CA2230115A1 - Apparatus for dewatering/pressing in combination with washing of paper pulp - Google Patents
Apparatus for dewatering/pressing in combination with washing of paper pulp Download PDFInfo
- Publication number
- CA2230115A1 CA2230115A1 CA002230115A CA2230115A CA2230115A1 CA 2230115 A1 CA2230115 A1 CA 2230115A1 CA 002230115 A CA002230115 A CA 002230115A CA 2230115 A CA2230115 A CA 2230115A CA 2230115 A1 CA2230115 A1 CA 2230115A1
- Authority
- CA
- Canada
- Prior art keywords
- zone
- screw
- section
- dewatering
- washing
- 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.)
- Abandoned
Links
- 238000005406 washing Methods 0.000 title claims abstract description 36
- 229920001131 Pulp (paper) Polymers 0.000 title claims description 4
- 238000003825 pressing Methods 0.000 title description 5
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000007865 diluting Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000000835 fiber Substances 0.000 abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000010006 flight Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 241001052209 Cylinder Species 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/18—De-watering; Elimination of cooking or pulp-treating liquors from the pulp
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/117—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for outward flow filtration
- B01D29/118—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for outward flow filtration open-ended
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
- B01D29/6469—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers
- B01D29/6476—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers with a rotary movement with respect to the filtering element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/76—Handling the filter cake in the filter for purposes other than for regenerating
- B01D29/78—Handling the filter cake in the filter for purposes other than for regenerating for washing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/76—Handling the filter cake in the filter for purposes other than for regenerating
- B01D29/80—Handling the filter cake in the filter for purposes other than for regenerating for drying
- B01D29/82—Handling the filter cake in the filter for purposes other than for regenerating for drying by compression
- B01D29/828—Handling the filter cake in the filter for purposes other than for regenerating for drying by compression using screws
-
- 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
- B30B9/12—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 pressing worms or screws co-operating with a permeable casing
- B30B9/121—Screw constructions
-
- 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
- B30B9/26—Permeable casings or strainers
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/02—Filtering elements having a conical form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/28—Position of the filtering element
- B01D2201/282—Filtering elements with a horizontal rotation or symmetry axis
Abstract
A feed and dewatering device for dewatering/squeezing/washing of fiber pulp etc. comprising one section (1) for inlet, one section (2) for dewatering/squeezing, one section (3) for adding and mixing of washing liquid, one section (4) for the final dewatering/squeezing and one section (5) for outlet of treated material. The dewatering in zone (2) exists between a converging screen basket and a diverging screw core and dewatering in zone (4) between a cylindrical screen basket and a diverging screw core.
Description
CA 0223011~ 1998-03-17 APPARATUS FOR DEWATERING/PRESSING IN COMBINATION WITH WASHING OF
PAPER PULP.
The present lnvention relates to an appararus for dewatering, pressing and washing treatment of material such as paper pulp etc.
Pulp factories uses washing of fiber pulp partly after the cooking pro-cess for washing out of cooking chemicals and dissolved organic substan-ces, partly between different stages in the bleach plant for washing out of reaction products and remaining chemicals. With the present-days in-creased claims for the environment and using of a closed process in the mill, the claims for an effective washing of the pulp in increased too.
Up to now different kinds of filters normally are used for washing of the fiber pulp. The washing process is here carried out partly through dilu-tion/compressing/dewatering of the fiber pulp, partly through displace-ment by adding of spray water to the pulp web. The disadvantage with these filters is that the incoming consistency must be low - about 1 percent -and the outgoing consistency limitid for about 12-15 percent. This means that large quantities of water is circulated in the washing system, and due to the low outgoing consistency the washing out of the chemical reac-ted products are limitid.
Furthermore filter washers needs a big vertical space and the energy con-sumption is high. Not least depending of a considerable pump energy is necessary.
Presses are also used present-day for washing of pulp, and these installa-tions has increased considerably tlle last years. These types of presses works either as pure dewatering machines or they are equipped with an ex-tra device for adding of washwater. The washing process is here consequen-tly carried out either merely by d:iluting/pressing or this in combination with displacement.
Presses works with incoming consistency for about 4 percent and outgoing consistency for about 30-35 percent. These figures means big advantages by using of presses in comparison wit~l filters.Less circulat1ng liquid qllan-tity, less diluting of the pulp, less volume for the machine, higher was-hing out effect of the fiber pulp etc.
Presses for washing of pulp are today normally roll presses. These machi-nes are expensive, they have high :Loading on their foundation, they are sensitive for variation in consistency and freeness of the incoming pulp and the incoming consistency is limitid to maximum 4 percent.
CA 0223011~ 1998-03-17 W 097/13026 PCT/SE96tO1226 Screw presses, as are used very much today for pure dewatering/squeezing of fiber pulp, are simple and cheap machines. The problem is that we to-day have not an effective screw press construction with separate washlng zone for adding of liquid for more effective washing process.
The object of the present invention is to produce a screw washing presswhere the advantages for the screw press construction itself is used and in comination with an effective washing zone. Incoming pulp suspension at consistency normally 4-10 percent is dewatered/squeezed in a first de-watering zone up to about 12-20 percent. After this washing llquid is ad-ded in a zone where the fiber pulp is allowed to expand. No dewateringexist in the washing zone but on the other hand an effective mixing to distribute the washing liquid in the fiber pulp.
After the washing zone the fiber pulp is once more comprimated between a straight screen cylinder and a divergent core of the screw. In the final part of the press exist dewatering out through the screen cylinder as well as inwards through a perforated core of the screw. Throttle devise is used at the outlet of the cylinder to regulate the final dryness of the press-ed pulp.
Fig. 1 lS a section through one embodiment of the invention.
The apparatus shown in fis. 1 includes an inlet section 1 for the pulp, a first dewatering zone 2, a washing section 3 for diluting/adding of wash-ing liquid, a final pressing zone 4 and an outlet zone 5 for the washed and comprimated pulp.
In the outer case 6, formed like a through, is section 1 separated fromsection 2 by means of a wall 7, section 2 from section 3 by means of a wall 8, section 3 from section 4 by means of a wall 18 and section ~ from section 5 by means of a wall 9.
A press screw with divergent core 10 hav a length through all the embodi-ment and shaft journals have conventional bearings 13 and 14 (not showed).
On the journal 12 is placed a gear motor for drive of the screw.
In zone 2 the converging screw flights 15 is surrounded by a screen cylin-der 16. In zone 3 are bars 17 welded on the screw core for an effective mixing of the fiber pulp with washing liquid 39 added through pipe 41 and screen holes 40. In zone 4 the cylindrical screw flights 19 are surronded by a screen basket 20. The rear part of screen basket 20, zone 37, is not perforated. In the forward part of the press screw 10 is also the core per-forated 22 for draining inwards of squeezed liquid.
CA 0223011~ 1998-03-17 At the pulp outlet 23 is connected a throttle devise 24 and this can be regulated in horizontal directior-. The compressed pulp fall down through the outlet chamber 25. The pulp ~s fed to the press through a pipe 26 and the squeeced liquid is drained out through pipes 27 and 28 and the squeezed liquid through holes 22 is drained out through the channel 29.
The apparatus operates in the following way.
The material to be dewatered and washed is fed from a pump or level box through a pipe 26 and further by the screw flight 15 in to the zone 2.
The pulp is here dewatered throuclh compression and self draining. The water is pressed through the holes 36 and further through pipe 27. Thr compres-sing ratio counted as a flight volume 30/flight volume 31 is in a magni-tude of 2,0:1 to 4,0:1, preferably 2,5:1 to 3,5:1. At the putlet 38 from zone 2 has the pulp a possibility to expand at the same time as washing liquid is added through pipe 41 and screen holes 40. The ratio of diame-ter 32/diameter 33 is in a magnitude of 1,1:2,5, preferably 1,5:2,0. Thebars 17 on the screw core 10 gives an effective mixing of the added liquid into the fiber pulp. In the zone 37 the screen basket 20 is not perforated.
In the zone 4 the fiber pulp i successively compressed between a screen basket 20 and a diverging screw core 10. The compression ratio counted as a flight volume 34/flight volume 35 is in a magnitude of 2,0:1 to 4,0:1 preferably 2,6:1 to 3,2:1.
In the final part of the zone 4 the screw core 10 change from a diverging to a cyndrical form. The cyndrical part is perforated 22 for transport in-wards of the squeezed liquid. At the pulp outlet 23 is applied a throttle devise 24 for a final regulating of the dryness of the pulp. Through ho-les 21 squeezed water is distributed through pipe 28 and through holes 22 squeezed water through channel 29. The washed and compressed pulp fall down through the outlet chamber 25.
Due to an initial dewatering in zone 2 from consistencies 2-10 percent up to 12-20 percent and then adding of washing liquid and effective mixing down to consistencies 6-12 percent and fianlly dewatering/squeezing up to 25-35 percentis received an effective washing treatment in only one mach-ine wich has in itself undoubted advantages in comparison with for example roll presses etc.
CA 0223011~ 1998-03-17 In the present invention is several possibilities to regulate the wash-ing effect through variation of the revolution for the screw lO, through variation of the quantity of added washing liquid 39 and variation of the power for the throttle devise 24.
For a further effective washing process this apparatus can be designed as a pressure vessel at wich the fiber pulp can be dewatered/washed at over-pressure and raised temperature. This means lower viscosity of the fluid and by that better washing out of the rest products in the pulp suspen-sion.
A variation of the apparatus of the present invention is showed in Fig.2.
Here is the screen cylinder prolonged for connection with the wall 8. The washing liquid 39 is added and distributed through pipe 18 and further through nipples 40.
PAPER PULP.
The present lnvention relates to an appararus for dewatering, pressing and washing treatment of material such as paper pulp etc.
Pulp factories uses washing of fiber pulp partly after the cooking pro-cess for washing out of cooking chemicals and dissolved organic substan-ces, partly between different stages in the bleach plant for washing out of reaction products and remaining chemicals. With the present-days in-creased claims for the environment and using of a closed process in the mill, the claims for an effective washing of the pulp in increased too.
Up to now different kinds of filters normally are used for washing of the fiber pulp. The washing process is here carried out partly through dilu-tion/compressing/dewatering of the fiber pulp, partly through displace-ment by adding of spray water to the pulp web. The disadvantage with these filters is that the incoming consistency must be low - about 1 percent -and the outgoing consistency limitid for about 12-15 percent. This means that large quantities of water is circulated in the washing system, and due to the low outgoing consistency the washing out of the chemical reac-ted products are limitid.
Furthermore filter washers needs a big vertical space and the energy con-sumption is high. Not least depending of a considerable pump energy is necessary.
Presses are also used present-day for washing of pulp, and these installa-tions has increased considerably tlle last years. These types of presses works either as pure dewatering machines or they are equipped with an ex-tra device for adding of washwater. The washing process is here consequen-tly carried out either merely by d:iluting/pressing or this in combination with displacement.
Presses works with incoming consistency for about 4 percent and outgoing consistency for about 30-35 percent. These figures means big advantages by using of presses in comparison wit~l filters.Less circulat1ng liquid qllan-tity, less diluting of the pulp, less volume for the machine, higher was-hing out effect of the fiber pulp etc.
Presses for washing of pulp are today normally roll presses. These machi-nes are expensive, they have high :Loading on their foundation, they are sensitive for variation in consistency and freeness of the incoming pulp and the incoming consistency is limitid to maximum 4 percent.
CA 0223011~ 1998-03-17 W 097/13026 PCT/SE96tO1226 Screw presses, as are used very much today for pure dewatering/squeezing of fiber pulp, are simple and cheap machines. The problem is that we to-day have not an effective screw press construction with separate washlng zone for adding of liquid for more effective washing process.
The object of the present invention is to produce a screw washing presswhere the advantages for the screw press construction itself is used and in comination with an effective washing zone. Incoming pulp suspension at consistency normally 4-10 percent is dewatered/squeezed in a first de-watering zone up to about 12-20 percent. After this washing llquid is ad-ded in a zone where the fiber pulp is allowed to expand. No dewateringexist in the washing zone but on the other hand an effective mixing to distribute the washing liquid in the fiber pulp.
After the washing zone the fiber pulp is once more comprimated between a straight screen cylinder and a divergent core of the screw. In the final part of the press exist dewatering out through the screen cylinder as well as inwards through a perforated core of the screw. Throttle devise is used at the outlet of the cylinder to regulate the final dryness of the press-ed pulp.
Fig. 1 lS a section through one embodiment of the invention.
The apparatus shown in fis. 1 includes an inlet section 1 for the pulp, a first dewatering zone 2, a washing section 3 for diluting/adding of wash-ing liquid, a final pressing zone 4 and an outlet zone 5 for the washed and comprimated pulp.
In the outer case 6, formed like a through, is section 1 separated fromsection 2 by means of a wall 7, section 2 from section 3 by means of a wall 8, section 3 from section 4 by means of a wall 18 and section ~ from section 5 by means of a wall 9.
A press screw with divergent core 10 hav a length through all the embodi-ment and shaft journals have conventional bearings 13 and 14 (not showed).
On the journal 12 is placed a gear motor for drive of the screw.
In zone 2 the converging screw flights 15 is surrounded by a screen cylin-der 16. In zone 3 are bars 17 welded on the screw core for an effective mixing of the fiber pulp with washing liquid 39 added through pipe 41 and screen holes 40. In zone 4 the cylindrical screw flights 19 are surronded by a screen basket 20. The rear part of screen basket 20, zone 37, is not perforated. In the forward part of the press screw 10 is also the core per-forated 22 for draining inwards of squeezed liquid.
CA 0223011~ 1998-03-17 At the pulp outlet 23 is connected a throttle devise 24 and this can be regulated in horizontal directior-. The compressed pulp fall down through the outlet chamber 25. The pulp ~s fed to the press through a pipe 26 and the squeeced liquid is drained out through pipes 27 and 28 and the squeezed liquid through holes 22 is drained out through the channel 29.
The apparatus operates in the following way.
The material to be dewatered and washed is fed from a pump or level box through a pipe 26 and further by the screw flight 15 in to the zone 2.
The pulp is here dewatered throuclh compression and self draining. The water is pressed through the holes 36 and further through pipe 27. Thr compres-sing ratio counted as a flight volume 30/flight volume 31 is in a magni-tude of 2,0:1 to 4,0:1, preferably 2,5:1 to 3,5:1. At the putlet 38 from zone 2 has the pulp a possibility to expand at the same time as washing liquid is added through pipe 41 and screen holes 40. The ratio of diame-ter 32/diameter 33 is in a magnitude of 1,1:2,5, preferably 1,5:2,0. Thebars 17 on the screw core 10 gives an effective mixing of the added liquid into the fiber pulp. In the zone 37 the screen basket 20 is not perforated.
In the zone 4 the fiber pulp i successively compressed between a screen basket 20 and a diverging screw core 10. The compression ratio counted as a flight volume 34/flight volume 35 is in a magnitude of 2,0:1 to 4,0:1 preferably 2,6:1 to 3,2:1.
In the final part of the zone 4 the screw core 10 change from a diverging to a cyndrical form. The cyndrical part is perforated 22 for transport in-wards of the squeezed liquid. At the pulp outlet 23 is applied a throttle devise 24 for a final regulating of the dryness of the pulp. Through ho-les 21 squeezed water is distributed through pipe 28 and through holes 22 squeezed water through channel 29. The washed and compressed pulp fall down through the outlet chamber 25.
Due to an initial dewatering in zone 2 from consistencies 2-10 percent up to 12-20 percent and then adding of washing liquid and effective mixing down to consistencies 6-12 percent and fianlly dewatering/squeezing up to 25-35 percentis received an effective washing treatment in only one mach-ine wich has in itself undoubted advantages in comparison with for example roll presses etc.
CA 0223011~ 1998-03-17 In the present invention is several possibilities to regulate the wash-ing effect through variation of the revolution for the screw lO, through variation of the quantity of added washing liquid 39 and variation of the power for the throttle devise 24.
For a further effective washing process this apparatus can be designed as a pressure vessel at wich the fiber pulp can be dewatered/washed at over-pressure and raised temperature. This means lower viscosity of the fluid and by that better washing out of the rest products in the pulp suspen-sion.
A variation of the apparatus of the present invention is showed in Fig.2.
Here is the screen cylinder prolonged for connection with the wall 8. The washing liquid 39 is added and distributed through pipe 18 and further through nipples 40.
Claims (6)
1. An apparatus for dewatering, squeezing and at the same time washing of material in form of paper pulp etc. including an inlet and an outlet for the material and a feeding device comprising a longitudinal feed screw with diverging screw core and the screw surrounding mantle which in a first section (2) is formed as a screen basket with in the feed direction coverging form, in a second section (3) is formed as a device for adding dilute liquid and a third section (4) formed as a cyndrical screen basket C H A R A C T E R I Z E D in that the proportion between diameter outlet converging screen basket (16) zone (2) and diameter cylindrical screen basket (20) zone (4) is of a magnitude of 1:1,1 to 1:2,5 and preferably 1:1,5 to 1:2,0.
2. Apparatus according to claim 1 C H A R A C T E R I Z E D in that within zone (3) and at the beginning zone (4) are on the feed screw (10) applied units (17) for agitating and mixing the material fed out from zone (2) with the diluting liquid added to zone (3).
3. Apparatus according to claim 1 C H A R A C T E R I Z E D in that the drive unit for the screw (10) has variable revolutions.
4. Apparatus according to any of the claims 1-3, C H A R A C T E R I Z E D
in that core of screw (10) is perforated at the outlet position (23) for draining also inwards of the squeezed liquid.
in that core of screw (10) is perforated at the outlet position (23) for draining also inwards of the squeezed liquid.
5. Apparatus according to any of the claims 1-4, C H A R A C T E R I Z E D
in that at the outlet(23) for the material are applied throttle device (24) for final regulating of the dryness of the treated material.
in that at the outlet(23) for the material are applied throttle device (24) for final regulating of the dryness of the treated material.
6. Apparatus according to any of the claims 1-5, C H A R A C T E R I Z E D
in that the apparatus is designed as a pressure vessel at which the material can be dewatered/washed at overpressure and by that raised temperature.
in that the apparatus is designed as a pressure vessel at which the material can be dewatered/washed at overpressure and by that raised temperature.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9503383A SE9503383L (en) | 1995-10-02 | 1995-10-02 | Screw press with separate washing zone for dewatering and washing of fiber suspensions |
| SE9503383-3 | 1995-10-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2230115A1 true CA2230115A1 (en) | 1997-04-10 |
Family
ID=20399645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002230115A Abandoned CA2230115A1 (en) | 1995-10-02 | 1996-10-01 | Apparatus for dewatering/pressing in combination with washing of paper pulp |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0853699A1 (en) |
| JP (1) | JP2001503479A (en) |
| CA (1) | CA2230115A1 (en) |
| SE (1) | SE9503383L (en) |
| WO (1) | WO1997013026A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6423183B1 (en) | 1997-12-24 | 2002-07-23 | Kimberly-Clark Worldwide, Inc. | Paper products and a method for applying a dye to cellulosic fibers |
| US6749721B2 (en) | 2000-12-22 | 2004-06-15 | Kimberly-Clark Worldwide, Inc. | Process for incorporating poorly substantive paper modifying agents into a paper sheet via wet end addition |
| US6582560B2 (en) | 2001-03-07 | 2003-06-24 | Kimberly-Clark Worldwide, Inc. | Method for using water insoluble chemical additives with pulp and products made by said method |
| US7749356B2 (en) | 2001-03-07 | 2010-07-06 | Kimberly-Clark Worldwide, Inc. | Method for using water insoluble chemical additives with pulp and products made by said method |
| AU2003214028A1 (en) * | 2003-03-14 | 2004-09-30 | Atlas-Stord Denmark A/S | A screw press having a cylindrical portion |
| SE525565C2 (en) * | 2003-07-01 | 2005-03-08 | Metso Paper Inc | Process and washing press for washing and dewatering a fiber suspension |
| US7670459B2 (en) | 2004-12-29 | 2010-03-02 | Kimberly-Clark Worldwide, Inc. | Soft and durable tissue products containing a softening agent |
| DE102007036377A1 (en) * | 2007-07-31 | 2009-02-05 | Voith Patent Gmbh | Use of washing and screw presses for raw material and pulp washing |
| GB2477805B (en) * | 2010-02-16 | 2016-10-12 | Hydro Int Plc | A separator and components thereof |
| CN202685345U (en) * | 2012-08-03 | 2013-01-23 | 江门市贝尔斯顿电器有限公司 | Squeezing mechanism for oil press |
| SE541532C2 (en) * | 2018-03-12 | 2019-10-29 | Valmet Oy | Arrangement and method for transporting pulp from one process stage to a subsequent process stage |
| CN110075592A (en) * | 2019-05-31 | 2019-08-02 | 威海沁和实业有限公司 | Spiral filtration rinsing maching |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE371656B (en) * | 1973-04-05 | 1974-11-25 | Wallen & Co Ab Lennart | |
| NO154383C (en) * | 1984-03-29 | 1986-09-10 | Thune Eureka As | SCREW PRESS. |
| US4915830A (en) * | 1988-08-19 | 1990-04-10 | Sprout-Bauer, Inc. | Pulp wash press |
-
1995
- 1995-10-02 SE SE9503383A patent/SE9503383L/en not_active IP Right Cessation
-
1996
- 1996-10-01 CA CA002230115A patent/CA2230115A1/en not_active Abandoned
- 1996-10-01 WO PCT/SE1996/001226 patent/WO1997013026A1/en not_active Application Discontinuation
- 1996-10-01 EP EP96932919A patent/EP0853699A1/en not_active Withdrawn
- 1996-10-01 JP JP51418897A patent/JP2001503479A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0853699A1 (en) | 1998-07-22 |
| WO1997013026A1 (en) | 1997-04-10 |
| SE504271C2 (en) | 1996-12-23 |
| JP2001503479A (en) | 2001-03-13 |
| SE9503383L (en) | 1996-12-23 |
| SE9503383D0 (en) | 1995-10-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |