US20100018443A1 - Clean burning furnace method and apparatus - Google Patents
Clean burning furnace method and apparatus Download PDFInfo
- Publication number
- US20100018443A1 US20100018443A1 US12/322,853 US32285309A US2010018443A1 US 20100018443 A1 US20100018443 A1 US 20100018443A1 US 32285309 A US32285309 A US 32285309A US 2010018443 A1 US2010018443 A1 US 2010018443A1
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- Prior art keywords
- chamber
- flues
- ash
- furnace
- housing
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B10/00—Combustion apparatus characterised by the combination of two or more combustion chambers
-
- 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
- F23B50/02—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 forming a column, stack or thick layer with the combustion zone at its bottom
- F23B50/06—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 forming a column, stack or thick layer with the combustion zone at its bottom the flue gases being removed downwards through one or more openings in the fuel-supporting surface
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Solid-Fuel Combustion (AREA)
Abstract
A furnace includes a primary and secondary combustion chamber. Heated air from the secondary combustion chamber travels through a vertically-oriented set of flues, and two horizontally-oriented sets of flues before exiting through a chimney.
Description
-
FIG. 1 is a perspective view of the apparatus; -
FIG. 2 is a schematic diagram of the heat transfer; -
FIG. 3 is a perspective view of the rear door of the apparatus; -
FIG. 4 is a perspective cut away view of the apparatus; -
FIG. 5 is a furnace properties table; -
FIG. 6 is a front elevational view of the apparatus; -
FIG. 7 is a rear perspective view of the apparatus detailing the blower; -
FIG. 8 is a schematic elevational view of a typical installation in a home or shop environment; -
FIG. 9 is a schematic perspective view of a closed-circuit installation; -
FIG. 10 is a second furnace properties table; -
FIG. 11 is a perspective schematic view of one embodiment the firebrick layout; -
FIG. 12 is an exploded perspective view of the apparatus showing the rear panel; -
FIG. 13 is an exploded perspective view of the apparatus showing the front loading door; -
FIG. 14A is a front elevational view of the apparatus; -
FIG. 14B is a side elevational view of the apparatus; -
FIG. 14C is a rear elevational view of the apparatus; -
FIG. 14D is a detail view of a clean-out door; -
FIG. 15 is an exploded perspective view of a first embodiment of the firebrick insulation; -
FIG. 16 is an assembled perspective view of the first embodiment of the firebrick insulation; -
FIG. 17 is a front elevational view of a first embodiment the firebrick; -
FIG. 18 is a front elevational view of the first embodiment of the firebrick insulation; -
FIG. 19 is a front elevational view of a second embodiment the firebrick; -
FIG. 20 is a perspective view of the firebrick in a second embodiment; -
FIG. 21 is an exploded perspective view of the firebrick in a second embodiment; -
FIG. 22 is a perspective view of a first embodiment of the firebrick; -
FIG. 23 is an exploded perspective view of a first embodiment of the firebrick with airgap brick spacers; -
FIG. 24 to 31 are photographic perspective drawings of a series of maintenance steps; -
FIGS. 32 to 35 are photographic perspective drawings of a series of maintenance steps that the rear panel; -
FIGS. 36 to 39 are additional photographic perspective drawings of a series of maintenance steps at the rear panel; -
FIGS. 40 to 42 are additional photographic perspective drawings of a series of maintenance steps at the rear panel; -
FIGS. 43 to 46 are additional photographic perspective drawings of a series of maintenance steps at the rear panel; -
FIGS. 47 to 50 are additional photographic perspective drawings of a series of maintenance steps at the rare panel; -
FIGS. 51 to 53 are photographic perspective drawings of an apparatus trailer. - Referring to
