CN101529016A - Press washer comprising separation of filtrates - Google Patents
Press washer comprising separation of filtrates Download PDFInfo
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- CN101529016A CN101529016A CNA200780040006XA CN200780040006A CN101529016A CN 101529016 A CN101529016 A CN 101529016A CN A200780040006X A CNA200780040006X A CN A200780040006XA CN 200780040006 A CN200780040006 A CN 200780040006A CN 101529016 A CN101529016 A CN 101529016A
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- filter liquor
- pulp
- gathering
- passage
- compression roller
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- 239000000706 filtrate Substances 0.000 title abstract description 17
- 238000000926 separation method Methods 0.000 title description 2
- 238000005406 washing Methods 0.000 claims abstract description 54
- 239000000835 fiber Substances 0.000 claims abstract description 44
- 230000006835 compression Effects 0.000 claims description 68
- 238000007906 compression Methods 0.000 claims description 68
- 229920001131 Pulp (paper) Polymers 0.000 claims description 39
- 229920002678 cellulose Polymers 0.000 claims description 8
- 239000001913 cellulose Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 3
- 239000003085 diluting agent Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000004140 cleaning Methods 0.000 description 9
- 239000000243 solution Substances 0.000 description 8
- 239000012530 fluid Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000032258 transport Effects 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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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
- D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
- D21C9/06—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents in filters ; Washing of concentrated pulp, e.g. pulp mats, on filtering surfaces
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Filtering Materials (AREA)
Abstract
The invention relates to a washing arrangement (100) comprising two co-operating cylindrical press rolls (102), at least one having a perforated outer surface (104). There is a guide surface (106) at a distance from the perforated outer surface partially enclosing the press roll in the circumferential direction, and a pulp passage (108) is provided between the perforated outer surface and the guide surface. During operation, pulp fed into the pulp passage is guided in direction of rotation and pressed between the press rolls. Filtrate passes through the perforated surface and into the press roll. It is proposed to provide the washing arrangement with means for separate collection of a filtrate flow (128) from a first portion of the pulp passage. Such filtrate contains comparatively high amounts of fiber and can by means of the invention be handled separately from the main filtrate flow (130), reducing the negative effects associated with fibers in the filtrate.
Description
Technical field
The present invention relates to the washing of cellulose pulp, specifically, relate to the extruding washing (press washing) that the cylindrical press rolls of joining with two associations is carried out.
Background technology
Pulp washing is the key operation in the chemistry system paper pulp production line.Have many dissimilar wash engines available, wherein some is based on extruding washing it comprises extruding paper pulp and removes the device of fluid.After extruding, paper pulp is diluted to the thickness of requirement usually.
A kind of press washer of well-known type has the cylindrical press rolls that two associations join, and they are arranged to make its center of rotation to be positioned at same horizontal plane.The outer surface of each compression roller is a porous, in operating process, cellulosic paper pulp is input in the restricted clearance between flow roll surface and the limiting member (for example, groove), thus, forms pulp web on the flow roll surface.Compression roller is arranged to rotate along relative direction, so that in rotational direction transport corresponding pulp web, is to push pulp web in the so-called roll gap of minimum with the distance between compression roller.
The radially inside direction of the fluid of removing from paper pulp (that is, filter liquor) is passed through the flow roll surface, for example, and can be by means of axial filter liquor passage with the end of fluid transport to respective press roll.Usually be provided with the flow container that leaches that is connected to press washer, be used for collecting all filter liquors that generate when washing in the press master.Usually the cleaning solution source of supply that leads to press washer in addition, because the fluid in the cleaning solution displacement paper pulp, so washing principle will be the combination of dehydration, displacement and extruding in this case.
For example, United States Patent (USP) 3,980 has disclosed a kind of press washer of described universal class in 518.
The filter liquor that press washer output is quite a large amount of, for the general objective of the cellulose pulp treatment system that meets sealing, this filter liquor turns back to previous processing level usually as much as possible to dilute.Yet the processing of filter liquor quite is a problem, especially because filter liquor usually contains a large amount of fibers.Filter liquor is recycled to some part that can cause equipment in the previous processing level to be stopped up and obstruction.If filter liquor is scavenged in ppu or the receiver, then need come recycled fiber such as the such external equipment of fabric filter sometimes.
