CA2187595C - Roll design - Google Patents
Roll design Download PDFInfo
- Publication number
- CA2187595C CA2187595C CA002187595A CA2187595A CA2187595C CA 2187595 C CA2187595 C CA 2187595C CA 002187595 A CA002187595 A CA 002187595A CA 2187595 A CA2187595 A CA 2187595A CA 2187595 C CA2187595 C CA 2187595C
- Authority
- CA
- Canada
- Prior art keywords
- drum
- press
- roll
- input end
- output end
- 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 - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
- F26B13/24—Arrangements of devices using drying processes not involving heating
- F26B13/28—Arrangements of devices using drying processes not involving heating for applying pressure; for brushing; for wiping
-
- 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
- B30B9/202—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 with co-operating cones
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Press Drives And Press Lines (AREA)
- Paper (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to a drum press, in which the gap between the drum (1) andthe roll (2) is greater at the input end than at the output end. The gap may decrease continuously or stepwise. Most preferably the drum is cylindrical in shape and the front end of the roll is thinner than the rear end. The chief advantage of the device is that feeding is easier to arrange with more space at the input end. The device is applicable for instance in the pressing of bark, sludge or chemical pulp.
Description
ROLL DESIGN
Technical Background The invention relates to a drum press which is usable for instance for pressing moist bark to make it suitable as a fuel.
The drum press has a rotating drum and inside this a prallel eccentrically positioned press roll. As the drum rotates, the material to be handled is pressed between the roll and the drum.
The material is usually fed at one end of the drum and removed at the opposite end. The drum is usually perforated, so that liquid may be discr.arged from the material to be pressed through the drum mantle. for transferring the material, the drum or the roll is usually inclined, or optionally deflectors inclined in the material flow direction are provided inside the drum.
For example FI pate:nt specification 69207 discloses a drum press operating according to the "multiple press method", in which material circulates several times about the drum. The drum in such a drum press usually has at least a length equal to its diameter, or even longer. The roll diameter being great relative to the drum diameter, there will be relatively little space between the drum and the roll, and the feeding of especially great material flows between the drum and the roll will be awkward.
Description of the Invention The chief purpose of the invention is to provide a drum press in which the feeding c:an be arranged better than in known solutions.
This purpose can be achieved by making the space between the drum and the roll, i.e. the difference between the cross areas of the drum and the roll, greater at the input end than at the w ,; '66600-251 output end. The space may be continuously (e. g. linearly) or stepwise decreasing. Most appropriately the drum is cylindrical in shape and the front end of the roll is narrower than the rear end.
According to the present invention there is provided a drum press comprising a drum with an input end and an output end, and a press roll disposed inside the drum, at least one of said drum and said press roll having an axis and being rotatable thereabout, said drum and said press roll defining a passage therebetween for receiving material to be pressed, said passage extending continuously from said input end to said output end wherein the space between the drum and the press roll is greater at the input end than at the output end.
The main advantage of the invention is that the feeding can be effectively carried out with great material flows. Nevertheless, the material can be compressed into as thin a mat as possible at the rear end of the drum, allowing maximum dry-matter content to be achieved. Yet nor the size nor the weight of the device need to be increased to achieve these advantages.
The press in accordance with the invention can primarily be used for dehydrating material containing water.
Pressing of bark, purification plant sludge, chemical pulp or peat are typical objects of application.
A number of preferred embodiments of the invention will be described in greater detail below with reference to the accompanying drawings. In these, figure 1 shows a lateral view of the drum press and figure 2 a lateral view of a second drum press.
2a The main components of the press are a rotating drum 1 and a press roll 2 rotating inside this. The drum is perforated with holes, through which liquid is removed from the material 3 to be squeezed. The roll can also be made hollow and perforated, and then liquid is discharged also through the roll. Material is introduced at the front end 4 of the drum. It circulates several times in the drum while being compressed, and leaves the drum at rear end 5. The drum can be used for instance for dehydrating moist bark.
The shaft or roll is mounted on bearings such that the front end 7 and the rear end 8 of the roll can be lifted and lowered independently of each other. Most preferably the ends are mounted floatingly on bearings, for instance by means of a hydraulic cylinder, so that the roll presses the material under constant pressure regardless of the thickness of the material layer. The roll 2 may be positioned eccentrically within the drum, as shown in the figures.
The drum press can be devised such that either the roll alone, or both the roll and the drum, or the drum alone, are rotated. Power transmission can be accomplished as desired. Techniques implemented in drum presses have been described e.g. in patents FI 69207 and FI 90442.
Front end 7 of roll 2 has a diameter smaller than the diameter of rear end 8 of the roll.
Roll 2 may initially be adjusted by means of a stopper for instance in a position such that it does not touch drum 1. As material 3 is first fed at the front end 4 of the drum, it will lift the front end 7 of the roll as it gets between the drum and the roll.
As the material proceeds, it will also lift the rear end 8 of the roll.
Between the drum and the roll, the material flow will form a wedge-shaped mat of material 9, which is removed at the rear end of the drum. The material progress can be acted on by means of the angle of inclination of the drum or with deflectors.
At the front end 4 of drum 1 there is plenty of space above the roll 2, which facilitates the feeding arrangement. Moreover, the feeding procedure will be reliable, given that even bulkier pieces of material will pass through the large input opening.
At the front end 4 of drum 1 there is plenty of space also below the roll, so that mat 9 may have a relatively thick front end relative to its rear end. This allows even a great material flow to be compressed to a high dry-matter content. Despite this, the angle of inclination of the roll remains very close to its initial position, which facilitates pivoting arrangements. Nevertheless; the roll has relatively-large play.
The supplementary space at the front end 4 of drum 1 also reduces wear;
because a thick mat of e.g. sandy bark will not be in violent contact with the components above the roll. Wear of the feed device is also reduced, because the material does not have to be introduced in the drum with great force.
In the drum press illustrated in figure 2, roll 2' has a constant diameter at front end T, then the diameter grows stepwise at 10 and becomes constant again at rear end 8'.
Thus, the thickness of material mat 9' also changes stepwise. When needed, the number of steps may be greater. A stepwise varying gap between the drum and the roll is adequate in implementations where pressing is to be accomplished in different steps under distinctly different pressures. An example of such an implementation is pulp washing. A specific pulp washing process is described e.g.
in FI patent specification 90442 (corresponding to PCT patent application FI93/00452).
The invention can also be accomplished for instance such that the drum diameter is greater at the front end than at the rear end.
Technical Background The invention relates to a drum press which is usable for instance for pressing moist bark to make it suitable as a fuel.
The drum press has a rotating drum and inside this a prallel eccentrically positioned press roll. As the drum rotates, the material to be handled is pressed between the roll and the drum.
The material is usually fed at one end of the drum and removed at the opposite end. The drum is usually perforated, so that liquid may be discr.arged from the material to be pressed through the drum mantle. for transferring the material, the drum or the roll is usually inclined, or optionally deflectors inclined in the material flow direction are provided inside the drum.
For example FI pate:nt specification 69207 discloses a drum press operating according to the "multiple press method", in which material circulates several times about the drum. The drum in such a drum press usually has at least a length equal to its diameter, or even longer. The roll diameter being great relative to the drum diameter, there will be relatively little space between the drum and the roll, and the feeding of especially great material flows between the drum and the roll will be awkward.
Description of the Invention The chief purpose of the invention is to provide a drum press in which the feeding c:an be arranged better than in known solutions.
This purpose can be achieved by making the space between the drum and the roll, i.e. the difference between the cross areas of the drum and the roll, greater at the input end than at the w ,; '66600-251 output end. The space may be continuously (e. g. linearly) or stepwise decreasing. Most appropriately the drum is cylindrical in shape and the front end of the roll is narrower than the rear end.
According to the present invention there is provided a drum press comprising a drum with an input end and an output end, and a press roll disposed inside the drum, at least one of said drum and said press roll having an axis and being rotatable thereabout, said drum and said press roll defining a passage therebetween for receiving material to be pressed, said passage extending continuously from said input end to said output end wherein the space between the drum and the press roll is greater at the input end than at the output end.
The main advantage of the invention is that the feeding can be effectively carried out with great material flows. Nevertheless, the material can be compressed into as thin a mat as possible at the rear end of the drum, allowing maximum dry-matter content to be achieved. Yet nor the size nor the weight of the device need to be increased to achieve these advantages.
The press in accordance with the invention can primarily be used for dehydrating material containing water.
Pressing of bark, purification plant sludge, chemical pulp or peat are typical objects of application.
A number of preferred embodiments of the invention will be described in greater detail below with reference to the accompanying drawings. In these, figure 1 shows a lateral view of the drum press and figure 2 a lateral view of a second drum press.
2a The main components of the press are a rotating drum 1 and a press roll 2 rotating inside this. The drum is perforated with holes, through which liquid is removed from the material 3 to be squeezed. The roll can also be made hollow and perforated, and then liquid is discharged also through the roll. Material is introduced at the front end 4 of the drum. It circulates several times in the drum while being compressed, and leaves the drum at rear end 5. The drum can be used for instance for dehydrating moist bark.
The shaft or roll is mounted on bearings such that the front end 7 and the rear end 8 of the roll can be lifted and lowered independently of each other. Most preferably the ends are mounted floatingly on bearings, for instance by means of a hydraulic cylinder, so that the roll presses the material under constant pressure regardless of the thickness of the material layer. The roll 2 may be positioned eccentrically within the drum, as shown in the figures.
The drum press can be devised such that either the roll alone, or both the roll and the drum, or the drum alone, are rotated. Power transmission can be accomplished as desired. Techniques implemented in drum presses have been described e.g. in patents FI 69207 and FI 90442.
Front end 7 of roll 2 has a diameter smaller than the diameter of rear end 8 of the roll.
Roll 2 may initially be adjusted by means of a stopper for instance in a position such that it does not touch drum 1. As material 3 is first fed at the front end 4 of the drum, it will lift the front end 7 of the roll as it gets between the drum and the roll.
As the material proceeds, it will also lift the rear end 8 of the roll.
Between the drum and the roll, the material flow will form a wedge-shaped mat of material 9, which is removed at the rear end of the drum. The material progress can be acted on by means of the angle of inclination of the drum or with deflectors.
At the front end 4 of drum 1 there is plenty of space above the roll 2, which facilitates the feeding arrangement. Moreover, the feeding procedure will be reliable, given that even bulkier pieces of material will pass through the large input opening.
At the front end 4 of drum 1 there is plenty of space also below the roll, so that mat 9 may have a relatively thick front end relative to its rear end. This allows even a great material flow to be compressed to a high dry-matter content. Despite this, the angle of inclination of the roll remains very close to its initial position, which facilitates pivoting arrangements. Nevertheless; the roll has relatively-large play.
The supplementary space at the front end 4 of drum 1 also reduces wear;
because a thick mat of e.g. sandy bark will not be in violent contact with the components above the roll. Wear of the feed device is also reduced, because the material does not have to be introduced in the drum with great force.
In the drum press illustrated in figure 2, roll 2' has a constant diameter at front end T, then the diameter grows stepwise at 10 and becomes constant again at rear end 8'.
Thus, the thickness of material mat 9' also changes stepwise. When needed, the number of steps may be greater. A stepwise varying gap between the drum and the roll is adequate in implementations where pressing is to be accomplished in different steps under distinctly different pressures. An example of such an implementation is pulp washing. A specific pulp washing process is described e.g.
in FI patent specification 90442 (corresponding to PCT patent application FI93/00452).
The invention can also be accomplished for instance such that the drum diameter is greater at the front end than at the rear end.
Claims (10)
1. A drum press comprising a drum with an input end and an output end, and a press roll disposed inside the drum, at least one of said drum and said press roll having an axis and being rotatable thereabout, said drum and said press roll defining a passage therebetween for receiving material to be pressed, said passage extending continuously from said input end to said output end wherein the space between the drum and the press roll is greater at the input end than at the output end.
2. A drum press as claimed in claim 1, in which the roll has a smaller diameter at the input end than at the output end.
3. A drum press as claimed in claim 1 or 2, in which the drum is cylindrical.
4. A drum press as claimed in any one of claims 1 to 3, in which the roll is conical.
5. A drum press as claimed in any one of claims 1 to 3, in which the diameter of the roll increases stepwise from the input end toward the output end.
6. A drum press as claimed in claim 1, in which the distance of the roll from the drum is adjustable.
7. A drum press as claimed in claim 6, in which the spacings between the drum and the press roll at said input end and at said output end are adjustable independently of each other.
8. A drum press as claimed in any one of claims 1 to 7, wherein one of said drum and said press roll is positioned eccentrically relative to the other of said drum and said press roll.
9. Use of a drum press as claimed in any one of claims 1 to 8 for the pressing of bark, sludge or chemical pulp.
10. A method of pressing material in a drum press as defined in any one of claims 1 to 8, comprising the step of circulating the material around said drum to press said material between said drum and said press roll several times.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI954892A FI106650B (en) | 1995-10-13 | 1995-10-13 | Crawler structure |
| FI954892 | 1995-10-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2187595A1 CA2187595A1 (en) | 1997-04-14 |
| CA2187595C true CA2187595C (en) | 2002-11-26 |
Family
ID=8544188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002187595A Expired - Fee Related CA2187595C (en) | 1995-10-13 | 1996-10-10 | Roll design |
Country Status (4)
| Country | Link |
|---|---|
| CA (1) | CA2187595C (en) |
| FI (1) | FI106650B (en) |
| RU (1) | RU2111860C1 (en) |
| SE (1) | SE512847C2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106042436A (en) * | 2016-07-19 | 2016-10-26 | 衢州市煜鑫农产品加工技术开发有限公司 | Vertical type rolling dehydration device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106003794B (en) * | 2016-07-19 | 2017-07-25 | 衢州市煜鑫农产品加工技术开发有限公司 | Biomass rolls dehydration device |
-
1995
- 1995-10-13 FI FI954892A patent/FI106650B/en not_active IP Right Cessation
-
1996
- 1996-09-13 SE SE9603329A patent/SE512847C2/en not_active IP Right Cessation
- 1996-10-10 CA CA002187595A patent/CA2187595C/en not_active Expired - Fee Related
- 1996-10-11 RU RU96120069A patent/RU2111860C1/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106042436A (en) * | 2016-07-19 | 2016-10-26 | 衢州市煜鑫农产品加工技术开发有限公司 | Vertical type rolling dehydration device |
| CN106042436B (en) * | 2016-07-19 | 2017-08-18 | 衢州市煜鑫农产品加工技术开发有限公司 | One kind is vertical to roll dehydration device |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2187595A1 (en) | 1997-04-14 |
| FI954892A (en) | 1997-04-14 |
| SE512847C2 (en) | 2000-05-22 |
| RU2111860C1 (en) | 1998-05-27 |
| SE9603329D0 (en) | 1996-09-13 |
| FI954892A0 (en) | 1995-10-13 |
| SE9603329L (en) | 1997-04-14 |
| FI106650B (en) | 2001-03-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20161011 |