EP0798511B1 - Heating boiler and its method of operation - Google Patents
Heating boiler and its method of operation Download PDFInfo
- Publication number
- EP0798511B1 EP0798511B1 EP97104267A EP97104267A EP0798511B1 EP 0798511 B1 EP0798511 B1 EP 0798511B1 EP 97104267 A EP97104267 A EP 97104267A EP 97104267 A EP97104267 A EP 97104267A EP 0798511 B1 EP0798511 B1 EP 0798511B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- combustion chamber
- heating boiler
- axial
- exhaust gas
- secondary air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 238000000034 method Methods 0.000 title claims description 7
- 238000010438 heat treatment Methods 0.000 title claims 10
- 238000002485 combustion reaction Methods 0.000 claims abstract description 70
- 239000007789 gas Substances 0.000 claims description 18
- 239000004449 solid propellant Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 1
- 239000000446 fuel Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000003546 flue gas Substances 0.000 abstract description 29
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 22
- 238000000197 pyrolysis Methods 0.000 abstract description 5
- 238000002156 mixing Methods 0.000 description 7
- 239000003344 environmental pollutant Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000000779 smoke Substances 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B5/00—Combustion apparatus with arrangements for burning uncombusted material from primary combustion
- F23B5/04—Combustion apparatus with arrangements for burning uncombusted material from primary combustion in separate combustion chamber; on separate grate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B7/00—Combustion techniques; Other solid-fuel combustion apparatus
- F23B7/002—Combustion techniques; Other solid-fuel combustion apparatus characterised by gas flow arrangements
- F23B7/005—Combustion techniques; Other solid-fuel combustion apparatus characterised by gas flow arrangements with downdraught through fuel bed and grate
Definitions
- the invention relates to a method according to the Preamble of claim 1. Furthermore, the Invention a boiler according to the preamble of Claim 3.
- the flue gases can be particularly advantageous after their swirling in two essentially axial and parallel longitudinal flows through two essentially cylindrical, arranged downstream of the flue gas inlet Suck areas out of the combustion chamber.
- the device mentioned at the outset has the solution to task set the features of the invention characterizing part of claim 3.
- the flue gas duct forms a narrowest cross section, so to speak of the system in which a correspondingly high speed prevails. This leads - as in the case of known device - for a very good interference of Secondary air in the pyrolysis flue gases.
- the mixture occurs then radially into the combustion chamber and hits the opposite combustion chamber wall on the axial inner rib.
- the mixture flow divides and forms the two opposing longitudinal vertebrae, which are at their axial Hike through the entire combustion chamber mutually penetrate and thereby an extremely even and cause low-emission combustion.
- the flue gas duct as Axial slot opens into the combustion chamber. This will cause this End of the combustion chamber, which is closed in the axial direction is already having a certain axial length of the combustion chamber the mixture consisting of the flue gases and the secondary air acted upon, with a relatively thin, broadband gas flow, which is divided into broadband, splits even thinner longitudinal eddy currents. This too helps to make the combustion even.
- the secondary air duct to at least one side of the Axial slot runs essentially parallel to this and is connected to it by at least one slot nozzle.
- the secondary air preheated in this way is removed by the Slit nozzle into the flue gas duct at a relatively high speed sucked in at a point where in this also has a relatively high flow rate prevails. It happens before entering the combustion chamber So to a very good mixing, which is encouraged by it can be that the slot nozzle in the flow direction the smoke is inclined.
- edges of the axial slot are advantageously rounded inwards so that the opposite Vortex in the upper area towards the center of the combustion chamber are pressed downwards and thus in the area of the Combustion chamber center meet. This also promotes the mixing.
- the cross section of the combustion chamber at least in the range of Flue gas routing essentially circular or elliptical is trained. Especially with circular cross sections excellent results have been achieved. But also the elliptical shape leads to very good mixing.
