JP2789028B2 - A method of grinding and granulating waste paper and a grinder used in this method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for grinding and granulating waste paper, which is waste, in order to effectively reuse the waste paper, and an apparatus used for the method.

[0002]

2. Description of the Related Art Waste paper can be granulated and used effectively. For example, granulated waste paper can be used as fuel. Further, a panel having excellent heat insulating properties can be manufactured by molding into a plate shape. Further, it can be added to manure and the like to be used as a water conditioning material.

[0003] In waste treatment plants, vast amounts of waste paper are separated from other waste. Methods for separating waste paper from industrial waste have already been developed. In order to effectively use waste paper separated by this method, a granulation technique has been eagerly desired. In order to granulate the used paper, it may be crushed and combined into granules. As a method for crushing waste paper, a hammer crusher or a pin mill crusher that mechanically taps and crushes waste paper is used.

In the crushing method using these crushers, pure paper can be crushed, but paper having plastic or aluminum foil laminated on the surface cannot be crushed efficiently. Broken or broken paper generated in a paper mill or the like can be crushed by this method because it is pure paper. However, paper separated as industrial waste includes not only pure paper but also paper having various surfaces laminated on the surface. For example,
The paper used for the huge amount of paper packs and paper diapers,
Plastic is mixed.

[0005] For example, when a paper mixed with plastic is crushed by a pin mill type crusher, the mixed plastic is melted by heat generation, and a screen for selecting the crushed paper is clogged, thereby increasing efficiency. It cannot be crushed well. For this reason, there is a drawback that waste paper, which is waste containing various materials, cannot be efficiently crushed.

[0006] This disadvantage can be solved by crushing the used paper using a shredder for cutting the paper into small pieces with a blade. Since the shredder cuts the paper with a blade, the shredder can crush small waste paper laminated with plastic or metal foil. However, waste paper crushed by this method has a drawback that it is difficult to granulate thereafter. This is because the pulp fibers do not protrude to the surface, so that the pulp fibers cannot be entangled and granulated.

[0007] Further, a technology for converting waste paper into a raw paper pulp using the raw material has already been developed. This method uses a kneader to process broken paper or waste paper generated in a paper mill into waste paper pulp. Further, there is a method using a pulper or a refiner. However, these methods use waste paper, which is industrial waste that is inseparable due to the mixture of various things.
Pulp fibers cannot be made efficiently and at low cost. It is extremely important how waste paper generated as industrial waste can be crushed and granulated at low cost. This is because economical reasons are the biggest obstacles to the effective use of waste.

[0008]

The present inventor has developed a waste paper mill having the structure shown in FIG. 1 in order to solve these disadvantages. The crusher includes a screw conveyor 2 for feeding the supplied waste paper and a grinding cylinder 4 for grinding the waste paper fed by the screw conveyor 2.
And a rotating member 5 disposed inside the grinding cylinder 4. This grinder presses and grinds waste paper supplied by the screw conveyor 2 into the paper flotation gap 6A between the rotating member 5 and the grinding cylinder 4. The method of grinding used paper with a grinder can also grind waste paper laminated with plastic or metal foil. However, this method requires the use of a very large apparatus for grinding the used paper, consumes a large amount of energy, and cannot efficiently and efficiently use the used paper at low cost. For this reason, when used paper is granulated using this attritor, there is a disadvantage that the production cost is increased.

Further, the grinding machine having this structure has a drawback that the used paper to be fed is easily clogged while being fed from the screw conveyor 2 to the paper web gap 6A. When waste paper is jammed here, the waste paper sent one after another from the screw conveyor 2 is in an extremely strongly pressed state,
There is a disadvantage that it takes a lot of trouble to remove. that is,
This is because both the cylinder of the screw conveyor 2 and the grinding cylinder 4 are opened to remove the tightly packed waste paper. For this reason, the method of grinding and granulating waste paper with a grinder of this structure also has a drawback that it is difficult to produce easily and efficiently.

The present invention has been developed for the purpose of further solving such drawbacks. An important object of the present invention is to provide various kinds of materials in which plastics and the like are mixed and plastics adhere to the surface. An object of the present invention is to provide a method of milling and granulating waste paper that can be efficiently and inexpensively granulated using waste paper, and a grinding machine used in this method.

