantel 13, der an seinem im Inneren des Außenmantel 12 gelegenen Ende eine Schneide 20 aufweist, in zwei Teile unterteilt, wobei der eine Teil der Sekundärluft innerhalb des Innenmantels 13 strömt und aus dem freien Ende 21 in den Feuerraum senkrecht zur Begrenzungswand 7 austritt, während der andere Teil der Luft zwischen der Außenfläche des Innenmantels 13 und der Innenfläche des Außenmantels 12 zu den schlitzförmigen Düsen 15 zwischen der Stirnseite des Außenmantels 12 und dem Flansch 14 strömt und dort im wesentlichen parallel zur hinteren Begrenzungswand 7 aus der insgesamt mit 11 bezeichneten Sekundärluftdüse ausströmt und sich als Schleier parallel zu der Begrenzungswand ausbreitet. Durch diese zwischen der Stirnseite des Außenmantels 12 und dem Flansch 14, der den Außendurchmesser des Außenflansches an dieser Stelle deutlich überragt, im wesentlichen parallel zur Begrenzungswand 7 austretende Luft, wird ein Anbacken von brennbaren Teilchen an der Begrenzungswand 7 des Feuerraumes vermieden.For this purpose, the secondary air nozzle, as shown in Figures 2 and 3, is constructed from an outer jacket 12 and an inner jacket 13 which passes through a flange 14 and with this, z. B. is firmly connected by welding. The outer jacket 12 is connected on the end face to the flange 14, namely by interposing two arc-shaped spacers 16 and 17, which are firmly connected on the one hand to the flange 14 and on the other hand to the end face of the outer case 12, as a result of which slot-shaped nozzles 15 between the end members of the outer casing 12 and the flange 14 remain, from which air can escape, which is supplied by means of a feed line (not shown) which can be connected to the end 19 of the outer casing 12. This air is divided into two parts by the inner jacket 13, which has a cutting edge 20 at its end located inside the outer jacket 12, one part of the secondary air flowing inside the inner jacket 13 and from the free end 21 into the combustion chamber perpendicular to Boundary wall 7 emerges while the other part of the air between the The outer surface of the inner shell 13 and the inner surface of the outer shell 12 flows to the slit-shaped nozzles 15 between the end face of the outer shell 12 and the flange 14 and flows out there essentially parallel to the rear boundary wall 7 from the secondary air nozzle, designated as 11, and acts as a veil parallel to it Boundary wall spreads out. Baking of combustible particles on the boundary wall 7 of the combustion chamber is avoided by this air emerging essentially parallel to the boundary wall 7 between the end face of the outer shell 12 and the flange 14, which projects significantly beyond the outer diameter of the outer flange at this point.

Die Sekundärluftdüse gemäß den Figuren 4 und 5 entspricht im wesentlichen derjenigen nach den Figuren 2 und 3, so daß übereinstimmende Teile mit den gleichen Bezugszahlen versehen sind. Der einzige Unterschied besteht darin, daß vier Abstandshalter 16, 16a, 17 und 17a zwischen dem Flansch 14 und dem Außenmantel 12 vorgesehen sind, so daß vier einander gegenüberliegende Düsen 15 entstehen.The secondary air nozzle according to FIGS. 4 and 5 essentially corresponds to that according to FIGS. 2 and 3, so that matching parts are provided with the same reference numbers. The only difference is that four spacers 16, 16a, 17 and 17a are provided between the flange 14 and the outer jacket 12, so that four opposing nozzles 15 are formed.

Claims (5)

