• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    l0 17 ABSTRACT A refiner segment (1) for a refiner intended for defibrating lignocellulose-containing material, which refiner segment has a refining surface and isarrangeable to form a part of a refining surface of said refiner, said refinersegment (1) having an inlet zone (1) directed in the direction of the feed flow ofa material to be refined and a refining zone (2) directed in the direction of thematerial flow of the refined material. The refining surface of the segmentincludes a group of at least two first bars (10) and at least three second bars(20), each first and second bar (20) having a first end (10-1, 20-1) directed inthe direction of the inlet zone (2) and a second end (10-2, 20-2) directed in thedirection of the refining zone, and the first bars (10) and the second (20) barsare arranged in an interlaced manner in which the second ends (10-2) of thefirst bars (10) are interlaced with the first ends (20-1) of the second bars (20-1) to form first grooves (BO-l) between the first bars (10) corresponding to theat least the width of the second bars (20), and to form second grooves (30-2)between the second bars (20) corresponding to at least the width of the firstbars (10). Further, the second ends (10-2) of first bars (10) has a respectiveguiding surface (Rl) decreasing from an upper surface of the first bar in thedirection of the refining zone to the second end (10-2), and the first end (20-1)of the second bars (20) has a respective guiding surface (R2) increasing fromthe direction of the inlet zone (2) to an upper surface of the bar (20) towardsthe second end (20-2). Finally, the second ends (10-2) of the first bars (10) andthe first ends (20-1) of the second bars (20) are arranged to form anequalization groove (40) substantially across and perpendicular to the firstand second bars (10, 20), wherein said equalization groove (40) is configuredto buffer and distribute a flow of material from at least one of the first grooves(30-1) between the at least two first bars (10) into one or more of the second grooves (30-2) formed between the at least three second bars (20). (Figs)
    公开号:SE1450243A1
    申请号:SE1450243
    申请日:2014-03-05
    公开日:2015-09-06
    发明作者:Thommy Lindblom
    申请人:Valmet Oy；
    IPC主号:
    专利说明:

    lOMETHOD AND ARRANGEMENT FOR FIBER FLOWEQUALIZATION IN A REFINERTECHNICAL FIELDThe present invention relates to fiber refiners in general, and specifically topromoting equalization of fiber flow in such refiners.
    BAcKGRoUNDRefiners used for manufacturing mechanical pulp typically comprise one ormore refíner elements positioned oppositely and rotating relative to each other.The fixed i.e. stationary refíner element is called the stator of the refíner, andthe rotating or rotatable refíner element is called the rotor of the refíner. Indisc refiners, the refíner elements are disc-like and in cone refiners the refínerelements are conical. In addition to disc refiners and cone refiners, there arealso what are called disc-cone refiners Where disc-like refíner elements comefirst in the flow direction of the material to be defibrated and after them thematerial to be defibrated is refined further between conical refíner elements.Furthermore, there are also cylindrícal refiners Where both the stator and therotor of the refíner are cylindrical' refíner elements.
    The refining surfaces of the refíner elements are formed by bars, i.e. bars andblade grooves i.e. grooves between the bars. The task of the bars is to defibratethe lignocellulosic material and the task of the grooves is to transport bothmaterial to be defibrated and material already defibrated on the refiningsurface. In disc refiners, which represent the most common refíner type, thematerial to be refined is usually fed through an opening in the middle of thestator i.e. on the inner periphery of the refining surface of the stator, to thespace between the refíner surfaces of the discs i.e. to a blade gap. The refinedmaterial is discharged from the blade gap, from the outer periphery of therefiníng surfaces of the refíner discs, to be fed onwards in the pulpmanufacturing process. The refining surfaces of the refíner discs may be either|_iC)surfaces formed directly on the refiner discs, or they may be formed asseparate blade segments positioned adjacent to each other in such a way thateach blade segment forms part of a continuous refining surface. The same istrue for cone refiners as Well.
    Usually, dams connecting two adjacent bars to each other are positioned atthe bottom of the blade grooves of the refining surfaces of both the stator andthe rotor of the refiner. The task of the dams is to guide the material to berefined and material already refined to the space between the bars of oppositerefining surfaces to be further refined. Since tne dams guide the material tobe refined to the space between opposite blade bars, refining the material canbe promoted thanks to the dams. Simultaneously, however, the dams causethe steam flow taking the material to be refined onwards in the blade groovesto decrease and prevent passage of the material to be refined and the materialalready refined on the refining surface by restricting the cross-sectional flowarea of the blade grooves. This in turn leads to blockage on the refiningsurface, which then results in a decrease in the production capacity of therefiner, non-uniformity of the quality of the refined material and an increasein the energy consumed for the refining.
    In any continuous process, rninímizing variations is crucial for maximízingquality, minimizing costs and getting a stable process. This is also true forany pulp refining process in Which fiber (wood or other lignocellulosicmaterial.) is refined between refiner segments. The term lignocellulose refersto plant dry matter or so called lignocellulosic biomass. It is composed ofcarbohydrate polymers (e.g. cellulose, hemicellulose), and an aromaticpolymer (lignin). These carbohydrate polymers contain different sugarmonomers (six and five carbon sugars) and they are tightly bound to lignin.Lignocellulosic biomass can be broadly classified into virgin biomass, wastebiomass and energy crops. Virgin biomass includes all naturally occurringterrestrial plants such as trees, bushes and grass. Waste biomass isproduced as a low value byproduct of various industrial sectors such aslOagricultural (corn stover, sugarcane bagasse, straw etc), forestry (saw milland paper mill discards). Energy crops are crops with high yield oflignocellulosic biomass produced to serve as a raw material for production ofsecond generation biofuel examples include switch grass (Panicum virgatum)and Elephant grass.
    Within pulp refiníng, Variations in feed within the refiníng gap between thestator and rotor segments causes an increase in energy needed to maintain apredetermined or desired pulp quality and causes Variations in end fiberquality. Therefore, there is a need for improving the design of the bladesegments in order to overcome the above mentioned disadvantages.
    SUMMARYThe present invention relates to pulp refiníng in general, and specifically tominimizing feed Variations in pulp refiners.
    In a first aspect, the present disclosure presents a blade segment for a refinerintended for defibrating lignocellulose-containing material, which bladesegment has a refiníng surface and is arrangeable to form a part of a refiníngsurface of the refiner. The blade segment has a feed edge directed in thedirection of the feed flow of a material to be refined and a discharge edgedirected in the direction of the discharge flow of the refined material, and therefiníng surface of the blade segment. Further, the refiner segment includes agroup of at least two first blade bars and at least three second blade bars, eachat least first and each of the at least three second blade bars has a first enddirected in the direction of the feed edge and a second end directed in thedirection of the discharge edge. In addition, the at least two first blade barsand the at least three second blade bars are arranged in an interlaced mannersuch that the second ends of the first blade bars are interlaced with the firstends of the second blade bars to form first valleys between said first blade barscorresponding to the width of the second blade bars, and to form secondvalleys between said second blade bars corresponding to the width of the firstblade bars. Also, the second end of the at least two first blade bars has arespective guiding surface descending from an upper surface of the at leastone first blade bar in the direction of the discharge edge to the second end,and the first end of the at least three second blade bars has a respectiveguiding surface ascending from the direction of the feed edge to an uppersurface of said blade bar towards the second end. Finally, the second ends ofthe first blade bars and the first ends of the second blade bars are arrangedto form an equalization groove substantially across and perpendicular to thefirst and second blade bars, Wherein the equalization groove is configured toP+buffer and distribute a flow of rnat^rial from a first valley between the at leastwo first blade bars into one or more second valleys formed between the atleast three second blade bars.
    Advantages of the present disclosure enable equalization of the flow of materialover a refiner segment.
    BRIEF DESCRIPTION OF THE DRAWINGSThe invention, together With further objects and advantages thereof, may bestbe understood by referring to the following description taken together with theaccompanying drawings, in which:Fig. 1 is a diagram illustrating feed Variations over time in a refinerarrangement;Fig. 2 is a schematic illustration on the distribution of material over arefiner surface in prior art;Fig. 3 is a side view of a refiner arrangement in which the currentdisclosure can be implemented;Fig. 4 is a front view of a stator/ rotor with refiner segments accordingto the current disclosure;Fig. 5 illustrates an embodiment of a refiner segment according to thepresent disclosure;Fíg. 6 illustrates a top view of part of an embodírnent of a refiner segmentaccording to the present dísclosure;Fig. 7 illustrates a side view of the ernbodírnent of Fíg. 6;Fig. 8 illustrates a top view of part of a further ernbodírnent of a refínersegment according to the present dísclosure;Fíg. 9 illustrates a side view of the ernbodiment of Fíg. 8.
    Figs. 10-16 illustrate various ernbodiments of the current disclosureDETAILED DESCRIPTIONThe present disclosure relates to refiners in general, and specifically to animproved refiner segment bar design in Which an equalization groove ismanufactured across the bars in the segment, Whereby the flovv of material inthe grooves between the bars is equalized.
    In order to further the understanding of the benefits of the present disclosure,an in depth description of the disadvantages of current prior art Will followbelow.
    In most refiner arrangements, feed Variations occur across the refinergeometry. These vary over time, over the refiner geometry (over the ring). Inorder to avoid shives in the less fiber populated zones, the gap between thestator and rotor segments is typically adjusted inwards e.g. reduced, Whichcauses higher energy consumption and production of fines (dust) in the morefiber populated zones. This causes higher energy consumption and reducedfiber quality. Shives comprises small bundles of incompletely cooked Woodfibers in the chemical pulp used in papermaking. They are smaller than knotsand are more difficult to separate from the pulp. An excess of shives is a signof poor impregnation of the Wood chips. Shives are separated from the pulp inthe screening and can be added back after refining. Even though shives aredarker than rest of the pulp, they may pass unnoticed to the paper machinebecause they are easily bleached. Shives in the paper machine can cause webbreakage or other operational problems. They might also end as spots in thefinished product.
    In the graphs of Figure 1, the effect of reducing the feed Variations over timeis illustrated. In the top most graph the feed Variations (at a set nominal feed)for a typical refiner geometry is plotted as a function of time. As indicated bythe horizontal line, a certain minimum energy level or input is necessary inorder to compensate for the feed Variations in order to maintain a certainquality of the refined pulp. By providing some means of reducing the Variationsin the feed Variations as a function of time, the minimum energy level at apredetermined quality is reduced, as illustrated in the middle graph. Finally,in the bottom graph the feed Variations over time after the Variations havebeen reduced is illustrated. It is evident that any method or arrangementWhich reduces the Variations in feed Variations over time will provide a reducedenergy level or input Whilst maintaining a certain quality.
    In Figure 2, the variation of shives and dust over a refiner surface or zone isillustrated.
    For further clarification and illustration a schematic refiner segment isillustrated in Figure 3. This illustrates a refiner comprising a coaxiallyarranged stator/ rotor disc pair. At least one of the discs is provided with arefiner surface comprising a plurality of refiner segments 1, as illustrated inFigure 4. The stator/ rotor disc pair can comprise one stator and one rotor, ortwo rotors. Further, in the current disclosure the main emphasis is on discrefiners, but the disclosure can be equally implemented in other refinergeometries as well. It should be noted, that in case of the rotor/rotorarrangement the two rotors are configured with opposing rotational directions.
    Accordingly, the inventors have identified the need for a solution that enablesdistributing the flow of the pulp across the refiner gap / zone to more efficientlyutilize all the bars of the segments 1. Therefore a fiber flow equalization unitis provided on the segments l, which distributes the flow evenly over eachfollowing groove and over time. According to a particular embodiment, theequalizer comprises an equalization groove 40 which allows the flow to choosea following groove that is not full with fibers without losing too much speed.In the equalization groove 40 the open volume initially decreases andsubsequently Suddenly increases which provides a buffer and then anexplosion which helps to equalize the flow over time. The term explosion refersto the combination of fiber and steam (in essence all the material betweenopposing segments) that explodes due to the pressure and volume change.)__iC)Part of the fiber can be defibrated by this explosion but the greater effect isthe distribution of the fiber into a subsequent groove is homogenized.
    The equalization groove 40 according to the present disclosure is providedacross the substantially radially arranged grooves and bars. In essence, theequalizer compríses two features, namely a flow reducing section and areservoir and distribution section. The flow reducing section comprísesgrooves that are designed to be more narrow, or fewer than the majority of theprovided refiner grooves on the segment. Thereby creating a flow differentialacross the refiner surface. The reservoir and distribution section comprísesthe equalization groove, which enables stemming the flow of pulp anddistributing the flow evenly across the available refiner grooves. This is a formof Water filling principle, where the reservoir distributes the flow to the groovesthat have less fiber than neighboring grooves.
    According to a particular embodiment, the equalization groove 40 is a singlegroove per segment, but it is equally possible to design the groove as a seriesof grooves arranged across the segment. However, typically there is no benefitin providing more than one equalization groove when the fiber is moving froman inlet e.g. inlet zone 2 towards an outlet edge e.g. refining zone 3 of thesegment 1.
    With reference to Figure 5, a basic embodiment of a refiner segment 1according to the current disclosure is illustrated. The refiner segment 1 isbeneficially implemented in a refiner intended for defibrating lignocellulose-containing material e.g. wood chips or other lignocellulosic material. Therefiner segment 1 has a refining surface arranged between an inlet zone 2 anda refining zone 3 and is arrangeable to form a part of the refining surface ofthe refiner. In order to do so the refiner segment 1 has an inlet zone 2 directedin the direction of the feed flow of a material to be refined and a refining zone3 directed in the direction of the material flow of the refined material. Therefining surface of the refiner segment 1 includes a group of at least two firstbars 10 and at least three second bars 20, each at least first and each at leastthree second bars 20 has a first end 10-1, 20-1 directed in the direction of theinlet zone 2 and a second end 10-2, 20-2 directed in the direction of therefining zone 3. Thereby, material that enters the refining zone 3 from the inletzone 2 will first pass over and between the first bars 10 and subsequently passthe second bars 20.
    The at least two first bars 10 and the at least three second 20 bars arearranged in an interlaced manner in which the second ends 10-2 of the firstbars 10 are interlaced with the first ends 20-1 of the second bars 20-1 to formfirst grooves 30-1 between the first bars 10 corresponding to at least the widthof the second bars 20, and to form second grooves 30-2 between the secondbars 20 corresponding to at least the width of the first bars 10. The secondend 10-2 of the at least two first bars 10 has a respective guiding surface R1or chamfer decreasing from an upper surface of the at least one first bar inthe direction of the refining zone 3 to the second end 10-2. In a correspondingmanner, the first end 20- 1 of the at least three second bars 20 has a respectiveguiding surface R2 or chamfer increasing from the direction of the inlet zone2 to an upper surface of the bar 20 towards the second end 20-2. In thisembodiment the second ends 10-2 of the first bars 10 and the first ends 20-1of the second bars 20 are arranged to form an equalization groove 40substantially across and perpendicular to the first and second bars 10, 20,such that the equalization groove 40 is configured to buffer and distribute aflow of material from at least one of the first grooves 30-1 between the at leasttwo first bars 10 into one or more of the second grooves 30-2 formed betweenthe at least three second bars 20.
    In the embodiment in Figure 5, the groups of bars 10, 20 are illustrated asforming more or less isolated structures on the surface of the segment 1.However, it is understood that the second ends 20-2 of the second bars 20can be configured to extend to the outer edge or refining zone 3 of the segmenti_1C:1 and that the first ends 10-1 of the first bars 10 can be configured to extendnear to the inner edge or inlet zone 2 of the segment 1.
    According to a particular embodiment, with reference to Figure 6 and Figure7, the second ends 10-2 of the first bars 10 and the first ends 20-1 of thesecond bars 20 are arranged such that the ends are aligned along a same lineC to form a v-shaped equalization groove 40 which has the same depth as therespective heights of the first and second bars 10, 20. Thereby, the term“interlaced” includes the situation where there is no overlap between the firstand second bars 10, 20. In the side view of Figure 7, the respective ramps orguiding surfaces Rl, R2 are configured such that the equalization groove 40,When viewed in a direction perpendicular to a lengthwise direction of the firstand second bars 10, 20 and a normal direction to the refiner segment 1, isformed by inclined opposing surfaces formed by the first guiding surfaces Rland said second R2 guiding surfaces. Depending on the configuration of theguiding surfaces Rl, R2 and the respective first and second bars 10, 20, thecross sectional shape of the equalization groove may vary. Generally, adistance between the inclined opposing surfaces of the guiding surfacesincreases along a normal direction to the refining segment. The increase canbe linear or polynomial, or have some other form. For the case of linear andequal guiding surfaces, the equalization groove 40 will take a V-shape.
    It should be noted that the first ends 10-1 of the first bars 10 and the secondends 20-2 of the second bars 2 can be configured in accordance With thedisclosed illustrations e.g. Fig. 7, Fig. 9, or can be configured with acorresponding or similar guiding surface or chamfer or other shape as therespective second ends 10-2 of the first bars 10 and the first ends 20-1 of thesecond bars.
    According to a particular embodiment the respective guiding surfaces R1 andR2 have the same inclination, but it is equally possible to have differinginclinations.'ïlC:11In a corresponding manner the height and width of the first and second bars10, 20 can differ, thereby affecting the shape of the equalization groove 40.
    For the embodiment illustrated in Figure 6, the equalization groove 40 has adepth equal to a depth of the first 30-1 and/ or second 30-2 valleys.
    With reference to Figure 8 and Figure 9, a further embodiment of a refinersegment 1 Will be described. In this case, the first 10 and second 20 bars arearranged in an interlaced manner such that the bars of the two g“oups areclearly overlapping. Consequently, the second ends 10-2 of the first bars 10and the first ends 20-1 of the second bars 20 are not aligned along a sameline C, but rather displaced a distance across the line C. Thereby forming anequalization groove 40 along line C Which has a depth that is less than thedepth of the first or second grooves 30-1, 30-2. This is clearly illustrated inFigure 9.
    As indicated in Figure 5, a refiner segment 1 according to the currentdisclosure includes a plurality of groups of first and second bars 10, 20, eachof which includes a respective equalization groove 40.
    With reference to Figures 10-16 a plurality of embodiments of the currentdisclosure Will be described.
    As described previously, and now With reference to Figure 10, the first 10 andsecond 20 bars can be more or less interlaced. In the figure the arrangementof the first and second bars 10, 20 is illustrated as viewed from above and ina side view, also the center line of the equalization groove is indicated With adoted line. In the leftmost illustration the ends of the first and second bars 10,20 are aligned along the equalization groove 40 Without overlapping. In thecenter illustration the ends of the first and second bars 10, 20 overlap a smalldistance e.g. the chamfers Rl, R2 of the respective bars overlap. Finally, in12the rightmost illustration the first and second bars 10, 20 overlap to the extentthat the equalization groove 40 is a very shallow and narrow groove.
    With reference to Figure 11, the guiding surfaces R1, R2 or chamfers of thebars 10, 20 can have identical inclination and length, as illustrated in theleftmost drawing. However, they can also have differing inclination and length,as illustrated in the rightmost drawing. Thereby, the equalization groove 40can have a symmetrical or a-symmetrical V-shape.with ref-rence to Figure 12, the guiding surrces Rl, R2 (as mentionedpreviously) can have a respective linear, straight shape as illustrated in theleftmost drawing, but they can also have a non-linear or irregular shape asillustrated in the rightmost drawing. In this embodiment, only the guidingsurface R2 of second bars 20 have an irregular shape, whereas the guidingsurface R1 of the first bars 10 have a linear shape. Also other combinationsare possible, such as the previously mentioned polynomial shape or otherirregular shapes.
    With reference to Figure 13, embodiments where the width of the grooves 30-1, 30-2 are varied will be described. In most embodiments mentionedpreviously in this description, the width of the respective grooves 30-1, 30-2corresponds to the respective widths of the first and second bars 10, 20, asshown in the leftmost illustration. However, it is also possible to have a groovewidth that differs from the width of the respective first and second bars 10,20. Also the position of the respective bars 10, 20 relative the facing groove30-2, 30-1 can vary. In the center illustration the first bars 10 are aligned withthe center line of the facing groove 30-2, and correspondingly the second bars20 are aligned with the center line of the facing groove 30-1. However, it ispossible to have the bars un-aligned with the facing groove, as illustrated inthe rightmost drawing. Further, the width of the respective grooves is notnecessarily the same for all grooves within the groups of respective first andsecond bars 10, 20, which is also illustrated in the rightmost drawing.13With reference to Figure 14, an embodiment with varying height and width ofthe first and second bars 10, 20 will be described. The leftmost illustrationshows the case of having first and second bars 10, 20 that are equal in heightand width. In the rightmost illustration the second bars 20 are both wider andhave a larger height than the first bars 10, or vice versa.
    Additionally, With reference to Figure 15, the respective groups of first andsecond bars 10, 20 can be arranged at an angle relative each other. In theleftmost illustration the first and second bars 10, 20 are aligned, whereas inthe rightmost embodiment the first and second bars 10, 20 are arranged atan angle relative each other.
    With reference to Figure 16, a plurality of embodiments of the currentdisclosure, where the equalization groove 40 diverges from a straight line areillustrated. Starting at the leftmost illustration the equalization groove 40 canbe arranged such that its center line forms a straight angle or at a non-straightangle relative the first and second bars 10, 20. Further, the equalization groove40 can be arranged such that its center line forms an arch or a polynomialcurve relative the first and second bars 10, 20.
    The embodiments described above are merely given as examples, and it shouldbe understood that the proposed technology is not limited thereto. It will beunderstood by those skilled in the art that various modifications,combinations and changes may be made to the embodiments withoutdeparting from the present scope as defined by the appended claims. Inparticular, different part solutions in the different embodiments can becombined in other confígurations, where technically possible.
    权利要求:
    Claims (14)
    [1] 1. A refiner segment (1) for a refiner intended for defibrating lignocellulose-containing material, Which refiner segment has a refining surface and isarrangeable to form a part of a refining surface of said refiner, said refinersegment (1) having an inlet zone (2) directed in the direction of the feed flow ofa material to be refined and a refining zone (3) directed in the direction of thematerial flow of the refined material, and the refiner segment comprising a group of at least two first bars (10) and at least three second bars (20),each at least first and each of said at least three second bars (20) having afirst end (10-1, 20-1) directed in the direction of the inlet zone (2) and a secondend (10-2, 20-2) directed in the direction of the refining zone (3), and said at least two first bars (10) and said at least three second (20) barsare arranged in an interlaced manner in which said second ends (10-2) of saidfirst bars (10) are interlaced with said first ends (20-1) of said second bars (20-1) to form first grooves (30-1) between said first bars (10) corresponding to atleast the width of the second bars (20), and to form second grooves (30-2)between said second bars (20) corresponding to at least the width of the firstbars (10), and said second end (10-2) of the at least two first bars (10) has a respectiveguiding surface (Rl) decreasing from an upper surface of said at least one firstbar in the direction of the refining zone (2) to said second end (10-2), and said first end (20-1) of said at least three second bars (20) has arespective guiding surface (R2) increasing from the direction of the inlet zone(2) to an upper surface of said bar (20) towards the second end (20-2), and said second ends (10-2) of said first bars (10) and said first ends (20-1)of said second bars (20) are arranged to form an equalization groove (40)substantially across and perpendicular to said first and second bars (10, 20),wherein said equalization groove (40) is configured to buffer and distribute aflow of material from at least one of said first grooves (30-1) between said atleast two first bars (10) into one or more of said second grooves (30-2) formed between said at least three second bars (20).
    [2] 2. The refiner segment according to claím 1, wherein said equalizatíongroove (40), when viewed in a direction perpendicular to a lengthwise directionof said first and second bars and a normal direction to said refiner segment(1), is formed by inclined opposing surfaces formed by said first guiding surfaces (Rl) and said second (RQ) guiding surfaces.
    [3] 3. The refiner segment according to claím 2, wherein a distance betweensaid inclined opposing surfaces (Rl, RQ) increases along a normal direction to said refining surface.
    [4] 4. The refiner segment according to claím 3, wherein said increase is linear.
    [5] 5. The refiner segment according to claím 3, wherein said increase is polynomial.
    [6] 6. The refiner segment according to claím 3, wherein said equalizatíon groove (40) is v-shaped.
    [7] 7. The refiner segment according to claím 6, wherein said first guiding surface (Rl) and said second guiding surface (R2) have a same inclination.
    [8] 8. The refiner segment according to claím 6, wherein said first guiding surface (Rl) and said second guiding surface (R2) have differing inclinations.
    [9] 9. The refiner segment according to claím 1, wherein said first (10) and second (20) bars are arranged With different height.
    [10] 10. The refiner segment according to claím 1, wherein said first (10) and said second (20) bars are arranged With a same height. 16
    [11] 11. The refiner segment according to claim 3, wherein said equalizationgroove (40) has a depth equal to a depth of said first (30-1) and/ or second (30-2) valleys.
    [12] 12. The refiner segment according to claim 3, Wherein said equalization groove (40) has a depth less than the depth of said first and/ or second valleys.
    [13] 13. The refiner segment according to any of the previous claims, whereinsaid refiner segment compríses a plurality of groups of first (10) and second(ZÛ) bars, each such group comprisirig a respective equalizatiofi groove (40).
    [14] 14. A refiner arrangement for defibrating lignocellulose-containing material,comprising at least one refiner segment (1) according to any one of claims 1- 13.
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    法律状态:
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    申请号 | 申请日 | 专利标题
    SE1450243A|SE538142C2|2014-03-05|2014-03-05|Refiner segments and refiner for smoothing fiber flow in a refiner|SE1450243A| SE538142C2|2014-03-05|2014-03-05|Refiner segments and refiner for smoothing fiber flow in a refiner|
    ES15758328T| ES2701344T3|2014-03-05|2015-02-27|Method and arrangement for the equalization of the fiber flow in a refiner|
    EP15758328.7A| EP3114275B1|2014-03-05|2015-02-27|Method and arrangement for fiber flow equalization in a refiner|
    US15/122,672| US10597822B2|2014-03-05|2015-02-27|Method and arrangement for fiber flow equalization in a refiner|
    PCT/SE2015/050230| WO2015133962A1|2014-03-05|2015-02-27|Method and arrangement for fiber flow equalization in a refiner|
    CN201580011856.1A| CN106103843B|2014-03-05|2015-02-27|The method and apparatus of fiber stream equalization in refiner|
    PL15758328T| PL3114275T3|2014-03-05|2015-02-27|Method and arrangement for fiber flow equalization in a refiner|
    JP2016555559A| JP6471172B2|2014-03-05|2015-02-27|Method and apparatus for equalizing fiber flow in a refiner|
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