EP2562478A2 - Dispositif d'acheminement de combustible pour un four - Google Patents

Dispositif d'acheminement de combustible pour un four Download PDF

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Publication number
EP2562478A2
EP2562478A2 EP12006049A EP12006049A EP2562478A2 EP 2562478 A2 EP2562478 A2 EP 2562478A2 EP 12006049 A EP12006049 A EP 12006049A EP 12006049 A EP12006049 A EP 12006049A EP 2562478 A2 EP2562478 A2 EP 2562478A2
Authority
EP
European Patent Office
Prior art keywords
fuel
collecting
delivery device
reservoir
fuel delivery
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Withdrawn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
EP12006049A
Other languages
German (de)
English (en)
Other versions
EP2562478A3 (fr
Inventor
Karl Stefan Riener
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2562478A2 publication Critical patent/EP2562478A2/fr
Publication of EP2562478A3 publication Critical patent/EP2562478A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F23K3/18—Spreader stokers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/54—Large containers characterised by means facilitating filling or emptying
    • B65D88/64—Large containers characterised by means facilitating filling or emptying preventing bridge formation
    • B65D88/68—Large containers characterised by means facilitating filling or emptying preventing bridge formation using rotating devices
    • 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
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2203/00—Feeding arrangements
    • F23K2203/10—Supply line fittings
    • F23K2203/103—Storage devices
    • 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
    • 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 invention relates to a Brennsch tinyvoriques for a furnace.
  • the invention relates to a fuel delivery device for conveying a mechanically recoverable solid fuel, in particular pellets.
  • Pellets are typically and principally made of crushed wood, pressed normalized or certified fuels produced from chips and / or sawdust which are to meet certain requirements in terms of size, size, conveyability and in terms of the lowest possible release of pollutants during combustion.
  • the EP 1 826 488 A1 describes a Brennstoff toovoriques for a furnace comprising a vertically arranged in a container screw conveyor, which conveys the fuel, ie the pellets against gravity upwards and discharges into a side of the screw conveyor arranged and radially outwardly and obliquely downwardly extending downpipe. About this downpipe from the container upwardly promoted pellets are discharged into a combustion chamber of the furnace.
  • the object of the invention is to provide an improved fuel delivery device of the type mentioned.
  • the invention provides a fuel delivery device according to the subject-matter of independent claim 1.
  • Another aspect of the invention is on an oven with a Brennstoffneckvoroplasty according to the subject of independent claim 15 directed. Further aspects and embodiments of the invention will become apparent from the dependent claims, the following description and the drawings.
  • the invention provides a fuel delivery device for a furnace for delivering a mechanically recoverable solid fuel, in particular pellets.
  • the Brennstoff ancientvoriques comprises a screw conveyor, which is arranged vertically, a reservoir for receiving a supply of the mechanically recoverable fuel, which is bounded on its underside by a bottom, and a drive for a rotary drive of the screw conveyor.
  • the auger is arranged vertically and provided for conveying the fuel from the reservoir from an area near the bottom of the reservoir upwards.
  • a collecting device which has one or more of the screw conveyor radially outwardly extending collecting arms, which are driven in rotation over the bottom of the reservoir and are formed in the direction of a displacement of the fuel radially inwardly toward the screw conveyor curved ,
  • an intermediate floor is provided at a distance above the bottom of the reservoir, which separates a collecting space located below thereof from an upstream storage space and the one or more openings for the passage of fuel from the storage space down into the collecting space has, wherein the collecting device is arranged in the collecting space below the false floor.
  • a fuel delivery device for a furnace which is provided for conveying a mechanically recoverable solid fuel, in particular pellets.
  • This comprises a screw conveyor 11, which is arranged vertically within a reservoir 15.
  • the term "vertical” also includes a substantially vertical or substantially vertical arrangement with respect to the earth's surface within the usual tolerances.
  • the Brennstoffnachvoriques may be formed as an integral part of the furnace or as a separate unit.
  • the storage container 15 serves to receive a supply of the mechanically recoverable fuel, ie in particular of pellets, and is bounded on a lower side by a bottom 16b.
  • a drive 19 for a rotary drive of the screw conveyor 11 is provided at the top of the screw conveyor 11.
  • the screw conveyor 11 is provided for conveying the fuel from the reservoir 15, namely, from an area near the bottom 16b thereof against gravity upward.
  • a collecting device which has one or more of the screw conveyor 11 radially outwardly extending collecting arms 18.
  • the collecting arms 18 are rotatably driven via the bottom 16b of the reservoir 15 and they are formed in the direction of a displacement of the fuel radially inwardly toward the screw conveyor 11 towards curved.
  • the at least one collecting arm of the collecting device may have such a curvature, which is tuned to the screw conveyor or on the conveying speed, that the conveying speed of the screw conveyor is greater than the speed at which the collecting device displaces the fuel radially inwardly.
  • the collecting device may comprise two collecting arms, which are arranged diametrically opposite each other. Of course, a different number of collecting arms can be provided.