Verfahren zum Zuführen von Sekundärluft in eine Feuerungsanlage mit einem mechanischen Feuerungsrost, durch den Primärluft eingeführt wird und einem darüber ausgebildeten, von Begrenzungswänden begrenzten Feuerraum, in den mittels Düsen, die zumindest in den vorderen und hinteren Begrenzungswänden angeordnet sind, Sekundärluft eingeblasen wird, dadurch gekennzeichnet, daß an mindestens einer Begrenzungswand die im Strahlbereich einer gegenüberliegenden Sekundärluftzuführung liegt, die Sekundärluft in einen in den Feuerraum gerichteten und einen parallel zur Begrenzungswand gerichteten Teil aufgeteilt wird.A method of supplying secondary air in a combustion plant with a mechanical grate, is introduced through the primary air and, in a trained about bounded by boundary walls of the combustion chamber in the, secondary air is blown by means of nozzles that are arranged at least in the front and rear boundary walls characterized that on at least one boundary wall which is in the jet region of an opposite secondary air supply, the secondary air is divided into a part directed into the combustion chamber and a part directed parallel to the boundary wall. Düse zur Durchführung des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, daß sie einen in Strömungsrichtung konisch sich verjüngenden Außenmantel (12) einen zylindrischen Innenmantel (13) und einen die beiden Mäntel konzentrisch zueinander haltenden und miteinander fest verbindenden Flansch (14) aufweist, den der Innenmantel (13) durchsetzt und der einen den Außenmantel (12) an seinem dem Flansch (14) zugewandten Ende übersteigenden Durchmesser aufweist und daß der Außenmantel (12) stirnseitig an dem Flansch (14) befestigt ist und mindestens ein Umfangbereich als stirnseitige Schlitzdüse (15) zwischen dem Außenmantel (12) und dem Flansch (14) ausgebildet ist.Nozzle for carrying out the method according to claim 1, characterized in that it has an outer jacket (12) which tapers conically in the direction of flow, a cylindrical inner jacket (13) and a flange (14) which holds the two jackets concentrically to one another and firmly connects them to one another Passes through the inner jacket (13) and which has a diameter exceeding the outer jacket (12) at its end facing the flange (14) and that the outer jacket (12) is attached to the flange (14) on the end face and at least one peripheral region is designed as an end slot nozzle (15) between the outer jacket (12) and the flange (14). Düse nach Anspruch 2, dadurch gekennzeichnet, daß bei mehreren Schlitzdüsen (15) diese einander gegenüberliegend, bei nur zwei Düsen, dieseim oberen und unteren Umfangsbereich des Außenmantels (12) ausgebildet sind.Nozzle according to Claim 2, characterized in that in the case of a plurality of slot nozzles (15), these are arranged opposite one another, in the case of only two nozzles, these are formed in the upper and lower peripheral region of the outer casing (12). Düse nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß der Innenmantel (13) kürzer als der Außenmantel (12) ist und eine Länge aufweist, die zwischen dem 3fach und dem 6fachen seines Durchmessers liegt.Nozzle according to claim 2 or 3, characterized in that the inner jacket (13) is shorter than the outer jacket (12) and has a length which is between 3 times and 6 times its diameter. Düse nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß das im Inneren des Außenmantels (12) gelegene Ende des Innenmantels (13) als Schneide (20) mit sich nach außen erweiterndem Innendurchmesser bei konstantem Außendurchmesser ausgebildet ist.Nozzle according to one of claims 2 to 4, characterized in that the end of the inner casing (13) located inside the outer mantle (12) is designed as a cutting edge (20) having outwardly widening inner diameter at a constant outer diameter.
EP91122012A 1991-01-24 1991-12-20 Nozzle for feeding secondary air Expired - Lifetime EP0496094B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4102072 1991-01-24
DE4102072A DE4102072A1 (en) 1991-01-24 1991-01-24 METHOD AND NOZZLE FOR SUPPLYING SECOND AIR

Publications (3)

Publication Number Publication Date
EP0496094A2 true EP0496094A2 (en) 1992-07-29
EP0496094A3 EP0496094A3 (en) 1992-12-23
EP0496094B1 EP0496094B1 (en) 1996-02-21

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EP91122012A Expired - Lifetime EP0496094B1 (en) 1991-01-24 1991-12-20 Nozzle for feeding secondary air

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US (1) US5174226A (en)
EP (1) EP0496094B1 (en)
JP (1) JPH0648086B2 (en)
AT (1) ATE134433T1 (en)
BR (1) BR9200194A (en)
CA (1) CA2058865C (en)
DE (2) DE4102072A1 (en)
DK (1) DK0496094T3 (en)
ES (1) ES2082916T3 (en)
TW (1) TW200558B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4232488C1 (en) * 1992-09-28 1993-12-23 Martin Umwelt & Energietech Second air nozzle for furnaces
US5564632A (en) * 1994-12-27 1996-10-15 Combustion Engineering, Inc. Secondary air nozzle and starting burner furnace apparatus
DE19843991C2 (en) * 1998-09-25 2002-08-14 Juenger & Graeter Gmbh Feuerfe Zünddeckennase
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Also Published As

Publication number Publication date
ES2082916T3 (en) 1996-04-01
EP0496094B1 (en) 1996-02-21
DE4102072C2 (en) 1993-02-04
DE59107430D1 (en) 1996-03-28
CA2058865C (en) 1995-09-26
JPH0648086B2 (en) 1994-06-22
DK0496094T3 (en) 1996-07-08
BR9200194A (en) 1992-10-06
DE4102072A1 (en) 1992-07-30
US5174226A (en) 1992-12-29
JPH055517A (en) 1993-01-14
EP0496094A3 (en) 1992-12-23
ATE134433T1 (en) 1996-03-15
TW200558B (en) 1993-02-21

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