[0011]

According to a first aspect of the present invention, there is provided a method of milling waste paper by a step of grinding waste paper and a step of granulating the ground waste paper. A method of granulating, characterized by grinding used paper as follows. In the granulation method of the present invention, waste paper is
And a rotating member 5 rotating inside the grinding cylinder 4
The waste paper is dropped by its own weight in the grinding gap 6, and is forcibly transported by the forcible drawing ridges 9 provided on the surface of the rotating member 5 to form the cotton. The waste paper transferred to the milling gap 6 is provided between the forced ridges 9.
And at the same time, it is supplied to a guide groove 10 which is formed deeply above and shallowly below. The used paper supplied to the milling gap 6 is stored in a storage pocket 10 provided above the guide groove 10.
Transferred downward from A. The used paper conveyed downward is crushed by a narrow napping gap 6A provided between the forced drawing ridge 9 and the crushing cylinder 4 and turned into staple paper. Further, the discharge amount is restricted by a narrow ring slit 6B provided at the lower end of the grinding gap 6, and the waste paper that has been ground and turned into cotton is discharged. Waste paper that has been made into cotton can be granulated by tangling pulp fibers.

Further, according to the method of the present invention, waste paper is supplied to a grinding gap 6 between a grinding cylinder 4 and a rotating member 5 rotating inside the grinding cylinder 4. In addition, the used paper is dropped by its own weight in the grinding gap 6, and is forcibly transported by the forcible drawing ridge 9 provided on the surface of the grinding cylinder 4 to be turned into cotton. The used paper transferred to the milling gap 6 is supplied to the guide groove 10 which is provided between the forcedly drawn ridges 9 and formed deeply upward and deeply and shallowly below. The used paper supplied to the milling gap 6 is transported downward from a storage pocket 10 </ b> A provided above the guide groove 10. The used paper conveyed downward is crushed and converted into a cotton by a narrow paper-closing gap 6A provided between the outer surface forced retraction ridge 9 and the outer surface of the rotating member 5. Further, the discharge amount is restricted by a narrow ring slit 6B provided at the lower end of the grinding gap 6, and the waste paper that has been ground and turned into cotton is discharged. Waste paper that has been made into cotton can be granulated by tangling pulp fibers.

A crusher according to a third aspect of the present invention is a crusher for crushing supplied waste paper into a state capable of being granulated.
And grinding means 3 for crushing and grinding the supplied waste paper. The grinding means 3 includes a grinding cylinder 4 having a grinding opening 7 at the center, and a rotating member 5 arranged in the grinding opening 7 of the grinding cylinder 4. Between the rotating member 5 and the grinding opening 7, there is provided a grinding gap 6 for crushing and discharging used paper falling under its own weight. Further, the grinding cylinder 4 and the rotating member 5 are arranged vertically so that the waste paper supplied above is dropped while being ground by the grinding gap 6 and discharged. I have. On the outer peripheral surface of the rotating member 5, a plurality of forced retraction ridges 9 are provided.
Is provided. A guide groove 10 is provided between adjacent forced pull-in ridges 9. The outer peripheral surface 9A of the forced retraction ridge 9 approaches the inner surface of the crushing opening 7 and forms a gap 6A between the crushing opening 7 and the crushing opening 7. Further, the guide groove 10 is formed deeper and deeper in the upper part, and has a storage pocket 10A in the upper part of the grinding gap 6 and a narrow ring slit 6B in the lower part.
Is formed. Furthermore, the forced retraction ridges 9 are inclined in a direction in which the used paper in the grinding gap 6 is forcibly transferred downward when the rotating member 5 is rotated. The waste paper supplied to the grinding gap 6 falls into the guide groove 10 by its own weight, the discharge amount of the falling waste paper is restricted by the narrow ring slit 6B, and the outer peripheral surface 9A of the forced drawing ridge 9 is ground. It is configured so as to be crushed and discharged in a paper filing gap 6 </ b> A provided between the cylinder 4 and the inner surface of the cylinder 4.

Still further, according to claim 4 of the present invention.
The crusher has a plurality of forced ridges 9 on the inner surface of the crushing opening 7 of the crushing cylinder 4. A guide groove 10 is provided between adjacent forced pull-in ridges 9. The inner peripheral surface 9B of the forced retraction ridge 9 approaches the rotating member 5, and the rotating member 5
A gap 6A is formed with the outer periphery of the paper web. Further, the guide groove 10 is formed deeper and deeper in the upper part, forming a storage pocket 10A in the upper part of the grinding gap 6 and a narrow ring slit 6B in the lower end part. Furthermore,
The forced retraction ridge 9 is inclined in a direction in which the used paper in the grinding gap 6 is forcibly transferred downward when the rotating member 5 is rotated. The used paper supplied to the grinding gap 6 is guided by the guide groove 1 by its own weight.
0, the amount of waste paper to be dropped is restricted by the narrow ring slit 6B, and the inner peripheral surface 9 of the forcible drawing ridge 9 is restricted.
It is configured so as to be crushed and discharged at a paper filing gap 6A provided between B and the outer surface of the rotating member 5.

[0015]

According to the method of the present invention, waste paper is crushed and made into paper as described below. The supplied waste paper is supplied to a grinding gap 6 between the rotating member 5 and the grinding cylinder 4. The used paper in the grinding gap 6 is transported downward while falling by its own weight, and is also forcibly transported downward by the inclined forced retraction ridge 9. Most of the used paper falling through the grinding gap 6 is supplied to the guide groove 10. The used paper falling in the guide groove 10 is rotated by the rotation of the rotating member 5 so that the guide groove 1
From 0, it is sent to the papermaking gap 6A. Since the gap 6A is a considerably narrow gap, the used paper is crushed and ground here. The used paper ground in the paper filing gap 6A is transferred to the guide groove 10 again from the paper filing gap 6A. In other words, the waste paper supplied to the milling gap 6 is gradually reduced and milled and made into cotton while being transferred from the guide groove 10 to the paper-making gap 6A and from the paper-making gap 6A to the guide groove 10, and has its own weight. Is dropped.

The guide groove 10 for dropping the used paper downward is
It becomes shallower toward the lower part and forms a narrow ring slit 6B at the lower end of the grinding gap 6. Narrow ring slit 6
B limits the amount of waste paper that falls while being ground. Since the narrow ring slit 6B is a narrow gap,
It prevents the discharge of waste paper that is not sufficiently ground, and also limits the amount of waste paper that has been ground. Used paper whose discharge is restricted is repeatedly moved back and forth between the guide groove 10 and the papermaking gap 6A, and is further finely ground. Therefore, when the gap between the narrow ring slits 6B is narrowed, the amount of waste paper discharged is reduced, and the discharged waste paper can be ground smaller.
Conversely, if the gap between the narrow ring slits 6B is widened,
The discharge capacity can be increased to increase the processing capacity per hour.
The interval between the narrow ring slits 6B is adjusted to an optimum value in consideration of the type of used paper to be processed and the required degree of attrition.

Since innumerable pulp fibers protrude from the outer periphery of the used paper, the pulp fibers are entangled and granulated. The method of granulating by entanglement of pulp fibers can efficiently granulate waste paper converted into cotton without using a binder or using a small amount of a binder.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. However, the embodiment described below is an example of a method of grinding and granulating waste paper for embodying the technical idea of the present invention, and a waste paper granulator used in this method, The present invention does not specify the granulation method and apparatus as follows.

Further, in this specification, in order to make it easy to understand the claims, the numbers corresponding to the members described in the embodiments will be referred to as “claims” and “ In the column of “Means of the above”. However, the members described in the claims are not limited to the members of the embodiments.

FIG. 2 shows a used paper mill. This mill grinds waste paper on which plastics such as polyethylene or metal foils such as aluminum are laminated or unlaminated waste paper into cotton. The crusher shown in this figure includes crushing means 3 for converting waste paper into cotton. The grinding means 3 includes a grinding cylinder 4 and a rotating member 5. The grinding cylinder 4 is cylindrical and has a grinding opening 7 for grinding used paper and discharging it from the lower end.
Is open. The grinding opening 7 has a columnar shape, and has a large number of narrow grooves 8 provided on the inner surface of the inner surface thereof, as shown in an enlarged view in FIG. The narrow groove 8 is preferably designed to have a width of about 5 mm and a depth of about 3 mm. However, the narrow groove 8 has, for example, a width of 1 to 15 mm and a depth of 1 to 1
It can be 0 mm. As shown in the enlarged sectional view of FIG. 2, the grinding cylinder 4 shown in FIG. 2 gradually narrows the narrow groove 8 toward the lower end, and has a narrow ring slit 6B provided at the lower end of the grinding opening 7. The narrow groove 8 is not extended. However, as shown in the enlarged cross-sectional view of FIG. 4, the narrow groove 8 can extend the lower end to the narrow ring slit 6B. The device that extends the narrow groove 8 to the narrow ring slit 6B can increase the amount of waste paper milled by the narrow groove 8. In order to extend the narrow groove 8 to the narrow ring slit 6B and reduce the amount of waste paper discharged, the width of the narrow ring slit 6B is reduced. In the apparatus shown in FIG. 4, the groove is made shallow at the lower end of the narrow groove 8, but the depth may be the same up to the lower end. However, the narrow groove 8 having the same depth up to the lower end is designed to be shallow.