Therefore, need the suitable mechanism that reduces the problems that filter liquor that press washer produces brings.
Summary of the invention
General purpose of the present invention provides a kind of improvement structure that is used for the plain paper pulp of washing the fibre.One special purpose is to realize improved filter liquor processing in having the press washer of cylindrical press rolls.Another purpose is the fiber content that reduces in the filter liquor output stream that flows out from press washer.The purpose that also has other is to make press washer that higher output and/or uncomplicated fiber recovery mechanism be arranged.
These purposes realize according to attached claims are described.
In brief, the present invention is based on such understanding: terminate in the major part in all fibres in the filter liquor and be from: quite little stream and the relative paper pulp that is close to input and meet in the zone of the position of the press roll surface of cleaning.Therefore this filter liquor is collected in suggestion dividually, thus, reduces fiber content level in the filter liquor main flow.Like this, the relevant negative effect of fiber that can avoid or reduce to contain in the filter liquor.
Therefore according to the present invention, provide the structure of the plain paper pulp of a kind of washing the fibre, this structure comprises two compression rollers, and these two compression rollers are arranged to have the porous outer surface along relative direction rotation and at least one compression roller in operating process; Guide surface, it is arranged in the porous outer surface a distance from this at least one compression roller, so that along circumferentially partly surrounding compression roller; Pulp passage roughly is arranged between porous outer surface and the guide surface, and in operating process, the paper pulp that is fed in the pulp passage is squeezed in two roll gaps between the compression roller along the rotation direction transportation and at the place, end of pulp passage; And novel filter liquor gathering-device, it is arranged to collect and passes the porous outer surface and enter the interior filter liquor of compression roller.The filter liquor gathering-device that is proposed comprises the first filter liquor gathering-device that is arranged to accept the filter liquor main flow; And the second filter liquor gathering-device that is arranged to accept the filter liquor that flows out from the first of pulp passage, thus, the filter liquor relevant with the first of pulp passage can be handled dividually with the filter liquor main flow.Normally, the filter liquor relevant with the first of pulp passage is the filter liquor of high fiber content, in the processing level that the second filter liquor gathering-device can make this filter liquor be directed to be applicable to high fiber content.
In one embodiment, washing arrangement also comprises the separately output device of exporting the filter liquor of being collected by the second filter liquor gathering-device (or by more than one second filter liquor gathering-device) from washing arrangement dividually, and separately the device of output can be transportation and is connected to suitable external treatment level.The device that so separates output can be embodied as filter liquor outlet, or is embodied as two or more filter liquor outlets that separate.
Preferably, the first of pulp passage begins part from pulp passage and extends, and has along a circumferential length, and this length can reach 40% of pulp passage total length.
The washing arrangement of being advised can obtain a plurality of advantages, comprising:
● reduce fiber content in the filter liquor
● can reduce the size of the equipment of recycled fiber from filter liquor
● the open area (higher output is provided) of compression roller can be increased and fiber loss can be do not increased
● the diameter (higher output is provided and reduces manufacturing cost) of compression roller mesopore can be increased and fiber loss can be do not increased
According to a further aspect of the invention, provide a kind of system that handles cellulose pulp.
Description of drawings
With reference to the following description and drawings, can understand other purpose and advantage of the present invention and the present invention best, in the accompanying drawing:
Fig. 1 is the schematic transverse sectional view that can adopt the washing arrangement of a demonstration of the present invention;
Fig. 2 is a stereogram, and the compression roller operating principle that two associations of pulp washing mechanism join among Fig. 1 is shown;
Fig. 3 is the signal view of section view end that has the conventional washing structure of filter liquor gathering-device;
Fig. 4 is the signal view of section view end of washing arrangement that has the filter liquor gathering-device of one example embodiment according to the present invention;
Fig. 5 is the diagrammatic side view of washing arrangement that has the filter liquor gathering-device of one example embodiment according to the present invention;
Fig. 6 illustrates a washing arrangement that has a filter liquor gathering-device of another example embodiment according to the present invention;
Fig. 7 illustrates a washing arrangement that has a filter liquor gathering-device that also has another example embodiment according to the present invention;
Fig. 8 is the schematic block diagram of a system of the processing cellulose pulp of one example embodiment according to the present invention; And
Fig. 9 is the schematic block diagram of a system of the processing cellulose pulp of another example embodiment according to the present invention.
