CN1280477C - Method and apparatus and screen for screening mechanical fibre pulp - Google Patents
Method and apparatus and screen for screening mechanical fibre pulp Download PDFInfo
- Publication number
- CN1280477C CN1280477C CN01817401.9A CN01817401A CN1280477C CN 1280477 C CN1280477 C CN 1280477C CN 01817401 A CN01817401 A CN 01817401A CN 1280477 C CN1280477 C CN 1280477C
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- screen cloth
- fiber
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- slurry mixture
- fiber slurry
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- 239000000835 fiber Substances 0.000 title claims abstract description 238
- 238000012216 screening Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000004744 fabric Substances 0.000 claims description 102
- 239000000203 mixture Substances 0.000 claims description 99
- 239000002002 slurry Substances 0.000 claims description 92
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 6
- 230000004087 circulation Effects 0.000 claims description 5
- 238000007873 sieving Methods 0.000 claims description 5
- 229940089401 xylon Drugs 0.000 claims description 4
- 239000012634 fragment Substances 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims 1
- 239000002657 fibrous material Substances 0.000 description 15
- 238000010009 beating Methods 0.000 description 7
- 241000196324 Embryophyta Species 0.000 description 2
- 244000287680 Garcinia dulcis Species 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 2
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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Classifications
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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
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/02—Straining or screening the pulp
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Preliminary Treatment Of Fibers (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention relates to a method, an apparatus and a screen for screening mechanical fibre pulp. According to the invention a short fibre material is separated using a gap screen, whereby said material can be very efficiently separated to form a specific fraction.
Description
Technical field
The present invention relates to a kind of method that is used to sieve the fiber slurry mixture made from mechanical means, this mixture comprises the fiber of different length, in the method, in that the fiber slurry mixture that separates xylon under the situation of water and obtain is arranged, be screened into the two parts that comprise the fiber that mainly is different length at least by mechanically.
The invention still further relates to the equipment of a kind of screening with the fiber slurry mixture of mechanical means manufacturing, this mixture comprises the fiber of different length, this equipment comprises screening plant, be used to sieve by mechanically obtaining fiber slurry mixture in that separation xylon under the situation of water is arranged, this fiber slurry mixture is screened into the two parts that comprise the fiber that mainly is different length at least.
The invention still further relates to a kind of will the screening and become to comprise the two-part screen cloth of the fiber of different length basically with the fiber slurry mixture of the fiber that comprises different length of mechanical means manufacturing, this screen cloth comprises at least one screening surface, by this screening surface, water is removed from fiber slurry mixture, and some short fibers are removed with water, and remaining fiber slurry mixture is removed from sieve by the same side on screening surface, and described fiber slurry mixture is transported to the sub-sieve surface.
Background technology
Mechanical fiber slurry is to have under the situation of water, by timber being ground or thermomechanical pulp manufactures fiber, obtains fiber slurry mixture.Fiber with different beating degree values is made by the manufacture method with prior art typically.The separation of fiber is based on the process of a defibre and used material, and the ratio that has between the fiber of different beating degree values can not carry out bigger adjustment in the defibration process of reality.Therefore, consequently a kind of fiber slurry mixture, the pars fibrosa that wherein has different beating degree values and operating characteristic in use must not be the most satisfactory.After this, this fibrous material sieves with the method for prior art, and employing comprises the screen clothes on various screenings surface, makes less than specific dimensions and sieve surperficial fiber by one to be directed using, the crude fibre of removing from this process turns back to this process again by reject refining.But final result is a kind of fiber slurry mixture, wherein the length of fiber and therefore its beating degree value alter a great deal the structure of fiber slurry mixture and characteristic thereof and needed not meeting.When making a kind of specific paper, preferably use such mechanical fiber slurry, the staple fibre that it comprises high-quality long fiber and binding ability is arranged, but be not middle-sized in fact fiber.Adopt traditional mechanical fiber pulp screen separating method can not obtain such fiber pulp.
Summary of the invention
The purpose of this invention is to provide a kind of method, a kind of equipment and a kind of screen cloth, it can realize comprising mainly is the pars fibrosa of different length fiber, is used for the use of different purposes.
Method of the present invention is characterised in that, in at least one screening stage, adopt a gap screen cloth (gap screen), fiber slurry mixture or its part by sub-sieve from fiber slurry mixture or its part, to separate staple fibre, this gap screen cloth comprises a gap that reduces gradually, limit the net (wire) in described gap with at least one, thereby the fiber slurry mixture or its part that are sized are fed into the described gap that reduces gradually, make it flow with the output port of the direction identical towards the end that reduces gradually in described gap with net, and staple fibre and some water of being fed in the gap withdraw from by the opening in the net, and water withdraws from the output port of some remaining fiber slurry mixtures by the gap.
Equipment of the present invention is characterised in that, this equipment comprises a gap screen cloth that separates staple fibre, comprise a gap that reduces gradually, limit the described net that reduces the gap gradually with at least one, thereby the fiber slurry mixture or its part that are sized are fed into the described gap that reduces gradually, make it to flow through the gap screen cloth towards the end that reduces gradually in described gap with the identical direction of net, make staple fibre and some water opening from net pass through, and the fiber slurry mixture of remainder is discharged from the gap screen cloth by the output port at the place, the end that reduces gradually in gap.
Screen cloth of the present invention is characterised in that, this screen cloth is a gap screen cloth, comprise a gap that reduces gradually that limits by a net, fiber slurry mixture is fed into this gap, move with the direction identical with net, make water and staple fibre discharge, and the fiber slurry mixture of remainder is discharged from the output port of the end that reduces gradually in this gap by the opening of net.
Main thought of the present invention is to adopt the gap screen cloth, the fiber pulp material of very tiny staple fibre is separated from fiber slurry mixture, two nets of preferred employing, thereby obtain having the very short fibrous material of high Bauer McNett value, it adopts other method for sieving can not clearly be referred to as specific slurry.According to a preferred embodiment of the invention, preferably comprise the moderate-length and the fiber slurry mixture of short fibrous material, be used the described gap screen cloth rescreenings that two nets form by separating a part that long fiber is sized.According to second preferred embodiment of the present invention, the middle-sized fibrous material that comprises some fiber fines that separates from the gap screen cloth is carried out defibrination by further guiding.The result is to obtain comprising the part of the required characteristic of having of medium size and staple fibre.
The invention provides a kind of like this advantage, promptly a pars fibrosa is shorter than the part of a length-specific, can accurately separate from the fiber slurry mixture that comprises different length.The advantage that a preferred embodiment of the present invention provides is, long stapled fibrous material is at first sieved, adopt the gap screen cloth from the remainder that comprises medium size and short fiber material, to separate to have the very short fibrous material of high beating degree value then, the final result that obtains then is three fiber pulp parts that different qualities is arranged, they can mix mutually or mix with other fibrous material, to realize required fibroreticulate quality.Therefore, long fiber can combine with very short fiber, and to obtain a kind of quality of specific paper, this is impossible when the fibre bag of medium size is contained in the fiber pulp.
Therefore, the fiber pulp part of different qualities and length can obtain from the fiber pulp with the mechanical means manufacturing as required, and therefore required part can easily combine with fibroreticulate manufacturing, and can only use required fiber pulp partly to produce the fiber web of particular types.Therefore, can make the fiber web that only comprises long fiber and staple fibre, and the middle-sized fiber that obtains can be used for producing another kind of fiber web.
Description of drawings
Describe the present invention with reference to the accompanying drawings.
Fig. 1 schematically represents method and apparatus of the present invention,
Fig. 2 schematically represents the gap screen cloth that adopts in the method for the present invention,
Fig. 3 schematically represents to adopt the screening result of gap of the present invention screen cloth.
The specific embodiment
Fig. 1 schematically represents method and apparatus of the present invention, and wherein the beating degree value of particle fiber pulp is provided with in the mode of example, and the section (division) that is separated into different fiber pulp parts on this value basis can be performed.
Fig. 1 schematically represents, how material 1 that will separated fiber is directed into a defibrator 2, and this defibrator can be self a known grater or a fiberizer (refiner), thermomechanical pulp grinder typically.The fiber slurry mixture that obtains by fiber separation is directed into screening plant, perhaps at first be directed to one first screen cloth 3, on this screen cloth, mixture can for example be separated according to Bauer McNett value " 16 ", make comprise long fiber and this part by first screen cloth 3 begin to be further processed, and comprise long fiber and fragment and also not the part by described screen cloth be directed into one first recirculation fiberizer 4 and carry out defibrination, in this fiberizer, this part is returned to first screen cloth 3 and sieves.Then, the fiber longer than required length circulated continuously,, continues forward on stream then by first screen cloth up to it.First fiberizer can be a separation fiberizer, and perhaps the part that will return can also be returned to the defibrator 2 of a reality shown by dashed lines.
Comprise long fiber and the part of the fiber pulp by first screen cloth be directed to one second screen cloth 5 forward, at second screen cloth 5,, this part is sieved again for example on the basis of Bauer McNett value " 28 " in the fibre length of setting according to fibre length.The fiber pulp part by second screen cloth 5 is for further processing forward continuously, and can not partly be directed into second fiberizer 6 by the long fiber pulp of described screen cloth, and this fiberizer is a known fiberizer with regard to itself preferably.The fiber pulp that obtains from second fiberizer 6 is directed into one the 3rd screen cloth 7, from then on lack and pass through the fiber of described screen cloth than special length (particular length), the fiber of for example being arranged to Bauer McNett value " 40 " is guided in order to use forward, and therefore can not turn back to second fiberizer 6 by the fiber of screen cloth 7 again carries out defibrination.Therefore, with by the 3rd screen cloth 7 and wait mode to be used then, long fiber is done same circulation, and shortening up to it becomes required size.The fiber pulp part by second screen cloth 5 is directed into a fine screen mesh 8 according to the present invention, on this dusting cover, adopt a gap sieve fine fibre slurry part of separating from fiber pulp, to separate, the Bauer McNett value that fiber for example is set is " 200 " at least, and therefore corresponding long fiber is directed into one the 3rd fiberizer 9, its preferably a kind of known fiberizer own.The fiber pulp that obtains from the output of the 3rd fiberizer 9 partly comprises high-quality tiny and middle-sized part.
This gap screen cloth is the screen cloth that single net or two net constitute.Such screen cloth can remove effectively requirement particular length or recently from the shorter fiber pulp of fiber slurry mixture, therefore each several part separately forcefully, and required ratio is provided.Other screen cloth is known, and on behalf of a screen cloth that separates or two or more screen clothes, each screen cloth form a multilevel screen.And then use a gap screen cloth to separate staple fibre.
Fig. 2 schematically shows the gap screen cloth 10 of two web frames.This gap screen cloth preferably allows the fiber pulp screening according to the present invention be two parts.This gap screen cloth comprises two movably nets 11 and 12, forms relative screen surface, and it moves through the gap screen cloth, and returns, and becomes loop, assembles gap 13 thereby form one on its moving direction in the screen cloth of gap.Supporting structure 14 and 15 is placed online 11 and 12 the back side, i.e. 13 the opposite side in the gap.Net 11 and 12 is supported and leans against on supporting structure 14 and 15, and it comprises opening naturally, is used to fine fibre material and this tiny fibrous material of gap screen cloth removal from schematically illustrating as arrow A of accepting water and removing from the opening of net 11 and 12.Net 11 and 12 illustrates for example around rolling 16 and 17 circulations, and this is well known in the art.The both sides in the gap 13 at net 11 and 12 edges are closed naturally, make fiber slurry mixture suitably to supply to the gap screen cloth from feed path 18 under pressure, thereby remove water and tiny fibrous material as required.Also schematically show engine 19 and 20 among the figure, engine 19 and 20 makes respectively and rolls one of 16 and 17 and rotate, though engine can make each lift-over moving individually under normal conditions, perhaps makes the lift-over of requirement moving in mode well known in the art.Then engine 19 links to each other with a control module 21 that is included in the control device with 20, the for example rotating speed of engine is adjusted in permission, thereby net 11 and 12 is moved with required speed, and this speed can have deviation with the flow velocity of fiber pulp by screen cloth and preferably surpass the flow velocity of fiber slurry mixture.
During sieving, fiber slurry mixture is transported to the gap screen cloth from feed path 18, and therefore mixture is by the gap 13 of screen cloth, and 13 narrower output port 22 flows out from the gap, be that the output port cross section is than supplying with the little outlet of opening, from the same side or the original net same side outflow that is transported to of fiber slurry mixture of screen surface.Simultaneously, because the structure of net 11 and 12, water and staple fibre are removed from the opening of net.According to the quantity of removed fibrous material, the translational speed of net can be transported to the transfer rate on the screen cloth and is adjusted with respect to fiber slurry mixture, up to obtaining required screening result.Simultaneously, and be retained in not by net, promptly the water yield in the fiber pulp part that flows out of the output port by gap 13 is compared, and more water can be removed from the fiber slurry mixture that has the short fibered pulp part.Therefore, long fiber pulp part can also be thickeied simultaneously, and denseness can rise to 10%.In this application and claim, output port 22 is meant the part of screen cloth, water and fiber no longer are removed by one or more net, and remaining fiber slurry mixture was delivered directly to possible subsequently the processing stage from the screening stage, perhaps by for example net or the analog control and be transported to possible subsequently processing stage of various conveyers and control device.
What can inevitable also influence this part quality is size and the penetration of suitably selecting net 11 and 12, thereby adopts the net with different through characteristics to be used for different purposes.What also can influence screening also has, one or two screen clothes are arranged to move towards the gap along the supporting structure of projection, therefore at the delivery end of screen cloth, water and tiny fiber are more effectively removed from the fiber pulp part, and correspondingly slower output port towards the gap screen cloth moves.If adopt single web frame, then in the net 11 and 12 can for example be replaced by a fixing wall surface, and a kind of combination can preferably be used, wherein 11 towards arch support structures 14 of net move, and specific wall surface is replaced the net 12 that directly moves at gap area.
In fact, the adjustment of screening is main according to a fact, i.e. the basis weight of the fiber slurry mixture that comprises long stapled fibrous material of described gap screen cloth is flow through in gap screen cloth adjustment.Supply to the denseness of the fiber slurry mixture of screen cloth by adjustment, perhaps net is with respect to the speed of the transfer rate of fiber slurry mixture, and realizes aforesaid operations.When the fiber slurry mixture of a dilution is fed in the screen cloth of gap, to compare when being supplied under similar circumstances with thicker fiber slurry mixture, more staple fibre can be removed from fiber slurry mixture.Therefore, if the speed of net is increased with respect to the transfer rate of fiber slurry mixture, then more staple fibre can be removed from fiber slurry mixture.Therefore, by adjusting the speed of supplying with denseness and/or net, the separation value of staple fibre can be set at a required level, make that resulting result is obvious different fiber pulp part, wherein the part by net only comprises very short fiber, and the part that correspondingly flows through the gap of gap screen cloth comprises long fiber but considerably less staple fibre is arranged.The speed of net can be adjusted in every way, makes it remain on below the fiber pulp transfer rate, surpasses the fiber pulp transfer rate, perhaps equals the fiber pulp transfer rate.The selection of speed is based on the characteristic of the fiber slurry mixture that will be sized and required screening result.
