WO2000075563A1 - Bruleur destine a la combustion de combustibles solides - Google Patents

Bruleur destine a la combustion de combustibles solides Download PDF

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Publication number
WO2000075563A1
WO2000075563A1 PCT/SE2000/001143 SE0001143W WO0075563A1 WO 2000075563 A1 WO2000075563 A1 WO 2000075563A1 SE 0001143 W SE0001143 W SE 0001143W WO 0075563 A1 WO0075563 A1 WO 0075563A1
Authority
WO
WIPO (PCT)
Prior art keywords
cartridge
air
burner according
fuel
cavity
Prior art date
Application number
PCT/SE2000/001143
Other languages
English (en)
Inventor
Erik Pettersson
Original Assignee
Erik Pettersson
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 Erik Pettersson filed Critical Erik Pettersson
Priority to CA002371544A priority Critical patent/CA2371544C/fr
Priority to AU54359/00A priority patent/AU5435900A/en
Priority to DE60010073T priority patent/DE60010073T2/de
Priority to EP00939238A priority patent/EP1183481B1/fr
Priority to DK00939238T priority patent/DK1183481T3/da
Priority to AT00939238T priority patent/ATE265020T1/de
Publication of WO2000075563A1 publication Critical patent/WO2000075563A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B1/00—Combustion apparatus using only lump fuel
    • F23B1/16—Combustion apparatus using only lump fuel the combustion apparatus being modified according to the form of grate or other fuel support
    • F23B1/26—Combustion apparatus using only lump fuel the combustion apparatus being modified according to the form of grate or other fuel support using imperforate fuel supports
    • 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

Definitions

  • This invention relates to a burner for the burning of solid fuels, such as pellets, comprising a cartridge that may be inserted into a central heater, said cartridge delimiting a combustion chamber that is open relative to the interior of the heater and having a bottom, below which there is at least one cavity that is open outwardly, from the central heater, but closed inwardly, to which cavity air may be supplied from outside, the bottom along opposing longitudinal sides transposing into protruding side walls, in whicn there are orifices for the supply of air from the cavity into the combustion chamber, so as to create of a combustible gas mixture together with gasified constituents from a glow hearth located on said bottom, to which hearth fuel is supplied from above via a fuel feed canal.
  • PCT/DK83/00114 which describes a burner of the type as generally defme ⁇ in tne introduction.
  • the necessary air is supplied to the combustion chamber via a number of small orifices, which are provided solely in the side walls of the cartridge and distributed substantially evenly along their entire length. This involves that the supply of oxygen-rich air to the inte- rior of the glow hearth becomes mediocre.
  • the present invention aims at removing the above mentioned inconveniences of previously known burners for burning solid fuels and creating an improved burner.
  • a primary object of the invention is to provide a burner with the capability of on one hand supplying optimal amounts of oxygen-rich air to the interior of an established glow hearth, and on the other hand homogenizing the gas mixture composed of gasified fuel constituents and incoming secondary air and guaranteeing a comparatively long dwell time for it, in the combustion chamber.
  • Yet another object is to provide a burner that is constructively simple and cheap to manufacture, at the same time as it should be compact, i.e., occupying a minimum of space in connection with a central heater.
  • Fig 1 is a schematic section through a central heater and a burner according to the invention connected thereto,
  • Fig 2 is a schematic section showing only the burner, in enlarged scale
  • Fig 3 is a partly transparent perspective view of the burner in a still more enlarged scale
  • Fig 4 is a perspective exploded view showing different components comprised in the burner.
  • reference numeral 1 designates a central heater with an internal combustion chamber 2 and an outlet 3 for flue gasses.
  • a burner according to the invention designated 6 in its entirety.
  • this burner comprises a cartridge 7 that may be inserted into the central heater, which cartridge delimits combustion chamber 8, that is open relative to the interior of the heater and is composed of an upper part 9 and a lower part 10.
  • the cartridge lower part 10 consists of a box construction that is open outwardly from the heater, but closed inwardly, with a lying central bottom 11 and two side walls 12 protruding from said bottom, in which side walls are orifices for the supply of air into the combustion chamber.
  • the box construction 10 also comprises a secondary bottom 13 located at a level below the bottom 11.
  • the secondary bottom 13 transposes into two vertical side pieces 14, which at their tops transpose into planar, horizontal portions 15, which in turn at inner edges transpose into the side walls 12.
  • the side walls 12 are advantageously inclined (in a direction upwards/outwards) in order to form a trough- or groove-shaped configuration together with the planar horizontal bottom 11.
  • the parts 11, 12, 13, 14 and 15 together delimit a cross-sectionally substantially U-shaped cavity 33 (see Fig 2) which at an inner end is closed by means of a gable wall 16. However, at its opposed end, the cavity is open.
  • the burner is substantially pre- viously disclosed in the above-mentioned PCT/DK83/00114.
  • the cartridge 7 is detachably connected with an outer housing 17 which, when mounted, is located on the outside of the central heater. More specifically, the lower part 10 of the cartridge is introduced into a first opening 18 (see Fig 4) m a front wall 19 of the housing 17. Outwardly from the vertical front wall 19 extends a cross-sectionally quadrangular cover with two vertical side walls 20 and two horizontal upper and lower walls 21, 22. These walls are jointly connected with an outer, vertical wall 23, on which is mounted a fan 24 for blowing in air into the interior of the housing. Through the interior of the housing extends a tube 25 which forms a fuel feed canal, whose one, upper end transposes into a vertical tube socket 26, to which a suitable fuel supply conduit, e.g.
  • a suitable fuel supply conduit e.g.
  • a hose may be connected.
  • the opposing end of the fuel feed canal ends in an opening 27 in the front wall 19 of the housing 17. More particularly, the inlet opening 27 is placed centrally, immediately above the opening 18, into which the cartridge lower part 10 is mtro- symbolized.
  • the tube 25, which is inclined at a suitable angle, e.g. 45 , between its opposed openings, may advantageously have a rectangular cross-sectional shape, in order to form a shaft, through which solid fuel bodies, such as pellets, may without any resistance fall or slide onto the cartridge bottom 11. It should be observed that the tube 25 at its opposed ends is air-proof-connected to the walls 19 and 21, respectively. In other words, air from the interior of the housing 17 cannot penetrate into the tube 25.
  • the air supply orifices n the cartridge lower part 10 have the shape of elongated slots 28 placed m the region between the central bottom plate 11 and each individual side wall 12. More specifically, the individual slot 28 has a first portion recessed in the bottom plate 11 per se and a second portion recessed in the adjacent side wall 12. As may be clearly seen in Fig 3, each one of the slots 28 is oblique relative to the axial extension of the cartridge.
  • the bottom 11 and the side walls 12, respectively may be made of 2 mm thick sheet metal and the individual slot 28 may have a width of 2 to 2,5 mm and a total length of about 20 to 40 mm, suitably about 30 mm, it being most suitable that about 2/3 of the total length is comprised in the bottom plate 11, while 1/3 is comprised in the adjacent side wall.
  • a vertical wall 29 At a certain distance inside the outer end of the cartridge lower part 10, is provided a vertical wall 29 whose upper edge is situated on the same level as the upper planar portions 15 of the cartridge lower part.
  • the slots 28 are provided only along a restricted region of the entire length of the bottom plate 11. More specifically, the slots are arranged m a region adjacent to the air-intercepting wall 29. In prac- tice, the length of this region may lie within the range of 25 to 50%, suitably about 33% of the distance between the wall 29 and the opposed gable wall 16.
  • the section of the bottom plate 11 that extends between the innermost slot 28 and the gable wall 16, is devoid of any sort of holes.
  • each side wall 12 is recessed at least one orifice 30 that is located relatively near the inner free end of the cartridge lower part. Tertiary air may be supplied to the gas mixture in the combustion chamber through this orifice 30.
  • the length of the bottom plate 11 - when calculated between the two walls 16, 29 - may lie within the range of 150 to 300 mm, e.g. 200 mm, and the width of the bottom plate may amount to 40 to 90 mm, e.g. 50 to 60 mm.
  • two holes in the shape of tube pieces 31 are provi- ded on either side of the fuel feed inlet opening 27, for the supply of air into the combustion chamber 8.
  • an overpressure is created m the interior of housing 17, whereby air will pass through the tube pieces 31 while creating substantially axial air jets m the combustion cham- ber.
  • the upper part 9 of the cartridge 7 is cross-sectionally arched.
  • a central part is semi-circ ⁇ larly arched, the semi-circle shape transposing into planar, vertical side pieces of limited height.
  • the upper part 9 is detachably connected with the lower part 10 by means of suitable means that are not shown in more detail.
  • an upwardly facing, central edge 32 of the gable wall 16 is located somewhat higher than the bottom plate 11.
  • the protruding part of the gable wall 16 forms a stop that counteracts the falling down of fuel from the bottom plate 11.
  • the portions of the slots 28 being comprised m the bottom plate 11 will substantially supply primary air that penetrates through the glow heartn in a direction from below, while the air that is pressed in through the portions of the slots being comprised m the side walls, mainly forms secondary air which partly penetrates the glow hearth and partly sweeps frontwards along the top side of the glow hearth.
  • Performed tests have shown that the air that penetrates through the slots 28 forms mutually independent, rotating vortices which, when having passed the glow hearth (i.e., the solid fuel during pyrolysis), consist of combustible gas. By setting the vortices into rotation, the gasses are well mixed with each other, at the same time as the rotary motion cares for a comparatively long dwell time in the combustion chamber.
  • the air jets led in via the tube pieces 31 bring about an ejector effect that counteracts an erroneous direction of flow of the gas mixture. In other words, these air jets counteract a back burning in the burner.
  • the cap-like upper part 9 of the cartridge guarantees that the gas mixture obtained at the outer end of the combustion chamber may rotate at a smallest possible resistance.
  • the upper part 9 may advantageously be made of simple sheet metal. Numerous tests have shown that the most apparent advantage of the burner according to the invention consists in the fact that the combustion of the solid fuel becomes substantially complete. This involves that the efficiency of the burner becomes high, at the same time as the formation of ashes and soot is reduced to a minimum. Another advantage is that the burner by its constructive simplicity may be produced at low cost. At the same time, required service may be performed in a smooth way; primarily due to the fact that the cartridge that delimits the combustion chamber is detachably connected to the external housing through which fuel and air supply is made.
  • the cartridge that delimits the combustion chamber may be modified in many ways with reference to its shape and dimensions.
  • the cartridge instead of assembling the cartridge of two mutually detachably connected pieces, it is possible to make the cartridge as one single integrated, tube-like sleeve, on whose bottom side the necessary free space is provided for the air supply via the oblique slots.
  • the bottom in the cartridge, on which the glow hearth rests, also does not need to be planar, and the adjoining side walls may be shaped in another way than as planar plates or walls.
  • the cartridge it is possible to form the cartridge as a cylindrical or cross-sectionally oval tube, in which two sets of slots are provided on either side of a central, vaulted bottom.
  • the slots independently of the geometrical shape of the cartridge bottom, the slots should have their outer ends located higher than the inner ends in order to care for the in-blowing of primary air from below as well as secondary air from the side.
  • the cartridge m its entirety may be permanently joined to the external housing.

