NZ578968A - Fuel feed system for a pellet fire - Google Patents
Fuel feed system for a pellet fireInfo
- Publication number
- NZ578968A NZ578968A NZ578968A NZ57896810A NZ578968A NZ 578968 A NZ578968 A NZ 578968A NZ 578968 A NZ578968 A NZ 578968A NZ 57896810 A NZ57896810 A NZ 57896810A NZ 578968 A NZ578968 A NZ 578968A
- Authority
- NZ
- New Zealand
- Prior art keywords
- feed system
- fuel feed
- casing
- fuel
- outlet
- Prior art date
Links
Classifications
-
- 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
- F24B13/00—Details solely applicable to stoves or ranges burning solid fuels
- F24B13/04—Arrangements for feeding solid fuel, e.g. hoppers
-
- 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
Abstract
Disclosed is a fuel feed system for a pellet fire. The system has a conveying means within a casing, the casing including a number of inlets distributed lengthwise along the casing and a number of outlets distributed lengthwise along the casing. Each inlet is horizontally offset from an adjacent outlet and the conveying means is configured to move compressed fuel pellets from an inlet to an adjacent outlet. In use the fuel feed system is configured to form a plurality of overlapping piles of compressed fuel pellets in a burn pot of the pellet fire.
Description
COMPLETE SPECIFICATION
TITLE: FUEL FEED SYSTEM FOR A PELLET FIRE
New Zealand Patent Application No. 578968 5 Filed: 10 February 2010
Technical Field
The present invention is a fuel feed system for use in pellet fires.
Background Art
Any discussion of the prior art throughout the specification is not an admission that such prior art is widely known or forms part of the common general knowledge in the field.
Pellet fires are becoming more popular; they burn compressed pellets of combustible material, normally wood, but corn, grain and other materials are used. The pellets are a uniform size range and composition so their combustion is more predictable than natural wood or coal.
Pellet fires automatically feed the fuel into the fire box from a storage hopper. Pellet fires are classified by their method of feeding fuel into the burn pot, top feed or bottom feed.
In a bottom feed pellet fire a horizontal auger that normally lies in the base of the burn 25 pot, for at least part of its length, feeds the pellets from the hopper through the burn pot and discharges the ash out the other end. It can be difficult to prevent the fire burning back into the hopper full of fuel if a power failure occurs. The auger is exposed to the full heat of the fire and the abrasive and/or corrosive ash and combustion products. However, aesthetically, many prefer the look of a bottom fed 30 pellet fire as they tend to have a wider exposed flame front.
In a top feed pellet fire an inclined auger lifts the pellets from the base of the hopper and discharges them above the burn pot. The pellets then gravity feed into the burn pot, often falling onto an inclined plate first. This feed is from a single tube or chute 35 which forms a single pile of pellets in the burn pot, which some find creates a less
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aesthetically appealing flame than the bottom feed. The gravity feed section minimises the chance of any burn back into the hopper.
It is preferably an object of the present invention to provide a fuel feed system for a 5 pellet fire that ameliorates one or more of the limitations of existing systems, or provides the consumer with a useful choice.
Disclosure of Invention
The present invention provides a fuel feed system for a pellet fire which includes conveying means within a casing, said casing including a plurality of inlet means distributed lengthwise along the casing and a plurality of outlet means distributed lengthwise along the casing, such that each inlet means is horizontally offset from the adjacent outlet means and wherein said conveying means is configured to move 15 compressed fuel pellets from an inlet means to an adjacent outlet means; such that in use said fuel feed system is configured to form a plurality of overlapping piles of compressed fuel pellets in a burn pot of the pellet fire.
Preferably the longitudinal axis of the casing and the burn pot are approximately 20 parallel.
Preferably said inlet means and/or outlet means are apertures in the casing. In a highly preferred form the conveying means is one or more concentrically aligned augers. In a most preferred form the conveying means is a single auger.
Preferably the casing is not a single piece of material. In one preferred form the casing is formed by parts of the pellet fire or fuel feed system alone or in combination with additional separate components.