The rotating member 5 is disposed coaxially with the cylindrical grinding cylinder 4 in a posture perpendicular to the grinding opening 7 of the grinding cylinder 4. FIG. 2 is a cross-sectional view, FIG. 3 is a plan view, and FIG. 5 is a perspective view of the rotating member 5. The rotating member 5 shown in these figures guides the supplied waste paper into the guide groove 10, and discharges the waste paper while grinding along the guide groove 10 while grinding it with the forced drawing ridge 9.

The rotating member 5 grinds the supplied waste paper while dropping it down. The rotating member 5 has four forced retraction ridges 9 extending in the radial direction.
A guide groove 10 is provided therebetween. As shown in FIGS. 2 and 5, the guide groove 10 has a deeper upper portion to form a storage pocket 10A and a lower lower portion so that the supplied waste paper can be smoothly guided and efficiently milled. . In order to make the guide groove 10 deeper in the upper part, the rotating member 5 has a conical shape as a whole and is provided with a forced pulling ridge 9 on the outer periphery. The rotating member 5 of this shape is provided between the forced retraction ridges 9.
Guide groove 1 deeper at upper part and gradually shallower toward lower part
0 is formed. The guide groove 10 is provided with a storage pocket 10A at an upper portion, and a lower end thereof is connected to a narrow ring slit 6B having a small width as shown in an enlarged sectional view of FIG.

The used paper dropped into the storage pocket 10A of the guide groove 10 is forcibly pulled in by the rotation of the rotating member 5. Therefore, as shown in FIG. 5, the forced retraction ridges 9 are inclined with respect to the downward gradient in the direction opposite to the rotation direction of the rotating member 5. Rotating member 5 shown in FIG.
Rotates left as indicated by the arrow to grind the used paper.

The inclination angle of the forced retraction ridge 9 with respect to the rotation axis determines the state of the used paper falling from the forced retraction ridge 9 being pulled. If the inclination angle is large, the action of drawing in the used paper becomes strong. Conversely, when the inclination angle is small, the effect of drawing in the used paper is reduced. The angle of inclination formed by the forced retraction ridge 9 with the rotating shaft 12 of the rotating member 5 is preferably designed in the range of 10 to 60 degrees, more preferably 12 to 50 degrees.

The outer peripheral surface 9A of the forced retraction ridge 9 approaches the inner surface of the grinding opening 7 of the grinding cylinder 4, and a paper is formed between the inner surface of the grinding opening 7 and the outer peripheral surface 9A of the forced retraction ridge 9. Cotton gap 6
Form A. The used paper supplied to the storage pocket 10A of the guide groove 10 is crushed and made into paper when passing through the papermaking gap 6A and the narrow ring slit 6B. The used paper supplied to the guide groove 10 is ground while being transferred from the guide groove 10 to the papermaking gap 6A and from the papermaking gap 6A to the guide groove 10, and is gradually transferred downward. After being transferred to the lower part of the guide groove 10, it passes through a narrow ring slit 6 </ b> B provided at the lower end of the grinding gap 6, is further ground when passing, and is discharged from the grinding gap 6.
The interval between the paper-wasting gap 6A and the narrow ring slit 6B is preferably 0.3 to 2.5 mm, and more preferably 0.4 to 2.5 so that the used paper can be efficiently and sufficiently ground.
It is set in the range of 2.0 mm. The optimum distance between the paper-wasting gap 6A and the narrow ring slit 6B varies depending on the type of used paper and the required degree of attrition. For example, in a crusher for converting a telephone directory into a cotton sheet and grinding the gap, the gap between the cotton sheet gap 6A and the narrow ring slit 6B is set to about 1.0 to 2.0 mm.
A mill for converting a laminated paper such as a milk pack into a cotton wool is used.
Set to 7 to 2.0 mm.

The rotating member 5 has a rotating shaft 12 fixed at the center. The rotating shaft 12 is connected to the base 11 via a bearing 13.
It is supported vertically. A sprocket 14 is fixed to a lower end of the rotating shaft 12. The sprocket 14 is connected to a sprocket 17 of a motor 16 via a timing belt 15. The motor 16 is a speed change motor and adjusts the rotation speed of the rotating member 5 to an ideal rotation speed. The ideal rotation speed of the rotating member 5 varies depending on the radius of the rotating member 5. When the outer diameter of the rotating member 5 is 360 mmφ, the ideal rotation speed of the rotating member 5 is about 450 rpm.
However, the rotation speed of the rotating member 5 is set to 250 to 600 rpm.
, Various kinds of waste paper can be ground.