The specific embodiment
In the accompanying drawings, similar or corresponding elements will be represented with identical label.
Fig. 1 illustrates the washing arrangement that can adopt a demonstration of the present invention.This washing arrangement 100 is structures of the universal class described in the background technology, and it comprises cylindrical press rolls/pressure cylinder 102 that two associations in the shell 103 join.Two compression rollers 102 are arranged to rotate (as shown by arrows) along relative direction in operating process, and respectively have porous outer surface 104, such as the surface of expanded metal.Washing arrangement 100 also has guide surface 106, guide surface is arranged to the porous outer surface 104 with a certain distance from respective press roll 102, so that along circumferentially partly surrounding compression roller, thus, between porous outer surface 104 and guide surface 106, form pulp passage 108.
In running, the paper pulp that are fed in the pulp passage 108 from paper pulp inlet 109 in rotational direction are directed to surface 106 guiding, and are compressed in the so-called roll gap 110 between the compression roller 102.Shown in example in, paper pulp enters in the pulp passage 108 in the input of the top of respective press roll 102, paper pulp forms pulp web 112 on porous outer surface 104 there.Compression roller 102 rotates along relative direction, thereby in rotational direction transports corresponding pulp web 112, and making its distance that is compressed between the compression roller 102 is in the roll gap 110 of minimum.Shown in compression roller 102 comprise axial filter liquor passage 114, the filter liquor passage is accepted the filter liquor pass porous outer surface 104.In this example, cleaning solution is located to be fed on the pulp web at two diverse locations (pipeline 116) of each compression roller 102.Export paper pulp by means of screw-rod structure 118, this structure 118 is transported to thereafter processing level (not shown) with paper pulp, for example, vertical tube or other unit, paper pulp can dilute and handle there.
Fig. 2 illustrates the operating principle of the compression roller 102 that two associations of washing arrangement shown in Figure 1 for example join.Compression roller porous outer surface 104 is partly cut, so that demonstrate the motion of filter liquor.(in the sketch of Fig. 2, the actual hole/opening that is installed with omits in the porous outer surface 104.) filter liquor passes porous outer surface 104 and radially inwardly be transported in the axial filter liquor passage 114 of compression roller 102, after this, as shown by arrows, filter liquor is shifted to the end 120 of compression roller 102, and there, filter liquor is from compression roller 102 outputs.The rotation direction of compression roller 102 also as shown in Figure 2.Center of rotation is usually placed in the same horizontal plane, and it is fixing preferably can taking a center of rotation usually, and allows another center of rotation to slide slightly.
The filter liquor that washing arrangement according to described operating principle operation produces is measured.In table 1, twice test provided the filter liquor content (mg/liter (mg/litre)) at make progress in week diverse location A, B...E place.For the press washer that has near the paper pulp of compression roller topmost portion inlet, position A, B...E are corresponding in rotational direction from paper pulp about 20,75,130,200 and 250 degree that enter the mouth.In test 1, the average fiber in the filter liquor is 496mg/liter, and feed consistency is 5.2%, and presenting flow is 200m
3/ h.In test 2, the average fiber in the filter liquor is 131mg/liter, and feed consistency is 6.0%, and presenting flow is 120m
3/ h.
Table 1
| A | B | C | D | E | |
| Test 1 | 2817 | 1145 | 1080 | 509 | 357 |
| Test 2 | 792 | 517 | 370 | 102 | 89 |
Find that the normally quite little filtrate flow of filter liquor from pulp passage first flows out has unexpected high fibre weight.According to this understanding, the present invention proposes a kind of structure, and it is suitable for collecting dividually the filter liquor of this high fiber content.
Now explain principle of the present invention with reference to Fig. 3 and 4.Fig. 3 illustrates the traditional washing arrangement 100 that has the filter liquor gathering-device.When filter liquor arrived the end of compression roller 102, the filter liquor inflow of flowing out from all axial filter liquor passages 114 had altogether in the collection container 122 together.When the filter liquor in the collection container 122 reached predetermined liquid level, filter liquor was guided the outside flow container (not shown) that leaches into from collection container 122 usually.
Fig. 4 illustrates the washing arrangement 100 of the filter liquor gathering-device that has the example embodiment according to the present invention.Here, the filter liquor that flows out from the first of pulp passage 108 is collected with being separated.The first filter liquor gathering-device 124 is not only arranged, and it is arranged to accept the filter liquor main flow, and also has the second filter liquor gathering-device 126, and it is arranged to accept the filter liquor that flows out from the first of pulp passage 108.Be suitable for collecting the filter liquor that is transported at least one end of compression roller by the subclass of axial filter liquor passage 114 in the such washing arrangement 100 of the washing arrangement of the second filter liquor gathering-device 126 in image pattern 4.From the washing arrangement outflow at least two 128,130, one of filter liquors output streams being arranged is main flows of filter liquor, and another is the filtrate flow of the high fiber content of separate collection.Therefore, the output of the filter liquor of high relatively fibre weight separately arranged from washing arrangement.In the example of Fig. 4, disclosed two output streams 128 with high fiber content filter liquor, flow out an output stream from each groove 126.Filter liquor gathering-device 124,126 according to the present invention can make filter liquor relevant with the first of pulp passage 108 and filter liquor main flow 130 handle dividually.
According to the present invention, collect dividually along the circumferential filter liquor that flows out from first and second parts of pulp passage.This means filtrate flow separately, they originate from same pulp passage and " same " paper pulp.Therefore separate by means of filter liquor of the present invention is to separate along circumferential filter liquor.
Along circumferentially, pulp passage 108 is incorporated into position on the outer surface 104 of compression roller 102 or zone and extends to roll gap 110 between the compression roller from paper pulp.The first of pulp passage is that pulp passage 108 is away from that part of the roll gap between the compression roller 102 110.In other words, " first " is meant that paper pulp at first runs into the pulp passage part of clean metal sheet surface basically of compression roller 102.For having the first half place (with respect to center of rotation) that is arranged at least one compression roller washing arrangement 100 with pulp passage 108 direct-connected paper pulp inlets 109, as shown in Figure 4 all, the first of pulp passage 108 is positioned near the paper pulp inlet and 109 (in its vicinity) located.
In addition, the expression way of picture " filter liquor major part, filter liquor main flow " etc. is meant in disclosure text not by the filter liquor of the second filter liquor gathering-device, 126 separate collections, that is all the other filter liquors that when the filter liquor that partly flows out from first pulp passage has been removed, flowed out, from pulp passage.This filter liquor is usually corresponding to transferring to filter liquor jar and no matter the filtrate flow how its source or content are all handled with a volume in the prior art systems.Filter liquor main flow 130 is usually obviously greater than the filtrate flow 128 that partly flows out from first pulp passage.The filtrate flow 128 of separate collection and the relation between the main flow 130 for example can be on the magnitudes of 1: 4 or 1: 5, but the littler and bigger difference between these two streams all is possible.
The first of pulp passage from the pulp passage of watching along the compression roller rotation direction begin extend out, that is, extend from the position that paper pulp is incorporated in the zone on the compression roller porous outer surface.The first of pulp passage can reach 40% of pulp passage 108 total lengths usually along circumferential length.In other words, the second filter liquor gathering-device 126 is arranged to accept to extend to from the position that at first touches that position of compression roller 102 clean surfaces near paper pulp the filter liquor that pulp passage 108 partly flows out along the pulp passage of the position of circumferential x% (0＜x≤40) usually.In a preferred embodiment, the length of pulp passage first can reach 30% of pulp passage total length.
For having the washing arrangement 100 that pulp passage 108 begins the paper pulp inlet 109 at place (common top at compression roller 102), it is one fan-shaped that the first of pulp passage 108 for example can cover, this is fan-shaped to correspond respectively to the x% that can reach an angle that is limited by the straight lines that intersect respectively with center of rotation and roll gap 110 and paper pulp inlet 109, wherein 0＜x≤40 (preferably being 0＜x≤30).
Fig. 5 illustrates the side view of the washing arrangement 100 of the filter liquor gathering-device that has according to the present invention example embodiment (for example, corresponding to Fig. 4).In order to illustrate, partly removed porous surface 104 (not shown hole).This illustrates the principle of the invention can realize that major trough 124 is arranged to accept the filter liquor main flow with two grooves, and secondary groove 126 is arranged to accept this filter liquor before the filter liquor that flows out from pulp passage 108 firsts falls into major trough 124.Therefore secondary groove 126 is arranged near pulp passage 108 firsts, and the filter liquor that major trough 124 is collected in pulp passage 108 remainders.
Suitably, for the compression roller 102 of filter liquor 120 places output at two ends, each compression roller 102 has a pair of secondary groove 126.Yet for example, the embodiment that all filter liquors is guided into same end 120 for example also is possible, and so, a secondary groove 126 is obviously enough.In addition, in the example of Fig. 5, major trough 124 extends and not interruption along compression roller 102 total lengths.The variant that it will be understood by those skilled in the art that two shorter grooves that are arranged in compression roller respective end place also is possible.Also have, what should point out emphatically is to use other type filter liquor collection structure to replace the embodiment of groove, boots shape tube head, baffling wall etc. also to fall within the scope of the invention.The filter liquor gathering-device for example can comprise the seal valve that is arranged in the compression roller one or both ends.Regardless of adopting which kind of filter liquor gathering-device, Zong suggestion is located filter liquor collection structure and filter liquor that sealing device is arranged in reality between the zone of output in the compression roller end usually.
In above-described washing arrangement (Figure 4 and 5), two compression rollers 102 all have porous outer surface 104 and corresponding pulp passage 108, and the second filter liquor gathering-device 126 is arranged to collect the filter liquor that the first of each passage from two pulp passage flows out.Fig. 6 illustrates a washing arrangement 100 that has a filter liquor gathering-device of another example embodiment according to the present invention.In this case, one of compression roller 102-1 has porous outer surface 104, for example, and expanded metal, and another compression roller 102-2 has continuous pore-free surface.Paper pulp is input to the pulp passage 108 relevant with porous compression roller 102-1, and is squeezed between porous and atresia roller 102-1, the 102-2 at roll gap 110 places.Being used for the device 126 of the filter liquor that separate collection flows out from the primary importance of pulp passage 108 is arranged near the end of flow roll 102-1.
Fig. 6 also illustrates such fact: needs are not identical according to two compression roller 102 sizes of washing arrangement 100 of the present invention.Though what adopt usually is onesize compression roller, also can adopt the compression roller of different-diameter and/or length.
The washing arrangement 100 of Fig. 6 also has the pulp passage 108 that length is different from Fig. 4.For example, the present invention is applicable to various pulp passage, for example extend to the compression roller top pulp passage, surround compression roller approximately less than the pulp passage of 90 degree and the pulp passage length between the two.
Fig. 7 illustrates a washing arrangement 100 that has a filter liquor gathering-device that also has another example embodiment according to the present invention.Here, paper pulp inlet 109 is arranged in the bottom of press washer 100, in the zone below the roll gap 110 that two compression rollers 102 of being joined by association form.Therefore paper pulp enters pulp passage 108 by different way, and guide surface 106 has the outward appearance that is different from previous embodiment.Yet pulp passage 108 remains along compression roller 102 rotation directions in running, also also arrives the space of roll gap 110 ground transportation paper pulp basically between porous compression roller outer surface 104 and guide surface 106.Pulp passage 108 extends to roll gap 110 from paper pulp and the clean press roll surface basically part of meeting.The device 126 of collecting the filter liquor of high fiber content is arranged to accept the filter liquor (" first " is meant the first pulp passage part of meeting with free press roll surface) that flows out from the first of pulp passage.One washing arrangement 100 that is similar to structure among Fig. 7 does not add cleaning solution usually.In other words, press master 100 can move based on dehydration and extrusion process fully.
Embodiment shown in Fig. 4-7 is the schematic diagram of simplifying.For example, the paper pulp outlet does not illustrate.For example, paper pulp can be exported from washing arrangement by means of screw-rod structure, and is as shown in Figure 1 all, but also can be other scheme.
Fig. 8 illustrates the system 1000 of the processing cellulose pulp of the example embodiment according to the present invention, and it comprises washing arrangement 100-1,100-2, vertical tube 200-1,200-2, leaches flow container 300 and a plurality of pumping installations 210,310.Wash engine 100-2 is arranged to output on the one hand by the filter liquor main flow of pipeline/pipeline 315 transportations, exports on the other hand from first's separate collection of pulp passage and the filtrate flow of being transported by pipeline/pipeline 305.Filter liquor main flow 315 turns back to wash engine 100-1 with as cleaning solution, and independently filtrate flow 305 is handled by different way.Preferably, this system 1000 is provided with a recirculator, it makes this filter liquor recirculation, its major part is directed to the processing level the preceding that can handle high fiber content in the system, the described level of handling is the preceding separated with the processing level (the wash engine 100-1 among Fig. 8) of the major part of accepting filter liquor main flow 315.In the example shown, handle level the preceding and comprise vertical tube 200-1, and recirculator is arranged to the filter liquor that the second filter liquor gathering-device is collected is transported to vertical tube 200-1 as diluent liquid.
Be directed to vertical tube 200-1 by the filter liquor of separation high-load fiber and with it, fiber just can turn back in the principal fiber stream in large quantities.In addition, the filter liquor main flow 315 that is used as cleaning solution in the example shown can have quite low fiber content.This point is favourable, because can avoid the problem stopping up and block and so in the part of the wash engine 100-1 that accepts cleaning solution.
As shown in Figure 8, the device of the filter liquor of recirculation separate collection for example can be based on being arranged in the pump 310-1 (for example, dilution pumps) that leaches in the flow container 300.In this case, this leaches flow container 300 and preferably be arranged to accept all filter liquors of collecting basically in wash engine 100-2, and is provided with the pipeline 305 that is used for by the filter liquor of second filter liquor gathering-device collection.Near the feed area of the pump 310-1 that this pipeline 305 is arranged to that its output is positioned at and leaches flow container 300, thus, described pump 310-1 mainly is recycled to predetermined processing level with the filter liquor of high fiber content.
The embodiment that the filter liquor of high fiber content is directed in the pump 310-1 that leaches flow container can easily implement.In general, existing system has had such dilution pumps, and suitable standarized component (pipeline, syndeton etc.) is arranged to the interior high-load filtrate flow of feed area of rear pump with it relatedly.Yet, even with have that the said structure that leaches flow container 300 and pump 310-1 is relevant plurality of advantages, but should be understood that other structure of the filter liquor of the high fiber content that transportation is collected also is possible.For example, system can be provided with the jar and the pump that separate of the filtrate flow that is used for " new " high fiber content.
Fig. 9 illustrate one according to the present invention the system 1000 of the processing cellulose pulp of another example embodiment.This system is provided with device 400, and it is used for reclaiming the fiber in the collected filter liquor of the second filter liquor gathering-device.The filtrate flow of pipeline/syndeton 305 directly or the flow container 300 that leaches by as shown in Figure 9 be directed to fiber recovery unit 400, after handling in reclaiming unit 400, fiber and cleaning solution are exported with the stream that separates.
Still with reference to Fig. 9, have leach flow container 300 and pump 310-1 example structure with identical in conjunction with the described structure of Fig. 8.Certainly, the structure that this system also can comprise other is transported to predetermined processing level with the filter liquor of the high-load fiber collected, such as the jar and the pump that separate of the high-load fiber filter liquor that is used for collecting dividually.
Although the present invention is described with reference to the embodiment that illustrates especially, be stressed that the present invention is also contained the equivalent of the feature that discloses and to conspicuous various variations of technical staff in the present technique field and variant.Therefore, scope of the present invention is only limited by attached claims.
Claims (13)
1. the structure (100) of the plain paper pulp of a washing the fibre comprises:
Two compression rollers (102), described two compression rollers are arranged to have porous outer surface (104) along relative direction rotation and at least one described compression roller in operating process;
Guide surface (106), described guide surface is arranged in the porous outer surface a distance from described at least one compression roller, so that along circumferentially partly surrounding described compression roller, pulp passage (108) roughly is arranged between described porous outer surface and the described guide surface, and in operating process, be fed to paper pulp in the described pulp passage along the rotation direction transportation and in place, described pulp passage end is squeezed in roll gap (110) between the described compression roller; And
Filter liquor gathering-device, described filter liquor gathering-device are arranged to collect and pass described porous outer surface and enter the interior filter liquor of described compression roller,
It is characterized in that described filter liquor gathering-device comprises again:
Be arranged to accept the filter liquor main flow the first filter liquor gathering-device (124) and
Be arranged to accept the second filter liquor gathering-device (126) of the filter liquor that flows out from the first of described pulp passage, thus, the filter liquor that is associated with the described first of described pulp passage can be handled dividually with described filter liquor main flow,
And the described first of described pulp passage (108) partly extends from the beginning of described pulp passage, and has along a circumferential length, and this length can reach 40% of described pulp passage (108) total length.
2. washing arrangement as claimed in claim 1, it is characterized in that, the filter liquor that is associated with the described first of described pulp passage (108) is the filter liquor of high fiber content, and in the described second filter liquor gathering-device (126) the processing level that this filter liquor can be directed into be applicable to high fiber content.
3. as any one described washing arrangement in claim 1 or 2, it is characterized in that, comprise the separately output device of exporting the filter liquor of being collected by the described second filter liquor gathering-device from described washing arrangement dividually, described separately output device can be connected to suitable external treatment level in order to transport.
4. as any one described washing arrangement in the above-mentioned claim, it is characterized in that, the described first of described pulp passage (108) partly extends from the beginning of described pulp passage, and has along a circumferential length, and this length can reach 30% of described pulp passage (108) total length.
5. as any one described washing arrangement in the above-mentioned claim, it is characterized in that, described at least one compression roller (102) has axial filter liquor passage (114), the filter liquor that described axial filter liquor channel arrangement becomes will pass described porous outer surface (104) is transported at least one end (120) of described compression roller, and the described second filter liquor gathering-device (126) is suitable for collecting the filter liquor that is transported to described at least one end by the subclass of described axial filter liquor passage.
6. as any one described washing arrangement in the above-mentioned claim, it is characterized in that, comprise the paper pulp inlet (109) that is arranged in the described first half place of described at least one compression roller (102) with respect to center of rotation, thus, described pulp passage (108) is along the position that circumferentially extends to from the position near described paper pulp inlet near the described roll gap (110) between the described compression roller.
7. as any one described washing arrangement in the above-mentioned claim, it is characterized in that, described two compression rollers (102) all have porous outer surface (104) and corresponding pulp passage (108), and the described second filter liquor gathering-device (126) is arranged to collect the filter liquor that each the first from described two pulp passage flows out.
8. as any one described washing arrangement in the above-mentioned claim, it is characterized in that, the described first filter liquor gathering-device (124) comprises the major trough that is arranged to accept described filter liquor main flow (130), and the described second filter liquor gathering-device (126) comprises at least one secondary groove, and described secondary groove is arranged to accept this filter liquor before the filter liquor that flows out from the first of described pulp passage falls into described major trough.
9. a system (1000) that handles cellulose pulp comprises as any one described washing arrangement (100) in the above-mentioned claim.
10. system as claimed in claim 9, it is characterized in that, comprise recirculator, described recirculator is used for the filter liquor that recirculation is collected by the described second filter liquor gathering-device (126), the major part of this filter liquor is directed to the processing level the preceding that can handle high fiber content in the described system, and described processing level the preceding is what to be separated with the described processing level of the major part of accepting described filter liquor main flow (130).
11. system as claimed in claim 10, it is characterized in that, the described level of handling the preceding comprises vertical tube (200), and described recirculator is arranged to the filter liquor that the described second filter liquor gathering-device (126) is collected is transported to vertical tube with the usefulness as diluent liquid.
12. system as claimed in claim 9 is characterized in that, comprises the described device (400) that is used for from by recycled fiber the filter liquor of the described second filter liquor gathering-device (126) collection.
13. as any one described system among the claim 9-12, it is characterized in that, also comprise and leach flow container (300), the described flow container (300) that leaches is arranged to accept all filter liquors of collecting basically in described washing arrangement (100-2), and be provided with the pipeline (305) that is used for the filter liquor of collecting by the described second filter liquor gathering-device (126), described pipe arrangement becomes to make its output to be positioned near the feed area of the described pump (310-1) that leaches flow container, thus, described pump mainly is recycled to predetermined processing level (200-1 with the filter liquor of high fiber content, 400).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0602268-5 | 2006-10-27 | ||
| SE06022685 | 2006-10-27 | ||
| SE0602268A SE530282C2 (en) | 2006-10-27 | 2006-10-27 | Washing press comprising separation of filtrate |
| PCT/SE2007/050767 WO2008051157A1 (en) | 2006-10-27 | 2007-10-23 | Press washer comprising separation of filtrates |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101529016A true CN101529016A (en) | 2009-09-09 |
| CN101529016B CN101529016B (en) | 2011-08-03 |
Family
ID=39272893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200780040006XA Expired - Fee Related CN101529016B (en) | 2006-10-27 | 2007-10-23 | Press washer comprising separation of filtrates |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2079872A4 (en) |
| CN (1) | CN101529016B (en) |
| CA (1) | CA2667242A1 (en) |
| SE (1) | SE530282C2 (en) |
| WO (1) | WO2008051157A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105189859A (en) * | 2013-05-03 | 2015-12-23 | 维美德公司 | Method and system for washing of cellulose pulp |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE0802072A2 (en) * | 2008-10-01 | 2010-07-20 | Metso Paper Inc | Washing press for washing cellulose pulp |
| SE533737C2 (en) * | 2008-10-27 | 2010-12-21 | Metso Paper Inc | Apparatus and method for improved drainage efficiency |
| SE533686C2 (en) * | 2009-04-09 | 2010-12-07 | Andritz Oy | Pressure for dewatering a suspension, and ways of cleaning it |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE380300C (en) * | 1974-03-04 | 1984-10-29 | Sunds Ab | DEVICE FOR LIQUID TREATMENT OF A FIBER SUSPENSION |
| BR5901347U (en) * | 1979-09-03 | 1981-04-07 | Voith Sa Maquinas Equip | FILTER FOR THICKENING FIBROUS MASS SUSPENSIONS |
| CA2069883A1 (en) * | 1990-02-16 | 1991-08-17 | Rune Frykhult | Apparatus for filtering liquids |
| US5046338A (en) * | 1990-06-13 | 1991-09-10 | Ingersoll-Rand Company | Multiphase pulp washer |
| FI88940C (en) * | 1991-06-17 | 1993-07-26 | Sunds Porin Tehtaat Oy | DRUMTVAETTARE |
| US5722264A (en) * | 1995-08-07 | 1998-03-03 | Beloit Technologies, Inc. | Single roll displacement wash press |
| CN2263126Y (en) * | 1996-05-21 | 1997-09-24 | 东莞市沙田东江机械制造厂 | Pulp washing machine |
| SE512753C2 (en) * | 1999-03-09 | 2000-05-08 | Kvaerner Pulping Tech | Apparatus for washing and dewatering a fiber pulp suspension. |
| CN2441845Y (en) * | 2000-09-21 | 2001-08-08 | 潍坊市轻工机械研究所 | Double roller replacable wash engine |
| CN2500704Y (en) * | 2001-09-12 | 2002-07-17 | 章丘市造纸机械辅机厂 | Double-roll displacing pressing pulp washer |
| SE525565C2 (en) * | 2003-07-01 | 2005-03-08 | Metso Paper Inc | Process and washing press for washing and dewatering a fiber suspension |
| SE528867C2 (en) * | 2005-07-04 | 2007-03-06 | Metso Paper Inc | Roll body for press roll and roll press comprising two press rolls |
-
2006
- 2006-10-27 SE SE0602268A patent/SE530282C2/en not_active IP Right Cessation
-
2007
- 2007-10-23 EP EP07835351A patent/EP2079872A4/en not_active Withdrawn
- 2007-10-23 CA CA002667242A patent/CA2667242A1/en not_active Abandoned
- 2007-10-23 CN CN200780040006XA patent/CN101529016B/en not_active Expired - Fee Related
- 2007-10-23 WO PCT/SE2007/050767 patent/WO2008051157A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105189859A (en) * | 2013-05-03 | 2015-12-23 | 维美德公司 | Method and system for washing of cellulose pulp |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101529016B (en) | 2011-08-03 |
| CA2667242A1 (en) | 2008-05-02 |
| SE0602268L (en) | 2008-04-15 |
| EP2079872A4 (en) | 2012-07-04 |
| SE530282C2 (en) | 2008-04-15 |
| WO2008051157A1 (en) | 2008-05-02 |
| EP2079872A1 (en) | 2009-07-22 |
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