EP0496094B1 - Nozzle for feeding secondary air - Google Patents
Nozzle for feeding secondary air Download PDFInfo
- Publication number
- EP0496094B1 EP0496094B1 EP91122012A EP91122012A EP0496094B1 EP 0496094 B1 EP0496094 B1 EP 0496094B1 EP 91122012 A EP91122012 A EP 91122012A EP 91122012 A EP91122012 A EP 91122012A EP 0496094 B1 EP0496094 B1 EP 0496094B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flange
- outer casing
- nozzle
- air
- casing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000002485 combustion reaction Methods 0.000 claims abstract description 16
- 238000010304 firing Methods 0.000 description 9
- 239000000446 fuel Substances 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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 nozzle for supplying secondary air into a firing system with a mechanical firing grate through which primary air can be introduced and a firing chamber formed thereover and delimited by boundary walls, in which secondary air is arranged by means of nozzles which are arranged at least in the front and rear boundary walls can be blown in, the nozzle having an inner jacket and an outer jacket held concentrically therewith and the inner jacket being connected to a flange which has a diameter exceeding the outer jacket and for deflecting the air flowing between the inner and outer jacket perpendicular to that exiting from the inner jacket Air serves.
- a ring with star-shaped webs is provided in the outer jacket for holding the inner jacket, the front edges of which, seen in the flow direction, are flush with the front edge of the inner jacket.
- This not only requires additional design effort, but the radially arranged webs also impair the air flow into the outer annular duct and thus make it difficult to calculate the air quantities flowing in both air ducts exactly.
- the annular channel on the outer circumference of the inner jacket has a substantially constant thickness over its entire length and is deflected in a gentle arc by the flange connected to the inner jacket in a direction perpendicular to the outflow direction of the air flowing in the inner jacket.
- the object of the invention is to provide a nozzle for supplying secondary air to a firing system, with the aid of which caking on the combustion chamber wall in the region of the nozzle is effectively prevented, with an exact, predictable division of the air streams into a central core jet and an outer ring jet being ensured should.
- the outer jacket is conically tapered over the entire length in the direction of flow of the air, that the inner jacket penetrates the flange designed as a baffle plate and the opposite end of the inner jacket located inside the outer jacket as Cutting edge is formed with an outwardly widening inner diameter at a constant outer diameter, and that the outer jacket is attached to the end face of the flange and at least a peripheral region is formed as an end slot nozzle between the outer jacket and the flange.
- the conical tapering of the outer jacket greatly accelerates the flow between the two jackets in the direction of the outlet end, and by fastening the outer jacket to the flange at the front while leaving the outlet slots, the flange acts as a baffle plate, resulting in strong turbulence in the emerging outer jet leads to an effective prevention of caking on the combustion chamber wall even with smaller amounts of air.
- the inner end of the inner jacket is designed as a cutting edge with an inner diameter that widens outwards, an exact turbulence-free division into a central core jet and an outer ring jet is achieved, which is of great importance for the calculation of the emerging air quantities.
- This turbulence-free inner core jet is not impaired by the flange either, because the inner jacket penetrates this flange, that is, it projects beyond it, so that the flange cannot impair the core jet.
- the inner jacket is shorter than the outer jacket and has a length that is between three times and six times its 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 around the unburned parts which go up into rise the firebox to subject it to further combustion.
- the secondary air Nozzles 11 of the rear boundary wall are designed so that this deposition 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, for. B. is firmly connected by welding.
- the outer jacket 12 is connected on the end face to the flange 14 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 front side of the outer jacket 12, as a result of which slot-shaped nozzles 15 are located between the two spacers between the front side 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 located at the inside of 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 the Boundary wall 7 emerges while the other part of the air between 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 there flows out 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. 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 shell 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.
Landscapes
- 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)
- Jet Pumps And Other Pumps (AREA)
- Catching Or Destruction (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Nozzles (AREA)
Abstract
Description
Die Erfindung bezieht sich auf eine Düse zum Zuführen von Sekundärluft in eine Feuerungsanlage mit einem mechanischen Feuerungsrost, durch den Primärluft einführbar ist und einem darüber ausgebildeten, von Begrenzungswänden begrenzten Feuerraum, in den mittels Düsen die zumindest in der vorderen und hinteren Begrenzungswand angeordnet sind, Sekundärluft einblasbar ist, wobei die Düse einen Innenmantel und einen konzentrisch hierzu gehaltenen Außenmantel aufweist und der Innenmantel mit einem Flansch in Verbindung steht, der einen den Außenmantel übersteigenden Durchmesser aufweist und zur Umlenkung der zwischen Innen- und Außenmantel strömenden Luft senkrecht zu der aus dem Innenmantel austretenden Luft dient.The invention relates to a nozzle for supplying secondary air into a firing system with a mechanical firing grate through which primary air can be introduced and a firing chamber formed thereover and delimited by boundary walls, in which secondary air is arranged by means of nozzles which are arranged at least in the front and rear boundary walls can be blown in, the nozzle having an inner jacket and an outer jacket held concentrically therewith and the inner jacket being connected to a flange which has a diameter exceeding the outer jacket and for deflecting the air flowing between the inner and outer jacket perpendicular to that exiting from the inner jacket Air serves.
