EP0798511A2 - Chaudière ainsi que son procédé de fonctionnement - Google Patents

Chaudière ainsi que son procédé de fonctionnement Download PDF

Info

Publication number
EP0798511A2
EP0798511A2 EP97104267A EP97104267A EP0798511A2 EP 0798511 A2 EP0798511 A2 EP 0798511A2 EP 97104267 A EP97104267 A EP 97104267A EP 97104267 A EP97104267 A EP 97104267A EP 0798511 A2 EP0798511 A2 EP 0798511A2
Authority
EP
European Patent Office
Prior art keywords
combustion chamber
flue gas
essentially
boiler according
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.)
Granted
Application number
EP97104267A
Other languages
German (de)
English (en)
Other versions
EP0798511A3 (fr
EP0798511B1 (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

Links

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 for operating a boiler, solid fuels being pyrolyzed with the addition of primary air and the flue gases formed being sucked axially through an elongated, essentially horizontal combustion chamber with the addition of secondary air and with swirling.
  • Such a method and such a device are known from AT 400 180 B.
  • the induced draft fan ensures that the primary air enters the filling chamber in which the pyrolysis takes place.
  • the flue gases generated during pyrolysis are sucked tangentially into the cylindrical combustion chamber. There a cyclone-like longitudinal vortex is created, into which the secondary air is sucked in.
  • the method mentioned at the outset is characterized in that the secondary air releases the flue gases before they enter the combustion chamber is added and that two opposing, essentially parallel-axis longitudinal vortices are generated in the combustion chamber.
  • the flue gas duct forms a narrowest cross-section of the system, so to speak, with a correspondingly high speed. This leads to a very good mixing of the secondary air into the pyrolysis flue gases.
  • the mixture then enters the combustion chamber radially and meets the axial inner rib on the opposite combustion chamber wall. Here the mixture flow divides and forms the two opposing longitudinal vortices, which penetrate each other during their axial migration through the combustion chamber and thus cause extremely even and low-pollutant combustion.
  • the formation of the opposing longitudinal vortices can be promoted by the fact that the axial inner rib has a sharp-edged back and merges into the combustion chamber wall in a rounded manner.
  • the flue gas duct opens as an axial slot in the combustion chamber.
  • a certain axial length of the combustion chamber is already acted upon by the mixture consisting of the flue gases and the secondary air, namely with a relatively thin, broadband gas stream, which is in correspondingly broadband, still thinner longitudinal eddy currents split. This also helps to make the combustion even.
  • a further preferred feature is that the secondary air duct runs essentially parallel to the axial slot at least on one side and is connected to it by at least one slot nozzle.
  • the secondary air preheated in this way is sucked through the slot nozzle into the flue gas duct at a relatively high speed, at a point where there is also a relatively high flow speed.
  • edges of the axial slot are rounded inwards so that the opposing vortices in the upper region are pressed down towards the center of the combustion chamber and thus meet in the region of the combustion chamber center. This also promotes thorough mixing.
  • the cross section of the combustion chamber is essentially circular or elliptical at least in the area of the flue gas duct. Excellent results were achieved, in particular with circular cross sections. But the elliptical shape also 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 continues until the end of the combustion chamber.
  • the essentially elliptical region of the combustion chamber associated with the flue gas duct is followed by two essentially cylindrical regions which run parallel to one another on both sides of the plane defined by the axial inner rib up to the end of the combustion chamber.
  • the gas flow is thus divided within the combustion chamber after it has been mixed into two parallel combustion zones, in which the swirling continues.
  • the combustion chamber is preferably arranged below the filling chamber, the flue gas duct running essentially vertically. This results in a particularly favorable design and a uniform gas flow in the footwell of the filling chamber, in particular if the flue gas duct starts from the center of the filling chamber floor.
  • a filling chamber 1 and 2 has a filling chamber 1, in which solid fuel 2 is pyrolyzed.
  • a primary air duct 3 opens in the filling chamber 1, which is only indicated schematically here.
  • An elongated combustion chamber 4 with a horizontal axis is located below the filling chamber.
  • the combustion chamber 4 is connected to the filling chamber 1 via a flue gas duct 5.
  • the mouth of the flue gas guide 5 lies at the right end of the combustion chamber 4, at which it 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, specifically via a secondary air duct 6, which is only shown schematically in FIG. 1, but is more clearly shown in FIG. 2.
  • a suction fan 7 creates a negative pressure in the room in which the combustion chamber 4 opens. This leads to the fact that flue gases are sucked out of the filling chamber 1 through the flue gas duct 5 into the combustion chamber 4. At the same time, primary air is sucked through the primary air duct 3 into the filling chamber 1. Secondary air is also drawn in through the secondary air duct 6.
  • Fig. 2 shows that the secondary air duct 6 consists of two channels which run parallel to the flue gas duct 5 on both sides thereof, the flue gas duct 5 being designed as an axial slot in this area.
  • the connection of the secondary air duct 6 with the flue gas duct 5 consists of slot nozzles 8 which are inclined in the direction of flow of the flue gas. Before entering the combustion chamber 4, the flue gases are thoroughly mixed with the secondary air.
  • the flue gas guide 5 opens radially into the combustion chamber 4. Opposite it, the combustion chamber has an axial inner rib 9, which has a sharp-edged back and merges into the combustion chamber wall in a rounded manner.
  • the interior of the combustion chamber is otherwise circular.
  • the embodiment according to FIG. 3 differs from that according to FIG. 2 in that the combustion chamber 4 is essentially elliptical, apart from the axial inner rib 9 and apart from the fact that the edges 10 of the slot-shaped exhaust duct 5 are rounded rounded inwards.
  • the opposing longitudinal vortices are thus directed more towards the center of the combustion chamber in the upper area, where there is particularly intensive mixing.
  • combustion chamber 4 is only elliptical in the area that is assigned to the flue gas duct 5. This area is followed by two cylindrical areas 11, which divide the swirling flue gas flow into two partial flows. The latter run parallel to each other on both sides of the plane defined by the axial inner rib 9.
  • the combustion chamber 4 is arranged centrally below the filling chamber 1, since this leads to an inexpensive, narrow design and to a uniform gas extraction from the filling chamber.
  • the combustion chamber can also be located to the side of the filling chamber. It is also possible to change the cross section of the combustion chamber over its length and also to incline the axis of the combustion chamber to a limited extent with respect to the horizontal.
  • different cross-sectional shapes of the combustion chamber come into question, for example polygonal polygons, although the circular shape in particular has proven particularly useful. Changes are also conceivable with regard to the cross-sectional shape of the axial inner rib.

