US1670606A - Furnace more particularly for drying fuel - Google Patents
Furnace more particularly for drying fuel Download PDFInfo
- Publication number
- US1670606A US1670606A US222058A US22205827A US1670606A US 1670606 A US1670606 A US 1670606A US 222058 A US222058 A US 222058A US 22205827 A US22205827 A US 22205827A US 1670606 A US1670606 A US 1670606A
- Authority
- US
- United States
- Prior art keywords
- furnace
- chamber
- burners
- length
- fuel
- 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.)
- Expired - Lifetime
Links
- 238000001035 drying Methods 0.000 title description 11
- 239000000446 fuel Substances 0.000 title description 11
- 239000000463 material Substances 0.000 description 16
- 239000007789 gas Substances 0.000 description 10
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000011819 refractory material Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 206010022000 influenza Diseases 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/02—Heating arrangements using combustion heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
- F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
- F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
- F26B15/14—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of materials being carried by trays or racks or receptacles, which may be connected to endless chains or belts
Definitions
- .ihis invention has reference to furnaces for drying and making materials at definitely regulated ten'iperatures and its primary object is to provide a continuously operating furnace which shall be especially suited to the drying and baking of briquettes, ovoids and the like of fuel compounded from materials such as anthracite duff and other carbonaceous materials mixed with a suitable wet binder.
- a continuously operating furnace which shall be especially suited to the drying and baking of briquettes, ovoids and the like of fuel compounded from materials such as anthracite duff and other carbonaceous materials mixed with a suitable wet binder.
- the temperature at which the drying and baking is effected should be carefully controlled as excessive heat might engender carbonizing ofthe material with detrimental results.
- the invention comprises an elongated furnace chamber heated by a plurality of individually controlled gas burners, continuously operating means for conveying the material to bebaked through the length of the chamber, and a plurality of individually adjustable outlets or fiuesspaced along the length of the furnace, these latter and the burners enabling the temperatures encountered by the material under treatment to be regulated as required.
- a bafi'le or screen is located between the burners and the out lets and the material being treated is carried by a conveyor along a path just below said baffle.
- Pyrometers may be provided at various points in the furnace chamber to guide the operator in the adjustments required to control the temperature.
- Fig. 1 is a transverse section of a furnace constructed in accordance with my invention, with parts indicated diagrammatically and Fig. 2 is a partial cross section of a furnace with a modified baffle or screen.
- Fig. 3 is a vertical longitudinal sectional view of the form of the furnace shown in Fig. 1, with parts broken away and in which the conveyor is diagrammatically shown.
- the improved furnace comprises an elongated chamber a with a series of valve controlled gas burners. b and a series of valve controlled outlets or flues 0 arranged at spaced intervals along its length. Between the burners b and outlets 0 there is arranged a horizontally extending baffle or screen d composed of sheets of tire clay or refractory material carried on cross bearers (not shown) which operates to reflect the heat downwards on to the material being treated.
- the products of combustion from the burners. pass vertically through small slots, spaces or openings between the sheets in the baffle or around the sides of the baffle to the crown of the furnace chamber with which the outlets communicate.
- An endless conveyor 7 of chain or other suitable type has one run extending horizontally through this heated space between.
- the burners b and the baflle d carries the material to be dried and baked, slowly through the length of the furnace.
- the briquetted material may conveniently be laid upon trays and loaded on to the conveyor at one end of the furnace and discharged froin the remote end of the furnace after being baked.
- the burners and outlets are so regulated as to obtain an actual furnace temperature of about 700 F. at the charging end where the cold and moist material enters, the temperature falling progressively throughout the length of the furnace to an actual 500 F. at the outlet end, although the pyrometers will register about 650 F. throughout the whole length of the furnace.
- the pyrometers arranged at intervals along the heating Zone of the furnace enable the operator to observe the temperatures and to estimate such adjust-- ments of the burners and flues as may be desirable.
- the furnace is 99 feet in overall length and measures 98 feet between the inner faces of the end doors.
- the gas burners comprise concentrically arranged inner and outer slot-ted tubes for gas and air respectively, extending transversely of the furnace. These burners are twenty-five in number and are spaced at the following centres, measurements commencing and ending with reference to the outer faces of the furnace :1 6, 2, 2', 2, 2, a, L, 4, 4, a, 4., 4., 4', 4., 4', 4', a, a, 4, a, a, 4 6, 6, 6, 1 6.
- the dimensions of the main chamber give a volume of 1,550 cu. ft. below the trays, 730 cu. ft. above the trays making a total of 2,280 cu. ft.
- the volume of the chamber above thebaflle is 690 cu. ft. leading from main chamber into expansion chamber have an area of 1,780 sq. ins.
- the total available flue area to atmosphere is The slots 420 sq. ins. of which about 50 per cent is in use.
- a certain undeterminate volume of products of combustion leave the main chamher at either end through the space occupied by the trays.
- An improved furnace for drying fuel comprising an elongated chamber, a plural ity of individually adjustable gas burners spaced along the length of the chamber, a
- An improved furnace for drying fuel comprising an elongated chamber, a plurality of individually adjustable gas burners spaced along the length of the chamber, a plurality of individually adjustable burnt gas outlets'spaced along the length of the chamber, means for conveying continuously the material to be dried through the length of the chamber between the burners and the outlets, and a baffle having a plurality of openings distributed throughout its length for thepassage of the burnt gases, said baflle being adapted to reflect the heat downwardly so that the material under treatment is subjected to equal or substantially equal temperatures from above and below.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Tunnel Furnaces (AREA)
Description
4 May 22, 1928. 1,670,606
E. W. BOWEN FURNACE MORE PARTICULARLY FOR DRYING FUEL Filed p 1927 2 Sheets-Sheet 1 May 22, 1928.
- E. W. BOWEN FURNACE MORE PARTICULARLY FOR DRYING FUEL 2 Sheets-Sheet 2 Filed Sept. .26, 1927 N .0 .1 T a .d N
Patented May 22, 1 .928.
stars rarest FURNACE MORE PARTICULARLY FOR DRYING FUEL.
Application filed September 26, 1927, Serial No. 222,058, and in Great Britain September 9, 1926.
.ihis invention has reference to furnaces for drying and making materials at definitely regulated ten'iperatures and its primary object is to provide a continuously operating furnace which shall be especially suited to the drying and baking of briquettes, ovoids and the like of fuel compounded from materials such as anthracite duff and other carbonaceous materials mixed with a suitable wet binder. In the production of this fuel it is important that the temperature at which the drying and baking is effected should be carefully controlled as excessive heat might engender carbonizing ofthe material with detrimental results.
lVith the above and other objects in view, the invention comprises an elongated furnace chamber heated by a plurality of individually controlled gas burners, continuously operating means for conveying the material to bebaked through the length of the chamber, anda plurality of individually adjustable outlets or fiuesspaced along the length of the furnace, these latter and the burners enabling the temperatures encountered by the material under treatment to be regulated as required. A bafi'le or screen is located between the burners and the out lets and the material being treated is carried by a conveyor along a path just below said baffle. Pyrometers may be provided at various points in the furnace chamber to guide the operator in the adjustments required to control the temperature.
The invention is hereinafter more fully described with reference to the accompanying drawing in which Fig. 1 is a transverse section of a furnace constructed in accordance with my invention, with parts indicated diagrammatically and Fig. 2 is a partial cross section of a furnace with a modified baffle or screen.
Fig. 3 is a vertical longitudinal sectional view of the form of the furnace shown in Fig. 1, with parts broken away and in which the conveyor is diagrammatically shown.
In the form of construction illustrated in F ig.- 1 the improved furnace comprises an elongated chamber a with a series of valve controlled gas burners. b and a series of valve controlled outlets or flues 0 arranged at spaced intervals along its length. Between the burners b and outlets 0 there is arranged a horizontally extending baffle or screen d composed of sheets of tire clay or refractory material carried on cross bearers (not shown) which operates to reflect the heat downwards on to the material being treated. The products of combustion from the burners. pass vertically through small slots, spaces or openings between the sheets in the baffle or around the sides of the baffle to the crown of the furnace chamber with which the outlets communicate.
An endless conveyor 7 of chain or other suitable type has one run extending horizontally through this heated space between.
the burners b and the baflle d and this carries the material to be dried and baked, slowly through the length of the furnace. The briquetted material may conveniently be laid upon trays and loaded on to the conveyor at one end of the furnace and discharged froin the remote end of the furnace after being baked. 0
During the passage of the trays through the furnace the heat is reflected downwardly by the baflie orSscreend, so that the fuel under treatment is subjected to equal or substantially equal temperature from above and helow, als'o the "baffle protects the heating zone beneath it against sudden changes of temperature due to alteration of; draught or bars h of refractory material which may be chamfered at their lower edges to facilitate the entry of gases to the spaces therebetween.
With a certain fuel of the kind referred to it is necessary to perform the drying and baking operation at a temperature of about 650 F. and when dealing with this material in the improved furnace the burners and outlets are so regulated as to obtain an actual furnace temperature of about 700 F. at the charging end where the cold and moist material enters, the temperature falling progressively throughout the length of the furnace to an actual 500 F. at the outlet end, although the pyrometers will register about 650 F. throughout the whole length of the furnace. Thus as the material moves through the furnace and warms up, the temperature to which it is subjected gradually diminishes and all risk of overheating is thereby avoided. The pyrometers arranged at intervals along the heating Zone of the furnace enable the operator to observe the temperatures and to estimate such adjust-- ments of the burners and flues as may be desirable.
Though I have described my improved furnace as arranged and operated for the drying and baking of briquettes and ovoids of fuel, I would have it understood that it may also be applied to. other purposes where it is necessary to subject materials to heat at definite or carefully regulated temperatures.
In one constructional form according to the present invention which has proved very successful under test, the furnace is 99 feet in overall length and measures 98 feet between the inner faces of the end doors. The gas burners comprise concentrically arranged inner and outer slot-ted tubes for gas and air respectively, extending transversely of the furnace. These burners are twenty-five in number and are spaced at the following centres, measurements commencing and ending with reference to the outer faces of the furnace :1 6, 2, 2', 2, 2, a, L, 4, 4, a, 4., 4., 4', 4., 4', 4', a, a, 4, a, a, 4 6, 6, 6, 1 6.
The dimensions of the main chamber give a volume of 1,550 cu. ft. below the trays, 730 cu. ft. above the trays making a total of 2,280 cu. ft. The volume of the chamber above thebaflle is 690 cu. ft. leading from main chamber into expansion chamber have an area of 1,780 sq. ins. The total available flue area to atmosphere is The slots 420 sq. ins. of which about 50 per cent is in use. A certain undeterminate volume of products of combustion leave the main chamher at either end through the space occupied by the trays.
I claim 1. An improved furnace for drying fuel comprising an elongated chamber, a plural ity of individually adjustable gas burners spaced along the length of the chamber, a
plurality of individually adjustable burnt as outlets spaced along the length of the chamber, means for conveying continuously the material to be dried through the length of the chamber between the burners and outlets and a baffle composed of spaced sheets of refractory material located between the conveying means and the gas outlets.
2. An improved furnace for drying fuel comprising an elongated chamber, a plurality of individually adjustable gas burners spaced along the length of the chamber, a plurality of individually adjustable burnt gas outlets'spaced along the length of the chamber, means for conveying continuously the material to be dried through the length of the chamber between the burners and the outlets, and a baffle having a plurality of openings distributed throughout its length for thepassage of the burnt gases, said baflle being adapted to reflect the heat downwardly so that the material under treatment is subjected to equal or substantially equal temperatures from above and below.
In testimony whereof he has afliXed his signature.
ERNEST WINDSOR BOWEN.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1670606X | 1926-09-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
US1670606A true US1670606A (en) | 1928-05-22 |
Family
ID=10888053
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US222058A Expired - Lifetime US1670606A (en) | 1926-09-09 | 1927-09-26 | Furnace more particularly for drying fuel |
Country Status (1)
Country | Link |
---|---|
US (1) | US1670606A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2874949A (en) * | 1953-11-20 | 1959-02-24 | Clyde W Morrison | Brazing furnace construction |
-
1927
- 1927-09-26 US US222058A patent/US1670606A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2874949A (en) * | 1953-11-20 | 1959-02-24 | Clyde W Morrison | Brazing furnace construction |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US1701223A (en) | Furnace and method of treating bodies therein | |
US2380930A (en) | Carbonization | |
US1670606A (en) | Furnace more particularly for drying fuel | |
US1867318A (en) | Tunnel kiln | |
US2062642A (en) | Furnace for enameling, heat treating, etc., and process of applying heat therefor | |
US1916363A (en) | Tunnel kiln | |
US1871863A (en) | Furnace | |
US1925711A (en) | Recuperator | |
US1859507A (en) | Twin tunnel kiln | |
US1882107A (en) | Baker's oven | |
DE466298C (en) | Method of burning cement with granulation of the raw material before burning | |
US3360251A (en) | Revolving flame roasting furnace | |
US1552834A (en) | Heating furnace | |
SU25478A1 (en) | Muffle furnace | |
SU50076A1 (en) | Kiln for burning or drying materials or products with moderate heat | |
US1615593A (en) | Wire-heating oven | |
US1594315A (en) | Kiln | |
US1901970A (en) | Fluid heating apparatus | |
US1937395A (en) | Recirculating furnace | |
US1486369A (en) | Continuous heating furnace | |
US2114018A (en) | Apparatus for heating | |
DE460846C (en) | Shaft furnace for burning cement or lime | |
DE709651C (en) | High temperature tunnel furnace for firing ceramic goods | |
US1447588A (en) | Pair-heating furnace | |
US1539653A (en) | Annular muffle furnace or oven |