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 firing systems with a supply of secondary air by means of nozzles into the combustion chamber, the nozzles preferably being arranged on the front and rear walls, fuel parts caking very frequently 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 glowing and flowable. These cakes are very difficult to remove and require the entire furnace 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 is exposed to the radiation effect of the secondary air nozzle of the front boundary wall due to the construction of the combustion chamber.
Eine Düse der eingangs erläuterten Art zur Behebung der vorstehend erläuterten Probleme ist aus der US-PS 2,956,527 bekannt.A nozzle of the type described at the outset for eliminating the problems explained above is known from US Pat. No. 2,956,527.
Bei der bekannten Düse ist im Außenmantel ein Ring mit sternförmigen Stegen zur Halterung des Innenmantels vorgesehen, deren in Strömungsrichtung gesehen vordere Kanten mit der Vorderkante des Innenmantels bündig abschließen. Hierdurch ist nicht nur ein zusätzlicher konstruktiver Aufwand notwendig, sondern die radial angeordneten Stege beeinträchtigen auch die Luftströmung in den äußeren Ringkanal und erschweren somit eine exakte Berechnung der in beiden Luftkanälen strömenden Luftmengen. Der Ringkanal am Außenumfang des Innenmantels weist über seine gesamte Länge im wesentlichen eine konstante Dicke auf und wird durch den mit dem Innenmantel verbundenen Flansch im sanften Bogen in eine Richtung umgelenkt, die senkrecht zur Ausströmrichtung der im Innenmantel strömenden Luft steht. Hieraus ergibt sich eine im wesentlichen laminare Strömung entlang der Feuerraumwand, die nur bei sehr großen Luftmenge in der Lage ist Anbackungen zu verhindern. Bei der bekannten Düse ist zwar das innengelegene Ende des Innenmantels verjüngt, aber im wesentlichen stumpf ausgeführt, so daß eine exakte vorausberechenbare Aufteilung der Luftmengen auf den inneren Kernstrahl und den äußeren Ringstrahl nachteilig beeinflußt wird.In the known nozzle, a ring with star-shaped webs is provided in the outer jacket for holding the inner jacket, the front edges of which, seen in the flow direction, are flush with the front edge of the inner jacket. This not only requires additional design effort, but the radially arranged webs also impair the air flow into the outer annular duct and thus make it difficult to calculate the air quantities flowing in both air ducts exactly. The annular channel on the outer circumference of the inner jacket has a substantially constant thickness over its entire length and is deflected in a gentle arc by the flange connected to the inner jacket in a direction perpendicular to the outflow direction of the air flowing in the inner jacket. This results in an essentially laminar flow along the combustion chamber wall, which is only able to prevent caking with a very large amount of air. In the known nozzle, the inner end of the inner jacket is tapered, but is made essentially blunt, so that an exact, predictable distribution of the air quantities between the inner core jet and the outer ring jet is adversely affected.
Aufgabe der Erfindung ist es, eine Düse zum Zuführen von Sekundärluft in eine Feuerungsanlage zu schaffen, mit deren Hilfe Anbackungen an der Feuerraumwand im Bereich der Düse wirksam verhindert werden, wobei eine exakte vorausberechenbare Aufteilung der Luftströme in einen zentralen Kernstrahl und einen äußeren Ringstrahl gewährleistet sein soll.The object of the invention is to provide a nozzle for supplying secondary air to a firing system, with the aid of which caking on the combustion chamber wall in the region of the nozzle is effectively prevented, with an exact, predictable division of the air streams into a central core jet and an outer ring jet being ensured should.