  • the collecting arms may have a crescent shape, seen in the direction parallel to the auger on the collecting arms.
  • the one or more collection arms may be formed of a flat plate-shaped material or of a metal sheet.
  • the fuel delivery device may be provided at a distance above the bottom of the reservoir an intermediate bottom, which divides a located below the same collecting space from a storage space located above the same and having one or more openings, which is for the passage of Firing agent are provided from the storage space down into the plenum, wherein the collecting device is arranged in the plenum below the false floor.
  • the collecting space may be smaller in area than the container cross-section and, in one embodiment, be designed to be conically tapered.
  • the aforementioned openings may be provided in the intermediate bottom in the outer peripheral region of the or the collecting arms.
  • the collecting space may be circumferentially bounded by a wall, wherein the openings are provided for the passage of the fuel on the one hand in the outer peripheral region of the collecting arm and on the other hand near the collecting space circumferentially bounding wall.
  • the openings in the intermediate bottom of the reservoir can be dimensioned so that among them in the peripheral region of the collecting arms or bulk material of the flowing through the openings in the intermediate bottom flowing down fuel, which are completely or partially removed by the or the collecting arms and radially inwardly displaced.
  • the reservoir of the reservoir can have a greater lateral extent than the plenum, and from the reservoir to the plenum can be provided down a funnel or cone-shaped transition.
  • a downwardly inclined and downwardly inclined downpipe can be provided, through which out of the screw conveyor upwardly conveyed fuel can be discharged to the outside to a combustion chamber of the furnace.
  • the reservoir has a basic shape in which the length and width of the cross-section are approximately equal, because the underlying collection arms rotate preferably circular and thus cover a circular area.
  • the container has a square or circular cross-section.
  • the reservoir has in plan view a polygonal, in particular an octagonal shape.
  • the reservoir can be made of sheet steel.
  • the collecting device of the illustrated Brennstoffssenvoriques has two respect to each other diametrically arranged collecting arms 18 which seen in plan view, ie in the direction parallel to the axis of the screw conveyor 11, have a crescent shape.
  • These collection arms 18 are made of a flat plate-shaped material or of a metal sheet.
  • the curvature of the collecting arms 18 is so dimensioned and tuned to the conveying speed of the screw conveyor 11 that the speed at which the auger 11, the fuel, ie the pellets, promotes upward away, is greater than the speed at which the collecting arms 18th move the pellets radially inward towards the auger.
  • the screw conveyor 11 comprises a tube 12 within which a helical coil 14 is mounted on a shaft 13 which is driven in rotation by the drive 19.
  • the drive 19 is typically an electric motor drive, for example a motor, which is coupled to the shaft 13 via a reduction gear.
  • the collecting arms 18 of the collecting device are connected directly to the shaft 13 of the screw conveyor 11 in the embodiment shown. Like the cross-section of Fig. 1a ), the collecting arms 18 are arranged offset from each other in height. With respect to the helix 14 of the screw conveyor 11, the collecting arms 18 are arranged in height so that taken from the collecting arms 18 inwardly displaced pellets quickly from the coil 14 of the screw conveyor 11 and conveyed away upwards. The fact that the conveying speed of the screw conveyor 11 is greater than the speed at which the collecting arms displace the pellets radially inwardly prevents jamming or wedging of pellets in the region of the screw conveyor 11.
  • FIG. 1a and b) further show, at a distance above the bottom 16b of the storage container 15, an intermediate bottom 17 is provided, which separates a collecting space 15b located below from an upstream storage space 15a and which has a plurality of openings 17a (see FIG Fig. 1b ) for the passage of fuel pellets from the reservoir 15a down into the plenum 15b has.
  • the openings 17a which are located in the region of the outer periphery of the collecting arms 18, are distributed over the circumference, as in Fig. 1b ).
  • the collecting space 15b is bounded at its periphery by a wall 16b.
  • the openings 17a for the passage of the fuel are located on the one hand near the outer periphery of the collecting arms 18, but within the range within which the collecting arms 18, can detect the pellets drizzled through the openings 17a, and on the other hand also near the wall 16b of the collecting space 15b ,
  • the openings 17a in the intermediate bottom 17 are dimensioned so that in the circumferential detection range of the collecting arms 18 bulk cone of the fuel, ie the down through the openings 17a drizzle down pellets formed by the collecting arms 18 more or less completely removed and radially inwardly displaced or conveyed to the auger 11.
  • the storage space 15a of the storage container 15 above the intermediate bottom 17 has a larger lateral extent than the collecting space 15b under the intermediate bottom 17. In between, a funnel-shaped or cone-shaped transition 16a is provided.
  • the reservoir 15 has in the embodiment shown in plan view a polygonal, namely an octagonal shape, and is made of sheet steel.
  • the radial extent of the collection arms 18 is matched to the size of the collection space 15b such that the fuel sprayed down through the openings 17a and forming the aboveground cones can be reliably detected and displaced radially inwards without leaving "dead areas" or areas, in which fuel can accumulate or become wedged.
  • Fig. 2 shows a perspective view in a partially sectioned view of the Brennstoff tinyvoriques the Fig. 1 ,

