CN102472005B - Arrangement and method for washing cellulose pulp - Google Patents
Arrangement and method for washing cellulose pulp Download PDFInfo
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- CN102472005B CN102472005B CN201080036054.3A CN201080036054A CN102472005B CN 102472005 B CN102472005 B CN 102472005B CN 201080036054 A CN201080036054 A CN 201080036054A CN 102472005 B CN102472005 B CN 102472005B
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- paper pulp
- piston apparatus
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- 238000005406 washing Methods 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims description 22
- 229920002678 cellulose Polymers 0.000 title abstract description 9
- 239000001913 cellulose Substances 0.000 title abstract description 9
- 210000004262 dental pulp cavity Anatomy 0.000 claims abstract description 117
- 238000006073 displacement reaction Methods 0.000 claims abstract description 30
- 229920001131 Pulp (paper) Polymers 0.000 claims description 141
- 239000007788 liquid Substances 0.000 claims description 80
- 239000000835 fiber Substances 0.000 claims description 8
- 239000000706 filtrate Substances 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 238000004900 laundering Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 206010008190 Cerebrovascular accident Diseases 0.000 description 2
- 208000006011 Stroke Diseases 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/76—Handling the filter cake in the filter for purposes other than for regenerating
- B01D29/80—Handling the filter cake in the filter for purposes other than for regenerating for drying
- B01D29/82—Handling the filter cake in the filter for purposes other than for regenerating for drying by compression
- B01D29/824—Handling the filter cake in the filter for purposes other than for regenerating for drying by compression using pistons
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/76—Handling the filter cake in the filter for purposes other than for regenerating
- B01D29/78—Handling the filter cake in the filter for purposes other than for regenerating for washing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/96—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Abstract
An arrangement (100) for washing cellulose pulp, comprising a pulp transport rotor (10) and a number of pulp chambers (12), is provided. Each pulp chamber is partly defined by a perforated surface (12a) of the rotor. The rotor is arranged to rotate stepwise so as to transfer the perforated surface of the respective pulp chambers between different pulp handling zones (Z1, Z2, Z3, Z4). The washing arrangement further comprises a piston device (20) arranged at one pulp handling zone, said piston device being arranged for piston movement (M) in a radial direction so as to, in operation and upon movement towards the pulp, increase the consistency of pulp, and means for displacement washing of the pulp with increased consistency using the piston device.
Description
Technical field
The present invention relates to the process of cellulose pulp, relate more specifically to the equipment for washing the fibre element paper pulp and method.
Background technology
Pulp washing is a key operation in chemical pulping line.There is the rinsing maching of number of different types perhaps available, comprise wash press machine, water-removing press, diffusion machine and filter.
A kind of well-known washing principle is displacement, wherein, the dirty liquid (solution) in paper pulp replace by the wash liquid that comparatively cleans.Another well-known washing principle is squeezing, and wherein, dirty liquid is pressed, and (squeezing) goes out outside paper pulp.Displacement and squeezing usually occur in same rinsing maching, such as United States Patent (USP) 3,980, the squeezing washer of the general type disclosed by 518.
Two major issues will considered about washing are detersive efficiency and capacity.Increase due to capacity causes the reduction of efficiency or vice versa, and therefore these factors will be balanced each other usually.Therefore, wish very much a kind ofly not only to provide the washing scheme improved detersive efficiency but also high power capacity is provided.
Summary of the invention
In brief, a kind of new cellulose pulp washing facility is provided.This washing facility comprises the rotor with multiple pulp chamber, and when rotor rotates in stepwise fashion, these pulp chamber shift between different pulp processing region.This washing facility is suitable for the concentration increasing paper pulp, then carries out displaced type washing.This realizes by piston apparatus, and this piston apparatus is arranged on a pulp processing region place and is arranged to radially make piston movement relative to rotor.
More particularly, provide a kind of equipment for washing the fibre element paper pulp, this equipment comprises paper pulp conveying rotor and multiple pulp chamber.Each pulp chamber by paper pulp conveying rotor perforated surface portion limit, thus when there being paper pulp in pulp chamber, allow filter liquor flow through perforated surface.Paper pulp conveying rotor is arranged to rotate step by step, thus the perforated surface of corresponding pulp chamber is transferred to the next pulp processing region in the multiple pulp processing regions in washing facility.Washing facility also comprises piston apparatus and displaced type wash mill, piston apparatus is arranged in one of pulp processing region place, described piston apparatus is arranged to radially make piston movement relative to paper pulp conveying rotor, thus be in operation also once move towards paper pulp, just increase the concentration of the paper pulp in the pulp chamber be currently located in pulp processing region, displaced type wash mill is positioned at the pulp processing region be associated with piston apparatus, carries out displaced type washing for using piston apparatus to the paper pulp increasing concentration.
Displaced type wash mill such as can be arranged to carry out displaced type washing with the pressure of 5-200kPa to increasing the paper pulp that concentration is 10-30%.
The washing facility proposed allows to carry out displaced type washing with high concentration and high pressure.Detersive efficiency is high, and washing facility is associated with sizable capacity.
Displaced type wash mill generally includes wash liquid adding set, and wash liquid is added into the pulp processing region be associated with piston apparatus by wash liquid adding set.Wash liquid such as can add from the wash liquid compartment in piston apparatus via piston apparatus (that is, from inner side), and passes through the perforation end wall of piston apparatus.This causes uniform wash liquid distribution on the whole width of pulp chamber, that is, uniform wash liquid distribution between its two side, and therefore causes efficient displaced type to wash.
Displaced type wash mill can advantageously comprise the device making piston apparatus make piston movement.So the piston movement of paper pulp causes wash liquid to be pressed into paper pulp usually in pulp chamber, replace dirty liquid at this place's wash liquid.Therefore, in a favourable embodiment, piston movement had both been used for increasing pulp density, was used for again carrying out displaced type washing.
According to an exemplary embodiment, piston apparatus is double-piston apparatus, and this double-piston apparatus comprises internal piston, and this internal piston to be arranged to inside outer piston and movable relative to outer piston.Efficient dehydration and displacement realize by following: first move whole piston apparatus, then only make internal piston press to paper pulp further.Before the wash liquid in displacement stage adds, piston is without the need to outwards falling back from paper pulp conveying rotor/retreat.Therefore, double-piston apparatus is provided for the efficient complex appts of squeezing and displacement.Another advantage of double-piston apparatus is: during displaced type washing, and slurry cake by outer piston " locking ", that is, will keep tightly, and this especially reduces the risk that air is mixed into paper pulp.
Substituting as double-piston apparatus, also can provide pulp density and the displaced type washing of increase by single piston apparatus.Use single piston apparatus advantage to be: piston self can have and quite simply designs, comparatively easily to manufacture and manufacturing cost is lower.
According to an exemplary embodiment with single piston apparatus, single piston is suitable for doing " reciprocating motion ", typically make single piston from paper pulp release after shifting to paper pulp (pulp density increase), and enter pulp chamber from the outside slow astern set a distance of rotor to allow wash liquid.Then, single piston again towards rotor motion with realize displacement.
According to another exemplary embodiment with single piston apparatus, single piston is connected to the external pressure devices of such as pump, and this external pressure devices is arranged to the paper pulp pressed through by wash liquid in pulp chamber.An advantage is: during displaced type washing, and slurry cake by single piston " locking ", that is, will keep tightly, and this especially reduces the risk that air is mixed into paper pulp.Another advantage is: pressure apparatus embodiment provides comparatively simple piston apparatus design with directly functional.
According to a further aspect in the invention, a kind of method for washing the fibre element paper pulp is provided.According to a further aspect in the invention, a kind of piston apparatus used in cellulose pulp washing facility is provided.
Accompanying drawing explanation
The present invention and further object and advantage can be understood best with reference to the following description and drawings, in the accompanying drawings:
Fig. 1 is the schematic sectional view of the washing facility according to the present invention one exemplary embodiment;
Fig. 2 A to 2G shows the different operation phase of the washing facility according to the present invention one exemplary embodiment;
Fig. 3 A to 3E shows the different operation phase of the washing facility according to another exemplary embodiment of the present invention;
Fig. 4 A to 4E shows the different operation phase of the washing facility according to another exemplary embodiment of the present invention; And
Fig. 5 is the schematic flow diagram of the method for washing the fibre element paper pulp according to the present invention one exemplary embodiment.
Detailed description of the invention
In the accompanying drawings, similar or corresponding element is indicated by identical Reference numeral.
In order to the object of this explanation, " piston movement " is by the motion of finger piston in external structure.Piston typically close but also can be perforation piston structure, at one end with the Connection Element of such as piston rod, move through this piston rod to transmit.External structure can be such as pulp chamber hereinafter described or outer piston.Piston is arranged to advance in external structure in reciprocating linear mode or slide.
Fig. 1 schematically illustrates according to an exemplary washing facility of the present invention.Washing facility 100 comprises rotational structure, is called paper pulp conveying rotor 10, and this rotational structure has four pulp chamber 12, and when washing facility 100 runs, these pulp chamber are arranged to rotate with the stride of about 90 degree.As shown in the figure, pulp chamber 12 will be arranged on the outside of paper pulp conveying rotor 10 usually.Each pulp chamber 12 has perforated surface 12a, and typically basic on the whole inwall of pulp chamber 12, at the initial position of pulp chamber, pulp layer is typically deposited on this perforated surface.When there being paper pulp in pulp chamber 12, filter liquor allows to flow through perforated surface 12a along the radially inner direction of cardinal principle.Filter liquor is typically collected by inner filtrate collection structure 16, and such as can be directed to the valve at rotor 10 one or both ends place.Two sidewall 12a that pulp chamber 12 is formed by partition member 10a further carry out boundary, and this partition member is a part for rotor 10 in the example of fig. 1.
Paper pulp conveying rotor 10 progressively rotate that R makes corresponding pulp chamber 12 in washing facility carry between each pulp processing region Z1, Z2, Z3, Z4.These regions are static, and by respective a fenced pulp chamber, that is, the current pulp chamber (when rotor does not move) be present in this region substantially, and possible pulp treating apparatus (piston apparatus, cleaning device etc. vide infra).
At Z2 place, pulp processing region, piston apparatus 20 is arranged to assist with the pulp chamber 12 be currently located in the Z2 of region join.Piston apparatus 20 is arranged to radially make piston movement M relative to paper pulp conveying rotor 10, thus at the volley and once shift to paper pulp, just increases the concentration of the paper pulp in pulp chamber 12.In shown washing facility 100, be also provided with the device for wash liquid being added into via piston apparatus 20 region Z2, the piston movement M of piston apparatus 20 provides displaced type washing.
In order to the association realized between piston apparatus 20 and pulp chamber 12 joins, piston apparatus 20 can comprise piston, and when pulp chamber is arranged in the pulp processing region Z2 be associated with piston apparatus, this piston is arranged to fit into corresponding pulp chamber.Piston apparatus 20 typically comprises the piston that width corresponds essentially to pulp chamber 12 width between two sidewall 12b.Piston apparatus 20 typically comprises press surface, and this press surface is towards the perforated surface 12a of pulp chamber 12, and the shape of this press surface and orientation correspond essentially to shape and the orientation of perforated surface 12a.In FIG, press surface is the outer surface of piston end wall 22a.Press surface is movable, and is suitable for being pressed against perforated surface 12a on along substantially radially inner direction by paper pulp relative to paper pulp conveying rotor 10, and therefore dewatering of pulp and its concentration increase.
Advantageously, piston apparatus 20 extends along the substantially whole axial length of paper pulp conveying rotor 10.Because displacement and watering area Z2 are substantially along whole rotor 10 (with pulp chamber 12), therefore washing facility can be used efficiently.
Piston apparatus can be hydraulic pressure, such as, use oil or wash liquid as hydraulic fluid, but the hydraulic fluid substituted also is fine.
Shown example piston device 20 is double-piston apparatus, and this double-piston apparatus comprises outer piston 22 and internal piston 24.Internal piston 24 is arranged within outer piston 22, and movable relative to outer piston 22.Outer piston 22 and pulp chamber 12 are assisted and are joined.Such as, outer piston 22 can be arranged to advance in pulp chamber 12, radial motion at least in part.Outer piston 22 can advantageously have the shape corresponding with pulp chamber 12 and more smaller than pulp chamber 12, thus slides in pulp chamber.On the other hand, internal piston 24 can be arranged to advance in outer piston 22, is suitable for its whole radial motion.Internal piston 24 advantageously can have the shape corresponding with inside outer piston 22 also than smaller inside this, thus forms sliding relation with outer piston.
Device for adding wash liquid via piston apparatus 20 such as can relate to the equipment for adding wash liquid from the inside wash liquid compartment in piston apparatus.In the double-piston apparatus of Fig. 1, this wash liquid compartment 26 is limited between the end wall 22a towards perforated surface 12 of the outer piston 22 and corresponding end wall 24a of internal piston 24.(in FIG, the end wall 22a of outer piston 22 is contrary with the bar of outer piston 22/axle 22b, and in FIG, the end wall 24a of internal piston 24 is contrary with the bar of internal piston 24/axle 24b.) the end wall 22a of outer piston 22 is perforation, thus allows wash liquid to enter pulp chamber 12.
Therefore, in FIG, via piston apparatus, wash liquid is added into pulp processing region Z2, that is, is added into pulp processing region Z2 from piston apparatus self, in other words, it has " built-in ", and wash liquid adds.Or wash liquid can be added into space between end wall 22a and perforated surface 12a from the pipeline washing facility or other appropriate device (outside double-piston).In this case, end wall 22a (that is, the press surface of piston apparatus) is without the need to perforation.
Those of skill in the art would recognize that Fig. 1 is the schematic diagram in order to the basic structure and principle that washing facility is described.Such as, usually will there is case (not shown), the fenced paper pulp conveying rotor 10 of this case and piston apparatus 20.In a specifically favourable embodiment, case forms controlled pressurized environment.This case comprises closed space, and it can easily control and run.
Washing facility of the present invention can be used on the many diverse locations in paper pulp pipeline.Specifically, such as it can replace traditional wash press machine to improve washing capacity and efficiency.
example: double-piston apparatus
Fig. 2 A to 2G shows the different operation phase of the washing facility according to the present invention one exemplary embodiment.In this example, corresponding pulp chamber 12 turns to the paper pulp input area Z1 of washing facility 100, displacement and watering area Z2, paper pulp step by step and removes region Z3 and rotor cleaning area Z4.Piston apparatus 20 is arranged in displacement and watering area Z2.
At paper pulp input area Z1, cellulose pulp 14 is fed to pulp chamber 12 (Fig. 2 A).The paper pulp 14 being delivered to washing facility 100 has the concentration of 3-12% suitably, preferably has the concentration of 6-12%.
After rotation stride, this pulp chamber arrives displacement and watering area Z2 (Fig. 2 B), actual laundering generation part that Here it is.First, the concentration of paper pulp 14 is increased to the concentration of 10-30% suitably by piston movement, be preferably increased to the concentration of 15-25%.In double-piston embodiment, this by make outer piston 22 relative to paper pulp conveying rotor 10 radially inward direction motion realize, see Fig. 2 C.Outer piston 22 is advanced in pulp chamber 12, and its end wall 22a presses to paper pulp 14 in pulp chamber 12.Filter liquor flows through perforated surface 12a, and is collected by inner filtrate collection structure 16 in shown example, and this inner filtrate collection structure is arranged through the one or both ends that filter liquor is delivered to paper pulp conveying rotor 10 by armature spindle.(certainly, the motion of outer piston 22 also causes the internal piston 24 be arranged within outer piston 24 to move relative to pulp chamber 12.But, there is no internal piston 24 relative to the piston movement of outer piston 22.)
See Fig. 2 D, the pulp density place increased, carries out displaced type washing to paper pulp.In double-piston embodiment, this by make internal piston 24 relative to paper pulp conveying rotor 10 radially inward direction motion realize.Internal piston 24 slides in outer piston 22, in other words, there is the piston movement of internal piston 24 relative to outer piston 22.The piston movement of internal piston 24 causes wash liquid compartment (in Fig. 2 C 26) to be compressed, and therefore wash liquid is pressed through the end wall 22a of outer piston 22 and the paper pulp 14 be pressed in pulp chamber 12.The liquid of paper pulp apoplexy involving the solid organs is replaced by the wash liquid comparatively cleaned, and filter liquor deflects from pulp chamber 12 by perforated surface 12a.
Permutations is as occurred in 5-200kPa, if pressure is 50-200kPa during the displacement stage, is then favourable.Therefore, can replace under the high concentration combined with high pressure, this is a quite significant advantage of the present invention, the scourability causing displacement efficiently and therefore improve.
As shown in Figure 2 E, by by pulp squeezing to required concentration of emission, displacement advantageously can be followed by further concentration to be increased.In exemplary double-piston embodiment, this by make outer piston 22 relative to paper pulp conveying rotor 10 radially inward direction motion realize.Along with outer piston 22 is advanced further in pulp chamber 12, its end wall 22a squeezes paper pulp 14 in pulp chamber 12, causes more liquid to flow through perforated surface 12a.
After another stride of rotation, remove region Z3 at paper pulp and remove the paper pulp 14 (Fig. 2 F) washed from pulp chamber 12.The paper pulp removed exports from washing facility 100 and is delivered to other process segment paper pulp production line.Paper pulp 14 has the concentration of emission of 10-40% suitably, preferably has the concentration of emission of 15-30%.
Arrive rotor cleaning area Z4 after another stride of rotation after, the perforated surface 12a of pulp chamber 12 is cleaned (Fig. 2 G).For this reason, static flusher 30 can be arranged in region Z4 suitably.Also other can be used for the device of clean perforated surface 12a.
In one exemplary embodiment, the Plant arrangement for clean perforated surface becomes to use the filter liquor flowing through perforated surface 12a as clean liquid, this provides efficient liquid and utilizes.Another exemplary embodiment has such as from the separately interpolation of the clean liquid of external source.But should be appreciated that, rotor is clean is optional, and can be omitted.
Substituting as double-piston apparatus, also can provide pulp density and the displaced type washing of increase by single piston apparatus.This device comprises single piston, and the end wall surface of this piston is to the perforated surface 12a of pulp chamber 12.The example of single piston apparatus embodiment is provided in Fig. 3 and 4 respectively.
example: with single piston of " back and forth " piston movement
Fig. 3 A to 3E shows the different operation phase of the present invention one exemplary embodiment using single piston apparatus.Apostrophe (') is used for indicating specific element, these elements compared with the element of preceding embodiment design and/or functionally more or less different.Pulp density (after input concentration, increase concentration, concentration of emission) between locomorphic stage and/or pressure such as can fall within the scope described in above composition graphs 2.
The example piston device 20 ' of Fig. 3 is single piston apparatus, and this single piston apparatus comprises and is arranged to assist the single piston 22 ' of joining with pulp chamber 12.Such as, piston can be arranged to advance in pulp chamber 12, radial motion at least in part.Single piston 22 ' then can advantageously have the shape corresponding with pulp chamber 12 and more smaller than pulp chamber 12, thus slides in pulp chamber.
At paper pulp input area Z1, cellulose pulp 14 is fed to pulp chamber 12 (Fig. 3 A).After rotation stride, this pulp chamber arrives displacement and watering area Z2 (Fig. 3 B), actual laundering generation part that Here it is.First, the concentration of paper pulp 14 is increased by piston movement.In this single piston embodiment, this by make single piston 22 ' relative to paper pulp conveying rotor 10 radially inward direction motion realize, see Fig. 3 C.Piston 22 ' is advanced in pulp chamber 12, and its end wall 22a ' presses to paper pulp in pulp chamber 12.Filter liquor flows through perforated surface 12a to be collected by inner filtrate collection structure 16.
See Fig. 3 D, the concentration place increased, carries out displaced type washing to paper pulp.This realizes basically by a two stage process, as the upper figure (I) of Fig. 3 D and figure below (II) respectively shown in.First, single piston 22 ' " retrogressing ", that is, relative to paper pulp conveying rotor 10 radially direction motion, therefore wash liquid is by perforation end wall 22a ' outflow (Fig. 3 D (I)).This outside piston movement discharges single piston 22 ' from paper pulp, that is, prevent from being pressed against consumingly on slurry cake, and this permission wash liquid enters the space between end wall 22a ' and perforated surface 12a.After the pulp chamber 12 like this wash liquid being provided to region Z2, single piston 22 ' shifts to the perforated surface 12a (Fig. 3 D (II)) of rotor 10.Therefore, in this single piston embodiment, replace by make single piston 22 ' relative to paper pulp conveying rotor 10 radially inward direction motion realize.Along with single piston 22 ' slides in pulp chamber 12, the dirty liquid body in paper pulp is replaced by the wash liquid comparatively cleaned, and filter liquor deflects from pulp chamber by perforated surface 12a.
As shown in the figure, wash liquid adds and can occur via single piston 22 ', and in this case, described end wall 22a ' is perforation, thus allows wash liquid to flow into pulp chamber 12 from the inside wash liquid compartment 26 ' of single piston 22 '.Or wash liquid can be added into pulp chamber outside piston, that is, be added into pulp chamber from the pipeline washing facility 100 or other appropriate device (outside single piston 22 ').Outside wash liquid is added, there is the end wall 22a ' of the single piston 22 ' of press surface without the need to perforation.
As shown in FIGURE 3 E, by by pulp squeezing to required concentration of emission, displacement advantageously can be followed by further concentration to be increased.In this single piston embodiment, this radially realizes towards paper pulp motion relative to paper pulp conveying rotor 10 by making single piston 22 '.Along with single piston 22 ' is advanced further in pulp chamber 12, its end wall 22a ' squeezes paper pulp in pulp chamber 12, causes more liquid to flow through perforated surface 12a.
Displacement and the washing of the watering area Z2 paper pulp that can advantageously be followed by described in above composition graphs 2F remove and/or rotor described in above composition graphs 2G clean.
example: with single piston of pump wash liquid feeding
Fig. 4 A to 4E shows the different operation phase of another exemplary embodiment of the present invention using single piston apparatus.Two apostrophe (") be used for indicating specific element, these elements compared with the element of preceding embodiment design and/or functionally more or less different.Pulp density (after input concentration, increase concentration, concentration of emission) and/or the scope of pressure such as can be as described above in connection with Figure 2.
The example piston device 20 of Fig. 4 " be single piston apparatus, this single piston apparatus comprise be arranged to assist the single piston 22 of joining with pulp chamber 12 ".Such as, piston can be arranged to advance in pulp chamber 12, radial motion at least in part.Single piston 22 " then can advantageously have the shape corresponding with pulp chamber 12 and more smaller than pulp chamber 12, thus slide in pulp chamber.Single piston apparatus 20 " is external pressurized, such as, carrys out external pressurized by comprising or being connected to pump 40 and so on, as shown in Figure 4.
At paper pulp input area Z1, cellulose pulp 14 is fed to pulp chamber 12 (Fig. 4 A).After rotation stride, this pulp chamber arrives displacement and watering area Z2 (Fig. 4 B), actual laundering generation part that Here it is.First, the concentration of paper pulp 14 is increased by piston movement.In this single piston embodiment, this is by making single piston 22 " relative to paper pulp conveying rotor 10 radially inward direction motion realize, see Fig. 4 C." advance in pulp chamber 12, its end wall 22a " presses to paper pulp to piston 22 in pulp chamber 12.Filter liquor flows through perforated surface 12a to be collected by inner filtrate collection structure 16.
See Fig. 4 D, the concentration place increased, carries out displaced type washing to paper pulp.In this single piston embodiment, this is by realizing by wash liquid pump 40 and so on.Pump is arranged to be pumped across by wash liquid when being activated single piston 22 " perforation end wall 22a ", is also pumped across the paper pulp in pulp chamber 12.The liquid of paper pulp apoplexy involving the solid organs is replaced by the wash liquid comparatively cleaned, and filter liquor deflects from pulp chamber by perforated surface 12a.Can have following embodiment: also when pump 40 is activated, single piston 22 " can relative to paper pulp conveying rotor 10 radially inward direction motion or slip in pulp chamber 12.
In order to realize the distribution of efficient wash liquid and displaced type washing, the wash liquid interpolation carried out with pump 40 " occurs; the end wall 22a of this single piston " preferably via single piston 22 to be then perforation, thus allows wash liquid to flow into pulp chamber 12 from single piston 22 " interior wash liquid compartment 26 ".
As shown in Figure 4 E, by by pulp squeezing to required concentration of emission, displacement advantageously can be followed by further concentration to be increased.In this single piston embodiment, this is by making single piston 22 " relative to paper pulp conveying rotor 10 radially inward direction motion realize." advance in pulp chamber 12 further, its end wall 22a along with single piston 22 and " in pulp chamber 12, squeeze paper pulp, cause more liquid to flow through perforated surface 12a.
Displacement and the washing of the watering area Z2 paper pulp that can advantageously be followed by described in above composition graphs 2F remove and/or rotor described in above composition graphs 2G clean.
Fig. 5 be according to an exemplary embodiment of the present invention for the above-mentioned type with the washing facility of rotor and pulp chamber in the schematic flow diagram of method of washing the fibre element paper pulp.Rotate paper pulp conveying rotor step by step or off and on, make the perforated surface of corresponding pulp chamber move (step S1) between different pulp processing regions.In step s 2, cellulose pulp is fed to one of pulp chamber.After this, the squeezing advantageously caused because piston radially moves relative to paper pulp conveying rotor and displacement, concentration increases and is followed by displacement.More particularly, first, in step s3, be arranged in the piston apparatus at the pulp processing region place in described pulp processing region towards in paper pulp radial motion process, the concentration of paper pulp increases.This usually infers and squeezes paper pulp with piston apparatus.The concentration of paper pulp typically increases more than one % unit, but also can increase far more than this according to application.After this, in step s 4 which, use piston apparatus that the displaced type washing carried out the paper pulp with increase concentration occurs.Displacement is implemented by piston apparatus usually.Step S4 such as can comprise via piston apparatus interpolation wash liquid, that is, add wash liquid from inner side.Or, wash liquid can be provided in outside, that is, provide wash liquid from outside.Finally, the concentration (step S5) of paper pulp is increased further by piston apparatus being shifted to paper pulp.This is usually directed to squeeze paper pulp further with piston apparatus, thus the concentration of emission needed for obtaining.Step S5 is optional, as illustrated with the dotted box.In step s 6, paper pulp is removed from pulp chamber.
As mentioned above, step S2, step S3, S4, S5, step S6 can advantageously carry out in the different pulp processing regions of washing facility respectively, in this case, will before step S3 and before step S6 repeated rotation step.And one skilled in the art will recognize that, displacement step and follow-up squeezing can not always be isolated from each other really.This means that displacement step S4 can comprise the squeezing of a tittle and/or follow-up squeezing S5 can comprise some displacements.
In the exemplary embodiment using double-piston apparatus, mobile piston device 20 the step S3, the S5 that increase pulp density relate to outer piston 22 are shifted to paper pulp, and the step S4 of displaced type washing relates to internal piston 24 is shifted to paper pulp.
In the exemplary embodiment using single piston apparatus, mobile piston device 20 ' the step S3, the S5 that increase pulp density relate to single piston 22 ' are shifted to paper pulp 14, the step S4 of displaced type washing relates to makes single piston 22 ' retreat to make wash liquid enter pulp chamber 12, after this single piston 22 ' is shifted to paper pulp again.
In another exemplary embodiment using single piston apparatus, mobile piston device 20 " and the step S3, the S5 that increase pulp density relate to single piston 22 " shifts to paper pulp 14, displaced type washing step S4 relate to start such as pump 40 external pressure devices wash liquid to be pressed through the paper pulp 14 in pulp chamber 12.
Should be appreciated that, the quantity of pulp chamber and/or the quantity in pulp processing region can be changed within the scope of the invention.Therefore, pulp chamber and/or the pulp processing region of less than four and more than four can be used.But, it is suitable that, there are at least four pulp chamber thus obtain the washing facility of efficient and smooth and easy operation.The quantity in pulp processing region advantageously can correspond to the quantity of pulp chamber.
Also can there is following embodiment: washing facility comprises two (or more) piston apparatus, and each piston apparatus is arranged in the pulp processing region of respective associated.
In addition, one skilled in the art will recognize that, the present invention is not limited to rotation direction shown in the drawings and orientation.Washing facility embodiment with the paper pulp conveying rotor being arranged to rotate counterclockwise also is fine certainly.Equally, these embodiments are adjusted to paper pulp input area Z1 not at top.Washing facility is typically pressurized, and can to have for vertically-oriented washing facility be suitable application.
Also can use according to piston apparatus of the present invention on the displaced type rinsing maching with separation rotating cylinder.Piston apparatus such as can be used as upgrade feature and is arranged on existing multistage drum washing machine or filter.Rotating cylinder then will be suitable for progressively rotating, and this intermittent movement will be synchronous with piston movement.Or piston apparatus can be arranged to advance together with the rotating cylinder as a pivoting part part, and in this case, rotating cylinder rotates serially, but piston apparatus needs to be arranged to not only to rotate but also relative to rotating cylinder radial motion.
Although describe the present invention with reference to the embodiment illustrated especially; but be stressed that; it also covers equivalent and apparent amendment and the modification for a person skilled in the art of disclosed feature, and protection scope of the present invention is only limited by appended claims.
Claims (25)
1. the equipment (100) for washing the fibre element paper pulp, described equipment comprises paper pulp conveying rotor (10) and multiple pulp chamber (12), each pulp chamber is partly limited by the perforated surface (12a) of described paper pulp conveying rotor, thus when there being paper pulp in described pulp chamber, filter liquor is allowed to flow through described perforated surface
Described paper pulp conveying rotor is arranged to rotate step by step, thus the perforated surface of corresponding pulp chamber is transferred to the next pulp processing region in the multiple pulp processing regions (Z1, Z2, Z3, Z4) in described washing facility, and
Described washing facility also comprises:
Piston apparatus (20; 20 '; 20 "); described piston apparatus is arranged in one of described pulp processing region (Z2) place; described piston apparatus is arranged to radially make piston movement (M) relative to described paper pulp conveying rotor; thus be in operation also once move towards paper pulp; just increase the concentration of the paper pulp in the described pulp chamber be currently located in described pulp processing region, and
Displaced type wash mill, described displaced type wash mill is positioned at pulp processing region (Z2) place be associated with described piston apparatus, carries out displaced type washing for using described piston apparatus to the paper pulp increasing concentration.
2. equipment as claimed in claim 1, it is characterized in that, described displaced type wash mill is suitable for carrying out displaced type washing with the pressure of 5-200kPa to the paper pulp that concentration is 10-30%.
3. equipment as claimed in claim 1 or 2, it is characterized in that, described displaced type wash mill comprises again wash liquid adding set, and described wash liquid adding set is via described piston apparatus (20; 20 '; 20 ") wash liquid is added into the described pulp chamber (12) in the pulp processing region (Z2) being currently located at and being associated with described piston apparatus.
4. equipment as claimed in claim 1, it is characterized in that, described displaced type wash mill comprises for making described piston apparatus (20; 20 '; 20 " device of piston movement (M)) is made.
5. equipment as claimed in claim 1, it is characterized in that, described piston apparatus (20) is the double-piston apparatus comprising outer piston (22) and internal piston (24), described internal piston is arranged in inside described outer piston, and movable relative to described outer piston.
6. equipment as claimed in claim 5, it is characterized in that, described piston apparatus (20) comprises wash liquid compartment (26), described wash liquid compartment is limited between the end wall towards described perforated surface (12a) (22a) of described outer piston (22) and the corresponding end wall (24a) of described internal piston (24), and the end wall (22a) of described outer piston (22) is perforation thus allows wash liquid to enter described pulp chamber (12).
7. equipment as claimed in claim 1, is characterized in that, described piston apparatus (20 '; 20 " be) comprise single piston (22 '; 22 " single piston apparatus), described single piston have towards described perforated surface (12a) end wall (22a '; 22a ").
8. equipment as claimed in claim 7, it is characterized in that, (22 ") are connected to external pressure devices (40) to described single piston, and described external pressure devices is arranged to wash liquid be pressed through the paper pulp in described pulp chamber (12).
9. equipment as claimed in claim 7 or 8, is characterized in that, described single piston (22 '; 22 " wash liquid compartment (26 ') is comprised; 26 "), described end wall (22a '; 22a ") is perforation thus allows wash liquid to enter described pulp chamber (12) from described wash liquid compartment.
10. equipment as claimed in claim 1, is characterized in that, described paper pulp conveying rotor (10) and described piston apparatus (20; 20 '; 20 ") come fenced by case, described case forms controlled pressurized environment.
11. equipment as claimed in claim 1, it is characterized in that, comprise the device (30) for described perforated surface (12a) clean after paper pulp removal, described device (30) is arranged to use and flows through the filter liquor of described perforated surface (12a) as clean liquid.
12. equipment as claimed in claim 1, is characterized in that, comprise at least four pulp chamber (12).
13. equipment as claimed in claim 12, is characterized in that, described equipment comprises four pulp chamber (12), and are arranged to rotate with the stride of 90 degree.
14. equipment as claimed in claim 13, it is characterized in that, described pulp processing region (Z1, Z2, Z3, Z4) at least paper pulp input area (Z1), displacement and watering area (Z2) and paper pulp removal region (Z3) is comprised, described piston apparatus (20; 20 '; 20 " described displacement and watering area (Z2)) is arranged in.
15. 1 kinds of methods for washing the fibre element paper pulp in washing facility (100), described equipment comprises paper pulp conveying rotor (10) and multiple pulp chamber (12), each pulp chamber is partly limited by the perforated surface (12a) of described paper pulp conveying rotor, thus when there being paper pulp in described pulp chamber, allow filter liquor to flow through described perforated surface, said method comprising the steps of:
Rotate described paper pulp conveying rotor step by step, make to move between the different pulp processing regions (Z1, Z2, Z3, Z4) of the perforated surface of corresponding pulp chamber in described washing facility;
Paper pulp (14) is fed to one of described pulp chamber;
Make the piston apparatus (20 being arranged in one of described pulp processing region place; 20 '; 20 ") radially move towards paper pulp relative to described paper pulp conveying rotor, increase the concentration of paper pulp thus;
Described piston apparatus is used to carry out displaced type washing to the paper pulp increasing concentration; And
The paper pulp washed is removed from described pulp chamber.
16. methods as claimed in claim 15, is characterized in that, make piston apparatus (20; 20 '; The step of 20 ") moving relate to displaced type washing before pulp density is increased to 10-30%.
17. methods as described in claim 15 or 16, is characterized in that, the step of displaced type washing is carried out under the pressure of 5-200kPa.
18. methods as claimed in claim 15, is characterized in that, comprise following additional step:
After displaced type washing, make described piston apparatus (20; 20 '; 20 ") radially move further towards paper pulp (14) relative to described paper pulp conveying rotor (10), increase the concentration of paper pulp thus further.
19. methods as claimed in claim 15, it is characterized in that, described piston apparatus is the double-piston apparatus (20) comprising outer piston (22) and internal piston (24), described internal piston is arranged in inside described outer piston, and movable relative to described outer piston, and
The step that piston apparatus (20) is moved increases the concentration of paper pulp thus relates to makes described outer piston (22) towards paper pulp (14) motion, and
The step of displaced type washing relates to makes described internal piston (24) move towards paper pulp.
20. methods as claimed in claim 19, it is characterized in that, the step of displaced type washing comprises adds wash liquid from the wash liquid compartment (26) described piston apparatus (20), and wash liquid flows through the perforation end wall (22a) of described external compartment (22) and flow to described pulp chamber (12) thus.
21. methods as claimed in claim 15, it is characterized in that, described piston apparatus is the single piston apparatus (20 ') comprising single piston (22 '), and described single piston has the end wall (22a ') towards described perforated surface (12a), and
The step that piston apparatus (20) is moved increases the concentration of paper pulp thus relates to makes described single piston (22 ') towards paper pulp (14) motion, and
The step of displaced type washing relates to makes described single piston (22 ') retreat to make wash liquid enter described pulp chamber (12), after this makes described single piston (22 ') again move towards paper pulp.
22. methods as claimed in claim 15, it is characterized in that, described piston apparatus is the single piston apparatus (20 ") comprising single piston (22 "), described single piston have towards described perforated surface (12a) end wall (22a "), and
The step that piston apparatus (20) is moved increases the concentration of paper pulp thus relate to make described single piston (22 ") towards paper pulp (14) motion, and
The step of displaced type washing relates to startup external pressure devices (40) wash liquid to be pressed through the paper pulp in described pulp chamber.
23. methods as described in claim 21 or 22, is characterized in that, the step of displaced type washing comprises from described piston apparatus (20 '; 20 " the wash liquid compartment (26 '); 26 ") add wash liquid, wash liquid flows through described single compartment (22 ' thus; Perforation end wall 22 ") (22a '; 22a ") and flow to described pulp chamber (12).
24. methods as claimed in claim 15, is characterized in that, further comprising the steps of: after the removal step, use the filter liquor from described washing facility (100) to carry out clean described perforated surface (12a).
25. methods as claimed in claim 15, it is characterized in that, rotate step and relate to the paper pulp input area (Z1) turned to step by step to the corresponding pulp chamber of major general (12) in described washing facility (100), displacement and watering area (Z2) and paper pulp removal region (Z3), described piston apparatus (20; 20 '; 20 " described displacement and watering area (Z2) place) is arranged in.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0901115-6 | 2009-08-25 | ||
| SE0901115A SE534149C2 (en) | 2009-08-25 | 2009-08-25 | Arrangement, method and piston device for washing cellulose pulp at a pulp conveyor rotor |
| PCT/SE2010/050907 WO2011025446A1 (en) | 2009-08-25 | 2010-08-23 | Arrangement and method for washing cellulose pulp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102472005A CN102472005A (en) | 2012-05-23 |
| CN102472005B true CN102472005B (en) | 2015-05-20 |
Family
ID=43628255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080036054.3A Expired - Fee Related CN102472005B (en) | 2009-08-25 | 2010-08-23 | Arrangement and method for washing cellulose pulp |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2470715A1 (en) |
| CN (1) | CN102472005B (en) |
| SE (1) | SE534149C2 (en) |
| WO (1) | WO2011025446A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103721468A (en) * | 2013-12-12 | 2014-04-16 | 浙江华益机械有限公司 | Disassembling-and-cleaning free filter |
| CN109403119B (en) * | 2018-12-29 | 2020-12-15 | 重庆三好纸业有限公司 | Bamboo pulp washing and deslagging equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4986881A (en) * | 1989-06-28 | 1991-01-22 | Kamyr, Inc. | Method and apparatus for liquid treatment of and liquid extraction on a paper pulp |
| CN101092800A (en) * | 2007-07-30 | 2007-12-26 | 北京亿同多欧纸业投资有限公司 | Installation for displacement washing and concentrating paper making pulp |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6040558B2 (en) * | 1981-06-15 | 1985-09-11 | 日立造船株式会社 | pulp cleaning equipment |
| FI91714C (en) * | 1992-11-05 | 1994-08-10 | Paroc Oy Ab | A method and apparatus for separating a solid from a liquid |
| CN1206452A (en) * | 1995-12-29 | 1999-01-27 | 卡瓦纳碎浆处理公司 | Hydraulic unit |
-
2009
- 2009-08-25 SE SE0901115A patent/SE534149C2/en not_active IP Right Cessation
-
2010
- 2010-08-23 WO PCT/SE2010/050907 patent/WO2011025446A1/en active Application Filing
- 2010-08-23 CN CN201080036054.3A patent/CN102472005B/en not_active Expired - Fee Related
- 2010-08-23 EP EP10812405A patent/EP2470715A1/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4986881A (en) * | 1989-06-28 | 1991-01-22 | Kamyr, Inc. | Method and apparatus for liquid treatment of and liquid extraction on a paper pulp |
| CN101092800A (en) * | 2007-07-30 | 2007-12-26 | 北京亿同多欧纸业投资有限公司 | Installation for displacement washing and concentrating paper making pulp |
Also Published As
| Publication number | Publication date |
|---|---|
| SE534149C2 (en) | 2011-05-10 |
| EP2470715A1 (en) | 2012-07-04 |
| WO2011025446A1 (en) | 2011-03-03 |
| CN102472005A (en) | 2012-05-23 |
| SE0901115A1 (en) | 2011-02-26 |
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Address after: Espoo Finland Applicant after: Veimeide Technology Co., Ltd. Address before: Helsinki Applicant before: Metso Paper Inc. |
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