Fig. 3 schematically represents the screening result that the method according to this invention is obtained by the gap screen cloth shown in Fig. 1.Fig. 3 represents screening result, perhaps neutralizes from the part that the output port of gap screen cloth withdraws from the pars fibrosa with different B auer McNett value in the fiber slurry mixture that is supplied to and accordingly in the part by the gap.Fig. 3 represents to have the pars fibrosa of different B auerMcNett value, its method for expressing is, pars fibrosas different in the fiber slurry mixture that is supplied to of whole fiber slurry mixture are represented with black post, and the corresponding pars fibrosa of corresponding Bauer McNett value that has that comprises from the fiber pulp part that output port is discharged is represented with white post.Fig. 3 represent that pars fibrosa has Bauer McNett value 30 or when bigger near 30%, pars fibrosa with Bauer McNett value scope from 50 to 30 is near 16%, pars fibrosa with Bauer McNett value scope from 100 to 50 is to be about 13%, pars fibrosa with Bauer McNett value scope from 200 to 100 is near 7%, and the very tiny fibre weight with Bauer McNett value 200 is 34%.The average Bauer McNett value of the fiber slurry mixture that is supplied in this case, is 100.
The fiber pulp of having finished screening represents that the crude fibre part has raise pro rata near 50%, and it is nearly 25% that the fiber of next has raise, and short fiber only increases a little.By net, extremely Duan fiber and water are removed together largely, and therefore the staple fibre part has reduced 60% pro rata.In fact, this means to have only extremely short fibrous material in the screen cloth of gap, from the fiber slurry mixture that is supplied to, to be removed in fact, the Bauer McNett value of described short fiber material in this example near 200 or higher.Therefore, extremely Duan fiber can be removed from the fiber slurry mixture that will be sized effectively, therefore and by the fiber pulp of requirement is partially mixed in long fiber for example, obtain to be used for the specific fiber pulp part of various purposes, so that make the fiber web that particular characteristics is arranged of particular form.Therefore improved average beating degree value by the fiber slurry mixture of gap screen cloth.
Fig. 3 represents by being zero on the long fiber quality entity in the described part of net, and correspondingly the amount by the staple fibre in the long fiber part of gap screen cloth is very low.The operation of this expression gap screen cloth is very effective, and fiber slurry mixture is divided into forcefully two parts of obvious different length.The structure of sieving Webweb in the gap allows to determine for the suitable screening condition of the fiber of different length according to the suitable selection of using, and adjusts screening efficiency by the speed and/or the denseness of controlling fiber pulp mixture.
The present invention is described in specification and accompanying drawing by way of example, but is not only to be defined as like that.Its essence is to adopt a gap screen cloth to sieve with the fiber pulp that mechanical means is made in following mode: the staple fibre part is therefrom separated, and obtain the fiber pulp part of the predetermined fibre length of requirement, and preferably make the staple fibre part from the fiber pulp of wherein separating, be separated, and therefore staple fibre can be separated as far as possible effectively from remaining fibrous material from such long fiber.
Claims (19)
1. the method for the fiber slurry mixture made with mechanical means of a screening, this mixture comprises the fiber of different length, in the method, fiber slurry mixture is by separating xylon with mechanical means and obtain having under the situation of water, this fiber slurry mixture is screened into two parts of the fiber that comprises different length at least, it is characterized in that, in at least one screening stage, adopt a gap screen cloth (10), fiber slurry mixture or its part are sieved, the staple fibre that comes from the separation of fiber slurry mixture or its part, this screen cloth comprises a gap that reduces gradually (13), with at least one net (11 that limits described gap, 12), thereby will be delivered into the described gap that reduces gradually (13) by the fiber slurry mixture that will sieve or its part, make it flow with the output port of the direction identical towards the place, the end that reduces gradually in described gap with net, and staple fibre and some water that are transported in the gap withdraw from by the opening in the net, and water withdraws from the output port of some remaining fiber slurry mixtures by the gap.
2. method as claimed in claim 1, it is characterized in that, employing comprises the gap screen cloth (10) on two screening surfaces, move with identical direction on these two screening surfaces, and one facing to a ground placement, and at two nets (11,12) form the described gap that reduces gradually (13) between, described fiber slurry mixture or its part are fed between two nets, make mixture flow with the output port that the direction identical with net is in towards the end that reduces gradually in described gap between the net, and staple fibre and some water of being transported in the gap withdraw from by the opening in two nets, and water withdraws from the output port of some remaining fiber slurry mixtures by the gap.
