CN103154360A - Process for the drying of pulp and a suction roll used for the drying of pulp - Google Patents
Process for the drying of pulp and a suction roll used for the drying of pulp Download PDFInfo
- Publication number
- CN103154360A CN103154360A CN2011800481896A CN201180048189A CN103154360A CN 103154360 A CN103154360 A CN 103154360A CN 2011800481896 A CN2011800481896 A CN 2011800481896A CN 201180048189 A CN201180048189 A CN 201180048189A CN 103154360 A CN103154360 A CN 103154360A
- Authority
- CN
- China
- Prior art keywords
- pulp
- suction roll
- roller
- open surface
- paper pulp
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000001035 drying Methods 0.000 title abstract description 7
- 229920001131 Pulp (paper) Polymers 0.000 claims description 36
- 229920003043 Cellulose fiber Polymers 0.000 claims description 5
- 239000000835 fiber Substances 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 26
- 239000011111 cardboard Substances 0.000 description 7
- 230000018044 dehydration Effects 0.000 description 7
- 238000006297 dehydration reaction Methods 0.000 description 7
- 230000002349 favourable effect Effects 0.000 description 7
- 239000011087 paperboard Substances 0.000 description 7
- 239000012634 fragment Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000007799 cork Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/10—Suction rolls, e.g. couch rolls
-
- 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
- F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
- F26B13/14—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning
- F26B13/16—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning perforated in combination with hot air blowing or suction devices, e.g. sieve drum dryers
-
- 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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/10—Suction rolls, e.g. couch rolls
- D21F3/105—Covers thereof
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G3/00—Doctors
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G3/00—Doctors
- D21G3/005—Doctor knifes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/20—Rollers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/12—Drying solid materials or objects by processes not involving the application of heat by suction
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Paper (AREA)
- Textile Engineering (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
The present invention relates to a process for the drying of pulp which process comprises the steps of, providing a pulp comprising cellulosic fibers, conducting the pulp to a wire, dewatering the pulp by the aid of a suction roll wherein the suction roll has a open surface area of above 60% and a shell thickness of above 50mm. By increasing the open surface area of the suction roll the dewatering of the pulp is increased. The invention further relates to suction roll for the drying of pulp.
Description
Technical field
The present invention relates to for the method for dry pulp and be used for the suction roll of dry pulp.
Background technology
The paper pulp that comprises cellulose fibre is used for the production of Paper or cardboard.Can be the much different mode of paper pulp is produced, and can use a lot of different cellulose fibres.
The paper pulp of producing is directed into woven wire, and to form fiber web, it finally forms Paper or cardboard.When paper pulp and Paper or cardboard are made in identical position, be easy to paper pulp is transported to the Paper or cardboard machine under wet condition.Therefore but the production of paper pulp and the production of Paper or cardboard also can be carried out in different positions, paper pulp need to be transported to Paper or cardboard production position.Thereby be desirably in carry before dry pulp, thereby avoid the conveying cost of the costliness that the unnecessary conveying due to water causes.
Main two kinds of dissimilar pulp dryers, i.e. fourdrinier wire and the cylinder mould machine of existing.Fourdrinier machine is the most frequently used, and paper pulp deposits to the continuous metal silk screen from head box.Water in paper pulp flows out by woven wire and forms pulp mat.After freely passing through the woven wire draining at first, when pulp mat was supported on woven wire, by applying the vacuum of increase, pulp mat was further dehydrated.Will pad remove from woven wire before, vacuum tank and/or couch roll by arranging apply vacuum to the below of pulp mat.Then pulp mat is directed to extruding section and dry section, in extruding section and dry section, water is further removed.
The dehydration of expectation maximization to paper pulp is to reduce the cost of transportation of paper pulp.Owing to removing water more expensive (because compare with utilizing free drainage or vacuum, this is the process of multi-energy more) in dry section, therefore, it is favourable can removing to the greatest extent water in the initial stage of the dehydration of paper pulp or drying process.
Can maximize in many ways dehydration.The performance of vacuum section, extruding section and dry section by optimizing pulp dryer can improve dehydration in to the greatest extent effective mode.The removal that keeps the paper pulp temperature can high improve to the greatest extent water is also favourable, because the viscosity of water reduces under higher temperature.And, preferably keep the pH value of paper pulp lower, preferred approximately 4-5 because fiber expands, thereby is beneficial to the discharge of water unlike under low pH value.
Another kind of feasible program is to add to paper pulp the chemical substance that improves draining.An example is described in WO0218704 to some extent.
But, still need to improve technique, be used for efficient mode dry pulp.
Summary of the invention
The purpose of this invention is to provide a kind of method, be used for mode dry pulp with improved and energy high efficiency.
Another object of the present invention is to provide a kind of suction roll for improvement of pulp dryer.
These purposes and other advantages realize by method according to claim 1.The present invention relates to the method for pulp dryer, described method comprises provides the paper pulp that comprises cellulose fibre, paper pulp is directed to woven wire, auxiliary step with dewatering of pulp by suction roll, wherein, suction roll has the open surface zone greater than 60%.By increasing the open surface zone of suction roll, the dehydration that improves paper pulp.
Suction roll has the thickness of shell greater than 50mm.Due to open surface zone increase, therefore preferably increase the thickness of shell of roller housing.In this mode, the intensity of roller is still fine, and still can have high negative pressure (vacuum) or suction force in roller.
Suction roll preferably includes scraper.Preferably, scraper is the air doctor.Scraper is used for the open surface zone of cleaning suction roll.
After the process suction roll, the dry matter content of paper pulp is preferably the 15-30% percentage by weight.Thereby, can improve by the suction roll that use has an open surface zone of increase the dry matter content of paper pulp.
The invention still further relates to the suction roll for dry pulp, wherein, suction roll has the open surface zone greater than 60%.By increasing the open surface zone of suction roll, the dehydration that can improve paper pulp.
The housing of suction roll has the thickness greater than 50mm.The thickness of shell that increases will improve the intensity of roller, and thereby can further increase the open surface zone of roller and/or the negative pressure of roller, the suction force that namely increases.
Suction roll preferably includes scraper.Preferably, scraper is the air doctor.With scraper, water is removed and removed from the open surface of roller is regional.
Description of drawings
The present invention is described below with reference to accompanying drawings, in accompanying drawing:
Fig. 1 has shown the schematic diagram of suction roll,
Fig. 2 has shown the schematic diagram on the open area surface of suction roll.
The specific embodiment
The present invention relates to for the method for dry pulp and be used for the suction roll of dry pulp.
Show, by increasing the open surface zone of roller, namely increase quantity and/or the size in hole of the housing of roller, the dehydration that can improve paper pulp in the unusual mode of energy high efficiency.The water yield of discharging from paper pulp can this mode increase, and does not increase needed energy simultaneously, namely by using the identical negative pressure of roller, i.e. and suction.The open surface zone of increase will allow higher negative pressure, thereby can increase negative pressure, and improve the water yield of removing from delignified pulp.
The amount in the open surface zone of suction roll housing is higher than 60% of the gross area of roller housing, preferably higher than 70%.The form in open surface zone is preferably the whole lip-deep some holes that are evenly distributed on the roller housing.Open surface zone in hull outside can be larger, and the open surface zone in enclosure interior can be less, and the hole that namely forms the open surface zone is the taper form.Preferably consist of total roller surf zone greater than 60% according to the open area dose,surface of suction roll of the present invention, see inboard or the outside of roller.
Form the size in hole in the open surface zone of roller housing by increase, speckle can occur on pulp mat.These suction roll vacuum speckles are favourable in pulp mat drying steps subsequently.Air dried use is the dry technology that the most often uses in pulp dryer, so and, having can large surface area be favourable to the greatest extent, the vacuum furnace speckle will increase the surface area of pulp mat, thereby improve dry.
Compare with the dryer roll that uses in prior art, the thickness of this roller housing is increased.Due to the increase in the open surface zone of roller, thereby the thickness that increases the roller housing can be necessary for roller provides sufficient intensity, or is favourable at least.Due to the thickness increase of roller housing, can also improve the negative pressure of suction roll.The thickness of roller housing is preferably greater than 50mm, even more preferably greater than 60mm.There is best ratio between the regional amount of the thickness of housing and open surface.If the amount in open surface zone is high, the thickness of roller housing increases, so that can be in the best way, namely with the most effective mode suction roll that turns round.
The negative pressure of roller inside (vacuum) is preferably 10-100kPa.
Suction roll preferably is provided with at least one scraper.The main application of scraper is from the open surface zone, namely removes water from the hole.Because the centrifugal force of roller is lower, the water of therefore discharging can not be removed from roller.Scraper thereby water is removed from the hole guarantees that the efficient of suction roll does not reduce.Scraper also can be removed impurity from suction roll, for example deposit.
