US2197792A - Coal spraying chute - Google Patents
Coal spraying chute Download PDFInfo
- Publication number
- US2197792A US2197792A US178353A US17835337A US2197792A US 2197792 A US2197792 A US 2197792A US 178353 A US178353 A US 178353A US 17835337 A US17835337 A US 17835337A US 2197792 A US2197792 A US 2197792A
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- US
- United States
- Prior art keywords
- chute
- coal
- spraying
- chamber
- spray
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- 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.)
- Expired - Lifetime
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L10/00—Use of additives to fuels or fires for particular purposes
- C10L10/14—Use of additives to fuels or fires for particular purposes for improving low temperature properties
Definitions
- the present invention relates to apparatus for spraying fuel such as coal and the like with oil or wax for the purpose of dust-proofing and more particularly relates to apparatus for treating 5 coal having a large percentage oi extremely iine particles, such as slack.
- Apparatus for spraying coal with oil or wax which consists of nozzles located near the end of a conveyor or boom for directing oil or wax spray against the coal as it falls due to the action of gravity, is known.
- Such apparatus is not perfect in its operation, however, when coal having a large percentage of very fine particles is being treated, for the reason ⁇ that a relatively thick batch of very fine particles is not thinly enough distributed to permit the treating spray to reach all portions thereof.
- the' foregoing diiliculties are eliminated by providing a vertical chute which is bailled to thinly distribute coal passing downwardly therethrough.
- Oil spraying nozzles are associated with the chute and bailies in such a manner that spray reaches all portions of the coal.
- An object of the invention is to provide a device for spraying coal with oil or the like for dustproong purposes by directing a spray of the treating material against coal as it falls due to the action of gravity.
- Another object of the invention is to baille coal as it falls due to the action of gravity to thinly distribute the same and to simultaneously apply a dust-prooug spray thereto.
- a further object of the invention is to restrict downwardly falling coal so that it is thinly distributed and to apply a spray of dust-proofing material to the same while it is in a thinly distributed state.
- a still further object of the invention is to 46 thinly distribute free falling coal while it is in a chamber and to apply heat to the chamber while a dust-prooilng spray is directed against the coal,
- Fig. 1 is a diagram of a vertical section of the invention taken to one side of the center line thereof.
- Fig. 2 is a diagram of a vertical section of another form of the invention taken to one side of the center line thereof.
- the reference character I indicates a hopper communi- 56 cating with a vertical chute 2.
- a plurality of downwardly inclined baiies 5. 'I'he v bailles 5 are secured fixedly to the walls of the chute 2 and are vertically spaced one from the other, arranged in a staggered relation so that coal is bailled back and forth from one side of the chute to the other.
- each baiiie 5 Disposed below each baiiie 5 is a spraying nozzle 6 connected to a suitable spraying mechanism v for directing a spray of dust-proofing material against the coal as it falls downwardly through the chute 2.
- Each nozzle 6 communicates through a pipe 'l with themain spraying material pipe line 8.
- Contiguous with the pipe lines l' and 8 is a continuous tube 9 through which circulates a hot oil or its equivalent for the purpose of maintaining the pipe lines 'l and 9 heated so that the coal spraying material therein willl be kept at anelevated temperature and will not solidify or congeal and' for the purpose of elevating the temperature of the system at the beginning of a treating operation.
- the tube 9 extends into the chute ⁇ 2 adjacent each of the nozzles 6 providing heat radiating coils Ml.
- the heating coils IU heat the interiorof the chute 2 adjacent the nozzles 6 and thereby maintain the material being directed from the nozzle Brat an elevated temperature until it strikes the coal being treated.
- the treating material is very frequently wax or heavily viscous oil, the use of the heating coil I0 during extremely cold weather prevents the treating material from congealing or solidifying before it strikes the coal. All pipe and ,tube lines are covered with heat insulation I I.
- hopper I communicates with a chute I 5 and a shut-oi member 3 supported on.
- a guide l controls the opening between the hopper I and the chute I5.
- Disposed within the chute 2 are two pairs of vertically spaced bailles I6 and I1.
- Ihe bailles of the pair I6 are opposed to each other and of the pair I 1 are opposed to each other, each air having its bailles downwardlyinclined and being spaced apart to provide a restricted space therebetween.
- the pairs of bailles I6 and I1 deilne a chamber I l into which spraying nozzles Il are projected.
- the nozzles I l direct a spray of coal treating material against the coal as it falls downwardly through the chamber I8 in a thinly distributed state.
- a layer of insulating material I9 On each side of the chamber I8 is disposed a layer of insulating material I9. Also on each side of the chamber I8 is disposed a box 20, for permitting access to the nozzles I4 for inspection, cleaning, etc.
- the connection between thei main pipe line 8 and the nozzles I4 is provided by pipe lines 2I and as in the case of Fig. 1 a continuous tubing 9 through which is circulated a hot oil or its equivalent is disposed contiguous with the main pipe line 8 and the pipe lines 2
- the pipe lines 8 and 2l as well as the boxes 20 are provided with a coating of insulating material 22 in order to prevent the loss of heat.
- a device of the character described comprising a substantially vertical chute, a plurality of vertically spaced baflies disposed in said chute, characterized by their ability to permit the downward passage through said chute of pieces such as coal or the like, spraying means projecting laterally into said chute, and a heating coil within said chute contiguous with said spraying means, warming the atmosphere in said chute, said coil being guarded by one of said baffles, whereby the pieces falling downwardly through said chute are sprayed.
- a device of the character described comprising a substantially vertical, enclosed chute, a plurality of vertically spaced baffles therein characterized by their ability to permit the downward passage through said chute of pieces such as coal or the like. spraying nozzles for directing spray.
- a device of the character described comprising a substantially vertical, enclosed chute.' two pairs of vertically spaced bafiles therein, the bailles of each pair projecting toward each other g from opposite sides of the chute, one pair of said barangs being vertically spaced from the other pair thereof, said pairs of baflles defining with said chute a chamber having a restricted opening at the top and bottom thereof, the restricted openings deflned by said pairs of baflles being characterized by their ability to permit the downward passage of pieces-such as coal or the like through l said chute, means for directing a spray into said chamber against pieces falling downwardly through said chute, and means vfor heating the interior of said chamber.
- a device of the character described comprising a substantially vertical, enclosed chute, two pairs of vertically spaced bailes therein, the bafiles of each pair projecting toward each other from opposite sides of the chute, onepair of said bailles being vertically spaced from the other pair thereof, said pairs of baffles defining with said chute a chamber having a restricted opening at the top and bottom thereof, the restricted openings defined by said pairs of baliles being characterized by their ability to permit the downwardl passage of pieces such as coal or the like through said chute, nozzles for projecting a spraylaterally into said chamber, inspection means associated with the sides of said chute for permitting inspection and adjustment of said nozzles, and means for heating the interior of said chamber.
- a device of the character described comprising a substantially vertical, enclosed chute, two pairs of vertically spaced baflles therein, the baffles of each pair projecting toward each other from opposite sides of the chute, one pair of said baflles being vertically spaced fromthe other pair thereof, said pairs of baffles defining with said chute a chamber having a restricted opening at the top, and bottom thereof, the restricted open- -said chute, and means for directing a spray into v said chamber against pieces falling downwardly through said chute.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Description
J. A. ERICKSON 2,197,792
COAL SPRAYING CHUTE April 23, 1940.l
Filed Dec. 6, 1937 Patented Apr. 23, 1940 UNITED STATES PATENT OFFICE Claims.
The present invention relates to apparatus for spraying fuel such as coal and the like with oil or wax for the purpose of dust-proofing and more particularly relates to apparatus for treating 5 coal having a large percentage oi extremely iine particles, such as slack.
Apparatus for spraying coal with oil or wax which consists of nozzles located near the end of a conveyor or boom for directing oil or wax spray against the coal as it falls due to the action of gravity, is known. Such apparatus is not perfect in its operation, however, when coal having a large percentage of very fine particles is being treated, for the reason` that a relatively thick batch of very fine particles is not thinly enough distributed to permit the treating spray to reach all portions thereof.
According to the present invention the' foregoing diiliculties are eliminated by providing a vertical chute which is bailled to thinly distribute coal passing downwardly therethrough. Oil spraying nozzles are associated with the chute and bailies in such a manner that spray reaches all portions of the coal. i
An object of the invention is to provide a device for spraying coal with oil or the like for dustproong purposes by directing a spray of the treating material against coal as it falls due to the action of gravity.
Another object of the invention is to baille coal as it falls due to the action of gravity to thinly distribute the same and to simultaneously apply a dust-prooug spray thereto.
A further object of the invention is to restrict downwardly falling coal so that it is thinly distributed and to apply a spray of dust-proofing material to the same while it is in a thinly distributed state.
A still further object of the invention is to 46 thinly distribute free falling coal while it is in a chamber and to apply heat to the chamber while a dust-prooilng spray is directed against the coal,
These and other objects will be apparent from the following specication when taken with the accompanying drawing, in which:
Fig. 1 is a diagram of a vertical section of the invention taken to one side of the center line thereof. and
Fig. 2 is a diagram of a vertical section of another form of the invention taken to one side of the center line thereof.
Referring particularly to the drawing, the reference character I indicates a hopper communi- 56 cating with a vertical chute 2. At the junction a plurality of downwardly inclined baiies 5. 'I'he v bailles 5 are secured fixedly to the walls of the chute 2 and are vertically spaced one from the other, arranged in a staggered relation so that coal is bailled back and forth from one side of the chute to the other.
Disposed below each baiiie 5 is a spraying nozzle 6 connected to a suitable spraying mechanism v for directing a spray of dust-proofing material against the coal as it falls downwardly through the chute 2. Each nozzle 6 communicates through a pipe 'l with themain spraying material pipe line 8. Contiguous with the pipe lines l' and 8 is a continuous tube 9 through which circulates a hot oil or its equivalent for the purpose of maintaining the pipe lines 'l and 9 heated so that the coal spraying material therein willl be kept at anelevated temperature and will not solidify or congeal and' for the purpose of elevating the temperature of the system at the beginning of a treating operation. As shown particularly in the drawing, the tube 9 extends into the chute `2 adjacent each of the nozzles 6 providing heat radiating coils Ml. The heating coils IU heat the interiorof the chute 2 adjacent the nozzles 6 and thereby maintain the material being directed from the nozzle Brat an elevated temperature until it strikes the coal being treated. As the treating material is very frequently wax or heavily viscous oil, the use of the heating coil I0 during extremely cold weather prevents the treating material from congealing or solidifying before it strikes the coal. All pipe and ,tube lines are covered with heat insulation I I.
Referring to Fig. 2 in the drawing there is disclosed another embodiment of the invention. 'I'he hopper I communicates with a chute I 5 and a shut-oi member 3 supported on. a guide l controls the opening between the hopper I and the chute I5. Disposed within the chute 2 are two pairs of vertically spaced bailles I6 and I1. Ihe bailles of the pair I6 are opposed to each other and of the pair I 1 are opposed to each other, each air having its bailles downwardlyinclined and being spaced apart to provide a restricted space therebetween. The pairs of bailles I6 and I1 deilne a chamber I l into which spraying nozzles Il are projected. The nozzles I l direct a spray of coal treating material against the coal as it falls downwardly through the chamber I8 in a thinly distributed state. By having the nozzles -Il on opposite sides of the chute I5 both sides of the sheet of coal as it falls downwardly through the chute I5 are treated simultaneously.
On each side of the chamber I8 is disposed a layer of insulating material I9. Also on each side of the chamber I8 is disposed a box 20, for permitting access to the nozzles I4 for inspection, cleaning, etc. The connection between thei main pipe line 8 and the nozzles I4 is provided by pipe lines 2I and as in the case of Fig. 1 a continuous tubing 9 through which is circulated a hot oil or its equivalent is disposed contiguous with the main pipe line 8 and the pipe lines 2| to raise the temperature of the same on starting and to maintain the same at an elevated temperature. The pipe lines 8 and 2l as well as the boxes 20 are provided with a coating of insulating material 22 in order to prevent the loss of heat.
From the foregoing description it will be apparent that I have provided a device which provides the coal in thinly distributed sheets thereby resulting in a greater coverage by the dust-proofing material than is possible by merely applying a spray to one side of the coal as it falls from an endless conveyor belt. While the foregoing embodiments of the invention set forth structure wherein the coal falls through a vertical chute, it may be expedient in some cases to use a slightly inclined but bafiled chute although in such a case it is obvious that the degree of coverage by the spraying material would not be as great as it is in the disclosed forms of the invention. However, such an incline when bale'd is considered to be within the scope of the present invention. Also, while the devices comprising the invention are particularly adaptable for dust-proofing coal having a large percentage of fine particles, they may be used for spraying any material which will ow through a chute whether it be fordust-prooflng or not.
Having thus described my invention, what I desire to secure by Letters Patent and claim is:
1. A device of the character described, comprisinga substantially vertical chute, a plurality of vertically spaced baflies disposed in said chute, characterized by their ability to permit the downward passage through said chute of pieces such as coal or the like, spraying means projecting laterally into said chute, and a heating coil within said chute contiguous with said spraying means, warming the atmosphere in said chute, said coil being guarded by one of said baffles, whereby the pieces falling downwardly through said chute are sprayed.
2. A device of the character described, comprising a substantially vertical, enclosed chute, a plurality of vertically spaced baffles therein characterized by their ability to permit the downward passage through said chute of pieces such as coal or the like. spraying nozzles for directing spray.
laterally into said chute for spraying pieces falling downwardly through said chute, and heating coils within said chute and contiguous with said nozzles for heating the interior of said chute.
3. A device of the character described, comprising a substantially vertical, enclosed chute.' two pairs of vertically spaced bafiles therein, the bailles of each pair projecting toward each other g from opposite sides of the chute, one pair of said baiiles being vertically spaced from the other pair thereof, said pairs of baflles defining with said chute a chamber having a restricted opening at the top and bottom thereof, the restricted openings deflned by said pairs of baflles being characterized by their ability to permit the downward passage of pieces-such as coal or the like through l said chute, means for directing a spray into said chamber against pieces falling downwardly through said chute, and means vfor heating the interior of said chamber.
4. A device of the character described, comprising a substantially vertical, enclosed chute, two pairs of vertically spaced bailes therein, the bafiles of each pair projecting toward each other from opposite sides of the chute, onepair of said bailles being vertically spaced from the other pair thereof, said pairs of baffles defining with said chute a chamber having a restricted opening at the top and bottom thereof, the restricted openings defined by said pairs of baliles being characterized by their ability to permit the downwardl passage of pieces such as coal or the like through said chute, nozzles for projecting a spraylaterally into said chamber, inspection means associated with the sides of said chute for permitting inspection and adjustment of said nozzles, and means for heating the interior of said chamber.
5. A device of the character described, comprising a substantially vertical, enclosed chute, two pairs of vertically spaced baflles therein, the baffles of each pair projecting toward each other from opposite sides of the chute, one pair of said baflles being vertically spaced fromthe other pair thereof, said pairs of baffles defining with said chute a chamber having a restricted opening at the top, and bottom thereof, the restricted open- -said chute, and means for directing a spray into v said chamber against pieces falling downwardly through said chute.
lJOHN A. ERICKSON.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US178353A US2197792A (en) | 1937-12-06 | 1937-12-06 | Coal spraying chute |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US178353A US2197792A (en) | 1937-12-06 | 1937-12-06 | Coal spraying chute |
Publications (1)
Publication Number | Publication Date |
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US2197792A true US2197792A (en) | 1940-04-23 |
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US178353A Expired - Lifetime US2197792A (en) | 1937-12-06 | 1937-12-06 | Coal spraying chute |
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Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2420368A (en) * | 1944-06-20 | 1947-05-13 | Giordano Joseph | Apparatus for coating aggregates |
US2511290A (en) * | 1942-05-01 | 1950-06-13 | Us Sec War | Method of impregnating activated carbon |
US2563475A (en) * | 1951-08-07 | Apparatus fob treating granular | ||
US2658847A (en) * | 1949-07-26 | 1953-11-10 | Oregon State | Method of making composite, consolidated products and apparatus therefor |
US2658796A (en) * | 1950-04-27 | 1953-11-10 | Kopperschmidt Wilhelm | Hot-spraying method and apparatus |
US2719093A (en) * | 1952-06-03 | 1955-09-27 | William H Voris | Methods of applying plastic coatings |
US2761420A (en) * | 1953-07-13 | 1956-09-04 | Long Bell Lumber Company | Apparatus for applying sprayable materials to solid particles |
US2799242A (en) * | 1953-11-20 | 1957-07-16 | Cain Paul Emerson | Automatic salting machine |
US2865785A (en) * | 1955-04-06 | 1958-12-23 | Calcinator Corp | Methods of coating catalyst carriers |
US2990807A (en) * | 1959-02-20 | 1961-07-04 | Cons Vacuum Corp | Apparatus for coating particles |
US3101040A (en) * | 1957-07-15 | 1963-08-20 | Ralston Purina Co | Apparatus for manufacturing stable pelleted foods |
US3400011A (en) * | 1964-09-30 | 1968-09-03 | Chevron Res | Method of coating water-soluble particles |
US3485600A (en) * | 1967-09-12 | 1969-12-23 | Louie H Robertson | Manufacture of dust-proof charcoal adsorbent fines and briquettes made therefrom |
US3707136A (en) * | 1970-12-02 | 1972-12-26 | Continental Oil Co | Apparatus for plating heat-resistant articles |
US3716020A (en) * | 1970-09-29 | 1973-02-13 | Stamicarbon | Apparatus for coating granules with a thin dense layer |
US3938469A (en) * | 1972-02-28 | 1976-02-17 | American Cyanamid Company | Apparatus for coating particulate material with finely divided solids |
US4511603A (en) * | 1983-12-19 | 1985-04-16 | The Dow Chemical Company | Addition of additives to plastics |
US4751098A (en) * | 1986-07-22 | 1988-06-14 | Westinghouse Electric Corp. | Reoxidation of partially oxidizable powders |
US4921674A (en) * | 1988-09-06 | 1990-05-01 | Enos Quentin M | Gravity feed apparatus and method for fumigation, detoxification and nutrification of plant seed |
US6361604B2 (en) * | 1999-05-11 | 2002-03-26 | Chemical Lime Company | Apparatus for adding oil or other liquids to a dry bulk powder |
WO2002050220A1 (en) * | 2000-12-21 | 2002-06-27 | Ve Gruppen A/S | Method and system for production of fuel pellets and fuel pellet |
US6485569B1 (en) | 2000-07-11 | 2002-11-26 | Beta Raven, Inc. | Spray chamber and system and method of spray coating solid particles |
US20060096167A1 (en) * | 2001-10-10 | 2006-05-11 | Dunlop Donald D | Process for in-situ passivation of partially-dried coal |
US20100263269A1 (en) * | 2001-10-10 | 2010-10-21 | River Basin Energy, Inc. | Process for Drying Coal |
WO2011057608A1 (en) * | 2009-11-10 | 2011-05-19 | Firestixx Holz-Energie Gmbh | Method and device for processing a dry fuel |
US8956426B2 (en) | 2010-04-20 | 2015-02-17 | River Basin Energy, Inc. | Method of drying biomass |
US9057037B2 (en) | 2010-04-20 | 2015-06-16 | River Basin Energy, Inc. | Post torrefaction biomass pelletization |