In a preferred form the fuel feed system includes a plurality of delivery ducts and/or channels such that each outlet means forms one end of an associated delivery duct or channel, such that at an opposite end of each said delivery duct or channel there is a delivery outlet that is configured to deliver the compressed fuel pellets, directly or indirectly, into the burn pot. Preferably the fuel feed system includes a distribution 35 section which lies between the delivery outlets and the burn pot. In a highly preferred
2
form the distribution section is an angled plate that vertically and/or horizontally separates the delivery outlets and the burn pot.
Preferably where the fuel feed system does not include delivery ducts and/or channels it includes a primary distribution section which lies between the outlet means and the burn pot. In a highly preferred form the primary distribution section is an angled plate that vertically and/or horizontally separates the outlet means and the burn pot.
The invention also includes a pellet fire incorporating the fuel feed system.
Preferably the pellet fire includes a hopper configured to store compressed fuel pellets such that an outlet of the hopper is coterminous with the fuel feed system. In a highly preferred form the casing lies essentially horizontally across the outlet of the hopper.
In a further preferred form the fuel feed system includes a plurality of casings, either separated or coterminous, each with at least one conveying means.
Brief Description of Drawings
By way of example only, a preferred embodiment of the present invention is described in detail below with reference to the accompanying drawings, in which:
Figure 1 is a cutaway pictorial view of a pellet fire showing the fuel feed system; Figure 2 is a pictorial view of a hopper with a fuel feed system and fire box removed from the pellet fire;
Figure 3 is a plan view of the hopper with feed system and fire box removed from the pellet fire, with no fuel in the hopper or burn pot;
Figure 4 is a cross sectional plan view through the hopper and fuel feed system in the direction of arrows A-A., with no fuel in the burn pot;
Figure 5 is a is a plan view of the hopper with feed system and fire box removed from the pellet fire, with fuel pellets in the hopper and interlinking piles of pellets in the burn pot
Best Mode for Carrying Out the Invention
Referring to Figure 1, a cutaway view of a pellet fire (1) including a first sub-assembly (2) is shown. Said first sub assembly (2) includes a hopper (3), fuel feed system (4) and burn pot (5), such that the hopper (3) is a storage container for compressed fuel
3
pellets of a known type. The hopper (3) is connected to the fuel feed system (4), which in turn is connected to the burn pot (5).
The burn pot (5) is of a known type that includes a channel (6) with a perforated base 5 (7) which, when the pellet fire (1) is in use, acts as a grate. Other surfaces of the channel (6) or burn pot (5) may also be perforated but this is optional and not shown in the drawings.
Referring to Figures 2 to 5 the first sub-assembly (2) is shown removed from the pellet fire (1) for clarity. Figures 2 to 4 show the first sub-assembly (2) without compressed 10 fuel pellets.
Referring to figures 2 to 4, where figure 4 is a cross sectional view in the direction of arrows A-A shown in figure 2, the fuel feed system (4) including a second subassembly (10) is shown. The second sub-assembly (10) includes a conveying means 15 (11), a plurality of inlet means (12) and a plurality of outlet means (13). Each inlet means (12) is separated from the adjacent inlet means (12) by first shield means (14), and each outlet means (13) is separated from the adjacent outlet means (13) by second shield means (15).
The conveying means (11) is an auger of known type which lies essentially horizontally (though in some embodiments may be angled) across the base of the hopper (3). The first and second shield means (14,15) form a casing (16) in which the conveying means (11) is located, the inlet and outlet means (12,13) are apertures in this casing (16). Each inlet means (12) is horizontally offset from the nearest outlet 25 means (13) along the length of the casing (16).
The first sub-assembly (2) further includes a plurality of delivery means (20) and delivery outlets (21), and a distribution section (22). Each delivery means (20) is a duct which has an outlet means (13) as one end and a delivery outlet (21) as the 30 opposite end. Each delivery means (20) is angled such that the delivery outlet (21) is vertically separated from the associated outlet means (13). The term 'duct' is intended to include hollow prisms with any cross sectional shape, even if the cross sectional shape changes from one end to the other.
