JPH07207590A - Device for unbaling and feeding baled waste paper - Google Patents

Abstract

PURPOSE:To provide a baled waste paper-unbaling and feeding device capable of sufficiently unbaling baled waste paper comprising various kinds of waste paper, controlling the quantity of the unbaled waste paper fed into a dissolution tank, and subsequently feeding the dissolved waste paper into the next process as a prescribed concentration slurry. CONSTITUTION:The device for unbaling and feeding baled waste paper is provided with a slat conveyer 3 capable of changing the raising angle of its unloading part side, a dissolution tank 5 for mixing the unbaled waste with water to form a slurry, a measurer 6 for measuring the concentration of the slurry, and a computing unit 7. While the speed of the slat conveyer 3 and the raising angle of the unloading part side are controlled with a control means 8, the baled waste paper fed on the loading part side of the slat conveyer 3 is unbaled, dissolved into a prescribed concentration slurry, and subsequently fed into the next process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for unpacking bale waste paper, and more specifically, a device for unpacking bale waste paper in which waste paper, which is a raw material for papermaking, is packed under pressure to form a slurry having a predetermined concentration. Regarding

[0002]

2. Description of the Related Art Conventionally, used paper used as a raw material for papermaking has a predetermined amount of used paper of 120 to 150 from the viewpoint of transportation and storage location.
A so-called bale waste paper with a weight of about 1 ton and a height of 1 m × width 1 m × length 2 m is produced by pressurizing at a high pressure of kg / cm ³ and solidifying. When such waste bale paper is used as a papermaking raw material, the waste bale paper is unpacked, dissolved in water, made into a slurry, and then sent to the papermaking process.

[0003]

At this time, the raw material concentration (slurry concentration) in the slurry must be kept within a substantially constant range in order to ensure stable productivity. For example, when the slurry concentration is high Then, there is a problem that a large load is applied to a pump that feeds the slurry, making it difficult to feed the liquid, and if the slurry concentration is low, the processing efficiency deteriorates.

Therefore, it is necessary to appropriately control the amount of waste paper and the amount of water supplied to the dissolving tank (pulper) that dissolves the unpacked used paper in water. However, when only the amount of water supplied to the dissolving tank is controlled. The amount of water that must be reduced when the amount of used paper supplied is small, which means that the amount of water to be processed relative to the size of the dissolving tank decreases. Conversely, when the amount of used paper supplied is large, the amount of water used increases when the amount of used paper is increased. The slurry will overflow.

From the above, in order to make the amount of slurry in the dissolving tank substantially constant and to stably obtain a predetermined processing amount, the amount of waste paper supplied to the dissolving tank in accordance with the slurry concentration in the dissolving tank The amount must be controlled to be approximately constant.

Therefore, as an apparatus for unpacking and supplying a fixed amount of waste bale paper, the belt conveyors are arranged so as to face each other vertically, and the upper conveyor is rotated in a direction opposite to the conveying direction of the waste paper to obtain the waste bale paper. There is proposed a crushing unit for unpacking and a take-out conveyor provided with a weighing machine. This device is designed to regulate the speed of the upper and lower conveyors of the crushing section based on the signal from the weighing machine of the take-out conveyor, and thereby to quantitatively supply the bale waste paper while unpacking.

However, in the crushing section composed of the upper and lower conveyors, although the bale waste paper made of newspaper waste paper can be unpacked, one sheet is large in shape and soft,
For example, waste paper such as corrugated cardboard, high-quality paper, magazine raw material, etc. is rotated and crushed between the upper conveyor and the lower conveyor as the upper and lower conveyors move in opposite directions, and is crushed into a cylindrical shape. I couldn't.

Therefore, the present invention sufficiently unpacks the bale waste paper made of various kinds of waste paper, controls the supply amount of the unpacked waste paper to the melting tank, and sends the waste paper as a slurry having a predetermined concentration to the next step. It is an object of the present invention to provide an unpacking and feeding device for used bale waste paper.

[0009]

In order to achieve the above object, a baling waste paper unpacking and feeding device of the present invention is a slat conveyor for baling waste paper unpacking, in which the rising angle on the unloading side is variable, The slat conveyor is equipped with a dissolution tank for mixing waste paper unpacked with water and water to make the waste paper into a slurry state, and a slurry concentration measuring means for measuring the slurry concentration in the dissolution tank. A device for unpacking bale waste paper supplied to the unit side and supplying it in the form of a slurry having a predetermined concentration, the speed of the slat conveyor and the unloading unit according to the slurry concentration measured by the slurry concentration measuring means. It is characterized in that it is provided with control means for adjusting at least one of the rising angles on the side.

[0010]

[Operation] According to the above configuration, a large bale waste paper having a high center of gravity falls to the loading section side while rising on the unloading section side of the slat conveyor, and is unpacked due to the impact when falling. Since the center of gravity of unpacked waste paper is low, it rises to the end on the unloading side and falls from the end. At this time, by adjusting the rising angle and speed of the slat conveyor, it is possible to control the carry amount of the unpacked waste paper.

Therefore, the concentration of the slurry in the dissolving tank is measured by the slurry concentration measuring means, and the rising angle and speed of the slat conveyor are adjusted according to the slurry concentration to control the amount of waste paper supplied to the dissolving tank. A slurry having a predetermined concentration can be obtained. That is, when the measured slurry concentration is low, the rising angle on the unloading side is reduced, or the speed is increased to increase the amount of used paper supplied, and when the slurry concentration is high, the rising angle on the unloading side is increased, Slow down speed to reduce waste paper supply.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in more detail based on an embodiment shown in the drawings. FIG. 1 is a system diagram showing the overall configuration of the unwrapping supply device for used bale waste paper according to the present invention, FIG. 2 is an explanatory view of a slat conveyor, and FIG. 3 is an explanatory view of a measuring device as a slurry concentration measuring means.

The unwrapping supply device for waste bale paper shown in FIG.
A supply conveyor 2 for supplying the bale waste paper 1, a slat conveyor 3 and an auxiliary conveyor 4 for unpacking and quantitatively supplying the bale waste paper 1, and a dissolution tank 5 for dissolving the unpacked waste paper in water to form a slurry. A meter 6 and a calculator 7 which are slurry concentration measuring means for measuring the concentration of the slurry dissolved in the dissolving tank 5, and a control for controlling the slat conveyor 3 in accordance with the slurry concentration obtained by the calculator 7. And part 8.

The slat conveyor 3 has a large number of slat link plates continuously attached to the conveyor chain. As shown in FIG. 2, the slat conveyor 3 guides the conveyor chain and the unloading section side conveyor frame 31 and the unloading section. By connecting the conveyor belt 32 to the conveyor belt 32 at the hinge portion 33, the rising angle of the conveyor frame 32 at the unloading portion can be changed. The loading section side conveyor frame 31 is fixed to the supply conveyor 2 side in a substantially horizontal direction, and the loading section side conveyor frame 32 is provided.
Activates the cylinder 34 supporting the frame 32 to increase the lifting angle by 3 around the hinge 33.
It is configured to be adjustable in the range of 5 to 45 degrees.

The hinge portion 33 is provided at the center point between the guide portion 35 of the upper loading side conveyor chain and the guide portion 36 of the lower return side conveyor chain of the slat conveyor 3. Therefore, when changing the rising angle of the conveyor frame 32 on the unloading side, the length of the conveyor chain on the lower return side changes as much as the length of the conveyor chain on the upper loading side changes. You can change the rising angle without. For example, the unloading side conveyor frame 32
When the rising angle of is increased, the stroke of the upper conveyor side conveyor chain is shortened, but the stroke of the lower return side conveyor chain is lengthened accordingly, and the overall length of the conveyor chain is always kept constant. Thereby, it becomes possible to extremely easily adjust the rising angle of the unloading side conveyor frame 32 while simplifying the configuration of the slat conveyor 3.

The auxiliary conveyor 4 provided above the tip of the slat conveyor 3 on the unloading side is, like the slat conveyor 3, a slat conveyor in which a large number of slat link plates are continuously attached to a conveyor chain. Thus, the moving direction of the auxiliary conveyor 4 is set to be opposite to the used paper feeding direction of the slat conveyor 3. The distance between the auxiliary conveyor 4 and the slat conveyor 3 is set to be narrow at the front end on the used paper delivery side and sufficiently wide at the base side.

The auxiliary conveyor 4 supports the loading section side end of the slat conveyor 3 by means of a shaft 41. The loading section side defines only the lower limit position and the loading section side can freely rotate upward. Even if a large lump of waste paper bites between the slat conveyor 3 and the auxiliary conveyor 4, the unloading side of the auxiliary conveyor 4 rotates upwards to release stress, It is designed to prevent damage to both conveyors.

The bale waste paper 1 supplied from the supply conveyor 2 to the loading portion side of the slat conveyor 3 is conveyed to the unloading portion side set at a predetermined rising angle by the operation of the slat conveyor 3 and has a high center of gravity. Large-sized bale waste paper and large lumps fall to the loading section side while rising on the unloading section side. The bale waste paper or the lump of waste paper that has dropped to the loading side is unpacked by the impact of its own drop, and rises again to the loading side. The waste paper, which has a predetermined size due to the unpacking, is raised to the end on the unloading side and supplied to the melting tank 5 from the end. Furthermore, a piece of waste paper of a certain size that could not be fully unpacked in one drop,
It is unpacked to a predetermined size while repeating the fall from the unloading side to the loading side.

Further, solidified paper containing more water than normal waste paper, entangled waste paper, and some special waste paper are loaded from the unloading side. Although it may rise to the tip of the unloading side without falling to the side of the loading section, even in such a case, if the size is a predetermined size or more, the load is loaded when the upper part comes into contact with the auxiliary conveyor 4. It falls to the side of the department and is unpacked due to the impact of falling.

The relationship between the ascending angle on the unloading side of the slat conveyor 3 and the supply amount of unpacked waste paper is, for example, when the ascending angle is 35 degrees, the entire amount is conveyed and supplied, and the ascending angle is 45 degrees. Sometimes it is in a state where it is hardly transported. Therefore, by adjusting the ascending angle on the unloading side within this range, it is possible to arbitrarily control the supply amount of unpacked waste paper.

The slat conveyor 3 is provided with a sensor 36 for detecting the amount of used paper on the conveyor 3. When the amount of used paper on the slat conveyor 3 becomes less than a predetermined amount, the supply conveyor 2 is operated. It is configured to feed the waste bale paper 1 that is operatively stocked on the conveyor onto the slat conveyor 3.

The dissolution tank 5 dissolves the dilution water supplied from the dilution water supply pipe 51 and the waste paper unpacked and supplied by the slat conveyor 3 by stirring and mixing with a stirring blade (not shown), The used paper in the slurry state is slurried in the dissolution tank 5, is withdrawn from the slurry delivery pipe 52 at the bottom of the bath, is sent by the pump 53 to the next step via the delivery pipe 54, and a part of the waste paper is sent. , Is branched into a pipe 55 and sent to the measuring device 6.

As shown in FIG. 3, the measuring device 6 includes a slurry container 62 having a flange portion 61 on an outer edge of an upper edge thereof, and a slurry supply pipe 63 for supplying the slurry from the dissolution tank 5 into the slurry container 62. A weighing scale 64 for measuring the weight of the slurry container 62, a receiving tank 65 provided on the outer peripheral side of the slurry container 62 for receiving the slurry overflowing from the upper edge of the slurry container 62, and a receiving tank 65 inside the receiving tank 65. It is composed of a lead-out pipe 66 for leading out the overflowed slurry and returning it to the dissolution tank 5.

This measuring instrument 6 uses the fact that the fluidity of the slurry changes depending on the slurry concentration, and is more accurate than the case where the slurry concentration is simply determined by measuring the weight of the slurry accumulated in the container and calculating the slurry concentration from the specific gravity difference. Various measurements can be performed. That is, since the fluidity of the slurry decreases as the concentration thereof increases, the fluidity decreases as the concentration of the slurry increases, and the amount of the slurry accumulated on the collar 61 increases, and the weight of the slurry is increased by the weight of the slurry container. Since it adds to the weight of the slurry in 62, the amount of change in weight measured by the weight scale 64 becomes large. Therefore, the change in the slurry concentration can be accurately measured, and the control accuracy can be improved.

The computing unit 7 calculates the slurry concentration from the weight measured by the weight scale 64 of the weighing unit 6 based on the preset relationship between the slurry concentration and the weight. The density is output to the control unit 8.

The control unit 8 controls the rotation speed of the motor 37 of the slat conveyor 3, a position controller 82 for detecting the rising angle of the slat conveyor 3 on the unloading side, and the cylinder 34. It comprises a position detector 83 provided in the part and a driver 84 for expanding and contracting the cylinder 34 by the output of the position controller 82 to change the rising angle of the slat conveyor 3 on the unloading side.

The controller 8 operates so as to reduce the amount of used paper supplied to the dissolving tank 5 when the slurry concentration calculated by the calculator 7 is high, and increases the amount of used paper supplied to the dissolving tank 5 when the slurry concentration is low. Works like. That is,
When the slurry concentration obtained by the calculator 7 is high, the speed controller 81 lowers the rotation speed of the motor 37 to decelerate the slat conveyor 3 and raises the unloading side to reduce the amount of used paper supply. On the other hand, when the slurry concentration obtained by the calculator 7 is high, the speed controller 81 increases the rotation speed of the motor 37 to speed up the slat conveyor 3 and lowers the unloading side to increase the amount of used paper supply. .

In this way, the concentration of the slurry in the dissolution tank 5 is continuously measured by the measuring device 6, and the amount of waste paper supplied from the slat conveyor 3 is adjusted according to the slurry concentration at that time, whereby the dissolution is performed. The concentration of the slurry in the tank 5 can be controlled to a substantially constant concentration, and the raw material concentration of the slurry to be sent to the next step can be kept substantially constant.

[0029]

As described above, the device for unpacking waste bale paper according to the present invention is capable of continuously unpacking and supplying waste bale paper, and changes the rising angle on the unloading side. Equipped with a slat conveyor that can adjust the supply amount of unpacked waste paper by doing, and a slurry concentration measuring unit that can accurately measure the slurry concentration in the dissolution tank, and measure with the slurry concentration measuring unit Since the slat conveyor is controlled according to the slurry concentration, and the amount of waste paper supplied into the melting tank is adjusted,
The slurry having a predetermined concentration can be stably sent to the next step, and the efficiency of the paper manufacturing step can be improved.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, and is a systematic diagram showing an overall configuration of an unpacking supply device for bale waste paper.

FIG. 2 is an explanatory diagram of a slat conveyor.

FIG. 3 is an explanatory diagram of a measuring device that is a slurry concentration measuring unit.

[Explanation of symbols]

1 ... Bale waste paper, 2 ... Supply conveyor, 3 ... Slat conveyor, 4 ... Auxiliary conveyor, 5 ... Melting tank, 6 ... Measuring device, 7 ... Computing device, 8 ... Control unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Seiji Katsumata 2 at 49 Kusawa, Fuji City, Shizuoka Prefecture Katsuma Welding Industry Co., Ltd. (72) Inventor Fumiko Katsumata 2 at 49 Hisawazawa, Fuji City, Shizuoka Prefecture Also in the welding industry

Claims (4)

[Claims] 1. A slat conveyor for unpacking bale waste paper with a variable rising angle on the unloading side, and a dissolving tank for mixing waste paper unpacked by the slat conveyor and water to form a waste paper slurry state. And a slurry concentration measuring means for measuring the slurry concentration in the dissolution tank, and an apparatus for unpacking the bale waste paper supplied to the loading side of the slat conveyor to form a slurry having a predetermined concentration. There is provided a veil wastepaper characterized by including control means for adjusting at least one of the speed of the slat conveyor and the rising angle on the unloading side according to the slurry concentration measured by the slurry concentration measuring means. Unpacking feeder. 2. The slat conveyor has a base of a unloading side conveyor frame, a base of the unloading side conveyor frame, an upper loading side conveyor chain and a lower return of the conveyor at a delivery end of a loading side side conveyor frame fixed in a substantially horizontal direction. 2. An unpacking and feeding device for waste bale paper according to claim 1, wherein the conveyor belt is rotatably connected to the side conveyor chain so that the rising angle of the conveyor frame on the unloading side can be changed. 3. An auxiliary conveyor for collapsing a load that moves in a direction opposite to the delivery direction of the slat conveyor is provided above the tip of the slat conveyor on the unloading side at a predetermined interval from the slat conveyor. An unpacking supply device for waste bale according to claim 1. 4. The slurry concentration measuring means comprises a slurry container having a flange on an outer edge of an upper edge, a slurry supply pipe for supplying the slurry extracted from the melting tank into the slurry container, and a weight of the slurry container. A weighing scale for measuring, a receiving tank for receiving the slurry overflowing from the upper edge of the slurry container, and a lead-out pipe for leading out the overflowing slurry into the receiving tank, and a measurement value of the weighing scale, The unveiling supply device for used bale waste paper according to claim 1, further comprising arithmetic means for calculating a slurry concentration by comparing with a preset weight setting value according to a specific gravity that changes depending on the slurry concentration.