CN103306155A - Circumferential grinding head, multi-screw extrusion kneader and pulping method - Google Patents
Circumferential grinding head, multi-screw extrusion kneader and pulping method Download PDFInfo
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- CN103306155A CN103306155A CN2012101057934A CN201210105793A CN103306155A CN 103306155 A CN103306155 A CN 103306155A CN 2012101057934 A CN2012101057934 A CN 2012101057934A CN 201210105793 A CN201210105793 A CN 201210105793A CN 103306155 A CN103306155 A CN 103306155A
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Abstract
The invention relates to a circumferential grinding head, a multi-screw extrusion kneader and a pulping method. The circumferential grinding head adopts a new circumferential grinding mode, so that fibers can pass through a gap between moving grinding teeth in the circumferential direction of a moving grinding head and static grinding teeth inwards arranged in the circumferential direction of a lining tile. Under the condition that the length of the fibers is not influenced, the quantity of beam-like fibers in slurry can be greatly reduced, the fibers are dissociated in a high-efficient mode, and therefore the beating degree can be increased (the beating degree is increased by 3-8 degrees in the first section of pulping) and the quality of the slurry cannot be changed. The multi-screw extrusion kneader (including a double-screw extrusion kneader) adopts the circumferential grinding head to replace the traditional disc mill. Under the condition that the power equipment and the equipment cost are not increased, the content of the beam-like fibers can be effectively reduced, and the fiber resolution rate is over 70 percent. Therefore, the subsequent process of a high-consistency refiner is not needed, and the equipment cost and the energy consumption are saved.
Description
Technical field
The present invention relates to a kind of circumferential bistrique, particularly a kind of circumferential bistrique for pulp industry, and the twin-screw extruding kneader and the pulping process that adopt this circumferential bistrique.
Background technology
Multiscrew extruding kneader, come from the twin (double) screw extruder of plastics and food industry such as twin-screw extruding kneader, be to utilize the theoretical and a kind of high yield of exploitation of plastic extrusion engineering philosophy and modern paper slurrying, multi-functional, energy-saving cleaning machine pulping equipment, be mainly used in mechanical pulp in the paper industry and the preparation of chemi-mechanical pulp.It utilizes the screw element of two parallel, interlocks and homodromal screw rod and special construction, make fibre stuff when carrying, be subject to dynamic extruding, rely on interfibrous rubbing under the high density and high pressure, finish fibrous fracture and from solution, fiber primary wall (p layer) and secondary wall (S1 layer) are had fabulous execution, promote the physical property of pulping and raising paper.
The pulping process of common twin-screw extruding kneader is the rugosity effect that produces during according to the raw material axial compression so that fiber separation consumes low basis at energy and produces the paper pulp that fiber is long and adhesion is good.This method routine is installed the Three pressures combination region in machine, push the rubbing defibrination.Fibre bundle in the slurry that draws like this (also claiming bundle fiber) is a lot, and button solution degree is lower, and what obtain is thick slurry, need to follow-uply increase one high-density paste mill operation again and just can obtain refining.But the equipment of high-density paste mill is complicated, and cost is high, and power consumption is large, is unfavorable for energy-conservationly, has increased cost.
Summary of the invention
Circumferential bistrique of the present invention can greatly reduce the quantity of the bundle fiber in the slurry, and little to the effect length of fiber, thereby does not change the quality of slurry.Multiscrew extruding kneader of the present invention (comprising twin-screw extruding kneader) adopts described circumferential bistrique to replace traditional disc mill, in the situation that do not increase power disposition and equipment cost, can effectively reduce the content of bundle fiber, decompose the fiber rate more than 70%, thereby the operation that no longer needs follow-up high-density paste mill has been saved equipment cost and energy consumption.
A kind of circumferential bistrique comprises mandrel, lining tile, and be fixed on the described mandrel coaxial with mandrel and with the rotary bistrique of mandrel rotation; Described rotary bistrique is disc-shaped structure; Described rotary bistrique arranges a plurality of moving roll flutes in its disk side; Described lining tile is that circumferential hoop along described rotary bistrique is around at least a portion of described rotary bistrique periphery and its medial surface tubular structure radially relative with at least a portion of the disk side of rotary bistrique; Described lining tile arranges a plurality of quiet roll flutes on the side within it, and described moving roll flute and its directly make progress between the adjacent quiet roll flute at a distance of certain radial clearance.
Radial clearance between the lining tile medial surface of rotary bistrique disk side and its radially adjoining is identical; And/or the smallest radial gap between the quiet roll flute outer rim of moving roll flute outer rim and radially adjoining is 0.2mm to 0.5mm.
The fluting direction of moving roll flute and mandrel axial becomes non-perpendicular spiral angle; And/or the fluting direction of quiet roll flute and mandrel axial becomes non-perpendicular spiral angle; The fluting direction of moving roll flute or quiet roll flute refers to the fluting direction radially perpendicular to described moving roll flute or quiet roll flute; The fluting direction projection that the fluting direction of moving roll flute or quiet roll flute and the axial spiral angle of core refer to moving roll flute or quiet roll flute is to the angle of formation between axially upper and the mandrel of mandrel axial.
Fluting direction and the axial spiral angle of core of moving roll flute are 30 ° to 75 °; And/or the fluting direction of quiet roll flute and the axial spiral angle of core are 0 ° to 75 °.
The shape of the moving roll flute of same rotary bistrique and/or the quiet roll flute of same lining tile is identical, and/or the fluting direction of the quiet roll flute of the moving roll flute of same rotary bistrique and/or same lining tile, fluting shape, groove depth are identical; And/or the moving roll flute of same rotary bistrique circumferentially is intervally arranged along it by the disk side of some cycles in rotary bistrique; And/or the quiet roll flute of same lining tile circumferentially is intervally arranged along it by the medial surface of some cycles at lining tile; And/or moving roll flute and/or quiet roll flute are the gear teeth of roller gear or the gear teeth or the loose helical teeth of bevel gear; And/or moving roll flute and/or quiet roll flute are plane or cambered surface at the circumferential flank of tooth of rotary bistrique.
At least moving roll flute of one deck is arranged along its axial thickness direction in disk side in rotary bistrique; And/or arrange at least quiet roll flute of one deck at the lining tile medial surface along the axial thickness direction of core.
A kind of multiscrew extruding kneader comprises motor, mandrel, at least one group of pressure combination region; Described mandrel is at least two above-mentioned mandrels, at least two described mandrels are parallel, be arranged side by side, and be connected with motor, each the described mandrel in the end pressure combination region of section connects at least one above-mentioned circumferential bistrique afterwards, rotary bistrique on the different mandrels is parallel to each other, side by side, at a distance of certain radial clearance, described motor rotates it with moving mandrel's rotary bistrique separately respectively by described mandrel in parallel with each other between the moving roll flute outer rim of the rotary bistrique on the different mandrels.
Smallest radial gap between the moving roll flute outer rim of the moving roll flute outer rim of described rotary bistrique and the side by side adjacent rotary bistrique of adjacent mandrel is identical with the described smallest radial gap between moving roll flute and the quiet roll flute.
Described pressure combination region is to be formed by at least one malleation combination region and at least one back-pressure combination region; Described malleation combination region is comprised of the positive-pressure spiral cover side by side that is arranged on each described mandrel, described back-pressure combination region is comprised of the back-pressure screw casing side by side that is arranged on each described mandrel, and the axial interocclusal clearance between the back-pressure screw casing that the positive-pressure spiral cover in the same pressure combination region is adjacent is 0.5mm to 1mm.
A kind of twin-screw extruding kneader, described twin-screw extruding kneader are above-mentioned multiscrew extruding kneaders.
A kind of pulping process of mechanical pulp, dense water conservancy pulper during the slurry after fibre material enters above-mentioned multiscrew extruding kneader or twin-screw extruding kneader directly enters is finished making beating and screening process afterwards.
A kind of pulping process of chemi-mechanical pulp, the slurry after fibre material enters above-mentioned multiscrew extruding kneader or twin-screw extruding kneader directly enters reaction warehouse, the operation of finishing afterwards medium consistency refining, screen and manufacture paper with pulp.
Technique effect of the present invention
A kind of circumferential bistrique of the present invention, adopt brand-new circumferential lapping mode, make fiber pass through the moving roll flute of rotary bistrique circumferencial direction and the gap between the inside quiet roll flute that arranges of lining tile circumferencial direction, in the situation that do not affect fibre length, can greatly reduce the quantity of bundle fiber in the slurry, efficient defibrating, thus button solution degree (in first paragraph slurrying, improving button solution degree 3-8 degree) can be improved, do not change again the quality of slurry.
The rotary bistrique disk side of the further scheme of the present invention is identical with radial clearance between the lining tile medial surface of its radially adjoining, obtains the material of equal uniformity in the time of can making fibre material by circumferential bistrique like this.The further scheme of the present invention provides the smallest radial gap of the quiet roll flute outer rim of preferred moving roll flute outer rim and radially adjoining, according to the slurry that can obtain the different decomposition rate in smallest radial gap, obtain the different slurries of separating fine situation and different button solution degree thereby can the smallest radial gap be set according to different situations.
Spiral angle between the fluting direction that the further scheme of the present invention can arrange according to the factors such as characteristic of mandrel rotating speed, fiber moving roll flute and mandrel axial, at moving roll flute when mandrel rotates, in moving roll flute milled fiber material, described spiral angle can advance fibre material to pass through rotary bistrique, thereby guarantees the slurry discharging speed.The further scheme of the present invention can arrange according to the factors such as characteristic of mandrel rotating speed, fiber the fluting direction of quiet roll flute and mandrel axially between spiral angle, be convenient to the milled fiber material on the one hand, be convenient on the other hand passing through of slurry.
The further scheme of the present invention provide the fluting direction of moving roll flute and/or quiet roll flute and mandrel axially between the preferred value of spiral angle, be proven, reduce the resistance of slurry by circumferential bistrique the time, improve the slurry discharging speed.
The further scheme of the present invention provides the respectively preferred arrangement on rotary bistrique and/or lining tile of moving roll flute and/or quiet roll flute, and the preferred concrete mode of the circumferential bistrique milled fiber of specific implementation material is provided.
The moving roll flute that the further scheme of the present invention provides in rotary bistrique disk side and/or the lining tile medial surface is arranged and/or the layout number of plies of quiet roll flute, individual layer is arranged and is convenient to improve the slurry discharging speed, multilayer is arranged the fineness of being convenient to improve slurry, and the number of plies of layout can be set according to actual needs.
The invention provides a kind of multiscrew extruding kneader, adopt a plurality of mandrels and parallel, side by side the circumferential bistrique identical with mandrel quantity, so that a plurality of rotary bistriques can act synergistically, both improved defibrination efficient, equipment investment and manufacturing cost have been reduced, the again requirement of other operation in the realistic production.
The moving roll flute outer rim that the further scheme of the present invention makes described rotary bistrique is identical with the described smallest radial gap between moving roll flute and the quiet roll flute with the smallest radial gap between the moving roll flute outer rim of the side by side adjacent rotary bistrique of adjacent mandrel, thereby makes by the slurry of circumferential bistrique more even.
The present invention further scheme provides the preferred value of the axial interocclusal clearance between the back-pressure screw casing that the positive-pressure spiral cover in the pressure combination region is adjacent, so that slurry was ground before entering circumferential bistrique fully, be conducive to by obtaining uniform refining behind the circumferential bistrique.
The claimed a kind of twin-screw extruding kneader of the present invention belongs to above-mentioned multiscrew extruding kneader, and therefore all technique effects of above-mentioned multiscrew extruding kneader similarly are applicable to this twin-screw extruding kneader.
The pulping process of a kind of mechanical pulp of the present invention, owing to having adopted the multiscrew extruding kneader (comprising above-mentioned twin-screw extruding kneader) with above-mentioned circumferential bistrique, after the process grinding steps of circumferential bistrique, through pulping, after the screening, 70% slurry can directly be joined and copied paper, all the other 30% thicker slurries only need to can reach by middle-density refiner or low dense fiberizer the degree reuse of refining, with respect to traditional handicraft, the operation of having omitted part even all having passed through high-density paste mill, reduced equipment cost, and the energy that consumes reduces greatly.
The pulping process of chemi-mechanical pulp of the present invention, owing to having adopted the multiscrew extruding kneader (comprising above-mentioned twin-screw extruding kneader) with above-mentioned circumferential bistrique, after the process grinding steps of circumferential bistrique, through pulping, after the screening, 70% slurry can directly be joined and copied paper, all the other 30% thicker slurries only need to can reach by middle-density refiner or low dense fiberizer the degree reuse of refining, with respect to traditional handicraft, the operation of having omitted part even all having passed through high-density paste mill, reduced equipment cost, and the energy that consumes reduces greatly.
Description of drawings
Fig. 1 a is the front view of a specific embodiment of the circumferential bistrique of the present invention.
Fig. 1 b is the rotary bistrique of Fig. 1 a and the partial enlarged drawing of lining tile gap.
Fig. 1 c is the side view of the part rotary bistrique of a specific embodiment of the present invention.
Fig. 1 d be a specific embodiment of the present invention the part lining tile side view.
Fig. 2 a is the front view of a specific embodiment of the circumferential bistrique of the present invention.
Fig. 2 b is the top view of the circumferential bistrique of Fig. 2 a.
Fig. 3 a is the top view of the twin-screw extruding kneader of a specific embodiment of the present invention.
Fig. 3 b is the top view of many (three) screw extruding kneader of a specific embodiment of the present invention.
Fig. 3 c is the right view of many (three) screw extruding kneader of a specific embodiment of the present invention.
Fig. 4 a is the flow chart of a specific embodiment take the wood chip class as raw material of mechanical pulp of the present invention.
Fig. 4 b is the flow chart of a specific embodiment take careless class as raw material of mechanical pulp of the present invention.
Fig. 5 a is the flow chart of a specific embodiment take the wood chip class as raw material of chemi-mechanical pulp of the present invention.
Fig. 5 b is the flow chart of a specific embodiment take careless class as raw material of chemi-mechanical pulp of the present invention.
Fig. 6 a is the flow chart of a specific embodiment take the wood chip class as raw material of bleached chemi-mechanical pulp of the present invention.
Fig. 6 b is the flow chart of a specific embodiment take careless class as raw material of bleached chemi-mechanical pulp of the present invention.
Reference numeral is as follows:
The upper machine barrel of 1-, 2-press strip, 3-single ended bolt, 4-lining tile, the 5-rotary bistrique, 6-mandrel, 7-square head bolt, machine barrel under the 9-, the quiet roll flute of 41-, 51-moves roll flute, radial clearance between the moving roll flute of d-and the quiet roll flute, the radial clearance between d '-moving roll flute, x-mandrel axial, the fluting direction of the moving roll flute of c-, the spiral angle between the fluting direction of c '-quiet roll flute, the fluting direction of the moving roll flute of a-and mandrel axial, E-right-handed screw cover, F-backpitch cover, the circumferential bistrique of G-.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.
