CA2053452C - Continuously operating drum-type press drier - Google Patents
Continuously operating drum-type press drier Download PDFInfo
- Publication number
- CA2053452C CA2053452C CA002053452A CA2053452A CA2053452C CA 2053452 C CA2053452 C CA 2053452C CA 002053452 A CA002053452 A CA 002053452A CA 2053452 A CA2053452 A CA 2053452A CA 2053452 C CA2053452 C CA 2053452C
- Authority
- CA
- Canada
- Prior art keywords
- drum
- cylinder
- type press
- rear end
- press drier
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B9/00—Presses specially adapted for particular purposes
- B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
- B30B9/20—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using rotary pressing members, other than worms or screws, e.g. rollers, rings, discs
- B30B9/207—Roller-and-ring presses
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drying Of Solid Materials (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Treatment Of Fiber Materials (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Looms (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
Abstract
The object of the invention is to provide a continuously operating drum-type press drier, especially for bark desiccation. The drier comprises an inclined rotating drum (1) provided with perforations (2) and a cylinder (3) which is fitted therein and forms with the drum, in the lower part thereof, a clamp cheek. The bark mass fed into the drum, at the front end thereof, is subjected several times to compression while the drum is rotating, before being discharged through the rear end of the drum.
To enhance the dewatering, the cylinder (3), according to the invention, is also provided with perforations (4) at the front end thereof, while the rear end of the cylinder is unperforated. The perforation can comprise approximately a third of the length of the cylinder (3). Water guiding members (9, 10) are arranged at the rear end of the cylinder in order to guide the discharged water past the pressed bark mass which is discharging.
To enhance the dewatering, the cylinder (3), according to the invention, is also provided with perforations (4) at the front end thereof, while the rear end of the cylinder is unperforated. The perforation can comprise approximately a third of the length of the cylinder (3). Water guiding members (9, 10) are arranged at the rear end of the cylinder in order to guide the discharged water past the pressed bark mass which is discharging.
Description
Continuously operating drum-type press drier The object of the present invention is a continuously operating drum-type press drier, especially for the drying of bark, in which the material to be dried is desiccated between a rotating drum, provided with perforations, and cylinder which rotates therein and settles according to the thickness of the material to be pressed. The drum is mounted in a slightly inclined position and the feeding of the material is effected at the upper front end. Matter is subjected to compression several times while travelling from the front end of the drum to the rear end thereof.
At least two kinds of continuously operating drum-type press driers are already known. The first type, such as the presser according to Finnish patent application 812 805, published April 15, 1982, is one in which the presser drum does operate continuously, but the material to be pressed is fed into the whole length of the drum and is subjected to compression only once before each discharge from the drum. Another known type differs from the one mentioned in such a way that the material to be compressed is fed to the front end of the drum and is subjected to compression several times before arriving at the end of the presser drum, as disclosed in Finnish patent FI
62330 issued December 1, 1979.
Different ways of enhancing the operation of such presser driers are known. It is known to provide the cylinders with edges or grooves which are intended to provide either more effective conveying of the material or improved dewatering.
In drum-type driers in which the material is subjected to compression only once and where the drum is completely horizontal, it is also known to provide the cylinder with perforations throughout its length so that a part of the dewatering is effected through the cylinder. In such a press where the material to be pressed is discharged from the drum immediately after the pressing, for instance by a screw conveyor above the cylinder, the dewatering can be effected through both ends of the cylinder without it being subjected to contact with the dried bark through the holes of the cylinder.
The above construction can not, however be used in the solution according to said Finnish patent FI 62330 because while the roller is inclined, the water can get in contact with bark which has already been pressed once, while draining from the front end of the cylinder towards the rear end of the cylinder. Therefore it has not been possible to use perforated cylinders with this type of pressers.
The purpose of the present invention is to provide an improvement to the invention according to said Finnish patent FI 62330 or its amendment granted as Finnish patent 72340 issued May 27, 1987. Namely, it has been observed that especially in such drum-type press driers where the drum is in an inclined position and the material is consequently subjected to compression several times while travelling through the drum, an improved dewatering effect can be implemented by providing the cylinder with perforations in a certain way. More specifically, the drum-type press drier is characterized in that the cylinder is hollow and is perforated along part of its length, seen from the front end, to effect the dewatering also through the interior of the cylinder, as the cylinder is unperforated at the end portion thereof and is provided with water guiding members at the rear end thereof for discharging the water and for guiding it past the pressed material.
According to a preferred embodiment, the cylinder is perforated through a shorter part than a half of its length, for instance approximately through one third of its length.
However, the length of the perforated part depends on several factors, such as the angle of tilt of the drum. The holes are preferably conical in shape expanding inwards.
In the following the invention is explained in more detail b wa of exam le and b reference to the a a d Y Y p y pp n ed drawing which illustrates an application of 'the drum-type press drier according to the invention, as seen from the side and in cross-section.
The drier is comprised of drum 1 of solid metal which is provided with perforations 2 expanding outwards. Drum 1 is mounted in a slightly inclined position in such a way that the front end, on the right in the figure, is slightly higher.
Cylinder 3 is fitted inside the drum and it settles according to the thickness of the material to be pressed inside drum 1, generally in a sharply inclined position in such a way that the front end on the right is higher. Thus the compression gap is tapered towards the rear end.
Cylinder 3 is supported by shaft 5 with the aid of radial abutment rings 6 provided with through-openings 7.
The feed of the material, in this case wet bark, is effected at the front end of the drum, from above, with the aid of feed pipe 8. The cylinder is rotated by machinery not illustrated and the drum rotates with the cylinder because of the bark material located therebetween. The incoming bark is subjected to compression for the first time immediately at the feed end, between the drum and the cylinder. ~lhile rotating, the cylinder lifts the bark to the top from where the bark again falls between the drum and the cylinder, proceeding in an axial direction towards the lower end of the drum. This pressing pradecure is repeated, until the bark finally falls out of the drum through the lower end thereof. In respect to the operation of such a drum-type press drier, reference can be made here to said Finnish patent FI 62330.
The cylinder deviates from the said previous solution in that it is not closed, but has a hollow construction built according to the above method and dewatering holes 4 are arranged at the front end thereof, according to the invention. With the aid of these holes the water can not only be discharged through outer drum 1, but can also be discharged through the interior of the cylinder, as illustrated in the figure.
It is also essential, according to the invention, that the perforation of the cylinder is arranged on only part of the length of the cylinder, for instance a third of this length.
Thus the water can be discharged during the first compression both through the cylinder and the drum and then drain down the cylinder without mixing with the bark which has already been pressed once. The shape of holes 4 is preferably conical expanding inwards. This prevents the blocking of the holes.
The discharge of the water from the interior of cylinder 3 is so arranged that the water is allowed to pass the pressed mass of bark which is being discharged. Flanging 9 can be connected, for instance, to the rear end of the cylinder, in the way illustrated in the figure, the rear end of the flanging opens up in such a way that it is directed inclinedly downwards in the lower part of the cylinder.
Groove 10 is interlocked with this and its front end, as viewed in another direction, is curved following flanging 9.
It is, of course, also possible to arrange the dewatering via shaft 5.
At least two kinds of continuously operating drum-type press driers are already known. The first type, such as the presser according to Finnish patent application 812 805, published April 15, 1982, is one in which the presser drum does operate continuously, but the material to be pressed is fed into the whole length of the drum and is subjected to compression only once before each discharge from the drum. Another known type differs from the one mentioned in such a way that the material to be compressed is fed to the front end of the drum and is subjected to compression several times before arriving at the end of the presser drum, as disclosed in Finnish patent FI
62330 issued December 1, 1979.
Different ways of enhancing the operation of such presser driers are known. It is known to provide the cylinders with edges or grooves which are intended to provide either more effective conveying of the material or improved dewatering.