- the axial inner rib advantageously extends essentially over the entire length of the combustion chamber, so that the opposite vortex formation up to the end of the combustion chamber stops.
- the Area of the combustion chamber assigned to the flue gas duct downstream connect two substantially cylindrical areas that on both sides of the plane defined by the axial inner rib run parallel to each other up to the end of the combustion chamber.
- the gas flow is thus within the combustion chamber divided into two parallel firing zones, in which the turbulence continues.
- the combustion chamber is preferably below the filling space arranged, the flue gas duct essentially runs vertically. In this way, a special one arises favorable design and a uniform gas flow in the Footwell of the filling room, especially if the flue gas duct starts from the center of the filling chamber floor.
- the boiler according to FIGS. 1 and 2 has a filling space 1 in which solid fuel 2 is pyrolyzed.
- a primary air duct 3 opens in the filling chamber 1 is only indicated schematically here.
- the combustion chamber 4 is over with the filling chamber 1 a flue gas duct 5 connected.
- the mouth of the flue gas duct 5 lies at the right end of the combustion chamber 4, at which this is closed.
- the smoke gases leave the Combustion chamber 4 at its left open end.
- the combustion chamber 4 is also supplied with secondary air via a secondary air duct 6, which is only schematic in FIG. 1 is shown, but results more clearly from FIG. 2.
- a suction fan 7 creates a vacuum in that Space in which the combustion chamber 4 opens. This leads to, that flue gases from the filling room 1 through the flue gas duct 5 are sucked into the combustion chamber 4. At the same time, primary air flows through the primary air duct 3 sucked through into the filling chamber 1. Secondary air sucked in through the secondary air duct 6.
- Fig. 2 shows that the secondary air duct 6 from two channels exists, the flue gas duct 5 parallel on both sides run to this, the flue gas guide 5 in this Area is designed as an axial slot.
- the connection of the Secondary air duct 6 with the flue gas duct 5 consists of Slot nozzles 8, which are inclined in the flow direction of the flue gas are. So it happens before entering the combustion chamber 4 for an intimate mixing of the flue gases with the secondary air.
- the flue gas guide 5 opens radially into the combustion chamber 4.
- the combustion chamber has an axial inner rib opposite it 9 on, which has a sharp-edged back and rounded merges into the combustion chamber wall.
- the interior of the Incidentally, the combustion chamber is circular.
- combustion chamber 4 essentially is elliptical, apart from the axial Inner rib 9 and that the edges 10 of the slot-shaped exhaust duct 5 rounded inwards are.
- the opposite longitudinal vortices are therefore in the upper Area more towards the center of the combustion chamber directed where there is a particularly intensive mixing is coming.
- combustion chamber 4 is only in that The area is elliptical, that of the flue gas duct 5 is assigned. Close to this area downstream two cylindrical areas 11 which the swirling Divide the flue gas flow into two partial flows. The latter run parallel to each other on both sides to that of the axial Inner rib 9 defined level.
- the combustion chamber is 4th arranged centrally below the filling space 1, since this too an inexpensive slim design and an even one Gas extraction leads from the filling room.
- the combustion chamber can also be located to the side of the filling chamber.
- the cross section of the combustion chamber can change over their length and also the axis of the Combustion chamber to incline limited to the horizontal.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Incineration Of Waste (AREA)
- Paper (AREA)
- Solid-Fuel Combustion (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren nach dem
Oberbegriff des Patentanspruchs 1. Ferner betrifft die
Erfindung einen Heizkessel nach dem Oberbegriff des
Patentanspruchs 3.The invention relates to a method according to the
Preamble of
Ein derartiges Verfahren und eine derartige Vorrichtung sind aus der EP-A- 0 563 499 bekannt. Das Saugzuggebläse sorgt dafür, daß die Primärluft in die Füllkammer gelangt, in der die Pyrolysierung stattfindet. Zur Erzielung einer möglichst schadstoffarmen Nachverbrennung werden die bei der Pyrolyse entstehenden Rauchgase zusammen mit der Sekundärluft in die dort halbzylindrische Brennkammer eingesaugt, und zwar unter Bildung der zwei geläufigen Längswirbel.Such a method and device are known from EP-A-0 563 499. The induced draft fan ensures that the primary air gets into the filling chamber, in which the pyrolysis takes place. To achieve a Afterburning with as few pollutants as possible Pyrolysis evolving flue gases together with the Secondary air into the semi-cylindrical combustion chamber there sucked in, forming the two common ones Longitudinal vertebrae.
Es wurde gefunden, daß die Nachverbrennung unter dem Gesichtspunkt der Schadstoffemmissionen verbesserungsfähig ist, und der Erfindung liegt die Aufgabe zugrunde, diese Verbesserung zu erzielen.It has been found that post-combustion from the point of view of pollutant emissions can be improved is, and the invention is based on the object To achieve improvement.
Zur Lösung dieser Aufgabe weist das eingangs genannte
Verfahren erfindungsgemäß die Merkmale des kennzeichnenden
Teils des Patentanspruchs 1 auf.To solve this problem, the above mentioned
Method according to the invention the characteristics of the characteristic
Part of
Das Einsaugen der Sekundärluft in die Rauchgase vor deren Eintritt in die Brennkammer bewirkt - wie auch im Falle des bekannten Verfahrens - bereits eine sehr innige Durchmischung, bevor die eigentliche Nachverbrennung beginnt. In der Brennkammer kommt es dann unter der Wirkung der axialen Innenrippe zu einer sehr intensiven Verwirbelung, da die beiden gegenläufigen Längswirbel ineinandergreifen und ineinander übergehen. Die Nachverbrennung erfolgt entsprechend gleichmäßig, und zwar über der gesamten Länge der Brennkammer, mit der Folge, daß die Schadstoffemmissionen minimiert werden.Sucking the secondary air into the flue gases before it Entry into the combustion chamber causes - as in the case of the known method - already a very intimate one Mixing before the actual afterburning begins. It then comes under the effect in the combustion chamber the axial inner rib to a very intense Swirling, since the two opposite longitudinal swirls interlock and merge. The afterburn takes place accordingly evenly, and above the entire length of the combustion chamber, with the result that the Pollutant emissions are minimized.
Dabei kann es besonders vorteilhaft sein, die Rauchgase nach ihrer Verwirbelung in zwei im wesentlichen axialen und parallelen Längsströmen durch zwei im wesentlichen zylindrische, stromab des Rauchgaseintritts angeordnete Bereiche hindurch aus der Brennkammer herauszusaugen.The flue gases can be particularly advantageous after their swirling in two essentially axial and parallel longitudinal flows through two essentially cylindrical, arranged downstream of the flue gas inlet Suck areas out of the combustion chamber.
Die eingangs genannte Vorrichtung weist zur Lösung der
gestellten Aufgabe erfindungsgemäß die Merkmale des
kennzeichnenden Teils des Patentanspruchs 3 auf.The device mentioned at the outset has the solution to
task set the features of the invention
characterizing part of
Die Rauchgasführung bildet sozusagen einen engsten Querschnitt des Systems, in dem eine entsprechend hohe Geschwindigkeit herrscht. Dies führt - wie auch im Falle der bekannten Vorrichtung - zu einer sehr guten Einmischung der Sekundärluft in die Pyrolyse-Rauchgase. Das Gemisch tritt sodann radial in die Brennkammer ein und trifft an der gegenüberliegenden Brennkammerwand auf die axiale Innenrippe. Hier teilt sich die Gemischströmung und bildet die beiden gegenläufigen Längswirbel, die sich bei ihrer axialen Wanderung durch die gesamte Brennkammer gegenseitig durchdringen und dadurch eine äußerst gleichmäßige und schadstoffarme Verbrennung bewirken.The flue gas duct forms a narrowest cross section, so to speak of the system in which a correspondingly high speed prevails. This leads - as in the case of known device - for a very good interference of Secondary air in the pyrolysis flue gases. The mixture occurs then radially into the combustion chamber and hits the opposite combustion chamber wall on the axial inner rib. Here the mixture flow divides and forms the two opposing longitudinal vertebrae, which are at their axial Hike through the entire combustion chamber mutually penetrate and thereby an extremely even and cause low-emission combustion.
Die Entstehung der gegenläufigen Längswirbel läßt sich dadurch fördern, daß die axiale Innenrippe einen scharfkantigen Rücken aufweist und gerundet in die Brennkammerwand übergeht. The emergence of the opposite longitudinal vortices can be promote that the axial inner rib has a sharp edge Back and rounded into the combustion chamber wall transforms.
Ferner ist es vorteilhaft, daß die Rauchgasführung als Axialschlitz in der Brennkammer mündet. Dadurch wird an diesem Ende der Brennkammer, das in Axialrichtung geschlossen ist, bereits eine gewisse axiale Länge der Brennkammer mit dem aus den Rauchgasen und der Sekundärluft bestehenden Gemisch beaufschlagt, und zwar mit einem relativ dünnen, breitbandigen Gasstrom, der sich in entsprechend breitbandige, noch dünnnere Längswirbelströme spaltet. Auch dies trägt dazu bei, die Verbrennung gleichmäßig zu gestalten.It is also advantageous that the flue gas duct as Axial slot opens into the combustion chamber. This will cause this End of the combustion chamber, which is closed in the axial direction is already having a certain axial length of the combustion chamber the mixture consisting of the flue gases and the secondary air acted upon, with a relatively thin, broadband gas flow, which is divided into broadband, splits even thinner longitudinal eddy currents. This too helps to make the combustion even.
Dabei besteht ein weiteres bevorzugtes Merkmal darin, daß die Sekundärluftführung mindestens zu einer Seite des Axialschlitzes im wesentlichen parallel zu diesem verläuft und durch mindestens eine Schlitzdüse mit ihm verbunden ist. Die auf diese Weise vorgewärmte Sekundärluft wird durch die Schlitzdüse mit relativ hoher Geschwindigkeit in die Rauchgasführung eingesaugt, und zwar an einer Stelle, an der in dieser ebenfalls eine relativ hohe Strömungsgeschwindigkeit herrscht. Bereits vor Eintritt in die Brennkammer kommt es also zu einer sehr guten Durchmischung, die noch dadurch gefördert werden kann, daß die Schlitzdüse in Strömungsrichtung der Rauchgase geneigt ist.Another preferred feature is that the secondary air duct to at least one side of the Axial slot runs essentially parallel to this and is connected to it by at least one slot nozzle. The secondary air preheated in this way is removed by the Slit nozzle into the flue gas duct at a relatively high speed sucked in at a point where in this also has a relatively high flow rate prevails. It happens before entering the combustion chamber So to a very good mixing, which is encouraged by it can be that the slot nozzle in the flow direction the smoke is inclined.
Vorteilhafterweise sind die Ränder des Axialschlitzes gerundet nach innen eingezogen, so daß die gegenläufigen Wirbel im oberen Bereich gegen das Zentrum der Brennkammer hin nach unten gedrückt werden und somit im Bereich des Brennkammerzentrums aufeinandertreffen. Auch dies fördert die Durchmischung.The edges of the axial slot are advantageously rounded inwards so that the opposite Vortex in the upper area towards the center of the combustion chamber are pressed downwards and thus in the area of the Combustion chamber center meet. This also promotes the mixing.
In Weiterbildung der Erfindung wird vorgeschlagen, daß der Querschnitt der Brennkammer mindestens im Bereich der Rauchgasführung im wesentlichen kreisförmig oder elliptisch ausgebildet ist. Besonders mit kreisförmigen Querschnitten wurden hervorragende Ergebnisse erzielt. Aber auch die elliptische Form führt zu einer sehr guten Durchmischung.In a development of the invention it is proposed that the cross section of the combustion chamber at least in the range of Flue gas routing essentially circular or elliptical is trained. Especially with circular cross sections excellent results have been achieved. But also the elliptical shape leads to very good mixing.
Die axiale Innenrippe erstreckt sich vorteilhafterweise im wesentlichen über die gesamte Länge der Brennkammer, so daß die gegenläufige Wirbelbildung bis zum Ende der Brennkammer anhält.The axial inner rib advantageously extends essentially over the entire length of the combustion chamber, so that the opposite vortex formation up to the end of the combustion chamber stops.
Alternativ dazu besteht die ebenfalls vorteilhafte Möglichkeit, daß sich an den im wesentlichen elliptischen, der Rauchgasführung zugeordneten Bereich der Brennkammer stromab zwei im wesentlichen zylindrische Bereiche anschließen, die beidseitig der von der axialen Innenrippe definierten Ebene parallel zueinander bis zum Ende der Brennkammer verlaufen. Die Gasströmung wird also innerhalb der Brennkammer nach ihrer Durchmischung in zwei parallele Brennzonen aufgeteilt, in denen sich die Verwirbelung fortsetzt.Alternatively, there is the also advantageous possibility of that the essentially elliptical, the Area of the combustion chamber assigned to the flue gas duct downstream connect two substantially cylindrical areas that on both sides of the plane defined by the axial inner rib run parallel to each other up to the end of the combustion chamber. The gas flow is thus within the combustion chamber divided into two parallel firing zones, in which the turbulence continues.
Vorzugsweise ist die Brennkammer unterhalb des Füllraumes angeordnet, wobei die Rauchgasführung im wesentlichen vertikal verläuft. Auf diese Weise ergibt sich eine besonders günstige Bauform und eine gleichmäßige Gasströmung im Fußraum des Füllraums, insbesondere wenn die Rauchgasführung vom Zentrum des Füllraumbodens ausgeht.The combustion chamber is preferably below the filling space arranged, the flue gas duct essentially runs vertically. In this way, a special one arises favorable design and a uniform gas flow in the Footwell of the filling room, especially if the flue gas duct starts from the center of the filling chamber floor.
Die Erfindung wird im folgenden anhand bevorzugter Ausführungsbeispiele im Zusammenhang mit der beiliegenden Zeichnung näher erläutert. Die Zeichnung zeigt in:
- Fig. 1
- einen Vertikalschnitt durch einen Heizkessel;
- Fig. 2
- einen Teilschnitt entlang der Linie II-II in Fig. 1;
- Fig. 3
- eine abgewandelte Ausführungsform in einer Darstellung nach Fig. 2;
- Fig. 4
- eine weitere abgewandelte Ausführungsform in einer Darstellung nach Fig. 2.
- Fig. 1
- a vertical section through a boiler;
- Fig. 2
- a partial section along the line II-II in Fig. 1;
- Fig. 3
- a modified embodiment in a representation of FIG. 2;
- Fig. 4
- a further modified embodiment in a representation according to FIG. 2.
Der Heizkessel nach den Fig. 1 und 2 weist einen Füllraum
1 auf, in welchem fester Brennstoff 2 pyrolysiert wird.
Hierzu mündet im Füllraum 1 eine Primärluftführung 3, die
hier nur schematisch angedeutet ist. Unterhalb des Füllraum
befindet sich eine langgestreckte Brennkammer 4 mit horizontaler
Achse. Die Brennkammer 4 ist mit dem Füllraum 1 über
eine Rauchgasführung 5 verbunden. Die Mündung der Rauchgasführung
5 liegt am rechten Ende der Brennkammer 4, an welchem
diese geschlossen ist. Die Rauchgase verlassen die
Brennkammer 4 an deren linkem offenem Ende. Die Brennkammer
4 wird außerdem mit Sekundärluft versorgt, und zwar über
eine Sekundärluftführung 6, die in Fig. 1 nur schematisch
dargestellt ist, sich aber deutlicher aus Fig. 2 ergibt.The boiler according to FIGS. 1 and 2 has a
Ein Saugzuggebläse 7 erzeugt einen Unterdruck in demjenigen
Raum, in dem die Brennkammer 4 mündet. Dies führt dazu,
daß Rauchgase aus dem Füllraum 1 durch die Rauchgasführung
5 hindurch in die Brennkammer 4 eingesaugt werden.
Gleichzeitig wird Primärluft durch die Primärluftführung 3
hindurch in den Füllraum 1 eingesaugt. Ferner wird Sekundärluft
durch die Sekundärluftführung 6 angesaugt.A
Fig. 2 zeigt, daß die Sekundärluftführung 6 aus zwei Kanälen
besteht, die beidseitig der Rauchgasführung 5 parallel
zu dieser verlaufen, wobei die Rauchgasführung 5 in diesem
Bereich als Axialschlitz ausgebildet ist. Die Verbindung der
Sekundärluftführung 6 mit der Rauchgasführung 5 besteht aus
Schlitzdüsen 8, die in Strömungsrichtung des Rauchgases geneigt
sind. Vor Eintritt in die Brennkammer 4 kommt es also
zu einer innigen Durchmischung der Rauchgase mit der Sekundärluft.Fig. 2 shows that the
Die Rauchgasführung 5 mündet radial in der Brennkammer
4. Ihr gegenüber weist die Brennkammer eine axiale Innenrippe
9 auf, die einen scharfkantigen Rücken besitzt und gerundet
in die Brennkammerwand übergeht. Der Innenraum der
Brennkammer ist im übrigen kreisförmig ausgebildet.The
Wenn das mit der Sekundärluft gemischte Rauchgas am Ort der axialen Innenrippe auf die Brennkammerwand auftritt, teilt es sich in zwei gegenläufige Längswirbel, wie dies in Fig. 2 durch Pfeile angedeutet ist. Diese Art der Strömungsführung bewirkt eine sehr intensive Durchmischung und Verwirbelung, woraus eine sehr gleichmäßige und dementsprechend schadstoffarme Nachverbrennung resultiert.If the flue gas mixed with the secondary air is on site the axial inner rib occurs on the combustion chamber wall, divides it into two opposite longitudinal vortices, like this in Fig. 2 is indicated by arrows. This type of flow control causes a very intensive mixing and swirling, resulting in a very even and accordingly Low-emission afterburning results.
Die Ausführungsform nach Fig. 3 unterscheidet sich von
der nach Fig. 2 dadurch, daß die Brennkammer 4 im wesentlichen
elliptisch ausgebildet ist, abgesehen von der axialen
Innenrippe 9 und abgesehen davon, daß die Ränder 10 der
schlitzförmigen Abgasführung 5 gerundet nach innen eingezogen
sind. Die gegenläufigen Längswirbel werden also im oberen
Bereich stärker in Richtung auf das Zentrum der Brennkammer
gelenkt, wo es zu einer besonders intensiven Durchmischung
kommt.3 differs from
2 in that the
Gemeinsam ist den Ausführungen nach den Fig. 2 und 3,
daß sich die axialen Innenrippen 9 über die gesamte Länge
der Brennkammer erstrecken.Common to the explanations according to FIGS. 2 and 3,
that the axial
Dies ist bei der Ausführungsform nach Fig. 4 nicht der
Fall. Vielmehr ist hier die Brennkammer 4 lediglich in demjenigen
Bereich elliptisch ausgebildet, der der Rauchgasführung
5 zugeordnet ist. An diesen Bereich schließen sich
stromab zwei zylindrische Bereiche 11 an, die den wirbelnden
Rauchgasstrom in zwei Teilströme unterteilen. Letztere verlaufen
parallel zueinander beidseitig zu der von der axialen
Innenrippe 9 definierten Ebene.In the embodiment according to FIG. 4, this is not the case
Case. Rather, the
Bei allen Ausführungsbeispielen ist die Brennkammer 4
zentral unterhalb des Füllraums 1 angeordnet, da dies zu