Further, the grinding machine shown in FIG.
The discharge vanes 18 are disposed below the bottom. Discharge blade 18
Is fixed to the upper surface of the disk 19. The discharge blade 18 is rotated by a disk 19. The discharge blade 18 extends in the radial direction from the rotation shaft 12 of the rotation member 5 and is curved in a direction to retract with respect to the rotation direction as shown in FIG. The discharge blade 18 rotates at a high speed, accelerates the waste paper made into cotton from the grinding gap 6 in the circumferential direction, and vigorously discharges the waste paper from a discharge port opened tangentially below the grinding cylinder 4.

In the above embodiment, the forcible drawing ridge 9 and the guide groove 10 are provided on the surface of the rotating member 5. As shown in the sectional view of FIG. 6 and the plan view of FIG. 7, the grinding machine can also be provided with a forced drawing ridge 9 and a guide groove 10 in the grinding opening 7 of the grinding cylinder 4. 2 and 3, the grinding machine shown in these figures is provided with a fine groove 8 on the rotating member 5 and a forced drawing ridge 9 and a guide groove 10 on the grinding cylinder 4. I have. The narrow groove 8 is provided to extend in the axial direction of the rotating member 5 as in the device shown in FIGS. 2 and 3. The width, depth, and structure of the lower end of the narrow groove 8 can be designed in the same manner as in the apparatus shown in FIGS.

In the milling machine shown in FIG. 6, when the rotating member 5 is rotated, the supplied waste paper is ground while being dropped downward by the forced drawing ridges 9. The forced retraction ridges 9 of the grinding cylinder 4 are provided on the inner surface of the grinding opening 7 so as to extend in the radial direction, and a guide groove 10 is provided between the forced retraction ridges 9. As shown in FIG. 6, the guide groove 10 is formed deep in the upper part and shallow in the lower part so that the supplied waste paper can be smoothly guided and efficiently crushed. In order to make the guide groove 10 deeper upward, the grinding cylinder 4 is provided with a forced drawing ridge 9 projecting from the inner surface of the grinding opening 7 so that the overall shape of the grinding opening 7 is formed in a conical shape whose inner diameter increases upward.
The grinding cylinder 4 of this shape has a guide groove 10 formed between the forced retraction ridges 9 that is deeper upward and gradually becomes shallower downward. The lower end of the guide groove 10 is a narrow ring slit 6B having a small width as shown in the enlarged sectional view of FIG.

The used paper dropped into the guide groove 10 is forcibly pulled in by the rotation of the rotating member 5. Accordingly, as shown in FIG. 7, the forced retraction ridges 9 of the grinding cylinder 4 are inclined downward in the direction of rotation of the rotating member 5. The rotating member 5 shown in FIG. 7 rotates to the left as shown by the arrow to grind the used paper.

The inclination angle of the forced retraction ridge 9 with respect to the rotating shaft 12 is designed in the same manner as in the apparatus shown in FIGS.

The inner peripheral surface 9 B of the forced retraction ridge 9 approaches the outer peripheral surface of the rotating member 5, and a gap formed between the outer peripheral surface of the rotating member 5 and the inner peripheral surface 9 B of the forced retraction ridge 9. 6A. The used paper supplied to the guide groove 10 is made into a paper cotton gap 6A.
And the narrow ring slit 6B, they are crushed and ground. Waste paper supplied in the guide groove 10, the Kamiwata of gaps 6A from the guide groove 10, is transferred gradually downward is triturated want such transferred from Kamiwata of gaps 6A in the guide groove 10. After being transferred to the lower part of the guide groove 10, it passes through a narrow ring slit 6B provided at the lower end of the grinding gap 6, and is further ground when passing therethrough.
Is discharged from The spacing between the papermaking gap 6A and the narrow ring slit 6B is designed in the same manner as in the apparatus shown in FIGS.

The grinding cylinder 4 and the rotating member 5 can cool the grinding cylinder 4 and the rotating member 5 to lower the grinding temperature. In the apparatus shown in FIGS. 2 and 6, a cooling cavity 20 is provided in the rotating member 5 and the grinding cylinder 4. Cooling water is circulated through the cavity 20.