FIG. 1 , a discussion of the present embodiment will now be provided. The present embodiment is a clean burningfurnace 10 which burns off gases and other emissions that a conventional furnace would release into the atmosphere. The present embodiment, utilizes a wood gasification process to produce highly efficient combustion in the present embodiment's dual fuel burn chambers. Generally speaking, the fuel or wood in the firebox burns from the bottom up, drying the top layer of wood in the firebox and forcing gases and exhaust into the lower burn chamber. In the brick lined lower chamber, these volatile gases are burned at temperatures as high as 2000° F. The firebrick lining in both burn chambers absorbs the heat and maintains burn chamber temperatures for consistent gas combustion. This high temperature gas combustion significantly lowers emissions, prevents creosote buildup, and minimizes ash buildup in the unit. After passing through the burn chamber, the excess air escapes through multiple flues running through a water jacket, which heats the water quickly and efficiently. The excess cools as it passes through the flues and as the exhaust leaves the chimney, temperatures of the gas exhaust have generally fallen to approximately 300° F. - The present embodiment includes a
roof 12, which covers the top portion of thefurnace 10, the furnace has afront wall 14, two equal but oppositeparallel side walls 16, aback wall 18, and alight 28 which extends below the eve of theroof 12. A pressurized sealedlocking door 24 is provided, thelocking door 24 providing access to the upper burn chamber to be discussed further below. Also on thefront wall 14 is a clean outdoor 26, for access to the lower ash chamber to be discussed below. Supporting the entire structure areanchor feet 22 which maintain the structure above grade. For transportation and moving, a plurality offorklifts sleeves 20 are arranged on the bottom floor of thefurnace 10. Generally speaking, the furnace is arranged along andaxial system 11, the axial system having avertical axis 5, arranged in the substantially vertical direction, and atransverse axis 9 arranged substantially 90 degrees away from the vertical axis, a longitudinal axis 7 arranged in the longitudinal direction at a 90° angle to the vertical and transverse axes respectively. - Return
FIG. 2 , a brief discussion of the inner chamber regions and burn/gasification process 40 will now be provided. In the burn/gasification process 40, the user will load the wood/fuel 42 into thefirebox 44 through the pressurized sealedlocking door 24 located at thefront wall 14. For full efficiency, theentire firebox chamber 44 will be filled withwood fuel 42. In one embodiment, thefirebox chamber 44 may be considered a primary combustion chamber. The wood, burns from the bottom up, drying the upper layers and the outer layers of the wood first. Thewood fuel 42 is maintained on an upper chamber firebrick seat 202 (FIG. 11 ) to be discussed below. The firebrick seat is made of afirebrick lining 46, and as the burn progresses in thefirebox 44, gases from the hottest part of the fire exhaust into the brick linedlower chamber 45. The gases pass through thefirebrick lining 46 and further combustion occurs within thelower burn chamber 45, which may be considered a secondary combustion chamber. The combustion temperatures in the lower burn chamber reach approximately 2000° F. As the fire progresses, the firebrick lining in both thefirebox chamber 44 and thelower burn chamber 45 absorb the heat help to maintain constant burn temperature within the respective chambers. - Superheated
exhaust air 48 exits through multiple boiler tube openings which run through the center of the water tank orwater jacket 52. These multiple boiler tubes ormultiple flues 50, are approximately ½″ in diameter, but may be maintained at a smaller diameter or a larger diameter depending upon the particular design. Furthermore, the flues may not be cylindrical tubes, but may be other cross-sectional geometric configurations such as a rectilinear configuration, square configuration, oval configuration and the like. Also, the tubes may vary in number from a single tube, to multiple small flues. In another embodiment, this arrangement may be “reversed,” such that the water is carried in tubes, and theflues 50 for carrying thesuperheated exhaust air 48 occupy the space surrounding these tubes. In different embodiments, one or more liquid conduits (e.g., tubes, jackets, tanks, etc.) may be positioned along the heat exchange path(s) of theflues 50 and may be configured and dimensioned to enable a heat exchange between theheated air 48 traveling through theflues 50 and liquids carried by the liquid conduits. Although described as water, the liquids carried within such liquid conduits may be any of a variety of liquids having substantial heat capacity. - The
superheated exhaust air 48 then travels through themultiple boiler flues 50 first along a vertical path, second along a forward looking longitudinally aligned horizontal path, then makes a 180° turn to travel along a third longitudinally aligned rearward looking horizontal path, then makes a 90° turn through the flue area 120 (FIG. 7 ) to travel along a vertical path up through the chimney. Thewater jacket 52 encompasses the first vertical path and the second and third horizontal paths. Heat transfer occurs throughout this elongated exhaust travel path providing for increased heat transfer efficiency. - Now referring to
FIGS. 3 and 4 , the clean burningfurnace 10 has a rear door panel 19 located on theback wall 18. Ablower 21 regulates the amount of intake air which feeds thefirebox 44 providing for the needed oxygen to maintain the superheated combustion process. Furthermore, although not shown in this particular embodiment, a water heater sensor interoperates with a control panel, to maintain a temperature range of approximately 150° Fahrenheit to 180° F. or a 30° differential. - When the heat sensor in the
water jacket 52 determines that the water temperature has fallen below its desired temperature range, the control panel sends a signal to theblower 21 to provide additional air intake oxygen to the fuel chamber orfirebox 44. Additionally, when the desired temperature range exceeds the 180° F. or a predetermined upper range, the control panel can send a signal to the blower to turn off all air intake into the firebox 44 thus lowering the burn rate and the corresponding heat transfer to thewater jacket 52. Referring toFIG. 4 , afront cutaway view 60 of thefurnace 10 shows a cross-sectional view of thelower burn chamber 45, thefirebox 44, and the horizontally aligned second and third travel paths for the superheated exhaust along theflues 50. - Presently, two embodiments are provided. Referring to
FIG. 5 , thefirst embodiment 72 as seen in the furnace property table 70 has a maximum furnace output per BTU/hour 75 of approximately 175,000 BTUs per hour. A second embodiment, 74, has approximately 350,000 BTUs per hour ofmaximum furnace output 75. These outputs correspond to variousphysical design parameters 71 shown in the furnace property table 70 including themaximum feeding area 76,total weight 78,body width 80,total depth 82,body depth 84,total height 86,chimney size 88,door size 90, andfirebox volume 92. - A more detailed discussion of the poetry on the
front wall 14 of thefurnace 10 will now be provided as seen inFIG. 6 . During units, thelights 28 will be on to warrant any potential users opening the pressure is to sealloading door 24 that's the furnace system in operation. When a user opens theloading door 24, asmoke curtain 58 is provided to keep flames from jumping outset of the furnace until theloading door 24 passes a certain opening degree, forsample 30°. On the inside face of theloading door 24 is a removableinner door panel 106. That the upper right hand corner of thefront wall 14 is acontrol panel 104. The control panel enables the user to monitor the water temperature and level in thewater jacket 52 by providing anyaqua Stat readout 102, also alights damper switch 100 is provided. - Also during cleanup, an automatic
smoke exit lid 110 is provided, enabling the user to access the 180° bend and empty the ash collecting in this bend, enabling cleanout procedures for theflues 50. At the lower portion of thefront wall 14 is anash cleanout door 108. This gives access to thesecondary burn chamber 45 and enables the user to remove the final ash deposits after the superheated gasification process. Referring toFIG. 7 , a more detailed discussion of the rear panel orback wall 18 will now be provided. - The back wall can be opened through a
rear access door 132. This enables the users to access theblower 138, as well as the flue flyash cleanout cover 122, thevarious drains 134 andsupply ports 128 as well as thereturn ports 126 and theash cleanout tray 124. Theash cleanout tray 124 is located behind thecleanout cover 122 and collects the ash which is carried by the exhaust process and deposited in theflue area 120. The user removes thecleanout cover 122, and then removes theash cleanout tray 124 with the ash deposits on the tray. Theflues 50 also known asheat exchangers 136 exit into theflue area 120. The remaining heat exhaust exits vertically through thechimney 32. Also, theblower 138 is arranged to cooperate with a solenoid 142 and adamper lid 140. Thetemperature probe 135 is also accessible at the back cover oraccess door 132. - Now, a brief discussion of the furnace operation as used in either an in-house environment or workshop environment will be provided. The circulation of the heated water within the