einer günstigen schmalen Bauform und zu einer gleichmäßigen
Gasabsaugung aus dem Füllraum führt.In all exemplary embodiments, the combustion chamber is 4th
arranged centrally below the filling
Hingegen sind durchaus Abwandlungsmöglichkeiten gegeben. So kann die Brennkammer auch seitlich zum Füllraum liegen. Ferner besteht die Möglichkeit, den Querschnitt der Brennkamer über deren Länge zu verändern und auch die Achse der Brennkammer gegenüber der Horizontalen begrenzt zu neigen. Außerdem kommen abweichende Querschnittsformen der Brennkammer in Frage, beispielsweise vieleckige Polygone, wenn sich auch insbesondere die Kreisform besonders bewährt hat.On the other hand, there are possibilities for modification. The combustion chamber can also be located to the side of the filling chamber. There is also the possibility of the cross section of the combustion chamber to change over their length and also the axis of the Combustion chamber to incline limited to the horizontal. There are also different cross-sectional shapes of the combustion chamber into question, for example polygonal polygons if the circular shape in particular has also proven its worth.
Claims (10)
- Method of operating a heating boiler in whichsolid fuel is pyrolised with the addition of primary air,the resulting exhaust gases are drawn, whilst swirling, through an elongate, substantially horizontal combustion chamber by the addition of secondary air, the secondary air is added to the exhaust gases before entry into the combustion chamber andtwo longitudinal swirls of opposite sense and with substantially parallel axes are produced in the combustion chamber,characterised in that the production of the longitudinal swirls is promoted by an axial, longitudinal rib, which is disposed on the internal surface of the combustion chamber opposite to the exhaust gas inlet, andthat the exhaust gases are introduced at one end of the combustion chamber and are exhausted at the other end so that they flow axially through the entire combustion chamber.
- Method as claimed in claim 1, characterised in that after the exhaust gases have swirled in two substantially axial and parallel longitudinal flows through two substantially cylindrical regions disposed downstream of the exhaust gas inlet, they are exhausted from the combustion chamber.
- Heating boiler for burning solid fuels includinga filling space (1) for pyrolising the fuels,a primary air line (3) discharging into the filling space,an elongate combustion chamber (4) with a substantially horizontal axis,an exhaust gas line (5), which connects the lower end of the filling space (1) with the combustion chamber (4),a suction fan (7) communicating with one end of the combustion chamber (4) anda secondary air line (6) supplying the combustion chamber (4),whereby the secondary air line (6) discharges into the exhaust gas line (5) and the latter discharges radially into the combustion chamber (4),characterised in that the combustion chamber (4) has an axial internal rib (9) opposite to the exhaust gas line (5) andthat the exhaust gas line (5) discharges into the combustion chamber (4) at that end which is opposed to the end connected to the suction fan (7), so that there is an axial flow through the entire combustion chamber.
- Heating boiler as claimed in claim 3, characterised in that the axial internal rib (9) has a sharp edged ridge and merges into the combustion chamber wall in a radiussed fashion.
- Heating boiler as claimed in claim 3 or 4, characterised in that the exhaust gas line (5) discharges into the combustion chamber (4) in the form of an axial slot.
- Heating boiler as claimed in claim 5, characterised in that the secondary air line (6) extends on at least one side of the axial slot and substantially parallel to it and is connected with it by means of at least one nozzle slot (8).
- Heating boiler as claimed in claim 5 or 6, characterised in that the nozzle slot (8) is inclined in the flow direction of the exhaust gases.