In drum-type driers in which the material is subjected to compression only once and where the drum is completely horizontal, it is also known to provide the cylinder with perforations throughout its length so that a part of the dewatering is effected through the cylinder. In such a press where the material to be pressed is discharged from the drum immediately after the pressing, for instance by a screw conveyor above the cylinder, the dewatering can be effected through both ends of the cylinder without it being subjected to contact with the dried bark through the holes of the cylinder.
The above construction can not, however be used in the solution according to said Finnish patent FI 62330 because while the roller is inclined, the water can get in contact with bark which has already been pressed once, while draining from the front end of the cylinder towards the rear end of the cylinder. Therefore it has not been possible to use perforated cylinders with this type of pressers.
The purpose of the present invention is to provide an improvement to the invention according to said Finnish patent FI 62330 or its amendment granted as Finnish patent 72340 issued May 27, 1987. Namely, it has been observed that especially in such drum-type press driers where the drum is in an inclined position and the material is consequently subjected to compression several times while travelling through the drum, an improved dewatering effect can be implemented by providing the cylinder with perforations in a certain way. More specifically, the drum-type press drier is characterized in that the cylinder is hollow and is perforated along part of its length, seen from the front end, to effect the dewatering also through the interior of the cylinder, as the cylinder is unperforated at the end portion thereof and is provided with water guiding members at the rear end thereof for discharging the water and for guiding it past the pressed material.
According to a preferred embodiment, the cylinder is perforated through a shorter part than a half of its length, for instance approximately through one third of its length.
However, the length of the perforated part depends on several factors, such as the angle of tilt of the drum. The holes are preferably conical in shape expanding inwards.
In the following the invention is explained in more detail b wa of exam le and b reference to the a a d Y Y p y pp n ed drawing which illustrates an application of 'the drum-type press drier according to the invention, as seen from the side and in cross-section.
The drier is comprised of drum 1 of solid metal which is provided with perforations 2 expanding outwards. Drum 1 is mounted in a slightly inclined position in such a way that the front end, on the right in the figure, is slightly higher.
Cylinder 3 is fitted inside the drum and it settles according to the thickness of the material to be pressed inside drum 1, generally in a sharply inclined position in such a way that the front end on the right is higher. Thus the compression gap is tapered towards the rear end.
Cylinder 3 is supported by shaft 5 with the aid of radial abutment rings 6 provided with through-openings 7.
The feed of the material, in this case wet bark, is effected at the front end of the drum, from above, with the aid of feed pipe 8. The cylinder is rotated by machinery not illustrated and the drum rotates with the cylinder because of the bark material located therebetween. The incoming bark is subjected to compression for the first time immediately at the feed end, between the drum and the cylinder. ~lhile rotating, the cylinder lifts the bark to the top from where the bark again falls between the drum and the cylinder, proceeding in an axial direction towards the lower end of the drum. This pressing pradecure is repeated, until the bark finally falls out of the drum through the lower end thereof. In respect to the operation of such a drum-type press drier, reference can be made here to said Finnish patent FI 62330.
The cylinder deviates from the said previous solution in that it is not closed, but has a hollow construction built according to the above method and dewatering holes 4 are arranged at the front end thereof, according to the invention. With the aid of these holes the water can not only be discharged through outer drum 1, but can also be discharged through the interior of the cylinder, as illustrated in the figure.
It is also essential, according to the invention, that the perforation of the cylinder is arranged on only part of the length of the cylinder, for instance a third of this length.
Thus the water can be discharged during the first compression both through the cylinder and the drum and then drain down the cylinder without mixing with the bark which has already been pressed once. The shape of holes 4 is preferably conical expanding inwards. This prevents the blocking of the holes.
The discharge of the water from the interior of cylinder 3 is so arranged that the water is allowed to pass the pressed mass of bark which is being discharged. Flanging 9 can be connected, for instance, to the rear end of the cylinder, in the way illustrated in the figure, the rear end of the flanging opens up in such a way that it is directed inclinedly downwards in the lower part of the cylinder.
Groove 10 is interlocked with this and its front end, as viewed in another direction, is curved following flanging 9.
It is, of course, also possible to arrange the dewatering via shaft 5.
Claims (5)
1. A constantly operating drum-type press drier, especially for bark dewatering, comprising a rotating drum provided with perforations and mounted in a slightly declined position, thus having an upper and a lower end, a hollow cylinder mounted rotatably within the drum and at least partly perforated, so as to effect dewatering also through the interior of the cylinder, said cylinder having a front end and a rear end disposed at said upper and lower end, respectively, inlet means for introducing material to be dewatered between said drum and said cylinder at said upper end of the drum, outlet means for discharging dried material at the lower end of the drum, water guiding means for guiding separated water past the dried material at the lower end of the cylinder, the cylinder being adapted to settle according to the thickness of the material to be pressed, and the material being subjected to compression several times while travelling through the drum, characterized in that the cylinder is perforated only at its upper end and is nonperforated at its lower end.
2. A drum-type press drier according to claim 1, characterized in that the cylinder is perforated along a shorter part than half of its length, e.g.
approximately a third of its length.
approximately a third of its length.
3. A drum-type press drier according to claim 1 or 2, characterized in that the perforations of the cylinder are conical and expand inwards.
4. A drum-type press drier according to any of the preceding claims, characterized in that the water guiding means comprises a flanging attached to the rear end of the cylinder which forms an extension of the drum and extends past the discharging point of the pressed material at the rear end of the drier.
5. A drum-type press drier according to claim 4, characterized in that the water guiding means additionally includes a flanging and a groove or a similar member which interlocks with the said flanging underneath thereof.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI905134 | 1990-10-18 | ||
| FI905134A FI88435C (en) | 1990-10-18 | 1990-10-18 | KONTINUERLIGT ARBETANDE TRUMPRESSTORK |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2053452A1 CA2053452A1 (en) | 1992-04-19 |
| CA2053452C true CA2053452C (en) | 2001-07-17 |
Family
ID=8531264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002053452A Expired - Lifetime CA2053452C (en) | 1990-10-18 | 1991-10-15 | Continuously operating drum-type press drier |
Country Status (5)
| Country | Link |
|---|---|
| CA (1) | CA2053452C (en) |
| FI (1) | FI88435C (en) |
| NO (1) | NO178511C (en) |
| RU (1) | RU2036402C1 (en) |
| SE (1) | SE506239C2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109959219A (en) * | 2019-04-10 | 2019-07-02 | 杭州小橙工业设计有限公司 | A kind of rubbish drying unit easy to use |
-
1990
- 1990-10-18 FI FI905134A patent/FI88435C/en active IP Right Grant
-
1991
- 1991-10-15 CA CA002053452A patent/CA2053452C/en not_active Expired - Lifetime
- 1991-10-17 SE SE9103025A patent/SE506239C2/en unknown
- 1991-10-17 RU SU915001937A patent/RU2036402C1/en active
- 1991-10-17 NO NO914087A patent/NO178511C/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109959219A (en) * | 2019-04-10 | 2019-07-02 | 杭州小橙工业设计有限公司 | A kind of rubbish drying unit easy to use |
Also Published As
| Publication number | Publication date |
|---|---|
| NO914087L (en) | 1992-04-21 |
| FI88435C (en) | 1993-05-10 |
| FI88435B (en) | 1993-01-29 |
| RU2036402C1 (en) | 1995-05-27 |
| SE9103025L (en) | 1992-04-19 |
| SE506239C2 (en) | 1997-11-24 |
| FI905134A0 (en) | 1990-10-18 |
| SE9103025D0 (en) | 1991-10-17 |
| CA2053452A1 (en) | 1992-04-19 |
| NO914087D0 (en) | 1991-10-17 |
| NO178511C (en) | 1996-04-10 |
| NO178511B (en) | 1996-01-02 |
| FI905134A (en) | 1992-04-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed | ||
| MKEC | Expiry (correction) |
Effective date: 20121202 |