Fig. 1 a to Fig. 1 d is a specific embodiment of the circumferential bistrique of the present invention.A kind of circumferential bistrique as shown in Figure 1a, comprises mandrel 6, lining tile 4, and machine barrel (can comprise as shown in the figure machine barrel 1 and lower machine barrel 9), and be fixed on the described mandrel 6 coaxial with mandrel 6 and with the rotary bistrique 5 of mandrel 6 rotations.Therefore the axial x of mandrel 6 also is the axial x of rotary bistrique 5.Described lining tile 4 is fixed on the machine barrel.Lining tile 4 can be Split type structure with machine barrel, is convenient to when lining tile damages, it be changed, and can certainly be integrative-structure.As a specific embodiment, shown the concrete mode that lining tile 4 is fixed in upper machine barrel 1 and lower machine barrel 9 by press strip 2, single ended bolt 3 and square head bolt 7 among Fig. 2 a.Can certainly otherwise, such as welding or riveted joint etc., lining tile 4 be fixed on the machine barrel.Described machine barrel can be being combined by upper machine barrel 1 and lower machine barrel 9 as shown in Figure 1a, is convenient to processing and installs, and can certainly be has the machine barrel that combines more than two parts or the machine barrel of one.Described rotary bistrique 5 is disc-shaped structure, as shown in Figure 1a.Described rotary bistrique 5 arranges a plurality of moving roll flutes 51 in its disk side; Described lining tile 4 is that circumferential hoop along described rotary bistrique 5 is around at least a portion of described rotary bistrique 5 peripheries and its medial surface tubular structure radially relative with at least a portion of the disk side of rotary bistrique 5; Described lining tile 4 arranges a plurality of quiet roll flutes 41 on the side within it, and described moving roll flute 51 and its directly make progress between the adjacent quiet roll flute 41 at a distance of certain radial clearance d, shown in Fig. 1 b.Need to prove, in Fig. 1 a, Fig. 2 a and Fig. 3 c, do not show and set out roll flute 51 and quiet roll flute 41, Fig. 1 b is that Fig. 1 a is at the enlarged drawing at one section rotary bistrique 5 and position, lining tile 4 gap.
Circumferential bistrique of the present invention, adopt brand-new circumferential lapping mode, make fiber pass through the moving roll flute 51 of rotary bistrique 5 circumferencial directions and the gap between the inside quiet roll flute 41 that arranges of lining tile 4 circumferencial directions, in the situation that do not affect fibre length, can greatly reduce the quantity of bundle fiber in the slurry, thereby efficient defibrating can improve button solution degree (improving button solution degree 3-8 degree in phase I slurrying), does not change again the quality of slurry.
Preferably, the radial clearance d between lining tile 4 medial surfaces of rotary bistrique 5 disk sides and its radially adjoining is all identical, such as the situation of Fig. 1 a, obtains the material of equal uniformity in the time of can making fibre material by circumferential bistrique like this.
Preferably, the smallest radial gap d between quiet roll flute 41 outer rims of described moving roll flute 51 outer rims and radially adjoining is 0.2mm to 0.5mm.If the smallest radial gap d is 0.2mm, decomposition fiber rate is high, if the smallest radial gap d is 0.5mm, decomposition fiber rate is low.Can thereby the slurry that the smallest radial gap d obtains different defibrating states and different button solution degree be set according to different situations.
The moving roll flute 51 of rotary bistrique 5 can be regarded as that the groove of radially inscribing certain depth in the disk side forms, the quiet roll flute 41 of lining tile 4 can be regarded as that radially to inscribe the groove of certain depth at the medial surface of lining tile 4 formed, therefore can represent respectively to move the respectively distribution on the medial surface of the disk side of rotary bistrique 5 and lining tile 4 of roll flute 51 and quiet roll flute 41 with fluting direction c and c '.The fluting direction c of moving roll flute 51 or quiet roll flute 41 or c ' refer to the fluting direction radially perpendicular to described moving roll flute or quiet roll flute among the present invention, rather than refer to along the groove depth direction.Rotary bistrique 5 radially be the tooth depth direction of moving roll flute 51.Among the present invention, the fluting direction projection that the fluting direction of moving roll flute or quiet roll flute and the axial spiral angle of core refer to moving roll flute or quiet roll flute to axially upper and the mandrel of mandrel axially between the angle that forms, be the spiral angle a that moves between the axial x of the fluting direction c of roll flute and mandrel as shown in Fig. 1 b.Within the gap between described rotary bistrique 5 and the described lining tile 4, shown in Fig. 1 b and Fig. 1 c, the fluting direction c of moving roll flute 51 becomes non-perpendicular spiral angle a with the axial x of mandrel; The fluting direction of quiet roll flute and mandrel axial becomes non-perpendicular spiral angle.The fluting direction c ' of quiet roll flute 41 can concern without corresponding with the fluting direction c of moving roll flute 51.