water jacket 52 is shown as seen inFIGS. 8 and 9 . Afurnace 10 can be utilized to provide hot water to a house 152 or for example ashop 154. The heated water is circulated throughrecirculation water lines 156. Arecirculation line 160 is shown with aninsulated supply line 162 feeding to afilter 164. Impurities are filtered out and apump 168 forces the water into thehot water tank 168. An optionalsidearm heat exchanger 170 is utilized. Water then exits through thehot water tank 168 and is transferred to theheat exchanger 172 or existingfurnace 174 which can utilize the heat in a forced air scenario to heat a home. The hot water line can also be circulated to a plurality of parallelfloor heating pipes 180, with the water being recalculated back to the furnace through arecirculation line 182 which returns the cool water to thefurnace 10 for reheating inside of thewater jacket 52. - A brief discussion of the first 72 and second 74 embodiments as seen in a second furnace table 182 provides additional information with regard to the
physical design parameters 71. Additional physical design parameters include the maximum average outputs in BTUs per hour of a full load ofwood burning duration 184,maximum log length 186,furnace width 188,furnace length 190,water capacity 192, andshipping weight 194. - Referring to
FIGS. 12 and 13 , a discussion of the assembly of the front and rear panel's will now be provided.FIG. 12 shows arear panel assembly 230 where theinsulated door panel 232 is shown in exploded view. Similarly,FIG. 13 shows a frontpanel wall assembly 240 where the insulatedfront door panel 242 is shown in exploded view. Referring now toFIG. 14A , a furnace front elevation 215 is shown, andFIG. 14B shows afurnace side elevation 260.FIG. 14C shows a furnace orrear elevation 270 with a back panel hiddendoor detail 280 as seen inFIG. 14D . - As previously discussed, the firebrick configuration within the upper chamber or
firebox 44 and thelower chamber 45 enables the downdraft to occur while also maintaining a specific level of heat for prolonged periods of time. The firebrick's act as heat sinks to maintain a more level temperature, as well as provide the structural support for the wood fuel within thefirebox 44 and also provide the structural support and configuration for the lower burn chamber. Because of the need for specialized downdraft venting, the present embodiments utilize strategically placed downdraft brick flues enabling for a more efficient burn and combustion to occur. Furthermore, an efficient configuration for collecting the ash removes the ash particulate from the burn zone and creates a free and clear burn cavity for constant and consistent combustion. - Referring to
FIG. 11 , a discussion of the general arrangement of thefirebrick 200 will be provided. The wood fuel is maintained on an upper chamber fireboxseat 202. Generally, thefirebox seat 202 is conFig.d with outwardly sloppingfirebox sidewall bricks 204 and transversely aligned brick grading which runs longitudinally along on-edge along the length of the firebox. The outwardly slopingfirebox sidewall bricks 204 lay flat and the slope provides for settling of the burned fuel to the bottom seat of thefirebox 202. The transversely aligned brick grading 210 arranged along the longitudinal axis 7 is spaced with a plurality of equidistantdowndraft brick flues 208. Thedowndraft brick flues 208 provide for the transfer of the exhaust into thelower burn chamber 45. - The
lower burn chamber 45 is defined by longitudinally aligned sailor standingsidewall bricks 212, afront wall 213, and a bottom slope ash channel series of longitudinally alignedbricks 224. Theseash channel bricks 224 define thefront ash chamber 226. At the rear end of thefirebrick arrangements 200 is arear ash chamber 214. This is defined by a rear ash chamber backwall 220, rareash chamber sidewalls 218, and the extension of the bottom slopeChannel ash bricks 224. An ash chamberfront wall 216 is also provided. In the present configuration, for shipping, transportation stabilization blocks 222 are provided spanning from sidewall to sidewall in the lower chamber to maintain stability of the sailor standing brick sidewall during transportation. - To maintain the heat within the furnace, insulation panels are provided on the outside face of the firebrick to reflect and insulate the heat within the firebox.
- Referring to
FIGS. 15 and 16 , a firebrick insulated panel arrangement in an explodedview 290 is shown inFIG. 15 , and a firebrick insulated panel assembledposition 320 shown inFIG. 16 . The insulated panel's follow the same outside slope lines of thefirebrick arrangement 200 as seen inFIG. 11 . In the upper chamber region, two equal but opposite longitudinally aligned insulatingslope walls 300 support the slopedsidewall brick 204 of the firebox. - Running vertically are two front ash
chamber insulating sidewalls 302 which are seated on two longitudinally aligned front ash chamber sloped insulatingfront walls 310 which terminate at a front ash chamber insulatingbottom wall 212. Along the top vertical edge of the front ashchamber side walls 302 are placedgrate rails 296 supported by a rail posts 298. - The transversely aligned brick grating 210,
FIG. 11 , rests on the grate rails 296. The rear ash chamber is insulated by a rear ash chamber backwall 304, two equal but opposite rear ashchamber side walls 306, and a rear ash chamber slopedbottom wall 308 terminating at the front ash chamberbottom wall 312. Also, a rear ash chamberfront wall 314 is provided. - A front insulating
panel 292 is positioned to close the front edge of thelower burn chamber 45, and has an ashchamber cleanout port 294 through which the ash can be removed. - Discussing a first embodiment arrangement of the firebrick and brick insulation, as seen in
FIGS. 17 and 18 , afirebrick front elevation 330 is provided with two slopedsidewalls 204 resting on a transversely aligned brick grating 210. A lower combustion chambersailor brick walls 212 frame the lower combustion chamber. A lower combustion chamberfront wall 211 is seated below at theend grating unit 210 and the supported by the bottom slopingash channel bricks 224. - The first embodiments of the
firebrick front elevation 330 is suitable within the first embodiment of the firebrick insulation forelevation 340. - Referring to
FIGS. 19 , 20, and 21, a second embodiment of the firebrick arrangement is shown as seen infront elevation 350FIG. 19 , and assembledperspective view 350 as seen inFIG. 20 , and in explodedperspective view 360 as seen inFIG. 21 . - Here in the second embodiment of the
firebox seat 352 utilizes the same general configuration as the first embodiment, and has arear ash chamber 354. Referring toFIG. 21 , to maintain equidistant spacing between the brick grating 210, flue brickair gap spacers 362 and 364 are placed between the transversely alignedbricks 210 to create the air transfer space for the downdraft of the exhaust. Thelower burn chamber 45 is divided into two regions, an uppergas combustion region 366, and alower ash chamber 226. The uppergas combustion region 366 in this second embodiment, is flanked by two inwardly leaning longitudinally alignedbrick side walls 361. - Referring to
FIGS. 22 and 23 , and discussing the first embodiment of the firebox as seen inperspective view 370,FIG. 22 , and explodedperspective view 380 as seen inFIG. 23 , the first embodiment of thefirebox seat 372 provides for the seating of the fuel wood in the lower region of the firebox or first burn chamber. A plurality of flue brickair gap spacers lower burn chamber 45. The previously mentioned sailor standingside walls 212 flank the burn chamber and stand on the frontlower ash chamber 388. Thelower burn chamber 45 is also composed of an uppergas combustion region 386 and the frontlower ash chamber 388. -
FIGS. 24 to 31 show auser 394 accessing theash cleanout door 108 of thefurnace 10 and performing acleanout process 390. Theuser 394 utilizes anash cleanout bucket 392 and anash hoe 396. The ash hoe has ahoe shoe 402 which is conFig.d to the same trapezoidal shape as thelower ash chamber 388. Theash 398 is easily removed from the lower ash chamber. This process occurs once every two weeks. -
FIGS. 32 through 50 shown theuser 394 accessing theflue cleanout panel 408 to perform cleanout maintenance on the horizontally aligned to fluetubes 50. InFIG. 48 , the user utilizes a wire brush and flexible drive drill 500 to cleanout the flewtubes 50. Lastly inFIGS. 51 through 53 , afurnace trailer 510 is provided for transportation of the furnace when used in multiple locations.
Claims (1)
1. A furnace comprising:
a housing having a front wall, a rear wall and two side walls; and
a primary combustion chamber positioned within the housing;
a secondary combustion chamber disposed beneath the primary combustion chamber within the housing, the secondary combustion chamber arranged to enable the combustion of gases and other combustion products from the primary combustion chamber;
a heat exchanger positioned within the housing, the heat exchanger including:
a plurality of vertically-oriented flues configured to form a vertical heat exchange path, the vertically-oriented flues arranged to carry heated air from the secondary combustion chamber towards a top of the housing;
a first plurality of horizontally-oriented flues configured to form a first horizontal heat exchange path, the first plurality of horizontally-oriented flues fluidly coupled to the vertically-oriented flues and arranged to carry the heated air from proximate the rear wall of the housing to proximate the front wall;
a second plurality of horizontally-oriented flues configured to form a second horizontal heat exchange path, the second plurality of horizontally-oriented flues fluidly coupled to the first plurality of horizontally-oriented flues and arranged to carry the heated air from proximate the front wall of the housing to proximate the front wall; and
one or more liquid conduits positioned along the vertical heat exchange path, the first horizontal heat exchange path, and the second horizontal heat exchange path, the liquid conduits configured and dimensioned to enable a heat exchange between the heated air and liquids carried by the liquid conduits; and
a chimney fluidly coupled to the second plurality of horizontally-oriented flues.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US12/322,853 US20130112119A9 (en) | 2008-02-05 | 2009-02-05 | Clean burning furnace method and apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US2646608P | 2008-02-05 | 2008-02-05 | |
US12/322,853 US20130112119A9 (en) | 2008-02-05 | 2009-02-05 | Clean burning furnace method and apparatus |
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Publication Number | Publication Date |
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US20100018443A1 true US20100018443A1 (en) | 2010-01-28 |
US20130112119A9 US20130112119A9 (en) | 2013-05-09 |
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US12/322,853 Abandoned US20130112119A9 (en) | 2008-02-05 | 2009-02-05 | Clean burning furnace method and apparatus |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100083883A1 (en) * | 2008-10-06 | 2010-04-08 | Neil Hofer | Solid Fuel Boiler Assembly |
WO2013026990A1 (en) * | 2011-08-24 | 2013-02-28 | Areva Renouvelables | Triple-flow lignocellulosic-biomass burner that generates combustion gases having a controlled oxygen content |
US20160102865A1 (en) * | 2014-10-14 | 2016-04-14 | Richard Bolton | Down-draft heating device |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9745867B1 (en) * | 2016-07-25 | 2017-08-29 | Loren R. Eastland | Compound energy co-generation system |
RU205811U1 (en) * | 2020-09-08 | 2021-08-11 | Марк Семенович Солонин | WET CHIPS COMBUSTION DEVICE |
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US5413088A (en) * | 1993-01-13 | 1995-05-09 | Oviatt; William T. | Wood burning heating unit |
US20080035137A1 (en) * | 2006-08-10 | 2008-02-14 | Clean Wood Heat, Llc | Combustion apparatus |
US20080223266A1 (en) * | 2007-03-13 | 2008-09-18 | Central Boiler, Inc. | Wood fired boiler |
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US351338A (en) * | 1886-10-19 | Steam-boiler and furnace | ||
US1607458A (en) * | 1926-11-16 | Eurhace | ||
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US2433036A (en) * | 1943-05-14 | 1947-12-23 | Univ Illinois | Down-draft furnace |
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US4213443A (en) * | 1978-03-13 | 1980-07-22 | All Nighter Stove Works, Inc. | Stove construction |
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Publication number | Priority date | Publication date | Assignee | Title |
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US20100083883A1 (en) * | 2008-10-06 | 2010-04-08 | Neil Hofer | Solid Fuel Boiler Assembly |
WO2013026990A1 (en) * | 2011-08-24 | 2013-02-28 | Areva Renouvelables | Triple-flow lignocellulosic-biomass burner that generates combustion gases having a controlled oxygen content |
FR2979415A1 (en) * | 2011-08-24 | 2013-03-01 | Thermya | LIGNOCELLULOSIC BIOMASS BURNER WITH TRIPLE FLOW WITH GENERATION OF COMBUSTION GAS WITH CONTROLLED OXYGEN CONTENT. |
US20160102865A1 (en) * | 2014-10-14 | 2016-04-14 | Richard Bolton | Down-draft heating device |
Also Published As
Publication number | Publication date |
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US20130112119A9 (en) | 2013-05-09 |
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AS | Assignment |
Owner name: PRO-FAB INDUSTRIES INC., CANADA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PLETT, DELMER;REEL/FRAME:023321/0143 Effective date: 20090930 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |