JPH09132890A - Ink removing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact ink removing device capable of easily and surely removing not only a printing ink but also a magnetic ink from a pulp liquid. SOLUTION: This ink removing device is obtained by installing a pulp liquid storing vessel 3 for storing the pulp liquid X containing beaten wastepaper fibers and added with an ink removing agent, and a pulp liquid agitating and flowing device 2 for flowing while agitating the pulp liquid X at the upper position of the storing vessel 3. The agitating and flowing device 2 is equipped with partitioning plates 14, 15 for agitating the pulp liquid X. By flowing down the pulp liquid X from a discharging port 12 to the storing vessel 3, foam Y is formed in the pulp liquid X. A pulp liquid sending out device 4 is installed for sending the pulp liquid X to the agitating and flowing device 2 from the storing vessel 3, and a foam removing device 5 is installed for removing the foam Y generated in the storing vessel 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deinking device for deinking by separating ink components such as printing ink and magnetic ink from waste paper fibers when recycling waste paper.

[0002]

2. Description of the Related Art Recently, old papers such as old newspapers and old magazines, which have been conventionally disposed of as garbage, are collected and recycled.

To recycle the waste paper, first, the waste paper fibers are disintegrated in water by a disintegrator (pulper).

The disaggregation apparatus disintegrates the waste paper fibers into a pulp liquid by throwing the waste paper into water and stirring it together with water. At this time, a deinking agent that removes ink components such as printing ink from the waste paper fibers by deinking is added, and the pulp liquid generated by the disintegrator is separated into waste paper fibers and ink components such as printing ink. .

Next, an ink component such as printing ink is removed from the pulp liquid by a deinking device (floatator).

Conventionally, this type of deinking apparatus has a pulp liquid storage tank for storing pulp liquid, and air is forcedly fed into the pulp liquid in the pulp liquid storage tank by an air pump or the like to generate air bubbles in the pulp liquid. It is provided with a bubble generating device for generating and a bubble removing device for removing the bubbles adsorbing the ink component from the pulp liquid. In this type of deinking device, a plurality of pulp liquid storage tanks are connected in series, and each of the storage tanks is provided with the bubble generating device and the bubble removing device. The pulp liquid is sequentially sent to a plurality of pulp liquid storage tanks. The ink component in the pulp liquid is aggregated into an appropriate size by the action of the deinking agent in each pulp liquid storage tank, adsorbed by the bubbles, and floated on the pulp liquid surface. The air bubble removing device collects air bubbles floating in the pulp liquid storage tank and overflowing from the pulp liquid storage tank, and removes impurities other than ink components and fibers adsorbed to the air bubbles. Then, the deinked pulp liquid is sent to a paper machine to be recycled paper.

In order to sufficiently remove the ink components in the pulp liquid with this deinking device, it is necessary to carry out deinking with a plurality of pulp liquid storage tanks that are connected in series, and the above-mentioned bubbles are contained in each pulp liquid storage tank. Since the generation device and the bubble removing device must be provided, not only the structure of the deinking device becomes complicated, but also it becomes expensive and space-consuming.

[0008] Further, since papers rich in fibers are used as papers for entrance tickets for expressways and tickets for automatic ticket gates, fine paper can be obtained by recycling.

However, since these tickets are printed with magnetic ink, the magnetic ink must be removed in order to reproduce them.

Since the magnetic ink uses magnetic particles such as γ-iron oxide, even if the magnetic ink is peeled off from the waste paper fiber by the deinking agent, it is difficult for the deinking apparatus to adsorb the bubbles to the deinking apparatus. It is difficult to remove it completely.

Therefore, in order to reproduce, the magnetic ink portion must be cut off, which is troublesome and costly.

Therefore, there has been a demand for a deinking device capable of surely removing not only printing ink but also magnetic ink from pulp liquid of waste paper.

[0013]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a deinking device which is compact and capable of easily and reliably removing not only printing ink but also magnetic ink from pulp liquid. The purpose is to do.

