EP1427963A1 - Burning device - Google Patents

Burning device

Info

Publication number
EP1427963A1
EP1427963A1 EP02753106A EP02753106A EP1427963A1 EP 1427963 A1 EP1427963 A1 EP 1427963A1 EP 02753106 A EP02753106 A EP 02753106A EP 02753106 A EP02753106 A EP 02753106A EP 1427963 A1 EP1427963 A1 EP 1427963A1
Authority
EP
European Patent Office
Prior art keywords
component
burning device
holes
pellets
barrel
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.)
Granted
Application number
EP02753106A
Other languages
German (de)
French (fr)
Other versions
EP1427963B1 (en
Inventor
Onni Ilmari HYTÖNEN
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.)
Pieti Pauli
Original Assignee
Pieti Pauli
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 Pieti Pauli filed Critical Pieti Pauli
Publication of EP1427963A1 publication Critical patent/EP1427963A1/en
Application granted granted Critical
Publication of EP1427963B1 publication Critical patent/EP1427963B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/10—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of field or garden waste or biomasses
    • F23G7/105—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of field or garden waste or biomasses of wood waste
    • 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
    • F23B1/30—Combustion apparatus using only lump fuel characterised by the form of combustion chamber
    • F23B1/38—Combustion apparatus using only lump fuel characterised by the form of combustion chamber for combustion of peat, sawdust, or pulverulent fuel on a grate or other fuel support
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2203/00—Furnace arrangements
    • F23G2203/40—Stationary bed furnace
    • F23G2203/403—Stationary bed furnace with substantial cylindrical combustion chamber

Definitions

  • the present invention relates to a burning device and particularly to a burning device, by means of which it is possible to burn particularly wood pellets.
  • wood pellets are burned in relatively large amounts, as they have a high thermal value and are easy to use.
  • a pellet is a particle form of wooden raw material, which has been compressed mechanically to a specific hardness and to specific dimensions. Pellets are burned in many types of furnace and boiler plant, often, however, in unsatisfactory conditions, in that even combustion and optimal combustion conditions are seldom achieved.
  • pellets are burned in equipment incorporating fans, feeder devices, and similar, the plant easily becomes very expensive and complex, and is completely unsuitable for small-scale operation, such as in a conventional furnace, or, for instance, without a furnace. In such applications, the drawbacks of combustion in non-optimal conditions are aggravated.
  • the present invention is intended to create a burning device, which is particularly suitable for burning wood pellets and which can be used together with conventional furnaces, or to achieve powerful combustion and at least nearly optimal conditions in all situations in which use of the burning device according to the invention can be envisaged.
  • the device according to the invention is formed simply of two cylinders, referred to in the following as the upper cylinder 2 and the lower cylinder 4, set inside each other and able to move telescopically in relation to each other.
  • the upper cylinder 2 has a slightly smaller diameter than the lower cylinder 4, it is the inner cylinder.
  • the cylinders are mainly circular in cross-section, this is in no way essential, circular cylinders having, however, obvious advantages in this construction.
  • the lower cylinder 4 is of perforated sheet metal, or in any event of fire-resistant material.
  • the upper cylinder 2 has holes only in the lower part of its jacket surface, which is otherwise not perforated.
  • the holes in the lower part of the upper cylinder 2 are clearly larger than the holes in the lower cylinder.
  • the upper cylinder too is of a fire-resistant material.
  • the perforation is intended to permit air to flow into the inner space of the cylinders and to direct the airflow precisely to the combustion surface.
  • the lower cylinder 4 is preferably equipped with a grate 5, which is supported by suitable retainers, for example the stud-like protrusions 6 shown in the figure, in a position raised slightly above the bottom of the lower cylinder.
  • suitable retainers for example the stud-like protrusions 6 shown in the figure.
  • the grate 5 is also perforated, so that ash forming in combustion can flow through the holes into the space below the grate 5.
  • the wood pellets are marked with the reference number 7.
  • the device is made ready for use and operated as follows.
  • the lower cylinder 4 is filled suitably with wood pellets 7, for example, until it is nearly full.
  • the grate 5 is preferably attached to form the bottom of the cylinder 4.
  • the upper cylinder 2 is placed inside the lower cylinder 4. In the figure, the upper cylinder 2 does not extend very far inside the lower cylinder 4, because combustion is only just starting.
  • the lower edge of the upper cylinder rests on top of the pellets.
  • the lower edge can, if desired, include some type of flange, but good operation usually does not require this.
  • the cylinders are perforated in such way that open holes, through which combustion air enters, always run through the overlapping parts of the cylinders, the airflow being shown with the arrow 3.
  • the pellets are suitable ignited on the surface, for example, using a convenient lighter fluid, which creates even ignition over the whole area. Because a certain chimney-effect is created in the device, the combustion feeds a good airflow which in turn supports excellent combustion. As combustion progresses, and the upper edge of the charge of pellets drops, the upper cylinder, which rests on the edge, also automatically drops, so that the combustion front lowers automatically and evenly, the conditions of the actual combustion event remaining essentially unchanged.
  • the device according to the invention can be used, for example, inside a furnace, instead of the furnace being fired with split firewood or similar.
  • the device can be used placed directly on a conventional grate, or by using a suitable grate equipped with a recess.
  • the device according to the invention is also suitable for use as a camping-cooker type heat source, because as the device's dimensions are in no way restricted, it can be manufactured in either a very small size, or if desired, in a quite large size. Outdoors, it can be used as a 'lumberjack's candle' type of light source, for example, to decorate a party area.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Wood Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Solid-Fuel Combustion (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Fuel Cell (AREA)
  • Telephone Function (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)

Abstract

The device includes a barrel-like component (4), in which the pellets or similar fuel are placed. The device also includes a second, bottomless and coverless barrel component (2) fitting inside the barrel-like component and supported on the upper surface of the pellets (7), in such a way, that both components have holes in their jacket surfaces. The compositions are cylindrical and fit telescopically inside each other. The lower component pref. has a perforated grate component (5), in a position raised above the lower edge of the component.

Description

Burning Device
The present invention relates to a burning device and particularly to a burning device, by means of which it is possible to burn particularly wood pellets.
At present, wood pellets are burned in relatively large amounts, as they have a high thermal value and are easy to use. A pellet is a particle form of wooden raw material, which has been compressed mechanically to a specific hardness and to specific dimensions. Pellets are burned in many types of furnace and boiler plant, often, however, in unsatisfactory conditions, in that even combustion and optimal combustion conditions are seldom achieved.
If the pellets are burned in equipment incorporating fans, feeder devices, and similar, the plant easily becomes very expensive and complex, and is completely unsuitable for small-scale operation, such as in a conventional furnace, or, for instance, without a furnace. In such applications, the drawbacks of combustion in non-optimal conditions are aggravated.
The present invention is intended to create a burning device, which is particularly suitable for burning wood pellets and which can be used together with conventional furnaces, or to achieve powerful combustion and at least nearly optimal conditions in all situations in which use of the burning device according to the invention can be envisaged.
These and other benefits and advantages of the invention are achieved in the manner stated as characteristic in the accompanying Claims.
The following describes one preferred embodiment of the invention in greater detail, with reference to the accompanying schematic diagram showing a vertical cross-section of the device, without the invention being in any way restricted to it. The device according to the invention is formed simply of two cylinders, referred to in the following as the upper cylinder 2 and the lower cylinder 4, set inside each other and able to move telescopically in relation to each other. As the upper cylinder 2 has a slightly smaller diameter than the lower cylinder 4, it is the inner cylinder. Though the cylinders are mainly circular in cross-section, this is in no way essential, circular cylinders having, however, obvious advantages in this construction.
The lower cylinder 4 is of perforated sheet metal, or in any event of fire-resistant material. The upper cylinder 2 has holes only in the lower part of its jacket surface, which is otherwise not perforated. The holes in the lower part of the upper cylinder 2 are clearly larger than the holes in the lower cylinder. The upper cylinder too is of a fire-resistant material. The perforation is intended to permit air to flow into the inner space of the cylinders and to direct the airflow precisely to the combustion surface. By making the holes in the upper cylinder larger than those in the lower cylinder, the supply of air is ensured at all times. Air is needed precisely to maintain combustion.
The lower cylinder 4 is preferably equipped with a grate 5, which is supported by suitable retainers, for example the stud-like protrusions 6 shown in the figure, in a position raised slightly above the bottom of the lower cylinder. There is a suitable number of the studs, for example, at least three. The grate 5 is also perforated, so that ash forming in combustion can flow through the holes into the space below the grate 5. The wood pellets are marked with the reference number 7.
The device is made ready for use and operated as follows. The lower cylinder 4 is filled suitably with wood pellets 7, for example, until it is nearly full. The grate 5 is preferably attached to form the bottom of the cylinder 4. The upper cylinder 2 is placed inside the lower cylinder 4. In the figure, the upper cylinder 2 does not extend very far inside the lower cylinder 4, because combustion is only just starting. The lower edge of the upper cylinder rests on top of the pellets. The lower edge can, if desired, include some type of flange, but good operation usually does not require this.
The cylinders are perforated in such way that open holes, through which combustion air enters, always run through the overlapping parts of the cylinders, the airflow being shown with the arrow 3. The pellets are suitable ignited on the surface, for example, using a convenient lighter fluid, which creates even ignition over the whole area. Because a certain chimney-effect is created in the device, the combustion feeds a good airflow which in turn supports excellent combustion. As combustion progresses, and the upper edge of the charge of pellets drops, the upper cylinder, which rests on the edge, also automatically drops, so that the combustion front lowers automatically and evenly, the conditions of the actual combustion event remaining essentially unchanged.
Practical tests have shown the combustion to be even and complete.
The device according to the invention can be used, for example, inside a furnace, instead of the furnace being fired with split firewood or similar. The device can be used placed directly on a conventional grate, or by using a suitable grate equipped with a recess. The device according to the invention is also suitable for use as a camping-cooker type heat source, because as the device's dimensions are in no way restricted, it can be manufactured in either a very small size, or if desired, in a quite large size. Outdoors, it can be used as a 'lumberjack's candle' type of light source, for example, to decorate a party area.
It is obvious that, in addition, to variations in size, the manufacturing material and shape of the device can be varied within very broad limits. Cheap versions of it can be made using cheap raw materials, while the possible variations are greatly increased if very durable materials are used, or, for example, materials that create a beautiful external appearance.
Other variations, which remain within the scope defined by the basic inventive idea and the accompanying Claims, are also possible.