4
Each delivery outlet (21) lies above the distribution section (22) which is connected to the burn pot (5). The distribution section (22) is an angled plate extending the length of the channel (6).
Referring to figure 5, the first sub-assembly (2) containing compressed fuel pellets is shown. The fuel feed system (4), in use, creates a plurality of overlapping pellet piles (30), such that in use these overlapping piles form a wide flame front in the burn pot (5).
By way of example only the flow of compressed fuel pellets through the first subassembly with the pellet fire (1) in use will be described.
The compressed fuel pellets in the hopper (3) fall, or are pulled through, an inlet means (12). The conveying means (11) then moves these compressed fuel pellets to 15 a horizontally offset adjacent outlet means (13). The compressed fuel pellets then move through the delivery means (20) associated with that outlet means (13) and out of the associated delivery outlet (21). The compressed fuel pellets then fall onto the distribution section (22) and are gravity fed into the channel (6). Each delivery outlet (21) directs compressed fuel pellets onto a separated, but overlapping pellet pile (30) 20 for combustion.
As each inlet means (12) is horizontally offset from each adjacent outlet means (13), the mass/volume of compressed fuel pellets through the fuel feed system (4) can be controlled. In other words the compressed fuel pellets cannot fall directly from an inlet 25 means (12) into an outlet means (13), they must be physically moved from one to the other by the conveying means (11). This horizontal separation of adjacent inlet and outlet means (12,13) prevents the compressed fuel pellets from directly feeding from the hopper (3) to the burn pot (5). If the conveying means (11) is stopped then the compressed fuel pellet flow is essentially stopped at the same time.
In a further embodiment the fuel feed system (4) is not directly connected to the burn pot (5). In this embodiment the fuel pellets fall from the fuel feed system (4) into the burn pot (5).
In a further embodiment (not shown) the distribution section (22) is not present, so that in use the compressed fuel pellets fall directly from each delivery outlet (21) into the burn pot (5).
In a further embodiment the second sub-assembly (10) is not at the base of the hopper (3).
In a further embodiment the conveying means (11) is a plurality of augers each able to be separately driven.
In a further embodiment there are two or more augers which may or may not be concentrically aligned. For example (not shown) they may be parallel with horizontal or vertical separation.
In one embodiment (not shown) there are one or more additional casings, each separate from or coterminous with the casing (16). Each of these additional casings is similar to the casing (16) in that they include additional inlet and/or outlet means that are horizontally separated, and house one or more additional conveying means. For example there may be two parallel augers within a single casing, two additional 20 conveying means in two separated casings each configured to, either separately or in combination, create a plurality of overlapping pellet piles (30).
In a further embodiment (not shown) the conveying means (11) is not located in the casing (16) and the casing (16) is hollow.
6
Claims (17)
1. A fuel feed system for a pellet fire which includes conveying means within a casing, said casing including a plurality of inlet means distributed lengthwise along the 5 casing and a plurality of outlet means distributed lengthwise along the casing, such that each inlet means is horizontally offset from an adjacent outlet means and wherein said conveying means is configured to move compressed fuel pellets from an inlet means to an adjacent outlet means; such that in use said fuel feed system is configured to form a plurality of overlapping piles of compressed fuel pellets in a burn 10 pot of the pellet fire.
2. The fuel feed system as claimed in claim 1 characterised in that the longitudinal axis of the casing and the burn pot are approximately parallel. 15
3. The fuel feed system as claimed in claim 1 or claim 2 characterised in that the casing and the burn pot are vertically separated.
4. The fuel feed system as claimed in any of the preceding claims characterised in that the said inlet means and/or outlet means are apertures in the casing. 20
5. The fuel feed system as claimed in any one of the preceding claims characterised in that the conveying means is one or more concentrically aligned augers. 25
6. The fuel feed system as claimed in any one of the preceding claims characterised in that the conveying means is a single auger.
