JP7007166B2 - Dissociation machine - Google Patents

Description

The present invention relates to a dissociation machine that dissociates and disperses recovered used paper, waste paper, and the like in water to separate pulp fibers and generate a slurry containing the pulp fibers.

For example, when paper is manufactured by a paper machine in a paper mill, unsuitable waste paper is generated as a product when the paper machine starts operation or when a problem occurs in the paper machine and the desired quality cannot be obtained. .. Since this waste paper is collected after passing through the dry part in the paper machine, it has a form as paper. The recovered waste paper will be used again as a raw material for papermaking, but since it is in the form of paper, it cannot be used as a raw material in that state and must be separated into pulp fibers. A dissociator is used as a device for this purpose. Further, in the case of producing recycled paper, it is necessary to separate the pulp fibers from the collected used paper, and a disintegrator is also used in this case.

FIG. 6 shows a schematic structure of the horizontal disengagement machine 1. The disengagement machine 1 is a combination of a rotor 2 and a stator 3. Note that FIG. 6 shows a state in which the stator 3 is opened. The rotor 2 and the stator 3 are configured by concentrically arranging rings having blades, respectively, and the surfaces on which the blades are formed are arranged so as to face each other. The raw material is supplied from the supply port 1a and is supplied in the direction indicated by the arrow P, that is, in the direction of the rotation axis of the rotor 2, and moves from the central portion to the outer peripheral portion of the rotor, that is, in the outer peripheral direction due to the high-speed rotation of the rotor 2. While doing so, the pulp fibers are dissociated by receiving an impact between the blade of the rotor 2 and the blade of the stator 3. Further, a stirring blade 4 that rotates together with the rotor 2 is provided at the center of the rotor 2, and the supplied raw material is discharged from the discharge port 1b in the outer peripheral direction indicated by the arrow mark Q while being stirred.

9 and 10 are views showing the respective blade surfaces of the conventional rotor 2 and stator 3. The rotor 2 is provided with four sets of rings 2a, 2b, 2c, 2d each having a blade formed therein, and the stator 3 is provided with four sets of rings 3a, 3b, 3c, 3d each having a blade formed therein. Is provided. The rings 2a, 2b, 2c, 2d of the rotor 2 and the rings 3a, 3b, 3c, 3d of the stator 3 are arranged alternately. Therefore, when the supplied raw material moves in the arrow Q direction, the stirring blade 4 to the ring 2a of the rotor 2, the ring 3a of the stator 3, the ring 2b, the ring 3b, the ring 2c, the ring 3c, the ring 2d, The ring 3d is gradually moved in the outer peripheral direction, is dissociated by receiving a shearing force, and is discharged to the outside from the discharge port 1b.

Further, the rings 2a, 2b, 2c, 2d of the rotor 2 and the rings 3a, 3b, 3c, 3d of the stator 3 all have a large blade width of the inner ring, a small number of blades, and a large blade spacing. The blade width gradually decreases toward the outside, the number of blades increases, and the blade spacing decreases.

In the dissociator 1, the charged raw material receives the flow of the circulation generated by the rotation of the rotor 2 and passes between the rotor 2 and the stator 3, so that the pulp is dissociated by the blades provided therein. It is required to be surely dissociated. In order to efficiently dissociate the pulp, for example, Patent Document 1 describes a device for mechanically processing a high-concentration fiber material as a device for mechanically processing a high-concentration fiber material, which is relative to each other. At least two movable processing tools are provided, (a) each of which has one substantially rotationally symmetric substrate and is arranged coaxially with each other, (b) processing. The tool has teeth arranged in an annular row concentric with the center, gaps are located between the teeth, and the gaps depend on the fibrous material to be processed. It forms a free cross section that can flow, (c) the processing tool has an annular empty space between the dentitions, and (d) at least one dentition of one processing tool. In the form in which the processing tools are positioned with each other so as to plunge into one annular empty space of another processing tool, the gap between adjacent teeth that can be flushed by the fibrous material is: Configurations, each with a different length, are disclosed.

Further, in Patent Document 2, as an unraveling machine aimed at increasing the disengaging capacity, a case having a raw material inlet and an unraveling outlet and an internal passage connecting the raw material inlet and the unraveling outlet, and a case of this. -A rotating body rotatably supported in the sing, a rotating portion provided in the passage and attached to the tip of the rotating body, and having an uneven shape on both sides, and the rotating portion so as to cover the rotating portion. The casing is formed, and the concave-convex shape fixing portion provided on both sides of the rotating portion, which is the inner wall of the casing, facing the concave-convex shape, and both sides of the rotating portion are the raw materials. It is composed of a first concavo-convex rotating portion located on the side close to the inlet and a second concavo-convex rotating portion located on the side far from the raw material inlet, and the fixed portion faces the first concavo-convex rotating portion. It is composed of a first unevenness fixing portion and a second unevenness fixing portion facing the second unevenness rotating portion, and the concave portion of the first unevenness rotating portion is fixed to the first unevenness in the passage. A first passage formed by positioning the convex portion of the first unevenness rotating portion in the convex portion of the portion with a gap in the concave portion of the first unevenness fixing portion, and the second unevenness. The concave portion of the rotating portion is formed in the convex portion of the second unevenness fixing portion, and the convex portion of the second unevenness rotating portion is formed in the concave portion of the second unevenness fixing portion with a gap. A second passage is provided, and a recess of the rotating body is formed at the tip of the rotating body, the opening of the recess of the rotating body and the opening of the raw material inlet face each other, and the tip of the rotating body has a recess. A rotating body passage that communicates with the opening of the recess of the rotating body and the second passage is formed, and the papermaking raw material that has flowed in from the raw material inlet is divided into the first passage and the second passage, and the second passage is used. When the papermaking raw material in the passage 1 passes through the gap between the first uneven rotating portion and the first uneven fixing portion, the first uneven rotating portion and the first uneven fixing portion are separated from each other. When the papermaking raw material in the second passage passes through the gap between the second uneven rotating portion and the second uneven fixing portion, the second uneven rotating portion and the second uneven fixing portion are used. The configuration that is dissociated in is disclosed.

Japanese Unexamined Patent Publication No. 09-170184 Japanese Unexamined Patent Publication No. 10-21260

In the breaker, in order to apply a shearing force to the papermaking raw material, the load of rotation of the rotor on the stator becomes large, and the electric power at the time of operation becomes large. The inventor made various trials and found that the blade of the ring on the outer peripheral side having the highest peripheral speed had the highest fiber dissociation efficiency. Therefore, it is an object of the present invention to provide a dissociation machine for improving energy efficiency by saving power by utilizing the high efficiency of dissociation by the blade of the ring on the outer peripheral side.

As a technical means for achieving the above object, the dissociator according to the present invention includes a rotor that rotates about the center of the rings having blades formed on the side surfaces of a plurality of rings arranged on concentric circles. A stator having blades formed on the side surfaces of a plurality of rings arranged concentrically around the rotation axis of the rotor is provided, and the surfaces of the blades are arranged so as to face each other, and the rotor is rotated. In a dissociation machine that dissociates pulp fibers while moving the papermaking material supplied to the center of the rotor to the outer periphery , one or more of the plurality of rings of the stator is removed. There is.

By removing the ring of the stator, the load applied to the rotation of the rotor is reduced, so that the electric power required for the rotation of the rotor can be reduced.
A stirring blade is provided to stir the paper-making raw material that is rotated and supplied around the rotation axis of the rotor, and the circulation that moves the paper-making raw material to the outer peripheral portion is generated by the rotation of the stirring blade. In particular, it is preferable that the external dimensions of the stirring blade be as close as possible to the inner peripheral surface of the ring having the smallest diameter of the rotor.

Further, the disengagement machine according to the second aspect of the present invention is characterized in that the detachable ring is other than the outermost ring.

The inventor has found that the blade of the outermost ring, which has the highest peripheral speed, has the highest dissociation efficiency. Focusing on this finding, we decided to remove the rings other than the outermost circumference of the stator.

