JP2003306881A - Waste paper treating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waste paper treating apparatus for separating a foreign matter mixed in a waste paper from a waste paper pulp, in which the waste paper is continuously disintegrated in a high concentration and the foreign mater mixed in the waste paper can surely be separated. <P>SOLUTION: The waste paper treating apparatus is equipped with a pulper body 501 directly connecting a pulper 2 through a connecting pipe 507 to a screen 8 and treating a waste paper pulp liquid while moving the waste paper pulp liquid in the interior, a pulper rotor 502 provided in the interior of the pulper body 501, a plurality of blade members 503 protrusively provided in the outer periphery of the pulper rotor 502 and used for stirring the waste paper pulp liquid and disintegration-promoting members 520 and 521 protrusively provided toward the pulper rotor 502 in the internal circumference of the pulper body 501 and promoting disintegration of the waste paper by blade members 503. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste paper processing apparatus for separating foreign matter mixed in waste paper from waste paper pulp.

[0002]

2. Description of the Related Art In recent years, with the policy of effective use of resources and waste reduction, a process for laminating food packs such as milk, yogurt, juice, etc., and food trays, etc. has been made into high-quality waste paper materials collected as waste paper. A considerable amount of the recycled high-quality waste paper has been mixed, and the mixed amount tends to increase year by year.

In order to cope with such a situation, there is a demand for a waste paper treatment device for separating a waste paper raw material containing laminated waste paper into vinyl-based foreign matter and waste paper pulp. 8 to 10 show a conventional waste paper processing apparatus, FIG. 8 is a block diagram showing each processing step (processing equipment), FIG. 9 is a schematic sectional view showing the pulper and auxiliary pulper, and FIG.
Reference numeral 0 is a schematic top view showing the rotor and dissociation plate of the pulper.

As shown in FIG. 8, a conventional waste paper processing apparatus includes a conveyor 10 for conveying waste paper, a pulper 20 for disposing of waste paper conveyed by the conveyor 10 and disintegrating the waste paper at a density of 10 to 20%. After treatment, the concentration is 3 ~
Auxiliary pulper 30 that disintegrates at 5% and removes foreign substances
A pump 40 for taking out the waste paper pulp liquid from the pulper 20 and the auxiliary pulper 30, a stirring tank 50 for containing the waste paper pulp liquid taken out by the pump 40, a pump 60 for taking the waste paper pulp liquid out of the stirring tank 50, and a pump 60. It comprises a cleaner 70 for separating heavy foreign matters of the waste paper pulp liquid taken out from the waste paper at a concentration of 0.5 to 4%, and a screen 80 for separating light foreign matters from the waste paper pulp liquid. Although not shown in FIG. 8, in the post-process of the screen 80, the waste paper may be treated by a deinking device, a selective screen, a selective cleaner, and a cleaning device, if necessary.

Now, the pulper 20 and the auxiliary pulper 30 connected to the pulper 20 in the conventional waste paper processing apparatus will be described. As shown in FIG. 9, the pulper 20 is
A container 201 and a container 2 formed below the container 201
A discharge port 20 for discharging the waste paper pulp liquid disintegrated in 01
6, a disaggregation plate 204 arranged so as to cover the opening of the discharge port 206, a rotor 202 provided on the bottom of the container 201 and rotated about a shaft 205 by a rotational drive of a motor 209, and a lower portion of the rotor 202. The rotor 203 includes a rotor 203 that rotates together with the rotor 202, and a discharge port 207 that discharges foreign matter and waste paper pulp that have not been disintegrated in the pulper 20 to an auxiliary pulper 30 to be described later. A seal 208 is provided at a sliding contact portion between the container 201 and the shaft 205 in order to prevent leakage of the waste paper pulp liquid charged in the container 201.

The rotor 202 is formed in a screw shape whose diameter gradually increases from the upper part to the lower part. Further, as shown in FIG. 10, the rotor 203 is formed in a disc shape having a plurality of blades 203a.
The rotor 202 and the rotor 203 formed in this way
However, by rotating integrally around the shaft 205, the waste paper pulp liquid charged in the container 201 is stirred,
The waste paper contained in the waste paper pulp liquid is disintegrated by the shearing action generated between the rotor 203 and the disintegration plate 204.

As shown in FIG. 10, the disaggregation plate 204 includes:
A large number of holes 204a having a diameter of 10 to 15 mm are formed. Therefore, after the waste paper is disintegrated by the rotor 202 and the rotor 203, it is diluted to a concentration of 3 to 5%, and the pump 4
0 (not shown in FIG. 9), the waste paper pulp liquid is sucked by the holes 204a and the discharge port 20.
It is configured to be discharged to the agitation tank 50 through 6.

On the other hand, the auxiliary pulper 30 is, as shown in FIG. 9, a container 301, a discharge port 306 formed on the right side of the container 301 for discharging the waste pulp pulp liquid disaggregated in the container 301, and the discharge port 306. The disaggregation plate 304 arranged so as to block the opening of the outlet 306, the rotor 303 arranged on the right side of the container 301 and rotated about the shaft 305 by the rotational driving of the motor 309, and the disintegration remaining by the pulper 20. Input port 307 into which foreign matter and waste paper pulp liquid are input
And a discharge port 311 formed at the bottom of the container 301 for discharging heavy foreign matter, and a discharge port 310 formed at the top of the container 301 for discharging lightweight foreign matter. In addition, in order to prevent leakage of the waste paper pulp liquid put in the container 301, a seal 30 is attached to a sliding contact portion between the container 301 and the shaft 305.
8 are provided.

The rotor 303 is the pulper 20 shown in FIG.
Similar to the rotor 203, it is formed in a disk shape having a plurality of blades 303a. The rotor 303 thus formed rotates about the shaft 305 to agitate the waste paper pulp liquid charged in the container 301, and the waste paper is removed by the shearing action generated between the rotor 303 and the disaggregation plate 304. It is designed to disaggregate.

The disaggregation plate 304 has a diameter of 10 to 15 mm, like the disaggregation plate 204 of the pulper 20 shown in FIG.
A plurality of holes 304a are formed in the rotor 303
The waste paper pulp disaggregated by the pump 40 (not shown in FIG. 9) is supplied to the hole 304a and the discharge port 306.
It is designed to be discharged to the agitation tank 50 through.

Since the conventional waste paper processing apparatus is configured as described above, first, the so-called batch processing (intermittent processing) is performed to first dispose the waste paper together with the dilution water into the container 20 of the pulper 20.
It is thrown into No. 1 and agitated by the rotor 202 and the rotor 203 at a concentration of 10 to 20%, and the waste paper is disaggregated by mutual friction and shearing action. After the disintegration treatment, the waste paper pulp liquid is diluted to a concentration of 4 to 5% in the pulper 20 and discharged from the discharge port 206 to the stirring tank 50 through the hole portion 204a of the disaggregation plate 204.

On the other hand, the waste paper pulp liquid containing the foreign matter remaining without being disaggregated passes through the discharge port 207 of the container 201 and the charging port 307 of the auxiliary pulper 30 and the container 30 of the auxiliary pulper 30.
Move to 1. Then, the waste paper pulp liquid that has moved to the container 301 is stirred by the rotor 303, and the waste paper pulp in the waste paper pulp liquid is disaggregated by mutual friction. At this time, the disintegrated waste paper pulp is discharged from the discharge port 306 to the stirring tank 50 through the hole 304a of the disaggregation plate 304. Also,
Heavy foreign matter in the waste paper pulp liquid sinks at the bottom of the container 301,
The lightweight foreign matter in the waste paper pulp liquid is discharged to the outside through the discharge port 311 and floats above the container 301, and the discharge port 310 is discharged.
Is discharged to the outside through.

[0013]

By the way, in the conventional waste paper processing apparatus, most of the waste paper thrown into the container 201 of the pulper 20 is near the rotor 202 and the rotor 203 where substantial disaggregation processing is performed by mutual friction. In many cases, the waste paper is not concentrated on the (disaggregation action portion) and turns at a position away from the rotor 202 and the rotor 203, and the disaggregation effect of waste paper in the pulper 20 is not good.

If the stirring is weak, the waste paper will float,
It does not reach the above disaggregation part. In order to solve this problem, it is conceivable to increase the agitation, but it is necessary to increase the agitation power when the concentration of the used waste paper pulp liquid is increased. Particularly, in the waste paper treatment including the laminated paper, the foreign matter is shredded in the narrow gap (1 to 3 mm) between the rotor 203 and the disaggregation plate 204 in the pulper 20, and not only the waste paper pulp but also the foreign matter is generated in the hole portion 204a. There is a possibility that the foreign matter such as the laminate will pass through, and then part of the foreign matter such as the laminate will grow into a string shape and will be entangled with the impellers of the pumps 40 and 60 and the agitator of the agitation tank 50, thereby deteriorating their performance.

Fine foreign matter that does not grow like a string is
It will pass through the eye of the screen 80 in the subsequent process. In order to prevent this, the holes in the screen 80 have to be made fine, and in order to secure the total flow rate in the screen 80, the size of the screen 80 has to be increased. This also applies to the auxiliary pulper 30, and the narrow gap (1) between the rotor 303 and the disaggregation plate 304 is used.
(About 3 mm), the foreign matter is shredded, and not only the waste paper pulp but also the foreign matter passes through the hole 304a, and the same problem as described above occurs.

As described above, there is a drawback in that both equipment cost and power must be increased. Also, Palpa 20
In the disaggregation treatment at a high concentration (10 to 20%) in, the continuous operation is difficult because it takes time to dilute and discharge,
The processing efficiency per facility is low.

On the contrary, for continuous operation, the disaggregation plate 20 is used.
Due to the restriction of the passage capacity of the hole portion 204a of No. 4, the inside of the container 201 of the pulper 20 has to be low concentration (4 to 5%). When the concentration is low, the mutual friction between the rotor 22 and the rotor 203 and the waste paper pulp is caused. Of the waste paper pulp becomes difficult to be disintegrated, and most of the power is consumed by the circulation of the waste paper pulp, so that the disintegration efficiency is reduced.

Further, in order to increase the passage ability of the hole portion 204a of the disaggregation plate 204, the diameter may be increased or the suction force of the pump 40 may be increased. Because it is easier to pass through
As described above, problems in the post process occur. Further, in the auxiliary pulper 30, since the concentration of the waste paper pulp liquid is low (4 to 5%), the waste paper pulp flows out together with the weight or the lightweight foreign matter, and the yield is deteriorated. Then, in order to avoid this, a foreign matter treatment device is added, and both the equipment cost and the power increase.

When the concentration in the auxiliary pulper 30 is lowered, a large amount of dilution water is used to treat a certain waste paper, and the auxiliary pulper 30 and the pump 40 need to be made larger. The present invention was devised in view of the above-mentioned problems, and provides a wastepaper processing device capable of continuously disintegrating wastepaper at a high concentration and reliably separating foreign substances mixed in the wastepaper with high efficiency. The purpose is to do.

