CA1073273A - Chip-firing unit - Google Patents
Chip-firing unitInfo
- Publication number
- CA1073273A CA1073273A CA259,039A CA259039A CA1073273A CA 1073273 A CA1073273 A CA 1073273A CA 259039 A CA259039 A CA 259039A CA 1073273 A CA1073273 A CA 1073273A
- Authority
- CA
- Canada
- Prior art keywords
- fan
- chips
- pipe
- burner
- chip
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/10—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of field or garden waste or biomasses
- F23G7/105—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of field or garden waste or biomasses of wood waste
-
- 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
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Wood Science & Technology (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Air Supply (AREA)
- Solid-Fuel Combustion (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A burner unit for chips such as wood chips or sawdust, includes a container for the chips, through which a screw conveyor extends to the inlet of a motor-driven fan to which the screw conveyor is connected to be rotated therewith. Air is conducted through the interior of the screw conveyor to the fan inlet. A first throttle for controlling the supply of air into the screw conveyor and a second throttle for controlling the supply of chips to the fan inlet are commonly controlled by a regulating rod which extends through the screw conveyor. The outlet from the fan leads to a cyclone burner where the chips are burnt.
A burner unit for chips such as wood chips or sawdust, includes a container for the chips, through which a screw conveyor extends to the inlet of a motor-driven fan to which the screw conveyor is connected to be rotated therewith. Air is conducted through the interior of the screw conveyor to the fan inlet. A first throttle for controlling the supply of air into the screw conveyor and a second throttle for controlling the supply of chips to the fan inlet are commonly controlled by a regulating rod which extends through the screw conveyor. The outlet from the fan leads to a cyclone burner where the chips are burnt.
Description
3~'73 The present invention relates to a chip-firing unit.
According to this invention there is provided a chip-firing unit comprising a burner, a container for chips, a fan and a drive connected to the fan for transportation of chips from the fan to the burner~ and a conveyor for transportation of chips from the container to an inlet of said an, said conveyor comprising a pipe having external thread means, said pipe being rotatably arranged in said container and being directly coupled to the fan drive in such manner that chips are continuously fed to the fan inlet during rotation of the pipe, the pipe also serving as a conduit to supply air to the fan inlet, a first throttle for controlling the passage of air through an inlet to said pipe, a second throttle for controlling the supply of chips to the fan inlet, and a regulating rod coupled to the first and second throttles for simultaneously controlling said throttles.
A chip-firing unit according to an embodiment of the invention is schematically illustrated in the accompanying drawing, in which:
Fig. 1 is a side view of the entire unit, and Fig. 2 is a cross-section of the cyclone burner.
The chip-firing unit shown comprises a container 1, which is intended to be filled with sawdust or the like, as indicated at 2~ Adjacent the bottom of container 1 a ~0~32~ 1 discharge means for the chips is mounted, which in the embodiment shown consists of a rotatable pipe 3. The outer surface of the pipe is provided with a thread or the like 4, which may have been formed by winding a wire or strip with suitable pitch around the pipe 3, which thereby forms a screw conveyor. The pipe 3 is rotatably supported by the container 1 at its left-hand end in Fig. 1, and its right-hand end is rigidly fixed to and supported by a hub 11 via an end plate 6 having passages for air to pass therethrough. A sleeve 5 is joined at its outer end to a pin 9 which is supported in a bearing 10. The end plate 6 is made integral with the hub ll, which is part of a fan 12 driven by an electric motor 13 or the like disposed outside the container.
Through the pipe 3 extends a rod 14, which carries two throttles 15 and 16, respectively, in the form of annular slides fitting into the sleeve 5 and pipe 3, respectively.
The throttle 16 is rigidly fixed to the rod 14 via a spoke member 16a which passes through openings in the end plate 6. The rod 14 is connecte~ outside the bearing 10 to a lever 17 loaded by one weight, which ,. 1 .. :
`~':
~ '7;~
lever is connected through a cable 18 or the like to a usual regulator on the hot-water boiler or the like to be ~ired wlth chips from the container 1. The throttle 15 preferably is adjust-ably mounted on the rod 14 so as to be rnovable along the same in one or the other direction. The container 1 prererably is pro-vided about the fan hub 11 with an inward directed flange 19, which together with the sleeve 6 defines a suitably adjusted dis-charge slot for the chips 2.
The fan 12 is connected on the outlet side through a conduit 20 to a burner, preferably a cyclone burner 21, to the lower surface of which the conduit 20 is tan~entially connected. The cyclone burner, as shown in Fig. 2, is provided on one side with a stub 22, for inserting the burner into the fire-space of the hot-water boiler.
The cyclone burner may on its other side be provided with a second-dary air inlet 23. In addition to the stub 24 for connection of the conduit 20 to the cyclone burner 21, the burner comprises a rurther stub indicated at 25 in Fig. 2 and intended for igniting ...
the burner by means of a blow lamp or the like.
The chip-fiFing unit described operates as follows.
