KR20070014363A - Apparatus and method of obtaining linerboard pieces from old corrugated cardboard by selectively defibering corrugated medium - Google Patents

Abstract

A method and a device for recovering liner board pieces from old corrugated cardboards by defibering corrugating media are provided to process an increased amount of waste old corrugated cardboards by using a pulper of a predetermined volume to separate liner board pieces from corrugating media and increase recycling of the waste corrugated cardboards. A method for recovering liner board pieces from old corrugated cardboards by defibering corrugating media includes the steps of inserting old corrugated cardboards into a pulper by an amount in the range from 3 to 6% of a volume tone of the pulper and inserting white water(S1), pulverizing the old corrugating cardboards by rotating a rotor of the pulper and disintegrating corrugating media(S2), discharging disintegrated corrugating media containing liner board pieces from a pulper container to a recovering tank(S3), filtering the liner board pieces from the disintegrated corrugating media by a vibration screen or a rotation drum screen(S4), carrying the separated liner board pieces to a compression package unit by a conveyor while evaporating water from the liner board pieces by a blower mounted below the conveyor(S5), inspecting and removing impurities such as plastic or styrofoam pieces when the liner board pieces are carried to the compression package unit by the conveyor(S6), compressing and packing the liner board pieces by a predetermined size by the compression package unit(S7), transferring and inputting the liner board pieces package by pulper(S8), and pumping the corrugating media stored in a chest to the chest of a factory(S9).

Description

Apparatus and method of obtaining linerboard pieces from old corrugated cardboard by selectively defibering corrugated medium}

1 is a process flow diagram schematically showing a method of dissociating a corrugated cardboard core first of the waste cardboard according to an embodiment of the present invention and then scooping out the lineage pieces;

Figure 2 is a schematic diagram of a system for dissipating a lineage piece after first dissociating the core core using a pulper and a rotating drum screen without a perforated plate according to an embodiment of the present invention,

Figure 3 is a schematic diagram of a system for dissociating a lineage piece after first dissociating the core using the pulper and vibrating screen without the perforated plate according to another embodiment of the present invention,

 4 is a schematic plan view of a system for dissociating corrugated core first using a pulper with two outlets instead of a perforated plate according to the present invention and then delivering a piece of lineage to the screen;

* Description of the symbols for the main parts of the drawings *

1: Pulper without perforated plate 2: White water tank

3: first white water valve 4: rota

5: switchgear 6: recovery tank

7: Shower 8: Second White Water Valve

9: Rotating Drum Screen 10: Goal Chest

11: Junk Box 12: Rotating Drum Outlet

13: conveyor belt 14: blower

15: Visual inspection table 16: Compression packaging machine

17: vibration motor 18: vibration screen

19: Lineage defragmentation bin 20: Pile of Lineage fragments

21: core chest 22: existing factory pulper

 23: Dose control panel

The present invention relates to a method and apparatus for separating and recycling old corrugated cardboard into lineage and corrugated paper, and in particular, in recycling recycled waste cardboard as a raw material for papermaking, the recycled value is separated from each other. It relates to a method and a device for raising the more effectively.

In general, Linaji contains more than 90% of unbleached kraft pulp, a long fiber, while the core core is composed of semichemical H / W Pulp (SCP), a short fiber. When recycled without separating, the long fiber content in the paper is lowered, the strength of the paper is lowered quality, there is a problem of lowering the recycling value.

Conventional waste cardboard separation apparatus for solving the above problems by discharging the waste corrugated cardboard from the pulper to discharge out of the pulper through the perforated plate of the pulper at the time when the corrugated core is dissociated using liner It is sent to the fiber chest, and the remaining lineage pieces that have not yet been dissociated in the pulp are dissociated and discharged through the same porous plate to be sent to the long fiber chest. However, such a conventional waste cardboard separation method has the following problems.

First, most of the pulper installed in the existing paper mill rotation speed is so high that the corrugated cardboard of the waste cardboard dissociates soon after the lineage pieces are dissociated and mixed with the dissociated corrugated paper material will encounter a problem of low separation efficiency.

Second, as disclosed in the international application PCT / KR02 / 01655 disclosed by the same inventor of the present application, the amount of waste cardboard and white water input is measured, respectively, and the concentration in the pulp when all the core cores are dissociated is calculated in advance. When the set value is reached, an automatic controller for discharging dissociated corrugated medium is installed and operated, but even in this case, the rotor must be continuously turned to prevent the perforated plate from being blocked when discharging dissociated corrugated medium through the perforated plate. While the dissociated bone cores are discharged, there is a problem that it is difficult to prevent the lineage pieces from being dissociated and mixed with the bone core material discharged.

