JP2005211888A - Wallpaper shredding system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain fine flakes which contain no foreign matter such as iron pieces and are suitable for recycling by shredding wallpaper. <P>SOLUTION: A wallpaper shredding system is provided with: a first shredder 1 for coarsely shredding the wallpaper; a magnetic separator 3 for removing the iron pieces mingled in the flakes of coarsely shred wallpaper; a second shredder 4 for finely shredding the flakes from which the iron pieces are removed; a tubular connection part 9 which connects the discharging port of the first shredder 1 and the charging port of the second shredder 4 via the magnetic separator 3; and a blower 6 which produces wind force for sending the wallpaper flakes coarsely shred by the first shredder 1 to the second shredder 4 via the connection part 9. By attracting the iron pieces from coarsely shred wallpaper flakes, the iron pieces which has not yet become too small can be easily removed. The flakes are dried by frictional heat produced in the first shredder 1 and wind force of the blower 6 to facilitate separation of the iron pieces from the flakes. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a pulverizing system for wallpaper for finely pulverizing used wallpaper, and is suitable for, for example, pulverizing PVC paper made of a composite material of backing paper and vinyl chloride.

  Conventionally, a wallpaper made of vinyl chloride has been widely used as a wallpaper to be attached to a wall of a house or the like. Such a wallpaper made of vinyl chloride has a vinyl chloride resin layer 103 formed on a paper base 101 called backing paper as shown in FIG. The backing paper 101 formed on such a wallpaper made of vinyl chloride is provided so as not to damage the wall surface when the wallpaper once pasted on the wall surface is peeled off for replacement or the like. That is, when peeling the wallpaper, the backing paper 101 is turned over and peeled off, so that the wallpaper can be peeled without damaging the wall surface.

  By the way, when the above-mentioned vinyl chloride wallpaper is peeled off from the wall surface and disposed, if incineration is performed, dioxins and a large amount of carbon dioxide are generated. Accordingly, the wallpaper made of vinyl chloride that is no longer necessary is merely garbage as industrial waste. For this reason, it is desired that wallpaper made of vinyl chloride be recycled for disposal without being disposed of by incineration or the like while environmental issues are greatly screamed.

  However, when recycling the above-mentioned wallpaper made of vinyl chloride, the peeled wallpaper is in a state in which a part of the backing paper 101 is stuck to the vinyl chloride resin layer 103. In addition, since the vinyl chloride resin layer 103 is infiltrated into the paper fiber of the backing paper 101, it is extremely difficult to completely separate the soaked vinyl chloride resin layer 103 from the backing paper 101. In addition, even if this is possible, a large cost is required. Therefore, it is not practical to use a vinyl chloride wallpaper that has been peeled off for recycling.

As a technique for solving such a problem, as shown in FIG. 7, the applicant of the present invention has a PVC paper layer 102 made of a composite material of vinyl chloride and a paper base material on a backing paper 101 as a base material. The technique to form was invented (refer patent document 1). In the technique described in Patent Document 1, since the layer that has been formed only with the vinyl chloride resin is a composite material of vinyl chloride and the base material used for the backing paper, the wallpaper peeled off from the wall surface is used as wallpaper again. It can be recycled.
Japanese Patent Application No. 2002-105317

When such wallpaper is actually recycled, it is necessary to finely pulverize the wallpaper using a pulverizer. In addition, the size of the crushed pieces called flakes obtained by pulverizing the wallpaper needs to be smaller than a predetermined size in order to facilitate dissolution of the crushed pieces. In order to make the flakes smaller than a predetermined size, in the pulverizer, a technique of providing a screen having a plurality of through holes of a predetermined size between a pulverizing part where the actual pulverization is performed and a casing part for storing the flakes (For example, Patent Document 2). According to the technique described in Patent Document 2, pulverization is performed in the pulverization unit until the size of the through hole provided in the screen becomes smaller, and only the flakes smaller than the predetermined size pass through the through hole and the casing. Stored in the unit.
JP-A-8-183032

  By the way, it is often the case that a new wallpaper is immediately pasted on the wall surface after the PVC paper wallpaper described above is peeled off from the wall surface. As a method of pasting the wallpaper on the wall surface, the wallpaper sheet is cut into an appropriate length by a cutting tool such as a cutter, and the sheets are pasted side by side as shown in FIG. At this time, the wallpaper sheets 51a and 51b adjacent to each other are overlapped with a few centimeters and attached to the wall surface, and a joint is pasted without any gap by a method called cutting and cutting substantially the center (indicated by a one-dot chain line) of the overlapped portion. be able to.

  However, a cutting tool such as a cutter sometimes loses a blade when cutting or cutting the wallpaper sheet. Some cutting devices such as cutters recover the sharpness by folding the tip of the blade when the sharpness deteriorates. Therefore, in order to prevent the operator from being injured by the chipped blade or the folded blade, the chipped blade or the folded blade was intentionally mixed and disposed of.

  When such wallpaper with blades mixed is pulverized by a pulverizer, iron pieces forming the blades of the cutting tool are mixed into the pulverized wallpaper flakes, and the flakes are not suitable for recycling. There was a problem.

  Therefore, it is required to remove iron pieces from the flakes. However, when the wallpaper peeled off from the wall surface is pulverized into flakes smaller than a predetermined size by a pulverizer, the mixed iron pieces are also pulverized and reduced by the pulverizer, so if the iron pieces are mixed in large quantities, they are removed. There was a problem that it couldn't be done. Further, there has been a problem that the flakes of the pulverized wallpaper and the iron pieces mixed in the flakes are strongly bonded to each other by moisture such as glue adhering to the wallpaper, making it difficult to remove the iron pieces.

  The present invention was made to solve such problems, and the wallpaper for recycling can be pulverized into fine flakes suitable for recycling that are not mixed with foreign matters such as iron pieces. The purpose is to provide a system.

  In order to solve the above-mentioned problems, a pulverizing system for wallpaper according to the present invention includes a first pulverizer for coarsely pulverizing wallpaper, a second pulverizer for finely pulverizing flakes of coarsely pulverized wallpaper, A cylindrical connecting portion that connects between the discharge port of the pulverizer and the inlet of the second pulverizer, and wallpaper flakes coarsely pulverized by the first pulverizer through the connecting portion. A blower that generates wind power to be sent to the pulverizer and a magnetic separator that is installed in the middle of the connecting portion and adsorbs iron pieces mixed in the coarsely pulverized wallpaper flakes are provided.

  In another aspect of the present invention, a magnetic separator for adsorbing iron pieces mixed in the flakes of the wallpaper finely pulverized by the second pulverizer is further provided.

  In another aspect of the present invention, the magnetic separator has a plurality of rows arranged in a plurality of rows in the casing on a plane perpendicular to the direction in which the flakes travel, and a casing through which the flakes of pulverized wallpaper pass. And a plurality of rod-shaped magnets arranged in the n-th row (n is an integer of 2 or more) have a direction in which flakes travel. When viewed from the top, the plurality of rod-like magnets arranged in the (n-1) th row are arranged in the gaps.

  In another aspect of the present invention, a cyclone that presses the flakes of the wallpaper finely pulverized by the second pulverizer against the inner wall surface by centrifugal force generated by the air current, and drops the flakes by gravity, A cylindrical second connecting portion for connecting the pulverizer and the cyclone, and a suction device for generating wind power for sending flakes to the cyclone via the second connecting portion and for generating an air current in the cyclone I have to.

  According to the present invention configured as described above, the wallpaper can be crushed into small flakes by the first pulverizer and the second pulverizer. In addition, since the iron pieces are attracted by the magnetic separator to the wallpaper flakes coarsely pulverized by the first pulverizer, the iron pieces to be adsorbed do not become too small. In addition, when the wallpaper is moistened with glue or the like, the flakes are dried by the frictional heat generated when the wallpaper is roughly pulverized by the first pulverizer and the wind force for carrying the pulverized wallpaper flakes. Therefore, flakes and iron pieces can be easily separated. Thereby, the mixed iron piece can be efficiently removed.

  According to another feature of the present invention, the iron pieces are attracted by the magnetic separator to the wallpaper flakes finely pulverized by the second pulverizer, so that the iron pieces that have not been completely removed from the coarsely pulverized wallpaper flakes. Can also be removed. The iron pieces to be removed here are finely pulverized by the second pulverizer. However, since only iron pieces that cannot be completely removed before being finely pulverized are to be removed, most of them can be removed. At that time, when the wallpaper is moistened with glue or the like, the flakes can be further dried by the frictional heat generated when the flakes of the wallpaper are finely pulverized by the second pulverizer, so that the flakes and the iron pieces are separated. It becomes easy. Thereby, even when a large amount of iron pieces is mixed in the wallpaper, most of the mixed iron pieces can be removed by the two-stage magnetic separator. Accordingly, it is possible to obtain fine flakes suitable for recycling that are not mixed with foreign matters.

  In addition, according to another feature of the present invention, a magnet can always be present on the flake path in the magnetic separator, so that the mixed iron pieces can be adsorbed efficiently. Further, since the iron piece is not directly attracted to the magnet but is attracted to the non-magnetic cylinder, it is easy to remove the attracted iron piece. Therefore, the magnetic separator can be easily maintained.

  In addition, according to another feature of the present invention, flakes can be further easily dried by the wind power of the suction machine, so that the flakes and the iron pieces are easily separated. Therefore, the mixed iron pieces can be efficiently adsorbed by the magnetic separator.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram illustrating a configuration example of a wallpaper crushing system according to the present embodiment. In FIG. 1, reference numeral 1 denotes a first pulverizer, which roughly pulverizes the input wallpaper by a shearing action of a fixed blade and a rotary blade and discharges flakes. Reference numeral 2 denotes a blower that conveys the flakes to the subsequent stage by adding wind power to the coarsely pulverized wallpaper flakes. Reference numeral 3 denotes a magnetic separator, which removes the iron pieces mixed in the flakes by attracting them with a magnetic force. Reference numeral 4 denotes a second pulverizer, which finely pulverizes the coarsely pulverized wallpaper flakes by the shearing action of the fixed blade and the rotary blade, and discharges the flakes.

  Reference numeral 5 denotes a cyclone, which generates an air flow inside and causes the flakes of the wallpaper finely pulverized by the second pulverizer 4 to be pressed along the wall surface by gravity while being pressed against the inner wall surface by centrifugal force. 5A is a rotary valve provided below the cyclone 5, and discharges flakes accumulated below the cyclone 5 (above the rotary valve 5A) by rotating like a water wheel.

  A suction machine 6 applies wind force to the flakes of the wallpaper finely pulverized by the second pulverizer 4, thereby conveying the flakes to the cyclone 5 and generating an air flow in the cyclone 5 by sucking air. Reference numeral 7 denotes a dust collecting unit that collects flakes discharged by the rotary valve 5A. Reference numeral 8 denotes a filter, which is provided at the suction port of the suction machine 6 and has a mesh for preventing the passage of flakes. Thereby, the flakes sucked by the suction device 6 are collected without falling along the inner wall surface of the cyclone 5. Reference numeral 9 denotes a cylindrical connecting portion for connecting the above-described components, and a spiral duct or an abrasion resistant hose is used. In addition, the connection part 9 which connects the 2nd grinder 4 and the cyclone 5 corresponds to the 2nd connection part of a claim.

  FIG. 2 is a cross-sectional view illustrating a schematic configuration example of the first crusher 1 applied to the wallpaper crushing system according to the present embodiment. In FIG. 2, reference numeral 11 denotes an input port for inputting the collected wallpaper. An opening is formed at the top of the slot 11 to facilitate the loading of wallpaper. Reference numeral 12 denotes a rotary drum, to which a rotary blade 12a having three blades provided on the outer peripheral surface is integrally attached. The rotary blade 12a is also rotated by the rotation of the rotary drum 12. Here, the rotation locus of the rotary blade 12a is cylindrical. Reference numeral 13 denotes a fixed blade, which is disposed so as to mesh with the rotation of the rotary blade 12a. Then, pulverization is performed between the rotary blade 12a and the two fixed blades 13 by a shearing action. Reference numeral 14 denotes a motor that rotates the rotating drum 12 by power transmission means such as a belt 15 connected to the rotating drum 12.

  Reference numeral 16 denotes a screen provided with a plurality of through-holes of a predetermined size, which is formed so that the tip of the rotary blade 12a comes into contact with a part of the rotation trajectory when the rotary blade 12a rotates. The screen 16 is formed with a plurality of through holes having the same diameter, and allows only flakes of a size that can pass through the through holes from the flakes crushed by the rotary blade 12a and the fixed blade 13. And drop it down. Here, in the first pulverizer 1, since the size of the flakes of the wallpaper to be roughly pulverized is about 3 cm, the through-hole formed in the screen 16 has a diameter of about 3 cm. Reference numeral 17 denotes a discharge port for discharging the flakes that have passed through the screen 16.

  Next, the operation of the first pulverizer 1 will be described. The wallpaper made of PVC paper peeled off from the wall surface is fed into the slot 11 without removing the backing paper. The input wallpaper is crushed by the shearing action of the rotary blade 12 a and the fixed blade 13. At this time, the screen 16 provided so as to be in contact with the rotary blade 12a in a part of the rotation locus of the rotary blade 12a sifts the flakes of the wallpaper coarsely pulverized by the rotary blade 12a and the fixed blade 13.

  The flakes that have passed through the screen 16 fall by gravity to a discharge port 17 provided further downward in the main body. And the connection part 9 is attached to the discharge port 17, and flakes are sent to a back | latter stage through the connection part 9. FIG. Here, when the wallpaper is roughly pulverized by the first pulverizer 1, frictional heat is generated between the rotary blade 12a, the fixed blade 13, and the flakes.

  FIG. 3 is a cross-sectional view illustrating a schematic configuration example of the second pulverizer 4 applied to the wallpaper pulverizing system according to the present embodiment. In FIG. 3, reference numeral 42 denotes a rotary drum, which is integrally attached with a rotary blade 42a provided with three blades on the outer peripheral surface. The rotary blade 12a is also rotated by the rotation of the rotary drum 12. Here, the rotation locus of the rotary blade 42a is cylindrical. Reference numeral 43 denotes a fixed blade, which is disposed so as to mesh with the rotation of the rotary blade 42a. Then, pulverization is performed between the rotary blade 42a and the two fixed blades 43 by a shearing action. Reference numeral 44 denotes a motor that rotates the rotating drum 42 by power transmission means such as a belt 15 connected to the rotating drum 42.

  Reference numeral 45 denotes a screen provided with a plurality of through holes of a predetermined size, and is formed such that when the rotary blade 42a rotates, the tip of the rotary blade 42a is in contact with a part of the rotation trajectory. A plurality of through holes having the same diameter are formed in the screen 46, and only flakes of a size that can pass through the through holes are passed through the flakes crushed by the rotary blade 42a and the fixed blade 43. And drop it down. Here, in the second pulverizer 4, since the size of the flakes to be finely pulverized is about 0.1 to 0.5 mm, the through-hole formed in the screen 45 has a diameter of about 0.5 mm. ing. Reference numeral 17 denotes a discharge port for discharging the flakes that have passed through the screen 16.

  Next, the operation of the second pulverizer 4 will be described. The wallpaper flakes coarsely pulverized by the first pulverizer 1 are put into the second pulverizer 4 via the connecting portion 9. The input wallpaper is crushed by the shearing action of the rotary blade 42 a and the fixed blade 43. At this time, the screen 45 provided so as to be in contact with the rotary blade 42a in a part of the rotation locus of the rotary blade 42a sifts the flakes of wallpaper finely pulverized by the rotary blade 42a and the fixed blade 43.

  The flakes that have passed through the screen 45 fall by gravity to a discharge port 17 that is further provided inside the main body. And the connection part 9 is attached to the discharge port 17, and flakes are sent to a back | latter stage through the connection part 9. FIG. Here, when the flakes are finely pulverized by the second pulverizer 4, frictional heat is generated among the rotary blade 42a, the fixed blade 43, and the flakes.

  In the second pulverizer 4, the flakes are finely pulverized, so that a stronger pulverization force and a faster pulverization speed are required than in the first pulverizer 1 that coarsely pulverizes the wallpaper. Therefore, the 1st crusher 1 and the 2nd crusher 4 use the rotary blade suitable for each, a fixed blade, and a motor.

  FIG. 4 is a diagram illustrating a configuration example of the magnetic separator 3 applied to the wallpaper crushing system according to the present embodiment. Fig.4 (a) is a top view of the magnetic separator 3, and FIG.4 (b) is the sectional view on the AA 'line of Fig.4 (a). In FIG. 4, 20 is a housing | casing, The flakes of the wallpaper crushed by the 1st grinder 1 or the 2nd grinder 4 can pass the inside in the left-right direction in the figure.

  Reference numeral 21 denotes a bar-shaped magnet, and a plurality of magnets are provided in the housing 20. The plurality of bar-shaped magnets 21 are arranged in a plurality of rows on a plane perpendicular to the direction in which the flakes travel. The plurality of rod-shaped magnets 21b arranged in the n-th row (n is an integer of 2 or more) is a gap between the plurality of rod-shaped magnets 21a arranged in the (n-1) -th row as viewed from the direction in which the flakes travel. Placed in. Thereby, the iron piece contained in flakes can be adsorbed with high probability. Reference numeral 22 denotes a non-magnetic cylindrical body into which the rod-shaped magnet 21 can be inserted. Here, the magnetic force of the rod-shaped magnet 21 is large enough to attract an iron piece through the cylindrical body 22, and the diameter of the cylindrical body 22 is large enough to make the magnetic force effective against the outer periphery of the cylindrical body 22. It is.

  Reference numeral 23 denotes a first lid, which has a rod-shaped magnet 21 attached to the surface on the housing 20 side, and a gripping body 23a attached to the other surface. Reference numeral 24 denotes a second lid, which is provided between the housing 20 and the first lid 23, and a cylindrical body 22 is formed on the surface on the housing 20 side. A through hole is provided in the portion of the second lid 24 where the cylindrical body 22 is formed so that the rod-shaped magnet 21 can be inserted.

  With such a configuration, as shown in FIG. 5, the rod-shaped magnet 21 can be pulled out from the housing 20 and the cylindrical body 22 by pulling the gripping body 23 a upward and lifting the first lid 23. Further, the cylindrical body 22 can be pulled out from the housing 20 by lifting the second lid 24 directly. When the cylindrical body 22 is inserted into the casing 20 and the rod-shaped magnet 21 is inserted into the cylindrical body 22, the iron piece 25 mixed in the flakes moving in the casing 20 is The rod-like magnet 21 is attached to the cylinder 22 by the magnetic force.

  In such a magnetic separator 3, if the iron piece 25 attached to the cylindrical body 22 is left as it is, the iron piece 25 becomes difficult to adhere to the surface of the cylindrical body 22, so the iron piece 25 needs to be collected periodically. In that case, first, the second lid body 24 is taken out from the housing 20. In this state, when the first lid body 23 is pulled away from the second lid body 24 by the gripping body 23 a, the rod-shaped magnet 21 is pulled out from the cylindrical body 22. Then, since the magnetic force is lost in the cylinder 22, the iron piece 25 is easily separated from the cylinder 22 and can be easily collected.

  Next, the operation of the wallpaper crushing system according to the present embodiment will be described. First, a wallpaper made of PVC paper is introduced into the inlet 11 of the first crusher 1. The input wallpaper is roughly pulverized by the shearing action of the rotary blade 12 a and the fixed blade 13. The coarsely pulverized wallpaper flakes pass through the screen 16 and fall to the discharge port 17.

  The flakes discharged from the discharge port 16 of the first pulverizer 1 are sent toward the rear stage in the connecting portion 9 by the wind force of the blower 2. Two magnetic separators 3 are provided between the first pulverizer 1 and the second pulverizer 4, thereby removing a part (mainly coarse) of the iron pieces 25 mixed in the flakes. It is.

  The flakes from which a part of the iron piece 25 has been removed by the magnetic separator 3 are automatically thrown into the second crusher 4 by the wind force of the blower 2. The introduced flakes are further finely pulverized by the shearing action of the rotary blade 42 a and the fixed blade 43. Here, the second pulverizer 4 has a stronger pulverization force and pulverization speed than the first pulverizer 1.

  The finely pulverized flakes pass through the screen 45 of the second pulverizer 4 and fall to the discharge port 17. The flakes discharged from the discharge port 17 of the second crusher 4 are sent toward the rear stage in the connecting portion 9 by the wind force of the blower 2 and the suction force of the suction device 6. Three magnetic separators 3 for removing iron pieces from the flakes are provided at the subsequent stage of the second pulverizer 4, thereby removing fine iron pieces 25 that could not be removed in step S 3.

  The flakes from which the fine iron pieces 25 have been removed are sent to the cyclone 5. Inside the cyclone 5, an air flow is generated by the suction machine 6. Due to this airflow, the flakes are pressed against the inner wall surface by centrifugal force. And the flake pressed against the inner wall surface of the cyclone 5 falls down along the wall surface. A rotary valve 5 </ b> A is provided below the cyclone 5, whereby flakes accumulated below the cyclone 5 are discharged to the dust collecting unit 7.

  On the other hand, the filter 8 provided at the suction port of the suction device 6 has a mesh for preventing the passage of flakes, and collects the flakes sucked by the suction device 6 without falling along the wall surface of the cyclone 5.

  As described above in detail, in the wallpaper crushing system of the present embodiment, the first crusher 1 for roughly crushing the wallpaper and the second crusher 4 for finely crushing are separately provided. In the magnetic separator 3 provided between the second crusher 4 and the iron pieces are first adsorbed to the flakes of the coarsely pulverized wallpaper, the iron pieces are coarsely pulverized and become too small at this stage. Nothing will happen. In addition, in the present embodiment, flakes are transported from the first pulverizer 1 to the second pulverizer 4 via the magnetic separator 3 by the wind force of the blower 2, so that the wallpaper is moistened by moisture such as glue. The flakes are dried by the frictional heat generated when the wallpaper is roughly pulverized by the first pulverizer 1 and the wind force for conveying the flakes, so that the flakes and the iron pieces are easily separated. can do. Thereby, the comparatively big iron piece isolate | separated from flakes can be removed efficiently.

  In the present embodiment, the magnetic separator 3 is also provided at the subsequent stage of the second pulverizer 4, and the flakes of the wallpaper finely pulverized by the second pulverizer 4 are separated by the wind power of the blower 2 and the suction device 6. 3 is allowed to pass through. Thereby, the flakes are dried by the frictional heat generated when the flakes are finely pulverized by the second pulverizer 4 and the wind force for conveying the flakes, so that the iron pieces can be easily separated from the flakes. it can. At this stage, only iron pieces that cannot be completely removed between the first pulverizer 1 and the second pulverizer 4 are to be removed, so that most of them can be removed. Therefore, it is possible to finally obtain fine flakes suitable for recycling in which no foreign matter is mixed.

  In the present embodiment, one blower 2 is provided between the first pulverizer 1 and the magnetic separator 3, but the present invention is not limited to this. For example, the blower 2 may be provided between the magnetic separator 3 and the magnetic separator 3, or may be provided after the second pulverizer 4.

  In this embodiment, two magnetic separators 3 are provided between the first pulverizer 1 and the second pulverizer 4, and three magnetic separators 3 are provided between the second pulverizer 4 and the cyclone 5. However, the present invention is not limited to this.

  In the present embodiment, wallpaper made of PVC paper is used, but the present invention is not limited to this.

  In addition, the said embodiment is only what showed the example in implementation in implementing this invention, and, as a result, the technical scope of this invention should not be interpreted limitedly. In other words, the present invention can be implemented in various forms without departing from the spirit or main features thereof.

  The present invention is useful for a pulverization system for pulverizing wallpaper for recycling to obtain flakes.

It is a block diagram which shows the structural example of the grinding | pulverization system for wallpaper by this embodiment. It is sectional drawing which shows the schematic structural example of the 1st grinder applied to the grinding | pulverization system for wallpaper by this embodiment. It is sectional drawing which shows the schematic structural example of the 2nd grinder applied to the grinding | pulverization system for wallpaper by this embodiment. It is a figure which shows the schematic structural example of the magnetic separator applied to the grinding | pulverization system for wallpaper by this embodiment. It is a figure which shows the state which pulled out the magnet and cylinder of the magnetic separator applied to the grinding | pulverization system for wallpaper by this embodiment. It is sectional drawing which shows the wallpaper made from common vinyl chloride. It is sectional drawing which shows the wallpaper made from a PVC paper grind | pulverized with the grind | pulverizing system for wallpaper by this embodiment. It is a figure explaining the pasting method of a wallpaper.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st grinder 2 Blower 3 Magnetic separator 4 2nd grinder 5 Cyclone 6 Suction machine 7 Dust collector 8 Filter 9 Connection part

Claims (4)

A first crusher for coarsely crushing the wallpaper;
A magnetic separator that removes the iron pieces mixed in the flakes of the wallpaper roughly pulverized by the first pulverizer by magnetic force;
A second pulverizer for finely pulverizing wallpaper flakes from which iron pieces have been removed by the magnetic separator;
A cylindrical connecting part for connecting the first pulverizer and the second pulverizer via the magnetic separator;
A blower that generates wind power to send wallpaper flakes coarsely pulverized by the first pulverizer to the second pulverizer through the connecting portion;
A crushing system for wallpaper.   The pulverizing system for wallpaper according to claim 1, further comprising a magnetic separator that adsorbs and removes iron pieces mixed in the flakes of the wallpaper finely pulverized by the second pulverizer by a magnetic force. The magnetic separator includes a casing through which crushed wallpaper flakes pass, a plurality of bar-shaped magnets arranged in a plurality of rows in the casing on a plane perpendicular to the direction in which the flakes travel, and the bar-shaped A non-magnetic cylinder covering the outer periphery of the magnet,
The plurality of rod-shaped magnets arranged in the nth row (n is an integer of 2 or more) are arranged in the gaps between the plurality of rod-shaped magnets arranged in the (n-1) th row as viewed from the direction in which the flakes travel. The wallpaper crushing system according to claim 1 or 2, characterized in that A cyclone having an inner wall surface against which the flakes of the wallpaper finely pulverized by the second pulverizer are pressed by a centrifugal force generated by an air current, and dropping the flakes along the inner wall surface by gravity;
A cylindrical second connecting part for connecting the second pulverizer and the cyclone;
A suction machine for generating wind currents for sending the flakes to the cyclone via the second connecting portion, and for generating the airflow;
The wallpaper crushing system according to claim 1, further comprising:

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