EP2375154B1 - Dispositif de chauffage - Google Patents

Dispositif de chauffage Download PDF

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Publication number
EP2375154B1
EP2375154B1 EP11450048.1A EP11450048A EP2375154B1 EP 2375154 B1 EP2375154 B1 EP 2375154B1 EP 11450048 A EP11450048 A EP 11450048A EP 2375154 B1 EP2375154 B1 EP 2375154B1
Authority
EP
European Patent Office
Prior art keywords
ash
screw conveyor
heating device
sealing flap
opening
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.)
Active
Application number
EP11450048.1A
Other languages
German (de)
English (en)
Other versions
EP2375154A3 (fr
EP2375154A2 (fr
Inventor
Manfred Salmhofer
Robert Steinbauer
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.)
KWB Kraft und Waerme aus Biomasse GmbH
Original Assignee
KWB Kraft und Waerme aus Biomasse GmbH
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 KWB Kraft und Waerme aus Biomasse GmbH filed Critical KWB Kraft und Waerme aus Biomasse GmbH
Priority to SI201131836T priority Critical patent/SI2375154T1/sl
Publication of EP2375154A2 publication Critical patent/EP2375154A2/fr
Publication of EP2375154A3 publication Critical patent/EP2375154A3/fr
Application granted granted Critical
Publication of EP2375154B1 publication Critical patent/EP2375154B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J1/00—Removing ash, clinker, or slag from combustion chambers
    • F23J1/02—Apparatus for removing ash, clinker, or slag from ash-pits, e.g. by employing trucks or conveyors, by employing suction devices

Definitions

  • the invention relates to a heating device according to the preamble of claim 1.
  • Heating devices are known in which a burner is arranged such that the ash falls into an ash space.
  • a catchment area for fly ash is arranged.
  • Both in the ashtray and in the collecting space a screw conveyor are each arranged to convey out the ash from both the collecting space and the collecting space from the heater.
  • the two screw conveyors are arranged on a common worm shaft, which runs through a partition wall between the ash space and the collecting space.
  • a special stowage channel is arranged in which the ash supplied from the catchment space is compacted and jammed, and ultimately conveyed through a - in use position - arranged at the top of the stowage and reaching into the ash space opening into the ash becomes.
  • the relevant opening can be closed by means of a flap.
  • the passage of the worm shaft takes place in the area of an ash-tight retaining wall of the storage channel, and not in the area of the opening which can be closed by the flap.
  • Such a heater is approximately in the AT 506 305 B1 described.
  • the stagnation channel As well as the compression of the ashes in this, considered to be indispensable, in order to achieve a gas-tight seal of the collecting space from the ash space. Due to this accumulation channel, the compression of the ash in the stagnation channel and the pushing up of the ash through the opening, however, a high drive power for the worm shaft is required. Due to the necessary high external drive power, however, the overall efficiency of such a heater decreases.
  • the WO 99/57490 A1 discloses a coal burner comprising a heat exchanger, a burner, a coal comminution unit and an outlet.
  • the object of the invention is therefore to provide a heating device of the type mentioned, with which the mentioned disadvantages can be avoided, which can be made compact and compact, and has a high efficiency.
  • a heating device can be formed, which can be made compact and space-saving.
  • Such a heater has fewer parts than known heaters, and is therefore cheaper to produce. Due to the omission of a stowage chamber, a pitot tube or a stowage channel, and the damming or
  • a heating device has a high efficiency.
  • a storage channel is not required to achieve a gas-tight seal the opening between the ash compartment and the collecting space, but rather that a gas-tight seal the passage opening even waiving such a storage channel and just waiving the compression of the ash in successful in this area.
  • the stowage chamber or the stowage channel is dispensed with. Rather, the gas-tight sealing takes place on the basis of the ashes which are loosely following the passage opening and / or underneath the sealing flap.
  • Fig. 1 and 2 show in each case preferred embodiments of a heating device comprising a burner 3, an ash chamber 2, a collecting space 4 for fly ash, a first screw conveyor 9 and a second screw conveyor 8, wherein the burner 3 with particulate fuel, in particular pellets, can be fed, and wherein the burner is arranged in the region of the ash compartment 2, wherein the collecting space 4 is separated by a partition wall 5 from the adjacent ash compartment 2, wherein the first screw conveyor 9 in the ash compartment 2 and the second screw conveyor 8 is arranged in the collecting space 4, wherein the first screw conveyor 9 and the second screw conveyor 8 have a common screw shaft 13, and wherein the partition wall 5 has a passage opening 14 for the worm shaft 13, wherein the heater has a sealing flap 11 for, in particular immediate, closing the passage opening 14, which sealing flap 11 can be opened by conveyed ash.
  • a heating device can be formed, which can be made compact and space-saving.
  • Such a heater has fewer parts than known heaters, and is therefore less expensive to produce. Due to the omission of a stowage chamber, a pitot tube or a stowage channel, and the damming or
  • a heating device has a high efficiency.
  • a jam channel is not required to achieve a gas-tight seal the opening between the ash chamber and the collecting space, but rather that a gas-tight seal the passage opening 14 and waiving such a jam channel and just waiving the compaction of the ash successful in this area.
  • the stowage chamber or the stowage channel is dispensed with. Rather, the gas-tight sealing takes place on the basis of the ashes subsequently loosely following the lead-through opening 14 and / or under the sealing flap 11.
  • FIGS. 1 and 2 show a detail of a schematically illustrated detail of a particularly preferred embodiment of a heating device according to the invention. Information above, below or the like, are - unless otherwise stated - always related to the operating position of the heater shown in the figures.
  • the heating device has a burner 3, which is designed as a burner 3, which can be charged with lumpy fuel.
  • a burner 3 which can be charged with lumpy fuel.
  • Such chunky or crushed fuel is present in the form of pellets, but other, non-pelletized, particulate fuels, such as wood chips or cereals, may be provided.
  • the burner 3 is associated with a device for substantially continuously feeding the lumpy fuel, such as a fuel screw conveyor, or a conveyor belt.
  • the burner 3 can be designed as a burner 3 of different design.
  • the burner 3 - as shown - designed as a ring or undershot burner, wherein it is provided in particular that the burner plate is driven to rotate, or that a driven rotatable ash ring is arranged around a fixed burner plate.
  • the resulting ash by means of ashtray which preferably has a Abschabfortsatz, from Scraped burners and piled laterally next to or below the burner 3.
  • the area next to and / or below the burner 3 is therefore referred to as ash compartment 2.
  • a combustion chamber 1 is arranged, in which the flame occurring in a combustion process over the burner 3 takes place.
  • the burner type shown here as preferred such as a conveyor belt burner, can also be provided that the burner 3 is located locally above the ash chamber 2, and the ash falls from the burner 3 in the ash compartment down or is pushed.
  • the heating device furthermore preferably has a heat exchanger (not shown).
  • This heat exchanger is fluidically arranged at least indirectly downstream of the combustion chamber 1, and serves to deliver the heat of the combustion gases to another medium, such as water.
  • a chimney is preferably arranged. It may be fluidly below the combustion chamber 1 and a so-called. Sturzzug be provided.
  • the heater further has a collecting space 4 for fly ash.
  • This collecting space 4 is arranged adjacent to the combustion chamber 1 and / or the ashtray 2, and separated from them by a partition wall 5.
  • the ash compartment 2, the combustion chamber 1 and the collecting space 4 are preferably formed as a metal construction, in particular comprising heat-resistant steel, and have at least at the thermally highly loaded areas a chamotte, therefore a lining of the walls with fireclay. It is preferably provided that the heat exchanger, not shown, is arranged above the collecting space 4, and that ash falling out of the combustion gases in the area of the heat exchanger is collected at the bottom of the collecting space 4.
  • a heating device To remove the ash from the collecting space 4 and the ash space 2, a heating device according to the invention has a first screw conveyor 9 and a second screw conveyor 8.
  • the first screw conveyor 9 is arranged in the ashtray 2, and the second screw conveyor 8 in the collecting space 4.
  • the first screw conveyor 9 and the second screw conveyor 8 have a common screw shaft 13.
  • the term common worm shaft 13 designates in this context that by means of a shaft torque is transmitted from one of the two screw conveyors 8, 9 to the other of the two screw conveyors 9, 8.