Preferably, the spiral angle a of the fluting direction c of moving roll flute 51 and the axial x of mandrel is 30 ° to 75 °, so that promote that material is fed forward when rotary bistrique 5 is rotated with mandrel 6.This spiral angle can be according to the speed setting of mandrel 6.Preferably, the fluting direction c ' of quiet roll flute 41 is 0 ° to 75 ° with the spiral angle of the axial x of mandrel 6, preferred, because lining tile 4 is fixed, quiet roll flute 41 is also fixed, so the axial spiral angle of the fluting direction c ' of quiet roll flute 41 and mandrel 6 is preferably 0 °, namely this spiral angle is parallel with the axial x of mandrel 6, shown in Fig. 1 d, the material of being more convenient for like this is by circumferential bistrique.Certainly, also can apply alternate manner for the driving of the material in the circumferential bistrique, such as compression cylinder etc., the fluting direction c ' of quiet like this roll flute 41 also can be other angle with the axial spiral angle of mandrel 6.Certainly these two spiral angles also can be set its corresponding relation according to factors such as rotating speeds.
Need to prove, in the situation that Fig. 1 a, lining tile 4 is cylindrical shapes, therefore also can be the axial x rotation around mandrel, its direction of rotation can be identical with the direction of rotation of rotary bistrique 5, but friction speed, can also be different from the direction of rotation of rotary bistrique 5, thus reach better abrasive material effect.At this moment, the fluting direction c ' of quiet roll flute 41 can set according to factors such as rotating speeds with the axial spiral angle of mandrel 6.
Preferably, the shape of the quiet roll flute 41 of the moving roll flute 51 of same rotary bistrique 5 and/or same lining tile 4 can be identical; Can certainly be different.The fluting direction c of the moving roll flute 51 of same rotary bistrique 5 and/or the quiet roll flute 41 of same lining tile 4 and/or c ', the fluting shape, groove depth can be identical; Can certainly be different.The moving roll flute 51 of same rotary bistrique 5 can circumferentially be intervally arranged along it by the disk side of some cycles in rotary bistrique 5; The quiet roll flute 41 of same lining tile 4 can circumferentially be intervally arranged along it by the medial surface of some cycles at lining tile 4; Moving roll flute 51 and/or quiet roll flute 41 can be the gear teeth of the gear teeth of roller gear or bevel gear or loose helical teeth etc., can certainly be other gears of the prior art; Moving roll flute 51 and/or quiet roll flute 41 are plane or cambered surface at the rotary bistrique 5 circumferential flank of tooth.
A plurality of fluting direction c of rotary bistrique 5 preferably, are of similar shape, size; Can certainly be different.A plurality of fluting direction c ' of lining tile 4 preferably are of similar shape, size; Can certainly be different.The size that is a plurality of moving roll flute 51 on the same rotary bistrique 5 is normally identical with spiral angle; The size of a plurality of quiet roll flute 41 on the same lining tile 4 is normally identical with spiral angle.
At least moving roll flute 51 of one deck is arranged along the thickness direction of its axial x in disk side in rotary bistrique 5.Arrange at least quiet roll flute 41 of one deck at lining tile 4 medial surfaces along the thickness direction of the axial x of mandrel.The individual layer of moving roll flute 51 and/or quiet roll flute 41 is arranged and is convenient to improve the slurry discharging speed, moves the multilayer of roll flute 51 and/or quiet roll flute 41 and arranges the fineness of being convenient to improve slurry.The number of plies of layout can be set according to actual needs
As a specific embodiment, described mandrel 6 can, side by side mandrel parallel at least two, and each described mandrel 6 connects a described rotary bistrique 5, and the rotary bistrique 5 on a plurality of different mandrels 6 can be parallel, be arranged side by side, shown in Fig. 2 a and 2b.Smallest radial gap d between moving roll flute 51 outer rims of moving roll flute 51 outer rims of rotary bistrique 5 and adjacent side by side adjacent rotary bistrique 5 ' (shown in Fig. 2 b), preferably, can with moving roll flute 51 and quiet roll flute 41 between described smallest radial gap d identical, can make a plurality of rotary bistrique 5 synergies, both improved defibrination efficient, equipment investment and manufacturing cost have been reduced, the again requirement of other operation in the realistic production.Fig. 3 c is the schematic diagram that circumferential bistrique has three parallel, rotary bistriques 5 of being arranged side by side.Certainly, circumferentially the quantity of the rotary bistrique 5 of bistrique can also be more, such as four.
A kind of multiscrew extruding kneader shown in Fig. 2 a, 2b and Fig. 3 a to 3c, comprises motor, mandrel 6, at least one group of pressure combination region.Described pressure combination region is to be formed by at least one malleation combination region E and at least one back-pressure combination region F, shown in Fig. 3 a.Described malleation combination region E is comprised of the positive-pressure spiral cover side by side that is arranged on each described mandrel 6, described back-pressure combination region F is comprised of the back-pressure screw casing side by side that is arranged on each described mandrel 6, form the higher-pressure region between the malleation combination region E of a pressure combination region and the back-pressure combination region F, make fibre material be squeezed power and shearing force and refinement.Described mandrel 6 is at least two above-mentioned mandrels 6, and at least two described mandrels are 6 parallel, be arranged side by side, and is connected with motor, can be to be connected with same motor, also can be to be connected by two motors respectively.Being that two mandrels 6 are the situation of twin-screw extruding kneader such as Fig. 3 a, is three mandrels, the i.e. situation of three screw extruding kneaders such as Fig. 3 b.Certainly can also be the situation of more mandrels, such as four screw extruding kneaders of four mandrels 6.Each the described mandrel 6 in the end pressure combination region (shown in Fig. 3 a, then being the 4th pressure combination region) of section connects at least one above-mentioned circumferential bistrique afterwards.Rotary bistrique on the different mandrels 6 is 5 parallel to each other, side by side, between moving roll flute 51 outer rims of the rotary bistrique 5 on the different mandrels 6 at a distance of certain radial clearance d ', shown in Fig. 2 b.And, every kind of multiscrew extruding kneader all can be with the above-mentioned circumferential bistrique more than a group, be that a plurality of circumferential bistrique group G (be with a circumferential bistrique on each mandrel 6, and the circumferential bistrique on all mandrels being parallel, being arranged side by side is called a circumferential bistrique group) are connected on the mandrel 6.Preferably, axial interocclusal clearance between the back-pressure screw casing that positive-pressure spiral cover in the same pressure combination region is adjacent is 0.5mm to 1mm, so that slurry was ground before entering circumferential bistrique fully, be conducive to by obtaining uniform refining behind the circumferential bistrique.
Described motor rotates it with moving mandrel's rotary bistrique 5 separately respectively by described mandrel 6 in parallel with each other.Preferably, the described mandrel 6 of described driven by motor respectively with moving mandrel's rotary bistrique 5 separately make that it is parallel to each other, in the same way, synchronously rotation, can obtain uniform slurry.Certainly, also can mandrel 6 of an Electric Machine Control, motor can be more flexible to the control of mandrel 6 like this, such as both can control all mandrels 6 parallel to each other, in the same way, synchronously rotation, also can control mandrel 6 parallel to each other, but rotate not in the same way (such as reverse in twos), can also control mandrel 6 parallel to each other but asynchronous (such as, when the diameter of the circumferential bistrique that connects when mandrel is not identical, can make the rotating speed of mandrel different) rotate.
Preferably, when described mandrel 6 drove other parts (such as screw casing, comprising positive-pressure spiral cover and/or back-pressure screw casing) rotation, mandrel 6 is rotating Vortex as required.Certainly, mandrel 6 also can counter-rotate each other.
Preferably, the smallest radial gap d between moving roll flute 51 outer rims of moving roll flute 51 outer rims of rotary bistrique 5 and the side by side adjacent rotary bistrique 5 of adjacent mandrel 6 ' and moving roll flute 51 and quiet roll flute 41 between described smallest radial gap d identical.Radial clearance d everywhere is all identical with d ', can guarantee by the slurry of circumferential bistrique more even.
Shown in Fig. 3 a, in order not change existing technique, existing mandrel 6 and existing pressure combination region, and circumferential bistrique G is installed the in the end end after the section pressure combination region of mandrel 6, the thickness of described rotary bistrique 5 can be less than the pitch helical pitch of malleation combination region E and/or the back-pressure combination region F of described pressure combination region.When the circumferential bistrique G of the 4th pressure combination region is installed, can be according to the malleation combination region of the length adjustment Three pressures combination region of the axial thickness of circumferential bistrique G and mandrel 6 and/or the length of back-pressure combination region.Also malleation combination region E can only be installed in the 4th pressure combination region, uneasy anti-loaded pressure combination region F but circumferential bistrique G directly is installed afterwards is to cooperate the length of mandrel 6.
Multiscrew extruding kneader of the present invention especially, when the quantity of mandrel 6 is two, is twin-screw extruding kneader commonly used, and the technique effect of above-mentioned circumferential bistrique and multiscrew extruding kneader similarly is applicable to twin-screw extruding kneader.
Multiscrew of the present invention extruding kneader (comprising twin-screw extruding kneader) adopts described circumferential bistrique to replace traditional disc mill, in machine design and installation the 4th pressure combination region, and selected the refining function of high dense mill to carry out defibrination.Facts have proved the method in the situation that do not increase power disposition and equipment cost, can effectively reduce the content of bundle fiber, decompose the fiber rate more than 70%, in first paragraph slurrying, improve button solution degree 3-8 degree.Thereby the operation that no longer needs follow-up high-density paste mill has been saved equipment cost and energy consumption.
Adopt the pulping process (pulping process) of above-mentioned multiscrew extruding kneader (comprising twin-screw extruding kneader) also to change thereupon.As the specific embodiment of the present invention, the invention provides twin-screw extruding kneader and be the pulping process of mechanical pulp of example and the pulping process of chemi-mechanical pulp and bleached chemi-mechanical pulp, be summarized as follows.
The pulping process of a kind of mechanical pulp of the present invention, fibre material enter above-mentioned twin-screw extruding kneader (also can be other multiscrew extruding kneader) slurry afterwards directly enter in dense water conservancy pulper, finish afterwards making beating, the operation of screening and manufacture paper with pulp is shown in Fig. 4 a, Fig. 4 b.Through after the grinding steps of circumferential bistrique, after the pulping screening, 70% slurry can directly carry out follow-up making beating, screening and the operation of manufacturing paper with pulp, all the other 30% thicker slurries only need to can reach by middle-density refiner or low dense fiberizer the degree reuse of refining, with respect to traditional handicraft, omitted the operation through high-density paste mill, and the energy that consumes reduces greatly.
