JP2001336077A - Regenerated pulp separator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a regenerated pulp separator capable of collecting pulp as the main feedstock and contaminants including polymers, coating paper materials and heat seal parts through efficiently separating them from each other. SOLUTION: This regenerated pulp separator works as follows: feedstocks continuously fed into the respective front stages of treatment chambers 2a, 2b and 2c and then transferred successively into rear-stage treatment chambers while opening/beating them with the corresponding opening cylinders 3a, 3b and 3c, the feedstocks are separated into pulp and the other contaminants based on specific gravity differences by the aid of suction airflow subjected to the upper parts of the respective treatment chambers, and only the pulp is separated and collected by the aid of suction airflow via the respective upper parts of the treatment chambers 2a, 2b and 2c, while the contaminants are allowed to fall by their own weights, discharged and separated via separatory lattice members 4a, 4b and 4c out of the treatment chambers and then collected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a separator for recycled pulp suitable for reusing cut waste, rejects and the like generated in the process of manufacturing pulp products containing high-molecular polymers such as disposable diapers and napkins. It is.

[0002]

2. Description of the Related Art Paper diapers, napkins and the like are made of a pulp as a main raw material in which a high-absorbent high-molecular polymer is mixed, and the outside of a core material is coated with a soft and strong coated paper material having high strength. . These are made into a sheet of a predetermined size, heat-sealed in small pieces into product sizes, and trimmed and cut into individual products.

[0003]

In the manufacturing process of the above-mentioned products, it is necessary to re-use, in particular, cut debris such as ears generated in the trimming cutting process and defective products generated in other processes. Have been. In this reuse, the pulp used as the main raw material, the high-molecular polymer, and the thermosetting portion of the resin adhesive such as the coated paper material and the heat seal portion are included as impurities in the cut waste and defective products. It is necessary to separate and collect them.

However, conventionally, there is no device for efficiently separating and recovering the above-mentioned target object, and a new device has been required to be developed.

[0005] Accordingly, the present invention provides a pulp as a main raw material,
It is an object of the present invention to provide a recycled pulp separator capable of efficiently separating and collecting a high-molecular polymer and impurities such as a coated paper material and a heat seal portion.

[0006]

In order to achieve the above object, a recycled pulp separator according to claim 1 of the present invention has a plurality of processing chambers formed in multiple stages and arranged alternately in the circumferential direction of the outer peripheral surface. A plurality of opening cylinders having a plurality of opening members and a feeding and battering member, and a plurality of opening cylinders rotatably installed in each processing chamber,
A plurality of separation grid members arranged in an arc shape at the bottom of each processing chamber corresponding to the lower half peripheral portion of the fiber opening cylinder, and the raw material continuously supplied to the preceding stage of the processing chamber is subjected to the fiber opening While opening and battering with a cylinder, transfer to the subsequent processing chambers sequentially, and separate the pulp and other contaminants / impurities by the suction air flow acting on the upper part of each processing chamber with a specific gravity difference, and only pulp Are separated and collected from the upper part of each processing chamber by a suction air flow, and other contaminants and contaminants are dropped, discharged, and separated from the separation grid member to the outside of the processing chamber by their own weights, and are collected. .

According to a second aspect of the present invention, in the separator for reclaimed pulp, the fiber-spreading member of the fiber-spreading cylinder includes a substrate extending in the axial direction of the cylinder, and a tip implanted in the substrate having a sharp tip. The feed / battering member extends in the axial direction of the cylinder; a feed plate portion formed upright over the entire length of the substrate in the axial direction; And a comb tooth-shaped battering blade portion which is fixed at appropriate intervals in the axial direction and protrudes radially outward from the feed plate portion.

Further, in the separator for reclaimed pulp according to claim 3 of the present invention, each of the opening cylinders and the separation grid member at the bottom of each processing chamber can relatively adjust a gap therebetween. It is characterized by being supported.

According to a fourth aspect of the present invention, in the separator for reclaimed pulp, a shutter for adjusting a transfer amount of the spread material to a subsequent stage is provided at a boundary between the processing chambers so as to be adjustable in height. It is characterized by having been done.

[0010] The separator for reclaimed pulp according to a fifth aspect of the present invention is characterized in that it comprises a damper for adjusting a flow of suction air from above each of the processing chambers.

[0011] In the separator for reclaimed pulp according to claim 6 of the present invention, the separation grid member at the bottom of each of the processing chambers is roughened from a front stage to a rear stage.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1A is a schematic side view of a main part of a recycled pulp separator according to the present invention, and FIGS.
FIG. 2 is an explanatory view showing an example of the shape of the grids of the separation grid member at the bottom of each processing chamber, FIG. 2A is a front view as viewed from the axial direction of the fiber opening cylinder, and FIGS. The end view and front view of the member are shown, and (D) and (E) are the end view and front view of the feed and batting member.

In FIG. 1, reference numeral 1 denotes a separator body, 2a, 2
b, 2c are processing chambers, 3a, 3b, 3c are opening cylinders,
4a, 4b, 4c are separation grid members, 5a, 5b, 5c,
5d is a shutter, 6 is a material supply port, 7a, 7b, 7c
Is a pulp collecting port, 8a and 8b are air flow distribution guides, 9a,
9b denotes a pulp collection duct and 10 denotes a damper.

The separator body 1 includes a plurality of processing chambers 2a, 2
b and 2c are formed in multiple stages (three stages in the illustrated example) in a slanted shape in which the height is increased from the horizontal direction to the rear stage. A raw material supply port 6 is formed in the upper half of the front processing chamber 2a. Room 2
a, 2b, 2c, pulp collecting ports 7a, 7b,
7c is formed.

In each of the processing chambers 2a, 2b, and 2c, a fiber-opening cylinder 3a, 3b, or 3c is installed so as to be individually height-adjustable. Arc-shaped separation grid members 4a, 4b, 4 corresponding to
c is installed. The opening cylinders 3a, 3b, 3
Instead of individually adjusting the height of c, the mounting height of the separation grid members 4a, 4b, 4c may be adjusted. In any case, this configuration is used to adjust the gap between each of the opening cylinders 3a, 3b, and 3c and the separation grid members 4a, 4b, and 4c so that opening and separation are optimized according to the raw material. And one or both may be adjustable.

Each of the opening cylinders 3a, 3b and 3c is shown in FIG.
(A), a plurality of fiber-spreading members 11 and a feed-and-cotton member 1 alternately arranged in a circumferential direction of a substantially cylindrical outer peripheral surface.
2 and is rotatably installed in each of the processing chambers 2a, 2b, and 2c. FIG. 2A shows a case in which three opening members 11 and three feed / battering members 12 are alternately attached to the outer peripheral surfaces of the opening cylinders 3a, 3b, and 3c at an angle of 120 °. However, the number of attachments can be appropriately increased or decreased.

As shown in FIGS. 2B and 2C, the fiber-spreading member 11 of each of the fiber-spreading cylinders 3a, 3b, and 3c is provided with a substrate 11a extending in the axial direction of the cylinder and a substrate 11a. The tip provided has a sharp needle 11b,
Further, the feed and tapping member 12 has a substrate 12a extending in the axial direction of the cylinder, a feed plate portion 12b formed upright over the entire length of the substrate 12a in the axial direction, and an axial direction of the substrate 12a. A comb tooth-shaped batting blade portion 12c fixed at appropriate intervals and protruding radially outward from the feed plate portion 12b. The height of the needle 11b of the fiber opening member 11 is substantially the same as the height of the feed plate portion 12b, and the feed plate portion 12b is formed by bending a series from the substrate 12a. The comb-shaped battering blade portion 12c has a rectangular plate shape, and is fixed to the upper surface of the substrate 12a and the rear surface in the rotation direction of the feed plate portion 12b.

Each of the separation grating members 4a, 4b, 4c is installed in an arc shape at the bottom of each of the processing chambers 2a, 2b, 2c corresponding to the lower half peripheral portion of the opening cylinder 3a, 3b, 3c. Each of the separation grating members 4a, 4b, and 4c is roughened from the front stage to the rear stage. For example, as shown in FIG. 1B, the high-water-absorbing high-molecular polymer (particulate) mixed in a disposable diaper or a napkin can pass through the separation lattice member 4a at the bottom of the processing chamber 2a in the former stage. And a slit plate having a large number of slit holes 4a 'formed in a staggered arrangement, and the longitudinal direction of the slit holes 4a' is parallel to the axial direction of the fiber opening cylinder 3a, and the processing at the preceding stage of the separator body 1 is performed. It is attached to the bottom of the chamber 2a. The separation grid member 4b at the bottom of the middle processing chamber 2b is shown in FIG.
As shown in (1), a slit plate similar to that of the preceding stage is used, and the slit hole 4b 'is attached to the bottom of the middle processing chamber 2b with the longitudinal direction orthogonal to that of the preceding stage. As shown in FIG. 1D, the separation grid member 4c of the processing chamber 2c at the subsequent stage has a grid bar 4 having a triangular cross section.
c ′ are arranged in parallel with the axial direction of the opening cylinder 3c to form a large number of horizontally long slits at equal intervals, and the angle of each grid bar 4c ′ is adjusted so that the opening degree of the horizontally long slits can be adjusted from fully closed to fully open. Are installed so that they can be changed at once.

The shutters 5a, 5b, 5c, and 5d are installed above and below each of the processing chambers 2a, 2b, and 2s, and the lower ones are installed so as to be individually adjustable in height. It controls the transfer amount of the raw material.

The air flow distribution guides 8a, 8b are installed above the boundaries between the processing chambers 2a, 2b, 2c in order to distribute the suction air flow to the pulp recovery ports 7a, 7b, 7c.

The pulp collecting ducts 9a and 9b are connected to the pulp collecting ports 7a, 7b and 7c as shown in FIG. 1A, and are connected to a pulp collecting box via a pipe (not shown). An intake fan is connected to the pulp collection box, whereby the pulp collection ducts 9a and 9b are connected.
, A suction air flow is generated at the pulp collection ports 7a, 7b, 7c.

The damper 10 is provided in each of the processing chambers 2a, 2b, 2
This is for adjusting the suction airflow from the upper part of the pulp c. In FIG. 1A, the degree of opening is adjustable at the pulp recovery port 7c of the processing chamber 2c in the latter stage.

The configuration of the embodiment of the recycled pulp separator according to the present invention is as described above. Next, the operation thereof will be described. Each of the opening cylinders 3a, 3b, 3c is driven at the same rotational peripheral speed or at a later stage at a higher speed, and an intake fan connected to the pulp collection ducts 9a, 9b is driven to drive the processing chambers 2a, 2b, 2c. Pulp collection ports 7a, 7 at the top
A suction air flow is generated in b and 7c. In this state, first, raw materials to be opened, for example, raw materials such as cut waste and defective products generated in a manufacturing process such as disposable diapers and napkins are continuously supplied from the raw material supply port 6 into the processing chamber 2a in the preceding stage. You. The raw material supplied to the processing chamber 2a at the preceding stage is opened by the needle 11b of the opening member 11 attached to the outer peripheral surface of the opening cylinder 3a.
Is fed while being beaten by the feed plate portion 12b and the comb-like battering blade portion 12c. Since the fiber-spreading member 11 and the feed-and-cotton member 12 are alternately attached to the fiber-spreading cylinder 3a, the raw material supplied into the processing chamber 2a at the preceding stage is subjected to the fiber-spreading action by the needle 11b and the feed plate portion 12b. The fiber is gradually opened by alternately receiving the battering action of the comb-like battering blade portion 12c. For example, the coated paper material is crushed into a piece of paper, the pulp and the high molecular polymer are scraped out from the inside, and the pulp is loosened to facilitate the separation of the high molecular polymer from the pulp. Resin or rubber-like solid matter such as a seal portion is also crushed into small pieces. As a result, the particulate matter of the high-molecular polymer having a large specific gravity is formed in the slit hole 4 of the separation lattice member 4a at the bottom of the processing chamber 2a at the previous stage.
The pulp dropped and discharged from a ′ and having a low specific gravity is separated and collected in a pulp collection box or the like via a pulp collection duct 9a and a connection pipe by a suction air flow from a pulp collection port 7a at an upper portion of the processing chamber 2a. The resin or rubber-like solid matter and the crushed coated paper material that are heavier than the pulp are sequentially sent from the middle stage to the subsequent stage. Note that a part of the pulp tends to fall from the separation grid member 4a, but since the depressurizing action of the suction air flow extends to each of the processing chambers 2a, 2b, and 2c, the pulp passes through the separation grid member 4a. Since the outside air flows in from and is collected by the suction air flow, the collection efficiency is high. In the processing chamber 2b in the middle stage, the same opening operation and battering operation as described above are performed by the opening cylinder 3b, and the pulp, the high molecular polymer, and other impurities are separated. Then, in the processing chamber 2c at the subsequent stage, the opening cylinder 3c
In this case, the pulp is further separated into pulp, high molecular weight polymer, and other contaminants, and the pulp having a low specific gravity is discharged from the pulp collection port 7c by a pulp collection duct 9b. Then, the contaminants such as high polymer polymer or resin or rubber having a large or heavy specific gravity are dropped and discharged from the slits of the grid bar 4c 'of the separation grid member 4c at the bottom. In order to appropriately perform the opening and separating operations in the processing chambers 2a, 2b, and 2c, the processing chambers 2a,
Shutters 5a, 5b installed at the boundary between 2b and 2c;
The height of 5c and 5d is appropriately adjusted, and the opening degree of the damper 10 is appropriately adjusted in order to appropriately distribute the suction air flow. In addition, the damper 10 can also be installed in the pulp collection duct 9a.

The pulp and the high-molecular polymer separated and recovered as described above are appropriately post-treated and recycled.

In the above embodiment, the case where the processing chamber has three stages is shown. However, the number of stages may be appropriately increased or decreased according to the nature or state of the raw material. In addition, the present invention relates to each processing chamber 2a, 2
It is preferable that the processing is performed while keeping the inside of b and 2c in a dry state (for example, controlling the humidity to 60% or less). For this purpose, the humidity of the entire room may be controlled within a predetermined range, or hot air may be blown from above the separator body 1.

[0026]

According to the first aspect of the present invention, raw materials such as cut debris and defective products generated in a manufacturing process such as disposable diapers and napkins are continuously and efficiently opened in a plurality of processing chambers to produce pulp. High molecular weight polymer and other impurities can be separated and recovered with a specific gravity difference.

According to the second aspect of the present invention, the raw material can be continuously opened and battered efficiently in each processing chamber.

According to the third aspect of the present invention, the gap between the opening cylinder and the separation grid member is adjusted so as to be in an optimum state for each processing chamber according to the supply amount and properties of the raw material and the opening state. can do.

According to the fourth aspect of the present invention, the height of the shutter is adjusted so that the time during which the raw material stays in each processing chamber and is subjected to the fiber opening processing or the amount to be fed into the next processing chamber is optimized for each processing chamber. Can be adjusted.

According to the fifth aspect of the present invention, the distribution of the suction air flow can be easily performed by adjusting the opening degree of the damper so that the pulp separated and separated in each processing chamber is properly collected. .

According to the sixth aspect of the present invention, in separating the pulp from the high-molecular polymer and other contaminants, the pulp and the other contaminants are not dropped in the pre-treatment chamber, and mainly the high-molecular polymer is not dropped. Only high-polymers and other contaminants from the next stage are dropped and carried out, and large contaminants can be dropped and discharged at the end, increasing the pulp recovery rate. Can be.

[Brief description of the drawings]

FIG. 1A is a schematic side view of a main part of a recycled pulp separator according to the present invention, and FIGS. 1B, 1C, and 1D show examples of grid shapes of a separation grid member at the bottom of each processing chamber. FIG.

FIG. 2A is a front view of the fiber-spreading cylinder viewed from the axial direction, FIGS. 2B and 2C are end views and a front view of the fiber-spreading member,
(D) and (E) are an end view and a front view of the feed / cotton member.

[Explanation of symbols]

 1 Separator body 2a, 2b, 2c Processing chamber 3a, 3b, 3c Opening cylinder 4a, 4b, 4c Separation grid member 5a, 5b, 5c, 5d Shutter 6 Raw material supply port 7a, 7b, 7c Pulp recovery port 8a, 8b Air flow distribution guide 9a, 9b Pulp collection duct 10 Damper 11 Spreading member 12 Feeding and battering member

Continued on the front page (72) Inventor Kazuo Nishimura 2-7-8 Mino, Kawanishi-shi, Hyogo F-term in Ohara Iron Works, Ltd. 4L055 CA03 CA09 FA07 FA22

Claims (6)

[Claims] 1. A processing chamber having a plurality of processing chambers formed in multiple stages, a plurality of opening members and a feeding / cotting member alternately arranged in a circumferential direction of an outer peripheral surface, and are rotatably installed in each processing chamber. A plurality of opening cylinders, comprising a plurality of separation grid members provided in an arc shape at the bottom of each processing chamber corresponding to the lower half peripheral portion of the opening cylinder, continuously in front of the processing chamber The supplied raw material is sequentially transferred to the subsequent processing chambers while opening and battering by the opening cylinder, and the pulp and other contaminants / contaminants are removed by the suction air flow applied to the upper part of each processing chamber. Separation by specific gravity difference, only pulp is separated and collected from the upper part of each processing chamber by suction air flow, and other contaminants and contaminants are dropped and discharged from the separation grid member to the outside of the processing chamber by their own weight, and are separated and collected. A recycled pulp separator characterized by the following. 2. The fiber-spreading member of the fiber-spreading cylinder has a substrate extending in the axial direction of the cylinder, and a needle having a sharp tip implanted in the substrate. A cotton member is fixed to the substrate extending in the axial direction of the cylinder, a feed plate portion formed upright over the entire length in the axial direction of the substrate, and fixed at appropriate intervals in the axial direction of the substrate, 2. The recycled pulp separator according to claim 1, further comprising a comb-shaped battering blade portion protruding radially outward. 3. The regeneration according to claim 1, wherein each of the opening cylinders and a separation grid member at the bottom of each processing chamber are supported so that a gap between them can be relatively adjusted. Pulp separator. 4. The shutter according to claim 1, wherein a shutter for adjusting a transfer amount of the spread material to a subsequent stage is installed at a boundary between the processing chambers so as to be adjustable in height. A separator for recycled pulp according to the present invention. 5. The reclaimed pulp separator according to claim 1, further comprising a damper for adjusting a flow of suction air from an upper portion of each of the processing chambers. 6. A separation grid member at the bottom of each processing chamber,
The separator for reclaimed pulp according to any one of claims 1 to 5, wherein the separator is roughened from a first stage to a second stage.