Upon starting the motor 13, the fan 12 rotates, and therewith rotates the pipe 33 whereby the thread 4 on the pipe advances , .
. .. .. . . : . ~ . . : , .. . . . ~. . , - - .. - . . . .
t~Z~l chips as a thin layer toward the annular slot 8 between the throttle 16 and the flange 19, so that through this slot chips are supplied to the fan inlet. The fan at the same time sucks in air through a recess 7 controlled by the throttle 15 and through the pipe 3, which air together with the chips in question is transported by the fan 12 through the conduit 20 to the inlet 24 of the cyclone burner 21.
The mixture of air and chips then passes through the helical passage 26 to the cyclone interior. After the chips have been ignited at the inner circumferential surface of the cyclone by means of the blow lamp or the like, the chips from the conduit 20 continue to be gasified and burn by themselves, and the flames emerge through the cyclone burner, as indicated in Fig. 2.
The firing of the boiler having ~een started in this way, a usual regulator provi~ed on the boiler and s~nsitive to the boiler water temperature can control the supply of chips and combustion air to the cyclone burner by means of the cable 18 - and lever 17. When, for example, a more gentle firing is required, the regulator through the cable 18 reverses the lever 17 into counterclockwise direction in Fig. 1 whereby the rod 14 is moved to the right in Fig. 1, so that the throttles 15 and 16 throttle the air ana chip supply to the fan and thereby reduce the heat supply to the boiler. When the boiler water temperature drops to a value too low, the cable 18 return~ the rod 14-so ~hàt more-air and fuel are supplied ~o the fan and therewith to the burner. The aforementioned adjust-'' ` ' ~' ' .
, .: - '' ' ., ,' ~ ' ' ' ", ~'J~'~'7~
a~ility of the throttle 15 renders lt possib]e to vary the proport-ion Or air and chips to the ran, and therewith to the cyclone burner, according to demand.
The invention, Or course, is not restricted to the embodiment de~
scribed above and shown in the drawing, but can be realized in many other ways within the scope Or the invention.
:
: :;
: :
:
. ~' ~ ~. . , ' ' ' ' ' " '
According to this invention there is provided a chip-firing unit comprising a burner, a container for chips, a fan and a drive connected to the fan for transportation of chips from the fan to the burner~ and a conveyor for transportation of chips from the container to an inlet of said an, said conveyor comprising a pipe having external thread means, said pipe being rotatably arranged in said container and being directly coupled to the fan drive in such manner that chips are continuously fed to the fan inlet during rotation of the pipe, the pipe also serving as a conduit to supply air to the fan inlet, a first throttle for controlling the passage of air through an inlet to said pipe, a second throttle for controlling the supply of chips to the fan inlet, and a regulating rod coupled to the first and second throttles for simultaneously controlling said throttles.
A chip-firing unit according to an embodiment of the invention is schematically illustrated in the accompanying drawing, in which:
Fig. 1 is a side view of the entire unit, and Fig. 2 is a cross-section of the cyclone burner.
The chip-firing unit shown comprises a container 1, which is intended to be filled with sawdust or the like, as indicated at 2~ Adjacent the bottom of container 1 a ~0~32~ 1 discharge means for the chips is mounted, which in the embodiment shown consists of a rotatable pipe 3. The outer surface of the pipe is provided with a thread or the like 4, which may have been formed by winding a wire or strip with suitable pitch around the pipe 3, which thereby forms a screw conveyor. The pipe 3 is rotatably supported by the container 1 at its left-hand end in Fig. 1, and its right-hand end is rigidly fixed to and supported by a hub 11 via an end plate 6 having passages for air to pass therethrough. A sleeve 5 is joined at its outer end to a pin 9 which is supported in a bearing 10. The end plate 6 is made integral with the hub ll, which is part of a fan 12 driven by an electric motor 13 or the like disposed outside the container.
Through the pipe 3 extends a rod 14, which carries two throttles 15 and 16, respectively, in the form of annular slides fitting into the sleeve 5 and pipe 3, respectively.
The throttle 16 is rigidly fixed to the rod 14 via a spoke member 16a which passes through openings in the end plate 6. The rod 14 is connecte~ outside the bearing 10 to a lever 17 loaded by one weight, which ,. 1 .. :
`~':
~ '7;~
lever is connected through a cable 18 or the like to a usual regulator on the hot-water boiler or the like to be ~ired wlth chips from the container 1. The throttle 15 preferably is adjust-ably mounted on the rod 14 so as to be rnovable along the same in one or the other direction. The container 1 prererably is pro-vided about the fan hub 11 with an inward directed flange 19, which together with the sleeve 6 defines a suitably adjusted dis-charge slot for the chips 2.
The fan 12 is connected on the outlet side through a conduit 20 to a burner, preferably a cyclone burner 21, to the lower surface of which the conduit 20 is tan~entially connected. The cyclone burner, as shown in Fig. 2, is provided on one side with a stub 22, for inserting the burner into the fire-space of the hot-water boiler.
The cyclone burner may on its other side be provided with a second-dary air inlet 23. In addition to the stub 24 for connection of the conduit 20 to the cyclone burner 21, the burner comprises a rurther stub indicated at 25 in Fig. 2 and intended for igniting ...
the burner by means of a blow lamp or the like.
The chip-fiFing unit described operates as follows.
Upon starting the motor 13, the fan 12 rotates, and therewith rotates the pipe 33 whereby the thread 4 on the pipe advances , .
. .. .. . . : . ~ . . : , .. . . . ~. . , - - .. - . . . .
t~Z~l chips as a thin layer toward the annular slot 8 between the throttle 16 and the flange 19, so that through this slot chips are supplied to the fan inlet. The fan at the same time sucks in air through a recess 7 controlled by the throttle 15 and through the pipe 3, which air together with the chips in question is transported by the fan 12 through the conduit 20 to the inlet 24 of the cyclone burner 21.
The mixture of air and chips then passes through the helical passage 26 to the cyclone interior. After the chips have been ignited at the inner circumferential surface of the cyclone by means of the blow lamp or the like, the chips from the conduit 20 continue to be gasified and burn by themselves, and the flames emerge through the cyclone burner, as indicated in Fig. 2.
The firing of the boiler having ~een started in this way, a usual regulator provi~ed on the boiler and s~nsitive to the boiler water temperature can control the supply of chips and combustion air to the cyclone burner by means of the cable 18 - and lever 17. When, for example, a more gentle firing is required, the regulator through the cable 18 reverses the lever 17 into counterclockwise direction in Fig. 1 whereby the rod 14 is moved to the right in Fig. 1, so that the throttles 15 and 16 throttle the air ana chip supply to the fan and thereby reduce the heat supply to the boiler. When the boiler water temperature drops to a value too low, the cable 18 return~ the rod 14-so ~hàt more-air and fuel are supplied ~o the fan and therewith to the burner. The aforementioned adjust-'' ` ' ~' ' .
, .: - '' ' ., ,' ~ ' ' ' ", ~'J~'~'7~
a~ility of the throttle 15 renders lt possib]e to vary the proport-ion Or air and chips to the ran, and therewith to the cyclone burner, according to demand.
The invention, Or course, is not restricted to the embodiment de~
scribed above and shown in the drawing, but can be realized in many other ways within the scope Or the invention.
:
: :;
: :
:
. ~' ~ ~. . , ' ' ' ' ' " '
Claims (5)
1. A chip firing unit comprising a burner, a container for chips, a fan and a drive connected to the fan for transpor-tation of chips from the fan to the burner, and a conveyor for transportation of chips from the container to an inlet of said fan, said conveyor comprising a pipe having external thread means, said pipe being rotatably arranged in said container and being directly coupled to the fan drive in such manner that chips are continuously fed to the fan inlet during rotation of the pipe, the pipe also serving as a conduit to supply air to the fan inlet, a first throttle for controlling the passage of air through an inlet to said pipe, a second throttle for controlling the supply of chips to the fan inlet, and a regulating rod coupled to the first and second throttles for simultaneously controlling said throttles.
2. A chip-firing unit as claimed in Claim 1, wherein said regulating rod extends through the interior of said pipe and is reciprocatable in the longitudinal direction of said pipe, and said throttles are carried by said regulating rod.
3. A chip-firing unit as claimed in Claim 2, wherein the first throttle is adjustable longitudinally of the regulating rod.
4. A chip-firing unit as claimed in Claim 1, 2 or 3 and including means coupled to the regulating rod for connection to means coupled to the burner for automatically adjusting the regulating rod.
5. A chip-firing unit as claimed in Claim 1, 2 or 3 wherein the burner comprises a cyclone burner.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7509105A SE399120B (en) | 1975-08-14 | 1975-08-14 | SPANELDNINGSAGGREGAT |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1073273A true CA1073273A (en) | 1980-03-11 |
Family
ID=20325293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA259,039A Expired CA1073273A (en) | 1975-08-14 | 1976-08-13 | Chip-firing unit |
Country Status (4)
| Country | Link |
|---|---|
| CA (1) | CA1073273A (en) |
| DE (1) | DE2636155A1 (en) |
| GB (1) | GB1538511A (en) |
| SE (1) | SE399120B (en) |
-
1975
- 1975-08-14 SE SE7509105A patent/SE399120B/en unknown
-
1976
- 1976-08-11 DE DE19762636155 patent/DE2636155A1/en not_active Withdrawn
- 1976-08-11 GB GB33441/76A patent/GB1538511A/en not_active Expired
- 1976-08-13 CA CA259,039A patent/CA1073273A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1538511A (en) | 1979-01-17 |
| SE7509105L (en) | 1977-02-15 |
| SE399120B (en) | 1978-01-30 |
| DE2636155A1 (en) | 1977-03-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |