EP2267364A1 - Brennstoffversorgungssystem für einen Stückigbrennstoff-Heizkessel - Google Patents

Brennstoffversorgungssystem für einen Stückigbrennstoff-Heizkessel Download PDF

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Publication number
EP2267364A1
EP2267364A1 EP10305679A EP10305679A EP2267364A1 EP 2267364 A1 EP2267364 A1 EP 2267364A1 EP 10305679 A EP10305679 A EP 10305679A EP 10305679 A EP10305679 A EP 10305679A EP 2267364 A1 EP2267364 A1 EP 2267364A1
Authority
EP
European Patent Office
Prior art keywords
worm
fuel
feeding system
duct
combustion chamber
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.)
Withdrawn
Application number
EP10305679A
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English (en)
French (fr)
Inventor
Raphaël NONNENMACHER
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.)
Supra AB
Original Assignee
Supra AB
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 Supra AB filed Critical Supra AB
Publication of EP2267364A1 publication Critical patent/EP2267364A1/de
Withdrawn legal-status Critical Current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
    • F23B40/00—Combustion apparatus with driven means for feeding fuel into the combustion chamber
    • F23B40/02—Combustion apparatus with driven means for feeding fuel into the combustion chamber the fuel being fed by scattering over the fuel-supporting surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B50/00—Combustion apparatus in which the fuel is fed into or through the combustion zone by gravity, e.g. from a fuel storage situated above the combustion zone
    • F23B50/12—Combustion apparatus in which the fuel is fed into or through the combustion zone by gravity, e.g. from a fuel storage situated above the combustion zone the fuel being fed to the combustion zone by free fall or by sliding along inclined surfaces, e.g. from a conveyor terminating above the fuel bed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
    • F23K3/16—Over-feed arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2203/00—Feeding arrangements
    • F23K2203/20—Feeding/conveying devices
    • F23K2203/202—Feeding/conveying devices using screws

Definitions

  • the present invention relates to the field of means for conveying or conveying fragmented or particulate materials, in particular the means for gradually feeding solid combustible materials into a combustion device or apparatus.
  • the invention relates to a feed system for a fragmented solid fuel device or apparatus and to a heating apparatus comprising such a system.
  • Feeding systems of this type are already known, in particular from the documents DE-U-92 18953 and EP-A-1,327,825 .
  • These systems generally consist of a worm screw sheet, plastic or a similar hard and resistant material, mounted in a tubular conduit. This duct extends from the fuel storage tank to the vicinity of the combustion chamber, generally extending through a spill tip which opens into the combustion chamber.
  • the conduit has an inlet opening at its lower end through which the fuel is removed by the screw, to be then gradually fed into the tube to the outlet opening, optionally provided with the spill tip.
  • the assembly [tubular conduit / worm] can be arranged more or less inclined or substantially vertical.
  • the present invention is primarily intended to overcome at least some of the aforementioned drawbacks.
  • a feed system for a device or apparatus for heating solid fuel fragmented in the form of granules, chips, grains, pellets, platelets forest, sawdust or similar particles said system removing the fragments or particles of fuel at the bottom of a hopper or similar storage tank and bringing them into a combustion chamber of said device or apparatus
  • said feeding system being essentially constituted by a conveying means mainly comprising, on the one hand, a tubular conduit with a lower inlet opening located at the lower part of the storage tank and an upper outlet opening in communication with the combustion chamber and, secondly, a worm mounted movably in said duct extending between said lower and upper openings, said conveying means also comprising a controlled and / or controlled operation actuator, driving the screw endless rotation about its longitudinal axis so as to convey fragments or particles of fuel from the inlet opening to the outlet opening, characterized in that the tubular duct is closed axially at its lower end and in that the inlet opening is in the form of at least
  • This feed system 1 essentially consists of a conveying means 5 mainly comprising, on the one hand, a tubular duct 6 with a lower inlet opening 7 located at the lower part 3 'of the storage tank 3 and an upper outlet opening 8 in communication with the combustion chamber 4 and, on the other hand, an endless screw 9 rotatably mounted in said duct 6 extending between said lower and upper openings 7 and 7, conveying 5 also comprising an actuator 10 with controlled and / or controlled operation, driving the worm 9 in rotation about its longitudinal axis 9 'so as to convey the fragments or particles of fuel from the inlet opening 7 to the at the exit aperture 8.
  • the tubular duct 6 is closed axially at its lower end 6 'and the inlet opening 7 is in the form of at least one lateral cutout formed or formed in the wall 6 "of the tubular duct 6, being offset with respect to the edge 6 "'of the lower end 6' of the latter.
  • a flange 12 is formed between the bottom of the tank 3 and the inlet opening 7, the lateral removal of granules or the like being thus performed at a certain distance from said bottom.
  • the lower end 6 'of the tubular duct 6 is closed by a plate or closure wall 11 forming part of or resting on the bottom 3 "of the lower part 3' of the storage tank 3 and said tubular duct 6 includes a cutout forming an inlet opening 7 delimited by an annular rim portion 12 at the lower end 6 ', the worm 9 extending substantially as far as the closing plate or wall 11.
  • the size of the tubular duct 6 and the dimensions of the worm 9 are adapted to the average size of the fragments to the fuel particles to be taken and conveyed. It is the same for the size of the cutouts forming the openings 7 and 8 inlet and outlet, the latter may also have various shapes (circular, triangular, square, rectangular, ).
  • the inlet opening 7 of the tubular duct 6 has a substantially rectangular shape, with a height substantially equivalent to the pitch of the screw 9 'of the auger 9 and an apparent width substantially equivalent to the diameter of said tubular duct 6, the cutout extending about half of the circular perimeter in section of said duct 6.
  • the upper end 9 "'of the helix 9" of the worm 9 is substantially flush with the lower edge 8' of the outlet opening 8, preferably in the form of a lateral cutout formed or formed in the wall 6 "of the tubular duct 6, preferably located at a short distance from the upper end of the latter and optionally extended by a chute, a conduit or a spout tip 13 opening and, where appropriate, s' extending into the combustion chamber 4.
  • the upper outlet opening 8 advantageously also has a height substantially equivalent to the pitch of the helix 9 'of the worm 9.
  • the tubular duct 6 is disposed substantially vertically in the reservoir 3.
  • the inlet and outlet openings 7 and 8 advantageously consist of cutouts. laterally arranged or formed in the wall 6 "of said duct 6, the admission of granules or the like in said duct 6 taking place by direct lateral sampling in said reservoir 3.
  • the granules are admitted into the duct 6 as they are evacuated from the inlet opening 7 under the action of the screw 9, without being subjected directly (as in the case of a vertical or directed admission) the action of gravity as a positive means forcing the granules or the like into the inlet opening 7 (no risk of jamming).
  • the power system although associated with a device or heater, can be either integrated into the structure of the latter (in its housing or housing), or be located remotely connected to the combustion chamber from the latter by a conduit 13.
  • the propeller 9 "of the worm 9 has a structure at least partially deformable.
  • the spiral band 9 "attached to the longitudinal axis 9 'of the worm 9 to form the helix is made of an elastically deformable material , or that the helix 9 "of the worm 9 is formed by an elongate brush or linear extension spiral reported on the longitudinal axis 9 '.
  • an at least partially deformable worm 9 also increases the operating reliability of the conveying means 5 and the service life of the actuator 10, while limiting maintenance and maintenance operations, in particular particularly for the removal of accumulated dust at the storage tanks 3.
  • the actuator 10 can be in direct contact with the longitudinal axis 9 'of the screw 9 (arrangement at the upper end of the conveying means 5 - see figure 1 ) or be mounted remotely (implementation implementation of an intermediate means for transmitting the driving movement).
  • the bottom zone 3 "of the lower part 3 'of the storage tank 3 extending around the lower end 6' the tubular duct 6 of the conveying means 5 is perforated so as to form a meshed or perforated wall portion 14 adapted to retain the fragments or fuel particles having a size sufficient for conveying by the conveying means 5, the storage tank 3 showing a tapered configuration towards the bottom 3 "of said lower portion 3 '(see figures 1 and 4 ).
  • the feed system 1 may also comprise a means 15 for collecting dust and small fuel particles located at least under the screened or perforated wall portion 14 of the bottom 3 "of the lower part. 3 'of the storage tank 3, for example in the form of a removable tray.
  • the plate 11 for closing off the lower opening of the tubular duct 6 may, if necessary, also be provided with perforations for the passage of dust towards the container 15.
  • the reduction or near-elimination of dust (fines, sub-particles, grind of fuel, foreign particulate bodies) in the tank 3 facilitates the conveying of the fuel and allows a better combustion, while causing a spacing of the maintenance and emptying said tank 3.
  • the storage tank 3 (generally in the form of a box integrated in the heater 2) advantageously also has a feed opening at the top, for example closed by a pivoting flap 18, and a gauge. indicating the level of fuel in said tank, for example in the form of an elongate window shaped vertical transparent slot 19 present in an apparent face.
  • the subject of the invention is also, as partially shown by Figures 1A and 1B , a device or apparatus for heating 2 by combustion of fragmented solid fuel in the form of granules, chips, grains, pellets or the like, in particular of the type comprising at least one arrangement comprising a chamber of combustion 4, preferably at least partially delimited by a transparent or translucent wall 4 ', optionally a perforated pot-shaped container 16 forming a burner or furnace disposed in the bottom of the combustion chamber and open on the latter at its upper end, a lower ash recovery compartment 17 located beneath the burner or under the combustion chamber and a fuel storage tank 3 disposed or not in the vicinity of the combustion chamber 4.
  • this device or device 2 is characterized in that it comprises a feed system 1 as described above, preferably feeding the combustion chamber from above and falling pellets under the action of gravity in the room.
  • the conveying means 5 formed by the association may have a substantially vertical (space saving), steeply inclined (60 ° to 85 ° relative to the horizontal) or weakly inclined (approximately 45 °), the tank 3 also indicating a vertically elongated shape, located laterally with respect to the arrangement [combustion chamber 4 / burner 16 / ash recovery compartment 17].
  • the heating device incorporating the supply system 1 according to the invention may for example consist of a heating device corresponding to that described and represented by the patent application. French No. 09 54309 of June 24, 2009, on behalf of the plaintiff.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Solid-Fuel Combustion (AREA)
EP10305679A 2009-06-24 2010-06-24 Brennstoffversorgungssystem für einen Stückigbrennstoff-Heizkessel Withdrawn EP2267364A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0954324A FR2947327B1 (fr) 2009-06-24 2009-06-24 Systeme d'alimentation pour appareil de chauffage a combustible solide fragmente