- Heating boiler as claimed in one of claims 5 to 7, characterised in that the edges (10) of the axial slot are rounded and set back inwardly.
- Heating boiler as claimed in one of claims 3 to 8, characterised in that the cross-sectional area of the combustion chamber (4) is substantially circular or elliptical, at least in the vicinity of the exhaust gas line (5).
- Heating boiler as claimed in one of claims 3 to 9, characterised in that the axial internal rib (9) extends substantially over the entire length of the combustion chamber (4).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19612045 | 1996-03-27 | ||
| DE19612045A DE19612045A1 (en) | 1996-03-27 | 1996-03-27 | Boiler and process for its operation |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0798511A2 EP0798511A2 (en) | 1997-10-01 |
| EP0798511A3 EP0798511A3 (en) | 1998-08-12 |
| EP0798511B1 true EP0798511B1 (en) | 2001-05-30 |
Family
ID=7789541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97104267A Expired - Lifetime EP0798511B1 (en) | 1996-03-27 | 1997-03-13 | Heating boiler and its method of operation |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0798511B1 (en) |
| AT (1) | ATE201759T1 (en) |
| DE (1) | DE19612045A1 (en) |
| DK (1) | DK0798511T3 (en) |
| NO (1) | NO308754B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7498102B2 (en) | 2002-03-22 | 2009-03-03 | Bookeun Oh | Nonaqueous liquid electrolyte |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT410254B (en) * | 2000-09-01 | 2003-03-25 | Froeling Heizkessel Und Behael | COMBUSTION CHAMBER FOR A BOILER HEATABLE WITH SOLID FUELS |
| DE102006009335A1 (en) * | 2006-03-01 | 2007-09-06 | Viessmann Werke Gmbh & Co Kg | Heating boilers, in particular for solid biomass |
| EP1983258A3 (en) * | 2007-03-13 | 2010-03-31 | Central Boiler Inc. | Wood fired boiler |
| EP2615369B1 (en) * | 2012-01-16 | 2019-05-29 | Decona Holding B.V. | Heating device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE216131C (en) * | ||||
| DE3345202A1 (en) * | 1983-12-14 | 1985-06-20 | Franklin 8901 Kissing Schmidt | Apparatus for the reduction of the dew point temperature of exhaust gases |
| CH678652A5 (en) * | 1989-04-28 | 1991-10-15 | Heitzmann Ag | |
| AT400180B (en) * | 1990-01-10 | 1995-10-25 | Froeling Heizkessel Und Behael | SOLID FUEL HEATED UNDERBURNING BOILER |
| DE4007849C3 (en) * | 1990-03-12 | 1999-10-07 | Hermann Hofmann | Solid fuel furnace |
| EP0563499A1 (en) * | 1992-03-31 | 1993-10-06 | Liebi Lnc Ag | Wood gasification boiler |
-
1996
- 1996-03-27 DE DE19612045A patent/DE19612045A1/en not_active Withdrawn
-
1997
- 1997-03-13 AT AT97104267T patent/ATE201759T1/en not_active IP Right Cessation
- 1997-03-13 EP EP97104267A patent/EP0798511B1/en not_active Expired - Lifetime
- 1997-03-13 DK DK97104267T patent/DK0798511T3/en active
- 1997-03-17 NO NO971225A patent/NO308754B1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7498102B2 (en) | 2002-03-22 | 2009-03-03 | Bookeun Oh | Nonaqueous liquid electrolyte |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19612045A1 (en) | 1997-10-02 |
| ATE201759T1 (en) | 2001-06-15 |
| NO971225L (en) | 1997-09-29 |
| EP0798511A2 (en) | 1997-10-01 |
| EP0798511A3 (en) | 1998-08-12 |
| DK0798511T3 (en) | 2001-08-27 |
| NO308754B1 (en) | 2000-10-23 |
| NO971225D0 (en) | 1997-03-17 |
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