3. as the method for claim 1 or 2, it is characterized in that long fiber at first separates and forms long stapled part, adopts described gap screen cloth to separate staple fibre then from remaining fiber slurry mixture from fiber slurry mixture.
4. method as claimed in claim 3 is characterized in that, after staple fibre separated, remaining fiber slurry mixture was further guided to carry out defibrination.
5. method as claimed in claim 3, it is characterized in that, the long stapled part that comprises of separating from fiber slurry mixture is carried out defibrination by further guiding, and sieved by further guiding at the fiber slurry mixture that defibrination obtains later on, with the part of the fiber that obtains comprising length-specific, and the waste material that obtains from screening is returned again with defibrination.
6. as claim 1,2,4 or 5 method, it is characterized in that, from the defibre of timber and the fiber slurry mixture that obtains at first be directed sieving, and comprise the fiber of different length and the part by described screening be directed into subsequently screening stage, comprise that the part of remaining long fiber and chip material is directed carrying out defibrination from this screening, should partly be directed turning back to described screening by the fiber pulp of defibrination then.
7. the equipment of the fiber slurry mixture made with mechanical means of a screening, this mixture comprises the fiber of different length, this equipment comprises screening plant, be used to sieve having under the situation of water and separate xylon and obtain fiber slurry mixture with mechanical means, this fiber slurry mixture is screened into two parts of the fiber that comprises different length at least, it is characterized in that, this equipment comprises a gap screen cloth (10) that separates staple fibre, comprise a gap that reduces gradually (13), with at least one net (11,12), described net limits the described gap that reduces gradually, thereby the fiber slurry mixture or its part that are sized are fed into the described gap that reduces gradually, make it flow through the gap screen cloth towards the end that reduces gradually in described gap with the direction identical with net, make staple fibre and some water withdraw from, and the output port that the fiber slurry mixture of remainder is located by the end that reduces gradually of (13) in the gap withdraw from from the gap screen cloth by the opening in the net.
8. equipment as claimed in claim 7, it is characterized in that, this gap screen cloth (10) comprises two screening surfaces, move with identical direction, and one facing to a ground placement, and at two nets (11,12) form the described gap that reduces gradually (13) between, fiber slurry mixture or its part are fed between two nets, make mixture flow with the output port of the direction identical towards the place, the end that reduces gradually in this gap with net, make staple fibre and some water withdraw from, and the fiber slurry mixture of remainder withdraw from the gap screen cloth by the output port between the net of locating in the end that reduces gradually in this gap by the opening in two nets.
9. as the equipment of claim 7 or 8, it is characterized in that this equipment comprises one first screen cloth (3), be used to separate oversize fiber and fragment from the fiber slurry mixture that forms after the defibre.
10. equipment as claimed in claim 9, it is characterized in that, this equipment comprises, is used for carrying out the device of defibrination to comprising by the isolated oversize fiber of the fiber slurry mixture of first screen cloth (3) and the part of fragment, and is used for described part is turned back to this first screen cloth.
11. the equipment as claim 10 is characterized in that, this device that is used for the fiber slurry mixture that comprises oversize fiber and chip material is carried out defibrination comprises one first fiberizer (4), and this fiber pulp partly is directed into carries out defibrination in this fiberizer.
12. equipment as claimed in claim 9 is characterized in that, this equipment comprises one second screen cloth (5), is used for the fiber slurry mixture by first screen cloth (3) is separated into two parts.
13. the equipment as claim 12 is characterized in that, this second screen cloth (5) is connected to described gap screen cloth (10), is used for the fiber slurry mixture by second screen cloth is directed to the gap screen cloth in order to separate staple fibre there.
14. equipment as claim 12, it is characterized in that, this equipment comprises one second circulation fiberizer (6), be used for partly carrying out defibrination from the isolated long stapled fiber pulp of second screen cloth (5), one the 3rd screen cloth (7) sieves and is used for turning back to by this part of the 3rd screen cloth the device of the second circulation fiberizer to the fiber slurry mixture that obtains from the second circulation fiberizer.
15. the equipment as claim 7 or 8 is characterized in that, this equipment comprises a fiberizer (9), is used for the long fiber from gap screen cloth (10) is partly carried out defibrination.
16. one kind will be sieved the two-part screen cloth of the fiber that becomes to comprise different length with the fiber slurry mixture of the fiber that comprises different length of mechanical means manufacturing, this screen cloth comprises at least one screening surface, by this screening surface, water is removed from fiber slurry mixture, and some short fibers are removed with water, and remaining fiber slurry mixture is removed in the screening surface same side that is supplied to fiber slurry mixture from screen cloth, it is characterized in that, this screen cloth is a gap screen cloth (10), comprise by a net (11,12) gap (13) that reduces gradually of Xian Dinging, fiber slurry mixture is fed into this gap, with with net (11,12) identical direction moves, water and staple fibre withdraw from by the opening of net (11,12) thus, and the output port that the fiber slurry mixture of remainder is located by the end that reduces gradually of gap (13) withdraws from.
17. screen cloth as claim 16, it is characterized in that, this gap screen cloth (10) comprises two nets (11,12), move with identical direction, and form relative screen surface, form the described gap that reduces gradually (13) between this net, fiber slurry mixture or its part are delivered into this gap to move with identical direction between two nets, water and staple fibre are by two nets (11 thus, 12) opening withdraws from, and the fiber slurry mixture of remainder withdraws from by the output port between two nets (11,12) at the place, the end that reduces gradually in this gap.
18. the screen cloth as claim 16 or 17 is characterized in that, this screen cloth comprises that control device is to be used to adjust each net (11,12) is transported to the transfer rate of this screen cloth with respect to fiber slurry mixture movement velocity.
19. the screen cloth as claim 16 or 17 is characterized in that, this screen cloth comprises the device of the denseness that is used to adjust the fiber slurry mixture that will be transported to this screen cloth.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20002283 | 2000-10-16 | ||
| FI20002283A FI110619B (en) | 2000-10-16 | 2000-10-16 | Method and apparatus for sorting mechanical pulp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1553979A CN1553979A (en) | 2004-12-08 |
| CN1280477C true CN1280477C (en) | 2006-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01817401.9A Expired - Fee Related CN1280477C (en) | 2000-10-16 | 2001-10-16 | Method and apparatus and screen for screening mechanical fibre pulp |
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| Country | Link |
|---|---|
| US (1) | US20040011483A1 (en) |
| EP (1) | EP1334230B1 (en) |
| JP (1) | JP2004511676A (en) |
| CN (1) | CN1280477C (en) |
| AT (1) | ATE338159T1 (en) |
| AU (2) | AU1059602A (en) |
| BR (1) | BR0114591A (en) |
| CA (1) | CA2425511A1 (en) |
| DE (1) | DE60122766T2 (en) |
| ES (1) | ES2269473T3 (en) |
| FI (1) | FI110619B (en) |
| NO (1) | NO20031662L (en) |
| NZ (1) | NZ524942A (en) |
| WO (1) | WO2002033165A1 (en) |
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| GB0413068D0 (en) * | 2004-06-11 | 2004-07-14 | Imerys Minerals Ltd | Treatment of pulp |
| SE533736C2 (en) * | 2009-03-19 | 2010-12-21 | Metso Paper Inc | Device, system and method for treating cellulose pulp |
| FR2995325B1 (en) * | 2012-09-11 | 2015-03-13 | Ct Tech De L Ind Des Papiers Cartons Et Celluloses | PROCESS FOR PRODUCING A MULTILAYER FIBROUS MEDIUM BY FRACTIONATION AND STRATIFICATION |
| US11214925B2 (en) | 2015-08-21 | 2022-01-04 | Pulmac Systems International, Inc. | Method of preparing recycled cellulosic fibers to improve paper production |
| US10041209B1 (en) | 2015-08-21 | 2018-08-07 | Pulmac Systems International, Inc. | System for engineering fibers to improve paper production |
| US10941520B2 (en) | 2015-08-21 | 2021-03-09 | Pulmac Systems International, Inc. | Fractionating and refining system for engineering fibers to improve paper production |
| CN115418878A (en) * | 2022-08-17 | 2022-12-02 | 中集竹链科技有限公司 | Material screening system and screening method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5228954A (en) * | 1991-05-28 | 1993-07-20 | The Procter & Gamble Cellulose Company | Cellulose pulps of selected morphology for improved paper strength potential |
| US5405499A (en) * | 1993-06-24 | 1995-04-11 | The Procter & Gamble Company | Cellulose pulps having improved softness potential |
| WO1997032079A1 (en) * | 1996-02-28 | 1997-09-04 | Alfa Laval Ab | Improved recovery of fine fibers from suspensions containing fibers and contaminants |
| US5916417A (en) * | 1997-08-22 | 1999-06-29 | International Paper Company | Method of making multi-ply paperboard sheet having layers of different fiber properties |
| FI108152B (en) * | 1999-07-22 | 2001-11-30 | Metso Paper Inc | Method and apparatus for washing a fiber pulp mixture |
-
2000
- 2000-10-16 FI FI20002283A patent/FI110619B/en not_active IP Right Cessation
-
2001
- 2001-10-16 DE DE60122766T patent/DE60122766T2/en not_active Expired - Lifetime
- 2001-10-16 AU AU1059602A patent/AU1059602A/en active Pending
- 2001-10-16 AU AU2002210596A patent/AU2002210596C1/en not_active Ceased
- 2001-10-16 EP EP01978484A patent/EP1334230B1/en not_active Expired - Lifetime
- 2001-10-16 JP JP2002536131A patent/JP2004511676A/en active Pending
- 2001-10-16 CA CA002425511A patent/CA2425511A1/en not_active Abandoned
- 2001-10-16 ES ES01978484T patent/ES2269473T3/en not_active Expired - Lifetime
- 2001-10-16 AT AT01978484T patent/ATE338159T1/en active
- 2001-10-16 CN CN01817401.9A patent/CN1280477C/en not_active Expired - Fee Related
- 2001-10-16 WO PCT/FI2001/000896 patent/WO2002033165A1/en active IP Right Grant
- 2001-10-16 BR BR0114591-6A patent/BR0114591A/en not_active IP Right Cessation
- 2001-10-16 NZ NZ524942A patent/NZ524942A/en not_active IP Right Cessation
-
2003
- 2003-04-10 NO NO20031662A patent/NO20031662L/en not_active Application Discontinuation
- 2003-04-16 US US10/414,816 patent/US20040011483A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| AU1059602A (en) | 2002-04-29 |
| FI110619B (en) | 2003-02-28 |
| EP1334230B1 (en) | 2006-08-30 |
| ATE338159T1 (en) | 2006-09-15 |
| EP1334230A1 (en) | 2003-08-13 |
| NZ524942A (en) | 2004-12-24 |
| BR0114591A (en) | 2003-10-14 |
| NO20031662D0 (en) | 2003-04-10 |
| AU2002210596C1 (en) | 2006-09-28 |
| US20040011483A1 (en) | 2004-01-22 |
| NO20031662L (en) | 2003-04-10 |
| CA2425511A1 (en) | 2002-04-25 |
| FI20002283A (en) | 2002-04-17 |
| CN1553979A (en) | 2004-12-08 |
| FI20002283A0 (en) | 2000-10-16 |
| ES2269473T3 (en) | 2007-04-01 |
| DE60122766T2 (en) | 2007-08-30 |
| WO2002033165A1 (en) | 2002-04-25 |
| AU2002210596B2 (en) | 2006-05-18 |
| JP2004511676A (en) | 2004-04-15 |
| DE60122766D1 (en) | 2006-10-12 |
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Granted publication date: 20061018 Termination date: 20121016 |