-
1937
- 1937-12-06 US US178353A patent/US2197792A/en not_active Expired - Lifetime
Cited By (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2563475A (en) * | 1951-08-07 | Apparatus fob treating granular | ||
US2511290A (en) * | 1942-05-01 | 1950-06-13 | Us Sec War | Method of impregnating activated carbon |
US2420368A (en) * | 1944-06-20 | 1947-05-13 | Giordano Joseph | Apparatus for coating aggregates |
US2658847A (en) * | 1949-07-26 | 1953-11-10 | Oregon State | Method of making composite, consolidated products and apparatus therefor |
US2658796A (en) * | 1950-04-27 | 1953-11-10 | Kopperschmidt Wilhelm | Hot-spraying method and apparatus |
US2719093A (en) * | 1952-06-03 | 1955-09-27 | William H Voris | Methods of applying plastic coatings |
US2761420A (en) * | 1953-07-13 | 1956-09-04 | Long Bell Lumber Company | Apparatus for applying sprayable materials to solid particles |
US2799242A (en) * | 1953-11-20 | 1957-07-16 | Cain Paul Emerson | Automatic salting machine |
US2865785A (en) * | 1955-04-06 | 1958-12-23 | Calcinator Corp | Methods of coating catalyst carriers |
US3101040A (en) * | 1957-07-15 | 1963-08-20 | Ralston Purina Co | Apparatus for manufacturing stable pelleted foods |
US2990807A (en) * | 1959-02-20 | 1961-07-04 | Cons Vacuum Corp | Apparatus for coating particles |
US3400011A (en) * | 1964-09-30 | 1968-09-03 | Chevron Res | Method of coating water-soluble particles |
US3485600A (en) * | 1967-09-12 | 1969-12-23 | Louie H Robertson | Manufacture of dust-proof charcoal adsorbent fines and briquettes made therefrom |
US3716020A (en) * | 1970-09-29 | 1973-02-13 | Stamicarbon | Apparatus for coating granules with a thin dense layer |
US3707136A (en) * | 1970-12-02 | 1972-12-26 | Continental Oil Co | Apparatus for plating heat-resistant articles |
US3938469A (en) * | 1972-02-28 | 1976-02-17 | American Cyanamid Company | Apparatus for coating particulate material with finely divided solids |
US4511603A (en) * | 1983-12-19 | 1985-04-16 | The Dow Chemical Company | Addition of additives to plastics |
US4751098A (en) * | 1986-07-22 | 1988-06-14 | Westinghouse Electric Corp. | Reoxidation of partially oxidizable powders |
US4921674A (en) * | 1988-09-06 | 1990-05-01 | Enos Quentin M | Gravity feed apparatus and method for fumigation, detoxification and nutrification of plant seed |
US6361604B2 (en) * | 1999-05-11 | 2002-03-26 | Chemical Lime Company | Apparatus for adding oil or other liquids to a dry bulk powder |
US6485569B1 (en) | 2000-07-11 | 2002-11-26 | Beta Raven, Inc. | Spray chamber and system and method of spray coating solid particles |
WO2002050220A1 (en) * | 2000-12-21 | 2002-06-27 | Ve Gruppen A/S | Method and system for production of fuel pellets and fuel pellet |
US20060096167A1 (en) * | 2001-10-10 | 2006-05-11 | Dunlop Donald D | Process for in-situ passivation of partially-dried coal |
US7695535B2 (en) | 2001-10-10 | 2010-04-13 | River Basin Energy, Inc. | Process for in-situ passivation of partially-dried coal |
US20100263269A1 (en) * | 2001-10-10 | 2010-10-21 | River Basin Energy, Inc. | Process for Drying Coal |
US8197561B2 (en) | 2001-10-10 | 2012-06-12 | River Basin Energy, Inc. | Process for drying coal |
WO2011057608A1 (en) * | 2009-11-10 | 2011-05-19 | Firestixx Holz-Energie Gmbh | Method and device for processing a dry fuel |
EP2325289A1 (en) * | 2009-11-10 | 2011-05-25 | FireStixx Holz-Energie GmbH | Method and device for processing a solid fuel |
US8956426B2 (en) | 2010-04-20 | 2015-02-17 | River Basin Energy, Inc. | Method of drying biomass |
US9057037B2 (en) | 2010-04-20 | 2015-06-16 | River Basin Energy, Inc. | Post torrefaction biomass pelletization |
US9988588B2 (en) | 2010-04-20 | 2018-06-05 | River Basin Energy, Inc. | Post torrefaction biomass pelletization |
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