[0020]

Therefore, the waste paper treatment apparatus of the present invention (Claim 1) has a pulper containing waste paper and water, and a foreign matter contained in the waste pulp pulp formed in the pulper. A wastepaper treatment apparatus having a screen for removal, wherein the pulper is directly connected to the screen through a connecting pipe, and the pulper has a pulper body for treating the wastepaper pulp liquid while moving the pulper body inside. A pulper rotor provided inside the pulper body, a plurality of blade members projecting on the outer periphery of the pulper rotor for stirring the waste paper pulp liquid, and a blade member projecting on the inner periphery of the pulper body toward the pulper rotor. It is characterized by having a disaggregation promoting member for promoting disaggregation of waste paper.

The vane member is provided in a radial direction with respect to the axial direction of the pulper rotor, and as the disaggregation promoting member, a plate-shaped first disaggregation provided with a predetermined gap from the vane member. It is preferable that an acceleration member is provided (Claim 2). Of the plurality of blade members, at least the blade member disposed on the upstream side of the pulper into which the waste paper pulp liquid is charged is preferably arranged in a spiral shape (claim 3).

As the disaggregation promoting member, it is preferable that a second disaggregation promoting member extending in the moving direction of the waste paper pulper liquid is provided on the inner peripheral surface of the pulper body (claim 4). The screen has a hollow screen body,
A screen rotor provided in the screen body, the screen rotor having an outer peripheral surface having a gradually decreasing outer diameter and a connecting portion connecting a starting end portion and an end portion of the gradually decreasing portion; It is preferable to provide a screen basket provided in the outer periphery of the screen rotor in the body and having a porosity (claim 5). That is, the screen basket is formed such that the gap between the screen rotor and the screen basket is gradually widened. Further, it is preferable that the gap gradually widens from 3 to 15 (preferably about 8) mm to 10 to 50 (preferably about 40) mm.

The diameter of the hole of the screen basket is preferably 1.5 to 10 mm, more preferably about 6 mm.
mm. It is preferable that the connecting portion has an inclined portion formed on the distal end side and having an increased outer diameter, and an upright portion formed on the start end portion side and standing upright so as to be substantially orthogonal to the outer peripheral surface ( Claim 6).

A discharge port for heavy foreign matter provided on the outer periphery of the screen rotor and below, and a discharge port for waste paper pulp provided on the outer periphery of the screen rotor and above the discharge port for heavy foreign matter. It is preferable that the screen rotor is provided with a lightweight foreign matter outlet provided near the center of rotation of the screen rotor (claim 7). A rotating chamber which is provided close to the discharge port for the lightweight foreign matter and rotates the remaining waste paper pulp liquid from which the heavy foreign matter has been removed, an inlet port for introducing the waste paper pulp liquid into the rotating chamber, and the rotation chamber. It is preferable to have a wing portion provided inside the chamber for rotating the introduced waste paper pulp liquid (claim 8).

It is preferable that a diluting water supply means for supplying diluting water is provided in the rotating chamber (claim 9). Therefore, it is possible to supply the dilution water into the rotation chamber, centrifuge the lightweight foreign matter and the waste paper pulp at a low concentration, and preferentially discharge the lightweight foreign matter.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show a waste paper processing apparatus according to an embodiment of the present invention. FIG. 1 is a schematic sectional view showing a pulper and a screen thereof, and FIG. 2 is a processing step (processing equipment) of the waste paper. FIG. 3, FIG. 3 is a sectional view taken along the line AA in FIG. 1, FIG. 4 is a schematic perspective view showing the screen rotor, and FIG. 5 is an enlarged arrow view showing the starting end portion and the end portion of the screen rotor. FIG. 6 is a sectional view taken along the line BB in FIG. 1 to 6, the same parts as those of the above-described conventional waste paper processing device are denoted by the same reference numerals.

As shown in FIG. 2, the waste paper processing apparatus of the present invention continuously conveys the waste paper carried by the conveyor 10 and the waste paper carried by the conveyor 10 at a density of 6 to 30% (preferably about 15%). Palpa 2 disaggregated into 2, and a concentration of 0.5 to 4% (preferably approximately 2%) after the treatment in Palpa 2
Screen 8 for removing foreign matter with a stirrer, a stirring tank 50 for storing the waste paper pulp liquid discharged from the screen 8, and a pump 60 for taking out the waste paper pulp liquid from the stirring tank 50.
And a cleaner 70 for separating heavy foreign matter with a concentration of 0.5-4% (preferably approximately 1%) in the waste paper pulp liquid taken out from the pump 60. Although not shown in FIG. 2, the waste paper may be treated by a deinking device, a selective screen, a selective cleaner, and a cleaning device in a subsequent step, if necessary.

In this waste paper processing apparatus, the screen 8 is directly connected to the pulper 2 by a connecting pipe 507, and the structures of the pulper 2 and the screen 8 are different from those of the conventional waste paper processing apparatus (FIGS. 9 and 10). It is characterized by doing. Therefore, hereinafter, the characteristic parts of the waste paper processing apparatus according to the present invention, namely, the pulper 2 and the screen 8 will be described.
Will be described in detail.

