JP2020002501A - Method of used paper pulp production from used paper packages and manufacturing apparatus thereof - Google Patents

Abstract

To provide a method and an apparatus for disintegration of used paper packages without depending on manpower and by using a disintegration device and for effective utilization of resources by recovery of used raw papers from shredded products.SOLUTION: A used paper package is disintegrated by using a disintegration device 10 to obtain a disintegrated product, the disintegrated product having been disintegrated is subjected to discrimination treatment, a used raw paper having been subjected to the discrimination treatment is supplied to a used paper pulp production process to produce a used paper pulp. The disintegrated product is subjected to color measuring by using a color measuring camera to determine whether a whiteness of a colorimetry value having been through the color measuring is high or low, matters having the whiteness being low are discriminated for acquisition, this acquisition raw material is supplied to a used paper pulp production process to produce a used paper pulp.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a manufacturing method and a manufacturing apparatus for manufacturing waste paper pulp raw material from waste paper packaged goods.

  In a paper mill, waste paper collected from the city is recycled into pulp by a recycling facility, and then made again to be used as recycled paper typified by newsprint.

  In recent years, with the diversification of life, there is an increasing tendency for contraindicated products such as laminated paper to coexist.

Therefore, the so-called difficult-to-process waste paper that is evaluated as a contraindicated product is mixed in the waste paper collected in the market.
In paper mills, difficult-to-process waste paper cannot be accepted because it causes various quality deteriorations in the papermaking process.

For this reason, a waste paper collection company mainly separates difficult-to-process waste paper containing contraindicated items from waste paper mainly by hand and, for example, a first waste paper that can be recycled into newsprint paper and a second waste paper that can be recycled into cardboard base paper, for example. The paper is separated from used paper, packed (compressed) for each type of used paper, and delivered to a paper mill in the state of used paper veil.
In a paper mill, a used paper bale is directly or unpacked (cutting a bundling wire) and put into a pulper in a newsprint factory or a corrugated paper factory to produce used newspaper pulp or corrugated paper pulp.

  However, the time required to sort and remove contraindicated items at the recovery stage of waste paper, the time required to separate the first waste paper and the second waste paper described above is large, and the part relying on human labor is large, and the cost of receiving waste paper is rising. linked. In addition, there is a high need to review from the working environment.

On the other hand, it is desirable for waste paper recovery companies to be able to sell waste paper to paper mills in a mixed state without sorting waste paper after it is collected. Mixed quality paper cannot be accepted because it causes various quality deterioration.
Of course, a method of receiving mixed waste paper and incinerating it is also conceivable, but the amount of energy recovered by incineration is not high. When considering waste paper as a useful resource, incineration should be avoided.

  Many technical challenges remained in the selection and contraindication of contraindicated items, and ultimately resorted to human naval tactics.

As a means for sorting used paper, it is known that wind power, specific gravity, magnetic force, the size of an object, and the like are used as sorting criteria.
However, this type of sorting is effective for removing foreign substances, but is not effective for separating and removing difficult-to-treat waste paper in which contraindicated substances of contraindicated products are integrated with paper.

Prior arts include the following prior arts.
Patent Document 1 recovers waste paper pulp from waste paper raw materials including waste magazine paper.
The present invention is directed to recovering waste paper pulp from waste magazine paper that is difficult to turn into waste paper pulping, and relates to a technique for removing adhesive foreign matter from used magazine paper. The method uses a medium-concentration pulper at an appropriate disaggregation temperature, classifies fibers using a fractionator, removes foreign substances using a cleaner, and separates foreign substances using a rough-selection screen and a fine-selection screen to recover waste paper pulp. However, this technique has no idea of recovering waste paper pulp from contraindicated products, for example, difficult-to-treat waste paper including gold-silver laminate, gypsum board, release paper and the like.

JP 2018-9263 A

  The main problem to be solved by the present invention is to disassemble a waste paper package containing contraindicated products (for example, a so-called waste paper bale compressed and packed) by a crushing device without relying on humans, and recover waste paper from the crushed material. The purpose is to make effective use of resources.

The present invention which has solved the above-mentioned problems,
The packaged waste paper is crushed by a crusher to obtain a crushed material, and the crushed crushed material is discriminated, and the discarded waste paper material is supplied to a used paper pulp manufacturing process to produce used paper pulp. The method,
The color of the crushed material is measured using a colorimetric camera, the whiteness of the measured colorimetric value is determined to be high or low, and the low whiteness is obtained by discriminating,
The obtained raw material is supplied to the waste paper pulp manufacturing process to produce waste paper pulp.
A method for producing waste paper pulp from waste paper packaged goods.

  The waste paper package is crushed by a crusher to obtain a crushed material and directly discriminate against the crushed crushed material, or the crushed crushed material is separated on a size basis and separated. A large crushed material can be discriminated.

In a corrugated cardboard mill, conventionally, a recovered paper collecting company has used human resources to separate used paper as raw material for manufacturing corrugated cardboard after collecting the used paper. Therefore, in the cardboard base paper mill, the waste paper pulp has been manufactured by unsorting or unpacking the waste paper package after sorting. That is, as far as the inventor knows, discrimination has not been performed in a cardboard base paper mill.
However, in the present invention, the color of the crushed material is measured using a colorimetric camera, and it is determined whether the colorimetric value of the colorimetric value is high or low, and the whiteness is discriminated. The obtained raw material is supplied to the used paper pulp manufacturing process of a cardboard base paper mill to manufacture used paper pulp.
Therefore, the colored waste paper raw material can be obtained and used for the production of the cardboard base paper without relying on human power.