In order to circulate the cooling water through the cavity 20, the rotary member 5 has a rotary joint 22 connected to the lower end of the rotary shaft 12. The cavity 20 of the rotating member 5 has a circulation path 21 opened at the center of the rotating shaft 12.
Through a rotary joint 22.
The rotating shaft 12 has a built-in double-tube circulation path 21. The double pipe of the rotating shaft 12 is connected to the inflow side and the discharge side of the cavity 20. The circulation path 21 of the double pipe is connected via a rotary joint 22 to a cooling water inflow path and a cooling water inflow path. Cavity 20 of grinding cylinder 4
Are connected to the inlet and outlet of the cooling water. The cold water supplied from the cooling water inflow passage circulates through the rotating member 5 and the cavity 20 of the grinding cylinder 4 to cool the rotating member 5 and the grinding cylinder 4.

Further, in the grinding machine shown in FIGS. 2 and 6, the grinding cylinder 4 is arranged upright. A vertical milling cylinder can supply waste paper to the milling gap most efficiently. However, it goes without saying that the grinding cylinder can be arranged slightly inclined from the vertical position. Therefore, in the present specification, the expression that the grinding cylinder is vertically disposed includes a state in which the grinding cylinder is disposed substantially vertically.

Further, the attritor shown in FIGS. 2 and 6
Although the forced retraction ridge 9 is provided on either the grinding cylinder 4 or the rotating member 5, the forced retraction ridge 9 may be provided on both surfaces of the grinding cylinder 4 and the rotating member 5. Although not shown, the grinding machine in which a plurality of forced retraction ridges are provided on the surfaces of the grinding cylinder 4 and the rotating member 5 has a guide provided between the plurality of forced retraction ridges instead of providing a narrow groove. The waste paper is stored in the groove and discharged while crushing the waste paper in the grinding gap between the outer peripheral surface of the forced retracting ridge provided on the rotating member and the inner peripheral surface of the forced retracting ridge provided on the grinding cylinder. I do.

The used paper that has been made into cotton by the attritor is granulated by the granulator 23 shown in FIG. In the granulator 23 shown in this figure, the trommel 24 is disposed at a slightly downward slope with respect to the horizontal plane. The trommel 24 is rotatably supported,
The motor rotates by being connected to a motor (not shown).

The granulator 23 supplies the waste paper converted into cotton to one end of the rotating trommel 24 and granulates it. The used waste paper 1 is supplied in a state of containing water. When supplying the waste paper 1 which has been made into cotton without containing moisture, the trommel 24 is sprayed with moisture. Trommel 24
The waste paper 1 made into a cotton wool is supplied into the trommel 24.
It is rotated and granulated inside. That is, the waste paper 1 that has been made into the cotton is entangled with each other and granulated while being rolled inside the trommel 24. The waste paper 1 that has been granulated and turned into cotton waste becomes a waste paper grain 1A . Waste paper grain
The particle size of 1A is determined by the rotational speed, diameter, total length,
It can be adjusted by the inclination angle. The particle size of the used paper 1A is preferably set in a range of 1 to 10 mm. The granulator 23 having this structure can efficiently granulate the waste paper 1 that has been made into the cotton.

The paper 1 is a paper ischikauia Since the granulated entangle the pulp fiber, it is not always necessary to mix the binder over. However, a binder over mixed waste paper 1 is a paper ischikauia can be solidified so as not to disperse the granulated waste paper granules with binder over.

The present invention does not specify a method and a grinder for granulating waste paper pulverized by a grinder . Recovered waste paper can be granulated using any granulator currently in use or to be developed. For example, as shown in the schematic cross-sectional view of FIG. 9, waste paper 1 converted into cotton is supplied into a cylinder 25, and the waste paper 1 is extruded into a rod shape from a through hole 26 at a lower end by a piston or a roller.
The waste paper extruded from the paper can be cut by the rotating plate 27 and granulated into pellets. According to this method, water and a binder are added to waste paper made into a cotton wool to make the paper easy to move, and the granulation can be performed more efficiently. Used paper granulated by this method is most suitable for fuels and the like because pulp fibers can be tightly bound and the bulk specific gravity can be reduced.

If a binder is blended with the granulated waste paper and pressed by a pressure press machine, a board plate excellent in heat insulation and sound insulation can be manufactured. This board plate can be adjusted to any strength by the level of press load. Furthermore, various fillers and fibers can be kneaded and granulated.For example, using a non-combustible binder such as Portland cement as a binder, it is also possible to produce a fire-resistant, water-resistant non-combustible board. it can. Alternatively, a sandwich plate of the manufactured board and wood or a composite plate of another board can be formed.

