EP2226558B1 - Brûleur pour poêle alimenté en combustibles solides - Google Patents

Brûleur pour poêle alimenté en combustibles solides Download PDF

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Publication number
EP2226558B1
EP2226558B1 EP10155693.4A EP10155693A EP2226558B1 EP 2226558 B1 EP2226558 B1 EP 2226558B1 EP 10155693 A EP10155693 A EP 10155693A EP 2226558 B1 EP2226558 B1 EP 2226558B1
Authority
EP
European Patent Office
Prior art keywords
burner
brazier
grid
spatula
elements
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
EP10155693.4A
Other languages
German (de)
English (en)
Other versions
EP2226558A1 (fr
Inventor
Fabio Rossi
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.)
THERMOROSSI SpA
Original Assignee
THERMOROSSI SpA
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Publication date
Application filed by THERMOROSSI SpA filed Critical THERMOROSSI SpA
Priority to SI201031213A priority Critical patent/SI2226558T1/sl
Publication of EP2226558A1 publication Critical patent/EP2226558A1/fr
Application granted granted Critical
Publication of EP2226558B1 publication Critical patent/EP2226558B1/fr
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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
    • F23B30/00—Combustion apparatus with driven means for agitating the burning fuel; Combustion apparatus with driven means for advancing the burning fuel through the combustion chamber
    • F23B30/02—Combustion apparatus with driven means for agitating the burning fuel; Combustion apparatus with driven means for advancing the burning fuel through the combustion chamber with movable, e.g. vibratable, fuel-supporting surfaces; with fuel-supporting surfaces that have movable parts
    • F23B30/06—Combustion apparatus with driven means for agitating the burning fuel; Combustion apparatus with driven means for advancing the burning fuel through the combustion chamber with movable, e.g. vibratable, fuel-supporting surfaces; with fuel-supporting surfaces that have movable parts with fuel supporting surfaces that are specially adapted for advancing fuel through the combustion zone
    • F23B30/10—Combustion apparatus with driven means for agitating the burning fuel; Combustion apparatus with driven means for advancing the burning fuel through the combustion chamber with movable, e.g. vibratable, fuel-supporting surfaces; with fuel-supporting surfaces that have movable parts with fuel supporting surfaces that are specially adapted for advancing fuel through the combustion zone with fuel-supporting surfaces having fuel advancing elements that are movable, but remain essentially in the same place, e.g. with rollers or reciprocating grate bars
    • 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
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H15/00—Cleaning arrangements for grates; Moving fuel along grates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel 
    • F23L9/06—Passages or apertures for delivering secondary air for completing combustion of fuel  by discharging the air into the fire bed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
    • F24B1/00—Stoves or ranges
    • F24B1/02—Closed stoves
    • F24B1/024—Closed stoves for pulverulent fuels

Definitions

  • the present invention relates to a burner for a stove fuelled with solid fuels, in particular pellets but also for wood chips, cereals, vegetal waste in general, according to the general part of claim 1.
  • pellet solid fuel
  • the advantage of pellet over wood and coal consists in that it is much more easily managed by the manufacturer, as well as by the retailer and finally, by the end user too, since it can conveniently be arranged in bags of the desired weight and can be handled in a much easier manner compared to wood or coal.
  • the fuel is arranged in a storage space, located outside or directly inside the stove body, wherefrom it is taken, generally by a screw, to be gradually laid in the burner.
  • the pellet is fed in a substantially automated manner, unlike known solid fuels that need to be constantly put in the stove by the user, based on the combustion progress.
  • the burner further exhibits a fuel collection tank provided with a pierced bottom wherethrough the comburent air enters the combustion chamber.
  • the fuel collection tank normally exhibits a square or rectangular shape and is provided with vertical walls that delimit the brazier and are intended to containing the ashes.
  • these alternative fuels also produce substances that melt, forming a solid layer on the brazier base when they cool down: such layer adds up to unburnt products, such as salts, silicon and other impurities. thus causing the obstruction of the air passage holes on the brazier. in such an extent to extinguish the flame and thus drastically impair the stove thermal yield.
  • devices have been devised which are capable of preventing the comburent air passage holes provided on the base grid from ever being obstructed, automatically removing ash and other solid combustion products from the brazier.
  • the object of the present invention is to provide a burner for a stove fuelled with solid fuels, in particular pellet, which compared to similar burners of the known type and in particular compared to that just described, exhibits an improvement of the combustion process in terms of emissions of CO. NOx, powders and unburnt products.
  • solutions should be provided in such burner to optimise the ratio between the so-called “secondary” air” and the so-called “primary air” introduced into the burned, in order to achieve the above objects.
  • a fundamental feature of the device of the invention is that a first portion 8 provided with an upward facing concavity is provided at the centre line in longitudinal direction of the brazier. Such portion is provided with through holes 9 at the entire extension thereof and the primary air required for combustion flows out of said holes.
  • said portion 8 is transversally delimited by a pair of elements 11 obtained by a metal sheet, which project relative to the brazier surface and are curved substantially as a "V", with upward facing apex.
  • Such elements are provided with holes 12 ( fig. 7 ) at the face thereof facing the concave portion 8 and said elements surmount second portions 14 provided with holes 13 of the brazier flat surface.
  • such "V" shaped elements serve as side distributor elements for the secondary air required for the combustion process.
  • elements 11 may also be shaped as an upturned "U", according to the burner combustion power.
  • Each one of the two longitudinal partitions 10 is surmounted by a further wall 20 inclined towards the inside of the brazier, said wall having the function of facilitating the retaining of the fuel and of the burnt products within the brazier itself.
  • Wall 20 placed at the feeding conduit 21 of the fuel, pushed by screw 3. exhibits a portion 22 with a slight upward concavity for facilitating the drop of the fuel at the centre of the brazier.
  • V or "U” shaped elements that act as distribution elements does not hinder the movement of the motor-driven spatula.
  • the ash that is moved by the motor-driven spatula may go beyond said distributor elements, in particular if the fuels used are of a low quality. If on the other hand the fuel is of a high quality, the burnt residue is finely reduced by the motor-driven spatula and concurrently ejected by the presence of the primary air or made to drop in the underlying tank.
  • Said distributor elements may advantageously be made of steel, as well as of cast iron or any other metal or ceramic material capable of withstanding high operating temperatures.
  • the fundamental differences of the device of the invention compared to similar devices of the known type consist in that the primary air passage holes in the above are provided at the entire brazier surface. Furthermore with the solution just described, wherein the primary air only enters at the centre of the brazier and where the secondary air is introduced through the "V" or "U” shaped distributor elements, there occurs an optimisation of the ratio between the introduced secondary air and primary air of the burner, which is capable of considerably reducing, based on the tests performed, the combustion products, consisting in particular of Co. NOx, powders and unburnt products. At the same time. the overall thermal yield of the stove is improved compared to that of known similar stoves.
  • the device of the invention is simple from both the construction viewpoint and from the functional viewpoint, allowing the achievement of the above objects.

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)
  • Gas Burners (AREA)

Claims (3)

  1. Brûleur pour poêle alimenté en combustibles solides, en particulier des pellets, ledit brûleur comprenant un brasier (1) avec une forme sensiblement rectangulaire, dans lequel un réservoir est disposé au-dessous du brasier (1), pouvant être retiré du poêle, adapté pour permettre la collecte des produits de combustion solides du brûleur, et avec une grille sur laquelle le combustible (4) à brûler peut être disposé, le brûleur fournissant également un dispositif qui agit sur la surface du brasier et étant agencé pour nettoyer la grille de base, ledit dispositif comprenant une spatule actionnée par moteur (6) agencée au-dessus et en contact avec la grille, ladite spatule étant agencée avec un mouvement oscillant, la grille restant immobile, ladite grille étant munie de trous passants (9) pour l'air de combustion, ladite grille fournissant une première portion (8), avec une concavité orientée vers le haut et soumise à l'action de la spatule, le brûleur étant caractérisé en ce que cette première portion est délimitée en direction longitudinale, sur ses deux côtés, par deux cloisons fixes (10) et en direction transversale par une paire d'éléments (11) obtenus à partir d'une tôle, qui font saillie par rapport à la surface du brasier, qui sont incurvés sensiblement en forme de "V", avec le sommet faisant face vers le haut, ou profilés en forme de "U" à l'envers et sont munis de trous (12) au niveau de leur face faisant face à la portion concave, lesdits éléments surmontant des deuxièmes portions (14) munis de trous (13) de la surface plate du brasier, ces éléments agissant comme des éléments de distribution latéraux pour l'air secondaire nécessaire pour le processus de combustion.
  2. Brûleur selon la revendication 1, caractérisé en ce que la spatule (6) est supportée par une paire de bras verticaux (6'), munis à leur tour d'épingles horizontaux (6") insérés dans des sièges spéciaux (17) ménagés sur les cloisons latérales (10).
  3. Brûleur selon les revendications 1 et 2, caractérisé en ce que chacune des cloisons latérales (10) est surmontée par une paroi latérale inclinée (20), dans laquelle le conduit de sortie (21) du combustible solide peut conduire au-dessus d'une desdites parois inclinées (20), la cloison latérale précitée présentant une portion (22) au niveau dudit conduit avec une concavité orientée vers le haut, pour faciliter le versement du combustible solide dans le brasier.
EP10155693.4A 2009-03-06 2010-03-05 Brûleur pour poêle alimenté en combustibles solides Active EP2226558B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI201031213A SI2226558T1 (sl) 2009-03-06 2010-03-05 Gorilnik za peč na trdna goriva

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITVI2009A000048A IT1393286B1 (it) 2009-03-06 2009-03-06 Bruciatore per stufa alimentata con combustibili solidi

Publications (2)

Publication Number Publication Date
EP2226558A1 EP2226558A1 (fr) 2010-09-08
EP2226558B1 true EP2226558B1 (fr) 2016-03-30

Family

ID=41479038

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10155693.4A Active EP2226558B1 (fr) 2009-03-06 2010-03-05 Brûleur pour poêle alimenté en combustibles solides

Country Status (7)

Country Link
EP (1) EP2226558B1 (fr)
DK (1) DK2226558T3 (fr)
ES (1) ES2579216T3 (fr)
IT (1) IT1393286B1 (fr)
PL (1) PL2226558T3 (fr)
PT (1) PT2226558T (fr)
SI (1) SI2226558T1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201900025156A1 (it) 2019-12-20 2021-06-20 Thermorossi Spa Braciere per stufe alimentate a combustibile solido

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUB20160918A1 (it) * 2016-02-22 2017-08-22 Thermorossi Spa Bruciatore per apparecchi riscaldanti a combustibile solido

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB568019A (en) * 1943-06-18 1945-03-14 Charles Ellwood Holmes Improvements in and relating to furnaces, combustion chambers and the like
GB638458A (en) * 1948-02-09 1950-06-07 Edgar Harold Bracewell Improvements in domestic grates
US5617841A (en) * 1991-08-14 1997-04-08 Pyro Industries, Inc. Grate with self ignitor for burning pellet fuel
FR2688868B1 (fr) * 1992-03-17 1994-06-17 Olmotti Humbert Marin Appareil de combustion utilisant des combustibles solides et/ou liquides.
ITVI20040014A1 (it) * 2004-01-28 2004-04-28 Thermorossi Spa Bruciatore per stufe alimentari a pellets, cippato, cereali e scarti vegetali in genere

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201900025156A1 (it) 2019-12-20 2021-06-20 Thermorossi Spa Braciere per stufe alimentate a combustibile solido
EP3839339A1 (fr) 2019-12-20 2021-06-23 Thermorossi S.P.A. Grille de four pour combustible solide

Also Published As

Publication number Publication date
ES2579216T3 (es) 2016-08-08
EP2226558A1 (fr) 2010-09-08
SI2226558T1 (sl) 2016-08-31
DK2226558T3 (en) 2016-07-18
ITVI20090048A1 (it) 2010-09-07
IT1393286B1 (it) 2012-04-12
PT2226558T (pt) 2016-07-11
PL2226558T3 (pl) 2016-11-30

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