7. The fuel feed system as claimed in any one of the preceding claims characterised in that the fuel feed system includes a plurality of delivery ducts and/or 30 channels, wherein each outlet means forms one end of an associated delivery duct or channel, such that at an opposite end of each said delivery duct or channel there is a delivery outlet that is configured to deliver the compressed fuel pellets .directly or indirectly, into the burn pot. 7
8. The fuel feed system as claimed in claim 7 characterised in that the fuel feed system includes a distribution section which lies between the delivery outlets and the burn pot. 5
9. The fuel feed system as claimed in claim 8 characterised in that the distribution section is an angled plate that vertically and horizontally separates the delivery outlets and the burn pot.
10. The fuel feed system as claimed in any one of claims 1 to 6 characterised in 10 that the fuel feed system includes a primary distribution section which lies between the outlet means and the burn pot.
11. The fuel feed system as claimed in claim 10 characterised in that the primary distribution section is an angled plate that vertically and horizontally separates the 15 outlet means and the burn pot.
12. The fuel feed system as claimed in any one of the preceding claims characterised in that the casing is not a single piece of material. 20
13. The fuel feed system as claimed in claim 12 characterised in that the casing is formed by parts of the pellet fire or fuel feed system alone or in combination with additional separate components.
14. The fuel feed system as claimed in any one of the preceding claims which 25 includes at least one additional casing, either separated from or coterminous with the casing, wherein the or each additional casing includes one or more additional conveying means.
15. A pellet fire including the fuel feed system as claimed in any one of the 30 preceding claims.
16. The pellet fire as claimed in claim 15 characterised in that it includes a hopper configured to store compressed fuel pellets such that an outlet of the hopper is coterminous with the fuel feed system. 35 8
17. The pellet fire as claimed in claim 16 characterised in that the casing lies essentially horizontally across the outlet of the hopper. 9
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NZ578968A NZ578968A (en) | 2010-02-10 | 2010-02-10 | Fuel feed system for a pellet fire |
| JP2012552495A JP5780436B2 (en) | 2010-02-10 | 2011-01-31 | Fuel supply system for pellet furnace |
| PCT/IB2011/050405 WO2011098932A1 (en) | 2010-02-10 | 2011-01-31 | Fuel feed system for a pellet fire |
| AU2011213993A AU2011213993B2 (en) | 2010-02-10 | 2011-01-31 | Fuel feed system for a pellet fire |
| HUE11741961A HUE046137T2 (en) | 2010-02-10 | 2011-01-31 | Fuel feed system for a pellet fire |
| EP11741961.4A EP2534423B1 (en) | 2010-02-10 | 2011-01-31 | Fuel feed system for a pellet fire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NZ578968A NZ578968A (en) | 2010-02-10 | 2010-02-10 | Fuel feed system for a pellet fire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NZ578968A true NZ578968A (en) | 2011-03-31 |
Family
ID=43901733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NZ578968A NZ578968A (en) | 2010-02-10 | 2010-02-10 | Fuel feed system for a pellet fire |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP2534423B1 (en) |
| JP (1) | JP5780436B2 (en) |
| AU (1) | AU2011213993B2 (en) |
| HU (1) | HUE046137T2 (en) |
| NZ (1) | NZ578968A (en) |
| WO (1) | WO2011098932A1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102827073A (en) | 2011-06-17 | 2012-12-19 | 安吉奥斯医药品有限公司 | Therapeutically active compositions and application methods thereof |
| US9474779B2 (en) | 2012-01-19 | 2016-10-25 | Agios Pharmaceuticals, Inc. | Therapeutically active compositions and their methods of use |
