JP2006002292A - Vertical continuous pulper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vertical continuous pulper capable of properly carrying out the concentration control of ejected slurry. <P>SOLUTION: The vertical continuous pulper 1 makes a paper stock slurry having a prescribed concentration from a paper stock fed from a supply port 12 installed in the upper part of a vertical cylindrical container 10 by rotating a vertical rotary shaft 14 having multistep stirring blades 18 arranged in the upper and lower direction in the vertical cylindrical container to mix and stir the paper stock 9 and a solution and to disaggregate the paper stock, and continuously ejects the paper stock slurry from a taking out port 13 at the lower part. The pulper 1 has an axially supported lid member 32 for plugging the taking out port 13, and a driving means 35 for carrying out the opening and closing of the taking out port 13 by the lid member 32. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  In the present invention, waste materials such as waste paper and waste paper are disaggregated to continuously discharge a stock slurry of a predetermined concentration, and the discharge amount of the stock diluted by adding white water (diluted water) to the stock slurry is reduced. The present invention relates to a vertical continuous pulper to be controlled.

In recent years, demands for resource conservation and global environmental conservation have increased, and the recycling rate of waste paper and waste paper has increased. Magazines that have been difficult to deink and remove foreign matter, laminated paper containers, etc. Are also being used as paper stock.
A pulper that creates a paper slurry to perform a resource cycle for paper such as waste paper and waste paper has so far been charged with a solution and water mixed with water and chemicals in a container, and mixed and stirred for a certain period. After the completion of the process, a so-called batch type in which the discharge port is opened and the entire amount of the paper slurry is taken out has been put into practical use. However, since the batch-type pulper has a long loss time and poor operability, a continuous-type pulper capable of continuously taking out the paper slurry has recently been required and various proposals have been made.

According to the application disclosed in Japanese Patent Application Laid-Open No. 2003-193383, the applicant can continuously obtain a uniform paper slurry with low energy consumption, and is less likely to cause finer foreign matters. A formula pulper is proposed. In the vertical continuous pulper, the stock supplied from the upper part in the vertical cylindrical container is stirred in the solution by the stirring blades attached to the vertical rotation shaft in multiple stages, and is disaggregated as it moves downwards. It is discharged from an outlet provided at the bottom of the cylindrical container. Since the time required for disaggregation differs depending on the type of paper stock to be supplied, it is necessary to appropriately adjust the discharge amount of the paper stock slurry. In this case, the rotational speed of the screw feeder is appropriately adjusted.
JP 2003-193383 A (page 2-3, FIG. 1)

  In such a conventional continuous pulper, for example, the concentration of the discharged paper slurry is set to 18 to 20 percent, and after that, the concentration is further reduced to 1 to 4 percent, and then foreign matters are removed through the screen. At that time, in the vertical continuous pulper, as described above, the discharge amount of the paper material slurry is adjusted by the screw feeder provided at the discharge port. However, when the slurry concentration is 18 to 20 percent, the fluidity is fluidized to some extent, so the discharge amount can be adjusted with a screw feeder. However, since the waste paper is not sufficiently dissolved and disaggregated immediately after the start, Only the solution in the mold cylinder leaks out. If the ratio between the solution in the vertical cylindrical container and the crushed stock is different, it becomes difficult to manage the processing amount of the crushed stock that has been input, and a slurry with the required concentration cannot be obtained. End up. Moreover, since the discharged slurry is diluted with white water to 2 to 3 percent, stirred and transferred to a screen (dust removal process), concentration management is important.

  Accordingly, an object of the present invention is to provide a vertical continuous pulper that can appropriately control the concentration of a slurry to be discharged in order to solve such a problem.

The vertical continuous pulper of the present invention is supplied with paper from a supply port provided in the upper part of the vertical cylindrical container, and a vertical rotation shaft provided with multistage stirring blades in the vertical direction rotates in the vertical cylindrical container. Thus, a paper slurry having a predetermined concentration is prepared by mixing and stirring the paper material with the solution to disaggregate, and the paper material slurry is continuously discharged from the lower outlet, and the outlet is blocked. It has a lid member that is pivotally supported, and a drive means that opens and closes the outlet by the lid member.
In the vertical continuous pulper of the present invention, the driving means is a cylinder, the cylinder tube is pivotally supported so that the piston rod is pin-coupled to the lid member. Features.