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)
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 true EP0798511A2 (fr) 1997-10-01
EP0798511A3 EP0798511A3 (fr) 1998-08-12
EP0798511B1 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 (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1983258A3 (fr) * 2007-03-13 2010-03-31 Central Boiler Inc. Brûleur à bois
DE10142444B4 (de) * 2000-09-01 2010-09-16 Fröling Heizkessel- und Behälterbau Ges.m.b.H. Brennkammer für einen mit Festbrennstoffen beheizbaren Kessel
EP2615369A1 (fr) * 2012-01-16 2013-07-17 Cheap Heat B.V. Dispositif de chauffage

Families Citing this family (2)

* 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
DE102006009335A1 (de) * 2006-03-01 2007-09-06 Viessmann Werke Gmbh & Co Kg Heizkessel, insbesondere für Bio-Festbrennstoffe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4012363A1 (de) * 1989-04-28 1990-10-31 Heitzmann Ag Schachen Vorrichtung zum verbrennen fester brennstoffe, insbesondere holz
DE4007849A1 (de) * 1990-03-12 1991-09-19 Hermann Hofmann Ofen fuer festbrennstoffe
EP0563499A1 (fr) * 1992-03-31 1993-10-06 Liebi Lnc Ag Chaudière de gazéification du bois
AT400180B (de) * 1990-01-10 1995-10-25 Froeling Heizkessel Und Behael Festbrennstoffbeheizter unterbrand-kessel

Family Cites Families (2)