Third, as disclosed in Korean Patent Application No. 0300780 and U.S. Patent No. 6,340,407 B1 disclosed by the same inventor of the present application, in the case of using the existing pulper, dissociate the wick from the corrugated cardboard first, and then discharge it back to the remaining lineage pieces. Since it is necessary to operate the pulper in a double batch method of discharging and dissociating it, it takes almost twice as much time to dissociate the waste cardboard of the same amount than dissociate the waste cardboard in a continuous pulping manner. However, when dissociating the plate by conventional pulper has a problem that the production efficiency of the existing line is halved.

Fourth, when dissociating waste corrugated cardboard into corrugated paper and liner paper to existing production line, it is necessary to remove the existing pulper and install the pulper which is 50% larger than the existing pulper in place. There is a problem in that the cost of installation and installation is high, and the plant must be shut down for a considerable time.

Fifth, there is a problem in that there must be a free space in the factory in order to solve the above problems and leave the pulper in place and install a new separation pulper having a volume of 50% larger. In addition, even if there is a free space in the factory to install a large capacity dedicated cardboard dissociation dissociation corrugated cardboard, there is a problem that the existing pulper is left without using, thereby lowering the facility utilization rate.

Sixth, as described in the international application PCT / KR02 / 01655 disclosed by the same inventor of the present application using a pulper without a perforated plate dissociated corrugated medium and pulper content mixed with liner pieces to a floating sorting tank It was proposed to wait for the material to sink and discharge it from the bottom of the tank.In this case, however, a tank 4-5 times larger than the pulper volume should be installed, and the amount of white water 4-5 times larger than the pulper volume should be flowed through the tank. However, it takes a long time for the dissociated corrugated medium to sink and separate from the tank, and since the concentration of the corrugated core material discharged from the tank is less than 1%, it is necessary to install an additional device to increase the concentration to meet the existing line standards. As it is sealed, it is difficult to apply to existing production lines.

The present invention devised to solve the above problems is to increase the recycling value of the waste cardboard by separating the corrugated cardboard and liner of the waste cardboard in the most practical and economic way while utilizing the facilities of the existing factory as it is. There is this.

In addition, the present invention is another object to provide a method and apparatus for separating lineage and corrugated medium to maximize the recycling efficiency by separating the waste corrugated cardboard into corrugated paper and liner paper most economically while maintaining the production efficiency of the existing production line.

In addition, the present invention has another object to provide a lineage regeneration method and apparatus that can maximize the lineage regeneration efficiency by using a separate recovery tank without using a porous plate.

Another object of the present invention is to provide a lineage regeneration method and apparatus for maximizing regeneration efficiency of lineage by installing a screen on each of one or more corrugated discharge paths after removing foreign substances.

In order to achieve the above object, the present invention, in the method for separating the waste cardboard corrugated paper and lineage pieces, the first step of dissociating the bone core by putting the waste cardboard with white water in the pulp; A second step of sending the pulp contents including the dissociated corrugated wicks and liner pieces to a predetermined recovery tank to remove heavy foreign substances; And a third step of sending the contents in the recovery tank to a non-fixed screen that is not fixed at a predetermined position, and separating each of the dissociated bone cores and liners contained in the contents.

In addition, the present invention, in the method for separating the waste cardboard corrugated paper and lineage pieces, the first step of dissociating the bone core by putting the waste cardboard with white water in the pulper; A second step of sending the pulp contents including the dissociated corrugated wicks and lineage pieces to the first and second recovery tanks through the first and second discharge paths to remove heavy foreign substances, respectively; And a third step of discharging the contents of the first and second recovery tanks to the first and second screens, respectively, to separate the dissociated rib cores and lineage pieces included in the contents.

In addition, the present invention is an apparatus for separating waste cardboard into corrugated cardboard and liner pieces, the corrugated core pulper having at least one outlet for dissociating the corrugated cardboard of the waste cardboard injected with white water, and discharged without filtering the contents; A recovery tank having a junk box for removing heavy foreign materials from the contents transferred from the core core dissociation pulper and a device for adjusting the input amount; A screen for sorting the liner pieces from the contents transferred from the recovery tank; And a lineage storage container for storing the lineage pieces selected on the screen.

In addition, the present invention is a device for separating the waste cardboard corrugated cardboard and liner pieces, the core core dissociation pulper having at least one discharge path for dissociating the corrugated cardboard of the waste cardboard injected with white water, and discharged without filtering the contents; At least one recovery tank having a junk box and an input amount control device for removing heavy foreign materials from the contents transported in connection with respective discharge paths of the core core dissociation pulper; At least one screen for sorting lineage pieces from the respective contents transferred from the recovery tank; A lineage storage container for storing the lineage pieces selected on the screen; And it characterized in that it comprises a conveyor system for drying and conveying the liner provided in the storage container.

Referring to Figure 1 described in detail how to increase the recycling value of the waste cardboard by separating the corrugated cardboard according to the corrugated cardboard and liner according to an embodiment of the present invention.

Unlike the conventional method of dissociating the corrugated cardboard and the linaji in dissociating the waste cardboard, the present invention proposes a method for separating the undissociated lineage pieces after dissociation of the corrugated cardboard. That is, the present invention proposes a method for maximizing the recovery rate of ligage without dissociating ligage and recovering ligage pieces that have not yet been dissociated after dissociation of corrugated core.

When explaining the lineage fragment recovery method of the present invention in detail.

In order to put the waste cardboard into the corrugated Harry Pulper, the amount of waste cardboard is added 3-6% of the volume of pulp pulp and then white water is added (S1).

Subsequently, the cardboard corrugated cardboard is pulverized by rotating the rotatable Harry Pulper, followed by dissociating the corrugated core first (S2).

When the concentration of dissociated bone core stock is measured by an automatic measuring device, when the concentration continues to rise and stops, this means that the core core has been dissociated and the lineage piece has reached a state that has not yet been dissociated. The lineage pieces are mixed in the corrugated core is poured into the recovery tank through the discharge port at the bottom of the pulp (bottom side) (S3). On the other hand, since the core core Harry pulper is discharged using a large hole instead of a perforated plate, the contents in the pulper flow down into the recovery tank without being virtually resisted, and thus discharged from the conventional separated Harry Pulper discharged through the small perforated plate. The speed is very fast.

Subsequently, the corrugated paper stock and linage fragments poured into the recovery tank are introduced into the vibrating screen or the rotating drum screen to extract only the lineage fragments and to discharge them. That is, the corrugated paper material supplied from the recovery tank and the corrugated paper material dissociated in the lineage piece mixture flow out from the bottom of the screen or the drum through the hole of the screen (vibration screen or rotating drum screen), so that the lineage piece is naturally filtered and separated. (S4). Meanwhile, when the contents are sent from the recovery tank to the screen, an appropriate amount must be supplied to prevent the processing capacity of the screen. For this purpose, the recovery tank is provided with an input amount adjusting function for adjusting the discharge amount. Furthermore, the foreign matter may be removed from the junk box provided in the recovery tank.

The separated pieces of lineage come out of the vibrating screen or the rotating drum screen and are collected in a specific container and supplied to the conveyor. The lineage pieces are transported to the compression packing machine until the lineage pieces do not absorb water. The air from the blower installed under the conveyor evaporates the water on the surface of the liner piece (S5).

On the other hand, when lineage pieces are transferred from the conveyor to the compression packing machine, foreign substances such as plastic pieces or styropol may be visually inspected and removed (S6). The compressed liner piece is then compressed and packed into a pile of liner pieces of a predetermined size by a compression packer (S7), stacked and transported to a pulp of an existing factory (S8).

On the other hand, the corrugated material stored in the corrugated chest is pumped to the corrugated chest of the existing factory through the pipe (S9).

Since the separation method of waste cardboard according to the embodiment of the present invention is very high, when using North American waste cardboard using natural kraft pulp in liner paper, the use of expensive natural kraft pulp is eliminated in existing plants. It has the advantage of greatly increasing the recycling value of corrugated cardboard. In addition, the method is a method of separating the core core of the waste corrugated cardboard using a conventional pulper because the lineage recovery step is simple and separates the core core from the waste cardboard using a recovery tank and screen without changing the existing separation and dissociation pulper Compared with this, the cost is greatly reduced.

In particular, the conventional dissociation dissociation pulper that dissociates the waste cardboard into corrugated core and lining paper using a double batch method, while the production efficiency is reduced by 50% in lineage regeneration, the present invention easily separates only the lineage pieces. This can dramatically increase production.

Moreover, the present invention does not separate the dissociated core core and lineage pieces using a porous plate, and the dissociated core core material and lineage papers are poured into the floating sorting tank through the outlets drilled in the pulp bottom. Because of separating the pieces, there is an advantage that the same liner recovery efficiency can be obtained by using a small amount of pulper, unlike the existing lineage recovery method that uses a tank and white water of 4 to 5 times the size of the pulper volume.

An apparatus for removing bone cores from a closed corrugated cardboard using a rotating drum screen according to an embodiment of the present invention will be described in detail with reference to FIG. 2.

First, when closing the switch 5 of the core core Harry pulper (1), and put the waste corrugated cardboard into the pulper and then open the first white water valve (3) to rotate the rota 4 while introducing white water from the white water tank (2) As a result, the waste cardboard is crushed into small pieces, the corrugated core is first dissociated, and the liner piece is undissociated.

At this time, the switch 5 is opened so that all the contents in the pulper tub (the mixture of dissociated core core stock and undissociated lineage pieces) are poured down into the recovery tank 6. In addition, the lower end of the recovery tank (6) is connected to the rotary drum screen (9), when the contents are poured into the recovery tank (6) from the pulp (1) the amount of the contents injected into the rotary drum screen (9) It enters the rotary drum screen (9) through the input control plate 23 for adjusting the weight, foreign matter contained in the contents are separated into the heavy foreign material junk box (11) installed on the bottom of the recovery tank (6). The rest of the contents are sent to the rotating drum screen (9). The rotating drum screen (9) is a wire mesh structure formed in the center of the circular tank in the form of a screen formed of a plurality of holes so that the core material to be separated easily flows out of the drum.

When the rotating drum screen 9 rotates, the dissociated core core material flows out of the circular tank to the lower end through the screen hole. In addition, the upper portion of the rotating drum screen is provided with a shower (7) connected to the second white water valve (8). The shower 7 washes away the pieces of lineage blocking the holes of the rotating drum screen 9 below the inside of the drum. When the rotating drum screen 9 rotates to reach the lower end, the dissociated core material is filtered and the lineage The pieces are slowly discharged out through the rotating drum outlet 12 while remaining in the drum. In this process, the corrugated material filtered by the rotary drum screen 9 is temporarily stored in the corrugated chest 10 and pumped through a pipe to the corrugated chest 21 of the existing factory.

Under the circular tank in which the rotating drum screen 9 is located, the conveyor belt 13 is transferred to the conveyor belt 13 through a liner piece collection container 19, and then the conveyor belt 13 is slowly moved while the blower 14 is installed thereunder. Moisture removed on the surface of the liner piece is removed and the foreign matter mixed with the liner piece is removed from the visual inspection table 15 and then compressed into a pile of liner piece 20 in the compression packer 16. The recovered lineage piece pile 20 is transported to the pulper 22 of the existing plant and then put into the pulper.

3 differs only in that it uses a vibrating screen 18 in place of the rotating drum screen 9 in FIG. The vibrating screen 18 is a plate-shaped screen, when the contents sent from the recovery tank 6 are transferred to the vibrating screen 18, the vibrating motor 17 shakes the screen 18 through the screen hole. While the dissociated corrugated paper is well drained underneath, while the shower (7) sprays white water on the vibrating screen (18) to wash the dissociated corrugated paper on the liner piece under the vibrating screen (8). There is a difference.

Figure 4 is a schematic plan view of a system for increasing the recycling value of the waste cardboard by separating the corrugated cardboard with corrugated cardboard and liner, according to the present invention, a plan view showing a path from the corrugated core pulper 1 to the conveyor belt 13 . As shown in the figure, the core core Harry pulper 1 according to the present invention is to form a switch 5 by drilling two holes in the lower end thereof. Each of the two switches 5 formed as described above discharges the contents of the core core Harry Pulper 1 to different paths to rescue the lineage pieces, thereby pouring out the contents of the Core core Harry Pulper 1 to dissociate the lineage pieces It can greatly reduce the time it takes to save the material. For example, each switch 5 is connected to the recovery tank 6 in different paths in parallel, and each recovery tank 6 is connected to the vibration screen 18 or the rotating drum screen 9 at the same time. It can filter out a piece of lineage paper, allowing more waste cardboard to be separated from the same volume of pulp.

Compared to the conventional separation and dissociation system, the present invention, on the one hand, uses the same volume of pulper to process 5 times more amount of waste cardboard to separate the lineage pieces and corrugate materials and on the other hand It is possible to increase the recycling value of waste corrugated cardboard by allowing factories to significantly reduce material costs by using long-fiber lined flakes as raw materials instead of expensive natural pulp while maintaining the original production efficiency without modifying the production line. To be.

Claims (19)

In the method of separating the waste cardboard into the core core and liner pieces, The first step of dissociating the bone core by putting waste cardboard together with white water into the pulper A second step of sending the pulp contents including the dissociated corrugated wicks and liner pieces to a predetermined recovery tank to remove heavy foreign substances; And And a third step of sending the contents in the recovery tank to a non-fixed screen which is not fixed at a predetermined position, and separating each of the dissociated corrugated cores and liners contained in the contents. The method of claim 1, The method, And adjusting the amount of contents sent to the non-fixed screen in the recovery tank. The method of claim 1, The non-fixed screen is a drum type rotary drum screen rotatably formed, wherein the contents from the recovery tank is supplied to the drum line of the rotary drum screen, characterized in that the drum. The method of claim 1, The non-fixed screen is a vibration screen vibrating by a vibration motor, the contents from the recovery tank is lineage piece separation method, characterized in that supplied to the upper portion of the vibration screen. In the method of separating the waste cardboard into the core core and liner pieces, A first step of dissociating the bone core by putting waste cardboard together with white water into the pulp; A second step of sending the pulp contents including the dissociated corrugated wicks and lineage pieces to the first and second recovery tanks through the first and second discharge paths to remove heavy foreign substances, respectively; And And a third step of discharging the contents of the first and second recovery tanks to the first and second screens, respectively, to separate the dissociated corrugated core and the lineage pieces included in the contents. The method of claim 5, The method, And adjusting the amount of content sent from the recovery tank to the first and second screens. The method of claim 5, And the first and second screens are rotated and vibrated by a motor as an unfixed screen which is not fixed at a predetermined position. The method of claim 7, wherein The first screen is a rotating drum screen of the drum type rotatably formed, the contents from the recovery tank is lineage piece separation method, characterized in that supplied to the drum of the rotating drum screen. The method of claim 8, The second screen is a vibrating screen vibrated by a vibrating motor, and contents from the recovery tank is supplied to the upper part of the vibrating screen, characterized in that the lineage. In the apparatus for separating the waste cardboard into the core core and liner pieces, Corrugated core pulper having at least one outlet for dissociating the core core of the waste corrugated cardboard introduced with white water, and discharged without filtering the contents; A recovery tank having a junk box for removing heavy foreign materials from the contents transferred from the core core dissociation pulper and a device for adjusting the input amount; A screen for sorting lineage pieces from the contents transferred from the recovery tank; And Lineage piece separating apparatus comprising a lineage storage container for storing the lineage piece sorted on the screen. The method of claim 10, The recovery tank, Lineage stripping device comprising a dose control panel for adjusting the amount of content sent to the first and second screen. The method of claim 10, The screen is a lineage piece separation device, characterized in that consisting of a rotatable drum-type rotating drum screen or a vibration screen vibrated by a vibration motor. The method of claim 12, And said rotating drum screen has a predetermined internal space for placing the liner piece from said recovery tank in the drum. The method of claim 12, The vibrating screen is a lineage piece separation device, characterized in that connected to the vibration motor in a predetermined plate-like structure for placing the liner piece on the top. In the apparatus for separating the waste cardboard into the core core and liner pieces, Dissociation of the bone core of the spent cardboard with white water, and the core core dissociation pulper having at least one discharge path for discharging without filtration of the pulp contents; At least one recovery tank having a junk box for removing heavy foreign materials from the contents conveyed in connection with respective discharge paths of the corrugated core pulper and a feed amount adjusting device; At least one screen for sorting lineage pieces from the respective contents transferred from the recovery tank; A lineage storage container for storing the lineage pieces selected on the screen; And Lineage piece separation device comprising a conveyor system for drying and conveying the liner provided in the storage container. The method of claim 15, The recovery tank, Lineage piece separation device, characterized in that it comprises a dose control panel for adjusting the amount of content sent to the screen. The method of claim 15, The screen is a lineage piece separation device, characterized in that consisting of a rotatable drum-type rotating drum screen or a vibration screen vibrated by a vibration motor. The method of claim 17, And said rotating drum screen has a predetermined internal space for placing the liner piece from said recovery tank in the drum. The method of claim 17, The vibrating screen is a lineage piece separation device, characterized in that connected to the vibration motor in a predetermined plate-like structure for placing the liner piece on the top.

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