EP0798511B1 - Chaudière ainsi que son procédé de fonctionnement - Google Patents

Chaudière ainsi que son procédé de fonctionnement Download PDF

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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
Application number
EP97104267A
Other languages
German (de)
English (en)
Other versions
EP0798511A2 (fr
EP0798511A3 (fr
Inventor
Adolf Heeb
Wolfgang Kunkel
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.)
Hoval Interliz AG
Original Assignee
Hoval Interliz AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hoval Interliz AG filed Critical Hoval Interliz AG
Publication of EP0798511A2 publication Critical patent/EP0798511A2/fr
Publication of EP0798511A3 publication Critical patent/EP0798511A3/fr
Application granted granted Critical
Publication of EP0798511B1 publication Critical patent/EP0798511B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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.

Landscapes

  • 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)

Claims (10)

  1. Procédé d'exploitation d'une chaudière de chauffage dans lequel
    des combustibles solides sont pyrolysés avec addition d'air primaire,
    les fumées produites sont, par addition d'air secondaire et avec production de tourbillons, aspirées à travers une chambre de combustion allongée sensiblement horizontale,
    l'air secondaire est ajouté aux fumées avant leur entrée dans la chambre de combustion et
    dans la chambre de combustion sont produits deux tourbillons longitudinaux de sens contraire à axes sensiblement parallèles,
    caractérisé par le fait
    que la production des tourbillons longitudinaux est favorisée par une nervure longitudinale axiale située sur le côté intérieur de la chambre de combustion en face de l'entrée des fumées, et
    que les fumées sont introduites à une extrémité de la chambre de combustion et aspirées à l'autre extrémité, de sorte qu'a lieu une traversée axiale complète de la chambre de combustion.
  2. Procédé selon la revendication 1, caractérisé par le fait que les fumées, après leur mise en tourbillons, sont aspirées hors de la chambre de combustion en deux courants longitudinaux sensiblement axiaux et parallèles à travers deux zones sensiblement cylindriques situées en aval de l'entrée des fumées.
  3. Chaudière de chauffage pour la combustion de combustibles solides, comportant
    un espace de remplissage (1) pour la pyrolyse des combustibles,
    un conduit d'air primaire (3) débouchant dans cet espace de remplissage,
    une chambre de combustion allongée (4) à axe sensiblement horizontal,
    un conduit de fumées (5) qui relie l'extrémité inférieure de l'espace de remplissage (1) à la chambre de combustion (4),
    un ventilateur de tirage par aspiration (7) en liaison avec une extrémité de la chambre de combustion (4) et
    un conduit d'air secondaire (6) qui alimente la chambre de combustion (4),
    le conduit d'air secondaire (6) débouchant dans le conduit de fumées (5) et
    celui-ci débouchant radialement dans la chambre de combustion (4),
    caractérisée par le fait
    que la chambre de combustion (4) présente une nervure intérieure axiale (9) située en face du conduit de fumées (5) et
    que le conduit de fumées (5) débouche dans la chambre de combustion (4) à l'extrémité opposée à l'extrémité qui est en liaison avec le ventilateur de tirage par aspiration (7), de sorte qu'a lieu une traversée axiale complète de la chambre de combustion.
  4. Chaudière de chauffage selon la revendication 3, caractérisée par le fait que la nervure intérieure axiale (9) présente un dos à arête vive et se raccorde par un arrondi à la paroi de la chambre de combustion.
  5. Chaudière de chauffage selon l'une des revendications 3 et 4, caractérisée par le fait que le conduit de fumées (5) débouche sous forme de fente axiale dans la chambre de combustion (4).
  6. Chaudière de chauffage selon la revendication 5, caractérisée par le fait que le conduit d'air secondaire (6) s'étend au moins sur un côté de la fente axiale sensiblement parallèlement à celle-ci et est relié à celle-ci par au moins une buse à fente (8).
  7. Chaudière de chauffage selon l'une des revendications 5 et 6, caractérisée par le fait que la buse à fente (8) est inclinée dans la direction d'écoulement des fumées.
  8. Chaudière de chauffage selon l'une des revendications 5 à 7, caractérisée par le fait que les bords (10) de la fente axiale sont rentrés vers l'intérieur de manière arrondie.
  9. Chaudière de chauffage selon l'une des revendications 3 à 8, caractérisée par le fait que la section de la chambre de combustion (4) est, au moins dans la zone du conduit de fumées (5), sensiblement circulaire ou elliptique.
  10. Chaudière de chauffage selon l'une des revendications 3 à 9, caractérisée par le fait que la nervure intérieure axiale (9) s'étend sensiblement sur toute la longueur de la chambre de combustion (4).
EP97104267A 1996-03-27 1997-03-13 Chaudière ainsi que son procédé de fonctionnement Expired - Lifetime EP0798511B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19612045 1996-03-27
DE19612045A DE19612045A1 (de) 1996-03-27 1996-03-27 Heizkessel und Verfahren zu seinem Betreiben

Publications (3)

Publication Number Publication Date
EP0798511A2 EP0798511A2 (fr) 1997-10-01
EP0798511A3 EP0798511A3 (fr) 1998-08-12
EP0798511B1 true EP0798511B1 (fr) 2001-05-30

Family

ID=7789541

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97104267A Expired - Lifetime EP0798511B1 (fr) 1996-03-27 1997-03-13 Chaudière ainsi que son procédé de fonctionnement

Country Status (5)

Country Link
EP (1) EP0798511B1 (fr)
AT (1) ATE201759T1 (fr)
DE (1) DE19612045A1 (fr)
DK (1) DK0798511T3 (fr)
NO (1) NO308754B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT410254B (de) * 2000-09-01 2003-03-25 Froeling Heizkessel Und Behael Brennkammer für einen mit festbrennstoffen beheizbaren kessel
DE102006009335A1 (de) * 2006-03-01 2007-09-06 Viessmann Werke Gmbh & Co Kg Heizkessel, insbesondere für Bio-Festbrennstoffe
EP1983258A3 (fr) * 2007-03-13 2010-03-31 Central Boiler Inc. Brûleur à bois
EP2615369B1 (fr) * 2012-01-16 2019-05-29 Decona Holding B.V. Dispositif de chauffage

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE216131C (fr) *
DE3345202A1 (de) * 1983-12-14 1985-06-20 Franklin 8901 Kissing Schmidt Vorrichtung zur herabsetzung der taupunkttemperatur von abgasen
CH678652A5 (fr) * 1989-04-28 1991-10-15 Heitzmann Ag
AT400180B (de) * 1990-01-10 1995-10-25 Froeling Heizkessel Und Behael Festbrennstoffbeheizter unterbrand-kessel
DE4007849C3 (de) * 1990-03-12 1999-10-07 Hermann Hofmann Ofen für Festbrennstoffe
EP0563499A1 (fr) * 1992-03-31 1993-10-06 Liebi Lnc Ag Chaudière de gazéification du bois

Cited By (1)

* Cited by examiner, † Cited by third party
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 (de) 1997-10-02
ATE201759T1 (de) 2001-06-15
NO971225L (no) 1997-09-29
EP0798511A2 (fr) 1997-10-01
EP0798511A3 (fr) 1998-08-12
DK0798511T3 (da) 2001-08-27
NO308754B1 (no) 2000-10-23
NO971225D0 (no) 1997-03-17

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