  • first and the second screw conveyor 9, 8 are actually arranged on a physically integral worm shaft 13, but it can also be provided that the first and the second screw conveyor 9, 8 are formed separately, and only by means of a common Worm shaft 13 are connected such that a transmission of torque is possible.
  • any type of coupling between two shafts can be provided which withstands the temperatures to be expected in the region of a burner.
  • a serration connection or a feather key connection can be provided.
  • the second screw conveyor 8 is driven by an external drive 6, in particular an electric motor, and that the second screw conveyor 8 is connected to the first screw conveyor 9 by means of the common screw shaft 13. As a result, the torque of the external drive 6 is transmitted to the first conveyor screw 9.
  • the second screw conveyor 8 is designed such that ash from the collecting space 4 is conveyed in the direction of the partition wall 5. It is envisaged that the partition wall 5 has a passage opening 14 for the worm shaft 13, and the worm shaft 13 extends through this passage opening 14 therethrough. The subsidized by the second auger 8 in the direction of the partition wall 5 ashes is subsequently promoted in continuous Nachone the ash through the passage opening 14, in particular pushed. It is preferably provided that the worm shaft 13 is rotatably mounted in the region of the passage opening 14.
  • the first screw conveyor 9 connected to the second screw conveyor 8 has the same conveying direction as the second screw conveyor 8 and is designed to convey ash from the ash compartment 2 in the direction of an ash discharge 10.
  • the ash discharge 10 is preferably designed as a tube, which is led out of the ash space 2 or the combustion chamber 1. In particular, a gas-tight closure of the ash tray 10 is provided, which, however, is not shown.
  • the heating device may be provided to convey ash from further assemblies of the heating device into the collecting space 4.
  • the heating device preferably has a further conveying screw designated as a transverse screw conveyor 7, which according to the illustrated preferred embodiment is driven by the second conveyor rack 8 by means of a star-shaped carrier 12, with which the star-shaped carrier 12 is at least temporarily in operative connection.
  • a passage opening 14 is arranged in the partition 5.
  • This passage opening 14 preferably has a U-shaped cross section, provided that a bearing of the worm shaft 13 and / or a region of the partition wall 5 is arranged as intended in the region of the passage opening 14.
  • the sealing flap 11 has at least one open-edged recess 15 to allow opening and closing of the flap, wherein the worm shaft 13, the sealing flap 11 penetrates in the region of the open-edged recess 15.
  • the worm shaft has a bearing 16 in the region of the leadthrough opening 14, and that the open-edged recess 15 cooperates with a bearing of the worm shaft 13 in a position of the sealing flap 11 closing the leadthrough opening 14, therefore the sealing flap 11 in its closed position the around the bearing of the worm shaft 13 arranged around opening 14 closes.
  • the sealing flap 11 preferably has a U-shaped base surface, wherein the open-edged recess of the U-shaped base surface in the operating position generally points downwards. As a result, the sealing of the passage opening 14 can be ensured easily and safely.
  • the passage opening 14 is arranged directly in the partition wall 5, which can be dispensed with further assemblies, and the arrangement has only a small footprint.
  • the area around the lead-through opening 14 is free of bins, in particular free of stauro tubes or free of stagnant channels.
  • At least one roof-like projection 17 is arranged in the region of the passage opening 14 and on the side of the partition wall 5 facing the collecting space 4.
  • the roof-like projection (17) - in the conveying direction of the first screw conveyor (9) and the second screw conveyor (8) - has a substantially circular segment-like cross-section, whereby a particularly simple production of a tube is possible.
  • Such a trained roof-like projection 17 further has the advantage of missing horizontal deck surfaces on which ash could accumulate.
  • the sealing flap 11 is designed to close the passage opening 14 when no ash is arranged in the passage opening 14, or at least partially open or ., when ash is disposed in the passage opening 14.
  • the only Fig. 1 and 2 show a preferred embodiment of the sealing flap 11 both in an open position, wherein the sealing flap 11 * in this position by the reference numeral 11 * is designated, as well as in a closed position, in which the sealing flap 11 is shown in a sectional view.
  • the sealing flap 11 * is shown in dashed lines in its open position.
  • the sealing flap 11 rests substantially directly against the dividing wall 5 in a position closing the passage opening 14.
  • sealing flap 11 rests substantially directly on the partition wall 5, referred to in this context that the sealing flap 11 either rests directly on the partition wall 5 or that in the region of the passage opening 14 a reinforced area, such as a flange, arranged in the partition wall 5 is, and that the sealing flap 11 rests against this reinforced area.
  • the sealing flap 11 is preferably formed and / or arranged such that the sealing flap 11 can be opened by conveyed ash, therefore opened by ash, which is conveyed or moved by the second screw conveyor in the direction of the partition wall 5 and the lead-through opening 14, in particular pressed , becomes. It has been shown that even when conveying the ash against the still closed sealing flap 11, a certain low compression of the ash takes place, even if no special, in particular Closed circumferentially, storage chamber is provided, and that this low compression of the ash is already completely sufficient to achieve a gas-tight seal the passage opening 14 at least partially open the sealing flap 11.
  • the stowage channels or storage chambers provided in the prior art therefore represent a technical prejudice, which is overcome by the subject invention.
  • the ash conveyed through the lead-through opening 14 forms an ash pile in the region between the lead-through opening 14 and the first screw conveyor 9, which seals the lead-through opening 14 in a gastight manner.
  • the sealing flap 11 is preferably formed as a metal plate, in particular as a steel plate.
  • the thickness of the sealing flap 11 is to be chosen such that it is stable enough to withstand the thermal loads without damage over a long period of time, and that this is easy enough to be lifted by the conveyed ash.
  • the dimensioning takes place depending on the size of the passage opening 14 and the expected volume flow or mass flow of the promoted ash.
  • the sealing flap 11 is arranged and / or formed such that it closes the passage opening 14 due to gravity, at least in an ashless state. This can ensure that a substantially gas-tight seal of the passage opening 14 takes place as long as no ash is arranged in the passage opening 14.
  • the substantially immediate storage of the sealing flap 11 has been found on the partition wall 5.
  • the sealing flap 11 is preferably - viewed in the position of use - rotatably mounted on an upper portion of the sealing flap 11.
  • the partition wall 5 in the conveying direction of the first screw conveyor 9 and the second screw conveyor 8 - as shown - is arranged inclined.
  • a secure fit of the sealing flap 11 can be achieved in the closed position of the lead-through opening 14, since the sealing flap 11 can always rest fully on the partition wall 5.
  • fluttering of the sealing flap and the generation of vibrations in the heating device can be prevented.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Processing Of Solid Wastes (AREA)

Claims (9)

  1. Dispositif de chauffage comprenant un brûleur (3), une chambre à cendres (2), une chambre collectrice (4) pour cendres volantes, un premier transporteur à vis (9) et un deuxième transporteur à vis (8), le brûleur (3) pouvant être alimenté en combustible granulaire, en particulier en pellets, et le brûleur (3) étant disposé dans la zone de la chambre à cendres (2), la chambre collectrice (4) étant séparée de la chambre à cendres (2) adjacente par une paroi de séparation (5), le premier transporteur à vis (9) étant disposé dans la chambre à cendres (2) et le deuxième transporteur à vis (8) dans la chambre collectrice (4), le premier transporteur à vis (9) et le deuxième transporteur à vis (8) présentant un arbre de vis commun (13) et la paroi de séparation (5) présentant une ouverture de passage (14) pour l'arbre de vis (13), le dispositif de chauffage présentant un volet d'étanchéité (11) pour fermer, en particulier directement, l'ouverture de passage (14), caractérisé en ce que le volet d'étanchéité (11) présente au moins un évidement (15) ouvert au bord et pouvant être ouvert par les cendres transportées, que l'arbre de vis (13) présente un palier (16) dans la zone de l'ouverture de passage (14) et que l'évidement (15) ouvert au bord coopère avec le palier (16) de l'arbre de vis (13) dans une position du volet d'étanchéité (11) qui ferme l'ouverture de passage (14), de sorte que le volet d'étanchéité (11), dans sa position fermée, ferme l'ouverture de passage (14) disposée autour du palier (16) de l'arbre de vis (13).
  2. Dispositif de chauffage selon la revendication 1, caractérisé en ce que, dans une position fermant l'ouverture de passage (14), le volet d'étanchéité (11) repose sensiblement directement contre la paroi de séparation (5).
  3. Dispositif de chauffage selon la revendication 1 ou 2, caractérisé en ce que le volet d'étanchéité (11) est disposé et/ou réalisé de telle sorte qu'il puisse être ouvert par des cendres transportées par le deuxième transporteur à vis (8).
  4. Dispositif de chauffage selon l'une des revendications 1 à 3, caractérisé en ce que le volet d'étanchéité (11) est disposé et/ou réalisé de telle sorte que, au moins à l'état exempt de cendres, il ferme par gravité l'ouverture de passage (14).
  5. Dispositif de chauffage selon l'une des revendications 1 à 4, caractérisé en ce que le volet d'étanchéité (11) est monté sensiblement directement sur la paroi de séparation (5).
  6. Dispositif de chauffage selon l'une des revendications 1 à 5, caractérisé en ce que, vu en position d'utilisation, le volet d'étanchéité (11) est monté mobile en rotation au niveau d'une zone supérieure du volet d'étanchéité (11).
  7. Dispositif de chauffage selon l'une des revendications 1 à 6, caractérisé en ce que la paroi de séparation (5) est disposée inclinée dans la direction de transport du premier transporteur à vis (9) et du deuxième transporteur à vis (8).
  8. Dispositif de chauffage selon l'une des revendications 1 à 7, caractérisé en ce qu'au moins une saillie en forme de toit (17) est disposée dans la zone de l'ouverture de passage (14) et du côté de la paroi de séparation (5) tourné vers la chambre collectrice (4).
  9. Dispositif de chauffage selon la revendication 8, caractérisé en ce que la saillie en forme de toit (17) présente, dans la direction de transport du premier transporteur à vis (9) et du deuxième transporteur à vis (8), une section transversale sensiblement en forme de segment de cercle.
EP11450048.1A 2010-04-07 2011-04-05 Dispositif de chauffage Active EP2375154B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI201131836T SI2375154T1 (sl) 2010-04-07 2011-04-05 Grelna naprava

