CN1823195A - Method for refining paper or cellulose fibers in an aqueous suspension - Google Patents
Method for refining paper or cellulose fibers in an aqueous suspension Download PDFInfo
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- CN1823195A CN1823195A CN 200480020024 CN200480020024A CN1823195A CN 1823195 A CN1823195 A CN 1823195A CN 200480020024 CN200480020024 CN 200480020024 CN 200480020024 A CN200480020024 A CN 200480020024A CN 1823195 A CN1823195 A CN 1823195A
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- milling
- tube
- fiber
- roller
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
- D21D1/34—Other mills or refiners
- D21D1/38—Other mills or refiners with horizontal shaft
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Abstract
The invention relates to a method for refining paper or cellulose fibres in an aqueous suspension. According to the invention, a refining region is formed between the inner wall of a rotating refining drum, e.g. a refining cylinder (1), and at least one rotating refining roller (2, 2') with a fixed rotational axis. As a result of the rotation of the refining cylinder (1), a liquid layer (8) forms on the inner wall thereof and thus penetrates between the refining roller (2, 2') and the refining cylinder (1) that are pressed against each other. A constant liquid flow containing the paper or cellulose fibres in an aqueous suspension is guided into and out of the liquid layer (8). In particular forms of embodiment, the axial transport over the entire length of the refining drum is assisted by fixed transport devices, e.g. transversal bars (14) comprising guide vanes.
Description
The present invention relates to a kind of by claim 1 method as described in the preamble.
Known for a long time paper pulp fiber must grind, and the paper made from them after making has the character of expectation, especially intensity, size and surface.These the method for grinding of frequent use utilize those to be provided with the grinding face of the bar of milling that is called blade.Corresponding machine is commonly referred to cutter formula jordan.Also use some method for grinding under special circumstances, wherein at least one grinding face does not have blade, so the merit of grinding (Mahlarbeit) is by frictional force or shear transfer.
The above-mentioned effect that grinds method can be milled parameter a roomy scope inner control by change, also is different aspect milling with wherein especially expecting strong cutting or strong fibrillation whether except reduction ratio.If paper pulp fiber is by these known method for grinding processing, then along with the increase of reduction ratio, its dehydration resistance also increases.Tolerance commonly used about the dehydration resistance is the grindability of measuring by Xiao Baier-Rui Gelefa (Schopper-Riegler) (being called for short the SR grindability).
Grindability increases when forming the scraps of paper has adverse influence to paper machine, but is tolerated, because the pulp quality feature of having mentioned plays a part outstanding for its availability.The parameter of will milling in many cases is chosen as, and makes to raise the least possible in order to meet the requirements of the grindability that fiber quality occurs.But the feasibility of this influence is very limited.May be unfavorable for the dynamic economics of milling in addition.
DE 894499 discloses a kind of grinding equipment, and it has the cylinder of milling of a rotation, a plurality ofly mills roll-in within it on the wall, so that mill fibrous material.The roller of milling is provided with special circumferential slot, makes it to reach certain effect of milling of expectation.But this grinding equipment does not design at the continuous method of operation.
Therefore the objective of the invention is to create a kind of method of continuous operation, the intensity level that adopts this method paper pulp fiber or paper fiber can be milled and can be improved the paper made from them for making.The increase of the dehydration resistance of Chu Xianing should be at least less than known method for grinding in this case.In addition, should be suitable for using in the commercial scale when the paper production for implementing this method devices needed.
This purpose is by reaching in the feature described in the claim 1.
Most of known tubes of milling are not suitable for this purpose, because their effect is based on the thick thing of fragmentation.For example US 2719463 has introduced a kind of cylinder of milling, although it allegedly can use in paper industry, it is used for processing the thicker dead meal that forms simultaneously in this process.The purpose of this equipment is to pulverize the interference material and should be able to not change the fiber that is included in the dead meal.
Working method according to novel method for grinding of the present invention can be optimized fiber properties, and further develops desired intensity thus, meanwhile not can as method in increase grindability like that.
The comparative test of carrying out with long fibered pulp proves, in order to reach the length of tearing of 8km, needs shape SR grindability at 45 on a cutter formula fiberizer, only is 18 ° of SR grindabilities and adopt this new method.Needed unit grinds the merit minimizing and reaches 50%.
Can think, change the structure of fibre wall and the surface of fiber, make them have better flexibility and adhesion, must not have fibril thus and get loose from the outer surface of fiber by this new method for grinding.Paper scrap that is fiber chip breaking also produce seldom.
When method of the present invention was applied to grind the paper fiber of recyclable utilization, first and second then cited advantages can play particular importance.Because the paper fiber of recyclable utilization is through mill processes repeatedly at least once even often, so be willing to avoid any further pulverizing.
Describe the present invention and advantage thereof in detail by accompanying drawing below.In the accompanying drawing:
Fig. 1 represents by the example of cylinder enforcement by method of the present invention of milling;
Fig. 2 represents the details of the roller of milling shown in Figure 1;
Fig. 3 represents to be applicable to the side view of a grinding equipment implementing the inventive method, and wherein, the roller of milling is removed;
Fig. 4 represents to be used for a built-in fitting of axial conveying fiber material;
Fig. 5 represents to have the another kind of embodiment of different flow guide;
Details of milling roller shown in Fig. 6 presentation graphs 5;
Fig. 7 represents to have the another kind of embodiment of the short roller of milling;
Fig. 8 represent a kind of taper mill the tube form of implementation.
The grinding equipment that Fig. 1 represents has a horizontal cylinder 1 of milling, and a plurality of edges circumferentially evenly distributed roller 2 of milling are in this cylinder of milling.In this figure, only be decorated with five rollers 2 of milling.Their sum should be 8.Be respectively equipped with the bar 3 of milling of larger amt on the roller of respectively milling, people also can be called blade with them.The bar 3 of milling contacts material with the cylinder 1 of milling surface can be used in material common in this application (for example casting chromium steel of Cui Huoing) or use porous material, and for example the chromium steel of sintering is made.When implementing the method, respectively mill roller 2 with mill between the cylinder 1, the inwall at the described cylinder 1 of milling forms the district that mills with the bar 3 of milling respectively apart from hithermost places or position or rather.In order to produce the necessary power of milling, the roller 2 of milling radially is pressed against on the inwall of the cylinder 1 of milling.This has been drawn a spring 6 as example.Can certainly adopt other systems that produces pressure, for example pneumatic or hydraulic cylinder.Mill roller 2 rotatably by the rotating shaft supporting in fixed in space.This rotating shaft can be for example fixing by two pillars 7 that stretch into vertically in the cylinder of milling.The cylinder 1 of milling is driven rotation by a driven roller 4.But the driving possibility that other are also arranged.The roller 2 of milling does not need the drive unit of oneself, because they are being placed on the inwall of cylinder 1 of milling among the rotation.This means the remarkable grinding equipment of having simplified.
Aqueous suspension paper fiber is delivered near the inwall by one or more pipeline 9.Schematically drawn a this pipeline 9 among Fig. 1 a position, in this position for can see the clearer not expression roller of milling.Aqueous suspension paper fiber is owing to cylinder 1 rotation of milling is laid on its inwall as the fiber bed of material 8.Because pipeline 9 and pillar 7 equal fixed in space ground are provided with, thus can be easy to realize pipeline 9 at the center from pillar 7s supply suspension S.Mill on the inwall of cylinder 1 along circumferentially quickening and be distributed in from the fiber pulp suspension S of pipeline 9 output.It enters the district that mills that constitutes between the inwall of the mill roller 2 and the cylinder 1 of milling that are provided with the bar 3 of milling then.Usually should make every effort to make the fiber pulp suspension repeatedly flow through the district that mills.Owing to, the comparison homogeneous thickness is arranged so reach the fiber bed of material 8 at the centrifugal force of cylinder 1 inside of milling.As shown in Figure 2, the fiber pulp suspension S ' that grinds can discharge by the outlet on cylinder 1 circumference of milling 10.Here, fiber pulp suspension S ' imports in the circular passage 12 of a fixed-site by a seal 11.Seal 11 or circular passage 12 can be designed as, make with a limited portion that only is present in circumference being connected of circular passage 12 in.In order to guarantee that in the cylinder 1 of the milling fiber bed of material 8 has the thickness of regulation, can set up a back pressure in circular passage 12.A crossbeam 14 has been drawn as example in top at the cylinder 1 of milling in Fig. 1, settled some guide vanes 15 on this crossbeam 14.These guide vanes soak the axial conveying of inserting in the fiber bed of material 8 and causing stipulating.The back also will describe this axial conveying in detail.
The bar 3 of respectively milling under general situation is all arranged abreast with axis.But they also can become a sharp angle to intersect with the center line of the roller 2 of milling, so that for example help the axial conveying of fiber pulp suspension thus.These two kinds of possibilities are schematically represented shown in figure 2 on the single roller 2 of milling.
Fig. 3 represents a kind of grinding equipment of implementing the method that is applicable in side view.It is made up of the cylinder 1 of milling of a horizontal positioned.Can also see several supports 5 in the drawings.The roller of milling does not then illustrate.In order to realize as far as possible materials conveyance uniformly, fibrous material vertically from one distolateral 13 of the cylinder 1 of milling to side flow.Be drawn in the right of Fig. 3 here by the supply of pipeline 9, and on the left side has been represented the discharge by circular passage 12.The fixing crossbeam that has guide vane 15 14 in one or more locus be in cylinder 1 inwall of milling near.As shown in Figure 4, guide vane 15 is tilting with respect to circumferential 16, thereby causes fiber pulp suspension S that one axial dipole field 17 is arranged.Also can use one or more scrape beam 14 ', they sweep the inwall of the fiber bed of material 8 from the cylinder 1 of milling, and do loose and move axially by the guide vane that is placed in opposite side.
Grinding equipment shown in Figure 5 also has a horizontal cylinder 1 of milling, a plurality of rollers of evenly arranging along circumference 2 of milling ' be in this cylinder 1 of milling.In this figure, can see altogether ten rollers 2 of milling ' in three, their length is than 1/2nd smaller (see figure 7)s of cylinder 1 axial length of milling.Be used to drive mill cylinder 1 device be used to produce the device of the power of milling with illustrated in fig. 1 similar or identical.Roller 2 ' the rotating shaft fixing around the locus of milling rotates.These rotating shafts for example are bearing in the support 5 cantilever, and 5 on this support is fixed on one and passes vertically on the york piece 19 that the cylinder of milling extends.
As illustrating in conjunction with Fig. 1, after aqueous suspension paper fiber infeeded in the grinding equipment, it was also processed to distribute there.In order to produce a continuously uniformly suspension flow, advantageously at one of the cylinder 1 of milling or arrangement spout hole 20 two end faces 23 in preferably.These spout holes 20 can distribute equably along circumference.As dykes and dams, they have determined can constitute by it the height of liquid level 8 basically from the radial distance of cylinder 1 inwall of milling.As shown in Figure 6, the fiber pulp suspension S ' that grinds can enter in the circular passage 22 of fixing by seal 21.Seal 21 can be designed as, make with a limited portion that only is present in circumference being connected of circular passage 22 in, for example directly before pipeline 9 exit positions.In order to reduce the price of this bigger seal 21, can certainly direct into easily place of sealing by a pipeline that the does not have expression here broken fibrous material of will milling in company with rotation.
Under general situation, the bar 3 of respectively milling is arranged in parallel with an axis of milling.But also can make they with respect to the roller 2 of milling ' center line become a sharp angle so that for example help the axial conveying of fiber pulp suspension thus.These two kinds of possibilities schematically represent a single roller 2 of milling shown in Figure 6 ' on.
Fig. 7 is the side view of grinding equipment shown in Figure 5.It is made up of the cylinder 1 of milling of a horizontal positioned.By this figure as can be seen, respectively in a support 5 two rollers 2 of milling of cantilever ground supporting '.Can realize a kind of structure that can cause the part of interference on a small quantity of simply having only thus to suspension flow.In addition, the roller 2 of milling ' axial dimension can keep shortlyer, this helps fiber to mill equably.Fiber pulp suspension S be added on here by two vertically the pipeline 9 of partition distance carry out.
With disclosed different so far, the axial conveying in the tube of milling can also improve by some special forms of implementation, that is, adopt as the taper shape that schematically illustrates among Fig. 8 and mill tins 18.Its inwall is with respect to axially there being an angle of inclination beta, and this angle of inclination beta is preferably less than 5 °.Therefore, because centrifugal force when rotated forms the axial thrust load that can correspondingly utilize.Take these measures, can cancel fixing transport in some cases, the crossbeam 14 as shown in Fig. 1, Fig. 3 or Fig. 4 or scrape beam 14 '.
Claims (22)
1. method that grinds aqueous suspension paper fiber or paper pulp fiber, wherein, described aqueous suspension paper fiber flows by at least one district that mills, this district that mills is in the mill inwall of tube and at least one of a rotation and is installed in the roller (2 of milling on this tube of milling, 2 ') between, wherein, the described roller (2 of milling, 2 ') press mutually each other with the tube of milling, and the merit that grinds of machinery is passed to fiber, to change intensity by its paper of making, it is characterized by: described rotation mill the tube inwall on constitute a fiber bed of material (8) by described aqueous suspension paper fiber, this fiber bed of material (8) by rotary laying on described inwall, and a lasting liquid stream that will contain aqueous suspension paper fiber infeeds the described fiber bed of material (8) neutralization and discharges from this fiber bed of material again.
2. in accordance with the method for claim 1, it is characterized by: be equipped with lath (3) on the described roller of milling (2,2 '), they extend axially direction and angle (α) that the roller of milling (2,2 ') is axial between 0 and 45 °.
3. in accordance with the method for claim 2, it is characterized by: adopt a kind of tube of milling, its inwall is not engaged on mill the bar of milling between the bar (3) of the roller of milling (2,2 ').
4. according to claim 1,2 or 3 described methods, it is characterized by: see circumferentially that along the tube of milling being adjusted in the relative velocity hithermost place of two rollers of milling (2,2 ') in the described district that mills between an inwall and the roller of milling (2,2 ') of milling is at most 10% of tin (1) the inwall peripheral speed of milling.
5. according to claim 1,2,3 or 4 described methods, it is characterized by: the described roller of milling (2,2 ') is pressed with such power each other mutually with the tube of milling, that is, make in the district that mills, be created in 5 and 30N/mm between preferably be at least the linear force of 15N/mm.
6. according to the described method of above-mentioned each claim, it is characterized by: the described tube of milling is 20-40m/s on inwall with one, the preferably peripheral speed of about 30m/s rotation.
7. according to the described method of above-mentioned each claim, it is characterized by: described center line of milling tube is adjusted into one 0-5 ° angle with respect to horizontal line.
8. it is characterized by in accordance with the method for claim 7: the described tube of milling flatly is provided with.
9. according to the described method of above-mentioned each claim, it is characterized by: described paper fiber flow to the other end from an end of the tube of milling continuously vertically in the fiber bed of material (8).
10. it is characterized by in accordance with the method for claim 9: the aqueous suspension paper fiber in fiber pulp suspension (S) is supplied with, is milled then and discharge again in the outlet (10) at another the distolateral place of tube that mills by at least one after this by at least one pipeline of locating to import at the tube of milling inner distolateral (13) (9).
11., it is characterized by according to the described method of one of claim 1 to 8: the described paper fiber suspension that will mill (S) at least two be in mill the tube in, the place of partition distance is supplied to described liquid level (8) vertically.
12. it is characterized by in accordance with the method for claim 11: described supply is undertaken by near the pipeline (9) of its outlet liquid level (8).
13. according to claim 11 or 12 described methods, it is characterized by: described supply place evenly distributes along described axial dimension of milling tube.
14. according to the described method of above-mentioned each claim, it is characterized by: described paper fiber suspension (S ') through milling is derived from the described tube of milling by the spout hole (20) on one or more end faces (23) that are in the tube of milling.
15. it is characterized by in accordance with the method for claim 14: described spout hole (20) has been determined the thickness of described liquid level (8).
16. according to the described method of above-mentioned each claim, it is characterized by: the average consistency in the described district that mills is adjusted into 2% to 6%.
17., it is characterized by: adopt one to mill cylinder (1) as the described tube of milling according to the described method of above-mentioned each claim.
18. it is characterized by in accordance with the method for claim 17: the axial conveying of the described fiber bed of material (8) is carried out at the inner transport that extends along cylinder (1) length of milling of the described cylinder of milling (1) by at least one.
19. it is characterized by in accordance with the method for claim 18: adopt the crossbeam (14) that immerses the guide vane (15) in the described fiber bed of material (8) having of a fixed in space installation as described transport.
20. it is characterized by in accordance with the method for claim 18: the guide vane (15) that immerses in the fiber bed of material (8) having of adopting that fixed in space installs scrape beam (14 ') as described transport.
21. according to the described method of one of claim 1 to 16, it is characterized by: a described inwall of milling is designed to taper shape.
22. it is characterized by in accordance with the method for claim 21: described taper mill the tube (18) inclination angle (β) is arranged between 1 ° to 5 °.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10337922.3 | 2003-08-18 | ||
| DE10337921.5 | 2003-08-18 | ||
| DE2003137922 DE10337922A1 (en) | 2003-08-18 | 2003-08-18 | Refining assembly, for a suspension of papermaking paper/cellulose fibers, forms a fiber layer on the inner surface of the rotating drum with beater rollers pressed against it and a constant liquid flow in and out of the layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1823195A true CN1823195A (en) | 2006-08-23 |
Family
ID=34201647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200480020024 Pending CN1823195A (en) | 2003-08-18 | 2004-07-21 | Method for refining paper or cellulose fibers in an aqueous suspension |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1823195A (en) |
| DE (1) | DE10337922A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114381965A (en) * | 2022-02-15 | 2022-04-22 | 浙江恒川新材料有限公司 | Pulping equipment is used in straw body paper production |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007003964A1 (en) * | 2007-01-26 | 2008-01-24 | Voith Patent Gmbh | Wood-pulping equipment for paper- or card manufacture, employs compression refiner to complete fiber hydration and separation without damage |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE894499C (en) * | 1940-02-16 | 1953-10-26 | Belgique Papeteries | Device for treating fiber material, in particular paper stock |
| US2719463A (en) * | 1954-01-29 | 1955-10-04 | Anton J Haug | Machines for reducing and treating fibrous paper making materials |
| DE10236962A1 (en) * | 2002-08-13 | 2004-02-26 | Institut für Papier-, Zellstoff- und Fasertechnik der Technischen Universität Graz | Papermaking process compresses slow-speed fibers between a roller with shallow transverse grooves and a smooth interface |
-
2003
- 2003-08-18 DE DE2003137922 patent/DE10337922A1/en not_active Ceased
-
2004
- 2004-07-21 CN CN 200480020024 patent/CN1823195A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114381965A (en) * | 2022-02-15 | 2022-04-22 | 浙江恒川新材料有限公司 | Pulping equipment is used in straw body paper production |
| CN114381965B (en) * | 2022-02-15 | 2023-12-19 | 浙江恒川新材料有限公司 | Beating equipment is used in production of straw body paper |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10337922A1 (en) | 2005-03-17 |
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