[0042]

EFFECTS OF THE INVENTION The method of the present invention for grinding and granulating and the grinder used in this method use an enormous amount of waste paper as waste, efficiently and inexpensively, and use a small amount of binder. And realize the feature that the used paper can be granulated and used effectively. It granulation method and the grinder in the present invention, by dropping the paper by its own weight transported downwards between milling砕隙between grinding cylinder and the rotating member, also forced pull ridges provided between the milling砕隙The guide paper is further forcibly transferred downward, and a guide groove is provided between the forced retraction ridges, and is transferred downward from the upper storage pocket. Grinding is performed in a narrow gap between the inner surface of the cylinder and the paper, and a narrow ring slit is provided at the lower end of the grinding gap to limit the amount of paper discharged. This is because it is easy to granulate the waste paper thus made into cotton.

In particular, the method of turning waste paper into cotton while dropping it under its own weight and forcibly transporting it downward by a forced ridge can make the structure of the attritor extremely simple. In particular,
There is no need to pump waste paper using a screw conveyor or the like as in the related art. For this reason, there is a feature that it can be efficiently crushed with a very simple crusher and made into a cotton wool. In addition, since a large storage pocket can be provided above the grinding gap, waste paper can be pressed into this part and it does not get clogged. is there.

Further, a book for grinding the used paper into a cotton wool by means of a gap between the forced pulling ridge of the rotating member and the grinding cylinder and a narrow ring slit provided at the lower end of the grinding gap. granulation process and grinders invention, the various waste paper which is laminated in plastic and metal foil together can efficiently Kamiwata of, on its outer periphery to project the myriad of pulp fibers. For this reason, there is a feature that the used paper can be granulated with the use amount of the binder reduced or completely eliminated by entanglement of the pulp fibers. When a binder such as plastic is used to granulate waste paper, the production cost increases. Also, when used as a fuel, the binder is also burned together, which can adversely affect the furnace. The used paper granulating method and mill according to the present invention realizes extremely excellent features that can reduce such adverse effects and granulate used paper effectively.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a conventional waste paper attritor.

FIG. 2 is a sectional view showing a used paper mill of the present invention.

FIG. 3 is a partial cross-sectional plan view of the attritor shown in FIG. 2;

FIG. 4 is an enlarged cross-sectional view of a main part of a portion where a rotating member and a narrow groove face a grinder according to another embodiment of the present invention.

FIG. 5 is a perspective view of a rotating member of the grinding machine shown in FIG. 2;

FIG. 6 is a vertical sectional view of a grinder showing another embodiment of the present invention.

FIG. 7 is a plan view of the attritor shown in FIG. 8;

FIG. 8 is a perspective view showing a granulator for granulating waste paper converted into a cotton wool by a grinder.

FIG. 9 is a schematic sectional view showing another granulator for granulating used paper.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Used paper 1A ... Used paper granule 2 ... Screw conveyor 3 ... Milling means 4 ... Milling cylinder 5 ... Rotating member 6 ... Milling gap 6A ... Gap of paper cotton 6B ... Narrow ring slit 7 ... Milling opening 8 ... Narrow groove 9 ... Forced retraction ridge 9A ... Outer peripheral surface 9B ... Inner peripheral surface 10 ... Guide groove 10A ... Storage pocket 11 ... Base 12 ... Rotating shaft 13 ... Bearing 14 ... Sprocket 15 ... Timing belt 16 ... Motor 17 ... Sprocket 18 ... discharge blade 19 ... disc 20 ... cavity 21 ... circulation path 22 ... rotary joint 23 ... granulator 24 ... trommel 25 ... cylinder 26 ... through hole 27 ... rotary plate

Claims (4)

(57) [Claims] 1. A method for grinding and granulating waste paper, comprising the steps of grinding waste paper and granulating the ground waste paper into granules, wherein the waste paper is milled with a grinding cylinder (4). , This grinding cylinder (4)
The grinding paper (6) is supplied to the grinding gap (6) between the rotating member (5) that rotates inside the paper, the used paper is dropped by its own weight in the grinding gap (6), and the forcing provided on the surface of the rotating member (5). Forcibly transport waste paper that is forcibly transported by the drawing ridge (9) and transported to the grinding gap (6).
It is provided between the recessed ridges (9), and is supplied to a guide groove (10) formed deeply above and deeply shallow at the bottom, and further,
The used paper supplied to the milling gap (6) is transferred downward from the storage pocket (10A) provided at the upper part of the guide groove (10), and the used paper transferred downward is forcibly drawn in ridges (9). And the grinding cylinder (4) are crushed in a narrow paper floss gap (6A) provided between the milling cylinder (4) and the paper floss, and further, a narrow ring slit (6B) provided at the lower end of the grinding gap (6) In addition to restricting the amount of waste paper, the waste paper that has been milled and made into paper is discharged, and the fibers of waste paper that have been made into cotton are entangled and granulated. Method. 2. A method of grinding and granulating waste paper, comprising the steps of grinding waste paper and granulating the ground waste paper into granules, wherein the waste paper is milled with a grinding cylinder (4). , This grinding cylinder (4)
It is supplied to the grinding gap (6) between the rotating member (5) that rotates inside and the waste paper is dropped by its own weight in the grinding gap (6), and provided on the surface of the grinding cylinder (4). Forced ridge
(9) Forcibly transported waste paper that is transported to the milling gap (6) is provided between the forced draw-in ridges (9), and the guide groove ( 10),
Furthermore, the waste paper supplied to the milling gap (6) is
(0) is transported downward from the storage pocket (10A) provided at the upper part, and the waste paper transported downward is converted into a narrow paper cotton provided between the forced drawing ridge (9) and the rotating member (5). The paper was crushed in the gap (6A) and further reduced by the narrow ring slit (6B) provided at the lower end of the crushing gap (6), and the paper was crushed into paper. A method of milling and granulating waste paper, wherein the waste paper is discharged and the fibers of the waste paper converted into cotton are entangled and granulated. 3. Grinding the supplied waste paper so that it can be granulated
A grinder which, grinding means triturated triturated waste paper to be subjected sheet (3) is centered on the friction砕開port and grinding cylinder are open (7) (4), trituration Milling opening of cylinder (4)
(7) a rotating member (5)
Between (5) and the grinding opening (7), there is provided a grinding gap (6) for crushing and discharging waste paper falling under its own weight,
Furthermore, the grinding cylinder (4) and the rotating member (5) are arranged vertically, and the waste paper supplied upward is supplied to the grinding gap.
(6) It is configured to drop while discharging while grinding, and on the outer peripheral surface of the rotating member (5), a plurality of forced retraction ridges (9) are provided, A guide groove (10) is provided between the forced retraction ridges (9), and the outer peripheral surface (9A) of the forced retraction ridge (9) approaches the inner surface of the grinding opening (7), and is ground. Opening (7)
And the guide groove (10) is formed deeper in the upper part and shallower in the lower part.
A storage pocket (10A) is formed in the upper part of (6), and a narrow ring slit (6B) is formed in the lower part.Furthermore, the rotating member (5) is rotated in the forced retraction ridge (9). And grinding gap (6)
Inclined in the direction of forcibly transporting waste paper of
The supplied waste paper falls into the guide groove (10) by its own weight, and the discharge amount of the fallen waste paper is limited by the narrow ring slit (6B), and the outer peripheral surface (9A) of the forced retraction ridge (9) A crusher configured to be crushed and discharged in a papermaking gap (6A) provided between the crushing cylinder (4) and an inner surface of the crushing cylinder (4) . 4. Grinding the supplied waste paper so that it can be granulated
A grinder which, grinding means triturated triturated waste paper to be subjected sheet (3) is centered on the friction砕開port and grinding cylinder are open (7) (4), trituration Milling opening of cylinder (4)
(7) a rotating member (5)
Between (5) and the grinding opening (7), there is provided a grinding gap (6) for crushing and discharging waste paper falling under its own weight,
Furthermore, the grinding cylinder (4) and the rotating member (5) are arranged vertically, and the waste paper supplied upward is supplied to the grinding gap.
(6) The grinding cylinder (4) is configured to be dropped and discharged while grinding.On the inner surface of the grinding opening (7) of the grinding cylinder (4), a plurality of forced retraction ridges (9) are provided. A guide groove (10) is provided between adjacent forced retraction ridges (9), and the inner peripheral surface (9B) of the forced retraction ridge (9) approaches the rotating member (5). do it,
A gap between paper and cotton (6A) is formed with the rotating member (5),
Further, the guide groove (10) is formed deeply deep at the upper part and shallow at the lower part, and a storage pocket (10A) is formed at an upper part of the grinding gap (6), and a narrow ring slit (6B) is formed at a lower end part. Further, the forcibly drawn ridge (9) is inclined in a direction for forcibly transferring the waste paper in the grinding gap (6) downward when the rotating member (5) is rotated, and the supplied waste paper is provided. Falls into the guide groove (10) by its own weight, and the amount of waste paper that falls is reduced by a narrow ring slit (6B)
And at the same time, it is crushed and discharged by a paper flotation gap (6A) provided between the inner peripheral surface (9B) of the forced retraction ridge (9) and the outer peripheral surface of the rotating member (5). Grinding that is configured to be
Machine .