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0055810A AT509488B1 (de) 2010-04-07 2010-04-07 Heizvorrichtung

Publications (3)

Publication Number Publication Date
EP2375154A2 EP2375154A2 (fr) 2011-10-12
EP2375154A3 EP2375154A3 (fr) 2017-12-27
EP2375154B1 true EP2375154B1 (fr) 2019-10-23

Family

ID=44202904

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11450048.1A Active EP2375154B1 (fr) 2010-04-07 2011-04-05 Dispositif de chauffage

Country Status (3)

Country Link
EP (1) EP2375154B1 (fr)
AT (1) AT509488B1 (fr)
SI (1) SI2375154T1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU199719U1 (ru) * 2020-07-17 2020-09-16 Общество с ограниченной ответственностью "Светлобор" Клапан устройства выгрузки золы из котла

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Publication number Priority date Publication date Assignee Title
DE602580C (de) * 1932-09-20 1934-09-12 Fuller Co Foerdereinrichtung mit Foerderschnecke und Blasstrom zur Durchlueftung des Foerderguts an einer in der Foerderrichtung hinter der Schnecke gelegenen Stelle
GB856517A (en) * 1958-09-23 1960-12-21 Bartholomew & Son Ltd J Improvements relating to combustion chambers for furnaces
DE3320595A1 (de) * 1983-06-08 1984-12-13 Rheinische Braunkohlenwerke AG, 5000 Köln Schneckenfoerderer zum austragen von festen rueckstaenden aus unter hoher temperatur und ueberdruck betriebenen einrichtungen
US6694566B1 (en) * 1992-06-22 2004-02-24 Douglas A. J. Mockett Grommet
CN1115520C (zh) * 1998-05-01 2003-07-23 天海锅炉株式会社 燃煤锅炉
JP3724331B2 (ja) * 1999-06-21 2005-12-07 住友電装株式会社 グロメットの止水検査具及び仮保持ホルダ
US6397762B1 (en) * 2000-06-09 2002-06-04 Berco Industries, Inc. Work table
AT506305B1 (de) 2008-03-03 2009-08-15 Hargassner Ges Mbh Heizkessel

Non-Patent Citations (1)

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Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU199719U1 (ru) * 2020-07-17 2020-09-16 Общество с ограниченной ответственностью "Светлобор" Клапан устройства выгрузки золы из котла

Also Published As

Publication number Publication date
EP2375154A3 (fr) 2017-12-27
AT509488B1 (de) 2011-09-15
AT509488A4 (de) 2011-09-15
SI2375154T1 (sl) 2020-04-30
EP2375154A2 (fr) 2011-10-12

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