| WO2015003360A2 (en) | 2013-07-11 | 2015-01-15 | Agios Pharmaceuticals, Inc. | Therapeutically active compounds and their methods of use |
| JP6529492B2 (en) | 2013-07-11 | 2019-06-12 | アジオス ファーマシューティカルズ， インコーポレイテッド | 2,4- or 4,6-Diaminopyrimidine Compounds as IDH2 Mutant Inhibitors for the Treatment of Cancer |
| US9579324B2 (en) | 2013-07-11 | 2017-02-28 | Agios Pharmaceuticals, Inc | Therapeutically active compounds and their methods of use |
| WO2015003355A2 (en) | 2013-07-11 | 2015-01-15 | Agios Pharmaceuticals, Inc. | Therapeutically active compounds and their methods of use |
| US20150031627A1 (en) | 2013-07-25 | 2015-01-29 | Agios Pharmaceuticals, Inc | Therapeutically active compounds and their methods of use |
| AU2015229214B2 (en) | 2014-03-14 | 2019-07-11 | Les Laboratoires Servier | Pharmaceutical compositions of therapeutically active compounds |
| CA3216701A1 (en) | 2015-10-15 | 2017-04-20 | Les Laboratoires Servier | Combination therapy for treating malignancies |
| BR112018007656A2 (en) | 2015-10-15 | 2018-11-06 | Agios Pharmaceuticals Inc | combination therapy for treatment of malignant diseases |
| US10980788B2 (en) | 2018-06-08 | 2021-04-20 | Agios Pharmaceuticals, Inc. | Therapy for treating malignancies |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5872803A (en) * | 1981-10-27 | 1983-04-30 | Yahiro Sangyo Kk | Combustion method and apparatus for woody fuel |
| JPS602406Y2 (en) * | 1983-02-24 | 1985-01-23 | 三井造船株式会社 | Boiler with stoker combustion device |
| JPS61198813U (en) * | 1985-05-30 | 1986-12-12 | ||
| US5018455A (en) * | 1990-06-15 | 1991-05-28 | Harman Stove And Welding, Inc. | Feed system for pellet burning stove |
| US5151000A (en) * | 1991-06-24 | 1992-09-29 | Rod Geraghty | Pellet stove feeder |
| JP3272605B2 (en) * | 1996-07-18 | 2002-04-08 | 三菱重工業株式会社 | Method and apparatus for reducing coal-containing iron ore pellets |
| US6223737B1 (en) * | 1999-09-27 | 2001-05-01 | Carrol E. Buckner | Pellet fuel burning device |
| JP2005300022A (en) * | 2004-04-12 | 2005-10-27 | Narasaki Seisakusho:Kk | Combustion apparatus of solid fuel |
| JP4725712B2 (en) * | 2005-01-25 | 2011-07-13 | オヤマダエンジニアリング株式会社 | Solid fuel combustion equipment |
| US20070137503A1 (en) * | 2005-12-16 | 2007-06-21 | Traeger Joseph P | Pellet-fired smoke generator |
| JP4719712B2 (en) * | 2007-05-08 | 2011-07-06 | ネポン株式会社 | Horticultural house heating device with wood burning combustion furnace |
| US20090293860A1 (en) * | 2008-04-29 | 2009-12-03 | Timothy Randall Carlson | Systems and methods relating to fireplaces comprising modular feed and combustion systems for biomass solid particulate fuels |
-
2010
- 2010-02-10 NZ NZ578968A patent/NZ578968A/en unknown
-
2011
- 2011-01-31 HU HUE11741961A patent/HUE046137T2/en unknown
- 2011-01-31 EP EP11741961.4A patent/EP2534423B1/en not_active Not-in-force
- 2011-01-31 AU AU2011213993A patent/AU2011213993B2/en not_active Ceased
- 2011-01-31 JP JP2012552495A patent/JP5780436B2/en not_active Expired - Fee Related
- 2011-01-31 WO PCT/IB2011/050405 patent/WO2011098932A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| EP2534423B1 (en) | 2019-06-12 |
| EP2534423A4 (en) | 2017-11-22 |
| JP5780436B2 (en) | 2015-09-16 |
| JP2013519858A (en) | 2013-05-30 |
| AU2011213993A1 (en) | 2012-08-30 |
| WO2011098932A1 (en) | 2011-08-18 |
| HUE046137T2 (en) | 2020-02-28 |
| AU2011213993B2 (en) | 2014-11-06 |
| EP2534423A1 (en) | 2012-12-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PSEA | Patent sealed | ||
| S881 | Correction of error according section 88(1) (mistake in register by reason of an error or omission on the part of the patent office) |
Free format text: CORRECTION TO APPLICANT (71) |
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| RENW | Renewal (renewal fees accepted) |
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