[0014]

In order to achieve the above object, the present invention disperses waste paper fibers by throwing waste paper into water and stirring, and peels ink components such as printing ink from the waste paper fibers. A pulp liquid storage tank for storing a pulp liquid to which a deinking agent containing a surfactant is added, and the pulp liquid is allowed to flow while being stirred at a position above the pulp liquid storage tank, and the pulp liquid is stored. A pulp liquid agitation fluidizing device that flows down from above the liquid surface of the pulp liquid in the tank,
A pulp liquid delivery device for delivering the pulp liquid in the pulp liquid storage tank to the pulp liquid agitation fluidizing device, and the pulp liquid storage tank by causing the pulp liquid to flow down from the pulp liquid agitation fluidizing device to the pulp liquid storage tank. A bubble removing device for removing the ink components adsorbed to the bubbles together with the bubbles generated therein, wherein the pulp liquid agitation flow device comprises a bottom plate inclined toward the flow direction of the pulp liquid, and the bottom plate. Side wall plates standing on both sides of the top plate, a top plate facing the bottom plate, and standing upright on the bottom plate with a predetermined interval, and the upper end has a gap from the top plate orthogonal to the flow direction of the pulp liquid. A plurality of bottom plate partition plates formed by alternately forming a plurality of bottom plates that are provided on the top plate alternately with the bottom plate partition plates and have a lower end orthogonal to the flow direction of the pulp liquid and having a gap from the bottom plate. A board partition board,
An inlet provided at an upstream portion of the top plate for injecting a pulp liquid onto the bottom plate, and a pulp liquid provided along the bottom plate and flowing along the bottom plate into a pulp liquid in the pulp liquid storage tank. And a discharge port for discharging the liquid from above and flowing down.

The deinking device of the present invention causes the pulp liquid to flow into the storage tank from above through the pulp liquid stirring and flowing device. Bubbles can be generated in the pulp liquid in the storage tank by the impact at this time. As a result, even without a bubble generating device such as an air pump provided in the conventional deinking device, it is possible to generate sufficient bubbles in the pulp liquid in the storage tank by flowing down the pulp liquid, which simplifies the device configuration. Can be converted. Further, since the pulp liquid delivery device can circulate the pulp liquid again from the pulp liquid storage tank to the pulp liquid storage tank via the pulp liquid agitation flow device, the ink component remaining in the pulp liquid can be supplied to the pulp liquid a plurality of times. It is possible to give an opportunity to adsorb to the air bubbles over, and it is possible to perform sufficient deinking in one pulp liquid storage tank.
Accordingly, it is not necessary to provide a plurality of pulp liquid storage tanks, and the deinking device can be made compact. Further, the pulp liquid passing through the pulp liquid stirring and fluidizing device is
Turbulence is generated when flowing through each partition plate. As a result, the pulp liquid is agitated, and the ink component can be reliably separated from the waste paper fibers in the pulp liquid.

Further, in the present invention, the pulp liquid storage tank is provided with a bottomed cylindrical bubble generating unit for receiving the pulp liquid discharged from the pulp liquid delivery device and generating bubbles. .

In the deinking device of the present invention, the pulp liquid delivery device causes the pulp liquid in the pulp liquid storage tank to flow down from a position above the bubble generating portion provided in the pulp liquid storage tank. Bubbles can be generated in the pulp liquid in the bubble generating section by the impact at this time. As a result, even without a bubble generating device such as an air pump provided in the conventional deinking device, it is possible to generate sufficient bubbles in the pulp liquid in the storage tank by flowing down the pulp liquid, which simplifies the device configuration. Can be converted. Further, by providing the bubble generating unit, bubbles are generated in the bubble generating unit, and the vigorous flow of the pulp liquid containing bubbles at that time does not spread to the entire pulp liquid storage tank. It is possible to extremely reduce the inclusion of air bubbles in the pulp liquid delivery path by the delivery device.

Further, a magnet for adsorbing the magnetic ink in the pulp liquid is provided in the pulp liquid circulation path consisting of the pulp liquid stirring and flowing device, the pulp liquid storage tank, and the pulp liquid delivery device. And And the magnet is
It is preferably provided in the pulp liquid stirring and fluidizing device.

A magnet for adsorbing the magnetic ink in the pulp liquid is provided in the pulp liquid stirring and flowing device.

The magnetic ink in the pulp liquid delivered from the pulp liquid storage tank is adsorbed to the magnet. This makes it possible to sufficiently remove the magnetic ink in the pulp liquid even if it is a pulp liquid from which waste paper containing magnetic ink has been disintegrated, and a pulp liquid that can recycle high-quality recycled paper is available at a low cost. Can be obtained.

The pulp liquid delivery device includes a pulp liquid delivery pipe attached to a pulp liquid delivery port for delivering the pulp liquid from the pulp liquid storage tank, a pulp liquid delivery pump for delivering the pulp liquid, and the pulp liquid delivery device. It is characterized by comprising a pulp liquid delivery pipe for delivering the pulp liquid to the inlet of the pulp liquid agitation fluidizing device by a pump.

Further, the bubble removing device is provided along the outer periphery of the pulp liquid storage tank, and has a gutter-shaped bubble receiver for receiving bubbles overflowing from the storage tank and the bubble of the bubble receiver outside the storage tank. And a bubble storage tank for storing the bubbles discharged by the bubble discharge pipe.

The ink components separated from the waste paper fibers by the deinking agent are adsorbed by the bubbles generated in the pulp liquid. By removing the bubbles with the bubble removing device, the ink component can be efficiently removed from the pulp liquid.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the deinking device of the present invention will be described below. FIG. 1 is an explanatory view showing the deinking device of the present embodiment in a side view with a main portion broken, and FIG. 2 is an explanatory front view of the deinking device of the present embodiment.

The deinking apparatus 1 of the present embodiment is an apparatus for deinking by removing ink components such as printing ink and magnetic ink from the pulp liquid X produced by previously disintegrating waste paper by a disintegration apparatus (not shown).

The pulp liquid X is a liquid in which a waste paper fiber is disintegrated by stirring waste paper with water, and a deinking agent is added to remove and deink ink components such as printing ink and magnetic ink from the waste paper fiber. . The deinking agent contains a surfactant and the like, and along with the disintegration of the waste paper fibers by the disintegrator, promotes the separation of ink components such as printing ink and magnetic ink from the fibers and the generation of bubbles in the pulp liquid X.

In FIGS. 1 and 2, 2 is a pulp liquid agitation flow device, 3 is a pulp liquid storage tank, 4 is a pulp liquid delivery device, and 5 is a bubble removing device. In addition, 6 is a magnet,
By providing the magnet 6, magnetic ink can be adsorbed as described later.

As shown in FIG. 1, the pulp liquid agitating and flowing apparatus 2 comprises a gutter-shaped box body 10 composed of a top plate 7, a bottom plate 8 and a side wall plate 9, and is detached from the starting end of the box body 10. An inlet 11 for injecting the pipe liquid X for blackening is provided at the end portion of the pulp liquid X.
A discharge port 12 for discharging
And a discharge port 12 are provided with a pulp liquid agitation flow path 13 for agitating and flowing the pulp liquid X injected, and the top plate 7 and the bottom plate 8 of the pulp liquid agitation flow path 13 are alternately placed at predetermined intervals. A device provided with a plate partition plate 14 and a bottom plate partition plate 15. The pulp liquid X is directed from the inlet 11 to the outlet 12 on a support frame 17 provided on the frame 16 of the deinking device 1. It is fixed with a slope so that it can flow.

The top plate partition plate 14 and the bottom plate partition plate 15 provided at a plurality of positions in the pulp liquid agitation flow path 13 are provided so as to be orthogonal to the flowing direction of the pulp liquid X, and the top plate partition plate 14 is provided. Since the lower end of the bottom plate has a gap from the bottom plate 8 and the upper end of the bottom plate partition plate 15 has a gap from the top plate 7, the respective gaps between the top plate partition plate 14 and the bottom plate partition plate 15 are formed. When the pulp liquid X flows through the pulp liquid X, the pulp liquid X is agitated by the partition plates 14 and 15, so that the separation of ink components such as printing ink and magnetic ink from the waste paper fibers of the pulp liquid X is promoted. .

Of the ink components that have been peeled off, the printing ink is comparatively light, and therefore, together with the pulp liquid X, from the discharge port 12,
It is discharged toward a pulp liquid storage tank 3 described later.

As shown in FIG. 1, the pulp liquid storage tank 3 receives the pulp liquid X discharged from the discharge port 12 of the pulp liquid agitation fluidizer 2 and flows down, and the impact when the pulp liquid X flows down. A bubble-generating unit 19 having a cylindrical shape with a bottom for generating bubbles Y and a pulp liquid storage unit 20 for storing the pulp liquid X overflowing from the bubble generating unit 19 are provided. The pulp liquid storage unit 20 discharges the pulp liquid X from the pulp liquid storage unit 20 by a trough-shaped bubble receiver 21 forming a part of the bubble removal device 5 described later and the pulp liquid delivery device 4 described later. And a pulp liquid discharge port 22 are provided. The bubble receiver 21 is provided on the side wall 2 of the pulp liquid storage section 20.
3 is provided along the upper edge of the pulp liquid discharge port 22.
Is provided in the lower part of the pulp liquid storage part 20 through an inclined surface that gradually converges from the lower edge of the side wall 23 of the pulp liquid storage part 20 toward the center of the bottom part thereof.

As shown in FIG. 1, the pulp liquid delivery device 4 has a pulp liquid discharge pipe 24 attached to a pulp liquid discharge port 22 for discharging the pulp liquid X in the pulp liquid storage section 20, and the pulp liquid discharge pipe 24. A pulp liquid delivery pump 25 for delivering the pulp liquid X discharged through the discharge pipe 24, and a pulp liquid delivery pipe 2 for delivering the pulp liquid X to the inlet 11 of the pulp liquid agitation flow device 2 by the pulp liquid delivery pump 25.
6

As shown in FIG. 1, the bubble removing device 5 is provided along the upper edge of the side wall 23 of the pulp liquid storage section 20 and beyond the upper edge of the side wall 23 of the pulp liquid storage section 20. Bubble receiver 2 that receives bubble Y overflowing from
1, a bubble discharge pipe 27 for discharging the bubbles Y of the bubble receiver 21 to the outside of the pulp liquid storage tank 3, and a bubble storage tank 2 for storing the bubbles Y discharged by the bubble discharge pipe 27.
8 and.

As will be described later in detail, impurities other than the printing ink and fibers separated by the bubbles Y are adsorbed, and the bubbles removing device 5 removes impurities other than the printing ink and fibers from the pulp liquid X in the pulp liquid storage tank 3. To be removed.

Further, the pulp liquid delivery pipe 26 has
As shown in FIG. 2, a deinking pulp liquid discharge cock 29 that discharges the deinked pulp liquid from the deinking device 1 is provided.

The magnet 6 is for adsorbing the magnetic ink in the pulp liquid X, and is provided on the bottom plate 8 of the pulp liquid stirring flow path 13 of the pulp liquid stirring flow device 2 as shown in FIG. ing.

Pulp liquid X containing disaggregated magnetic ink
Is agitated and fluidized in the pulp fluid agitation fluid passage 13 of the pulp fluid agitation fluidizer 2, and the relatively heavy magnetic ink separated from the waste paper fibers in the pulp fluid X is the bottom plate of the pulp fluid agitation fluid passage 13. It is adsorbed by the magnet 6 provided in 8 and is retained by being locked to the bottom plate partition plate 15 at the bottom of the pulp liquid agitation flow path 13. The stored magnetic ink is removed by an apparatus (not shown).

Next, the deinking process by the deinking device 1 of this embodiment will be described with reference to FIG. First, the pulp liquid X previously generated by the disaggregation apparatus is injected from the open upper portion of the pulp liquid storage tank 3.

Next, the pulp liquid delivery pump 25 is operated to deliver the pulp liquid X in the pulp liquid storage section 20 of the pulp liquid storage tank 3 through the pulp liquid discharge pipe 24 and the pulp liquid delivery pipe 26. The pulp liquid delivery pipe 26
The pulp liquid X sent out from the above flows through the pulp liquid stirring / flowing path 13 of the pulp liquid stirring / flowing device 2. At this time, the pulp liquid X flows through the partition plates 14 and 15 while generating a turbulent flow, and promotes the separation of the ink component from the waste paper fibers. At this time, the pulp liquid X flows on the magnet 6, and the magnetic ink in the pulp liquid X is adsorbed on the magnet 6. As a result, the magnetic ink can be removed from the pulp liquid X, and when the pulp liquid X is a waste paper rich in fibers such as an entrance ticket for a highway, it is possible to produce high-quality recycled paper. The pulp liquid X can be used. Further, since the pulp liquid X can be circulated multiple times by the pulp liquid delivery device 4, the pulp liquid X
The pulp liquid X can be made to flow over the magnet 6 until the magnetic ink is sufficiently removed from the.

Next, the pulp liquid X which has passed through the pulp liquid stirring and flowing device 2 flows down from the discharge port 12 to the bubble generating portion 19 of the pulp liquid storage tank 3. The pulp liquid X that has flowed down to the bubble generation unit 19 generates bubbles Y due to the impact at that time. As a result, it is not necessary to provide a bubble generating means such as an air pump as in the conventional case, and the device configuration can be simplified. Further, since the bubble generation unit 19 is a bottomed cylindrical container as described above, the pulp liquid X does not flow directly from the discharge port 12 to the pulp liquid storage unit 20, and the generated bubble X does not flow into the pulp. It is possible to prevent the pulp liquid from coming into the pulp liquid discharge pipe 24 continuously provided at the bottom of the liquid storage portion 20 and being sucked by the pulp liquid delivery pump 25.
The pulp liquid X can be smoothly circulated.

The bubbles Y overflow from the upper edge of the bubble generating unit 19 to the pulp liquid storing unit 20 as the water level of the pulp liquid X continuously flowed down into the bubble generating unit 19 rises. leak. In the pulp liquid storage unit 20, the bubbles Y are stirred in the pulp liquid X by the pulp liquid X flowing out from the bubble generation unit 19. At this time, the printing ink in the pulp liquid X is adsorbed by the bubbles Y.

Thereafter, the bubbles Y are stored in the pulp liquid storage section 20.
It overflows from the upper edge of the side wall 23, flows out to the bubble receiver 21 of the bubble removing device 5, and is stored in the bubble storage tank 28 through the bubble discharge pipe 27. As a result, the bubbles Y that have adsorbed the printing ink are removed from the pulp liquid storage section 20, and the printing ink can be removed from the pulp liquid X. Further, since the pulp liquid X can be circulated a plurality of times by the pulp liquid delivery device 4, the bubbles Y can be generated in the pulp liquid X a plurality of times even in the single pulp liquid storage tank 3. The printing ink can be sufficiently removed from the pulp liquid X with a simplified structure.

After the pulp liquid X is circulated a plurality of times as described above, the deinking pulp liquid is discharged from the deinking pulp liquid discharging cock 29 (see FIG. 2). Not recycled paper by a paper machine.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of the present invention in a side view with a main part cut away.

FIG. 2 is an explanatory front view of an embodiment of the present invention.

[Explanation of symbols]

X ... Pulp liquid, Y ... Bubbles, 1 ... Deinking device, 2 ... Pulp liquid stirring and flowing device, 3 ... Pulp liquid storage tank, 4 ... Pulp liquid delivery device, 5 ... Bubble removing device, 6 ... Magnet, 7 ... Heaven Plate, 8 ... Bottom plate, 9 ... Side wall plate, 11 ... Injection port, 12 ... Discharge port, 14 ...
Top plate partition plate, 15 ... Bottom plate partition plate, 19 ... Bubble generating unit, 2
DESCRIPTION OF SYMBOLS 1 ... Bubble receiver, 22 ... Pulp liquid discharge port, 24 ... Pulp liquid discharge pipe, 25 ... Pulp liquid delivery pump, 26 ... Pulp liquid delivery pipe, 27 ... Bubble discharge pipe, 28 ... Bubble storage tank.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masaru Ogasawara, 1036-5 Kamuro, Iwatsuki City, Saitama Prefecture, In the Yuhi Dormitory, Hokai Seikan Co., Ltd. (72) Shizuo Kasai 1-2-3-1, Ueno, Iwatsuki City, Saitama Prefecture (72) Inventor Shigetaka Yoshimura 4-8-30 Miyanomori, Chuo-ku, Sapporo-shi, Hokkaido (72) Kantaro Yamamoto 3-4 Kinugasaeicho, Yokosuka City, Kanagawa Yamada Mansion 503

Claims (6)

[Claims] 1. A pulp liquid containing a deinking agent containing a surfactant, which disintegrates waste paper fibers by putting waste paper in water and agitates it, and removes ink components such as printing ink from the waste paper fibers. A pulp liquid storage tank for storing, and a pulp liquid stirring for flowing the pulp liquid while stirring at a position above the pulp liquid storage tank so that the pulp liquid flows down from above the liquid surface of the pulp liquid in the pulp liquid storage tank. A flow device, a pulp liquid delivery device for delivering the pulp liquid in the pulp liquid storage tank to the pulp liquid agitation fluidizing device, and a pulp liquid flowing down from the pulp liquid agitation fluidizing device to the pulp liquid storage tank. A bubble removing device that removes the ink components attached to the bubbles together with the bubbles generated in the pulp liquid storage tank, wherein the pulp liquid stirring and flowing device faces the flow direction of the pulp liquid. A bottom plate that inclines, side wall plates standing on both sides of the bottom plate, a top plate that faces the bottom plate, and a standing plate that is vertically installed at a predetermined interval on the bottom plate and that is perpendicular to the flow direction of the pulp liquid. Are provided on the top plate alternately with a plurality of bottom plate partition plates formed with a gap from the top plate, and the lower end is orthogonal to the flow direction of the pulp liquid and the lower end is spaced from the bottom plate. A plurality of top plate partition plates formed with, an inlet provided in the upstream portion of the top plate for injecting pulp liquid onto the bottom plate, and provided on the downstream side of the bottom plate, along the bottom plate A deinking device, comprising: a discharge port that discharges the flowing pulp liquid from above the liquid surface of the pulp liquid in the pulp liquid storage tank to flow it down. 2. A pulp liquid containing a deinking agent containing a surfactant, which disintegrates the waste paper fibers by throwing the waste paper into water and stirs it, and removes ink components such as printing ink from the waste paper fibers. A pulp liquid storage tank for storing, and a pulp liquid stirring for flowing the pulp liquid while stirring at a position above the pulp liquid storage tank and allowing the pulp liquid to flow down from above the liquid surface of the pulp liquid in the pulp liquid storage tank. A flow device, a pulp liquid delivery device for delivering the pulp liquid in the pulp liquid storage tank to the pulp liquid agitation fluidizing device, and a pulp liquid flowing down from the pulp liquid agitation fluidizing device to the pulp liquid storage tank. And a bubble removing device that removes the ink component adsorbed by the bubbles together with the bubbles generated in the pulp liquid storage tank, wherein the pulp liquid storage tank discharges from the pulp liquid agitation flow device. A deinking apparatus comprising a bottomed cylindrical bubble generating unit that receives the discharged pulp liquid and generates bubbles. 3. A magnet for adsorbing magnetic ink in the pulp liquid is provided in a pulp liquid circulation path comprising the pulp liquid stirring and flowing device, a pulp liquid storage tank, and a pulp liquid delivery device. The deinking device according to claim 1 or 2. 4. The deinking device according to claim 3, wherein the magnet is provided in the pulp liquid agitation flow device. 5. The pulp liquid delivery device comprises a pulp liquid delivery pipe attached to a pulp liquid delivery port for delivering pulp liquid from the pulp liquid storage tank, a pulp liquid delivery pump for delivering pulp liquid, and the pulp liquid delivery device. The deinking device according to any one of claims 1 to 4, comprising a pulp liquid delivery pipe for delivering pulp liquid to an inlet of the pulp liquid agitation fluidizing device by a pump. 6. The bubble removing device is provided along the outer periphery of the pulp liquid storage tank, and has a gutter-shaped bubble receiver for receiving bubbles overflowing from the storage tank, and the bubbles of the bubble receiver are provided outside the storage tank. 6. A bubble discharge pipe for discharging the bubbles to a sheet and a bubble storage tank for storing the bubbles discharged by the bubble discharge pipe.
The deinking device according to item.