EP2304319A2 - Firing product feed device for a furnace for outputs down to less than 1 kw - Google Patents
Firing product feed device for a furnace for outputs down to less than 1 kwInfo
- Publication number
- EP2304319A2 EP2304319A2 EP09761228A EP09761228A EP2304319A2 EP 2304319 A2 EP2304319 A2 EP 2304319A2 EP 09761228 A EP09761228 A EP 09761228A EP 09761228 A EP09761228 A EP 09761228A EP 2304319 A2 EP2304319 A2 EP 2304319A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- screw
- diameter
- screw conveyor
- kiln
- tube
- 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
Links
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
- F23K3/10—Under-feed arrangements
- F23K3/14—Under-feed arrangements feeding by screw
-
- 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
- F23B40/04—Combustion apparatus with driven means for feeding fuel into the combustion chamber the fuel being fed from below through an opening in the fuel-supporting surface
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H2700/00—Grates characterised by special features or applications
- F23H2700/005—Rotary grates with vertical axis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H9/00—Revolving-grates; Rocking or shaking grates
- F23H9/02—Revolving cylindrical grates
-
- 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 difficulty is, first, to keep the fire burning safely, second, to continuously carry off the ashes, and, thirdly, to prevent the fire from feeding into the feed stream of the burning material.
- the object of the present invention is to provide a Brenngut- feed device for granular fuel for a furnace for benefits down to less than 1kW.
- This furnace is to ensure the continuous supply and the continuous burning of the supplied granular combustible material, and also ensure the continuous ash removal, so that a long unattended operation of the furnace is made possible, which is limited only by the size of the fuel reservoir and the ash catcher, so far these reservoirs are not automatically filled or emptied.
- a kiln feed device for granular fuel for a furnace for services down to less than 1kW which has a arranged in a pipe screw conveyor for the delivery of the granular material, and which is characterized in that the central screw axis of the screw conveyor, on the outer wall of the screw winding is mounted and with which together the screw conveyor is rotatably mounted in the tube, at least a quarter of the pipe diameter fills, further that this screw axis pipe runs up as a cone in a tip, above the screw a circular rust is arranged horizontally with central round hole and air supply openings in the outer region of the grate, which hole is smaller than the diameter of the screw conveyor and wherein from its edge a conically widening wall as a sliding wall for the fuel to be conveyed outwards ausl UFT, which approximately or exactly parallel to the cone of the upper end of the Helix axis runs.
- Figure 1 seen the supply device with the arranged at the upper end grate in a longitudinal section
- Figure 2 A cross section through the screw conveyor, seen from above;
- Figure 3 The entire screw conveyor seen from the side, shown in a longitudinal section.
- Figure 1 shows such a conveyor for granular kiln for a furnace, which is designed for performances of down to less than 1KW.
- the kiln can consist of wood pellets, but also of wood chips, small pieces of wood or dried corn or other grains.
- the grate 1 of the furnace cooperates with the feed device, and this is equipped with a screw conveyor 2.
- the screw conveyor 2 is arranged in the example shown perpendicular to the grate surface and the central screw axis tube 3, on the outer wall 4, the screw 5 is mounted and with which together the screw conveyor 2 is rotatably mounted in the conveyor tube 8, fills a considerable part of the conveyor tube 8, which the whole screw conveyor 2 encloses.
- the conveyor tube 8 with the screw conveyor 2 can also be arranged obliquely to the perpendicular. It is then achieved on the bottom of additional friction of the fuel with the delivery pipe 8, which is beneficial to the promotion.
- the pipe diameter of the worm axis pipe 3 measures one third of the screw diameter or the pipe diameter, and measures, for example, 60 mm.
- the diameter of the screw axis tube 3 should be at least a quarter of the screw conveyor diameter, because thus also a sufficient torque on the actual screw 2 and on the helical to the screw axis tube 3 wound smoothest possible conveying surface 5 are transmitted.
- On the conveying surface 5 of the screw. 2 Here is a single wood pellet 18 drawn to give an approximate size comparison.
- This screw axis tube 3 runs up as a cone 10 in a tip, wherein above the screw 2, the grate 1 is arranged horizontally with a central circular hole 6. It fits exactly on the upper end of the auger axle tube 8 and is placed on this.
- the grate 1 is preferably circular as shown and interspersed with air supply openings 7 in the outer region.
- the circular hole 6 in the grate 1 measures approximately half of the delivery pipe diameter. From this circular hole 6 includes a downwardly projecting, funnel-shaped edge 9, which opens as a funnel down.
- the funnel wall runs almost or exactly parallel to the cone 10 on the worm axis tube 3.
- the cone 10 encloses an acute angle with the running direction of the funnel inner wall, the angle tip being at the top. This angle may only be very small, otherwise a jamming of the fuel in the area between the cone 10 and the funnel inner wall is provoked.
- the actual screw 2 or its winding conveying surface 5 terminates with an approximately perpendicular to the grate surface extension 11.
- This auger 2 as shown here rotates clockwise in operation as seen from above. Of course, it could also be designed to boost in a counterclockwise direction.
- the firing material to be conveyed remains approximately at the same point in relation to its rotational position in the conveying tube 8, and the conveying surface 5 of the screw 2 slides under the kiln, being lifted up in the conveying tube 8, until finally at the level of the hole 6 arrives.
- the inside of the tube 8 is equipped with a plurality of preferably axially extending plateaus or grooves 14, on which the auger turns past with a minimum distance, and between the plateaus or grooves a distance of the height of the plateaus or grooves to the inner wall of the tube 8 leaves open.
- the inner wall of the tube 8 may also be provided with a rough surface.
- the auger 2 rotates only very slowly, with a rotational speed of less than 1 rev / min.
- the kiln parts are moved every minute, handling handling of the extension 11, very slowly on the grate and finally on the fire zone, which is formed by that area 13, which is equipped with air holes 7.
- the diameter of the whole grate 1 is about twice the diameter of the conveyor tube 8. So if this measures 60mm, then the grate 1 measures about 120mm in diameter. Due to the gentle and continuous supply of fresh fuel a nice, high and regular flame pattern on the grate 1 is achieved, and no flickering, technically effective flames.
- the screw conveyor 2 in its entire height. It measures between 200mm to 800mm in height and between 55mm and 85mm in diameter.
- the auger axle tube 3 measures one-quarter to a little over one-third of the diameter in diameter, and the pitch of the auger per revolution is about one-half auger diameter.
- Below the conveyor pipe 8 can be completely in a pile of kiln parts, or in a box 15, which can be fed from above or via, for example, an inclined surface 16 as a granulated material with kiln.
- the conveyor tube 8 is open at the bottom on one side, and through this opening 17 in winningrqhr 8 trickle the kiln pieces, in the example shown cylindrical wood pellets on the screw 2 after.
- the kiln feed device for such wood stoves for powers of less than 1kW is equipped with an electric motor which drives the worm 2 via a reduction gear.
- the rotational speed of the screw conveyor 2 can be adjusted from 0.5 to 2 revolutions per minute and thus the supply amount of fuel per time and thus the heating power can be regulated.
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)
- Screw Conveyors (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
- Solid-Fuel Combustion (AREA)
- Furnace Charging Or Discharging (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH8822008A CH704571B1 (en) | 2008-06-11 | 2008-06-11 | Combustible material supply means for a furnace for services down to less than 1 kW. |
PCT/CH2009/000185 WO2009149570A2 (en) | 2008-06-11 | 2009-06-04 | Firing product feed device for a furnace for outputs down to less than 1 kw |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2304319A2 true EP2304319A2 (en) | 2011-04-06 |
EP2304319B1 EP2304319B1 (en) | 2012-08-29 |
Family
ID=41343450
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09761228A Active EP2304319B1 (en) | 2008-06-11 | 2009-06-04 | Firing product feed device for a furnace for outputs down to less than 1 kw |
Country Status (6)
Country | Link |
---|---|
US (1) | US8904944B2 (en) |
EP (1) | EP2304319B1 (en) |
JP (1) | JP5390603B2 (en) |
CA (1) | CA2727412C (en) |
CH (1) | CH704571B1 (en) |
WO (1) | WO2009149570A2 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH703513B1 (en) * | 2010-07-27 | 2014-09-30 | St V Sa | Furnace for granular material to be burned, for services down to less than 1 kW, with means for Brenngutzufuhr and the ash crushing and distribution. |
US20120261433A1 (en) | 2011-04-13 | 2012-10-18 | Aylward Enterprises | Two-piece helical feeder tube for filling containers with pills |
KR101345425B1 (en) | 2012-05-31 | 2013-12-27 | 안상일 | A fire grate for combustion apparatus |
DE102015002770A1 (en) * | 2015-03-05 | 2016-09-08 | Schenck Process Gmbh | Apparatus and method for conveying bulk material into a pressure chamber |
UA119005C2 (en) * | 2015-04-02 | 2019-04-10 | Бті Гумковскі Сп. З О.О. Сп. К. | Solid fuel boiler burner |
US10562696B2 (en) * | 2015-12-24 | 2020-02-18 | Toly Korea Inc. | Container for storing and individually discharging capsules |
JP2020502475A (en) | 2016-12-20 | 2020-01-23 | アドゥーロ アクティーゼルスカブ | Combi stove and use of combi stove |
US10839635B2 (en) | 2017-06-21 | 2020-11-17 | Toly Management Ltd. | Sweep bead dispenser |
US10526131B2 (en) | 2017-06-21 | 2020-01-07 | Toly Management Ltd. | Sweep bead dispenser |
RU204249U1 (en) * | 2021-03-01 | 2021-05-17 | Общество с ограниченной ответственностью «ПИОН-Р» (ООО «ПИОН-Р») | RETORT BURNER |
EP4299482A1 (en) * | 2021-03-26 | 2024-01-03 | FUJIFILM Corporation | Powder supply device |
CN114877313B (en) * | 2022-04-14 | 2023-06-27 | 广西抿元投资控股集团有限公司 | Water-cooling vibrating grate direct-fired biomass boiler |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1876935A (en) * | 1931-03-25 | 1932-09-13 | Cleveland Stoker Company | Stoker |
US2359638A (en) * | 1940-05-09 | 1944-10-03 | Paul B Greger | Fuel feeder for furnaces |
US2320410A (en) * | 1940-06-19 | 1943-06-01 | Thomas C Cheasley | Combination retort and hearth for stokers |
GB666686A (en) | 1947-08-07 | 1952-02-20 | Henry Percy Baughan | Improvements in or relating to conveying mechanisms |
NL83040C (en) * | 1952-02-23 | 1900-01-01 | ||
US2932713A (en) * | 1958-05-26 | 1960-04-12 | Gen Electric | Incinerator |
US2932712A (en) * | 1958-05-26 | 1960-04-12 | Gen Electric | Incinerator |
JPS6029843B2 (en) * | 1982-02-17 | 1985-07-12 | 五郎 森 | Continuous combustion device |
JPS58148312A (en) * | 1982-02-26 | 1983-09-03 | Tsutomu Sakamoto | Incinerator for solid matter mixed with incombustible matter |
US4548194A (en) * | 1982-07-27 | 1985-10-22 | Schafer Tony L | Fuel stoker and furnace |
JPS60117003A (en) | 1983-11-28 | 1985-06-24 | Ishida Tekkosho:Kk | Combustion device employing pellet fuel |
US4553285A (en) * | 1984-07-18 | 1985-11-19 | Sachs Kerry M | Plug furnace |
JP2000001677A (en) * | 1998-06-17 | 2000-01-07 | Yoichi Wada | Pyrolysis system for polymeric waste |
JP2000281208A (en) * | 1999-03-31 | 2000-10-10 | Toshiba Corp | Waste carrying device |
-
2008
- 2008-06-11 CH CH8822008A patent/CH704571B1/en not_active IP Right Cessation
-
2009
- 2009-06-04 US US12/997,841 patent/US8904944B2/en not_active Expired - Fee Related
- 2009-06-04 JP JP2011512803A patent/JP5390603B2/en not_active Expired - Fee Related
- 2009-06-04 CA CA2727412A patent/CA2727412C/en not_active Expired - Fee Related
- 2009-06-04 WO PCT/CH2009/000185 patent/WO2009149570A2/en active Application Filing
- 2009-06-04 EP EP09761228A patent/EP2304319B1/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2009149570A2 * |
Also Published As
Publication number | Publication date |
---|---|
US20110120354A1 (en) | 2011-05-26 |
CH704571B1 (en) | 2012-09-14 |
US8904944B2 (en) | 2014-12-09 |
WO2009149570A2 (en) | 2009-12-17 |
WO2009149570A3 (en) | 2010-12-23 |
EP2304319B1 (en) | 2012-08-29 |
JP2011523015A (en) | 2011-08-04 |
JP5390603B2 (en) | 2014-01-15 |
CA2727412A1 (en) | 2009-12-17 |
CA2727412C (en) | 2016-10-18 |
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