As shown in FIG. 1, the pulper 2 has a container (pulsar body) 501, a pulper rotor 502, a blade member 503, a first disaggregation promoting member 520, and a second disaggregation promoting main component. And a member 521. The pulper body 501 is formed, for example, in the shape of a cylindrical cavity. The pulper body 501 has an input port 511 for inputting waste paper in the upper part on the upstream side of the pulper body 501, and a pulper body 501 in the upper part on the downstream side of the pulper body 501.
A discharge port 506 for discharging the waste paper pulp liquid disaggregated inside is formed.

Further, the pulper body 501 has a conduit 52.
Pulper body 501 through 3a, 523b and 523c
A dilution water supply means 9 for supplying dilution water is provided inside. With this dilution water supply means 9, the pulper body 5
The concentration of the waste paper pulp liquid in 01 can be controlled. In FIG. 1, the pipe lines 523a, 523b, 5 are sequentially arranged from the upstream side to the downstream side of the pulper body 501.
23c shows a case where 23c is connected.

As shown in FIG. 1, the pulper rotor 502 is formed, for example, in a cylindrical shape, has a shaft 505, is provided in the pulper body 501, and a motor 509 connected to one end of the shaft 505 is rotationally driven. As a result, the pulper rotor 502 rotates about the shaft 505 (rotates in the direction of arrow C in FIG. 3) to disaggregate the waste paper. It should be noted that the pulper body 501 and the shaft 505 are provided in order to prevent leakage of the waste paper pulp liquid introduced into the pulper body 501.
A seal 508 is provided at a sliding contact portion with.

The blade member 503 is provided on the outer periphery of the pulper rotor 502 in a radial direction with respect to the shaft 505. Further, a plurality of blade members 503 are provided so as to radially extend around the shaft 505 (see FIG. 3) and spirally extend from the upstream side to the downstream side of the pulper rotor 502. Further, the blade member 503 has a distance L1 with respect to the inner peripheral surface of the pulper body 501 and a distance L2 with respect to the baffle plate 520 of, for example, 50 to 200 mm (more preferably,
It is formed to have a predetermined value of approximately 125 mm).

Baffle plate 520 as a first disaggregation promoting member
As shown in FIG. 3, plural protrusions are provided on the inner periphery of the pulper body 501 toward the pulper rotor 502 and in the circumferential direction. In addition, the baffle plate 520 is the blade member 50.
The blade member 503 is provided with a predetermined clearance so as not to interfere with the blade member 503. Also, the baffle 520 is
As shown in FIG. 1, a pulper body 50 into which waste paper is loaded
From the upstream side to the downstream side of the pulper body 501 from which the waste paper pulp liquid is discharged, a plurality of protrusions are provided at predetermined intervals,
In addition, from the inner peripheral surface of the pulper body 501 to the pulper rotor 50
The length of the baffle plate 520 in the direction of 2 is formed so as to gradually increase from the upstream side to the downstream side of the pulper body 501 (that is, the area of the baffle plate 520 increases).

Baffle plate 521 as a second disaggregation promoting member
As shown in FIG. 3, a plurality of paper sheets are provided between the baffles 520 in the circumferential direction of the pulper body 501 so as to extend in the moving direction of the waste paper pulper liquid (that is, in the axial direction of the pulper body 501). This baffle plate 521 has a height (height from the inner peripheral surface of the pulper body 501 in the direction of the shaft 505) higher than the above predetermined value so as not to interfere with the tip end portion of the blade member 503 when the pulper rotor 502 rotates. It goes without saying that it is formed short.

By providing such baffles 520 and 521, it is possible to prevent the waste paper pulp from co-rotating with the blade members 503 of the pulper rotor 502, which will be described later, and the waste paper is rubbed against each other by the mutual friction. The 521 and the blade member 503 can be efficiently disintegrated. As shown in FIG. 1, the screen 8 has a screen body 601, a screen rotor 602, and a screen basket 604 as main components.

The screen body 601 has, for example, a cylindrical hollow shape, and has a charging port 607 for charging the waste paper pulp liquid discharged from the pulper 2 and a charging port 607.
A discharge port 615 provided below the screen body 601 and on the outer periphery (bottom portion) of the screen body 601 for discharging heavy foreign matter, and a discharge port 615 for outer periphery of the screen body 601 and heavy foreign matter.
A discharge port 606 is provided above the discharge port for discharging the disintegrated waste pulp and pulp, and a discharge port 610 for discharging the lightweight foreign matter near the shaft 605 of the screen rotor 602.

The screen basket 604 has a cylindrical hollow shape, and the discharge port 60 of the pulp body 601.
It is provided on the outer circumference of the screen rotor 602 in the screen body 601 so as to close the screen 6. Further, the screen basket 604 is formed with a large number of holes 604a having a diameter of 1.5 to 10 mm (more preferably about 6 mm), and functions so that the disintegrated waste paper pulp liquid passes through.

The screen rotor 602 is formed in a cylindrical shape, has a shaft 605, and has a screen body 601.
A motor 6 provided inside and connected to one end of the shaft 605.
09 is driven to rotate, so that the screen rotor 60
2 rotates about an axis 605 to disintegrate waste paper pulp. Further, a plurality of scraping blades 617 are provided on the upstream end surface of the screen rotor 602 to prevent foreign matter from being entangled during the rotation of the screen rotor 602. A seal 608 is provided at a sliding contact portion between the screen body 601 and the shaft 605 in order to prevent leakage of the waste paper pulp liquid.

Further, as shown in FIGS. 4 and 5, on the outer peripheral surface of the screen rotor 602, a gradually decreasing portion (curved surface) 620a having an outer diameter continuously decreasing, and a starting end portion (edge) 651 of the gradually decreasing portion 620a. 620 that connects the end portion 656 with the end portion 656.
b are formed. It should be noted that in FIG.
It shows a case where two a and the connecting portion 620b are formed on the outer periphery of the screen rotor 602.
It is also possible to form only one or three or more. Also,
The gradual reduction unit 6 of the screen rotor 602 in the present embodiment
20a includes a start end 651 and a screen basket 6
The distance from 04 is 3 to 15 (preferably about 8) m
m, and the distance between the end portion 656 and the screen basket 604 is 10 to 50 (preferably about 40) mm, and the outer diameter is gradually reduced (see FIG. 6). In addition, hereinafter, the screen rotor 602
The space between the screen basket 604 and the screen basket 604 is referred to as an annular chamber and is indicated by reference numeral 621.

At the connecting portion 620b, as shown in FIG.
The end portion 656 side is provided, and the starting end portion 6
Inclined portion 6 inclined so that the outer diameter gradually increases toward the 51 side
53 and the screen rotor 6 provided on the starting end 651 side
The outer peripheral surface of 02 (that is, the gradually decreasing portion 620a) and the standing portion 652 which stands up so as to be substantially orthogonal are smoothly and continuously formed. In addition, in FIG. 5, the connecting portion 620 b is configured as a replaceable blade 650, and the bolt 655 is used.
It is attached to the screen rotor 602 by tightening.

Further, the screen rotor 602 is provided with a rotating chamber 657 provided near the light foreign substance discharge port 610 for rotating the waste paper pulp liquid, and an inlet for introducing the waste paper pulp liquid into the rotary chamber 657. Mouth (notch) 613
And a blade portion 612 for rotating the waste paper pulp liquid introduced into the rotation chamber 657. Further, the above-mentioned dilution water supply means 9 supplies dilution water to the rotation chamber 657 through the pipe 523e and the nozzle 611 to reduce the concentration in the rotation chamber 657, and the pipe 523f is connected. The dilution water is supplied to the vicinity of the upstream end surface of the screen rotor 602 via the screen rotor 6
02 foreign matter is prevented from being entangled with the end face, the shaft 605, and the like. Further, the diluting water supply means 9 is provided with the conduit 5
The dilution water can also be supplied to the connection pipe 507 that connects the pulper 2 and the screen 8 via 23d.
As a result, the pressure inside the connecting pipe 507 can be controlled.

Therefore, as shown in FIG. 6, when the screen rotor 602 rotates in the direction of the arrow D, the flow velocity of the waste paper pulp liquid on the inner surface of the screen basket 604 increases due to the gradually decreasing portion 620a near the starting end 651 side. As the component drops, it receives a negative pressure on the inner peripheral side, and the hole 604a
Foreign matter that could not pass through the hole is pulled back and the hole 6
04a can be prevented from being clogged.

Further, the screen basket 604 and the gradually decreasing portion 6 are provided from the starting end 651 to the end 656.
Since the gap between the waste paper pulp 20a and the nozzle 20a is wide, a positive pressure is applied in the vicinity of the end portion 656, and the disintegrated waste paper pulp liquid passes through the hole 604a of the screen basket 604 and the discharge port 60.
It is designed to be discharged from 6. Since the waste paper processing apparatus as one embodiment of the present invention is configured as described above, the waste paper is input from the input port 511 of the pulper body 501 and stirred by the pulper rotor 502. At this time, the dilution water supply means 9 supplies the dilution water into the pulper body 501 via the pipes 523a and 523b so that the concentration of the waste paper pulp liquid is constant [for example, 6 to 30 (preferably approximately 15)%. ], And adjust so that the load is constant. Since the blade member 503 of the pulper rotor 502 is formed in a spiral shape, the thus-diluted waste paper pulp gradually moves to the downstream side of the pulper body 501 while being stirred by the rotation of the pulper rotor 502.

In this process, the waste paper pulp is discharged between the blade member 503 and the baffle plate 520 and the blade member 50.
3 and the baffle plate 521 respectively receive a force, and are reliably disintegrated by mutual friction of the waste paper pulp. Further, since the length (or area) of the baffle plate 520 is increased toward the downstream side, mutual friction is likely to occur toward the downstream side, and the waste paper pulp can be disintegrated more reliably and efficiently.

Therefore, it is possible to improve the disaggregation efficiency while eliminating the need for the power used only for swirling waste paper pulp in the container, which is a problem of the conventional waste paper processing apparatus. Then, the waste paper pulp liquid that has been disintegrated and has reached the downstream side of the pulp body 501 is diluted by supplying dilution water through the conduit 523c by the dilution water supply means 9, and then the diluted waste paper pulp liquid is It moves to the connecting pipe 507 through the discharge port 506. At this time, the waste paper pulp liquid is further diluted by the dilution supply means 9 via the pipe line 523d.

Here, since the waste paper pulp liquid in the pulper body 501 is filled with the waste paper pulp liquid having a relatively high concentration, the pressure of the waste paper pulp liquid sent to the screen 8 depends on the height of the connecting pipe 507 and the conduit 523c. , 523d pressure. Like this, Palpa 2
In, it is possible to continuously disintegrate a highly concentrated waste paper pulp liquid.

Thereafter, the waste paper pulp liquid is introduced into the screen body 601 through the connection pipe 507 and the charging port 607 of the screen 8. After the waste paper pulp liquid is introduced into the screen body 601, the heavy foreign matter mixed in the waste paper pulp liquid is intermittently discharged from the discharge port 615 provided in the same tangential direction as the input port 607 of the screen 8. It

The waste paper pulp liquid from which the heavy foreign matter has been removed moves axially downstream in the annular chamber (space) 621 between the screen rotor 602 and the screen basket 604 while it moves toward the screen basket. 60
Only the waste paper pulp that has been sorted out by a large number of four hole portions 604a and disaggregated smaller than the diameter of the hole portions 604a is discharged through the discharge port 606.
Is discharged to the outside of the screen body 601.

Since the screen basket 604 has a cylindrical shape, it has a large area, so that the passage capacity can be increased even if the porosity is made small, and the pump conventionally required for enhancing the passage capacity is not required. It is difficult for foreign matter to pass through the hole 604a of the screen basket 604, and even if foreign matter is caught in the hole 604a, it is pulled back by the negative pressure generated by the rotation of the tapering portion 620a of the screen rotor 602, and the eye of the hole 604a It is possible to prevent clogging. That is, the efficiency of removing foreign matter can be improved.

In this way, the auxiliary pulper, pump, etc., which are conventionally required, are not required, and the equipment cost and power can be saved. Further, since foreign matter such as laminate does not grow like a string in the subsequent process, it does not get entangled with the impeller (not shown) of the pump 60 or the agitator (not shown) of the stirring tank 70.

Further, the screen rotor 602 has an inclined portion 6
Since 53 is formed, the rotation resistance is small, the screen rotor 602 can be rotated at high speed and with low power, and the passing ability of the screen basket 604 can be increased. On the other hand, the lightweight foreign matter such as polyethylene laminate that could not pass through the hole 604a of the screen basket 604 is supplied to the conduit 523e by the dilution water supply means 9.
A screen rotor that rotates when it is treated with dilution water introduced from the nozzle 611 through the nozzle 611 at a lower concentration (0.5 to 2%), passes through the inlet 613 of the rotation chamber 657, and is agitated by the blade 612. Due to the centrifugal action of 602, the lightweight foreign matter is easily collected at the center of rotation, and the lightweight foreign matter is preferentially discharged (over the circular weir 614 shown in FIG. 1) to the outside of the screen body 601 through the discharge port 610. Therefore, the amount of waste paper pulp discharged to the discharge port 610 together with the lightweight foreign matter is reduced, and the yield can be improved.

As described above, since the continuous operation can be carried out at a high concentration, the time required for dilution and discharge is unnecessary, and the treatment efficiency per facility can be improved. Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention.

For example, in the present embodiment, the pulper rotor 5
02, a plurality of blade members 503 are provided on the outer periphery from the upstream side to the downstream side, but as shown in FIG.
03 is a multi-screw blade member 503a, 503b
You can Further, in the example shown in FIG. 7, the vane members 503 on the midstream side and the downstream side are configured such that the vane members 503c are radially arranged at positions at regular intervals in the axial direction. In this case, the blade member 50
3a and 503b axially drive the waste paper pulp liquid,
The blade member 503c disintegrates the waste paper. Thereby, in the initial stage of disaggregation, the waste paper pulp liquid thrown into the pulper 2 can be surely flowed to the downstream side, and the disaggregation process can be advanced.

Further, the pitch of the blade member 503 and the baffle plate 520 in the axial direction and / or the circumferential direction may be gradually reduced as the disaggregation progresses (that is, toward the downstream side). By doing so, the disintegration treatment capacity can be increased as the waste paper pulp liquid goes downstream. Further, the upstream blade members are the multi-screw-shaped blade members 503a and 503b shown in FIG. 7, and the midstream and downstream blade members are the blade members 503 shown in FIG.
You may choose to. Furthermore, the pitch of the blade members may be reduced toward the downstream side, and the disaggregation may be finely performed toward the downstream side.

In this embodiment, the length of the baffle plate 520 is
Although it is increased from the upstream side to the downstream side of the pulper body 501, it may be limited to a predetermined length as shown in FIG. 7. In addition, the baffle 520 is attached to the pulper body 50.
The inner peripheral surface may be spirally projected from the upstream side to the downstream side.

As the method of supporting the shaft 505 of the pulper rotor 502, either of both-ends support (bearings at both ends) or cantilever support (two sets of bearings on one side) may be used. The screen 8 shown in FIG. 1 may be mounted on the connecting pipe 507 by reversing the right and left. In this case,
As shown in FIG. 7, reference numeral 709 is an outlet for heavy foreign matter, and reference numeral 710b is an outlet for lightweight foreign matter. Further, at this time, a new discharge port for removing the lightweight foreign matter indicated by reference numeral 710a may be provided.

In this embodiment, the screen basket 6
04 has a large number of holes 604a, but it does not have to be holes, and for example, a slit having a width of 0.15 to 0.5 (more preferably about 0.3) mm is formed in the axial direction. You may do it. Further, the screen 8 may be replaced by a known vibrating screen or a drum type screen.

The rotation speed of the shaft 505 of the pulper rotor 502 and the shaft 605 of the screen rotor 602 may be controlled by a known inverter motor. In the present embodiment, the horizontal pulper 2 and the screen 8 are used, but a vertical pulper and screen 8 may be used.

[0059]

As described above in detail, according to the waste paper processing apparatus of the present invention as set forth in claim 1, the pulper is directly connected to the screen through the connecting pipe, and the pulper internally has the waste paper pulp. A pulper body for processing while moving the liquid, a pulper rotor provided inside the pulper body, a plurality of blade members projecting on the outer periphery of the pulper rotor for stirring the waste paper pulp liquid, and blades projecting on the inner periphery of the pulper body toward the pulper rotor. Since the disintegration promoting member that promotes disaggregation of the waste paper by the member is provided, it is possible to continuously disintegrate the waste paper between the plurality of blade members and the disaggregation promoting member while moving the waste paper. Therefore, the disintegration treatment of waste paper can be performed more effectively, and the disintegration treatment of waste paper pulp can be performed at a high concentration.

Further, since the continuous operation can be performed at a high concentration, the time required for diluting and discharging the waste paper pulp liquid can be omitted, and the treatment efficiency per facility can be improved. Further, since the waste paper can be reliably disintegrated by the pulper, the auxiliary pulper is not required, and the foreign matter mixed in the waste paper can be directly separated by the screen after the disintegration treatment in the pulper.

According to the waste paper processing apparatus of the second aspect of the present invention, the blade member is provided in the radial direction with respect to the axial direction of the pulper rotor, and as the disaggregation promoting member, maintains a predetermined gap with respect to the blade member. Since the plate-shaped first disaggregation promoting member provided therein is provided, the blade member and the first disaggregation promoting member do not interfere with each other, and the blade member does not interfere with the first disaggregation promoting member. The effect of mutual friction of waste paper pulp can be improved. That is, the waste paper can be disaggregated more reliably.

According to the waste paper processing apparatus of the present invention as defined in claim 3, among the plurality of blade members, at least the blade member arranged on the upstream side of the pulper into which the waste paper is fed is arranged in a spiral shape. Therefore, by rotating the pulper rotor, the waste paper pulp liquid fed from the upstream side of the pulper gradually moves to the downstream side and can be reliably disintegrated by the blade member and the first disaggregation promoting member. it can.

According to the waste paper treatment device of the present invention, the second disaggregation promoting member extending in the moving direction of the waste paper pulper liquid is provided on the inner peripheral surface of the pulper body as the disaggregation promoting member. Therefore, the interaction between the rotating blade member and the second disaggregation promoting member can disaggregate the waste paper more reliably. According to the waste paper processing apparatus of the present invention as set forth in claim 5, the screen has a hollow screen body, a gradually decreasing portion having an outer diameter continuously reduced, and a starting end portion of the gradually decreasing portion. Since the screen rotor is provided with an outer peripheral surface having a connecting portion for connecting the end portion, and the screen basket having a perforation is provided on the outer periphery of the screen rotor in the screen body, the screen basket and the screen are provided at the end portion. The gap between the rotor and the rotor is wide, and it is difficult for foreign matter to be shredded between the rotor and the screen basket even when processing waste paper including laminated paper. Therefore, only the disintegrated waste paper pulp can be discharged, and the foreign matter removal efficiency can be improved.

According to the waste paper processing apparatus of the present invention as defined in claim 6, the connecting portion is formed so as to be substantially orthogonal to the inclined portion formed on the terminal end side and having an increased outer diameter, and the outer peripheral surface formed on the starting end portion side. Since the screen rotor has a standing portion, the resistance is mitigated by the inclined portion even when the screen rotor rotates at a high speed, and the standing portion can maintain the disintegration treatment capacity of the waste paper pulp.

According to the waste paper processing apparatus of the present invention, the discharge port for heavy foreign matter provided on the outer periphery of the screen rotor and below and the discharge port for heavy foreign matter on the outer periphery of the screen rotor are provided. Also has a waste paper pulp discharge port provided above and a lightweight foreign matter discharge port provided near the center of rotation of the screen rotor, so heavy foreign matter accumulated at the bottom of the screen body is discharged from the lower discharge port. Therefore, heavy foreign matter in the waste paper pulp liquid can be reliably separated. Also, since lightweight foreign matter is lighter than the waste paper pulp liquid,
Since the light foreign matter gathers at the rotation center of the screen rotor and is discharged from the discharge port in the vicinity thereof, the light foreign matter in the waste paper pulp liquid can be reliably separated.

According to an eighth aspect of the present invention, there is provided a rotating chamber for rotating the remaining waste paper pulp liquid from which the heavy foreign matter has been removed, which is provided near the light foreign matter discharge port. Since it has an inlet for introducing the waste paper pulp liquid into the room and a blade part provided in the rotating chamber for rotating the introduced waste paper pulp liquid, the remaining waste paper pulp liquid from which heavy foreign matter has been removed is introduced from the inlet. After entering the rotating chamber and being agitated by the blades, lightweight foreign substances gather at the center of rotation of the rotating chamber,
Light weight foreign matter can be discharged from the discharge port provided near the center of rotation. As a result, the amount of waste paper pulp flowing out together with the lightweight foreign matter is reduced, so that the yield can be improved. Therefore, there is no need for another foreign matter separating device,
Equipment cost and power can be saved.

According to the waste paper treatment apparatus of the present invention as defined in claim 9, since the diluting water supply means for supplying the diluting water is provided in the rotating chamber, the waste paper pulp liquid from which heavy foreign matter has been removed is further reduced in concentration. It is possible to facilitate the collection of lightweight foreign matters mainly by the centrifugal action of the rotating screen rotor. Thereby, the lightweight foreign matter and the waste paper pulp liquid can be separated with higher accuracy.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a pulper and a screen of a waste paper processing apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram showing each processing step (processing equipment) of the waste paper processing apparatus according to the embodiment of the present invention.

FIG. 3 is a sectional view taken along the line AA in FIG. 1 of the waste paper processing apparatus according to the embodiment of the present invention.

FIG. 4 is a schematic perspective view showing a screen rotor of the waste paper processing apparatus according to the embodiment of the present invention.

FIG. 5 is an enlarged arrow view showing a starting end portion and an end portion of the screen rotor of the waste paper processing device according to the embodiment of the present invention.

FIG. 6 is a cross-sectional view taken along the line BB in FIG. 1 of the waste paper processing apparatus according to the embodiment of the present invention.

FIG. 7 is a schematic cross-sectional view showing a pulper and a screen of a modified example according to the embodiment of the present invention.

FIG. 8 is a block diagram showing each processing step (processing equipment) in a conventional waste paper processing apparatus.

FIG. 9 is a schematic cross-sectional view showing a pulper and an auxiliary pulper in a conventional waste paper processing apparatus.

FIG. 10 is a schematic top view showing a rotor and a disassembling plate of a pulper in a conventional waste paper processing apparatus.

[Explanation of symbols]

2 pulper 8 screen 9 dilution water supply means 10 conveyor 20 pulper 30 auxiliary pulper 40 pump 50 stirring tank 60 pump 70 cleaner 80 screen 201 container 202 rotor 203 rotor 203a blade 204 disaggregation plate 204a hole 205 shaft 206 disintegrated waste pulp pulp liquid Discharge port 207 Waste paper pulp liquid discharge port 208 Seal 209 Motor 301 Container 303 Rotor 303a Blade 304 Disaggregation plate 304a Hole 305 Shaft 306 Disaggregated waste paper pulp liquid discharge port 307 Input port 308 Seal 309 Motor 310 Light weight foreign matter discharge Outlet 311 Heavy foreign matter discharge port 501 Palpa body 502 Palpa rotor 503 Blade members 503a and 503b Screw-shaped blade member 503c Blade member 505 Shaft 506 Waste paper pulp liquid discharge port 508 Seal 509 model 511 input port 520 baffle plate (first disaggregation promoting member) 521 baffle plate (second disaggregation promoting member) 523a, 523b, 523c, 523d, 523e,
523f Pipeline 601 Screen body 602 Screen rotor 604 Screen basket 604a Hole 605 Shaft 606 Discharged waste pulp pulp discharge port 607 Input port 608 Seal 609 Motor 610 Light foreign matter discharge port 611 Nozzle 612 Wing 613 Notch (introduction Mouth) 614 Circular weir 615 Heavy foreign matter discharge port 617 Scraping blade 620a Gradual reduction part 620b Connection part 621 Annular chamber 650 Spare blade 651 Starting end part 652 Standing part 653 Sloping part 655 Bolt 656 End part 709 Heavy foreign matter discharge port 710b Light weight foreign substance Outlet of

Claims (9)

[Claims] 1. A waste paper treatment apparatus comprising a pulper for containing waste paper and water, and a screen for removing foreign matters contained in the waste paper pulp liquid formed in the pulper, wherein the pulper is a connecting pipe. And a pulper body for treating the waste paper while moving the waste paper pulp liquid therein, a pulper rotor provided inside the pulper body, and a waste paper projectingly provided on the outer periphery of the pulper rotor. A plurality of blade members for stirring pulp liquid, and a disaggregation promoting member that is provided on the inner periphery of the pulper body so as to project toward the pulper rotor and that promotes disaggregation of the waste paper by the blade members. Waste paper processing equipment. 2. The blade member is provided in a radial direction with respect to the axial direction of the pulper rotor, and as the disaggregation promoting member,
2. The waste paper processing apparatus according to claim 1, further comprising a plate-shaped first disaggregation promoting member provided with a predetermined gap with respect to the blade member. 3. A blade member arranged on the upstream side of the pulper into which the waste paper pulp liquid is introduced among the plurality of blade members is arranged in a spiral shape. The waste paper processing apparatus according to claim 1. 4. The disaggregation promoting member is provided with a second disaggregation promoting member extending in the moving direction of the waste paper pulper liquid on the inner peripheral surface of the pulper body. 3. The waste paper processing apparatus according to any one of 3 above. 5. The screen has a hollow screen body, a gradual decrease portion provided in the screen body, the outer diameter of which gradually decreases, and a connection for connecting a start end portion and a distal end portion of the gradual decrease portion. 5. A screen rotor having an outer peripheral surface having a portion, and a screen basket having a perforation provided on the outer periphery of the screen rotor in the screen body. The waste paper processing apparatus according to item 1. 6. The connecting portion includes an inclined portion formed on the end portion side and having an increased outer diameter, and an upright portion formed on the start end portion side and standing upright so as to be substantially orthogonal to the outer peripheral surface. The waste paper processing apparatus according to claim 5, wherein 7. A discharge port for heavy foreign matter provided on the outer circumference of the screen rotor and below, and a waste paper pulp liquid provided on the outer circumference of the screen rotor and above the discharge port for heavy foreign matter. 7. The waste paper processing apparatus according to claim 5, further comprising an outlet and a light foreign matter discharge outlet provided near the center of rotation of the screen rotor. 8. A rotating chamber provided near the light foreign matter discharge port for rotating the remaining waste paper pulp liquid from which the heavy foreign matter has been removed, and an introduction for introducing the waste paper pulp liquid into the rotation chamber. 8. The waste paper treatment device according to claim 7, further comprising a mouth and a blade portion provided in the rotation chamber for rotating the introduced waste paper pulp liquid. 9. The waste paper processing apparatus according to claim 8, further comprising a diluting water supply means for supplying diluting water into the rotary chamber.