Publications (1)

Publication Number Publication Date
EP2267364A1 true EP2267364A1 (de) 2010-12-29

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Family Applications (1)

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EP10305679A Withdrawn EP2267364A1 (de) 2009-06-24 2010-06-24 Brennstoffversorgungssystem für einen Stückigbrennstoff-Heizkessel

Country Status (2)

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EP (1) EP2267364A1 (de)
FR (1) FR2947327B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITVI20130176A1 (it) * 2013-07-10 2015-01-11 Cs Thermos S R L Apparecchio di riscaldamento funzionante a combustibile solido
WO2018021902A1 (ru) * 2016-07-25 2018-02-01 Виктор МАНАСТЫРЛЫ Отопительный котел

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201900002363A1 (it) * 2019-02-18 2020-08-18 Gruppo Piazzetta Spa Gruppo generatore di calore

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1669635A (en) * 1926-03-24 1928-05-15 William M Thomas Powdered-coal feeder
DE9218953U1 (de) 1991-02-19 1996-05-23 Riener Karl Stefan Ofen für feste Brennstoffe, insbesondere Pellets
EP1327825A1 (de) 2002-01-10 2003-07-16 Gruppo Piazzetta S.p.A. Ofen für Brennstoffpellets
DE202004014608U1 (de) * 2004-09-10 2004-12-16 Fritsch, Richard Zweiteilige Einschubschnecke zum Befüllen von Verbrennungsanlagen mit verschiedensten Brennstoffen
AT7705U1 (de) * 2004-07-27 2005-07-25 Froeling Heizkessel Und Behael Vorrichtung zum beschicken von feuerungen, z.b. von heizungen mit festen brennstoffen
EP1783424A2 (de) * 2005-11-02 2007-05-09 Hollensen Energy A/S Système de transport de biomasse et installation de combustion pour biocombustible

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1669635A (en) * 1926-03-24 1928-05-15 William M Thomas Powdered-coal feeder
DE9218953U1 (de) 1991-02-19 1996-05-23 Riener Karl Stefan Ofen für feste Brennstoffe, insbesondere Pellets
EP1327825A1 (de) 2002-01-10 2003-07-16 Gruppo Piazzetta S.p.A. Ofen für Brennstoffpellets
AT7705U1 (de) * 2004-07-27 2005-07-25 Froeling Heizkessel Und Behael Vorrichtung zum beschicken von feuerungen, z.b. von heizungen mit festen brennstoffen
DE202004014608U1 (de) * 2004-09-10 2004-12-16 Fritsch, Richard Zweiteilige Einschubschnecke zum Befüllen von Verbrennungsanlagen mit verschiedensten Brennstoffen
EP1783424A2 (de) * 2005-11-02 2007-05-09 Hollensen Energy A/S Système de transport de biomasse et installation de combustion pour biocombustible

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITVI20130176A1 (it) * 2013-07-10 2015-01-11 Cs Thermos S R L Apparecchio di riscaldamento funzionante a combustibile solido
EP2824049A1 (de) * 2013-07-10 2015-01-14 CS THERMOS s.r.l. Festbrennstoffheizvorrichtung
WO2018021902A1 (ru) * 2016-07-25 2018-02-01 Виктор МАНАСТЫРЛЫ Отопительный котел

Also Published As

Publication number Publication date
FR2947327A1 (fr) 2010-12-31
FR2947327B1 (fr) 2012-12-07

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