Be depicted as to join such as Fig. 4 a and copy boxboard, the pulping process of the mechanical pulp of fluting medium etc.Through above-mentioned twin-screw extruding kneader (also can be other multiscrew extruding kneader) afterwards, dense water conservancy pulper and middle-density refiner in only need entering are directly joined through screening process and are copied paper and get final product
The pulping process of a kind of chemi-mechanical pulp of the present invention, enter above-mentioned twin-screw extruding kneader (also can be above-mentioned multiscrew extruding kneader) slurry afterwards at fibre material and directly enter reaction warehouse, finish afterwards medium consistency refining, the operation of screening and manufacture paper with pulp is shown in Fig. 5 a, 5b.Through after the grinding steps of circumferential bistrique, behind pulping and screening process, 70% slurry can directly carry out follow-up making beating and screening process, all the other 30% thicker slurries only need to can reach by middle-density refiner or low dense fiberizer the degree reuse of refining, with respect to traditional handicraft, omitted the operation through high-density paste mill, and the energy that consumes reduces greatly.
As the specific embodiment, the bleached chemi-mechanical pulp technological process is shown in Fig. 6 a, 6b.Enter above-mentioned twin-screw extruding kneader (also can be above-mentioned multiscrew extruding kneader) slurry afterwards at fibre material and directly enter reaction warehouse, through the pulping operation, 70% slurry can directly be joined and copied paper behind the screening technology, reuse behind dense mill or the low dense defibrination during all the other 30% slurries only need pass through.
Claims (12)
1. a circumferential bistrique is characterized in that, comprises mandrel, lining tile, and be fixed on the described mandrel coaxial with mandrel and with the rotary bistrique of mandrel rotation; Described rotary bistrique is disc-shaped structure; Described rotary bistrique arranges a plurality of moving roll flutes in its disk side; Described lining tile is that circumferential hoop along described rotary bistrique is around at least a portion of described rotary bistrique periphery and its medial surface tubular structure radially relative with at least a portion of the disk side of rotary bistrique; Described lining tile arranges a plurality of quiet roll flutes on the side within it, and described moving roll flute and its directly make progress between the adjacent quiet roll flute at a distance of certain radial clearance.
2. circumferential bistrique according to claim 1 is characterized in that, the radial clearance between the lining tile medial surface of rotary bistrique disk side and its radially adjoining is identical; And/or the smallest radial gap between the quiet roll flute outer rim of moving roll flute outer rim and radially adjoining is 0.2mm to 0.5mm.
3. circumferential bistrique according to claim 1 and 2 is characterized in that, the fluting direction of moving roll flute and mandrel axial becomes non-perpendicular spiral angle; And/or the fluting direction of quiet roll flute and mandrel axial becomes non-perpendicular spiral angle; The fluting direction of moving roll flute or quiet roll flute refers to the fluting direction radially perpendicular to described moving roll flute or quiet roll flute; The fluting direction projection that the fluting direction of moving roll flute or quiet roll flute and the axial spiral angle of core refer to moving roll flute or quiet roll flute is to the angle of formation between axially upper and the mandrel of mandrel axial.
4. circumferential bistrique according to claim 3 is characterized in that, fluting direction and the axial spiral angle of core of moving roll flute are 30 ° to 75 °; And/or the fluting direction of quiet roll flute and the axial spiral angle of core are 0 ° to 75 °.
5. according to claim 3 or 4 described circumferential bistriques, it is characterized in that, the shape of the moving roll flute of same rotary bistrique and/or the quiet roll flute of same lining tile is identical, and/or the fluting direction of the quiet roll flute of the moving roll flute of same rotary bistrique and/or same lining tile, fluting shape, groove depth are identical; And/or the moving roll flute of same rotary bistrique circumferentially is intervally arranged along it by the disk side of some cycles in rotary bistrique; And/or the quiet roll flute of same lining tile circumferentially is intervally arranged along it by the medial surface of some cycles at lining tile; And/or moving roll flute and/or quiet roll flute are the gear teeth of roller gear or the gear teeth or the loose helical teeth of bevel gear; And/or moving roll flute and/or quiet roll flute are plane or cambered surface at the circumferential flank of tooth of rotary bistrique.
6. according to claim 1 to one of 5 described circumferential bistriques, it is characterized in that, arrange at least moving roll flute of one deck in the disk side of rotary bistrique along its axial thickness direction; And/or arrange at least quiet roll flute of one deck at the lining tile medial surface along the axial thickness direction of core.
7. a multiscrew extruding kneader is characterized in that, comprises motor, mandrel, at least one group of pressure combination region; Described mandrel is the described mandrel of one of at least two claims 1 to 6, at least two described mandrels are parallel, be arranged side by side, and be connected with motor, each the described mandrel in the end pressure combination region of section connects the described circumferential bistrique of one of at least one claim 1 to 6 afterwards, rotary bistrique on the different mandrels is parallel to each other, side by side, at a distance of certain radial clearance, described motor rotates it with moving mandrel's rotary bistrique separately respectively by described mandrel in parallel with each other between the moving roll flute outer rim of the rotary bistrique on the different mandrels.