Scraper is preferably the air doctor.The air doctor comprises air nozzle, and it is with the surface of forced air guiding at roller.The air doctor can comprise a more than air nozzle.Preferably, the whole width on the width covering shell surface of air doctor.The width of at least one nozzle is preferred enough widely can remove from the open surface zone of roller the air doctor of water to allow to form, and still enough narrowly again minimizes required air capacity.At least one air nozzle preferably is set to enough far away apart from the surface of roller housing, with the deposition of the water avoiding removing and/or nozzle from it deposit, but again enough closely with water and/or deposit from the regional removal of the open surface of roller.The air of air doctor should preferably be pressurized to the air doctor can remove water and/or sedimental some place.
By the method according to this invention, can improve the dry matter content at the paper pulp at the green end place of pulp dryer.Preferably, the dry matter content through the paper pulp after suction roll of the present invention is the 15-30% percentage by weight.By increasing the dry matter content of initial stage in pulp dryer place paper pulp, can use higher pressure at extruding section subsequently.
Can be any traditional type of producing for pulp dryer and/or Paper or cardboard according to suction roll of the present invention, difference be the increase of the amount in open surface zone.Miscellaneous part can be any traditional type such as the type of housing, vacuum system or water removal system etc.
Suction roll according to the present invention can be used in any traditional pulp dryer or technique.Preferably, use it to replace couch roll in fourdrinier machine.
It is also favourable using the combination of fragment roller and suction roll.The fragment roller preferably includes felt, i.e. felt formula fragment roller.The fragment roller preferably forms the section of nipping together with suction roll.The pressure of nipping between fragment roller and suction roll is preferably 25-40kN/m.It is favourable using the fragment roller, because it can tend to arrive due to the water of discharging the regional drying that improves paper pulp of open surface of suction roll to a greater degree.
Fig. 1 and Fig. 2 have shown according to suction roll 1 of the present invention.Woven wire 2 guiding pulp mat or nets.Woven wire 2 parts are reeled around suction roll 1.Suction roll 1 comprises roller housing 3, and roller housing 3 rotates around irrotational center roller core.Roller housing 3 comprises a plurality of holes that form the open surface zone.As seen from Figure 2, open area surperficial 9 is the form in hole, and described hole is by forming 3 borings of hole housing.At least 60% of the total surface of open surface zone 9 formation roller housings 3.The hole guarantees that the pulp mat on woven wire 2 is exposed to the low pressure (vacuum) in roller 1.Roller housing 3 is made of metal, and the thickness of roller housing 3 is greater than 50mm.
Paper pulp can be any traditional type.It can be mechanical pulp, chemimechanical pulp, chemical thermomechanical paper pulp and/or chemical pulp.The cellulose fibre of paper pulp can be the lignose of any traditional kind, for example hardwood fiber, cork fibrous or agricultural raw material or waste product.
According to the detailed description above of the present invention, other modification and variant will become apparent those skilled in the art.But, be apparent that, other such modification and variant be can realize and theory of the present invention and scope do not departed from.
Claims (7)
1. method that is used for dry pulp said method comprising the steps of:
The paper pulp that comprises cellulose fibre is provided;
Paper pulp is directed to woven wire;
Auxiliary with dewatering of pulp by suction roll, wherein, suction roll has the open surface zone greater than 60%, and greater than the thickness of shell of 50mm.
2. according to the described method of any one in aforementioned claim, wherein, described suction roll comprises scraper.
3. method according to claim 2, wherein, described scraper is the air doctor.
4. according to the described method of any one in aforementioned claim, wherein, after passing through suction roll, the dry matter content of paper pulp is the 15-30% percentage by weight.
5. suction roll that is used for dry pulp, wherein, this suction roll has the open surface zone greater than 60%, and greater than the thickness of shell of 50mm.
6. suction roll according to claim 5, wherein, suction roll comprises scraper.
7. suction roll according to claim 6, wherein, scraper is the air doctor.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1051037-8 | 2010-10-05 | ||
| SE1051037A SE535820C2 (en) | 2010-10-05 | 2010-10-05 | Process for drying pulp using a perforated suction roll |
| PCT/IB2011/054356 WO2012046184A1 (en) | 2010-10-05 | 2011-10-04 | Process for the drying of pulp and a suction roll used for the drying of pulp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103154360A true CN103154360A (en) | 2013-06-12 |
Family
ID=45927283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011800481896A Pending CN103154360A (en) | 2010-10-05 | 2011-10-04 | Process for the drying of pulp and a suction roll used for the drying of pulp |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP2625332A4 (en) |
| CN (1) | CN103154360A (en) |
| BR (1) | BR112013008132A2 (en) |
| NZ (1) | NZ608170A (en) |
| RU (1) | RU2582464C2 (en) |
| SE (1) | SE535820C2 (en) |
| WO (1) | WO2012046184A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112726262A (en) * | 2021-01-14 | 2021-04-30 | 广东理文造纸有限公司 | Papermaking dehydration device and dehydration method thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230294358A1 (en) * | 2020-02-12 | 2023-09-21 | Hewlett-Packard Development Company, L.P. | 3d printing with movable slurry dispenser |
| SE2230360A1 (en) * | 2022-11-11 | 2024-05-12 | Stora Enso Oyj | Method for manufacturing a film comprising highly refined cellulose fibers |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4146428A (en) * | 1976-10-13 | 1979-03-27 | Hermann Finckh Maschinenfabrik | Suction roll for paper machines |
| CN2052415U (en) * | 1988-07-18 | 1990-02-07 | 王锡元 | Cylinder machine paper-shaper with clip wire-cloth |
| CN1044506A (en) * | 1989-01-09 | 1990-08-08 | 维美德造纸机械有限公司 | The manufacture method of paper machine roller and cylinder and made roller and cylinder |
| CN1281519A (en) * | 1997-12-10 | 2001-01-24 | 韦尔梅特公司 | Roll for paper or board machine |
| CN1654741A (en) * | 2004-02-10 | 2005-08-17 | 美卓造纸机械公司 | Grooved forming roll |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB629633A (en) | 1947-03-27 | 1949-09-23 | Millspaugh Ltd | Suction rolls for paper-making machines |
| US3265559A (en) | 1965-05-03 | 1966-08-09 | Time Inc | Paper press section |
| CA924146A (en) * | 1970-08-20 | 1973-04-10 | Malashenko Alexander | Roll surface formulation |
| SU638658A1 (en) * | 1977-07-06 | 1978-12-25 | Центральный Научно-Исследовательский И Проектно-Конструкторский Институт По Проектированию Оборудования Для Целлюлозно-Бумажной Промышленности | Paper-making machine drying cylinder |
| FI106640B (en) * | 1997-12-15 | 2001-03-15 | Valmet Corp | Suction roll arrangement for the press in a cellulose dryer machine and the corresponding process |
| WO2002018704A1 (en) | 2000-08-31 | 2002-03-07 | Ondeo Nalco Company | Enhanced vacuum dewatering of pulp |
| FI20010721L (en) * | 2001-04-06 | 2002-10-07 | Metso Paper Inc | Press roller belt and press concept |
| DE102004029289A1 (en) * | 2004-06-17 | 2005-12-29 | Voith Paper Patent Gmbh | Machine using double belt former to make fibrous papermaking web from suspension, includes screen belts wrapping suction rollers and suction boxes |
-
2010
- 2010-10-05 SE SE1051037A patent/SE535820C2/en unknown
-
2011
- 2011-10-04 WO PCT/IB2011/054356 patent/WO2012046184A1/en active Application Filing
- 2011-10-04 BR BR112013008132A patent/BR112013008132A2/en not_active Application Discontinuation
- 2011-10-04 RU RU2013120321/12A patent/RU2582464C2/en active
- 2011-10-04 CN CN2011800481896A patent/CN103154360A/en active Pending
- 2011-10-04 EP EP11830274.4A patent/EP2625332A4/en not_active Withdrawn
- 2011-10-04 NZ NZ60817011A patent/NZ608170A/en not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4146428A (en) * | 1976-10-13 | 1979-03-27 | Hermann Finckh Maschinenfabrik | Suction roll for paper machines |
| CN2052415U (en) * | 1988-07-18 | 1990-02-07 | 王锡元 | Cylinder machine paper-shaper with clip wire-cloth |
| CN1044506A (en) * | 1989-01-09 | 1990-08-08 | 维美德造纸机械有限公司 | The manufacture method of paper machine roller and cylinder and made roller and cylinder |
| CN1281519A (en) * | 1997-12-10 | 2001-01-24 | 韦尔梅特公司 | Roll for paper or board machine |
| CN1654741A (en) * | 2004-02-10 | 2005-08-17 | 美卓造纸机械公司 | Grooved forming roll |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112726262A (en) * | 2021-01-14 | 2021-04-30 | 广东理文造纸有限公司 | Papermaking dehydration device and dehydration method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2625332A4 (en) | 2014-06-11 |
| BR112013008132A2 (en) | 2016-08-09 |
| RU2013120321A (en) | 2014-11-20 |
| SE535820C2 (en) | 2013-01-02 |
| RU2582464C2 (en) | 2016-04-27 |
| EP2625332A1 (en) | 2013-08-14 |
| SE1051037A1 (en) | 2012-04-06 |
| NZ608170A (en) | 2015-04-24 |
| WO2012046184A1 (en) | 2012-04-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130612 |