Further, the dissociation machine according to the third aspect of the present invention is characterized in that the detachable ring is every other ring toward the inner peripheral portion, leaving the outermost peripheral portion.

Centrifugal force is applied to the papermaking raw material supplied by the rotation of the rotor to generate a circulation for moving in the outer peripheral direction. Since the papermaking raw material is supplied along the rotation axis of the rotor, it moves in the outer peripheral direction by receiving the centrifugal force due to the rotation of the inner rotor. During this movement, the blade of the ring of the stator promotes disassembly. Therefore, in addition to the outermost ring, the ring located inside is left as the ring for this dissociation.

According to the dissociation machine according to the present invention, since the load on the rotation of the rotor is reduced, the electric power required for the rotation can be reduced and energy saving can be achieved.
In addition, by making the external dimensions of the stirring blade as close as possible to the inner peripheral surface of the ring with the smallest diameter of the rotor, the stirring effect of the stirring blade is improved, and by generating a large centrifugal force, the dissociation property is improved. Can be planned.

Further, according to the dissociation machine according to the second aspect of the present invention, it is possible to reduce the power consumption and suppress the decrease in the disassembly efficiency.

Further, according to the disassembly machine according to the third aspect of the present invention, the disassembly efficiency can be maintained.

It is a front view which shows the outline of the rotor of the dissociation machine which concerns on this invention. It is a front view which shows the outline of the stator of the dissociation machine which concerns on this invention. It is a front view which shows a part of a rotor enlarged. It is the front view which shows the part of the stator enlarged. It is a front view which shows the outline of the stirring blade which concerns on this invention. It is a figure explaining the dissociation machine suitable for carrying out this invention, and shows the schematic structure of the horizontal dissociation machine, and shows the state which the stator is open to the rotor. It is sectional drawing which shows the part of the blade of a stator and a rotor enlarged. It is a table which compares and confirms the influence of the pulp strength which was dissociated by the conventional dissociator and the dissociator by this invention. It is a figure which shows the rotor of the conventional dissociation machine, and is the front view corresponding to FIG. It is a figure which shows the stator of the conventional dissociation machine, and is the front view corresponding to FIG. It is a figure which shows the conventional stirring blade, and is the front view corresponding to FIG.

Hereinafter, the dissociation machine according to the present invention will be specifically described based on the preferred embodiment shown.

FIG. 1 shows a front view of the rotor 10 used in the dissociator according to the present invention, in which a plurality of rings having blades formed on the side surfaces thereof are arranged concentrically. The rotor 10 is formed by attaching four rings to the disk 11 in the order of the first ring 10a, the second ring 10b, the third ring 10c, and the fourth ring 10d from the inside. A stirring blade 12 is provided around the rotation axis of the disk 11, and the external dimensions of the stirring blade 12 are shown in FIG. 1 as compared with the external dimensions of the conventional stirring blade 4 shown in FIGS. 9 and 11. As shown, it is enlarged to approach the inner surface of the inner first ring 10a.

Further, FIG. 3 is an enlarged front view showing a part of the rotor 10, in which the blade of the first ring 10a of the rotor 10 is tilted from the radial direction of the rotor 10, and the blade is swiveled by the rotation of the rotor 10. The force acts to accelerate the papermaking raw material in the tangential direction of the rotor 10.

Further, FIG. 2 shows a front view of the stator 15 used in the disengagement machine according to the present invention. The stator 15 has the first ring 3a and the third ring 3c of the rings 3a, 3b, 3c, and 3d provided in the conventional stator 3 shown in FIG. 10 removed. That is, in this stator 15, the outer ring 15b corresponding to the fourth ring 3d and the inner ring 15a corresponding to the second ring 3b, which are located on the outermost periphery of the conventional one, are attached to the disk 16. be. In this embodiment, the inner ring 15a is attached, but the inner ring 15a may be removed as long as the outer ring 15b on the outermost peripheral side is attached. This is the focus of the inventor of the present application on the fact that the outer ring 15b, which is a ring having a blade having a maximum peripheral speed, has the highest fiber dissociation efficiency.

Further, as shown in FIG. 7, the blades of the rotor 10 and the stator 15 are linked to each other in the direction in which the cutting edges face each other, and the tip surface of the blade of the rotor 10 and the surface of the disk 16 of the stator 15 The gap G in the above was set to about 0.7 mm. In the case of the conventional rotor 2 and the stator 3, this gap was set to about 1.2 mm, but in the present invention, this gap can be reduced by reducing the ring of the stator 15. This made it possible to improve the dissociation efficiency.

The operation of the dissociator according to the present invention configured as described above will be described below.

Centrifugal force is applied to the papermaking raw material supplied from the supply port 1a while being agitated by the stirring blade 12 of the rotating rotor 10. Circulation is generated by this centrifugal force, and the papermaking raw material gradually moves in the outer peripheral direction by this flow of circulation. During this movement, the pulp fibers are dissociated while passing between the blades of the rings 10a, 10b, 10c, 10d, 15a, and 15b of the rotor 10 and the stator 15, respectively. At this time, the tilt of the blade of the first ring 10a of the rotor 10 applies a force in the tangential direction of the rotor 10 to the papermaking raw material, and together with the centrifugal force of the stirring blade 12, good circulation is generated to generate paper. The raw materials can be moved smoothly.

Further, the number of blades of the ring rings 10a, 10b, 10c, 10d, 15a, and 15b increases toward the outer peripheral side of both the rotor 10 and the stator 15, so that the pulp fibers are gradually dissociated from the papermaking raw material. Will proceed to. In particular, when passing through the blade of the outer ring 15b of the stator 15, it can be efficiently dissociated.

Then, the dissociated pulp fibers are discharged from the discharge port 1b and fed to the next step.

FIG. 8 shows a table for confirming the influence of pulp strength by comparing the strength of the pulp fiber produced by the disintegrator according to the present invention with the strength of the pulp fiber produced by the conventional disintegrator 1. As shown in this table, there is almost no effect on the quality of the pulp produced by the disintegrator according to the present invention. Moreover, when comparing the power consumption, when processing pulp liquid with a pulp concentration of 3.17% at 3000 rpm in a dismantling machine with 0.8 mm slits and 70 slits, the processing flow rate is 27.6 cubic meters and 54.5 Kw in the case of the conventional dismantling machine 1. A load was applied and power consumption of 56.1Kw / ADT was required per ton of air-dried pulp, whereas in the case of the disintegrator according to the present invention, a processing flow rate of 27.8 cubic meters and a load of 29.7Kw were applied, and per ton of air-dried pulp was applied. It was confirmed that the power consumption could be suppressed by about 46% by requiring only 30.3Kw / ADT power. When a sheet of the produced pulp slurry was hand-made and observed, it was confirmed that no undissociated raw material existed.

According to the dissociation machine according to the present invention, since the stator ring is removed, the load applied to the rotation of the rotor can be reduced, and the electric power required for the rotation of the rotor can be reduced, which contributes to energy saving when the dissociation machine is operated. do.

10 rotor
10a 1st ring
10b 2nd ring
10c 3rd ring
10d 4th ring
11 disk
12 Stirring blade
15 Stator
15a inner ring
15b outer ring

Claims (3)

A rotor that rotates around the center of the ring with blades formed on the side surfaces of each of the plurality of rings arranged on the concentric circles, and the side surfaces of the plurality of rings arranged on the concentric circles around the rotation axis of the rotor. A stator having blades formed therein is provided, and the surfaces of these blades are arranged so as to face each other, and the rotor is rotated to move the papermaking raw material supplied to the center of the rotor to the outer peripheral portion while moving the pulp fibers to the outer peripheral portion. In the disengagement machine
A dissociator comprising removing one or more of the plurality of rings of the stator. The dissociation machine according to claim 1, wherein the removing ring is a ring other than the outermost ring. The dissociation machine according to claim 1, wherein the removing ring is provided every other ring toward the inner peripheral portion while leaving the outermost peripheral portion.

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