* 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

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4012363A1 (de) * 1989-04-28 1990-10-31 Heitzmann Ag Schachen Vorrichtung zum verbrennen fester brennstoffe, insbesondere holz
AT400180B (de) * 1990-01-10 1995-10-25 Froeling Heizkessel Und Behael Festbrennstoffbeheizter unterbrand-kessel
DE4007849A1 (de) * 1990-03-12 1991-09-19 Hermann Hofmann Ofen fuer festbrennstoffe
EP0563499A1 (fr) * 1992-03-31 1993-10-06 Liebi Lnc Ag Chaudière de gazéification du bois

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10142444B4 (de) * 2000-09-01 2010-09-16 Fröling Heizkessel- und Behälterbau Ges.m.b.H. Brennkammer für einen mit Festbrennstoffen beheizbaren Kessel
EP1983258A3 (fr) * 2007-03-13 2010-03-31 Central Boiler Inc. Brûleur à bois
EP2615369A1 (fr) * 2012-01-16 2013-07-17 Cheap Heat B.V. Dispositif de chauffage

Also Published As

Publication number Publication date
DE19612045A1 (de) 1997-10-02
ATE201759T1 (de) 2001-06-15
NO971225L (no) 1997-09-29
EP0798511A3 (fr) 1998-08-12
DK0798511T3 (da) 2001-08-27
NO308754B1 (no) 2000-10-23
NO971225D0 (no) 1997-03-17
EP0798511B1 (fr) 2001-05-30

Similar Documents

Publication Publication Date Title
EP0436113B1 (fr) Procédé pour le fonctionnement d'une installation de combustion
EP0111874B1 (fr) Installation pour brûler la poussière de charbon
EP0286077B1 (fr) Procédé pour la combustion de déchets
DE3038875C2 (de) Müllverbrennungsanlage
EP0724114A2 (fr) Brûleur
EP0321809A1 (fr) Procédé pour la combustion de combustible liquide dans un brûleur
EP0684428A2 (fr) Dispositif pour l'injection d'air dans l'espace de combustion d'un brûleur de torche et brûleur de torche
EP0780630A2 (fr) Brûleur pour un générateur de chaleur
DE4440716A1 (de) Rußfilteranlage für Verbrennungsmotor
EP0798511B1 (fr) Chaudière ainsi que son procédé de fonctionnement
DE2745756C3 (de) Verbrennungsofen
DE69618914T2 (de) Brennstoff-Einspritzvorrichtung und -verfahren
DE4243834C2 (de) Abgaserfassungshaube mit stabilisierter Drallströmung
EP0777082A2 (fr) Brûleur à prémélange
EP0602396A1 (fr) Générateur de chaleur pour processus industriel
EP0961905B1 (fr) Procede et dispositif de combustion d'un combustible
EP2587148B1 (fr) Chambre de combustion secondaire avec injection d'air secondaire
DE4323300A1 (de) Mischvorrichtung für einen Brenner
AT397551B (de) Verbrennungsofen
DE4435640A1 (de) Verfahren und Brenner zur Verbrennung von staubförmigem Brennstoff
EP0605821B1 (fr) Hotte d'évacuation de fumées
DE3625397C2 (fr)
EP0867658B1 (fr) Procédé et dispositif pour la combustion d'un combustible liquide
DE2552265C3 (de) Brenner für flüssigen Brennstoff
DE2253542A1 (de) Verfahren und anordnung zum erniedrigen des dynamischen druckes der verbrennungsluft an einem in den brennerkopf von oelfeuerungsaggregaten fuehrenden turbulator

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT CH DK FI FR IT LI SE

AX Request for extension of the european patent

Free format text: SI PAYMENT 970313

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT CH DK FI FR IT LI SE

AX Request for extension of the european patent

Free format text: SI PAYMENT 970313

17P Request for examination filed

Effective date: 19980819

17Q First examination report despatched

Effective date: 19990629

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DK FI FR IT LI SE

AX Request for extension of the european patent

Free format text: SI PAYMENT 19970313

REF Corresponds to:

Ref document number: 201759

Country of ref document: AT

Date of ref document: 20010615

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

ITF It: translation for a ep patent filed
REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20030218

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20030304

Year of fee payment: 7

Ref country code: FI

Payment date: 20030304

Year of fee payment: 7

Ref country code: AT

Payment date: 20030304

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 20030306

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20030314

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040313

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040313

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040314

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040331

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040331

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040331

EUG Se: european patent has lapsed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041130

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050313