In the vertical continuous pulper of the present invention, the crushed paper stock is continuously charged into the vertical cylindrical container containing the solution, and the crushed paper stock is stirred by the stirring blades and descends while disaggregating in the solution. Then, the concentration in the water is reduced to a predetermined value, and is continuously discharged from the take-out port as a uniform paper slurry. In the present invention, the lid member is closed by a driving means such as a cylinder so that only moisture does not flow out of the outlet at the start of work when the crushed paper is not sufficiently dissolved. Wait for it to be made. Then, the lid member is opened at the stage where the paper slurry of a predetermined concentration is made, and the paper slurry of the predetermined concentration is continuously discharged from the outlet as described above.
Therefore, according to the vertical continuous pulper of the present invention, the lid member is provided at the outlet so that it can be closed, so that the concentration control of the discharged slurry can be performed appropriately. .

  Next, an embodiment of a vertical continuous pulper according to the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a portion centering on a vertical continuous pulper in a paper recycling system. A crusher 2 is provided on the upstream side of the vertical continuous pulper 1, and crushed paper stock obtained by crushing the bale 8 packed in a compressed package is supplied to the vertical continuous pulper 1. First and second conveyors 3 and 4 are disposed in the crusher 2, and a third conveyor 5 is disposed between the crusher 2 and the vertical continuous pulper 1. In the first and second conveyors 3 and 4, the bale 8 is conveyed to the crusher 2, and in the third conveyor 5, the crushed paper stock 9 crushed and discharged by the crusher 2 is mounted, and the vertical continuous pulper 1 is conveyed. In the vertical continuous pulper 1, the crushed paper stock and the solution are put into a paper stock slurry, which is discharged from below.

  FIG. 2 is a diagram showing the overall configuration of the vertical continuous pulper. As shown in the drawing, the vertical continuous pulper 1 has a vertical cylindrical container 10 erected on a gantry 11. The vertical cylindrical container 10 has a supply port 12 into which the crushed paper stock 9 is charged at the upper end, and an outlet 13 through which the paper slurry is taken out at the lower side. In the vertical cylindrical container 10, a vertical rotation shaft 14 is rotatably supported at the central portion in the vertical direction. It is comprised so that it may transmit via.

The vertical rotating shaft 14 erected in the vertical cylindrical container 10 has a spiral pulping rotor-1
7 is attached to the uppermost part, and a plurality of rotors 18 are attached in the upper and lower stages under the upper part. The notch part is formed in the pulping rotor 17 so that the crushed paper stock 9 put from the supply port 12 falls from the notch part below the pulping rotor 17. On the other hand, the rotor 18 provided in upper and lower stages is formed so that the number of blades is gradually increased such that the upper part has two, the middle part has three, and the lower part has four. ing. This is because the stirring force is increased stepwise by increasing the number of blades from top to bottom.

In addition, a plurality of vertical ribs 21 project in the vertical direction on the inner wall of the vertical cylindrical container 10 so as to promote stirring of the crushed paper stock 9 flowing through the interior of the vertical cylindrical container 10. A horizontal rib 22 is projected at an intermediate height of 18.
On the other hand, a screw feeder 19 is provided at the bottom of the vertical cylindrical container 10 for taking out the paper slurry to the outlet 13. The screw feeder 19 can adjust the discharge amount of the paper slurry by controlling the rotation speed of the motor 20. A separator 23 is provided at the tip of the screw feeder 19 to remove foreign substances from the paper slurry discharged from the vertical cylindrical container 10.

The vertical cylindrical container 10 is supplied with chemicals (eg, NaOH, deinking agent, Na ₂ SiO ₃ , H ₂ O ₂ , steam) for deaggregating the stock, and the piping for that purpose is a vertical cylinder. Connected to the container 10. Water is flowed through one line 25 formed by connecting a pipe to the vertical cylindrical container 10, and steam is flowed through the other line 26. Of these lines, the line 25 is branched and divided into two directions. Electromagnetic switching valves 27 and 28 are connected to the respective branch lines, and the electromagnetic switching valve 29 is connected to the other line 26. For example, NaOH, a deinking agent, and Na ₂ SiO ₃ are sent to the secondary side of the electromagnetic on-off valve 27, and H ₂ O ₂ is sent to the secondary side of the electromagnetic on-off valve 28.

Here, FIG. 3 is a view showing a lower structure of the vertical continuous pulper 1.
An extraction pipe 31 is provided at the bottom of the vertical cylindrical container 10, and a screw feeder 19 that is rotated by driving of the motor 21 is placed therein. The paper slurry produced in the vertical cylindrical container 10 flows through the take-out pipe 31 and is pushed away from the take-out port 13. In the present embodiment, a flapper 32 that regulates the flow of the paper slurry is attached to the outlet 13. The front end of the outlet 13 is formed obliquely, and a flapper 32 that is pressed against the outlet 13 to close the opening is pivotally supported on the upper portion so as to rotate in the front-rear direction. A fitting 33 is projected from the flapper 32, and a cylinder 35 for controlling opening and closing is provided there. The cylinder 35 is pivotally supported so that the cylinder tube can swing with respect to the support frame 36, and the tip of the piston rod 35 a is pin-coupled to the mounting bracket 33 of the flapper 32.

  As shown in FIG. 2, a dilution stirring tank 40 is provided downstream of the vertical cylindrical container outlet 13, and a separator 23 is further provided downstream thereof, which is connected to the Jansson receiving pit 41. In the dilution stirring tank 40, the paper slurry having a concentration of 18 to 20 percent in the vertical cylindrical container 10 is further diluted and stirred to 2-3 percent. Therefore, white water is added to the paper slurry from the outlet 13 in the dilution stirring tank 40 and is stirred by the stirrer 42. The separator 23 is provided with a Jansson screen, and dust is removed from the paper slurry diluted to 2 to 3 percent.

Next, the operation of the vertical continuous pulper 1 configured as described above will be described.
In the vertical continuous pulper 1 of the present embodiment, the solution is filled by injecting water or chemicals by driving the electromagnetic on-off valves 27, 28, and 29, and the crushed paper stock 9 is input thereto from the supply port 12. . The crushed paper stock 9 introduced from the supply port 12 is dissolved in the solution in the vertical cylindrical container 10 and guided downward by the pulping rotor 17. At this stage, some of the crushed paper stock 9 still exists as a lump, but the notch is formed in the pulping rotor 17 so that it is less than 1 pitch, so the lump is removed from the notch. It falls down.

On the other hand, since the stock slurry is discharged from the outlet 13 by the screw feeder 19 at the bottom of the vertical cylindrical container 10 as described above, the crushed paper stock 9 supplied from above is sequentially placed in the vertical cylindrical container 10. Will sink toward the bottom. Then, disintegration of the crushed paper stock 9 is gradually advanced by the lower rotor 18 whose number of blades increases as it descends.
Since the rotor 18 has a low rotational speed and becomes planar agitation, the rotor 18 rides on the flow in the rotational direction as the stock in the solution is stirred. However, since the flow of the paper is prevented by the vertical ribs 21 and the horizontal ribs 22 attached to the inner side wall of the vertical cylindrical container 10, the rotation with the rotor 18 is prevented.

Since the rotor 18 has a small number of blades in the upper stage, the downward movement is smooth even in an unseparated state, while the lower rotor 18 has a larger number of blades, which increases the stirring force. A homogeneous paper slurry will be produced. Moreover, since the stirring force is large in the lower stage, the ability to separate the ink particles adhering to the disaggregation fiber is also increased.
The stock supplied from the supply port 12 descends in the vertical cylindrical container 10 while being disaggregated in the solution by such agitation, and becomes a homogeneous stock slurry having a concentration in water of about 18 to 20 percent. And discharged from the outlet 13.

  The paper slurry made in the vertical cylindrical container 10 flows into the take-out pipe 31 and is sent out from the take-out port 13 to the dilution stirring tank 40 by the rotation of the screw feeder 19 there. At this time, when it is necessary to control the time in which the paper stays in the vertical cylindrical container 10, the amount of the paper slurry discharged per unit time is reduced by reducing the rotation speed of the screw feeder 19. be able to. Then, white water is injected into the dilution stirring tank 40 from which the paper slurry is discharged, and the diluted paper slurry is stirred by the stirrer 42 to reduce the concentration to 2 to 3 percent. Thereafter, the paper slurry is dedusted by the Jansson screen of the separator 23, foreign matter is removed, and it is temporarily stored in the Jansson receiving pit 41. Then, it is transported to the subsequent processing step.

  In the vertical continuous pulper 1, as described above, the paper slurry produced in the vertical cylindrical container 10 is discharged from the take-out port 13 to the dilution stirring tank 40 at a concentration of 18 to 20 percent, where there is 2-3 percent. Diluted to a concentration of In the vertical continuous pulper 1, it is important to control the concentration of the paper slurry. Therefore, the residence time of the paper in the vertical cylindrical container 10 is adjusted by the rotation of the screw feeder 19. However, immediately after the start, the vertical cylindrical container 10 is filled with the solution, and when the crushed paper stock 9 is charged therein, no paper slurry is formed. Therefore, sufficient time for stirring by the rotor 18 is obtained. It is necessary to take

  Therefore, in this embodiment, the flapper 32 is closed so that the solution in the vertical cylindrical container 10 does not flow out from the outlet 13. In the flapper 32, the piston rod 35a protrudes by the extension operation of the cylinder 35, and is pressed against the outlet 13 to close the opening. As a result, it is possible to prevent only the solution from leaking out while the used paper is not sufficiently dissolved in the dilution stirring tank 40, and the crushed paper stock 9 in a state where the vertical cylindrical container 10 is filled with a sufficient solution. It can be disaggregated in solution by stirring and dissolved and disaggregated. Then, the flapper 32 is closed and waits for a predetermined time, and the outlet 13 is opened when the slurry concentration becomes 18 to 20%. For this purpose, the cylinder is contracted and the flapper 32 is pulled through the piston rod 35a to be separated from the opening. The opening degree of the flapper 32 is constant, and the subsequent management of the slurry concentration is adjusted by the rotational feed of the screw feeder 19 as described above.

Therefore, according to the vertical continuous pulper 1 of the present embodiment, the flapper 32 is provided at the outlet 13 so as to cover it, so that the paper slurry discharged from the vertical cylindrical container 10 at the start of work can be reduced. The concentration control of 18 to 20 percent can be easily performed.
And the processing amount of the paper slurry sent to the dilution stirring tank 40 from the vertical cylindrical container 10 at the time of a work start can be adjusted.

  The vertical continuous pulper of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit thereof.

It is the figure which showed the part centering on the vertical type continuous pulper in a paper material reproduction | regeneration system. It is the figure which showed the vertical type | mold continuous-type pulper of one Embodiment. It is the figure which showed the lower part structure of the vertical type | formula continuous pulper of one Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vertical type continuous pulper 2 Crusher 3 1st conveyor 4 2nd conveyor 5 3rd conveyor 8 Bale 9 Crushed paper stock 10 Vertical cylindrical container 13 Outlet 14 Vertical rotating shaft 18 Rotor 19 Screw feeder 20 Motor 23 Separator 32 Flapper 35 Cylinder 40 Dilution stirring tank 41 Jansson receiving pit 42 Stirrer

Claims (2)

The stock is supplied from the supply port provided in the upper part of the vertical cylindrical container, and the vertical rotation shaft with multistage stirring blades on the top and bottom rotates in the vertical cylindrical container. In a vertical continuous pulper that makes a paper slurry of a predetermined concentration by disaggregating and discharging the paper slurry continuously from the lower outlet,
A vertical continuous pulper comprising: a pivotally supported lid member for closing the take-out port; and a drive means for opening and closing the take-out port by the lid member. In the vertical continuous pulper according to claim 1,
A vertical continuous pulper characterized in that the driving means is a cylinder, a cylinder tube of which is pivotally supported, and a piston rod is pin-coupled to the lid member.

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