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
EP12006049.6A 2011-08-24 2012-08-24 Dispositif d'acheminement de combustible pour un four Withdrawn EP2562478A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011111753A DE102011111753A1 (de) 2011-08-24 2011-08-24 Brennmittelfördervorrichtung für einen ofen

Publications (2)

Publication Number Publication Date
EP2562478A2 true EP2562478A2 (fr) 2013-02-27
EP2562478A3 EP2562478A3 (fr) 2015-08-12

Family

ID=46826189

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12006049.6A Withdrawn EP2562478A3 (fr) 2011-08-24 2012-08-24 Dispositif d'acheminement de combustible pour un four

Country Status (2)

Country Link
EP (1) EP2562478A3 (fr)
DE (1) DE102011111753A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3085991A1 (fr) * 2015-04-22 2016-10-26 Johnson Electric Germany GmbH & Co. KG Convoyeur a pellets et poeles a pellets

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1826488A1 (fr) 2006-02-24 2007-08-29 Karl Stefan Riener Dispositif d'alimentation en combustible

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1857354A (en) * 1926-07-29 1932-05-10 William B Chapman Underfeed mechanism for fuel beds
FR1367134A (fr) * 1963-08-12 1964-07-17 Reit Holzverwertungsanlagen K Dispositif pour l'évacuation de copeaux de bois, de cosses, et de produits analogues, d'un silo
FI874889A0 (fi) * 1987-11-05 1987-11-05 Ahlstroem Oy In- och utmatningsanordning foer silor.
FR2664576B1 (fr) * 1990-07-13 1995-09-01 Transitube Project Dispositif elevateur flexible de produits divises et applications.
SE9903777L (sv) * 1999-10-20 2001-01-29 Energifraagan Ab Matningsanordning med vertikal skruvmatare för en brännare av partikelgods och kamin med sådan matningsanordning
DE102007010917A1 (de) * 2007-03-05 2008-09-11 Viessmann Werke Gmbh & Co Kg Dosiervorrichtung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1826488A1 (fr) 2006-02-24 2007-08-29 Karl Stefan Riener Dispositif d'alimentation en combustible

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3085991A1 (fr) * 2015-04-22 2016-10-26 Johnson Electric Germany GmbH & Co. KG Convoyeur a pellets et poeles a pellets

Also Published As

Publication number Publication date
DE102011111753A1 (de) 2013-02-28
EP2562478A3 (fr) 2015-08-12

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