Claims

Claims
1. A burning device, particularly for burning so-called pellets, including a barrel-like component (4), in which the pellets or similar fuel are placed, characterized in that it also includes a second, bottomless and coverless barrel component (2) fitting inside the barrel-like component (4) and supported on the upper surface of the pellets (7), in such a way that both component (4) and component (2) have holes in their jacket surfaces.
2. A burning device according to Claim 1 , characterized in that the components (2, 4) are cylindrical and fit telescopically inside each other.
3. A burning device according to Claim 1 or 2, characterized in that the lower component (4) has a perforated grate component (5) in a position raised above the lower edge of the component (4).
4. A burning device according to Claim 1 , characterized in that the component (4) is perforated essentially over its entire jacket surface, but.the component (2) has holes only in the vicinity of its lower edge.
5. A burning device according to Claim 1 , characterized in that the holes in the jacket surfaces of the components (2, 4) are of such a type and density that open holes for combustion air (3) to enter the device always remain near the upper surface of the pellet charge.
6. A burning device according to Claim 5, characterized in that the holes in the upper component (2) are essentially larger than the holes in the lower component (4).
7. A burning device according to any of the above Claims, characterized in that its cross-section is a circular cylinder.
8. A burning device according to any of the above Claims, characterized in that its components (2, 4) are manufactured from sheet metal.
EP02753106A 2001-08-22 2002-08-21 Burning device Expired - Lifetime EP1427963B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI20011684 2001-08-22
FI20011684A FI109723B (en) 2001-08-22 2001-08-22 Burning device for burning so-called pellets used in combustion furnaces
PCT/FI2002/000685 WO2003019077A1 (en) 2001-08-22 2002-08-21 Burning device

Publications (2)

Publication Number Publication Date
EP1427963A1 true EP1427963A1 (en) 2004-06-16
EP1427963B1 EP1427963B1 (en) 2006-10-18

Family

ID=8561774

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02753106A Expired - Lifetime EP1427963B1 (en) 2001-08-22 2002-08-21 Burning device

Country Status (6)

Country Link
EP (1) EP1427963B1 (en)
AT (1) ATE343097T1 (en)
DE (1) DE60215527T2 (en)
DK (1) DK1427963T3 (en)
FI (1) FI109723B (en)
WO (1) WO2003019077A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1983262A2 (en) 2007-04-05 2008-10-22 Pauli Pieti Grate

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10859259B2 (en) 2018-10-17 2020-12-08 Logan Outdoor Products, Llc Burner housing for a pellet grill
EP4227580A1 (en) 2022-02-09 2023-08-16 Pauli Pieti Fireplace intended for solid fuels with multi-fuel device arranged into its burning place

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE87199C1 (en) *
DE806582C (en) * 1949-10-15 1951-06-14 Gustav Mueller Sawdust boiler for hot water heating
NO300516B1 (en) * 1995-04-21 1997-06-09 Paal Wendelbo Oven made of packaging material and packaging for making the oven
FI974044A (en) * 1997-10-24 1999-04-25 Tapio Niemi Stove

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03019077A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1983262A2 (en) 2007-04-05 2008-10-22 Pauli Pieti Grate

Also Published As

Publication number Publication date
WO2003019077A1 (en) 2003-03-06
FI20011684A0 (en) 2001-08-22
ATE343097T1 (en) 2006-11-15
FI109723B (en) 2002-09-30
DE60215527T2 (en) 2007-07-05
DE60215527D1 (en) 2006-11-30
EP1427963B1 (en) 2006-10-18
DK1427963T3 (en) 2007-02-12

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