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)
  • Combustion Of Fluid Fuel (AREA)
  • Gas Burners (AREA)
  • Air Supply (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Abstract

La présente invention concerne un brûleur destiné à la combustion de combustibles solides, qui comprend une cartouche (7) pouvant être insérée dans un appareil générateur de chaleur central, cartouche qui délimite une chambre de combustion (8). Des orifices d'alimentation en air formés dans la partie inférieure (11) de la cartouche possèdent la forme de fentes allongées (28) en oblique vers l'intérieur et vers l'avant, chacune s'étendant d'un côté un peu le long de la partie inférieure et d'un autre côté, un peu vers le haut le long d'une paroi latérale adjacente (12). Les fentes (28) sont placées dans une zone adjacente à une ouverture (27) d'alimentation en combustible et elles sont destinées à fournir l'air primaire et l'air secondaire à un foyer incandescent situé sur la partie inférieure (11).
PCT/SE2000/001143 1999-06-04 2000-06-02 Bruleur destine a la combustion de combustibles solides WO2000075563A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CA002371544A CA2371544C (fr) 1999-06-04 2000-06-02 Bruleur destine a la combustion de combustibles solides
AU54359/00A AU5435900A (en) 1999-06-04 2000-06-02 Burner for the burning of solid fuels
DE60010073T DE60010073T2 (de) 1999-06-04 2000-06-02 Brenner zur verbrennung von festen brennstoffen
EP00939238A EP1183481B1 (fr) 1999-06-04 2000-06-02 Bruleur destine a la combustion de combustibles solides
DK00939238T DK1183481T3 (da) 1999-06-04 2000-06-02 Brænder til forbrænding af faste brændstoffer
AT00939238T ATE265020T1 (de) 1999-06-04 2000-06-02 Brenner zur verbrennung von festen brennstoffen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9902068A SE514364C2 (sv) 1999-06-04 1999-06-04 Brännare för förbränning av fasta bränslen
SE9902068-7 1999-06-04

Publications (1)

Publication Number Publication Date
WO2000075563A1 true WO2000075563A1 (fr) 2000-12-14

Family

ID=20415897

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2000/001143 WO2000075563A1 (fr) 1999-06-04 2000-06-02 Bruleur destine a la combustion de combustibles solides

Country Status (8)

Country Link
EP (1) EP1183481B1 (fr)
AT (1) ATE265020T1 (fr)
AU (1) AU5435900A (fr)
CA (1) CA2371544C (fr)
DE (1) DE60010073T2 (fr)
DK (1) DK1183481T3 (fr)
SE (1) SE514364C2 (fr)
WO (1) WO2000075563A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002079693A1 (fr) * 2001-03-29 2002-10-10 Oy Ht Engineering Ltd Bruleur de granules
WO2004111535A1 (fr) * 2003-06-19 2004-12-23 Ht Lasertekniikka Oy Bruleur destine a des boulettes
WO2010147539A1 (fr) * 2009-06-18 2010-12-23 Ekosystem I Gävle Ab Brûleur pour combustibles solides, ayant des moyens pour délivrer en sortie des cendres
FR2961582A1 (fr) * 2010-06-18 2011-12-23 Electricite De France Bruleur anti-machefer
AT508338B1 (de) * 2010-07-29 2012-03-15 Johann Perhofer Brenner für feststoffe
EP2458274A1 (fr) * 2010-11-29 2012-05-30 Linka Maskinfabrik A/S Brûleur
US20140208996A1 (en) * 2011-09-02 2014-07-31 Hongfeng Zhu High performance burner
EP2400217A3 (fr) * 2010-06-22 2016-01-20 Alley Enterprises Limited Brûleur fermé pour brûler du combustible granulaire
EP3124865A1 (fr) * 2014-08-12 2017-02-01 Suirvale Developments Limited t/a Wood Energy Solutions Couvercle d'une chaudière de biomasse d'extérieur
IT201700018014A1 (it) * 2017-02-17 2018-08-17 Ar Ca S R L Caldaia per la combustione di biomasse granulari.
US10859259B2 (en) 2018-10-17 2020-12-08 Logan Outdoor Products, Llc Burner housing for a pellet grill

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPN20130030U1 (it) * 2013-09-25 2015-03-26 Mcz Group S P A Braciere perfezionato in particolare per stufe a pellet

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4181082A (en) * 1977-06-17 1980-01-01 Hans Grossniklaus Solid fuel furnace
WO1984002385A1 (fr) * 1982-12-08 1984-06-21 Dan Trim Aps Maskinfab Chargeur automatique de combustible solide
DE3247484A1 (de) * 1981-07-04 1984-06-28 Gebrüder Welger GmbH & Co KG, 3340 Wolfenbüttel Feuerungsanlage fuer stroh oder aehnliches material
FR2571474A1 (fr) * 1984-10-04 1986-04-11 Dupuis Jacques Bruleur a combustible solide pour chaudiere
FR2671166A1 (fr) * 1990-12-28 1992-07-03 Biomasse Normandie Assoc Rgle Chaufferie specialement concue pour la combustion de bois dechiquete.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4181082A (en) * 1977-06-17 1980-01-01 Hans Grossniklaus Solid fuel furnace
DE3247484A1 (de) * 1981-07-04 1984-06-28 Gebrüder Welger GmbH & Co KG, 3340 Wolfenbüttel Feuerungsanlage fuer stroh oder aehnliches material
WO1984002385A1 (fr) * 1982-12-08 1984-06-21 Dan Trim Aps Maskinfab Chargeur automatique de combustible solide
FR2571474A1 (fr) * 1984-10-04 1986-04-11 Dupuis Jacques Bruleur a combustible solide pour chaudiere
FR2671166A1 (fr) * 1990-12-28 1992-07-03 Biomasse Normandie Assoc Rgle Chaufferie specialement concue pour la combustion de bois dechiquete.

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002079693A1 (fr) * 2001-03-29 2002-10-10 Oy Ht Engineering Ltd Bruleur de granules
WO2004111535A1 (fr) * 2003-06-19 2004-12-23 Ht Lasertekniikka Oy Bruleur destine a des boulettes
WO2010147539A1 (fr) * 2009-06-18 2010-12-23 Ekosystem I Gävle Ab Brûleur pour combustibles solides, ayant des moyens pour délivrer en sortie des cendres
FR2961582A1 (fr) * 2010-06-18 2011-12-23 Electricite De France Bruleur anti-machefer
EP2400217A3 (fr) * 2010-06-22 2016-01-20 Alley Enterprises Limited Brûleur fermé pour brûler du combustible granulaire
AT508338B1 (de) * 2010-07-29 2012-03-15 Johann Perhofer Brenner für feststoffe
EP2458274A1 (fr) * 2010-11-29 2012-05-30 Linka Maskinfabrik A/S Brûleur
WO2012073157A1 (fr) 2010-11-29 2012-06-07 Linka Maskinfabrik A/S Brûleur
US20130276681A1 (en) * 2010-11-29 2013-10-24 Linka Maskinfabrik A/S Burner
US10415821B2 (en) 2010-11-29 2019-09-17 Linka Maskinfabrik A/S Burner
US20140208996A1 (en) * 2011-09-02 2014-07-31 Hongfeng Zhu High performance burner
EP3124865A1 (fr) * 2014-08-12 2017-02-01 Suirvale Developments Limited t/a Wood Energy Solutions Couvercle d'une chaudière de biomasse d'extérieur
IT201700018014A1 (it) * 2017-02-17 2018-08-17 Ar Ca S R L Caldaia per la combustione di biomasse granulari.
US10859259B2 (en) 2018-10-17 2020-12-08 Logan Outdoor Products, Llc Burner housing for a pellet grill

Also Published As

Publication number Publication date
AU5435900A (en) 2000-12-28
SE9902068L (sv) 2000-12-05
DE60010073T2 (de) 2005-06-30
SE514364C2 (sv) 2001-02-12
DE60010073D1 (de) 2004-05-27
DK1183481T3 (da) 2004-06-21
SE9902068D0 (sv) 1999-06-04
EP1183481B1 (fr) 2004-04-21
EP1183481A1 (fr) 2002-03-06
CA2371544C (fr) 2010-03-09
CA2371544A1 (fr) 2000-12-14
ATE265020T1 (de) 2004-05-15

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