JP4346488B2 - Paper supply equipment - Google Patents

Description

The present invention is to feed a paper material into a continuous pulper that disaggregates the paper material such as waste paper and waste paper and continuously discharges a stock slurry of a predetermined concentration. The present invention relates to a paper supply device that supplies an appropriate amount of paper at a predetermined timing.

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 stock slurry to perform a resource cycle for such materials as waste paper and waste paper has so far been charged with a mixture of water and chemicals and stock in a container, and mixed and stirred for a certain period of time. After the disaggregation is completed, 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, the demand for a continuous-type pulper that can continuously take out a paper slurry has been increased 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 a compact continuous type in which miniaturization of foreign matters hardly occurs. Pulper is proposed. In the continuous pulper, the stock supplied from above into 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 downward sequentially. And it discharges from the outlet provided in the lower part of a vertical cylindrical container.
Supply of the stock to such a continuous pulper is performed, for example, every time a stock slurry in a vertical cylindrical container is discharged, and the time required for disaggregation differs depending on the type of stock to be supplied. When it is necessary to adjust the discharge amount of the material slurry, 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. Then, after further diluting to 1 to 4 percent, foreign matters are removed through the screen. In order to keep the stock slurry concentration within a certain range (for example, 18 to 20 percent) with this continuous pulper, it is necessary to adjust the ratio of the solution and the crushed stock in the vertical cylindrical container. At that time, since the crushed paper stock is supplied in a lump, it is preferable to temporarily stop the supply of the crushed paper stock to the continuous pulper and restart the supply after disaggregation progresses.
However, if the crusher that crushes the bale that has been compressed and packed is stopped while the bale remains in the rotating blade, a very large amount of power is required when the operation is resumed. Therefore, when the operation is resumed, the power consumption increases, and in the worst case, the biting is strong and the rotary blade may not rotate. Therefore, conventionally, the crusher has to be operated continuously. However, it is difficult to supply an appropriate amount of the crushed paper stock into the vertical cylindrical container in a timely manner.

Accordingly, an object of the present invention is to provide a paper supply device that supplies an appropriate amount of crushed paper material into a continuous pulper in a timely manner in order to solve such problems.

A stock supply apparatus according to the present invention is for supplying a crushed stock to a continuous pulper that continuously discharges a stock slurry produced in a vertical cylindrical container, and is a box-shaped container A crusher that crushes a bale of lump of stock placed inside with a pair of rotary blades provided at the bottom and discharges it downward, and the crushed stock released from under the crusher are continuously Conveyor transported to the supply port of the type pulper, a control device for controlling the driving of the crusher , and a liquid level for measuring the liquid level height in the vertical cylindrical container and transmitting the measurement signal to the control device The crusher is provided with a push-up member that lifts the bale therein, and the control device controls the operation of the push-up member in accordance with the liquid level in the vertical cylindrical container. It is a thing to do.

In the paper supply device according to the present invention, the push-up member is a push-up plate pivotally supported in a box-shaped container of a crusher, and the control means swings the push-up plate. The drive means is driven and controlled in accordance with the liquid level in the vertical cylindrical container.
In the paper supply device according to the present invention, the driving means for swinging the push-up plate is a cylinder on which a cylinder body is pivotally supported, and the tip of the rod is pivotally supported on the push-up plate. It is characterized by that.
Furthermore, in the paper supply device according to the present invention, the control device detects the liquid level of the upper limit value and the lower limit value, and when the upper limit value is detected, the bail in the crusher is lifted by the lifting member, When the lower limit value is detected, the push-up member is retracted.

Therefore, in the stock supply apparatus according to the present invention, the liquid level in the vertical cylindrical container in which the stock slurry is made is detected by the liquid level sensor, and the push-up member is pushed according to the liquid level. The raising operation and the save operation are controlled. The bale put in the crusher is crushed by its own weight and is crushed by the rotary blade at the bottom, but when it is lifted by the lifting member, the entry to the rotary blade is hindered and released from the crusher. When the amount of the crushed paper stock is reduced and the push-up member is in the retracted state, the amount of the crushed paper stock is increased because the bale is bitten by the rotary blade without being disturbed.
For example, in the control device, an upper limit value and a lower limit value are set for the liquid level height in the vertical cylindrical container, and when it is detected that the liquid level is the upper limit value, a push-up member provided as a push-up member The bale is lifted by swinging the plate by expansion and contraction of the cylinder. As a result, the amount of crushed stock supplied to the continuous pulper is reduced. On the other hand, when it is detected that the liquid level is the lower limit value, the push-up plate is swung to the retracted state, and the amount of the crushed paper stock supplied to the continuous pulper increases.

Therefore, according to the paper supply device according to the present invention, a push-up member that lifts the bale is provided inside the crusher, and the control device transmits the liquid level height in the vertical cylindrical container transmitted from the liquid level sensor. since so as to operate the push-up member in response to the measurement signal, it is possible to adjust the stock supply to a continuous pulper, for supplying a proper amount of crushed already stock in a continuous pulper in time stock It became possible to provide a supply device .

Next, an embodiment of the paper supply device according to the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an overall configuration of a continuous pulper. As shown in FIG. 1, the 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 material 51 is charged at the upper end, and an outlet 13 through which the paper material slurry is taken out at the lower side. In the vertical cylindrical container 10, a vertical rotation shaft 14 is rotatably supported at the center in the vertical direction, and a driving force of a motor 15 provided at the lower portion of the gantry 11 is supported on the vertical rotation shaft 14 by a speed reducer 16. 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 17 attached to the uppermost portion, and a plurality of rotors 18 are attached to the upper and lower multistages below. A notch is formed in the pulping rotor 17, and the crushed paper stock 51 put from the supply port 12 falls under the pulping rotor 17 from the notch. On the other hand, the rotor 18 provided in the 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 to increase the 撹拌力by increasing the number of blades from top to bottom stages.

Further, on the inner wall of a vertical cylindrical container 10, as 撹拌crushed already stock 51 flowing through is accelerated, with a plurality of vertical ribs 21 in the vertical direction is protruded, in each stage rotor Horizontal ribs 22 project from the intermediate height 18.
On the other hand, a screw feeder 19 for taking out the paper slurry from the outlet 13 is provided at the bottom of the vertical cylindrical container 10. 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.

  FIG. 2 is a conceptual diagram showing a paper supply device for supplying the crushed paper material 51 to the continuous pulper 1. That is, a conveyor 40 is disposed between the vertical cylindrical container 10 of the continuous pulper 1 and the crusher 30, and the crushed paper stock 51 discharged from the crusher 30 and mounted on the conveyor 40 is a vertical cylinder. It is sent to the supply port 12 of the container 10. Here, FIG. 3 is a diagram showing the crusher 30 constituting the paper supply device.

The crusher 30 has a pair of rotating shafts 32 and 32 arranged in a direction penetrating the drawing at the bottom of a box-shaped container 31 having a size capable of containing several bale 50. The plurality of rotary blades 33 and 33 are alternately overlapped with each other. The rotation shafts 32 and 32 are connected to a rotation transmission mechanism that transmits rotation from a drive motor (not shown), and the opposed rotary blades 33 and 33 are configured to rotate inward from each other.
The box-shaped container 31 is greatly opened upward, and left and right side surfaces 31a and 31b along the axis of the rotation shafts 32 and 32 are inclined toward the bottom where the rotary blades 33 and 33 are located. A plurality of bales 50 are put into the box-shaped container 31 as shown in FIG. 2. When the operation is stopped in the middle of crushing when the bail 50 is bitten by the rotary blades 33, 33, A very large starting force is required to resume operation. Therefore, the crusher 30 is continuously operated while the continuous pulper 1 is in operation.

However, on the other hand, if a constant amount of the crushed paper stock 51 is always supplied into the vertical cylindrical container 10, the crushed paper stock 51 becomes too much with respect to the amount of the solution, and the target concentration. It becomes impossible to discharge the paper slurry. Therefore, in the present embodiment, a push-up plate 35 that prevents the bale 50 from entering between the rotary blades 33 and 33 is provided.
As shown in FIG. 3, a push-up plate 35 is pivotally supported in the box-shaped container 31 of the crusher 30 so that the upper end of the inclined side surface 31a is swingable. A push-up cylinder 36 for swinging the push-up plate 35 is connected. In the crusher 30, a support arm 37 extends from the box-shaped container 31, and a lifting cylinder 36 is pivotally supported on the support arm 37, and a rod tip is pivotally supported on the lifting plate 35.

  Further, the crusher 30 is provided with a pressing slider 38 on the side surface 31b opposite to the surface on which the push-up plate 35 is provided. This is to prevent the cubic veil 50 from entering between the rotary blades 33 and 33 so as to prevent the so-called floating state and to ensure the crushing (not shown in FIG. 2). Although not shown in detail, the pressing slider 38 is configured to slide a rail formed along the side surface 31b by a driving force such as a cylinder.

Next, as shown in FIG. 2, in the paper supply device of this embodiment, a liquid level sensor 45 such as an ultrasonic distance meter is installed above the supply port 12 of the vertical cylindrical container 10 , which is a control device. 46 is connected to a slider (not shown) that drives the push-up cylinder 36 and the press slider 38. For example, a hydraulic cylinder is used as the push-up cylinder 36, and the control device 46 is connected to a switching electromagnetic valve that switches the flow of hydraulic oil in the hydraulic cylinder. However, this hydraulic circuit is omitted in the drawing. The push-up cylinder 36 may be an electric cylinder.

  By the way, in the continuous pulper 1, when a sufficient solution and the crushed paper stock 51 are once supplied into the vertical cylindrical container 10, the supply amount is reduced so as not to increase the crushed paper stock 51 so much, It is necessary to wait for the crushed paper stock 51 to sink down and disaggregate. Since the liquid level in the vertical cylindrical container 10 drops after a predetermined time, the supply of the crushed paper stock 51 with the solution is increased until the liquid level rises to a certain height again. It is good to do. Therefore, a liquid level control program is set in the control device 46, and the lower limit value L1 and the upper limit value L2 of the liquid level shown in FIG. 2 are detected based on the measurement signal of the liquid level sensor 45 to supply the solution. The supply amount of the crushed paper stock 51 is adjusted.

That is, when the control device 46 detects the lower limit value L1 and the upper limit value L2 of the liquid level, a control signal is sent to the switching solenoid valve that operates the push-up cylinder 36 and the like, and the solenoid valves 27 and 28 are opened and closed. Thus, the solution is supplied or stopped, and the supply amount of the crushed paper stock 51 supplied to the continuous pulper 1 is adjusted by the expansion and contraction operation of the push-up cylinder 36 and the like.
Of the liquid levels L2, L1, and L3 set in the upper and lower stages, L1 indicating the lower limit is the height located above the pulping rotor 17 shown in FIG. 1, and is set below L1. The height of L3 is the position where the liquid level has dropped to just above the pulping rotor 17. Further, L2 indicating the upper limit is a position that is lowered by an arbitrary distance from the supply port 12.

Next, the operation of the continuous pulper 1 and the paper supply device having the above-described configuration will be described.
In the continuous pulper 1 of this embodiment, a stock slurry having a predetermined concentration is continuously discharged from an outlet 13 of a vertical cylindrical container 10 formed at the bottom. The discharge of the paper slurry reduces the solution in the vertical cylindrical container 10 and the crushed paper 51, so that the solution and the crushed paper 51 are appropriately supplied according to the discharge amount. It is operated so that the liquid level always fluctuates in a certain height range. That is, the paper slurry is made such that the liquid level in the vertical cylindrical container 10 moves up and down between L1 and L2 shown in FIG. 2 as described above.

  The crushed paper stock 51 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 51 still exists as a lump, but the notch is formed in the pulping rotor 17 so as to be less than one pitch. It falls to. On the other hand, since the paper 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 51 supplied from above is sequentially placed in the vertical cylindrical container 10. Will sink toward the bottom. Then, the disintegration of the crushed paper stock 51 is gradually advanced by the lower rotor 18 whose number of blades increases as it descends.

  Since the rotation speed of the rotor 18 is low and flat stirring is performed, the rotor 18 rides on the flow in the rotation direction as a result of the stock in the solution being 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 undissolved state. On the other hand, 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.

Stock inserted from the feed port 12, a vertical cylindrical vessel 10 descends while macerated in a solution by such 撹拌, concentration in the water is a homogeneous stock slurry of about 18 to 20 percent It is discharged from the outlet 13. In addition, when it is necessary to control the residence time in the vertical cylindrical container 10 depending on the kind of the stock, the amount of the stock slurry discharged per unit time is reduced by reducing the rotation speed of the screw feeder 19. Can be made. Then, the discharged paper slurry is further reduced in concentration by 1 to 4 percent, and foreign substances are removed by the separator 23 and conveyed to the subsequent processing step.

Next, in the paper supply apparatus of the present embodiment, the vertical cylindrical container is discharged from the crusher 30 and is conveyed by the conveyor 40 so that the concentration of the paper slurry discharged from the continuous pulper 1 is 18 to 20 percent. The supply amount of the crushed paper stock 51 conveyed to 10 and the timing thereof are adjusted.
First, in the paper supply device, the crushing state of the bale 50 in the box-shaped container 31 is adjusted by the inclination of the push-up plate 35 and the pressing state of the pressing slider 38.

During crushing, the push-up cylinder 36 is in a contracted state, and the push-up plate 35 is in a retracted state lowered along the side surface 31a. Then, the pressing slider 38 moves down along the side surface 31 b, and the bale 50 in the box-shaped container 31 is pressed against the rotary blades 33 and 33 . Therefore, a lot of crushed paper stock 51 is released from the crusher 30.
On the other hand, when the push-up cylinder 36 extends and the push-up plate 35 moves away from the side surface 31a, the bail in the box-shaped container 31 is lifted by the push-up plate 35. At this time, the pressing slider 38 rises to release the pressing of the bail 50 against the rotary blades 33 and 33. Therefore, it becomes difficult for the bale 50 to enter between the rotary blades 33 and 33, and the amount of the crushed paper stock 51 discharged from the crusher 30 is reduced.

  In the paper supply device of this embodiment, the supply amount to the vertical cylindrical container 10 is adjusted in this way, and the timing of the adjustment is switched according to the liquid level in the vertical cylindrical container 10. That is, the liquid level in the vertical cylindrical container 10 is measured by the liquid level sensor 45, and the measurement signal is sequentially sent to the control device 46. The control device 46 that has received the measurement signal detects a change in the liquid level in the vertical cylindrical container 10.

In continuous pulper 1, crushing already stock 51 by the rotation of the pulping rotor 17 and rotor 18 as described above is 撹拌, homogeneous stock slurry by macerating in solution is gradually built. Therefore, when the control device 46 detects that the liquid level has dropped to L <b> 1 by the measurement signal from the liquid level sensor 45, a solution in which a chemical is added to water is fed into the vertical cylindrical container 10.
Since the crushed paper stock 51 needs to be supplied as the solution increases, a drive signal is sent from the control device 46 to the push-up cylinder 36 side. Then, as described above, the push-up cylinder 36 contracts and the push-up plate 35 is lowered. Similarly, a drive signal is also sent from the control device 46 to the pressing slider 38 side, and the pressing slider 38 pressurizes the bail 50, so that a large amount of conveyed paper stock 51 is discharged onto the conveyor 40 and is a vertical cylindrical container. 10 is supplied.

  In the vertical cylindrical container 10, the liquid level rises due to the solution thus added and the crushed paper stock 51. When the controller 46 detects that the liquid level has risen to L2, the supply of the solution into the vertical cylindrical container 10 is stopped. The drive control is also transmitted to the push-up cylinder 36, and the push-up plate 35 is separated from the side surface 31a by the extension operation, and the bale 50 contained in the box-shaped container 31 is lifted. In the crusher 30, the pressing slider 38 is simultaneously driven and lifted to release the pressure on the bail 50. Therefore, the bale 50 is prevented from entering the rotary blades 33 and 33, and the amount of the crushed paper stock 51 discharged from the crusher 30 is reduced.

If the amount of the crushed pre stock 51 to be supplied to the vertical cylindrical chamber 10 is reduced, disrupted already stock 51 by the rotation of the pulping rotor 17 and rotor 18 as described above is 撹拌, construed away in solution A homogeneous paper slurry is created. At this time, since the processing capacity for discharging the stock slurry from the outlet 13 is greater than the supply of the crushed stock 51, the liquid level gradually decreases.
Therefore, when the control device 46 detects that the liquid level has dropped to L1 by the measurement signal from the liquid level sensor 45, a drive signal is also sent to the push-up cylinder 36 and the pressure slider 38 side of the crusher 30. Then, the push-up plate 35 is lowered and the pressure slider 38 pressurizes the bail 50.

Therefore, according to the stock supply apparatus of this embodiment, continuous crushing is achieved by controlling the swing of the push-up plate 35 provided in the crusher 30 according to the liquid level in the vertical cylindrical container 10. In addition to enabling the supply of the used paper stock 51, it becomes possible to supply a fixed amount of the crushed paper stock 51 in a timely manner according to the change in liquid level.
This can be achieved by a simple configuration based on the measurement by the liquid level sensor 45 and the control of the crusher 30 by the control device 46.

In addition, this invention is not limited to the paper supply apparatus of the said embodiment, A various change is possible in the range which does not deviate from the meaning.
For example, in the above-described embodiment, the pressing slider 38 for preventing the so-called lifting of the bale is provided. However, the plurality of the bale 50 placed in the box-shaped container 31 is pushed by the rotary blades 33 and 33 with its own weight. It is not always necessary.

It is the figure which showed the whole structure of the continuous-type pulper. It is the conceptual diagram which showed one Embodiment of the paper supply apparatus which supplies the crushed paper stock to a continuous-type pulper. It is the figure which showed the crusher which comprises the paper supply apparatus of embodiment.

DESCRIPTION OF SYMBOLS 1 Continuous type pulper 10 Vertical cylindrical container 12 Supply port 17 Pulping rotor 18 Rotor 19 Screw feeder 30 Crusher 31 Box-shaped container 33 Rotary blade 35 Push-up plate 36 Push-up cylinder 38 Press slider 40 Conveyor 45 Liquid level sensor 46 Control device 50 Bale 51 Crushed paper stock

Claims (4)

In the paper supply apparatus for supplying the crushed paper stock to the continuous pulper that continuously discharges the paper slurry produced in the vertical cylindrical container ,
A crusher that crushes a bale, which is a lump of stock placed in a box-shaped container, with a pair of rotary blades provided at the bottom and discharges it downward, and a crushed paper material released from under the crusher A control device for controlling the driving of the crusher , and measuring the liquid level in the vertical cylindrical container and transmitting the measurement signal to the control device. And a liquid level sensor that
The crusher is provided with a push-up member that lifts the bale therein, and the control device controls the operation of the push-up member in accordance with the liquid level in the vertical cylindrical container. Paper supply device . In the paper supply apparatus according to claim 1,
The push-up member is a push-up plate that is pivotally supported in a box-shaped container of a crusher, and the control means has a drive means for swinging the push-up plate as a liquid level in the vertical cylindrical container. A paper supply device characterized by being driven and controlled in accordance with this. In the paper supply apparatus according to claim 2,
The paper supply device characterized in that the driving means for swinging the push-up plate is a cylinder on which a cylinder body is pivotally supported, and the tip of the rod is pivotally supported on the push-up plate. In the paper supply apparatus according to any one of claims 1 to 3,
The control device detects the liquid level of the upper limit value and the lower limit value, and when the upper limit value is detected, causes the bail in the crusher to be lifted by the lifting member, and when the lower limit value is detected, the lifting member A paper supply device characterized in that the paper is saved.

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