8. multiscrew according to claim 7 pushes kneader, it is characterized in that, the smallest radial gap between the moving roll flute outer rim of the moving roll flute outer rim of described rotary bistrique and the side by side adjacent rotary bistrique of adjacent mandrel is identical with the described smallest radial gap between moving roll flute and the quiet roll flute.
9. according to claim 7 or 8 described multiscrews extruding kneaders, it is characterized in that, described pressure combination region is to be formed by at least one malleation combination region and at least one back-pressure combination region; Described malleation combination region is comprised of the positive-pressure spiral cover side by side that is arranged on each described mandrel, described back-pressure combination region is comprised of the back-pressure screw casing side by side that is arranged on each described mandrel, and the axial interocclusal clearance between the back-pressure screw casing that the positive-pressure spiral cover in the same pressure combination region is adjacent is 0.5mm to 1mm.
10. a twin-screw extruding kneader is characterized in that, described twin-screw extruding kneader is the described multiscrew extruding of one of claim 7 to 9 kneader.
11. the pulping process of a mechanical pulp, it is characterized in that, dense water conservancy pulper during slurry after fibre material enters the twin-screw extruding kneader of the multiscrew extruding kneader of one of claim 7 to 9 or claim 10 directly enters is finished afterwards and is pulled an oar and screening process.
12. the pulping process of a chemi-mechanical pulp, it is characterized in that, slurry after fibre material enters the twin-screw extruding kneader of the multiscrew extruding kneader of one of claim 7 to 9 or claim 10 directly enters reaction warehouse, the operation of finishing afterwards medium consistency refining, screen and manufacture paper with pulp.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210105793.4A CN103306155B (en) | 2012-03-09 | 2012-04-12 | Circumference bistrique and multiscrew extruding kneader, pulping process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210062134.7 | 2012-03-09 | ||
| CN2012100621347 | 2012-03-09 | ||
| CN201210062134 | 2012-03-09 | ||
| CN201210105793.4A CN103306155B (en) | 2012-03-09 | 2012-04-12 | Circumference bistrique and multiscrew extruding kneader, pulping process |
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| CN103306155A true CN103306155A (en) | 2013-09-18 |
| CN103306155B CN103306155B (en) | 2016-04-13 |
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| CN2012201531057U Expired - Lifetime CN202559176U (en) | 2012-03-09 | 2012-04-12 | Circumferential grinding head and multi-screw extrusion kneading machine |
| CN201210105793.4A Active CN103306155B (en) | 2012-03-09 | 2012-04-12 | Circumference bistrique and multiscrew extruding kneader, pulping process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107541977A (en) * | 2017-09-30 | 2018-01-05 | 河北天正筛选制浆设备有限公司 | A kind of multiscrew high concentration displacement washing defibrination discongests device and slurry washing system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202559176U (en) * | 2012-03-09 | 2012-11-28 | 张宇 | Circumferential grinding head and multi-screw extrusion kneading machine |
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| US4393983A (en) * | 1978-04-28 | 1983-07-19 | Eriksson Erik F | Intermeshing screw-type refiner |
| CN1648332A (en) * | 2004-01-28 | 2005-08-03 | 邱圣渊 | Paper-making method by pulping |
| CN1673451A (en) * | 2004-03-24 | 2005-09-28 | 天津科技大学 | Double-screw fiberizer with tooth-shape disc |
| US7396435B2 (en) * | 2003-09-29 | 2008-07-08 | Weyerhaeuser Co. | Method for conveying, mixing, and leveling dewatered pulp prior to drying |
| CN201221039Y (en) * | 2008-05-01 | 2009-04-15 | 李志� | Paper-making pulping apparatus |
| CN202047313U (en) * | 2011-03-09 | 2011-11-23 | 上海尚鼎机械科技有限公司 | Cylindrical pulping machine |
| CN202559176U (en) * | 2012-03-09 | 2012-11-28 | 张宇 | Circumferential grinding head and multi-screw extrusion kneading machine |
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| US4393983A (en) * | 1978-04-28 | 1983-07-19 | Eriksson Erik F | Intermeshing screw-type refiner |
| US7396435B2 (en) * | 2003-09-29 | 2008-07-08 | Weyerhaeuser Co. | Method for conveying, mixing, and leveling dewatered pulp prior to drying |
| CN1648332A (en) * | 2004-01-28 | 2005-08-03 | 邱圣渊 | Paper-making method by pulping |
| CN1673451A (en) * | 2004-03-24 | 2005-09-28 | 天津科技大学 | Double-screw fiberizer with tooth-shape disc |
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| CN202559176U (en) * | 2012-03-09 | 2012-11-28 | 张宇 | Circumferential grinding head and multi-screw extrusion kneading machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107541977A (en) * | 2017-09-30 | 2018-01-05 | 河北天正筛选制浆设备有限公司 | A kind of multiscrew high concentration displacement washing defibrination discongests device and slurry washing system |
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| Publication number | Publication date |
|---|---|
| CN103306155B (en) | 2016-04-13 |
| CN202559176U (en) | 2012-11-28 |
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