Diese Aufgabe wird ausgehend von der eingangs erläuterten Düse erfindungsgemäß dadurch gelöst, daß der Außenmantel in Strömungsrichtung der Luft über die gesamte Länge konisch verjüngt ist, daß der Innenmantel den als Prallplatte ausgebildeten Flansch durchsetzt und das gegenüberliegende, im Inneren des Außenmantels gelegene Ende des Innenmantels als Schneide mit sich nach außen erweiterndem Innendurchmesser bei konstantem Außendurchmesser ausgebildet ist, 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.This object is achieved, starting from the nozzle explained at the outset, in that the outer jacket is conically tapered over the entire length in the direction of flow of the air, that the inner jacket penetrates the flange designed as a baffle plate and the opposite end of the inner jacket located inside the outer jacket as Cutting edge is formed with an outwardly widening inner diameter at a constant outer diameter, and that the outer jacket is attached to the end face of the flange and at least a peripheral region is formed as an end slot nozzle between the outer jacket and the flange.
Durch die konische Verjüngung des Außenmantels wird die Strömung zwischen den beiden Mänteln in Richtung auf das Austrittsende stark beschleunigt und durch die stirnseitige Befestigung des Außenmantels am Flansch unter Belassung von Austrittsschlitzen wirkt der Flansch als Prallplatte, wodurch sich eine starke Turbulenz im austretenden Außenstrahl ergibt, die auch bei geringeren Luftmengen zu einer wirksamen Verhinderung von Anbackungen an der Feuerraumwand führt. Da das innen gelegene Ende des Innenmantels als Schneide mit sich nach außen erweiterndem Innendurchmesser ausgebildet ist, wird eine exakte turbulenzfreie Aufteilung in einem zentralen Kernstrahl und einem äußeren Ringstrahl erreicht, was für die Berechnung der austretenden Luftmengen von großer Bedeutung ist. Dieser turbulenzfreie innere Kernstrahl wird auch durch den Flansch nicht beeinträchtigt, weil der Innenmantel diesen Flansch durchdringt, also über ihn hinausragt, wodurch eine Beeinträchtigung des Kernstrahles durch den Flansch nicht eintreten kann.The conical tapering of the outer jacket greatly accelerates the flow between the two jackets in the direction of the outlet end, and by fastening the outer jacket to the flange at the front while leaving the outlet slots, the flange acts as a baffle plate, resulting in strong turbulence in the emerging outer jet leads to an effective prevention of caking on the combustion chamber wall even with smaller amounts of air. Since the inner end of the inner jacket is designed as a cutting edge with an inner diameter that widens outwards, an exact turbulence-free division into a central core jet and an outer ring jet is achieved, which is of great importance for the calculation of the emerging air quantities. This turbulence-free inner core jet is not impaired by the flange either, because the inner jacket penetrates this flange, that is, it projects beyond it, so that the flange cannot impair the core jet.
In den meisten Anwendungsfällen genügt es, wenn bei mehreren Schlitzdüsen diese einander gegenüberliegen, bei nur zwei Schlitzdüsen diese im oberen und unteren Umfangsbereich des Außenmantels ausgebildet sind.In most applications, it is sufficient if, in the case of a plurality of slot nozzles, these are opposite one another, and in the case of only two slot nozzles, these are formed in the upper and lower peripheral region of the outer jacket.
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 dreifachen und dem sechsfachen seines Durchmessers liegt.In order to achieve a safe division of the secondary air within the nozzle in such a way that one part emerges perpendicularly 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 has a length that is between three times and six times its 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.
- 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
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
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 Außenmantels 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
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
Claims (3)
- Nozzle for feeding secondary air into a furnace comprising a mechanical grate (1) through which primary air can be introduced and a combustion chamber arranged above it and delimited by boundary walls into which secondary air can be injected by means of nozzles (10, 11) arranged at least in the front and rear boundary walls (6, 7), the nozzle (10) having an inner casing (13) and an outer casing (12) held concentrically thereto by means of a flange and the inner casing (13) being connected to the flange (14) which has a larger diameter than the outer casing (12) and serves to guide the air flowing between the inner and outer casings perpendicularly to the air emerging from the inner casing (13), the outer casing (12) tapering over its entire length in the flow direction of the air, the inner casing (13) traversing the flange (14) designed as an impact plate and the opposite end of the inner casing located in the interior of the outer casing being designed as a cutting (20) with an internal diameter increasing towards the outside and a constant external diameter, and the outer casing (12) being secured at its end face to the flange (14) and at least one circumferential region being designed as an end slot-type nozzle (15) between the outer casing (12) and the flange (14).
- Nozzle according to claim 1, characterised in that, in the case of a plurality of slot-type nozzles (15), they are situated opposite one another, and, in the case of only two slot-type nozzles, they are arranged in the upper and lower circumferential regions of the outer casing (12).
- Nozzle according to claim 1 or claim 2, characterised in that the inner casing (13) is shorter than the outer casing (12) and has a length which is between 3 times and 6 times its diameter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4102072A DE4102072A1 (en) | 1991-01-24 | 1991-01-24 | METHOD AND NOZZLE FOR SUPPLYING SECOND AIR |
| DE4102072 | 1991-01-24 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0496094A2 EP0496094A2 (en) | 1992-07-29 |
| EP0496094A3 EP0496094A3 (en) | 1992-12-23 |
| EP0496094B1 true EP0496094B1 (en) | 1996-02-21 |
Family
ID=6423629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91122012A Expired - Lifetime EP0496094B1 (en) | 1991-01-24 | 1991-12-20 | Nozzle for feeding secondary air |
Country Status (10)
| Country | Link |
|---|---|
| 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) |
Families Citing this family (6)
| 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 |
| US20100263654A1 (en) * | 2006-10-06 | 2010-10-21 | Cusack William E | Outdoor Cooker |
| US8864491B1 (en) * | 2007-12-12 | 2014-10-21 | Precision Combustion, Inc. | Direct injection method and apparatus for low NOx combustion of high hydrogen fuels |
| DE102013017427A1 (en) | 2013-10-19 | 2015-04-23 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Pressure recovery device and motor vehicle |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2956527A (en) * | 1955-07-07 | 1960-10-18 | Babcock & Wilcox Co | Combustion apparatus for ash containing fuel |
| US3955512A (en) * | 1973-11-30 | 1976-05-11 | Josef Martin Feuerungsbau Gmbh | Refuse incinerator |
| DE3038875C2 (en) * | 1980-10-15 | 1990-05-31 | Vereinigte Kesselwerke AG, 4000 Düsseldorf | Waste incineration plant |
| JPS5837415A (en) * | 1981-08-28 | 1983-03-04 | 株式会社 タクマ | Nox decreasing incinerator |
| CH665468A5 (en) * | 1983-05-20 | 1988-05-13 | Theodor Koch | METHOD FOR SECONDARY AIR SUPPLY, SECONDARY AIR INLET FOR PERFORMING THE METHOD AND APPLICATION OF THE METHOD. |
| US4917026A (en) * | 1989-03-28 | 1990-04-17 | Macmillan Bloedal Limited | Debris burner |
| FR2645625B1 (en) * | 1989-04-07 | 1994-05-27 | Otv D | PROCESS FOR THE TREATMENT OF HOUSEHOLD WASTE AND BOILER FOR THE IMPLEMENTATION OF THIS PROCESS |
-
1991
- 1991-01-24 DE DE4102072A patent/DE4102072A1/en active Granted
- 1991-12-20 DK DK91122012.7T patent/DK0496094T3/en active
- 1991-12-20 AT AT91122012T patent/ATE134433T1/en not_active IP Right Cessation
- 1991-12-20 ES ES91122012T patent/ES2082916T3/en not_active Expired - Lifetime
- 1991-12-20 EP EP91122012A patent/EP0496094B1/en not_active Expired - Lifetime
- 1991-12-20 DE DE59107430T patent/DE59107430D1/en not_active Expired - Fee Related
-
1992
- 1992-01-07 JP JP4000671A patent/JPH0648086B2/en not_active Expired - Fee Related
- 1992-01-07 CA CA002058865A patent/CA2058865C/en not_active Expired - Fee Related
- 1992-01-15 US US07/821,495 patent/US5174226A/en not_active Expired - Lifetime
- 1992-01-23 BR BR929200194A patent/BR9200194A/en not_active IP Right Cessation
- 1992-07-21 TW TW081105740A patent/TW200558B/zh active
Also Published As
| Publication number | Publication date |
|---|---|
| DK0496094T3 (en) | 1996-07-08 |
| JPH0648086B2 (en) | 1994-06-22 |
| EP0496094A2 (en) | 1992-07-29 |
| JPH055517A (en) | 1993-01-14 |
| TW200558B (en) | 1993-02-21 |
| DE4102072C2 (en) | 1993-02-04 |
| CA2058865C (en) | 1995-09-26 |
| ATE134433T1 (en) | 1996-03-15 |
| ES2082916T3 (en) | 1996-04-01 |
| DE59107430D1 (en) | 1996-03-28 |
| EP0496094A3 (en) | 1992-12-23 |
| DE4102072A1 (en) | 1992-07-30 |
| US5174226A (en) | 1992-12-29 |
| BR9200194A (en) | 1992-10-06 |
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