In the waste paper pulp manufacturing process,
A dry crushing process for dry crushing waste paper raw materials,
Disintegration step of disintegrating by high-concentration pulper after the dry disintegration step,
A separation step of separating heavy foreign matter after the disaggregation step,
After the separation step, a pre-cleaner, a hole screen, a slit screen, and a post-selection step of carefully selecting the post-stage cleaner,
Having a dehydration step of dehydrating after the selective step,
The first foreign matter removed by the hole screen and the second foreign matter removed by the slit screen may be introduced into the former-stage cleaner.

If the waste paper package contains contraindicated products, the contraindicated factors are grasped, and a material having a large contraindicated factor is not appropriate as a raw material for waste paper, and when a cellulose component is dominant, it can be used as a raw material for waste paper.
As a technique for this, for the crushed product, it is determined whether or not the cellulose component is dominant based on the absorbance spectrum measured by a hyperspectral camera, and the whiteness is low, and the cellulose component is dominant. In this case, it can be used as the raw material to be supplied to the waste paper pulp manufacturing process.
As described later, it can be determined whether or not the cellulose component is dominant based on the absorbance spectrum measured by the hyperspectral camera.

As an equipment for manufacturing waste paper pulp from waste paper packaging,
A crusher for crushing waste paper packaging,
The color of the crushed material crushed by the crushing device is measured using a colorimetric camera, and it is determined whether the whiteness of the measured colorimetric value is high or low. Discriminating means for discriminating as a raw material,
Means for supplying the waste paper raw material after the discrimination process to the waste paper pulp manufacturing process;
Used paper pulp manufacturing equipment for manufacturing used paper pulp.

  ADVANTAGE OF THE INVENTION According to this invention, it shreds from a waste paper packaged product containing a contraindicated product or a contaminated product (for example, a so-called compressed paper bale compressed and packed) with a crushing device without relying on humans, and recovers used paper material from the crushed material. Resources can be used effectively.

It is an outline flow figure of processing of used paper packing goods. It is a front view of a crushing apparatus. It is a top view of a crushing apparatus. It is a perspective view of the crushing blade of a crushing apparatus. It is a top view of a separation device. It is a principal part perspective view of a separation device. It is a principal part top view of a separation apparatus. It is a front view which shows the whole from a separation apparatus to a sorting apparatus. It is an outline perspective view of an example of a discrimination device. It is an outline explanatory view of an example of a discrimination device. It is an outline flow figure of an example of used paper pulp manufacturing equipment. It is an outline flow figure of other used paper pulp manufacturing equipment examples. It is AA sectional drawing of a crushing apparatus. (A) (b) It is a side view of another embodiment of a crushing blade. It is an explanatory view of a crushing process of a compressed packing article as it is. FIG. 11 is a diagram showing another embodiment of the transport disk. FIG. 11 is a diagram showing another embodiment of the transport disk. (A), (b) is an explanatory view of a phase shift of a conveyance disk. FIG. 3 is a wavelength intensity distribution diagram of a near-infrared reflected wave of paper. It is a wavelength intensity distribution figure of the near-infrared reflected wave of PE. It is a wavelength intensity distribution figure of the near-infrared reflected wave of PP. It is a wavelength intensity distribution figure of the near-infrared reflected wave of PS. FIG. 4 is a wavelength intensity distribution diagram of a near-infrared reflected wave of PET. It is a wavelength intensity distribution figure of a near-infrared reflected wave of PVC.

  Next, an embodiment for carrying out the present invention will be described. Note that this embodiment is merely an example of the present invention.

FIG. 1 shows an example of the processing of a waste paper package containing or not containing contraindicated products of the present invention. The outline of the processing will be described in advance with reference to FIG.
In this example, a waste paper package made of a mixture of contraindicated products will be described. In general, a compressed and compressed package 1, which is generally called a waste paper veil, is conveyed to a loading conveyor 3 by, for example, a fork list 2, It is thrown into the crusher 10 from the feeding conveyor 3 via the hopper 4 by the conveyor 5.
Since the compressed packaged product 1 is bound by, for example, a wire, the binding device such as the wire 6 can be removed at an appropriate time before reaching the crushing device 10 or within the crushing device 10. In the crusher 10 according to the embodiment described later, crushing can be performed while breaking the line 6.

(Compressed packaging)
The compressed packaged product 1 is formed by pressing and solidifying a predetermined amount of used paper including contraindicated products with a baler (compression packing machine) at a pressure of about 120 to 150 kg / cm ³ , and packing it with a number line 6 or the like. The weight is about 1000-1500 Kg, and the volume is about 1-2 m in height × 1-2 m in width × 1-2 m in length.

(Crusher)
FIGS. 2 to 4 show ten examples of the crusher according to the present embodiment. The crusher 10 crushes (crushes) the compressed packaged product 1, separates and breaks the paper bundle. The inside of the casing main body 101 of the crushing device 10 is a crushing section 103, and a hopper 102 is provided at an upper portion of the casing main body 101. The lower portion of the casing body 101 is open.

In the crushing unit 103, support shafts 10A and 10A having a plurality of crushing blades 10B are arranged from one inner wall of the crushing unit 103 (the inner wall of the casing body 101) to the other opposing inner wall. The direction of the support shaft 10A may be the transport direction of the transport conveyor 11 provided in a later step, or may be the width direction.
In the embodiment, two support shafts are provided, and the first support shaft 10A and the second support shaft 10A are separated from each other in the horizontal direction, for example. However, the number of support shafts may be three or more.

Each of the first support shaft 10A and the second support shaft 10A is independently rotatable about the axis of the support shaft. The rotation speed of the support shaft 10A can be appropriately adjusted. Therefore, the rotation speed of the support shaft 10A is adjusted in accordance with the amount of waste paper pulp to be finally manufactured per unit time, and the amount of the compressed packaged product 1 input to the crushing device 10 per hour is adjusted. Can be.
If the number of support shafts is two, the crushing device does not become unnecessarily large and does not take up space for installation. In addition, the size of the crusher becomes compact.
The rotation direction of each support shaft 10A can be independently selected. A plurality of support members 104 are arranged below the support shaft 10A in a direction perpendicular to the support shaft 10A and in a horizontal direction, separated from the support shaft 10A.
If the rotation direction of the support shaft 10A can be selected independently, that is, by adding an operation of rotating the first support shaft 10A and the second support shaft 10A in the same direction and rotating in the opposite direction, the compressed packaged product 1 Alternatively, it is possible to prevent clogging of the crushed material. Further, since the support member 104 is provided, the papers in the middle of being crushed tend to stay on the support member 104 until the paper is crushed to an appropriate size. Therefore, it is possible to prevent papers that are not crushed into an appropriate size from dropping onto the conveyor 11 as a lump.

  The support member 104 may be provided in the middle of the crushing blades 10B, 10B separated in the longitudinal direction of the support shaft 10A, but as shown in the figure, when the crushing blade 10B is brought closer to one of the crushing blades 10B, Although the distance between the support member 10B and the support member is short and long, the distance appears alternately in the longitudinal direction of the support shaft 10A.

(Crushing blade)
As shown in FIG. 4, a plurality of crushing blades 10B are provided at right angles to the support shaft 10A, and the crushing blades 10B are disposed apart from each other in the direction of the support shaft 10A. A hook-shaped portion (hook portion) 10C is formed on the crushing blade 10B so as to protrude outward from the crushing blade 10B.
The number of hook-shaped portions (hook portions) 10C of the crushing blade 10B may be arbitrary, and is six in the example of FIG. 13 and two in the example of FIG. As shown in the example of FIG. 14, a total of two hook-shaped portions (hook portions) 10C may be provided at distant positions on the circumference of the crushing blade 10B (FIG. 14 (a)). In other words, two hook-like portions (hook portions) 10C may be provided so as to face outward, as in a so-called anchor type (FIG. 14B). Further, all the directions of the hook-shaped portions (hooks) 10C of the crushing blade 10B are the same, and as shown in a modified example in FIG. 13, the hook-shaped portions (hooks) 10C face each other. You may have.

  The protruding length h along the radial direction from the center 10Q in the hook-shaped portion (hook portion) 10C of the crushing blade 10B can be appropriately selected in relation to the crushing characteristics. Is preferably 15 cm to 80 cm, particularly preferably 25 cm to 60 cm.

In addition, the direction of the hook-shaped portion (hook portion) 10C (the inner side surface (inner line) that is depressed with respect to the line connecting the tip of the hook-shaped portion (hook portion) 10C and the axis of the support shaft 10A is rotated with rotation. The moving direction may be the FR direction or the BA direction shown in FIG.
In the illustrated example, the crushing blades (10B1, 10B2, 10B3, 10B4) are in the FR direction, and the crushing blades (10B5, 10B6, 10B7) are in the BA direction. The crushing blades (10B2 ', 10B3', 10B4 ') are in the BA direction, and the crushing blades (10B5', 10B6 ') are in the FR direction. With such an arrangement, the hook-shaped portion 10C comes into contact with the compressed packaged article 1 regardless of which side the support shaft 10A is rotated, so that crushing is performed smoothly. Here, the FR direction is a clockwise direction when the support shaft 10A is viewed from the left side to the right side in the same figure, and the BA direction is a counterclockwise direction.

  The positions of the hooks 10C of the crushing blades 10B, 10B,... Along the axis are different in the direction around the axis. In other words, when the support shaft 10A is rotated, the adjacent crushing blades 10B, 10B... Are arranged so that their phases are different. Specifically, as viewed in the direction of the axis of the support shaft 10A (viewed along the arrow AA in FIG. 4), as shown in FIG. 13, in the relationship between the adjacent crushing blades 10B1 and 10B2, The angle formed by the crushing blade 10B1, the center 10Q, and the crushing blade 10B2 can be formed to be a predetermined angle α. The angle α is not particularly limited, but can be appropriately selected, for example, within a range of 10 degrees to 80 degrees.

  As another embodiment, three or more support shafts 10A can be arranged in parallel. Even in such a case, when the crushing blades 10B of the adjacent support shafts 10A are made closest to each other, the adjacent support shafts 10A are arranged in parallel so that the closest crushing blades 10B are separated from each other. I do.

  The compressed packaged product 1 is transported by the transport conveyor 5 and put into the crusher 10. The compressed packaged product 1 guided to the crushing unit 103 receives force due to the rotation of the crushing blades 10B having different phases, and is gradually crushed while rolling in the x direction and the y direction (see FIG. 3). Then, the sheet bundle is separated, crushed, and broken.

The size of the paper after crushing is not uniform, and large and small papers are mixed. Specifically, for example, it is desirable that at least 50% or more of the crushed material is crushed to a maximum width of 500 mm and a maximum area of about 25 to 10000 cm ² . If the size of the paper after the crushing is too small, the strength of the waste paper pulp finally produced becomes small, which causes deterioration in quality.
The paper crushed to an appropriate size falls onto the conveyor 11 from the open lower part of the crusher 10.

In the above crushing device, the crushing blade is also rotated by the rotation of the support shaft. Since the crushing blade has a hook-like portion at least on the outer peripheral portion, the hook-like portion is caught on the crushed material remaining between the other support shaft and the crushing blade, and the subsequent rotation causes A shearing force acts between the crushing blade and the adjacent crushing blade of the support shaft facing the crushing blade, and the rupture is performed mainly on papers. As a result of such rupture or tearing or repetition, fragmentation occurs.
On the other hand, if the material to be crushed stays for a long time between the supports or between the crushing blades, the point of crushing efficiency should be avoided. However, in the embodiment of the present invention, the position of the hook-shaped portion of the crushing blade group along the axial direction is different in the direction around the axis, so that the crushing portion accompanying the rotation of the support shaft is in the axial direction. Since it is different (changes) with time, the rupture or tear of the material to be crushed is different (changes) with time in the axial direction, and stagnation of the material to be crushed is eliminated.
On the other hand, the support shaft having the crushing blade is arranged in the casing, so that the crushed material and the crushed material are prevented from scattering.
It has been found that the crushing apparatus having the above-mentioned mechanism of action is most suitable for crushing waste paper packaged goods.
If the crushing is qualified, the crushed material is selected as it is or the crushed material is selected by a sorting means, and the selected material is supplied to a waste paper pulp manufacturing process, for example, supplied to a white waste paper pulp manufacturing process to produce newsprint. It can be supplied to a process or a colored waste paper pulp manufacturing process and supplied to a corrugated paperboard manufacturing process to produce newsprint or corrugated paper.

(Separation device)
The papers (crushed material) crushed and fragmented by the crushing device 10 are not directly supplied to the discriminating means or supplied to the waste paper pulp manufacturing process by the transport conveyor 11, but the crushed material is preferably supplied. Separation is performed on the basis of the size, a separated product is obtained, and the separated product is supplied to a discriminating means or supplied to a waste paper pulp manufacturing process.

As this separation device,
A plurality of transport shafts, each having a plurality of transport disks 20B provided on the rotation shaft 20A along the longitudinal direction thereof, are provided in parallel in the transport direction at a distance,
The transfer disk 20B has an outer peripheral surface in which the distance between each point of the locus formed by the outer peripheral surface and the axis of the rotation 20A gradually changes from large to small, and then changes from small to large. Is a preferred form.

Specifically, the transport disk may have a form in which the entire outer peripheral surface has a triangular to hexagonal square shape.
Taking the substantially triangular form having the bulge of FIGS. 5 and 6 as an example, in one of the outer peripheral surfaces, the distance between each point of the locus formed by the outer peripheral surface and the axis of the rotation 10A gradually increases. , From large to small from the corner to the center, and then from small to large to the other corner.

  The separation device 20 according to the embodiment separates the papers conveyed by the conveyor 11. The transported paper is separated into a heavy object PW, an undersize PU, and an oversize PO. For example, the heavy object PW includes a piece of metal, plastic, or the like. Undersize PU includes soft paper and shredded paper. The oversize PO includes paper having a relatively large area or hard paper. The separation device 20 is installed as a whole with the downstream side facing upward.

As shown in FIG. 5, the separation device 20 has a large number of rotation shafts 20A in the flow direction (x direction). Each of the plurality of rotation shafts 20A extends while being separated in the orthogonal y direction.
As shown in FIGS. 6 and 7, a large number of transport disks are provided at predetermined intervals on each rotating shaft 20A, and constitute a transport shaft. The transport disk has a protrusion formed from one surface.
In the illustrated embodiment, the projecting portion has a shape in which the small transport disk 20B projects from the surface of the large transport disk 20C, and is in an integrated form (the transport disks (20B, 20C). It is preferable that the small disks 20B have a common axis of the rotation shaft 20A, but the present invention is not limited to this.
For example, the first transport shaft 20A1 and the second transport shaft 20A2 can be arranged in parallel in the x direction. The transport disks (20B, 20C) provided on the first rotating shaft 20A are formed such that the small transport disk 20B faces the left and the large transport disk 20C faces the right, whereas the next second rotating shaft 20A The transport disks (20B, 20C) provided on the right side are formed such that the transport small disk 20B is directed to the right and the transport large disk 20C is directed to the left, and as shown in FIG. The small disk 20B and the large transport disk 20C are arranged to face each other.
In this embodiment, a region sandwiched between the first rotating shaft 20A, the second rotating shaft 20A, and the four transport disks (20B, 20C) that are close to each other becomes an opening 20D (see FIG. 7). .

  As shown in FIGS. 17 and 18, examples of the small transport disk 20B and the large transport disk 20C can be substantially polygonal in outer shape. For example, polygons such as a triangle, a quadrangle, and a pentagon can be used, and it is more preferable that each side of the polygon has a bulge. When the swelling is provided, excessively rapid movement can be prevented when the adjacent rotating shafts are rotated.

  Each of the large transport disk 20C and the small transport disk 20B may be a triangular shape having a bulge. Alternatively, the large transport disk 20C may be square and the small transport disk 20B may be triangular. However, it goes without saying that the transport disks (20B, 20C) adjacent to each other in the x direction are separated from each other so as not to contact each other when rotated.

  As another embodiment of the transport disk, all the transport disks may have a polygonal shape that is not convex, for example, a triangle or a square (see FIG. 16).

(Input and sorting)
When the separation device 20 is operated, the large number of rotating shafts 20A continue to rotate in the directions of the curved arrows shown in FIG. The rotation speed can be variably adjusted. When the papers conveyed by the conveyance conveyor 11 are guided to the upstream side of the separation device 20, the papers (conveyance material) jump upward due to the shape and the rotational force of the conveyance disks (20B, 20C) and bounce downstream. Move side by side. That is, for example, in the examples shown in FIGS. 5 to 7, when the substantially triangular transport disk rotates, the separation distance between the outer peripheral surface and the rotation axis changes, so that the paper is flipped to the downstream side of the separation device 20. On the contrary, the conveyor 11 is preferably lifted up to an inclination angle of 10 to 30 degrees or sent in while being made to rise.

(Heavy load PW)
The separation device 20 is installed in an inclined state with the downstream side facing upward. Since the heavy object PW does not jump up or does not easily jump up, it falls down from the upstream of the separation device 20 and is collected from the downstream end thereof. This heavy load PW is discharged to a scrap yard using, for example, a forklift 2.

(Undersized PU)
Of the transport material from which the heavy load PW has been removed, relatively soft paper, shredded paper, etc. (undersize PU) fall from the opening 20D during the transport process. The undersized PUs are collected and used, for example, as fuel.

(Oversize)
Further, the transport material from which the undersize PU has been removed is sequentially moved to the downstream end of the separation device 20. The conveyed material (oversize PO) dropped from the downstream end is mainly composed of paper having a relatively large area or hard paper, and is guided to the subsequent discrimination step.
The fraction of the oversized PO can be appropriately selected, and for example, can be based on a 25 cm ² fraction.

  In the process of manufacturing white waste paper and colored waste paper from waste paper packaged goods, it is necessary to sort raw white paper or colored waste paper and other materials. Even if contraindicated items are removed from the used paper packaging, scrap, soft paper, shredded paper, etc. (for example, used paper that is several centimeters square) that are not worth sorting are still mixed in the crushed paper. I do. These undersize PUs hinder the process of producing excellent white and colored waste paper.

  Conventionally, the undersize PU was manually removed, but this was cost-effective. By using the separation device 20 according to the present embodiment, not only the heavy load PW but also the undersize PU is eliminated. Then, the undersize PU included in the oversize PO can be reduced as much as possible. Therefore, high-quality raw white paper and colored raw paper can be used in the subsequent discrimination step, which leads to an improvement in the quality of manufactured products.

  Further, among the papers that have been crushed to an appropriate size by the crushing apparatus 10, there are cases where some papers remain in a lump state or some papers remain in an integrated state. Even in the papers in such a state, the lump of the paper is released by the jumping or the bouncing by the separation device 20, and the adhered paper is dispersed. Thus, the heavy object PW, the undersize PU, and the oversize PO are separated.

The oversized product PO is loaded into the loading feeder 30 via, for example, the conveyor 12. The input feeder 30 can constitute a dispersing unit or a part of the dispersing unit.
An example of the input feeder 30 is a vibrating feeder whose downstream side is inclined downward. In the input feeder 30, in the process of falling to the downstream side, it is dispersed in the width direction, and at the same time, the overlap of the oversized products PO is released to achieve dispersion (individualization).
In addition, a mode in which the transport conveyor 12 and the input feeder 30 are not provided may be adopted. In this case, the oversized product PO separated by the separation device 20 is directly supplied to the discrimination (separation) device 40.

(Discrimination means)
The oversized product PO dispersed by the input feeder 30 is input to the discrimination (separation) device 40.
It is desirable that the discrimination (separation) device 40 includes, for example, a conveyor 41, a colorimetric unit for performing colorimetry using a colorimetric camera 42, and a material measuring unit for measuring a material with the hyperspectral camera 43.
The first discriminating means 44 for judging whether or not the whiteness of the colorimetric value by the colorimetric means is high for each conveyed article, and the absorbance spectrum measured by the material measuring means for each conveyed article. It is desirable to have a second discriminating means 45 for judging whether or not the cellulose component is dominant.
The colorimetric camera 42 and the hyperspectral camera 43 may be provided in parallel in the width direction of the conveyor 41, or may be provided side by side in the flow direction of the conveyor 41. It is preferable to provide a plurality of transfer conveyors 41 in parallel in the width direction of the transfer conveyor 41 from the viewpoint of improving the cooperation operation accuracy.

  By the discrimination by the first discriminating means 44 and the second discriminating means 45, when the whiteness of the colorimetric value is high and the cellulose component is dominant, the colorimetric value is used white paper. When the whiteness of the value is low and the cellulose component is dominant, the paper can be discriminated as colored waste paper, and sorting can be performed based on the discrimination signal.

In the sorting step, when the cellulose component is not predominant, it can be processed as a product other than a used paper product.
The Japan Consumer Paper Recycling Promotion Center defines "contraindicated products" as "foreign matter that does not become a raw material for papermaking".
Examples of papers include envelopes with adhesives, back carbon paper, carbonless paper (such as courier copy slips), and water-proof paper (paper cups, paper plates, paper cup noodle containers, paper Yogurt containers, oiled paper, wax paper, etc.), pressure-bonded postcards (confidential postcards), thermal papers (fax papers, receipts, etc.), photographic paper photographs, inkjet photo print papers, photosensitive papers (blue baked copy papers), plastic films and aluminum Paper of composite material with foils and the like, paper with gold and silver etc. foil pressed, paper with smell (soap wrapping paper, paper detergent container, paper box of incense stick, etc.), printing paper ( There are sublimation transfer paper, paper mainly used for printing a pattern or the like on a fabric by heating, and heat-sensitive foamed paper (paper mainly used in relation to Braille, where the heated area rises when heated).
Examples of "other than paper" include adhesive tapes, patches, file hardware, metal clips, films, cellophane, and styrofoam.
As shown in the example of the contraindicated product, the item “other than paper” is a contraindicated product and cannot be classified as used paper, so it must be excluded from the used paper processing system.
On the other hand, among the "papers", for example, those having a high degree of bonding such as a plastic film or an aluminum foil can be excluded from the used paper processing system.

For example, in order to separate laminated paper and the like, a material (material) measurement is required. Therefore, it is desirable to measure the material (material) using the hyperspectral camera 43.
The hyperspectral camera 43 can divide a wide wavelength range from visible light to short-wave infrared range (SWIR) into fine wavelength ranges and acquire light intensity (wavelength spectrum) in each wavelength range. For example, a near-infrared region (around 750 to 1700 nm) can be photographed. Reference numeral 46 denotes a light source having a wavelength from visible light to a near infrared region.
Molecules constituting a substance make various movements. When light is applied to the moving molecules, only light having a specific wavelength is absorbed according to the state of movement. The wavelength in the infrared region to be absorbed has a value determined by the distance between atoms constituting the molecule and the direction of vibration, and has a characteristic wavelength distribution that accurately represents the type of molecule. By examining the reflected / absorbed wavelength distribution (absorption spectrum), it is possible to know what kind of molecules the measurement target contains. According to such a principle, the material (material) can be measured.

19 to 24 show examples of the absorption spectrum distribution. Since cellulose and plastics have a clearly different absorption spectrum wavelength distribution, it is easy to discriminate between contraindicated products and used paper for used newspaper pulp, for example.
By the way, when the cellulose component is dominant, that is, when there is a high probability of being used paper for used newspaper pulp, the intensity waveform of the near-infrared reflected wave clearly appears as a waveform having a deep valley in the range of 1440 to 1490 nm.
On the other hand, in other plastics, a waveform valley appears around 1670 nm and around 1730 nm, and the waveform of the valley also shows a characteristic material. Therefore, it is possible to discriminate the material (material) between the plastics.

On the other hand, the color is measured by the color measuring means using the color measuring camera 42. A general CCD camera can be used as the colorimetric camera. The visible light region is separated into red, green, and blue by a color filter or the like, and an image is obtained by acquiring each of them.
In this case, the colorimetric value determined by the colorimetric means is determined based on whether the whiteness is high or not.
If the degree of whiteness is high, it is judged to be used white paper, and discriminated as waste newspaper pulp.If the degree of whiteness is not high, it is colored waste paper and classified as unusable for used newspaper pulp. it can.

The CCD camera scans a predetermined area range of the imaging range in the width direction in the transport direction to obtain colorimetric information. When determining whether or not the whiteness of the colorimetric value is high, it is desirable to make a determination in the HSV color space. This is because the determination in the HSV color space has a high correspondence with the human visual perception.
Note that the present invention does not exclude the use of another RGB color space or the like.

表１の設定範囲の下で、各色要素が表２の範囲（最小値と最大値との間の範囲）内である条件がアンドで成立する場合に、「白色」であると判断し、それ以外のものは、「有色」と判断することができる。
さらに具体的には、搬送物全体のピクセルのうち、白のピクセル数の方が多い、例えば５０％超である場合には、対象物が白いと判定し、それ以外の場合を有色と判定することができる。この例では５０％を分岐基準としたが、他の割合での基準設定も可能である。 The HSV color space can have a setting range as shown in Table 1 below. This setting range can be changed. The reason for the setting range is that, for white, there is no hue bias, H designates the whole area, and there is no hue (again), S designates a small value (0 to 20), and V is large because it is bright. A value is specified.

Under the setting range of Table 1, when the condition that each color element is within the range of Table 2 (the range between the minimum value and the maximum value) is satisfied by AND, it is determined that the color element is “white”. Anything other than "colored" can be determined.
More specifically, if the number of white pixels is larger than the total number of pixels, for example, more than 50%, the object is determined to be white, and otherwise, it is determined to be colored. be able to. In this example, the branch criterion is set at 50%. However, a criterion can be set at another ratio.

The sorting device 50 is operated in a process in which the transported material drops from the transport conveyor 41, for example, in relation to the transport speed of the transport conveyor 41 with respect to the transported material that has been discriminated (separated) by the discrimination (separation) device 40.
Although the sorting can be performed manually, it is preferable to use an automatic means.
In the embodiment, the air is blown off and sorted by an air compressor (not shown).

  That is, when the used white paper reaches the downstream end of the conveyor 41, the first air nozzle 51 is operated and collected in the first collection container 53, and when the used colored paper reaches the downstream end of the conveyor 41, Then, the second air nozzle 52 is operated, and the second air nozzle 52 is collected in the second collection container 54. Non-white used paper and non-colored used paper can be directly dropped from the downstream end of the conveyor 41 and collected in the third collection container 55 without operating the air nozzle.

Here, when the width of the conveyor 41 is wide, a plurality of articles are conveyed in the width direction, so that a plurality of the air nozzles can be arranged in the width direction.
In addition, in addition to dividing the collecting direction into the conveying direction as shown in the illustrated example, sorting and collecting can be performed by blowing the air toward the outside in the width direction downstream of the conveying conveyor 41. In addition, blowing off by air may be performed on the conveyor 41.

  White waste paper can be used as a raw material for newspaper pulp and the like, and colored waste paper can be used as a raw material for cardboard waste pulp and the like. FIG. 1 illustrates a form in which white used paper 7 and colored used paper 8 are packed by a baler 9 and used later.

The white recovered paper recovered as described above can be used as a material for waste newspaper pulp (NDIP) or a material for waste magazine pulp (MDIP), and can be recycled as newsprint or recycled PPC paper. For colored waste paper, it can be used as a material for corrugated waste paper pulp (WP).
Magazine wastepaper pulp (MDIP) can be manufactured with the same pulp manufacturing equipment (flow) as used newspaper wastepaper pulp (NDIP). In the case of producing various kinds of wastepaper pulp, it can be produced by an existing or known pulp production facility, but it is most suitable to produce in the following embodiment.

FIG. 11 shows an example of manufacturing corrugated paper pulp (WP) from the collected colored waste paper.
This embodiment is as follows.
(1) Dry crushing process of collected colored waste paper (2) Disintegration process using high-concentration pulper (3) Rough selection process including slashing process using a refresher-type screen (4) Pre-stage cleaner, hole screen, slit screen, post-stage The second rough selection step in the order of the cleaners (5) The dewatering step (6) The hole screen reject in the fine selection step includes the disaggregation dispersion consisting of the rotor and the round hole cylindrical basket, and the fine screen reject recovery step of the slit screen and / or the drum screen. Have

To explain a specific example, the collected colored waste paper (veil) 7 is crushed by a crusher 61 in a dry manner as needed.
For example, the crushed material cut to a width of 35 mm is preferably crushed by the high-concentration pulper 62, preferably using a continuous high-concentration pulper, and more preferably while obtaining steam.
The heavy foreign matter is temporarily stored in the tank 63 while being separated by the separator 78. Subsequently, the foreign matter is separated by a sorter 64 including a flash sorter (refeller type screen) for performing the first rough selection process, and stored in a tank 65. After that, it is sent to the tank 67.
Subsequently, heavy foreign substances are removed by the former-stage cleaner 68, sent to the hole screen 69, and large dust such as a laminate, and a gold-silver laminate are separated and stored in the tank 72.
Thereafter, fine foreign matter is removed by the slit screen 73 and stored in the tank 74.
Subsequently, fine foreign matter is removed by the latter-stage cleaner 75, dewatering is performed by a filter 76, for example, a drum-type pulp filter, and temporarily stored in a tank 77 as waste paper pulp.
On the other hand, the rejected portion of the hole screen 69 in the first roughing process is supplied to a disintegrating and dispersing machine (combi-sorter) 71 having a rotor and a round-hole cylindrical basket and having both functions of disintegration and separation, and a gold-silver laminate. Collect the fiber content inside.

FIG. 12 shows an example of producing used newspaper pulp (NDIP) from the recovered white used paper.
The used white paper 7 is disintegrated by a pulper 80 and is roughly selected by a turbo separator 81, a high-concentration cleaner 82 and a roughing screen 83. Subsequently, after being deinked by a pre-flotator 84, it is cleaned by a cleaner 85 and a screen 86. It is carefully selected and dehydrated by a dehydrator 87. Thereafter, foreign matter is dispersed by a hot disperser 88, bleached in a hydrogen peroxide tower 89, deinked by a post-floater 90, dehydrated by a dehydrator 91, and deconcentrated by a high-concentration pump 92. To a paper machine (not shown).
In addition, as a method for producing used newspaper pulp (NDIP) from the recovered white used paper, in addition to the above-mentioned example of producing corrugated cardboard pulp, a deinking treatment process such as a floating sorting process (floatator) is combined. Pulp can be produced.

  The definition of contraindications changes over time. The sorting criteria can be changed accordingly. The present invention is not limited to the use of the above-described apparatus in carrying out the method for processing waste paper packaged articles including contraindicated articles, and some of the steps can be performed manually or semi-automatically by using equipment in combination. Waste paper packaging is not limited to compressed packaging. Further, the use destination and the disposal destination of the recovered waste paper can be appropriately selected, and are not limited to the above example.

  The following is a list of embodiments that can be incorporated in the present invention.

[Aspect 1]
A separation device that separates the crushed material based on the size and obtains the separated separated material,
A number of transport shafts provided with a large number of transport disks along the longitudinal direction of the rotating shaft are provided in parallel in the transport direction and spaced apart in the transport direction,
The transport disk has an outer peripheral surface in which a distance between each point of a locus formed by the outer peripheral surface and the rotation axis gradually changes from large to small, and then changes from small to large.

[Aspect 2]
A waste paper pulp raw material manufacturing apparatus used to crush a waste paper packaged product including a contraindicated product by a crushing device, obtain a crushed material, and supply the crushed crushed material to a used paper pulp manufacturing process,
The crusher,
Having at least two substantially parallel first and second support shafts that rotate about an axis;
In each of the support shafts, a plurality of crushing blades protruding radially outward are provided at intervals in the axial direction,
The crushing blade has a hook-like portion at least in the outer peripheral portion, and the position of the hook-like portion of the crushing blade group along the axis direction is different in the direction around the axis.
The support shaft having the crushing blade is disposed in a casing.

[Aspect 3]
An unpacking process for unpacking waste paper packaged products consisting of a mixture with contraindicated products;
A crushing step of crushing the mixture unpacked by the unpacking step,
The crushed material crushed by the crushing process, the separation step of separating on the basis of size, for the large crushed material separated in the separation step, a discrimination step including the following discrimination step,
This discrimination process
(1) dispersing means for dispersing the crushed material in the transport direction;
(2) colorimetric means for performing colorimetry using a colorimetric camera on the transported object group dispersed by the dispersing means, and material measuring means for measuring the material by a hyperspectral camera;
(3) a first discrimination step of judging whether or not the whiteness of the colorimetric value by the colorimetric means is high for each transported object;
(4) a second discriminating step of judging whether or not the cellulose component is dominant based on the absorbance spectrum measured by the material measuring means for each transported object,
A sorting step of sorting based on a discrimination criterion in at least a first discrimination step and a second discrimination step in the discrimination step;
In order,
In the sorting step, (5) the whiteness of the colorimetric value is high, and when the cellulose component is dominant, the waste paper is white; (6) the whiteness of the colorimetric value is low, and When the cellulose component is dominant, the waste paper is classified as colored waste paper,
What is claimed is: A method for treating waste paper packaged articles, including contraindicated articles.

[Aspect 4]
The conveyed object group dispersed by the dispersing unit is conveyed on a conveyor, and a colorimetric camera and a hyperspectral camera are installed on the conveyor.

[Aspect 5]
The transported object group dispersed by the dispersing means is transported on a transport conveyor, and opposed to the transport conveyor, with a colorimetric camera and a hyperspectral camera installed,
At the time when the conveyed product group is discharged from the conveyer, a sorting nozzle for spraying and discharging the discharged conveyed product with air is provided, and sorting is performed based on a difference in the position of the conveyed product.

[Aspect 6]
The method for treating waste paper packaged articles including contraindicated articles according to claim 1, wherein the case where the intensity waveform of the reflected wave of near-far infrared rays has a deep valley in the range of 1440 to 1490 nm is discriminated as the cellulose component is dominant. .

[Aspect 7]
When determining whether the whiteness of the colorimetric values in the discrimination process is high, the determination is made in the HSV color space.

  Various kinds of waste paper can be collected for effective use of resources and environmental protection.

DESCRIPTION OF SYMBOLS 1 Compression packing goods 7 White waste paper 8 Colored waste paper 10 Crushing device 10A Support shaft 10B Crushing blade 10C Hook-shaped part 20 Separation device 20A Rotating shaft 20B Small transport disk 20C Large transport disk 20D Opening 20A First rotary shaft 20A Rotating shaft 30 of 2 Feeder 40 Discrimination (separation) device 50 Sorting device 102 Hopper 103 Crushing unit 104 Support member

Claims (5)

The packaged waste paper is crushed by a crusher to obtain a crushed material, and the crushed crushed material is discriminated, and the discarded waste paper material is supplied to a used paper pulp manufacturing process to produce used paper pulp. The method,
The color of the crushed material is measured using a colorimetric camera, the whiteness of the measured colorimetric value is determined to be high or low, and the low whiteness is obtained by discriminating,
The obtained raw material is supplied to the waste paper pulp manufacturing process to produce waste paper pulp.
A method for producing waste paper pulp from waste paper packaging.   The method according to claim 1, wherein the crushed crushed material is separated on a size basis, and the separated large crushed material is subjected to the discrimination process. A dry crushing step of dry crushing the waste paper raw material,
Disintegration step of disintegrating by high-concentration pulper after the dry disintegration step,
A separation step of separating heavy foreign matter after the disaggregation step,
After the separation step, a pre-cleaner, a hole screen, a slit screen, and a post-selection step of carefully selecting the post-stage cleaner,
Having a dehydration step of dehydrating after the selective step,
The method for producing waste paper pulp from waste paper packaged goods according to claim 1, wherein the first foreign matter removed by the hole screen and the second foreign matter removed by the slit screen are fed into the pre-stage cleaner.     Waste paper packaging contains contraindicated products, for the crushed material, determine whether the cellulose component is dominant based on the absorbance spectrum measured by a hyperspectral camera, the whiteness is low, and the cellulose component 2. The method for producing waste paper pulp from waste paper packaged goods according to claim 1, wherein when waste is dominant, the raw material is used as an acquisition raw material to be supplied to the waste paper pulp production process. A crusher for crushing waste paper packaging,
The color of the crushed material crushed by the crushing device is measured using a colorimetric camera, and it is determined whether the whiteness of the measured colorimetric value is high or low. Discriminating means for discriminating as a raw material,
Means for supplying the waste paper raw material after the discrimination process to the waste paper pulp manufacturing process;
Waste paper pulp manufacturing equipment for manufacturing waste paper pulp,
An apparatus for manufacturing waste paper pulp from waste paper packaging.

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